gbowne1/ClassicOS
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trying to fix kernel and memory stuff

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This commit is contained in:
Gregory Kenneth Bowne 2024-08-27 19:49:56 -07:00
parent 3554f240a8
commit e6ca3f7488
95 changed files with 2217 additions and 1126 deletions
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@ -7,7 +7,7 @@
"C_Cpp.configurationWarnings": "enabled",
"C_Cpp.default.browse.limitSymbolsToIncludedHeaders": false,
"C_Cpp.default.cStandard": "c11",
"C_Cpp.default.compilerPath": "",
"C_Cpp.default.compilerPath": "/usr/bin/gcc",
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@ -62,5 +62,5 @@
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"C_Cpp.default.intelliSenseMode": "linux-gcc-x64",
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130
ask.txt
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@ -1,4 +1,25 @@
I am making a fully custom x86 32 bit IA32 Operating System in Visual Studio Code 1.81 for Debian Linux. This will not be a linux based OS. It's also not posix, linux, unix, windows, bsd or any other derivitive thereof but does use the same concepts. The system I am developing on has a Intel i7-3770k and is an x86_64 bit and runs Debian 10 Buster Linux with Linux Kernel version 4.19.0-25-amd64 (supports UNIX 98 PTY) and Bash 5.0.3 and the drive has an ext4 partition and a tempfs partition. I have the extension ms-vscode.cpptools installed on VSCode. I also have both gcc 8.3.0 and clang 7.0.1-8+deb10u2 installed. All of my compilers, debuggers, linkers are in /usr/bin. I have Coreutils 8.30, Binutils 2.31.1, Bison 3.3.2, Diffutils 3.7, Findutils 4.6.0.225, Gawk 4.2.1, Grep 3.3, Gzip 1.9, M4 1.4.18, Make 4.2.1, Patch 2.7.6, Perl 5.28.1, Python 3.7.3, Sed 4.7, Tar 1.30, Texinfo 6.5, Xz 5.2.4. The operating system would run on any system that has a 386 CPU up to a 32 bit only Prescott Pentium 4 released in 2004. I am using gcc to compile, ld to link, gdb to debug, nasm to do the assembly and qemu to emulate the system. it has a two stage bootloader. The os should boot from floppy, hard drive and optical media.
I am making a fully custom x86 32 bit IA32 Operating System in Visual Studio Code 1.81 for Debian Linux. This will not be a linux based OS. It's also not posix, linux, unix, windows, bsd or any other derivitive thereof but does use the same concepts. The system I am developing on has a Intel i7-3770k and is an x86_64 bit and runs Debian 10 Buster Linux with Linux Kernel version 4.19.0-25-amd64 (supports UNIX 98 PTY) and Bash 5.0.3 and the drive has an ext4 partition and a tempfs partition. I have the extension ms-vscode.cpptools installed on VSCode. I also have both gcc 8.3.0 and clang 7.0.1-8+deb10u2 installed. All of my compilers, debuggers, linkers are in /usr/bin. I have Coreutils 8.30, Binutils 2.31.1, Bison 3.3.2, Diffutils 3.7, Findutils 4.6.0.225, Gawk 4.2.1, Grep 3.3, Gzip 1.9, M4 1.4.18, Make 4.2.1, Patch 2.7.6, Perl 5.28.1, Python 3.7.3, Sed 4.7, Tar 1.30, Texinfo 6.5, Xz 5.2.4. The operating system would run on any system that has a 386 CPU up to a 32 bit only Prescott Pentium 4 released in 2004 including i386, i486, i586 and i686. I am using gcc to compile, ld to link, gdb to debug, nasm to do the assembly and qemu to emulate the system. it has a two stage bootloader. The os should boot from floppy, hard drive and optical media.
Here is the system ,emory map
BIOS: The Basic Input/Output System often resides in the lower 64KB (first 65536 bytes) of memory.
MBR (Master Boot Record): The first sector of the boot disk (usually 512 bytes) is typically located at 0x00007C00.
VGA Memory: The memory used for graphics display might be mapped in this region (e.g., 0xB8000 for text mode).
Legacy Device Memory: Memory-mapped I/O (MMIO) regions for legacy devices like keyboard, mouse, or floppy controller could be present.
Lower 1GB of RAM: This is the main usable memory region for the kernel, applications, and data. The kernel might load itself here after being booted by the bootloader.
the kernel.c should be kernel_main() and
Kernel Stack Implementation:
Memory Allocation: The kernel reserves a dedicated memory region for the kernel stack during boot or early initialization. This region typically resides within the usable portion of memory allocated for the kernel itself (often within the first 1GB on IA32 systems).
Stack Pointer (ESP): The kernel maintains a stack pointer register (often ESP or RSP on x86 architectures) that points to the top of the kernel stack. Initially, this pointer is set to the end of the allocated stack memory region, indicating an empty stack.
Stack Growth: When a function is called in kernel space, the required data (arguments, local variables, return address) is pushed onto the stack. This decrements the stack pointer value, effectively "growing" the stack downwards in memory.
Stack Protection: The kernel sets up memory protection mechanisms to ensure the stack doesn't grow beyond its allocated region or overwrite other critical kernel data structures.
Stack Overflow Protection: The kernel might implement stack overflow protection mechanisms to detect and handle situations where the stack grows too large and threatens to overwrite other memory areas. This can involve setting up guard pages below the allocated stack space to trigger exceptions if accessed.
here is the file structure:
@ -127,17 +148,44 @@ ClassicOS/
This is my CMakeLists.txt
cmake_minimum_required(VERSION 3.13.4)
project(ClassicOS VERSION 0.0.1 LANGUAGES C)
set(CMAKE_SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/src)
set(CMAKE_BINARY_DIR ${CMAKE_CURRENT_LIST_DIR}/build)
include(x86-baremetal-toolchain.cmake)
project(ClassicOSBL VERSION 0.0.1 LANGUAGES ASM_NASM)
project(ClassicOS VERSION 0.0.1 LANGUAGES C CXX ASM_NASM)
enable_language(ASM_NASM)
set(CMAKE_ASM_NASM_OBJECT_FORMAT elf32)
set(IS_OS_WINDOWS FALSE)
set(IS_OS_LINUX FALSE)
set(IS_OS_MAC FALSE)
if (${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
set(IS_OS_WINDOWS TRUE)
message("Building on the Windows operating system.")
elseif (${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
set(IS_OS_LINUX TRUE)
message("Building on the Linux operating system.")
elseif (${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Darwin")
set(IS_OS_MAC TRUE)
message("Building on the Mac operating system.")
endif ()
# Source files
set(BOOT_SOURCE_FILES
src/boot/boot.asm
src/boot/linker.ld
)
set(GRUB_SOURCE_FILES
src/boot/grub/grub.cfg
src/boot/grub/menu.lst
)
set(DRIVERS_SOURCE_FILES
src/drivers/audio/audio.c
src/drivers/audio/audio.h
@ -147,6 +195,7 @@ set(DRIVERS_SOURCE_FILES
src/drivers/bus/isa.h
src/drivers/bus/mca.c
src/drivers/bus/mca.h
#src/drivers/bus/pci.asm
src/drivers/bus/pci.c
src/drivers/bus/pci.h
src/drivers/bus/vesa.c
@ -154,6 +203,7 @@ set(DRIVERS_SOURCE_FILES
src/drivers/display/display.c
src/drivers/display/display.h
src/drivers/io/io.c
src/drivers/io/io.asm
src/drivers/io/io.h
src/drivers/keyboard/keyboard.c
src/drivers/keyboard/keyboard.h
@ -168,49 +218,59 @@ set(KERNEL_SOURCE_FILES
src/kernel/arch/x86/include/types.h
src/kernel/arch/x86/memory/memory.c
src/kernel/arch/x86/gdt.c
src/kernel/arch/x86/gdt.c
src/kernel/arch/x86/gdt.asm
src/kernel/arch/x86/gdt.h
src/kernel/arch/x86/idt.c
src/kernel/arch/x86/idt.asm
src/kernel/arch/x86/idt.h
src/kernel/arch/x86/isr.c
src/kernel/arch/x86/isr.h
src/kernel/arch/x86/isr/isr.c
src/kernel/arch/x86/isr/isr.h
src/kernel/arch/x86/isr/exceptions.c
src/kernel/arch/x86/isr/exceptions.h
src/kernel/kernel.c
src/kernel/kernel.h
src/kernel/linker.ld
src/kernel/print.c
src/kernel/stack.c
src/kernel/stack.h
)
set(UTIL_SOURCE_FILES
src/EHS.h
src/sys/CPU.h src/sys/CPU.cpp src/sys/CPU_GCC_AMD64.asm
src/Util.h src/Util.cpp
src/Version.h src/Version.cpp
src/Serializer.h
src/Array.h
src/Vector.h
src/SArray.h
src/Str.h
src/PRNG.h
src/HRNG.h src/HRNG_GCC.s
src/Math.h src/Math.cpp src/Math_GCC_AMD64.s
src/Rect.h
src/Range.h src/Range.cpp
src/Color4.h src/Color4.cpp
src/Color3.h src/Color3.cpp
src/Quat.h
src/Vec4.h
src/Vec3.h
src/Vec2.h
src/Mat4.h
src/Mat3.h
src/Mat2.h
)
set_source_files_properties(src/boot/boot.asm PROPERTIES LANGUAGE ASM_NASM)
add_executable(ClassicOS
${BOOT_SOURCE_FILES}
${GRUB_SOURCE_FILES}
${DRIVERS_SOURCE_FILES}
${KERNEL_SOURCE_FILES}
${DRIVERS_SOURCE_FILES}
)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
add_executable(ClassicOSBL
${BOOT_SOURCE_FILES}
${GRUB_SOURCE_FILES}
)
# Enable testing
enable_testing()
target_link_libraries(ClassicOS PRIVATE)
set(CMAKE_C_COMPILER gcc)
set(CMAKE_LINKER ld)
set(CMAKE_EXE_LINKER_FLAGS "-g -s")
set(CMAKE_LINK_FLAGS "${CMAKE_LINK_FLAGS} -e kernel_main")
set(CMAKE_CXX_FLAGS "-g -Wall")
set(CMAKE_C_FLAGS "-g -Wall -m32")
set(CMAKE_C_FLAGS_DEBUG "-g")
set(CMAKE_BUILD_TYPE Debug)
set(CMAKE_GDB_COMMAND gdb)
set(CMAKE_CXX_FLAGS_DEBUG "-g -O0")
set(CMAKE_CXX_COMPILER g++)
set(CMAKE_ASM_COMPILER nasm)
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} --32")
set(CMAKE_SYSTEM_PROCESSOR i386)
set(CMAKE_SYSTEM_NAME None)
set(CMAKE_ASM_NASM_COMPILER nasm)
set(CMAKE_C_STANDARD 17)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src)
set(CMAKE_BINARY_DIR ${CMAKE_CURRENT_SOURCE_DIR}/build)
set_target_properties(ClassicOS PROPERTIES LINK_FLAGS "-T ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld")
message("${CMAKE_EXE_LINKER_FLAGS}")

15
build/CMakeCache.txt
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@ -35,15 +35,13 @@ CMAKE_ASM_NASM_FLAGS_RELEASE:STRING=
//Flags used by the ASM_NASM compiler during RELWITHDEBINFO builds.
CMAKE_ASM_NASM_FLAGS_RELWITHDEBINFO:STRING=
//No help, variable specified on the command line.
CMAKE_BUILD_TYPE:STRING=Debug
//Choose the type of build, options are: None Debug Release RelWithDebInfo
// MinSizeRel ...
CMAKE_BUILD_TYPE:STRING=
//Enable/Disable color output during build.
CMAKE_COLOR_MAKEFILE:BOOL=ON
//No help, variable specified on the command line.
CMAKE_CXX_COMPILER:FILEPATH=/usr/bin/g++
//A wrapper around 'ar' adding the appropriate '--plugin' option
// for the GCC compiler
CMAKE_CXX_COMPILER_AR:FILEPATH=/usr/bin/gcc-ar-8
@ -67,9 +65,6 @@ CMAKE_CXX_FLAGS_RELEASE:STRING=-O3 -DNDEBUG
//Flags used by the CXX compiler during RELWITHDEBINFO builds.
CMAKE_CXX_FLAGS_RELWITHDEBINFO:STRING=-O2 -g -DNDEBUG
//No help, variable specified on the command line.
CMAKE_C_COMPILER:FILEPATH=/usr/bin/gcc
//A wrapper around 'ar' adding the appropriate '--plugin' option
// for the GCC compiler
CMAKE_C_COMPILER_AR:FILEPATH=/usr/bin/gcc-ar-8
@ -108,8 +103,8 @@ CMAKE_EXE_LINKER_FLAGS_RELEASE:STRING=
//Flags used by the linker during RELWITHDEBINFO builds.
CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO:STRING=
//No help, variable specified on the command line.
CMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE
//Enable/Disable output of compile commands during generation.
CMAKE_EXPORT_COMPILE_COMMANDS:BOOL=OFF
//Install path prefix, prepended onto install directories.
CMAKE_INSTALL_PREFIX:PATH=/usr/local

2
build/CMakeFiles/3.13.4/CMakeCCompiler.cmake
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@ -69,5 +69,5 @@ endif()
set(CMAKE_C_IMPLICIT_LINK_LIBRARIES "")
set(CMAKE_C_IMPLICIT_LINK_DIRECTORIES "/usr/lib/gcc/x86_64-linux-gnu/8/32;/usr/lib/i386-linux-gnu;/usr/lib32;/lib/i386-linux-gnu;/lib32;/usr/lib/gcc/x86_64-linux-gnu/8;/usr/lib")
set(CMAKE_C_IMPLICIT_LINK_DIRECTORIES "/usr/lib/gcc/x86_64-linux-gnu/8/32;/usr/x86_64-linux-gnu/lib32;/usr/lib/i386-linux-gnu;/usr/lib32;/lib/i386-linux-gnu;/lib32;/usr/lib/gcc/x86_64-linux-gnu/8;/usr/x86_64-linux-gnu/lib;/usr/lib")
set(CMAKE_C_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES "")

2
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@ -72,5 +72,5 @@ endif()
set(CMAKE_CXX_IMPLICIT_LINK_LIBRARIES "")
set(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES "/usr/lib/gcc/x86_64-linux-gnu/8/32;/usr/lib/i386-linux-gnu;/usr/lib32;/lib/i386-linux-gnu;/lib32;/usr/lib/gcc/x86_64-linux-gnu/8;/usr/lib")
set(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES "/usr/lib/gcc/x86_64-linux-gnu/8/32;/usr/x86_64-linux-gnu/lib32;/usr/lib/i386-linux-gnu;/usr/lib32;/lib/i386-linux-gnu;/lib32;/usr/lib/gcc/x86_64-linux-gnu/8;/usr/x86_64-linux-gnu/lib;/usr/lib")
set(CMAKE_CXX_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES "")

6
build/CMakeFiles/CMakeError.log
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@ -1,8 +1,4 @@
Checking whether the ASM_NASM compiler is GNU using "--version" did not match "(GNU assembler)|(GCC)|(Free Software Foundation)":
NASM version 2.14
Checking whether the ASM_NASM compiler is Clang using "--version" did not match "(clang version)":
NASM version 2.14
Checking whether the ASM_NASM compiler is AppleClang using "--version" did not match "(Apple LLVM version)":
Checking whether the ASM_NASM compiler is GNU using "--version" terminated after 10 s due to timeout.Checking whether the ASM_NASM compiler is Clang using "--version" terminated after 10 s due to timeout.Checking whether the ASM_NASM compiler is AppleClang using "--version" did not match "(Apple LLVM version)":
NASM version 2.14
Checking whether the ASM_NASM compiler is HP using "-V" did not match "HP C":
nasm:error: unrecognised option `-V'

248
build/CMakeFiles/CMakeOutput.log
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@ -32,14 +32,14 @@ The CXX compiler identification is GNU, found in "/home/gbowne1/Documents/Classi
Determining if the C compiler works passed with the following output:
Change Dir: /home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp
Run Build Command:"/usr/bin/make" "cmTC_3f008/fast"
/usr/bin/make -f CMakeFiles/cmTC_3f008.dir/build.make CMakeFiles/cmTC_3f008.dir/build
Run Build Command:"/usr/bin/make" "cmTC_950ed/fast"
/usr/bin/make -f CMakeFiles/cmTC_950ed.dir/build.make CMakeFiles/cmTC_950ed.dir/build
make[1]: Entering directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_3f008.dir/testCCompiler.c.o
/usr/bin/gcc -m32 -ffreestanding -nostdlib -std=gnu11 -o CMakeFiles/cmTC_3f008.dir/testCCompiler.c.o -c /home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp/testCCompiler.c
Linking C executable cmTC_3f008
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_3f008.dir/link.txt --verbose=1
/usr/bin/gcc -m32 -ffreestanding -nostdlib -e kernel_main -T/home/gbowne1/Documents/ClassicOS/linker.ld -m32 -z noexecstack CMakeFiles/cmTC_3f008.dir/testCCompiler.c.o -o cmTC_3f008
Building C object CMakeFiles/cmTC_950ed.dir/testCCompiler.c.o
/usr/bin/gcc -m32 -ffreestanding -nostdlib -std=gnu11 -o CMakeFiles/cmTC_950ed.dir/testCCompiler.c.o -c /home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp/testCCompiler.c
Linking C executable cmTC_950ed
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_950ed.dir/link.txt --verbose=1
/usr/bin/gcc -m32 -ffreestanding -nostdlib -e kernel_main -T/home/gbowne1/Documents/ClassicOS/linker.ld -m32 -z noexecstack CMakeFiles/cmTC_950ed.dir/testCCompiler.c.o -o cmTC_950ed
/usr/bin/ld: warning: cannot find entry symbol kernel_main; defaulting to 0000000000100000
make[1]: Leaving directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp'
@ -47,14 +47,14 @@ make[1]: Leaving directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/C
Detecting C compiler ABI info compiled with the following output:
Change Dir: /home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp
Run Build Command:"/usr/bin/make" "cmTC_e0e28/fast"
/usr/bin/make -f CMakeFiles/cmTC_e0e28.dir/build.make CMakeFiles/cmTC_e0e28.dir/build
Run Build Command:"/usr/bin/make" "cmTC_50241/fast"
/usr/bin/make -f CMakeFiles/cmTC_50241.dir/build.make CMakeFiles/cmTC_50241.dir/build
make[1]: Entering directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_e0e28.dir/CMakeCCompilerABI.c.o
/usr/bin/gcc -m32 -ffreestanding -nostdlib -std=gnu11 -o CMakeFiles/cmTC_e0e28.dir/CMakeCCompilerABI.c.o -c /usr/share/cmake-3.13/Modules/CMakeCCompilerABI.c
Linking C executable cmTC_e0e28
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_e0e28.dir/link.txt --verbose=1
/usr/bin/gcc -m32 -ffreestanding -nostdlib -e kernel_main -T/home/gbowne1/Documents/ClassicOS/linker.ld -m32 -z noexecstack -v CMakeFiles/cmTC_e0e28.dir/CMakeCCompilerABI.c.o -o cmTC_e0e28
Building C object CMakeFiles/cmTC_50241.dir/CMakeCCompilerABI.c.o
/usr/bin/gcc -m32 -ffreestanding -nostdlib -std=gnu11 -o CMakeFiles/cmTC_50241.dir/CMakeCCompilerABI.c.o -c /usr/share/cmake-3.13/Modules/CMakeCCompilerABI.c
Linking C executable cmTC_50241
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/usr/bin/gcc -m32 -ffreestanding -nostdlib -e kernel_main -T/home/gbowne1/Documents/ClassicOS/linker.ld -m32 -z noexecstack -v CMakeFiles/cmTC_50241.dir/CMakeCCompilerABI.c.o -o cmTC_50241
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COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
@ -65,11 +65,11 @@ Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-6' --with-b
Thread model: posix
gcc version 8.3.0 (Debian 8.3.0-6)
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/8/32/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib32/:/lib/i386-linux-gnu/:/lib/../lib32/:/usr/lib/i386-linux-gnu/:/usr/lib/../lib32/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../:/lib/i386-linux-gnu/:/lib/:/usr/lib/i386-linux-gnu/:/usr/lib/
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arg [-o] ==> ignore
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arg [cmTC_50241] ==> ignore
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arg [-L/usr/lib/gcc/x86_64-linux-gnu/8/../../../../x86_64-linux-gnu/lib/../lib32] ==> dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../../../x86_64-linux-gnu/lib/../lib32]
arg [-L/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu] ==> dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu]
arg [-L/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib32] ==> dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib32]
arg [-L/lib/i386-linux-gnu] ==> dir [/lib/i386-linux-gnu]
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arg [-L/usr/lib/../lib32] ==> dir [/usr/lib/../lib32]
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arg [-L/usr/lib/gcc/x86_64-linux-gnu/8/../../..] ==> dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../..]
arg [-L/lib/i386-linux-gnu] ==> dir [/lib/i386-linux-gnu]
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arg [-T] ==> ignore
arg [/home/gbowne1/Documents/ClassicOS/linker.ld] ==> ignore
collapse library dir [/usr/lib/gcc/x86_64-linux-gnu/8/32] ==> [/usr/lib/gcc/x86_64-linux-gnu/8/32]
collapse library dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../../../x86_64-linux-gnu/lib/../lib32] ==> [/usr/x86_64-linux-gnu/lib32]
collapse library dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu] ==> [/usr/lib/i386-linux-gnu]
collapse library dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib32] ==> [/usr/lib32]
collapse library dir [/lib/i386-linux-gnu] ==> [/lib/i386-linux-gnu]
@ -139,12 +142,13 @@ Parsed C implicit link information from above output:
collapse library dir [/usr/lib/i386-linux-gnu] ==> [/usr/lib/i386-linux-gnu]
collapse library dir [/usr/lib/../lib32] ==> [/usr/lib32]
collapse library dir [/usr/lib/gcc/x86_64-linux-gnu/8] ==> [/usr/lib/gcc/x86_64-linux-gnu/8]
collapse library dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../../../x86_64-linux-gnu/lib] ==> [/usr/x86_64-linux-gnu/lib]
collapse library dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu] ==> [/usr/lib/i386-linux-gnu]
collapse library dir [/usr/lib/gcc/x86_64-linux-gnu/8/../../..] ==> [/usr/lib]
collapse library dir [/lib/i386-linux-gnu] ==> [/lib/i386-linux-gnu]
collapse library dir [/usr/lib/i386-linux-gnu] ==> [/usr/lib/i386-linux-gnu]
implicit libs: []
implicit dirs: [/usr/lib/gcc/x86_64-linux-gnu/8/32;/usr/lib/i386-linux-gnu;/usr/lib32;/lib/i386-linux-gnu;/lib32;/usr/lib/gcc/x86_64-linux-gnu/8;/usr/lib]
implicit dirs: [/usr/lib/gcc/x86_64-linux-gnu/8/32;/usr/x86_64-linux-gnu/lib32;/usr/lib/i386-linux-gnu;/usr/lib32;/lib/i386-linux-gnu;/lib32;/usr/lib/gcc/x86_64-linux-gnu/8;/usr/x86_64-linux-gnu/lib;/usr/lib]
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Change Dir: /home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp
Run Build Command:"/usr/bin/make" "cmTC_ba45b/fast"
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make[1]: Entering directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp'
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make[1]: Leaving directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp'
@ -174,14 +178,14 @@ make[1]: Leaving directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/C
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/usr/bin/gcc -m32 -ffreestanding -nostdlib -e kernel_main -T/home/gbowne1/Documents/ClassicOS/linker.ld -m32 -z noexecstack CMakeFiles/cmTC_3b6b2.dir/feature_tests.c.o -o cmTC_3b6b2
Building C object CMakeFiles/cmTC_3fc08.dir/feature_tests.c.o
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/usr/bin/gcc -m32 -ffreestanding -nostdlib -e kernel_main -T/home/gbowne1/Documents/ClassicOS/linker.ld -m32 -z noexecstack CMakeFiles/cmTC_3fc08.dir/feature_tests.c.o -o cmTC_3fc08
/usr/bin/ld: warning: cannot find entry symbol kernel_main; defaulting to 0000000000100000
make[1]: Leaving directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp'
@ -195,14 +199,14 @@ make[1]: Leaving directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/C
Detecting C [-std=c90] compiler features compiled with the following output:
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make[1]: Entering directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_513a6.dir/feature_tests.c.o
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Linking C executable cmTC_513a6
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Building C object CMakeFiles/cmTC_f007b.dir/feature_tests.c.o
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make[1]: Leaving directory '/home/gbowne1/Documents/ClassicOS/build/CMakeFiles/CMakeTmp'
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"/usr/share/cmake-3.13/Modules/Compiler/SunPro-CXX-DetermineCompiler.cmake"
"/usr/share/cmake-3.13/Modules/Compiler/TI-DetermineCompiler.cmake"
"/usr/share/cmake-3.13/Modules/Compiler/TinyCC-C-DetermineCompiler.cmake"
"/usr/share/cmake-3.13/Modules/Compiler/VisualAge-C-DetermineCompiler.cmake"
"/usr/share/cmake-3.13/Modules/Compiler/VisualAge-CXX-DetermineCompiler.cmake"
"/usr/share/cmake-3.13/Modules/Compiler/Watcom-DetermineCompiler.cmake"
"/usr/share/cmake-3.13/Modules/Compiler/XL-C-DetermineCompiler.cmake"
"/usr/share/cmake-3.13/Modules/Compiler/XL-CXX-DetermineCompiler.cmake"
"/usr/share/cmake-3.13/Modules/Compiler/zOS-C-DetermineCompiler.cmake"
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"/usr/share/cmake-3.13/Modules/Internal/FeatureTesting.cmake"
"/usr/share/cmake-3.13/Modules/Platform/Linux-Determine-CXX.cmake"
"/usr/share/cmake-3.13/Modules/Platform/Linux-GNU-C.cmake"
"/usr/share/cmake-3.13/Modules/Platform/Linux-GNU-CXX.cmake"
"/usr/share/cmake-3.13/Modules/Platform/Linux-GNU.cmake"
@ -42,6 +114,12 @@ set(CMAKE_MAKEFILE_OUTPUTS
# Byproducts of CMake generate step:
set(CMAKE_MAKEFILE_PRODUCTS
"CMakeFiles/3.13.4/CMakeSystem.cmake"
"CMakeFiles/3.13.4/CMakeASM_NASMCompiler.cmake"
"CMakeFiles/3.13.4/CMakeCCompiler.cmake"
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@ -12,7 +12,7 @@ if(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)
string(REGEX REPLACE "^[^A-Za-z0-9_]+" ""
CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
else()
set(CMAKE_INSTALL_CONFIG_NAME "Debug")
set(CMAKE_INSTALL_CONFIG_NAME "")
endif()
message(STATUS "Install configuration: \"${CMAKE_INSTALL_CONFIG_NAME}\"")
endif()

48
src/boot/boot.asm
View File

@ -21,43 +21,45 @@ start:
EnableA20Gate:
call TestA20
cmp ax, 1
je A20Enabled
jne A20Disabled
; A20 is already enabled, skip further checks
jmp A20Enabled
tryUsingBIOS:
mov ax, 0x2401
int 0x15
call TestA20
cmp ax, 1
je A20Enabled
jne A20Disabled
tryUsingKeyboardController:
cli
call WaitCommand
mov al, 0xAD ;Disable the keyboard
mov al, 0xAD
out 0x64, al
call WaitCommand
mov al, 0xD0 ;Read from input
mov al, 0xD0
out 0x64, al
call WaitData
in al, 0x60 ;Read input from keyboard
push ax ;Save it
in al, 0x60
push ax
call WaitCommand
mov al, 0xD1 ;Write to output
mov al, 0xD1
out 0x64, al
call WaitCommand
pop ax ;Write to input back with bit #2 set
pop ax
or al, 2
out 0x60, al
call WaitCommand
mov al, 0xAE ;Enable Keyboard
mov al, 0xAE
out 0x64, al
call WaitCommand
sti
jmp A20KeyboardCheck
@ -76,7 +78,7 @@ WaitData:
A20KeyboardCheck:
call TestA20
cmp ax, 1
je A20Enabled
jne A20Disabled
UseFastA20Method:
in al, 0x92
@ -84,7 +86,7 @@ UseFastA20Method:
out 0x92, al
call TestA20
cmp ax, 1
je A20Enabled
jne A20Disabled
;Else bail out, A20 cannot be enabled, maybe :)
A20Error:
@ -96,26 +98,34 @@ A20Error:
int 19h
jmp $
A20Disabled:
jmp A20Error
;If we ever get here, A20 is enabled!
A20Enabled:
LoadSecondStage:
push es
mov ax, 0x7e0
mov ax, 0x7E0
mov es, ax
stc
mov dh, 0
mov ah, 0x02
mov al, 2 ;load 2 sectors
mov al, 2
mov ch, 0
mov cl, 2
mov dl, [bootdev]
xor bx, bx ; [es:bx] = 0x07e0:0x0000
xor bx, bx
int 13h
jnc load_success
jc disk_error
pop es
mov dl, [bootdev]
jmp 0x7E0:0x0000
disk_error:
mov si, disk_read_error_msg
@ -125,7 +135,7 @@ disk_error:
xor ax, ax
int 19h
jmp $
jmp $
load_success:
pop es
@ -206,8 +216,8 @@ A20Exit:
;;;;;;End of function;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
disk_read_error_msg db 'Error Reading disk. Press any key to reboot. Code : 0x01', 0
A20_error_msg db 'An Internal error occured. Press any key to reboot. Code: 0x02', 0
disk_read_error_msg db 'Disk read error. Boot failed.', 0
A20_error_msg db 'Failed to enable A20 line. Boot aborted.', 0
bootdev db 0
times 442 - ($-$$) db 0

BIN
src/cpu/cpu Executable file
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Binary file not shown.

115
src/cpu/cpu.c
View File

@ -1,83 +1,46 @@
#include "cpu.h"
#include <stdint.h>
#include <stdio.h>
// Function to read a 32-bit value from a CPU register
uint32_t read_register(uint8_t reg) {
uint32_t value;
__asm__ volatile("mov %0, %%" : "+r"(value) : "c"(reg));
return value;
}
// Existing functions
uint32_t read_register(uint8_t reg) { /*...*/ }
void write_register(uint8_t reg, uint32_t value) { /*...*/ }
void switch_to_protected_mode() { /*...*/ }
// Function to write a 32-bit value to a CPU register
void write_register(uint8_t reg, uint32_t value) {
__asm__ volatile("mov %0, %%" : : "c"(reg), "r"(value));
}
// Function to read the value of the CR0 register
uint32_t read_cr0()
// Integrated cpuid function
/*void cpuid(uint32_t function, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
{
uint32_t value;
__asm__ volatile("mov %%cr0, %0" : "=r"(value));
return value;
asm volatile(
"cpuid"
: "=a"(*eax),
"=b"(*ebx),
"=c"(*ecx),
"=d"(*edx)
: "a"(function));
}
*/
// Optionally, integrate identify_cpu function
void identify_cpu()
{
uint32_t max_leaf;
uint32_t vendor_id[4];
uint32_t eax, ebx, ecx, edx;
cpuid(0, &eax, &ebx, &ecx, &edx);
max_leaf = eax;
cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
vendor_id[0] = eax;
vendor_id[1] = ebx;
vendor_id[2] = ecx;
vendor_id[3] = edx;
printf("Vendor ID: %.4s%.4s\n", (char *)&vendor_id[0], (char *)&vendor_id[1]);
printf("Maximum leaf value: %u\n", max_leaf);
}
// Function to write a value to the CR0 register
void write_cr0(uint32_t value)
{
__asm__ volatile("mov %0, %%cr0" : : "r"(value));
}
// Function to switch from real mode to protected mode
void switch_to_protected_mode()
{
uint32_t cr0 = read_cr0();
cr0 |= 0x1; // Set the PE bit to switch to protected mode
write_cr0(cr0);
}
// Write a byte to a port
void outb(uint16_t port, uint8_t value)
{
__asm__ volatile ("outb %0, %1" : : "a"(value), "Nd"(port));
}
// Read a byte from a port
uint8_t inb(uint16_t port)
{
uint8_t value;
__asm__ volatile ("inb %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
// Write a word to a port
void outw(uint16_t port, uint16_t value)
{
__asm__ volatile ("outw %0, %1" : : "a"(value), "Nd"(port));
}
// Read a word from a port
uint16_t inw(uint16_t port)
{
uint16_t value;
__asm__ volatile ("inw %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
// Write a double word to a port
void outl(uint16_t port, uint32_t value)
{
__asm__ volatile ("outl %0, %1" : : "a"(value), "Nd"(port));
}
// Read a double word from a port
uint32_t inl(uint16_t port)
{
uint32_t value;
__asm__ volatile ("inl %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
// Execute the CPUID instruction
void cpuid(uint32_t code, uint32_t *a, uint32_t *d)
{
__asm__ volatile ("cpuid" : "=a"(*a), "=d"(*d) : "a"(code) : "ecx", "ebx");
int main() {
identify_cpu();
return 0;
}

26
src/cpu/cpu.h
View File

@ -3,30 +3,12 @@
#include <stdint.h>
// Function to read a 32-bit value from a CPU register
// Existing declarations
uint32_t read_register(uint8_t reg);
// Function to write a 32-bit value to a CPU register
void write_register(uint8_t reg, uint32_t value);
// Function to read the value of the CR0 register
uint32_t read_cr0();
// Function to write a value to the CR0 register
void write_cr0(uint32_t value);
// Function to switch from real mode to protected mode
void switch_to_protected_mode();
void outb(uint16_t port, uint8_t value);
uint8_t inb(uint16_t port);
// New declaration for cpuid
void cpuid(uint32_t function, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
void outw(uint16_t port, uint16_t value);
uint16_t inw(uint16_t port);
void outl(uint16_t port, uint32_t value);
uint32_t inl(uint16_t port);
void cpuid(uint32_t code, uint32_t *a, uint32_t *d);
#endif
#endif // CPU_H

14
src/cpu/cpuid.S Normal file
View File

@ -0,0 +1,14 @@
.global cpuid
.type cpuid, @function
cpuid:
push %rbp
mov %rsp, %rbp
sub $16, %rsp
mov %rdi, %rax
cpuid
mov %rax, 8(%rbp)
mov %rbx, 12(%rbp)
mov %rcx, 16(%rbp)
mov %rdx, 20(%rbp)
leave
ret

32
src/cpu/cpuid.asm
View File

@ -1,32 +0,0 @@
[bits 32]
global cpuid
cpuid:
; Save registers
push ebp
mov ebp, esp
push ebx
push edi
push esi
; Input parameter in EAX register
mov eax, [ebp + 8] ; Assuming the input is passed on the stack
; Call CPUID instruction (clobbers EAX, EBX, ECX, EDX)
cpuid
; Move output values to the appropriate registers
mov esi, eax ; Output EAX
mov edi, ebx ; Output EBX
mov ecx, ecx ; Output ECX
mov edx, edx ; Output EDX
; Restore registers and clean up the stack
pop esi
pop edi
pop ebx
mov esp, ebp
pop ebp
ret

36
src/cpu/cpuid.c
View File

@ -1,36 +0,0 @@
#include "cpuid.h"
#include <stdint.h>
void cpuid(uint32_t code, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) {
asm volatile ("cpuid" : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) : "a" (code));
}
void identify_cpu() {
uint32_t max_leaf;
uint32_t vendor_id[4];
uint32_t eax, ebx, ecx, edx;
// Get the maximum supported leaf value (CPUID function)
cpuid(0, &eax, &ebx, &ecx, &edx);
max_leaf = eax;
// Get the vendor ID string
cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
vendor_id[0] = eax;
vendor_id[1] = ebx;
vendor_id[2] = ecx;
vendor_id[3] = edx;
// Print the vendor ID string (assuming ASCII characters)
printf("Vendor ID: %.4s%.4s\n", (char *)&vendor_id[0], (char *)&vendor_id[1]);
// Identify basic features based on CPUID information (optional, needs further logic)
// ... (code to check specific CPU features using max_leaf and additional CPUID calls) ...
printf("Maximum leaf value: %u\n", max_leaf);
}
int main() {
identify_cpu();
return 0;
}

7
src/cpu/cpuid.h
View File

@ -1,7 +0,0 @@
#ifndef CPUID_H
#define CPUID_H
// Function prototypes for CPUID instruction
void cpuid(uint32_t code, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
#endif

89
src/drivers/audio/audio.c
View File

@ -1,32 +1,83 @@
#include "audio.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <time.h>
// Audio controller base address
#define AUDIO_BASE_ADDRESS 0x0000
// Audio controller data port
// Audio controller register offsets
#define AUDIO_DATA_PORT 0x00
// Audio controller command port
#define AUDIO_COMMAND_PORT 0x01
#define AUDIO_STATUS_PORT 0x02
#define AUDIO_VOLUME_PORT 0x03
// Initialize the audio driver
void audio_init()
{
// Add any necessary initialization code here
#define AUDIO_REG(offset) (*((volatile uint32_t *)(AUDIO_BASE_ADDRESS + (offset))))
#define AUDIO_TIMEOUT_MS 1000
#define AUDIO_READY_BIT 0x01
static audio_status_t audio_wait_for_ready() {
clock_t start = clock();
while (!(AUDIO_REG(AUDIO_STATUS_PORT) & AUDIO_READY_BIT)) {
if ((clock() - start) * 1000 / CLOCKS_PER_SEC > AUDIO_TIMEOUT_MS) {
return AUDIO_ERROR_TIMEOUT;
}
}
return AUDIO_OK;
}
// Play audio from a buffer
void audio_play(const uint8_t *buffer, size_t size)
{
// Add any necessary code to play audio from the buffer here
audio_status_t audio_init(const audio_config_t *config) {
if (config == NULL) {
return AUDIO_ERROR_INIT;
}
// Reset the audio controller
AUDIO_REG(AUDIO_COMMAND_PORT) = 0x12345678; // Placeholder reset command
// Set sample rate
AUDIO_REG(AUDIO_COMMAND_PORT) = config->sample_rate;
// Set bit depth and channels
uint32_t format = (config->bit_depth << 8) | config->channels;
AUDIO_REG(AUDIO_COMMAND_PORT) = format;
// Enable audio interrupt (placeholder)
AUDIO_REG(AUDIO_COMMAND_PORT) = 0x87654321;
return audio_wait_for_ready();
}
// Stop audio playback
void audio_stop()
{
// Add any necessary code to stop audio playback here
audio_status_t audio_play(const uint8_t *buffer, size_t size) {
if (buffer == NULL || size == 0) {
return AUDIO_ERROR_PLAY;
}
// Set buffer address and size
AUDIO_REG(AUDIO_DATA_PORT) = (uint32_t)buffer;
AUDIO_REG(AUDIO_DATA_PORT + 4) = size;
// Start playback
AUDIO_REG(AUDIO_COMMAND_PORT) = 0xABCD1234; // Placeholder play command
return audio_wait_for_ready();
}
audio_status_t audio_stop() {
AUDIO_REG(AUDIO_COMMAND_PORT) = 0x87654321; // Placeholder stop command
return audio_wait_for_ready();
}
// Implement the rest of the functions here...
void audio_interrupt_handler() {
// Handle various interrupt scenarios (e.g., buffer underrun, playback complete)
uint32_t status = AUDIO_REG(AUDIO_STATUS_PORT);
if (status & 0x01) { // Example: Buffer underrun
// Handle buffer underrun
}
if (status & 0x02) { // Example: Playback complete
// Handle playback complete
}
// Clear interrupt flags
AUDIO_REG(AUDIO_STATUS_PORT) = status;
}

31
src/drivers/audio/audio.h
View File

@ -1,17 +1,30 @@
#ifndef AUDIO_H
#define AUDIO_H
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stddef.h>
// Initialize the audio driver
void audio_init();
typedef enum {
AUDIO_OK,
AUDIO_ERROR_INIT,
AUDIO_ERROR_PLAY,
AUDIO_ERROR_STOP,
AUDIO_ERROR_TIMEOUT
} audio_status_t;
// Play audio from a buffer
void audio_play(const uint8_t* buffer, size_t size);
typedef struct {
uint32_t sample_rate;
uint8_t bit_depth;
uint8_t channels;
} audio_config_t;
// Stop audio playback
void audio_stop();
audio_status_t audio_init(const audio_config_t *config);
audio_status_t audio_play(const uint8_t *buffer, size_t size);
audio_status_t audio_stop();
audio_status_t audio_queue_buffer(const uint8_t *buffer, size_t size);
audio_status_t audio_get_buffer_status(size_t *remaining_bytes);
audio_status_t audio_set_volume(uint8_t volume);
audio_status_t audio_get_volume(uint8_t *volume);
void audio_interrupt_handler();
#endif
#endif // AUDIO_H

70
src/drivers/bus/eisa.c
View File

@ -1,5 +1,6 @@
#include "eisa.h"
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
@ -18,10 +19,36 @@
// EISA bus controller command port
#define EISA_COMMAND_PORT 0x01
// EISA bus controller interrupt control port
#define EISA_INTERRUPT_CONTROL_PORT 0x03 // Placeholder, replace with actual address
// EISA bus controller DMA channel configuration port
#define EISA_DMA_CHANNEL_CONFIG_PORT 0x04 // Placeholder, replace with actual address
// Initialize the EISA bus
void eisa_init()
{
// Add any necessary initialization code here
// Reset the EISA bus controller (if supported)
eisa_write(EISA_COMMAND_PORT, 0xFF); // Example: Send a reset command
// Configure base address registers (if needed)
eisa_write(EISA_BASE_ADDRESS + 1, 0x0000); // Example: Set base address register
eisa_write(EISA_BASE_ADDRESS + 2, 0x0000); // Example: Set another base address register
// Set up interrupts (example)
eisa_write(EISA_INTERRUPT_CONTROL_PORT, 0x00); // Enable/disable interrupts
// Configure DMA channels (example)
eisa_write(EISA_DMA_CHANNEL_CONFIG_PORT, 0x00); // Configure DMA channels
// Other hardware-specific initialization...
}
void log_error(const char *format, ...)
{
va_list args;
va_start(args, format);
vprintf(format, args);
va_end(args);
}
// Detect and configure EISA devices
@ -29,6 +56,7 @@ void eisa_detect_devices()
{
uint32_t bus, slot, func;
uint16_t vendor_id, device_id, class_code;
uint8_t dma_channel;
for (bus = 0; bus < 256; bus++)
{
@ -41,39 +69,41 @@ void eisa_detect_devices()
vendor_id = id & 0xFFFF;
device_id = (id >> 16) & 0xFFFF;
class_code = eisa_read_config_word(address, 10);
if (vendor_id != 0xFFFF)
{
// Device detected, do something with it
if (vendor_id == MY_DEVICE_VENDOR_ID &&
device_id == MY_DEVICE_DEVICE_ID &&
class_code == MY_DEVICE_CLASS_CODE)
{
// This is my device, configure it
uint32_t config1 = eisa_read_config_dword(address, 4);
uint32_t config2 = eisa_read_config_dword(address, 8);
//printf("Config1: %u\n", config1);
//printf("Config2: %u\n", config2);
// Do something with the configuration data
// Check for specific bits in config1
if (config1 & 0x00000001) {
// Enable feature 1 based on bit 0 of config1
eisa_write(0xspecific_port_1, 0xvalue_to_enable_feature_1);
if ((config1 & 0x00000010) == 0)
{
dma_channel = (config1 >> 4) & 0x03;
// Replace 0xspecific_port_2 with the actual port number
eisa_write(0x02, dma_channel); // Example: Assuming 0x02 is the correct port number
log_error("Failed to enable feature 1");
}
if (config1 & 0x00000010) {
// Set DMA channel based on bits 4-5 of config1
uint8_t dma_channel = (config1 >> 4) & 0x03;
eisa_write(0xspecific_port_2, dma_channel);
if (!dma_channel)
{
log_error("Failed to set DMA channel");
}
// Check for specific bits in config2
if (config2 & 0x00000001) {
// Configure interrupt line based on bit 0 of config2
eisa_write(0xspecific_port_3, 0xinterrupt_line_number);
if (!(config2 & 0x00000001))
{
log_error("Failed to configure interrupt line");
}
}
else
{
log_error("Unknown device detected at address: 0x%04X", address);
}
}
else
{
log_error("No device found at address: 0x%04X", address);
}
}
}

1
src/drivers/bus/eisa.h
View File

@ -5,6 +5,7 @@
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdarg.h>
// Initialize the EISA bus
void eisa_init();

48
src/drivers/bus/isa.c
View File

@ -1,8 +1,10 @@
#include "isa.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdarg.h> // Include for va_list and related functions
#include <stdio.h>
#include <string.h>
// ISA bus controller base address
#define ISA_BASE_ADDRESS 0x0000
@ -30,8 +32,26 @@ uint8_t isa_read(uint16_t port)
{
uint8_t value;
// Read from the specified port
__asm__ volatile("inb %1, %0" : "=a"(value) : "dN"(port));
// Check for invalid port
if (port > 0xFF)
{
// Prepare a buffer to hold the formatted string
char buffer[64];
va_list args;
va_start(args, port);
vsnprintf(buffer, sizeof(buffer), "Invalid port address: 0x%x\n", port);
va_end(args);
// Use vfprintf to print the contents of the buffer to stderr
vfprintf(stderr, buffer, NULL);
return 0xFF; // Indicate error
}
// Read from the specified port with improved assembly attributes
__asm__ volatile("inb %1, %0"
: "=r"(value)
: "Nd"(port)
: "memory");
return value;
}
@ -39,6 +59,24 @@ uint8_t isa_read(uint16_t port)
// Write to an ISA device
void isa_write(uint16_t port, uint8_t value)
{
// Write the specified value to the specified port
__asm__ volatile("outb %0, %1" : : "a"(value), "dN"(port));
// Check for invalid port
if (port > 0xFF)
{
// Prepare a buffer to hold the formatted string
char buffer[64];
va_list args;
va_start(args, port);
vsnprintf(buffer, sizeof(buffer), "Invalid port address: 0x%x\n", port);
va_end(args);
// Use vfprintf to print the contents of the buffer to stderr
vfprintf(stderr, buffer, NULL);
return;
}
// Write to the specified port with improved assembly attributes
__asm__ volatile("outb %0, %1"
:
: "r"(value), "Nd"(port)
: "memory");
}

17
src/drivers/io/io.h
View File

@ -3,6 +3,17 @@
#include <stdint.h>
// Inline assembly implementations for I/O operations
static inline void outb(uint16_t port, uint8_t val) {
asm volatile ("outb %0, %1" : : "a"(val), "Nd"(port));
}
static inline uint8_t inb(uint16_t port) {
uint8_t ret;
asm volatile ("inb %1, %0" : "=a"(ret) : "Nd"(port));
return ret;
}
// Function to initialize the COM and LPT ports
void io_init(uint16_t port);
@ -18,11 +29,7 @@ char io_read_lpt();
// Function to write to the LPT port
void io_write_lpt(char data);
// Function declarations for keyboard.c
extern uint8_t inb(uint16_t port);
extern void outb(uint16_t port, uint8_t data);
// Function declaration for interrupt handler installation
void install_interrupt_handler(uint8_t interrupt, void (*handler)(void));
#endif /* IO_H */

1
src/drivers/io/serial.c
View File

@ -1,4 +1,5 @@
#include "serial.h"
#include "io.h" // Include the new I/O header
#include <stddef.h>
#include <stdint.h>

3
src/drivers/io/serial.h
View File

@ -3,10 +3,11 @@
#include <stdint.h>
// Function prototypes
void init_serial(uint16_t com);
int serial_received(uint16_t com);
char read_serial(uint16_t com);
int is_transmit_empty(uint16_t com);
void write_serial(uint16_t com, char a);
#endif
#endif // SERIAL_H

136
src/drivers/keyboard/keyboard.c
View File

@ -3,6 +3,7 @@
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
// Keyboard input buffer
#define KEYBOARD_BUFFER_SIZE 32
@ -14,6 +15,98 @@
#define KEYBOARD_ACKNOWLEDGE_SCANCODE 0xFA
#define KEYCODE_UNKNOWN 0xFF
#define KEYCODE_C 0x03
#define KEYCODE_ESC 0x01
#define KEYCODE_1 0x02
#define KEYCODE_2 0x03
#define KEYCODE_3 0x04
#define KEYCODE_4 0x05
#define KEYCODE_5 0x06
#define KEYCODE_6 0x07
#define KEYCODE_7 0x08
#define KEYCODE_8 0x09
#define KEYCODE_9 0x0A
#define KEYCODE_0 0x0B
#define KEYCODE_MINUS 0x0C
#define KEYCODE_EQUALS 0x0D
#define KEYCODE_BACKSPACE 0x0E
#define KEYCODE_TAB 0x0F
#define KEYCODE_Q 0x10
#define KEYCODE_W 0x11
#define KEYCODE_E 0x12
#define KEYCODE_R 0x13
#define KEYCODE_T 0x14
#define KEYCODE_Y 0x15
#define KEYCODE_U 0x16
#define KEYCODE_I 0x17
#define KEYCODE_O 0x18
#define KEYCODE_P 0x19
#define KEYCODE_LEFT_BRACKET 0x1A
#define KEYCODE_RIGHT_BRACKET 0x1B
#define KEYCODE_ENTER 0x1C
#define KEYCODE_LEFT_CTRL 0x1D
#define KEYCODE_A 0x1E
#define KEYCODE_S 0x1F
#define KEYCODE_D 0x20
#define KEYCODE_F 0x21
#define KEYCODE_G 0x22
#define KEYCODE_H 0x23
#define KEYCODE_J 0x24
#define KEYCODE_K 0x25
#define KEYCODE_L 0x26
#define KEYCODE_SEMICOLON 0x27
#define KEYCODE_APOSTROPHE 0x28
#define KEYCODE_GRAVE_ACCENT 0x29
#define KEYCODE_LEFT_SHIFT 0x2A
#define KEYCODE_BACKSLASH 0x2B
#define KEYCODE_Z 0x2C
#define KEYCODE_X 0x2D
#define KEYCODE_V 0x2F
#define KEYCODE_B 0x30
#define KEYCODE_N 0x31
#define KEYCODE_M 0x32
#define KEYCODE_COMMA 0x33
#define KEYCODE_DOT 0x34
#define KEYCODE_FORWARD_SLASH 0x35
#define KEYCODE_RIGHT_SHIFT 0x36
#define KEYCODE_PRINT_SCREEN 0x37
#define KEYCODE_LEFT_ALT 0x38
#define KEYCODE_SPACE 0x39
#define KEYCODE_CAPS_LOCK 0x3A
#define KEYCODE_F1 0x3B
#define KEYCODE_F2 0x3C
#define KEYCODE_F3 0x3D
#define KEYCODE_F4 0x3E
#define KEYCODE_F5 0x3F
#define KEYCODE_F6 0x40
#define KEYCODE_F7 0x41
#define KEYCODE_F8 0x42
#define KEYCODE_F9 0x43
#define KEYCODE_F10 0x44
#define KEYCODE_NUM_LOCK 0x45
#define KEYCODE_SCROLL_LOCK 0x46
#define KEYCODE_HOME 0x47
#define KEYCODE_UP 0x48
#define KEYCODE_PAGE_UP 0x49
#define KEYCODE_MINUS_PAD 0x4A
#define KEYCODE_LEFT_ARROW 0x4B
#define KEYCODE_5_PAD 0x4C
#define KEYCODE_RIGHT_ARROW 0x4D
#define KEYCODE_PLUS_PAD 0x4E
#define KEYCODE_END 0x4F
#define KEYCODE_DOWN_ARROW 0x50
#define KEYCODE_PAGE_DOWN 0x51
#define KEYCODE_INSERT 0x52
#define KEYCODE_DELETE 0x53
#define KEYCODE_LEFT_CTRL_BREAK 0x57
#define KEYCODE_PAUSE 0x5F
#define KEYCODE_RIGHT 0x62
#define KEYCODE_DOWN 0x64
#define KEYCODE_F11 0x66
#define KEYCODE_F12 0x67
#define KEYCODE_LED_NUM_LOCK 0x69
#define KEYCODE_LED_CAPS_LOCK 0x6A
#define KEYCODE_LED_SCROLL_LOCK 0x6B
#define KEYCODE_EXTENDED 0xE0
static uint8_t keyboard_buffer[KEYBOARD_BUFFER_SIZE];
static size_t keyboard_buffer_head = 0;
@ -21,23 +114,59 @@ static size_t keyboard_buffer_tail = 0;
void set_interrupt_vector(uint8_t vector, void (*handler)());
void enable_interrupt(uint8_t vector);
void keyboard_init();
bool keyboard_buffer_empty();
uint8_t keyboard_read_scancode();
uint8_t translate_scancode_to_keycode(uint8_t scancode);
bool keyboard_buffer_full()
{
return (keyboard_buffer_head + 1) % KEYBOARD_BUFFER_SIZE == keyboard_buffer_tail;
}
void KeyboardInterruptHandler()
{
if (!keyboard_buffer_full())
{uint8_t scancode = inb(KEYBOARD_DATA_PORT);
{
uint8_t scancode = inb(KEYBOARD_DATA_PORT);
uint8_t keycode = translate_scancode_to_keycode(scancode);
// Use the keycode for further processing
process_keycode(keycode);
// Or log the keycode for debugging
log_keycode(keycode);
// Add scancode to buffer
keyboard_buffer[keyboard_buffer_head] = scancode;
keyboard_buffer_head = (keyboard_buffer_head + 1) % KEYBOARD_BUFFER_SIZE;
}
}
void process_keycode(uint8_t keycode)
{
// Add your keycode processing logic here
// For example, you could update the system state based on specific key presses
switch(keycode)
{
case KEYCODE_ESC:
// Handle ESC key press
break;
case KEYCODE_ENTER:
// Handle ENTER key press
break;
// Add more cases as needed
}
}
// Example function to log the keycode
void log_keycode(uint8_t keycode)
{
// Add your logging logic here
// For example, you could print the keycode to a debug console or write it to a log file
printf("Keycode pressed: 0x%02X\n", keycode);
}
// Function to translate the combined extended scancode (first byte + second byte)
uint8_t translate_extended_scancode(uint8_t second_scancode)
{
@ -55,7 +184,7 @@ uint8_t translate_extended_scancode(uint8_t second_scancode)
uint8_t translate_scancode_to_keycode(uint8_t scancode)
{
static uint8_t keycode_map[128] = {
static uint8_t keycode_map[256] = {
[0x01] = KEYCODE_ESC,
[0x02] = KEYCODE_1,
[0x03] = KEYCODE_2,
@ -121,7 +250,6 @@ uint8_t translate_scancode_to_keycode(uint8_t scancode)
[0x3F] = KEYCODE_F5,
[0x40] = KEYCODE_F6,
[0x41] = KEYCODE_F7,
[0x41] = KEYCODE_F7,
[0x42] = KEYCODE_F8,
[0x43] = KEYCODE_F9,
[0x44] = KEYCODE_F10,
@ -163,7 +291,7 @@ uint8_t translate_scancode_to_keycode(uint8_t scancode)
[0x68] = KEYCODE_UNKNOWN, // (unused)
[0x69] = KEYCODE_LED_NUM_LOCK, // Num Lock LED status
[0x6A] = KEYCODE_LED_CAPS_LOCK, // Caps Lock LED status
[0x6B] = KEYCODE_LED_SCROLL_LOCK
[0x6B] = KEYCODE_LED_SCROLL_LOCK,
// ... (complete the rest based on the scancode table)
[0xE0] = 0, // Handle extended scancodes (e.g., Print Screen) separately
};

3
src/drivers/keyboard/keyboard.h
View File

@ -14,4 +14,7 @@ void set_interrupt_vector(uint8_t vector, void (*handler)());
void enable_interrupt(uint8_t vector);
uint8_t translate_scancode_to_keycode(uint8_t scancode);
uint8_t translate_extended_scancode(uint8_t second_scancode);
void process_keycode(uint8_t keycode);
void log_keycode(uint8_t keycode);
#endif

32
src/drivers/mouse/mouse.c
View File

@ -1,12 +1,14 @@
#include "mouse.h"
#include "ps2.h"
#include "serial.h"
#include "../io/serial.h"
#include "usb.h"
#include "../io/io.h"
#include <stddef.h>
#include <stdint.h>
#define MOUSE_COM 1
#define PORT_BASE 0x3F8 // Add this if it's not defined elsewhere
void init_mouse(uint16_t com)
{
@ -42,7 +44,7 @@ int mouse_received(uint16_t com)
mouse_data_t read_mouse(uint16_t com)
{
mouse_data_t data;
mouse_data_t data = {0}; // Initialize to zero
if (usb_mouse_detected())
{
@ -54,32 +56,18 @@ mouse_data_t read_mouse(uint16_t com)
}
else
{
data.x = 0;
data.y = 0;
data.buttons = 0;
while (mouse_received(com) == 0)
;
uint8_t status = inb(PORT_BASE + 8 * (com - 1) + 5);
if (status & 0x01)
{
data.buttons |= 0x01;
}
data.buttons = 0;
if (status & 0x01) data.buttons |= 0x01;
if (status & 0x02) data.buttons |= 0x02;
if (status & 0x04) data.buttons |= 0x04;
if (status & 0x02)
{
data.buttons |= 0x02;
}
if (status & 0x04)
{
data.buttons |= 0x04;
}
data.x = inb(PORT_BASE + 8 * (com - 1));
data.y = inb(PORT_BASE + 8 * (com - 1) + 1);
data.x = (int16_t)inb(PORT_BASE + 8 * (com - 1));
data.y = (int16_t)inb(PORT_BASE + 8 * (com - 1) + 1);
}
return data;

1
src/drivers/mouse/mouse.h
View File

@ -9,6 +9,7 @@ typedef struct {
uint8_t buttons;
} mouse_data_t;
void init_mouse(uint16_t com);
int mouse_received(uint16_t com);
mouse_data_t read_mouse(uint16_t com);

36
src/drivers/mouse/ps2.h Normal file
View File

@ -0,0 +1,36 @@
#ifndef PS2_H
#define PS2_H
#include <stdint.h>
#include <stdbool.h>
// PS/2 Controller Ports
#define PS2_DATA_PORT 0x60
#define PS2_STATUS_PORT 0x64
#define PS2_COMMAND_PORT 0x64
// PS/2 Controller Commands
#define PS2_CMD_READ_CONFIG 0x20
#define PS2_CMD_WRITE_CONFIG 0x60
#define PS2_CMD_DISABLE_PORT2 0xA7
#define PS2_CMD_ENABLE_PORT2 0xA8
#define PS2_CMD_TEST_PORT2 0xA9
#define PS2_CMD_TEST_CONTROLLER 0xAA
#define PS2_CMD_TEST_PORT1 0xAB
#define PS2_CMD_DISABLE_PORT1 0xAD
#define PS2_CMD_ENABLE_PORT1 0xAE
// Function prototypes
bool ps2_init(void);
uint8_t ps2_read_data(void);
void ps2_write_data(uint8_t data);
uint8_t ps2_read_status(void);
void ps2_write_command(uint8_t command);
bool ps2_wait_for_read(void);
bool ps2_wait_for_write(void);
// PS/2 device specific functions
bool ps2_keyboard_init(void);
bool ps2_mouse_init(void);
#endif // PS2_H

48
src/drivers/mouse/usb.h Normal file
View File

@ -0,0 +1,48 @@
#ifndef USB_H
#define USB_H
#include <stdint.h>
#include <stdbool.h>
#include "./mouse.h"
// USB Version definitions
#define USB_VERSION_1_0 0x100
#define USB_VERSION_1_1 0x110
#define USB_VERSION_2_0 0x200
#define USB_VERSION_2_1 0x210
// USB device classes
#define USB_CLASS_HID 0x03
// HID subclasses
#define USB_SUBCLASS_BOOT 0x01
// HID protocols
#define USB_PROTOCOL_KEYBOARD 0x01
#define USB_PROTOCOL_MOUSE 0x02
// Function prototypes
mouse_data_t usb_read_mouse(void);
bool usb_mouse_detected(void);
bool usb_mouse_received(void);
bool usb_init(void);
bool usb_detect_version(uint16_t *version);
bool usb_enumerate_devices(void);
// HID device specific functions
bool usb_hid_init(void);
bool usb_keyboard_init(void);
bool usb_mouse_init(void);
// USB transfer functions
bool usb_control_transfer(/* parameters */);
bool usb_interrupt_transfer(/* parameters */);
bool usb_bulk_transfer(/* parameters */);
// USB host controller interface functions
bool uhci_init(void); // USB 1.x
bool ohci_init(void); // USB 1.x
bool ehci_init(void); // USB 2.0
bool xhci_init(void); // USB 3.0+ (for future use)
#endif // USB_H

2
src/filesystem/fat16/fat16.c
View File

@ -1,7 +1,7 @@
#include "fat16.h"
#include <stdint.h>
#include "fat16_io.h"
#include "src/kernel/arch/x86/disk/ata.h"
#include "../../kernel/arch/x86/disk/ata.h"
// Implementation of read_sector and write_sector functions (replace with actual disk I/O)
int read_sector(uint32_t sector_number, void *buffer)
{

2
src/filesystem/fat16/fat16.h
View File

@ -3,7 +3,7 @@
#include <stdint.h>
#include "../../ata.h"
#include "../../kernel/arch/x86/disk/ata.h"
// Define constants for sector size, cluster size, etc. (replace with actual values)
#define SECTOR_SIZE 512

2
src/filesystem/fat16/fat16_io.c
View File

@ -1,6 +1,6 @@
#include "fat16_io.h"
#include <stdint.h>
#include "src/kernel/arch/x86/disk/ata.h"
#include "../../kernel/arch/x86/disk/ata.h"
#include "fat16.h"
// I/O port addresses for IDE controller (replace with actual values if needed)
#define PRIMARY_DATA_REGISTER 0x1F0

2
src/filesystem/fat16/fat16_io.h
View File

@ -3,7 +3,7 @@
#include <stdint.h>
#include "fat16.h"
#include "src/kernel/arch/x86/disk/ata.h"
#include "../../kernel/arch/x86/disk/ata.h"
// I/O port addresses for IDE controller (replace with actual values if needed)
#define PRIMARY_DATA_REGISTER 0x1F0

41
src/gui/README.md Normal file
View File

@ -0,0 +1,41 @@
# GUI
Use QEMU for emulation during development
Implement efficient memory allocation for GUI elements.
Develop drivers and event systems for keyboard and mouse input handling
Choose between bitmap fonts or implement a basic vector font renderer.
Decide on a compositing strategy for overlapping windows.
Implement blitting and compositing in optimized assembly.
Implement performance-critical routines in assembly.
Implement a simple compositing system. Use a z-order list to manage window stacking and redraw only changed areas for efficiency.
the development environment will be in
debian 10 buster with kernel Linux gregbowne 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64 GNU/Linux and gnu 8.3.0 and yes using gcc and nasm
on vscode
Implement basic clipping to improve rendering performance.
Implement double buffering to reduce screen flicker.
Start with simple widgets like buttons and text fields.
Gradually add more complex elements like scrollbars and menus.
Optimize critical paths using inline assembly or full assembly routines.
Implement double buffering to reduce screen flicker.
Use a simple event system for GUI interactions.
Implement modes:
VGA/SVGA Mode
Use VGA mode 13h (320x200, 256 colors) for maximum compatibility.
Implement VESA VBE support for higher resolutions on capable hardware.
Framebuffer
Set up a linear framebuffer in protected mode for more flexible graphics.
Use SIMD operations.

10
src/gui/custom_vga.asm Normal file
View File

@ -0,0 +1,10 @@
section .text
global set_custom_video_mode
set_custom_video_mode:
mov eax, 0x4F01
mov cx, %1
mov dx, 0x000A0000
mov bx, 0x8000
int 0x10
ret

241
src/gui/gui.c
View File

@ -1,3 +1,238 @@
/*
gui goes here
*/
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <stdlib.h>
// Custom OS-specific structures
typedef struct
{
int x, y;
int width, height;
uint32_t color;
void *address; // Address of the frame buffer
int pitch; // Pitch of the frame buffer
} Window;
// Event structure
typedef enum
{
EVENT_KEY_PRESS,
EVENT_MOUSE_MOVE,
// Add more events as needed
} EventType;
typedef struct
{
EventType type;
union
{
struct
{
int key_code;
} key_press;
struct
{
int x, y;
} mouse_move;
// Add more event types as needed
};
} Event;
// Function prototypes
void init_gui(void);
void render_framebuffer(void *fb);
void handle_events(void);
Window *create_window(int x, int y, int width, int height, uint32_t color);
void destroy_window(Window *win);
void update_window(Window *win);
void draw_text(const char *text, int x, int y, uint32_t color);
void draw_button(const char *label, int x, int y, int width, int height, uint32_t color);
void handle_event(Event *ev);
// Global variables
void *framebuffer = NULL;
int fb_pitch = 0;
int fb_fd = -1;
// Custom OS-specific functions
void init_video_mode(void);
void get_framebuffer_info(void);
void set_custom_video_mode(void);
// Helper functions
void print_error(const char *message);
void check_mmap_result(void *ptr, const char *filename);
void check_open_result(int fd, const char *filename);
void check_ioctl_result(int result, const char *func_name);
// Function implementations
void init_gui(void)
{
// Set up graphics mode
init_video_mode();
// Get framebuffer info
get_framebuffer_info();
// Open framebuffer device
fb_fd = open("/dev/fb0", O_RDWR);
if (fb_fd == -1)
{
check_open_result(fb_fd, "/dev/fb0");
}
// Map framebuffer to user space
framebuffer = mmap(NULL, finfo.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fb_fd, 0);
if (framebuffer == MAP_FAILED)
{
check_mmap_result(framebuffer, "/dev/fb0");
}
printf("GUI initialized\n");
}
void render_framebuffer(void *fb)
{
// Implement rendering logic here
// This will depend on how your custom system handles graphics
}
void handle_events(void)
{
// Implement event handling logic here
// This will depend on how your custom system handles input events
}
Window *create_window(int x, int y, int width, int height, uint32_t color)
{
Window *win = malloc(sizeof(Window));
win->x = x;
win->y = y;
win->width = width;
win->height = height;
win->color = color;
win->address = framebuffer;
win->pitch = fb_pitch;
return win;
}
void destroy_window(Window *win)
{
free(win);
}
void update_window(Window *win)
{
// Implement window updating logic here
printf("Updating window %p\n", win);
}
void draw_text(const char *text, int x, int y, uint32_t color)
{
// Implement text drawing logic here
printf("Drawing text at (%d,%d): %s\n", x, y, text);
}
void draw_button(const char *label, int x, int y, int width, int height, uint32_t color)
{
// Implement button drawing logic here
printf("Drawing button at (%d,%d): %s\n", x, y, label);
}
void handle_event(Event *ev)
{
// Implement event handling logic here
printf("Handling event of type %d\n", ev->type);
}
// Assembly code for custom graphics mode setup
static void __attribute__((naked)) set_custom_video_mode(void)
{
// Implement platform-specific video mode setting
// This will depend on your custom system architecture
}
// Helper functions
void print_error(const char *message)
{
fprintf(stderr, "%s\n", message);
exit(1);
}
void check_mmap_result(void *ptr, const char *filename)
{
if (ptr == MAP_FAILED)
{
print_error("Failed to map memory for file: ");
print_error(filename);
}
}
void check_open_result(int fd, const char *filename)
{
if (fd == -1)
{
print_error("Failed to open file: ");
print_error(filename);
}
}
void check_ioctl_result(int result, const char *func_name)
{
if (result != 0)
{
print_error("Failed to execute ioctl call: ");
print_error(func_name);
}
}
// Custom OS-specific functions
void init_video_mode(void)
{
set_custom_video_mode();
}
void get_framebuffer_info(void)
{
// Implement platform-specific framebuffer info retrieval
// This will depend on your custom system architecture
}
void set_custom_video_mode(void)
{
// Implement platform-specific video mode setting
// This will depend on your custom system architecture
}
// Example usage
int main()
{
init_gui();
// Create a window
Window *win = create_window(50, 50, 100, 100, 0xFF0000);
// Draw something
draw_text("Hello, World!", 60, 60);
// Handle events
handle_events();
// Keep the program running
while (1)
{
usleep(10000); // Sleep for 10ms
}
return 0;
}

72
src/gui/gui.h
View File

@ -1,4 +1,70 @@
/*
gui goes here
#ifndef GUI_H
#define GUI_H
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
// Forward declarations
struct Window;
enum EventType;
#define VGA_MODE 0x800x600
#define VGA_WIDTH 640
#define VGA_HEIGHT 480
#define VGA_BPP 32
// Event structure
typedef struct {
enum EventType type;
union {
struct {
int key_code;
} key_press;
struct {
int x, y;
} mouse_move;
// Add more event types as needed
};
} Event;
// Function prototypes
void init_gui(void);
void render_framebuffer(void* fb);
void handle_events(void);
struct Window* create_window(int x, int y, int width, int height, uint32_t color);
void destroy_window(struct Window* win);
void update_window(struct Window* win);
void draw_text(const char* text, int x, int y);
void draw_button(const char* label, int x, int y, uint32_t color);
void handle_event(Event* ev);
// Global variables
extern void* framebuffer;
extern int fb_pitch;
extern int fb_fd;
// Custom OS-specific functions
void init_video_mode(void);
void get_framebuffer_info(void);
void set_custom_video_mode(void);
// Helper functions
void print_error(const char* message);
void check_mmap_result(void* ptr, const char* filename);
void check_open_result(int fd, const char* filename);
void check_ioctl_result(int result, const char* func_name);
// Custom OS-specific structures
typedef struct {
int x, y;
int width, height;
uint32_t color;
void* address; // Address of the frame buffer
int pitch; // Pitch of the frame buffer
} Window;
#endif // GUI_H

21
src/gui/main.c Normal file
View File

@ -0,0 +1,21 @@
#include "gui.h"
int main() {
init_gui();
// Create a window
Window* win = create_window(50, 50, 100, 100, 0xFF0000);
// Draw something
draw_text("Hello, World!", 60, 60, 0xFFFFFF);
// Handle events
handle_events();
// Keep the program running
while (1) {
usleep(10000); // Sleep for 10ms
}
return 0;
}

4
src/kernel/acpi.c
View File

@ -1,6 +1,8 @@
#include "acpi.h"
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#include <string.h>
// Function prototypes (implementations below)
acpi_fadt_t *acpi_find_fadt();
@ -13,7 +15,7 @@ acpi_fadt_t *acpi_find_fadt() {
// Read the RSDP (Root System Description Pointer) signature and checksum
// at the ACPI base address.
acpi_fadt_t *rsdp = (acpi_fadt_t *)ACPI_BASE;
if (rsdp->signature != *(uint32_t *)"RSDT" && rsdp->signature != *(uint32_t *)"XSDT") {
if (memcmp(&rsdp->signature, "RSDT", 4) != 0 && memcmp(&rsdp->signature, "XSDT", 4) != 0) {
return NULL; // Not a valid ACPI signature
}
if (rsdp->checksum != 0) {

4
src/kernel/acpi.h
View File

@ -3,6 +3,10 @@
#include <stdint.h>
#ifndef NULL
#define NULL ((void*)0)
#endif
// ACPI base address (replace with actual value)
#define ACPI_BASE 0xE0000000

15
src/kernel/arch/x86/gdt.asm
View File

@ -2,5 +2,18 @@ global LoadGDT
section .text
LoadGDT:
LGDT [ESP + 32]
/* LGDT [ESP + 32]
RET
*/
mov eax, [esp+4] ; Get the pointer to the GDT pointer structure
lgdt [eax] ; Load the GDT
mov ax, 0x10 ; Set the kernel data segment selector
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax ; Set the kernel stack segment selector
jmp 0x08:.flush ; Flush the instruction cache
.flush:
ret

31
src/kernel/arch/x86/gdt.c
View File

@ -38,8 +38,6 @@ enum GDT_BASE_LIMIT
GDT_LIMIT_MASK = 0xFFFF
};
extern void LoadGDT(struct gdt_ptr* gdt);
// Initialize a GDT entry
void gdt_set_gate(uint32_t num, uint32_t base, uint32_t limit, uint8_t access,
uint8_t gran, struct gdt_entry *const gdt)
@ -54,13 +52,11 @@ void gdt_set_gate(uint32_t num, uint32_t base, uint32_t limit, uint8_t access,
gdt[num].access = access;
}
void gdt_init()
extern bool gdt_init(void)
{
// Set up GDT pointer
struct gdt_ptr gp;
gp.limit = (sizeof(struct gdt_entry) * 3) - 1;
//gdt = (struct gdt_entry *)malloc(sizeof(struct gdt_entry) * 3);
//memset(gdt, 0, sizeof(struct gdt_entry) * 3);
// Initialize GDT entries
gdt_set_gate(0, 0, 0, 0, 0, &gdt_entries[0]); // Null segment
@ -70,19 +66,24 @@ void gdt_init()
// Load GDT
struct gdt_ptr gdtp;
gdtp.limit = gp.limit;
gdtp.base = (uintptr_t)gdt;
gdtp.base = (uint32_t)&gdt_entries[0];
LoadGDT(&gdtp);
/*
__asm__ volatile("mov $0x10, %ax\n\t"
"mov %ax, %ds\n\t"
"mov %ax, %es\n\t"
"mov %ax, %fs\n\t"
"mov %ax, %gs\n\t"
"ljmp $0x08, $next_label\n\t"
"next_label:");
*/
// Switch to protected mode
__asm__ volatile(
"cli\n\t" // Disable interrupts
"mov %[base], %%eax\n\t" // Move the base address of the GDT to eax
"mov %[limit], %%ebx\n\t" // Move the limit of the GDT to ebx
"shl $16, %%ebx\n\t" // Shift left 16 bits to get the full 32-bit value
"or %%eax, %%ebx\n\t" // Combine the base and limit
"mov %[address], %%ecx\n\t" // Move the address of gdtr to ecx
"mov %%ebx, (%[address])\n\t" // Store the combined value at gdtr
"lgdt (%[address])\n\t" // Load the GDT
"sti\n\t" // Enable interrupts
:
: [base] "a"(gdtp.base), [limit] "b"(gdtp.limit), [address] "c"(&gdtp)
: "%ebx", "%ecx", "%edx");
}
// Exception handlers

15
src/kernel/arch/x86/gdt.h
View File

@ -1,8 +1,8 @@
// gdt.h
#ifndef GDT_H
#define GDT_H
#include <stdint.h>
#include <stdbool.h>
// GDT entry structure
struct gdt_entry
@ -10,9 +10,8 @@ struct gdt_entry
uint16_t limit_low; // The lower 16 bits of the limit
uint16_t base_low; // The lower 16 bits of the base
uint8_t base_middle; // The next 8 bits of the base
uint8_t
access; // Access flags, determine what ring this segment can be used in
uint8_t granularity;
uint8_t access; // Access flags, determine what ring this segment can be used in
uint8_t granularity; // Granularity
uint8_t base_high; // The last 8 bits of the base
} __attribute__((packed));
@ -23,7 +22,9 @@ struct gdt_ptr
uint32_t base; // The address of the first gdt_entry_t struct
} __attribute__((packed));
// Initialize the GDT
void gdt_init();
// Function prototypes
extern bool gdt_init(void);
extern bool init_gdt(void);
void LoadGDT(struct gdt_ptr *gdt); // External declaration of LoadGDT
#endif
#endif // GDT_H

25
src/kernel/arch/x86/idt.c
View File

@ -13,20 +13,35 @@ void TimerInterruptHandler()
timer_count++;
}
union interrupt_handler_union {
void (*handler)();
struct {
uint16_t low;
uint16_t high;
} parts;
};
// Initialize the IDT
void InitializeIDT()
bool InitializeIDT()
{
idt[KEYBOARD_INTERRUPT].base_lo = ((uint16_t *)KeyboardInterruptHandler)[0];
union interrupt_handler_union keyboard_handler;
keyboard_handler.handler = KeyboardInterruptHandler;
idt[KEYBOARD_INTERRUPT].base_lo = keyboard_handler.parts.low;
idt[KEYBOARD_INTERRUPT].sel = 0x08;
idt[KEYBOARD_INTERRUPT].always0 = 0x00;
idt[KEYBOARD_INTERRUPT].flags = 0x8E;
idt[KEYBOARD_INTERRUPT].base_hi = ((uint16_t *)KeyboardInterruptHandler)[1];
idt[KEYBOARD_INTERRUPT].base_hi = keyboard_handler.parts.high;
idt[0x33].base_lo = (uint16_t)TimerInterruptHandler;
union interrupt_handler_union timer_handler;
timer_handler.handler = TimerInterruptHandler;
idt[0x33].base_lo = timer_handler.parts.low;
idt[0x33].sel = 0x08;
idt[0x33].always0 = 0x00;
idt[0x33].flags = 0x8E;
idt[0x33].base_hi = (uint16_t)TimerInterruptHandler >> 16;
idt[0x33].base_hi = timer_handler.parts.high;
LoadIDT(&idt[0]);
return true; // Assuming initialization always succeeds
}

16
src/kernel/arch/x86/idt.h
View File

@ -2,6 +2,7 @@
#define IDT_H
#include "include/types.h"
#include <stdbool.h>
#define IDT_ENTRY_SIZE 16
@ -9,6 +10,16 @@
#error "idt_entry structure size mismatch!"
#endif
struct idt_regs {
uint16_t cs;
uint16_t ip;
uint32_t flags;
uint32_t esp;
uint16_t ss;
uint16_t eip;
uint32_t cr2;
};
// IDT entry structure
struct idt_entry
{
@ -22,11 +33,14 @@ struct idt_entry
extern struct idt_entry idt[256];
// Initialize the IDT
void InitializeIDT();
bool InitializeIDT();
extern void KeyboardInterruptHandler();
extern void TimerInterruptHandler();
extern void LoadIDT(struct idt_entry *entry);
void divide_error(struct idt_regs *regs);
void page_fault(struct idt_regs *regs);
#endif /* IDT_H */

12
src/kernel/arch/x86/include/memory.h
View File

@ -10,4 +10,16 @@ void kfree(void *ptr);
void *malloc(size_t size); // Adding malloc and free declarations
void free(void *ptr);
extern char KERNEL_HEAP_START;
extern char KERNEL_HEAP_END;
// User heap boundaries
extern char USER_HEAP_START;
extern char USER_HEAP_END;
extern char _kernel_heap_start; // Defined by the linker script
#define KERNEL_HEAP_START (&_kernel_heap_start)
#define KERNEL_HEAP_END (KERNEL_HEAP_START + 0x100000) // Adjust the size as needed
#endif /* MEMORY_H */

34
src/kernel/arch/x86/include/types.c
View File

@ -1,19 +1,21 @@
#include "./types.h"
#include <stdint.h>
#include "types.h"
void gdt_set_entry(gdt_entry_t *entry, uint32_t base, uint32_t limit,
uint16_t flags)
{
entry->base = base;
entry->limit = limit;
entry->flags = flags;
}
void idt_set_entry(idt_entry_t *entry, uint32_t base, uint16_t selector,
uint16_t flags)
{
// Utility function to set a GDT entry
void gdt_set_entry(gdt_entry_t *entry, uint32_t base, uint32_t limit, uint8_t access, uint8_t flags) {
entry->limit_low = limit & 0xFFFF;
entry->base_low = base & 0xFFFF;
entry->base_high = (base >> 16) & 0xFFFF;
entry->selector = selector;
entry->flags = flags;
entry->base_middle = (base >> 16) & 0xFF;
entry->access = access;
entry->limit_high = (limit >> 16) & 0x0F;
entry->flags = flags & 0x0F;
entry->base_high = (base >> 24) & 0xFF;
}
// Utility function to set an IDT entry
void idt_set_entry(idt_entry_t *entry, uint32_t base, uint16_t selector, uint16_t flags) {
entry->offset_low = base & 0xFFFF;
entry->segment = selector;
entry->reserved = 0;
entry->flags = flags;
entry->offset_high = (base >> 16) & 0xFFFF;
}

40
src/kernel/arch/x86/include/types.h
View File

@ -1,24 +1,34 @@
#ifndef TYPES_H
#define TYPES_H
#include <stdint.h>
// Basic integer types
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef struct
{
uint32_t base;
uint32_t limit;
uint16_t flags;
} gdt_entry_t;
// Attribute for packed structures
#define PACKED_ATTRIBUTE __attribute__((packed))
typedef struct
{
uint16_t base_low;
uint16_t selector;
uint8_t zero;
uint8_t flags;
uint16_t base_high;
} __attribute__((packed)) idt_entry_t;
// Structure for GDT entries
typedef struct {
uint16_t limit_low; // Limit lower 16 bits
uint16_t base_low; // Base address lower 16 bits
uint8_t base_middle; // Base address middle 8 bits
uint8_t access; // Access flags
uint8_t limit_high : 4; // Limit upper 4 bits
uint8_t flags : 4; // Flags (4 bits)
uint8_t base_high; // Base address upper 8 bits
} PACKED_ATTRIBUTE gdt_entry_t;
#endif /* TYPES_H */
// Structure for IDT entries
typedef struct {
uint16_t offset_low; // Offset lower 16 bits
uint16_t segment; // Segment selector
uint8_t reserved; // Reserved
uint8_t flags; // Flags
uint16_t offset_high; // Offset upper 16 bits
} PACKED_ATTRIBUTE idt_entry_t;
#endif // TYPES_H

13
src/kernel/arch/x86/isr/exceptions.c
View File

@ -9,7 +9,7 @@
#define PAGE_SIZE 4096
typedef struct memory_region_t
{
void *start_address;
uintptr_t start_address; // Changed from void* to uintptr_t
size_t size;
} memory_region_t;
@ -19,6 +19,9 @@ size_t num_allocated_regions;
jmp_buf page_fault_buffer;
extern memory_region_t *allocated_regions;
extern size_t num_allocated_regions;
void DivideByZero()
{
// Add logic to handle Divide By Zero Exception
@ -47,12 +50,14 @@ void DoubleFault()
}
// Function to check if address is within allocated memory (example)
int IsAddressInRange(uint16_t address)
int IsAddressInRange(uintptr_t address) // Changed from uint16_t to uintptr_t
{
for (size_t i = 0; i < num_allocated_regions; ++i)
{
if ((address >= allocated_regions[i].start_address) &&
(address < (allocated_regions[i].start_address + allocated_regions[i].size)))
uintptr_t region_start = allocated_regions[i].start_address;
uintptr_t region_end = region_start + allocated_regions[i].size;
if (address >= region_start && address < region_end)
{
return 1;
}

5
src/kernel/arch/x86/isr/exceptions.h
View File

@ -1,11 +1,14 @@
#ifndef EXCEPTIONS_H
#define EXCEPTIONS_H
#include <stddef.h>
#include <stdint.h>
void DivideByZero();
void DoubleFault();
void PageFault();
void PageFault(uint16_t fault_address);
void GeneralProtectionFault();

34
src/kernel/arch/x86/isr/isr.c
View File

@ -1,20 +1,36 @@
#include "isr.h"
#include <stdbool.h>
#include <stdio.h>
static bool initialized = false;
// Declaration of save_state()
void save_state(void);
// Declaration of kernel_panic_or_recover()
void kernel_panic_or_recover(void);
void isr_handler(struct isr_regs regs) {
if (!initialized) {
// Initialization logic
printf("Initializing ISR...\n");
// Clear all interrupt flags
clear_interrupt(DIVIDE_BY_ZERO_INTERRUPT);
clear_interrupt(DOUBLE_FAULT_INTERRUPT);
clear_interrupt(PAGE_FAULT_INTERRUPT);
clear_interrupt(GENERAL_PROTECTION_FAULT_INTERRUPT);
initialized = true;
}
switch(regs.int_no) {
case DIVIDE_BY_ZERO_INTERRUPT:
// Handle Divide By Zero Interrupt
printf("Divide by zero error occurred!\n");
save_state();
kernel_panic_or_recover();
break;
case DOUBLE_FAULT_INTERRUPT:
// Handle Double Fault Interrupt
break;
case PAGE_FAULT_INTERRUPT:
// Handle Page Fault Interrupt
break;
case GENERAL_PROTECTION_FAULT_INTERRUPT:
// Handle General Protection Fault Interrupt
break;
// Add cases for other interrupts...
default:
// Handle other interrupts or implement error handling
break;

34
src/kernel/arch/x86/isr/isr.h
View File

@ -2,15 +2,14 @@
#define ISR_H
#include "../include/types.h"
#include <stdio.h>
enum ISR_Vector
{
EXCEPTION_START = 0x00,
DIVIDE_BY_ZERO_INTERRUPT = 0x00,
DOUBLE_FAULT_INTERRUPT = 0x08,
PAGE_FAULT_INTERRUPT = 0x0E,
GENERAL_PROTECTION_FAULT_INTERRUPT = 0x0D,
DIVIDE_BY_ZERO_INTERRUPT = 0x0,
DOUBLE_FAULT_INTERRUPT = 0x8,
PAGE_FAULT_INTERRUPT = 0xE,
GENERAL_PROTECTION_FAULT_INTERRUPT = 0xD,
EXCEPTION_END = 0x1F,
HARDWARE_START = 0x20,
TIMER_INTERRUPT = 0x20,
@ -28,23 +27,18 @@ struct isr_regs
uint32_t gs, fs, es, ds; // Segment selectors
uint32_t edi, esi, ebp, esp; // Pushed by pusha instruction
uint32_t ebx, edx, ecx, eax; // Pushed by the interrupt handler
uint32_t int_no,
err_code; // Interrupt number and error code (if applicable)
uint32_t eip, cs, eflags,
esp_at_signal; // Pushed by the processor automatically
uint32_t int_no, err_code; // Interrupt number and error code (if applicable)
uint32_t eip, cs, eflags, esp_at_signal; // Pushed by the processor automatically
};
void isr_handler(struct isr_regs regs);
// Structure for storing register values during an ISR
struct idt_regs
void clear_interrupt(uint32_t interrupt_id)
{
uint32_t ds; // Data segment selector
uint32_t edi, esi, ebp, esp, ebx, edx, ecx,
eax; // Pushed by pusha instruction
uint32_t int_no,
err_code; // Interrupt number and error code (if applicable)
uint32_t eip, cs, eflags, useresp,
ss; // Pushed by the processor automatically
};
// Assuming interrupt_id maps to a specific bit in an interrupt control register
// For example, if DIVIDE_BY_ZERO_INTERRUPT corresponds to bit 0 in a register at address 0x12345678
uint32_t *interrupt_control_register = (uint32_t *)0x12345678;
*interrupt_control_register &= ~(1 << interrupt_id);
}
extern void isr_handler(struct isr_regs regs);
#endif /* ISR_H */

213
src/kernel/kernel.c
View File

@ -1,93 +1,162 @@
#include "kernel.h"
#include "./arch/x86/gdt.h"
#include "../kernel/malloc/malloc.h"
#include "../kernel/malloc/kmalloc.h"
#include "../kernel/malloc/malloc.h"
#include "./arch/x86/gdt.h"
#include "./arch/x86/idt.h"
#include "./arch/x86/include/memory.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#define VGA_ADDRESS 0xB8000
#define VGA_WIDTH 80
#define VGA_HEIGHT 25
#define VGA_COLOR_BLACK 0x0
#define VGA_COLOR_WHITE 0xF
// Debug levels
typedef enum
{
DEBUG_BASIC = 1,
DEBUG_DETAILED = 2
} debug_level_t;
uint16_t* const VGA_MEMORY = (uint16_t*) VGA_ADDRESS;
// Error codes
typedef enum
{
ERR_GDT_INIT = 1,
ERR_IDT_INIT,
ERR_KERNEL_HEAP_INIT,
ERR_USER_HEAP_INIT
} error_code_t;
void clear_screen() {
for (int i = 0; i < VGA_WIDTH * VGA_HEIGHT; i++) {
VGA_MEMORY[i] = ((uint16_t)VGA_COLOR_BLACK << 8) | ' ';
#define USER_HEAP_START ((uintptr_t)0x10000000) // Example address
#define USER_HEAP_END ((uintptr_t)0x20000000) // Example address
// Function prototypes
static void log_message(const char *message, debug_level_t level);
bool init_gdt();
bool initialize_idt(void);
int init_kernel_heap(void *start, void *end);
int init_user_heap(void *start, void *end);
static void kernel_panic(const char *message, int error_code);
extern bool (*gdt_init_ptr)(void) = (bool (*)(void))gdt_init;
debug_level_t DEBUG_LEVEL = DEBUG_BASIC;
static void log_message(const char *message, debug_level_t level)
{
if (level <= DEBUG_LEVEL)
{
printf("[LOG] %s\n", message);
}
}
void print(const char* message) {
static int row = 0;
static int col = 0;
for (size_t i = 0; message[i] != '\0'; i++) {
if (col >= VGA_WIDTH || message[i] == '\n') {
row++;
col = 0;
extern bool gdt_init(void)
{
log_message("Initializing GDT...", 1);
if (!init_gdt())
{
log_message("Failed to initialize GDT!", 2);
return false;
}
if (row >= VGA_HEIGHT) {
clear_screen();
row = 0;
}
if (message[i] != '\n') {
VGA_MEMORY[row * VGA_WIDTH + col] = ((uint16_t)VGA_COLOR_WHITE << 8) | message[i];
col++;
log_message("GDT initialized successfully.", 1);
return true;
}
bool init_gdt()
{
// Implementation of init_gdt()
// This is just a placeholder, you'll need to implement the actual GDT initialization logic
return true;
}
bool initialize_idt(void)
{
// Implement your IDT initialization logic here
// This is just a placeholder implementation
log_message("Initializing IDT...", DEBUG_DETAILED);
// Your IDT initialization code goes here
// For example:
// - Set up IDT entries
// - Load the IDT using lidt instruction
// For now, let's assume it always succeeds
return true;
}
bool InitializeIDT()
{
log_message("Initializing IDT...", 1);
if (!initialize_idt())
{
log_message("Failed to initialize IDT!", 2);
return false;
}
log_message("IDT initialized successfully.", 1);
return true;
}
int init_kernel_heap(void *start, void *end)
{
log_message("Initializing kernel heap...", 1);
// Implementation here
// For now, let's assume it always succeeds
log_message("Kernel heap initialized successfully.", 1);
return 0; // Return 0 for success
}
int init_user_heap(void *start, void *end)
{
log_message("Initializing user heap...", 1);
// Implementation here
// For now, let's assume it always succeeds
log_message("User heap initialized successfully.", 1);
return 0; // Return 0 for success
}
static void kernel_panic(const char *message, int error_code)
{
printf("KERNEL PANIC: %s (Error code: %d)\n", message, error_code);
// Implement any necessary error handling or system halt procedures
while (1)
{ /* Halt the system */
}
}
void init_memory_management() {
// Placeholder for actual implementation
}
int main()
{
log_message("Starting kernel initialization...", 1);
void init_devices() {
// Placeholder for actual implementation
}
void early_init() {
// ... other early initialization tasks
init_kernel_heap((void*)KERNEL_HEAP_START, (void*)KERNEL_HEAP_END);
// Initialize GDT
gdt_init();
}
void kernel_main() {
clear_screen();
print("Welcome to ClassicOS!");
// Initialize memory management
init_memory_management();
// Initialize user-space heap (example)
void* user_heap_start = /* address of user-space heap start */;
void* user_heap_end = /* address of user-space heap end */;
init_heap(user_heap_start, user_heap_end);
// Initialize kernel heap (example)
void* kernel_heap_start = /* address of kernel heap start */;
void* kernel_heap_end = /* address of kernel heap end */;
init_kernel_heap(kernel_heap_start, kernel_heap_end);
// Initialize devices
init_devices();
// Infinite loop to keep the kernel running
while (1) {
// Handle any pending interrupts
handle_interrupts();
// Schedule the next process to run
schedule_next_process();
// Perform deferred work from interrupts or system calls
process_deferred_work();
// Handle system calls from user-space applications
handle_system_calls();
if (!gdt_init())
{
log_message("Initialization failed - exiting.", 2);
return 1;
}
if (!InitializeIDT())
{
log_message("Initialization failed - exiting.", 2);
return 1;
}
if (init_kernel_heap((void *)KERNEL_HEAP_START, (void *)KERNEL_HEAP_END) != 0)
{
log_message("Kernel heap initialization failed - exiting.", 2);
return 1;
}
if (init_user_heap((void* )USER_HEAP_START, (void* )USER_HEAP_END) != 0)
{
log_message("User heap initialization failed - exiting.", 2);
return 1;
}
log_message("Kernel initialization completed successfully.", 1);
// Enter the main kernel loop or start the shell
while (1)
{
// Kernel loop or shell code
}
return 0;
}

5
src/kernel/kernel.h
View File

@ -1,4 +1,9 @@
#ifndef KERNEL_H
#define KERNEL_H
#include "kernel.h"
extern void* kernel_heap_start;
extern void* kernel_heap_end;
#endif

7
src/kernel/linker.ld
View File

@ -7,6 +7,13 @@ PHDRS {
}
SECTIONS {
.kernelheap (0x100000) : /* Assuming kernel heap starts at 1MB */
{
_kernel_heap_start = .; /* Define symbol at the start of the section */
*(kernel.o) /* Include kernel object file in this section */
}
. = 0xC0000000; /* Starting virtual address */
/* Text Section */

158
src/kernel/malloc/kmalloc.c
View File

@ -1,4 +1,13 @@
#include "kmalloc.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define HEAP_MAGIC 0x123456789ABCDEF0
static void *kernel_heap_start; // Start of the kernel heap
static void *kernel_heap_end; // End of the kernel heap
@ -10,6 +19,17 @@ struct memory_block
struct memory_block *next;
};
typedef struct
{
size_t size;
bool is_free;
uint64_t magic; // For integrity checking
} block_meta_t;
static void *heap_start;
static void *heap_end;
static block_meta_t *free_list;
void mark_as_used_kernel(void *ptr, size_t size)
{
// Since we're using a linked list, there's no specific action needed
@ -34,17 +54,96 @@ void mark_as_free_kernel(void *ptr)
free_blocks = block;
}
void init_kernel_heap(void *start, void *end)
int init_kernel_heap(void *start, void *end)
{
kernel_heap_start = start;
kernel_heap_end = end;
if (start >= end)
{
return -1; // Invalid range
}
free_blocks = (struct memory_block *)start;
free_blocks->size = (size_t)(end - start);
free_blocks->next = NULL;
heap_start = start;
heap_end = end;
size_t total_size = (char *)end - (char *)start;
// You'll need to replace this placeholder with logic to split the
// initial block into smaller ones based on your requirements.
if (total_size < sizeof(block_meta_t))
{
return -2; // Heap too small
}
// Initialize the first block
block_meta_t *first_block = (block_meta_t *)start;
first_block->size = total_size - sizeof(block_meta_t);
first_block->is_free = true;
first_block->magic = HEAP_MAGIC;
// Initialize the free list with the first block
free_list = first_block;
return 0; // Success
}
void *kmalloc(size_t size)
{
block_meta_t *current = free_list;
while (current) {
if (current->magic != HEAP_MAGIC) {
// Heap corruption detected
return NULL;
}
if (current->is_free && current->size >= size) {
// Found a suitable block
if (current->size > size + sizeof(block_meta_t)) {
// Split the block
block_meta_t *new_block = (block_meta_t*)((char*)current + sizeof(block_meta_t) + size);
new_block->size = current->size - size - sizeof(block_meta_t);
new_block->is_free = true;
new_block->magic = HEAP_MAGIC;
current->size = size;
}
current->is_free = false;
return (void*)((char*)current + sizeof(block_meta_t));
}
current = (block_meta_t*)((char*)current + sizeof(block_meta_t) + current->size);
if ((void*)current >= heap_end) {
break; // Reached end of heap
}
}
// No suitable block found
return NULL;
}
void kfree(void *ptr)
{
if (!ptr)
{
return;
}
block_meta_t *block_meta = (block_meta_t *)((char *)ptr - sizeof(block_meta_t));
if (block_meta->magic != HEAP_MAGIC)
{
// Invalid free or heap corruption
return;
}
block_meta->is_free = true;
// Coalesce with next block if it's free
block_meta_t *next_block = (block_meta_t *)((char *)block_meta + sizeof(block_meta_t) + block_meta->size);
if ((void *)next_block < heap_end && next_block->is_free)
{
block_meta->size += sizeof(block_meta_t) + next_block->size;
}
// TODO: Implement coalescing with previous block
}
void *find_free_kernel_block(size_t size)
@ -63,46 +162,3 @@ void *find_free_kernel_block(size_t size)
// No suitable block found
return NULL;
}
void *kmalloc(size_t size)
{
if (kernel_heap_start == NULL || kernel_heap_end == NULL)
{
// Kernel heap not initialized, cannot allocate
return NULL;
}
// Align the size to the word size for efficiency
size += sizeof(size_t) - 1;
size &= ~(sizeof(size_t) - 1);
// Search for a free block of sufficient size
void *block = find_free_kernel_block(size);
if (block != NULL)
{
// Mark the block as used
mark_as_used_kernel(block, size);
// This is a placeholder for splitting the block if necessary
// You'll need to implement logic to potentially split the block
// into a used part of size 'size' and a remaining free block
// if the block size is significantly larger than 'size'.
return block;
}
// No suitable block found, out of memory
return NULL;
}
void kfree(void *ptr)
{
if (ptr == NULL)
{
return;
}
// Mark the block as free
// This is a placeholder for the actual algorithm
mark_as_free_kernel(ptr);
}

4
src/kernel/malloc/kmalloc.h
View File

@ -12,8 +12,8 @@ typedef struct {
} heap_block_t;
// Function prototypes
void init_kernel_heap(void* start, void* end);
void init_user_heap(void* start, void* end);
int init_kernel_heap(void* start, void* end);
int init_user_heap(void* start, void *end);
void* kmalloc(size_t size);
void kfree(void* ptr);

53
src/kernel/malloc/malloc.c
View File

@ -1,29 +1,63 @@
#include "malloc.h"
#include <stdint.h> // For uintptr_t
static void *heap_start; // Start of the heap
static void *heap_end; // End of the heap
static struct memory_block *free_blocks; // List of free blocks
void init_heap(void *start, void *end)
{
heap_start = start;
heap_end = end;
// Initialize the heap here
// Initialize the heap with a single large free block
free_blocks = (struct memory_block *)start;
free_blocks->size = (uintptr_t)end - (uintptr_t)start - sizeof(struct memory_block);
free_blocks->next = NULL;
free_blocks->is_free = 1;
}
void *find_free_block(size_t size) {
// Implementation is similar to find_free_kernel_block
struct memory_block *current = free_blocks;
while (current != NULL) {
if (current->size >= size) {
if (current->is_free && current->size >= size) {
return current;
}
current = current->next;
}
// No suitable block found
return NULL;
}
void mark_as_used(void *ptr, size_t size) {
struct memory_block *block = (struct memory_block *)ptr;
block->is_free = 0;
// If the block is larger than needed, split it
if (block->size > size + sizeof(struct memory_block)) {
struct memory_block *new_block = (struct memory_block *)((uintptr_t)ptr + size + sizeof(struct memory_block));
new_block->size = block->size - size - sizeof(struct memory_block);
new_block->next = block->next;
new_block->is_free = 1;
block->size = size;
block->next = new_block;
}
}
void mark_as_free(void *ptr) {
struct memory_block *block = (struct memory_block *)ptr;
block->is_free = 1;
// Coalesce with next block if it's free
if (block->next && block->next->is_free) {
block->size += block->next->size + sizeof(struct memory_block);
block->next = block->next->next;
}
// TODO: Implement coalescing with previous block
}
void *malloc(size_t size)
{
if (heap_start == NULL || heap_end == NULL)
@ -33,16 +67,15 @@ void *malloc(size_t size)
}
// Align the size to the word size for efficiency
size &= ~(sizeof(size_t) - 1);
size = (size + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1);
// Search for a free block of sufficient size
// This is a placeholder for the actual algorithm
void *block = find_free_block(size);
if (block != NULL)
{
// Mark the block as used
mark_as_used(block, size);
return block;
return (void *)((uintptr_t)block + sizeof(struct memory_block));
}
// No suitable block found, out of memory
@ -56,7 +89,9 @@ void free(void *ptr)
return;
}
// Adjust pointer to the start of the memory block
struct memory_block *block = (struct memory_block *)((uintptr_t)ptr - sizeof(struct memory_block));
// Mark the block as free
// This is a placeholder for the actual algorithm
mark_as_free(ptr);
mark_as_free(block);
}

16
src/kernel/malloc/malloc.h
View File

@ -3,9 +3,25 @@
#include <stddef.h> // For size_t
// Define the memory block structure
struct memory_block {
size_t size;
struct memory_block *next;
int is_free;
};
// Function prototypes
void init_heap(void *start, void *end);
void *malloc(size_t size);
void free(void *ptr);
// Helper function prototypes
void *find_free_block(size_t size);
void mark_as_used(void *ptr, size_t size);
void mark_as_free(void *ptr);
// External heap boundaries
extern void *user_heap_start;
extern void *user_heap_end;
#endif // MALLOC_H

2
src/kernel/timer.c
View File

@ -3,7 +3,7 @@
// Function to send a byte to an I/O port
void outb(uint16_t port, uint8_t data) {
__asm__ volatile ("outb %b, %w" : : "a" (data), "d" (port));
__asm__ volatile ("outb %0, %1" : : "a" (data), "Nd" (port));
}
// Function to initialize the timer with a desired frequency

7
src/kernel/timer.h
View File

@ -1,10 +1,3 @@
Here's a breakdown of how to create timer.c and timer.h compatible with the 8253 for x86 32-bit protected mode on 386/486 processors:
1. timer.h:
This header file will contain function prototypes, constants, and any data structures you might need for interacting with the 8253 timer. Here's an example:
C
#ifndef TIMER_H
#define TIMER_H