| 232,24 → 232,12 |
|---|
| mov edi, ebx |
| shr edi, 12 |
| lea edi, [page_tabs+edi*4] |
| |
| if USE_FIX_FOR_INVALID_MS_VIRTUAL_PC_2007 |
| mov edx, eax |
| @@: |
| mov eax, edx |
| stosd |
| invlpg [ebx] |
| add edx, 0x1000 |
| add ebx, 0x1000 |
| loop @B |
| else |
| @@: |
| stosd |
| invlpg [ebx] |
| add eax, 0x1000 |
| add ebx, 0x1000 |
| loop @B |
| end if |
| |
| pop edi |
| |
| 362,6 → 350,59 |
|---|
| ret |
| endp |
| |
| uglobal |
| sb16_buffer_allocated db 0 |
| endg |
| |
| ; Allocates [.size] bytes so that the target memory block |
| ; is inside one 64K page for 24-bit DMA controller, |
| ; that is, somewhere between 00xx0000h and 00xxFFFFh. |
| proc alloc_dma24 |
| ; Implementation note. |
| ; The only user of that function is SB16 driver, |
| ; so just return a statically allocated buffer. |
| virtual at esp |
| dd ? ; return address |
| .size dd ? |
| end virtual |
| cmp [sb16_buffer_allocated], 0 |
| jnz .fail |
| inc [sb16_buffer_allocated] |
| mov eax, SB16Buffer |
| ret 4 |
| .fail: |
| xor eax, eax |
| ret 4 |
| endp |
| |
| ; Allocates a physical page for master page table |
| ; that duplicates first Mb of OS_BASE at address 0; |
| ; used for starting APs and for shutting down, |
| ; where it is important to execute code in trivial-mapped pages. |
| ; Returns eax = allocated physical page. |
| proc create_trampoline_pgmap |
| ; The only non-trivial moment: |
| ; we need a linear address to fill information, |
| ; but we don't need it outside of this function, |
| ; so we're returning physical address. |
| ; Therefore, allocate memory with kernel_alloc, |
| ; this will allocate physical page and a linear address somewhere, |
| ; and deallocate only linear address with free_kernel_space. |
| stdcall kernel_alloc, 0x1000 |
| mov edi, eax |
| mov esi, master_tab |
| mov ecx, 1024 |
| rep movsd |
| mov ecx, [master_tab+(OS_BASE shr 20)] |
| mov [eax], ecx |
| mov edi, eax |
| call get_pg_addr |
| push eax |
| stdcall free_kernel_space, edi |
| pop eax |
| ret |
| endp |
| |
| align 4 |
| proc init_LFB |
| locals |