| 34,8 → 34,6 |
|---|
| E820_SMAP = 0x534d4150 |
| |
| .global memmap_arch_init |
| .global e820counter |
| .global e820table |
| .global e801memorysize |
| |
| .code16 |
| 47,8 → 45,8 |
|---|
| xorl %ebx,%ebx # during first call, ebx must be 0 |
| movw %bx,%ds |
| movw %bx,%es |
| movw $e820table,%di |
| movb $E820_MAX_RECORDS,e820counter |
| movw $e820table_boot,%di |
| movb $E820_MAX_RECORDS,e820counter_boot |
| e820loop: |
| movl $E820_SMAP,%edx # control sequence "SMAP" |
| |
| 67,7 → 65,7 |
|---|
| addw $E820_RECORD_SIZE,%ax |
| movw %ax,%di |
| |
| decb e820counter # buffer is full |
| decb e820counter_boot # buffer is full |
| jz e820end |
| |
| cmpl $0,%ebx |
| 75,13 → 73,13 |
|---|
| |
| e820end: |
| movb $E820_MAX_RECORDS,%al |
| subb e820counter,%al |
| movb %al,e820counter # store # of valid entries in e820counter |
| subb e820counter_boot,%al |
| movb %al,e820counter_boot # store # of valid entries in e820counter |
| |
| jmp e801begin |
| |
| e820err: |
| movb $0,e820counter |
| movb $0,e820counter_boot |
| |
| # method e801 - get size of memory |
| |
| 117,9 → 115,4 |
|---|
| #memory size in 1 kb chunks |
| e801memorysize: |
| .long 0 |
| |
| e820counter: |
| .byte 0xff |
| |
| e820table: |
| .space (32*E820_RECORD_SIZE),0xff # space for 32 records, each E820_RECORD_SIZE bytes long |
| |