405,95 → 405,6 |
endp |
|
align 4 |
proc init_LFB |
locals |
pg_count dd ? |
endl |
|
cmp dword [LFBAddress], -1 |
jne @f |
mov [BOOT_VARS+BOOT_MTRR], byte 2 |
; max VGA=640*480*4=1228800 bytes |
; + 32*640*4=81920 bytes for mouse pointer |
stdcall alloc_pages, ((1228800+81920)/4096) |
|
push eax |
call alloc_page |
stdcall map_page_table, LFB_BASE, eax |
pop eax |
or eax, PG_UWR |
mov ebx, LFB_BASE |
; max VGA=640*480*4=1228800 bytes |
; + 32*640*4=81920 bytes for mouse pointer |
mov ecx, (1228800+81920)/4096 |
call commit_pages |
mov [LFBAddress], dword LFB_BASE |
ret |
@@: |
test [SCR_MODE], word 0100000000000000b |
jnz @f |
mov [BOOT_VARS+BOOT_MTRR], byte 2 |
ret |
@@: |
call init_mtrr |
|
mov edx, LFB_BASE |
mov esi, [LFBAddress] |
mov edi, 0x00C00000 |
mov dword [exp_lfb+4], edx |
|
shr edi, 12 |
mov [pg_count], edi |
shr edi, 10 |
|
bt [cpu_caps], CAPS_PSE |
jnc .map_page_tables |
or esi, PDE_LARGE+PG_UWR |
mov edx, sys_proc+PROC.pdt_0+(LFB_BASE shr 20) |
@@: |
mov [edx], esi |
add edx, 4 |
add esi, 0x00400000 |
dec edi |
jnz @B |
|
bt [cpu_caps], CAPS_PGE |
jnc @F |
or dword [sys_proc+PROC.pdt_0+(LFB_BASE shr 20)], PG_GLOBAL |
@@: |
mov dword [LFBAddress], LFB_BASE |
mov eax, cr3 ;flush TLB |
mov cr3, eax |
ret |
|
.map_page_tables: |
|
@@: |
call alloc_page |
stdcall map_page_table, edx, eax |
add edx, 0x00400000 |
dec edi |
jnz @B |
|
mov eax, [LFBAddress] |
mov edi, page_tabs + (LFB_BASE shr 10) |
or eax, PG_GLOBAL+PG_UWR |
and eax, [pte_valid_mask] |
mov ecx, [pg_count] |
cld |
@@: |
stosd |
add eax, 0x1000 |
loop @B |
|
mov dword [LFBAddress], LFB_BASE |
mov eax, cr3 ;flush TLB |
mov cr3, eax |
|
ret |
endp |
|
align 4 |
proc new_mem_resize stdcall, new_size:dword |
|
push ebx |