80 lines
1.8 KiB
ArmAsm
80 lines
1.8 KiB
ArmAsm
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// vim: ft=gas:et:sw=12:ts=12:sts=12
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.include "src/mode.S"
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.global bios_write
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.code32
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bios_write: push %ebp
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mov %esp, %ebp
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push %ebx
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mov 8+0(%ebp), %edx
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mov 8+4(%ebp), %ecx
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PROT16
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REAL
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.bwloop: test %ecx, %ecx
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jz .bwreturn
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xor %bx, %bx
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mov $0x0E, %ah
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mov (%edx), %al
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push %ecx
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push %edx
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int $0x10
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pop %edx
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pop %ecx
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add $1, %edx
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sub $1, %ecx
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jmp .bwloop
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.bwreturn: PROT
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PROT32
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pop %ebx
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mov %ebp, %esp
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pop %ebp
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ret
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.global bios_getmap
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.code32
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bios_getmap:push %ebp
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mov %esp, %ebp
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push %ebx
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push %edi
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mov 8+0(%ebp), %edi
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PROT16
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REAL
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xor %ebx, %ebx
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_gmnext: movl $0, 20(%di)
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mov $0x534D4150, %edx // e820 magic number
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mov $24, %ecx
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mov $0xE820, %eax
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int $0x15
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jc _gmdone
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test %ebx, %ebx
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jz _gmdone
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add $24, %di
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jmp _gmnext
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_gmdone: add $24, %di
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PROT
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PROT32
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mov %edi, %eax
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pop %edi
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pop %ebx
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mov %ebp, %esp
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pop %ebp
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ret
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