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| author | Loic Guegan <manzerbredes@mailbox.org> | 2021-04-08 13:07:17 +0200 |
|---|---|---|
| committer | Loic Guegan <manzerbredes@mailbox.org> | 2021-04-08 13:07:17 +0200 |
| commit | 958e2dae042ca9e28f23e509d541730f30fa8502 (patch) | |
| tree | 8911572335763866ed39cc7ec7855131929a0994 /src/boot/boot.S | |
| parent | db553d05824ae463752c8b528feac963e41d9f1c (diff) | |
Switch to multiboot2 and improve interrupt management
Diffstat (limited to 'src/boot/boot.S')
| -rw-r--r-- | src/boot/boot.S | 67 |
1 files changed, 44 insertions, 23 deletions
diff --git a/src/boot/boot.S b/src/boot/boot.S index e3830eb..469cc82 100644 --- a/src/boot/boot.S +++ b/src/boot/boot.S @@ -1,29 +1,50 @@ +.globl _start +.globl MB_INFO .extern bringelle .extern gdt_memcpy -.globl _start -.text - -.set MB_MAGIC, 0x1BADB002 -.set MB_FLAGS, 0x00010000 -.set MB_CHECKSUM, -(MB_MAGIC+MB_FLAGS) -.set MB_HEADER_ADDR, mb_header -.set MB_LOAD_ADDR, mb_header -.set MB_LOAD_END_ADDR, 0x0 -.set MB_BSS_END_ADDR, 0x0 -.set MB_ENTRY_ADDR, _start - -mb_header: -.align 4 -.long MB_MAGIC -.long MB_FLAGS -.long MB_CHECKSUM -.long MB_HEADER_ADDR -.long MB_LOAD_ADDR -.long MB_LOAD_END_ADDR -.long MB_BSS_END_ADDR -.long MB_ENTRY_ADDR +.extern mb_load_fb_tag + +.section .multiboot + +.set MB_MAGIC, 0xE85250D6 +.set MB_ARCH, 0x00000000 +.set MB_HEADER_LENGTH, (mb_header_end-mb_header_start) +.set MB_CHECKSUM, -(MB_MAGIC+MB_ARCH+MB_HEADER_LENGTH) + +mb_header_start: +.align 8 +.int MB_MAGIC +.int MB_ARCH +.int MB_HEADER_LENGTH +.int MB_CHECKSUM +# ----------- Address tag +.align 8 +.short 2 +.short 0 # Not optional +.int 24 # Size +.int mb_header_start # header_addr +.int mb_header_start # load_addr +.int 0x0 # load_end_addr +.int 0x0 # bss_end_addr +# ----------- Addr tag +.align 8 +.short 0x3 +.short 0 +.int 12 +.int _start +# ----------- End tag +.align 8 +.int 0x0 +.int 0x8 +mb_header_end: + +.section .text + +MB_INFO: + .int 0xABCDEF # Will contains the Multiboot2 information data structure address _start: +mov %ebx, (MB_INFO) # Copy GDT into memory then load its register call gdt_memcpy @@ -44,7 +65,7 @@ cs_new: # Update stack segment movw $0x18, %ax movw %ax, %ss -movl $0x20000,%esp +movl $0x50000,%esp # Start kernel main function call bringelle |