Changeset 32f6e1bd in mainline for arch/ia32/src/boot/memmap.S


Ignore:
Timestamp:
2005-09-02T15:09:55Z (20 years ago)
Author:
Ondrej Palkovsky <ondrap@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
375237d1
Parents:
7df54df
Message:

Resolved mapping of e820 boot area, so that it can be accessed as
e820table from 32-bit mode and e820table_boot from real mode.

File:
1 edited

Legend:

Unmodified
Added
Removed
  • arch/ia32/src/boot/memmap.S

    r7df54df r32f6e1bd  
    3535
    3636.global memmap_arch_init
    37 .global e820counter
    38 .global e820table
    3937.global e801memorysize
    4038
     
    4846        movw    %bx,%ds
    4947        movw    %bx,%es
    50         movw    $e820table,%di
    51         movb    $E820_MAX_RECORDS,e820counter
     48        movw    $e820table_boot,%di
     49        movb    $E820_MAX_RECORDS,e820counter_boot
    5250e820loop:       
    5351        movl    $E820_SMAP,%edx         # control sequence "SMAP"
     
    6866        movw    %ax,%di
    6967               
    70         decb    e820counter # buffer is full
     68        decb    e820counter_boot # buffer is full
    7169        jz      e820end
    7270       
     
    7674e820end:
    7775        movb    $E820_MAX_RECORDS,%al
    78         subb    e820counter,%al
    79         movb    %al,e820counter # store # of valid entries in e820counter
     76        subb    e820counter_boot,%al
     77        movb    %al,e820counter_boot # store # of valid entries in e820counter
    8078
    8179        jmp     e801begin
    8280
    8381e820err:
    84         movb    $0,e820counter
     82        movb    $0,e820counter_boot
    8583
    8684# method e801 - get size of memory
     
    118116e801memorysize:
    119117        .long   0
    120 
    121 e820counter:
    122         .byte 0xff
    123 
    124 e820table:
    125         .space  (32*E820_RECORD_SIZE),0xff # space for 32 records, each E820_RECORD_SIZE bytes long
     118       
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