| 29,8 → 29,6 |
|---|
| |
| #include <arch/boot/memmapasm.h> |
| |
| E820_RECORD_SIZE = MEMMAP_E820_RECORD_SIZE |
| E820_MAX_RECORDS = MEMMAP_E820_MAX_RECORDS |
| E820_SMAP = 0x534d4150 |
| |
| .global memmap_arch_init |
| 46,12 → 44,12 |
|---|
| movw %bx,%ds |
| movw %bx,%es |
| movw $e820table_boot,%di |
| movb $E820_MAX_RECORDS,e820counter_boot |
| movb $MEMMAP_E820_MAX_RECORDS,e820counter_boot |
| e820loop: |
| movl $E820_SMAP,%edx # control sequence "SMAP" |
| |
| movl $0x0000e820,%eax # service |
| movl $E820_RECORD_SIZE,%ecx |
| movl $MEMMAP_E820_RECORD_SIZE,%ecx |
| int $0x15 |
| jc e820err |
| |
| 58,11 → 56,11 |
|---|
| cmpl $E820_SMAP,%eax # verifying BIOS |
| jne e820err |
| |
| cmpl $E820_RECORD_SIZE,%ecx |
| cmpl $MEMMAP_E820_RECORD_SIZE,%ecx |
| jne e820err # bad record size - bug in bios |
| |
| movw %di,%ax # next record |
| addw $E820_RECORD_SIZE,%ax |
| addw $MEMMAP_E820_RECORD_SIZE,%ax |
| movw %ax,%di |
| |
| decb e820counter_boot # buffer is full |
| 72,7 → 70,7 |
|---|
| jne e820loop |
| |
| e820end: |
| movb $E820_MAX_RECORDS,%al |
| movb $MEMMAP_E820_MAX_RECORDS,%al |
| subb e820counter_boot,%al |
| movb %al,e820counter_boot # store # of valid entries in e820counter |
| |