Работа с памятью и CPU

Настройка MTRR:

_F000:19D8                   ; =============== S U B R O U T I N E =======================================
_F000:19D8
_F000:19D8
_F000:19D8                   MTRR_set        proc near                                   ; CODE XREF: sub_F18B7+8Ep
_F000:19D8                                                                               ; sub_F18B7+ABp ...
_F000:19D8 66 51                             push    ecx                                 ; value
_F000:19DA 66 52                             push    edx                                 ; address
_F000:19DA
_F000:19DC
_F000:19DC                   MTRR_set_loop:                                              ; CODE XREF: MTRR_set+79j
_F000:19DC 66 3D 0F 02 00 00                 cmp     eax, MTRRphysMask7                  ; Compare Two Operands
_F000:19E2 77 6F                             ja      short return                        ; Jump if Above (CF=0 & ZF=0)
_F000:19E2
_F000:19E4 66 0B FF                          or      edi, edi                            ; Logical Inclusive OR
_F000:19E7 74 6A                             jz      short return                        ; Jump if Zero (ZF=1)
_F000:19E7
_F000:19E9 66 8B CB                          mov     ecx, ebx
_F000:19EC 66 33 D2                          xor     edx, edx                            ; Logical Exclusive OR
_F000:19EF 66 0F A4 CA 0A                    shld    edx, ecx, 0Ah                       ; Double Precision Shift Left
_F000:19F4 66 C1 E1 0A                       shl     ecx, 0Ah                            ; Shift Logical Left
_F000:19F8 0B CE                             or      cx, si                              ; Logical Inclusive OR
_F000:19FA E8 72 32                          call    MSR_write_caller_jmp                ; Call Procedure
_F000:19FA
_F000:19FD 66 50                             push    eax
_F000:19FF E8 BF FF                          call    bits_check                          ; Call Procedure
_F000:19FF
_F000:1A02 66 B8 FF FF FF FF                 mov     eax, 0FFFFFFFFh
_F000:1A08 66 BA 0F 00 00 00                 mov     edx, 0Fh
_F000:1A0E 80 C1 0A                          add     cl, 0Ah                             ; Add
_F000:1A11 80 F9 20                          cmp     cl, 32                              ; Compare Two Operands
_F000:1A14 72 0F                             jb      short set_31_bit                    ; Jump if Below (CF=1)
_F000:1A14
_F000:1A16 66 33 C0                          xor     eax, eax                            ; clear eax
_F000:1A19 80 E9 20                          sub     cl, 20h ; ' '                       ; Integer Subtraction
_F000:1A1C 66 D3 E2                          shl     edx, cl                             ; Shift Logical Left
_F000:1A1F 66 83 E2 0F                       and     edx, 0Fh                            ; Logical AND
_F000:1A23 EB 03                             jmp     short enable_MTRR_PhysMask          ; Jump
_F000:1A23
_F000:1A25                   ; ---------------------------------------------------------------------------
_F000:1A25
_F000:1A25                   set_31_bit:                                                 ; CODE XREF: MTRR_set+3Cj
_F000:1A25 66 D3 E0                          shl     eax, cl                             ; Shift Logical Left
_F000:1A25
_F000:1A28
_F000:1A28                   enable_MTRR_PhysMask:                                       ; CODE XREF: MTRR_set+4Bj
_F000:1A28 66 8B C8                          mov     ecx, eax
_F000:1A2B 81 C9 00 08                       or      cx, 100000000000b                   ; set [11] bit
_F000:1A2F 66 58                             pop     eax
_F000:1A31 66 40                             inc     eax                                 ; Increment by 1
_F000:1A33 E8 39 32                          call    MSR_write_caller_jmp                ; Call Procedure
_F000:1A33
_F000:1A36 66 8B D3                          mov     edx, ebx
_F000:1A39 E8 85 FF                          call    bits_check                          ; Call Procedure
_F000:1A39
_F000:1A3C 66 BB 01 00 00 00                 mov     ebx, 1
_F000:1A42 66 D3 E3                          shl     ebx, cl                             ; Shift Logical Left
_F000:1A45 66 53                             push    ebx
_F000:1A47 66 03 DA                          add     ebx, edx                            ; Add
_F000:1A4A 66 5A                             pop     edx
_F000:1A4C 66 2B FA                          sub     edi, edx                            ; Integer Subtraction
_F000:1A4F 66 40                             inc     eax                                 ; Increment by 1
_F000:1A51 EB 89                             jmp     short MTRR_set_loop                 ; Jump
_F000:1A51
_F000:1A53                   ; ---------------------------------------------------------------------------
_F000:1A53
_F000:1A53                   return:                                                     ; CODE XREF: MTRR_set+Aj
_F000:1A53                                                                               ; MTRR_set+Fj
_F000:1A53 66 5A                             pop     edx
_F000:1A55 66 59                             pop     ecx
_F000:1A57 C3                                retn                                        ; Return Near from Procedure
_F000:1A57
_F000:1A57                   MTRR_set        endp
_F000:1A57

Сброс MTRR

F000:17E6 FF 02 50 02 58 02+MTRR_list       struct_MTRR <2FFh, 250h, 258h, 259h, 268h, 269h, 26Ah, 26Bh, 26Ch, \
_F000:17E6 59 02 68 02 69 02+                                                            ; DATA XREF: MTRR_clear+2o
_F000:17E6 6A 02 6B 02 6C 02+                             26Dh, 26Eh, 26Fh, 200h, 201h, 202h, 203h, 204h, 205h, \
_F000:17E6 6D 02 6E 02 6F 02+                             206h, 207h, 208h, 209h, 20Ah, 20Bh, 20Ch, 20Dh, 20Eh, \
_F000:17E6 00 02 01 02 02 02+                             20Fh, 404h, 408h, 40Ch, 410h>
_F000:1826
_F000:1826                   ; =============== S U B R O U T I N E =======================================
_F000:1826
_F000:1826
_F000:1826                   MTRR_clear      proc near                                   ; CODE XREF: _F000:1871j
_F000:1826 B3 20                             mov     bl, 32
_F000:1828 BE E6 17                          mov     si, offset MTRR_list
_F000:182B 66 33 C0                          xor     eax, eax                            ; Logical Exclusive OR
_F000:182E 66 33 D2                          xor     edx, edx                            ; Logical Exclusive OR
_F000:182E
_F000:1831
_F000:1831                   mtrr_clear_loop:                                            ; CODE XREF: MTRR_clear+17j
_F000:1831 66 2E 0F B7 0C                    movzx   ecx, word ptr cs:[si]               ; Move with Zero-Extend
_F000:1836 0F 30                             wrmsr                                       ; Write Machine Status Register
_F000:1838 83 C6 02                          add     si, 2                               ; Add
_F000:183B FE CB                             dec     bl                                  ; Decrement by 1
_F000:183D 75 F2                             jnz     short mtrr_clear_loop               ; Jump if Not Zero (ZF=0)
_F000:183D
_F000:183F FF E7                             jmp     di                                  ; Indirect Near Jump
_F000:183F
_F000:183F                   MTRR_clear      endp