| /kernel/trunk/core/mtrr.inc |
|---|
| 7,12 → 7,22 |
| $Revision$ |
| ; Initializes MTRRs. |
| proc init_mtrr |
| ; Initializes PAT (Page Attribute Table) and MTRRs. |
| proc init_pat_mtrr |
| cmp [BOOT.mtrr], byte 2 |
| je .exit |
| bt [cpu_caps], CAPS_PAT ; if PAT is not supported, use MTRR |
| jnc .use_mtrr |
| ; Change PAT_MSR for write combining memory. |
| mov ecx, MSR_CR_PAT |
| mov eax, PAT_VALUE ; UC UCM WC WB |
| mov edx, eax |
| wrmsr |
| ret |
| .use_mtrr: |
| bt [cpu_caps], CAPS_MTRR |
| jnc .exit |
| 739,17 → 749,7 |
| jmp @b |
| @@: |
| ; 9i. Check PAT support and reprogram PAT_MASR for write combining memory |
| bt [cpu_caps], CAPS_PAT |
| jnc @F |
| mov ecx, MSR_CR_PAT |
| mov eax, PAT_VALUE ;UC UCM WC WB |
| mov edx, eax |
| wrmsr |
| @@: |
| ; 9j. Changes are done. |
| ; 9i. Changes are done. |
| call mtrr_end_change |
| .abort: |
| /kernel/trunk/core/mtrrtest.asm |
|---|
| 18,12 → 18,12 |
| MAX_VARIABLE_MTRR = 10 |
| start: |
| ; Copy test inputs, run init_mtrr, compare with test outputs. Repeat. |
| ; Copy test inputs, run init_pat_mtrr, compare with test outputs. Repeat. |
| mov esi, test1_in_data |
| mov edi, mtrrdata |
| mov ecx, mtrrdata_size / 4 |
| rep movsd |
| call init_mtrr |
| call init_pat_mtrr |
| mov esi, test1_out_data |
| mov edi, mtrrdata |
| mov ecx, mtrrdata_size / 4 |
| 33,7 → 33,7 |
| mov edi, mtrrdata |
| mov ecx, mtrrdata_size / 4 |
| rep movsd |
| call init_mtrr |
| call init_pat_mtrr |
| mov esi, test2_out_data |
| mov edi, mtrrdata |
| mov ecx, mtrrdata_size / 4 |
| /kernel/trunk/kernel.asm |
|---|
| 436,7 → 436,7 |
| list_init eax |
| call init_video |
| call init_mtrr |
| call init_pat_mtrr |
| mov [LFBAddress], LFB_BASE |
| mov ecx, bios_fb |
| call set_framebuffer |