72 lines
1 KiB
PHP
72 lines
1 KiB
PHP
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struc BootInfoRange {
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.base dd ?
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.legth dd ?
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}
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struc BootInfo {
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.mmap dd 4*2*40 dup(0)
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}
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BOOTINFO_MEMORY_LIMIT = 0xFFFFF000
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;; Function: boot_info_add_memmap
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;;
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;; In:
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;; EAX - base
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;; EDX - length
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;;
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boot_info_add_memmap:
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cmp eax, BOOTINFO_MEMORY_LIMIT
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jbe @f
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ret
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@@:
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mov ecx, BOOTINFO_MEMORY_LIMIT
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sub ecx, edx
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cmp eax, ecx
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jbe @f
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ret
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@@:
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push ebx
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xor ecx, ecx
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.loop:
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mov ebx, [boot_structure.mmap + ecx * 8 + 4]
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or ebx, ebx
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jnz @f
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mov [boot_structure.mmap + ecx * 8], eax
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mov [boot_structure.mmap + ecx * 8 + 4], edx
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jmp .end
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@@:
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inc ecx
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cmp ecx, 40
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jne .loop
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.end:
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pop ebx
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ret
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;; Function: boot_info_print_mmap
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boot_info_print_mmap:
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xchg bx, bx
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xor ecx, ecx
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.loop:
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mov eax, [boot_structure.mmap + ecx * 8 + 4]
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or eax, eax
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jz @f
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push ecx
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push dword [boot_structure.mmap + ecx * 8 + 4]
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push dword [boot_structure.mmap + ecx * 8]
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mov si, szMsgMemMap
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call bios_log
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pop ecx
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xchg bx, bx
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@@:
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inc ecx
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cmp ecx, 40
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jbe .loop
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ret
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szMsgMemMap db 'Address: %x - Length: %x'
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