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align heap_base on 4Mb border

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move sys_pgmap at the top of kernel memory

git-svn-id: svn://kolibrios.org@513 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
2007-05-20 10:01:18 +00:00
parent 0b7151a256
commit 4c1ad6f2c7
5 changed files with 47 additions and 47 deletions
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42
kernel/trunk/init.inc
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@@ -40,6 +40,10 @@ proc init_mem
shr eax, 3
mov [pg_data.pagemap_size-OS_BASE], eax
add eax, (sys_pgmap-OS_BASE)+4095
and eax, not 4095
mov [tmp_page_tabs], eax
cmp edx, (OS_BASE/4096)
jbe @F
mov edx, (OS_BASE/4096)
@@ -74,21 +78,23 @@ proc init_mem
or ebx, CR4_PGE
@@:
mov cr4, ebx
sub [pg_data.kernel_tables-OS_BASE], 1
dec [pg_data.kernel_tables-OS_BASE]
mov [edx], eax
add eax, 0x00400000
; mov [edx+4], eax
add edx, 4
mov eax, 0x400000+PG_SW
mov ecx, (tmp_page_tab-0x400000)/4096
mov ecx, [tmp_page_tabs]
sub ecx, 0x400000
shr ecx, 12 ;ecx/=4096
jmp .map_low
.no_PSE:
mov eax, PG_SW
mov ecx, tmp_page_tab/4096
mov ecx, [tmp_page_tabs]
shr ecx, 12
.map_low:
mov edi, tmp_page_tab
mov edi, [tmp_page_tabs]
@@: ;
stosd
add eax, 0x1000
@@ -101,7 +107,8 @@ proc init_mem
rep stosd
mov ecx, [pg_data.kernel_tables-OS_BASE]
mov eax, tmp_page_tab+PG_SW
mov eax, [tmp_page_tabs]
or eax, PG_SW
mov edi, edx
.map_kernel_tabs:
@@ -131,29 +138,23 @@ align 4
proc init_page_map
mov edi, sys_pgmap-OS_BASE
mov ecx, ((HEAP_BASE-OS_BASE)/4096)/32 ;384/4
mov ebx, ecx
xor eax,eax
mov ecx, [pg_data.pagemap_size-OS_BASE]
shr ecx, 2
or eax, -1
cld
rep stosd
not eax
mov ecx, [pg_data.pagemap_size-OS_BASE]
sub ecx, ebx
shr ecx, 2
rep stosd
lea edi, [sys_pgmap-OS_BASE+ebx*4] ;+384
mov ecx, [tmp_page_tabs]
mov edx, [pg_data.pages_count-OS_BASE]
mov ecx, [pg_data.kernel_tables-OS_BASE]
add ecx, ((HEAP_BASE-OS_BASE)/4096) and 31
sub edx, (HEAP_BASE-OS_BASE)/4096
shr ecx, 12
add ecx, [pg_data.kernel_tables-OS_BASE]
sub edx, ecx
mov [pg_data.pages_free-OS_BASE], edx
xor eax, eax
mov edi, sys_pgmap-OS_BASE
mov ebx, ecx
shr ecx, 5
xor eax, eax
rep stosd
not eax
@@ -169,7 +170,6 @@ proc init_page_map
mov [page_end-OS_BASE], ebx
mov [pg_data.pg_mutex-OS_BASE], 0
ret
endp