| 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 |