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  → /kernel/trunk/core/ @ 102

  → /kernel/trunk/core/ @ 103

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Regard whitespace Rev 102 → Rev 103

/kernel/trunk/core/mem.inc
25,7 → 25,7
mov eax,[general_page_table]
call MEM_Get_Linear_Address ;eax - linear address of page directory
mov edi,eax
mov ebx,eax
mov ebx,eax ;copy address of page directory to safe place
xor eax,eax
mov ecx,4096/4
cld
52,19 → 52,6
mov ecx,4096/4
;ecx (counter) - number of pages in page table
;current address=4Mb*esi
cmp esi,2
jz .start_lfb_map ;lfb map begin at 0x800000
cmp esi,3
jz .end_lfb_map ;lfb map end at 0xC00000
jmp .loop1
.start_lfb_map:
;current address=lfb address
mov ebp,[0x2f0000+0x9018]
add ebp,7 ;add flags
jmp .loop1
.end_lfb_map:
;current address=linear address
mov ebp,12*0x100000+7
.loop1:
mov [eax],ebp ;write page address (with flags) in page table
76,8 → 63,8
cmp esi,edx
jnz .loop
;map region 0x80000000-0x803fffff to 0x800000-0xcfffff
mov eax,1 ;size of the region is 4Mb so only 1 page table needed
;map region 0x80000000-0x807fffff to LFB
mov eax,2 ;size of the region is 4Mb so only 1 page table needed
mov edx,ebx ;ebx still contains linear address of the page directory
add ebx,0x800
call MEM_Alloc_Pages ;alloc page table for the region
84,16 → 71,25
mov eax,[ebx]
add dword [ebx],7 ;add flags
call MEM_Get_Linear_Address ;get linear address of the page table
mov ebx,eax
mov ecx,4096/4 ;number of pages in page table
mov eax,8*0x100000+7
mov edi,[0xfe80]
add edi,7
.loop3:
;ebx - linear address of page table
;eax - current linear address with flags
mov [ebx],eax
add ebx,4
add eax,4096
;eax - linear address of page table
;edi - current linear address with flags
mov [eax],edi
add eax,4
add edi,4096
loop .loop3
mov eax,[ebx+4]
call MEM_Get_Linear_Address
add dword [ebx+4],7
mov ecx,4096/4
.loop31:
mov [eax],edi
add eax,4
add edi,4096
loop .loop31
;map region 0xC0000000-* to 0x0-*
mov esi,edx ;esi=linear address of the page directory