Работа с SMBus

10 Окт 2010 - 23:18 sush

Базовый адрес портов ввода/вывода SMBus указывается в конфигурационном регистре SMB_BASE (обычно регистр по смещению 20h) контроллера SMBus (обычно в составе южного моста).

12 Окт 2010 - 09:52 BIOS71-dada

"Базовый адрес портов ввода/вывода SMBus указывается ..." - или смотрится в ACPI таблицах

20 Янв 2012 - 23:09 XVilka

>> 107 >> 15.16

One more example:
Asrock P4i65gv, AMIBIOS, Intel i865

 BOOTBLK:56B1 BOOTBLK:56B1 BOOTBLK:56B1 BOOTBLK:56B1 BOOTBLK:56B1 BOOTBLK:56B1 66 0F CF BOOTBLK:56B4 66 C1 C0 10 BOOTBLK:56B8 B9 B8 0B BOOTBLK:56B8 BOOTBLK:56BB BOOTBLK:56BB BOOTBLK:56BB B8 FF 00 BOOTBLK:56BE BF C4 56 BOOTBLK:56C1 E9 C2 00 BOOTBLK:56C1 BOOTBLK:56C4 BOOTBLK:56C4 BOOTBLK:56C4 BOOTBLK:56C4 E6 ED BOOTBLK:56C6 B4 00 BOOTBLK:56C8 BF CE 56 BOOTBLK:56CB E9 C0 00 BOOTBLK:56CB BOOTBLK:56CE BOOTBLK:56CE BOOTBLK:56CE BOOTBLK:56CE 24 0F BOOTBLK:56D0 3C 00 BOOTBLK:56D2 74 0C BOOTBLK:56D2 BOOTBLK:56D4 E2 E5 BOOTBLK:56D4 BOOTBLK:56D6 66 C1 C8 10 BOOTBLK:56DA 66 0F CF BOOTBLK:56DD F9 BOOTBLK:56DE FF E7 BOOTBLK:56DE BOOTBLK:56DE BOOTBLK:56DE BOOTBLK:56E0 BOOTBLK:56E0 BOOTBLK:56E0 BOOTBLK:56E0 BOOTBLK:56E0 BOOTBLK:56E0 B8 D2 04 BOOTBLK:56E0 BOOTBLK:56E3 BF E9 56 BOOTBLK:56E6 E9 9D 00 BOOTBLK:56E6 BOOTBLK:56E9 BOOTBLK:56E9 BOOTBLK:56E9 BOOTBLK:56E9 66 C1 C0 08 BOOTBLK:56ED 0C 80 BOOTBLK:56EF B4 03 BOOTBLK:56F1 BF F7 56 BOOTBLK:56F4 E9 8F 00 BOOTBLK:56F4 BOOTBLK:56F7 BOOTBLK:56F7 BOOTBLK:56F7 BOOTBLK:56F7 66 C1 C0 08 BOOTBLK:56FB B4 05 BOOTBLK:56FD BF 03 57 BOOTBLK:5700 E9 83 00 BOOTBLK:5700 BOOTBLK:5703 BOOTBLK:5703 BOOTBLK:5703 BOOTBLK:5703 B8 48 02 BOOTBLK:5703 BOOTBLK:5706 BF 0B 57 BOOTBLK:5709 EB 7B BOOTBLK:5709 BOOTBLK:570B BOOTBLK:570B BOOTBLK:570B BOOTBLK:570B B9 10 27 BOOTBLK:570B BOOTBLK:570E BOOTBLK:570E BOOTBLK:570E E6 ED BOOTBLK:5710 E2 FC BOOTBLK:5710 BOOTBLK:5712 B8 FF 00 BOOTBLK:5715 BF 1A 57 BOOTBLK:5718 EB 6C BOOTBLK:5718 BOOTBLK:571A BOOTBLK:571A BOOTBLK:571A BOOTBLK:571A 66 0F CF BOOTBLK:571D F8 BOOTBLK:571E FF E7 BOOTBLK:571E BOOTBLK:571E BOOTBLK:571E BOOTBLK:5720 BOOTBLK:5720 BOOTBLK:5720 BOOTBLK:5720 BOOTBLK:5720 BOOTBLK:5720 66 0F CF BOOTBLK:5723 66 C1 C0 10 BOOTBLK:5727 B9 B8 0B BOOTBLK:5727 BOOTBLK:572A BOOTBLK:572A BOOTBLK:572A B8 FF 00 BOOTBLK:572D BF 32 57 BOOTBLK:5730 EB 54 BOOTBLK:5730 BOOTBLK:5732 BOOTBLK:5732 BOOTBLK:5732 BOOTBLK:5732 E6 ED BOOTBLK:5734 B4 00 BOOTBLK:5736 BF 3B 57 BOOTBLK:5739 EB 53 BOOTBLK:5739 BOOTBLK:573B BOOTBLK:573B BOOTBLK:573B BOOTBLK:573B 24 0F BOOTBLK:573D 3C 00 BOOTBLK:573F 74 0C BOOTBLK:573F BOOTBLK:5741 E2 E7 BOOTBLK:5741 BOOTBLK:5743 66 C1 C8 10 BOOTBLK:5747 66 0F CF BOOTBLK:574A F9 BOOTBLK:574B FF E7 BOOTBLK:574B BOOTBLK:574B BOOTBLK:574B BOOTBLK:574D BOOTBLK:574D BOOTBLK:574D BOOTBLK:574D BOOTBLK:574D BOOTBLK:574D B8 D3 04 BOOTBLK:574D BOOTBLK:5750 BF 55 57 BOOTBLK:5753 EB 31 BOOTBLK:5753 BOOTBLK:5755 BOOTBLK:5755 BOOTBLK:5755 BOOTBLK:5755 66 C1 C0 08 BOOTBLK:5759 0C 80 BOOTBLK:575B B4 03 BOOTBLK:575D BF 62 57 BOOTBLK:5760 EB 24 BOOTBLK:5760 BOOTBLK:5762 BOOTBLK:5762 BOOTBLK:5762 BOOTBLK:5762 B8 48 02 BOOTBLK:5762 BOOTBLK:5765 BF 6A 57 BOOTBLK:5768 EB 1C BOOTBLK:5768 BOOTBLK:576A BOOTBLK:576A BOOTBLK:576A BOOTBLK:576A B9 30 75 BOOTBLK:576A BOOTBLK:576D BOOTBLK:576D BOOTBLK:576D E6 ED BOOTBLK:576F E2 FC BOOTBLK:576F BOOTBLK:5771 B8 FF 00 BOOTBLK:5774 BF 79 57 BOOTBLK:5777 EB 0D BOOTBLK:5777 BOOTBLK:5779 BOOTBLK:5779 BOOTBLK:5779 BOOTBLK:5779 B4 05 BOOTBLK:577B BF 80 57 BOOTBLK:577E EB 0E BOOTBLK:577E BOOTBLK:5780 BOOTBLK:5780 BOOTBLK:5780 BOOTBLK:5780 66 0F CF BOOTBLK:5783 F8 BOOTBLK:5784 FF E7 BOOTBLK:5784 BOOTBLK:5784 BOOTBLK:5784 BOOTBLK:5786 BOOTBLK:5786 BOOTBLK:5786 BOOTBLK:5786 BOOTBLK:5786 BOOTBLK:5786 BOOTBLK:5786 BOOTBLK:5786 BA 00 04 BOOTBLK:5789 8A D4 BOOTBLK:578B EE BOOTBLK:578C FF E7 BOOTBLK:578C BOOTBLK:578C BOOTBLK:578C BOOTBLK:578E BOOTBLK:578E BOOTBLK:578E BOOTBLK:578E BOOTBLK:578E BOOTBLK:578E BOOTBLK:578E BOOTBLK:578E BA 00 04 BOOTBLK:5791 8A D4 BOOTBLK:5793 EC BOOTBLK:5794 FF E7 BOOTBLK:5794 BOOTBLK:5794 BOOTBLK:5794

; =============== S U B R O U T I N E ======================================= SMBus_WriteBlock proc near ; CODE XREF: sub_F54A6+93j ; sub_F54A6+C0j ... bswap edi ; Swap bytes rol eax, 10h ; Rotate Left mov cx, 0BB8h write_loop: ; CODE XREF: SMBus_WriteBlock+23j mov ax, 0FFh ; value mov di, offset SMB_Read_Host_Status jmp SMBus_io_write_SL ; set SMB Host Status ; --------------------------------------------------------------------------- SMB_Read_Host_Status: ; DATA XREF: SMBus_WriteBlock+Do out 0EDh, al ; delay mov ah, 0 ; reg mov di, offset SMB_Check_Host_Status jmp SMBus_io_read_SL ; set SMB_Host_Status ; --------------------------------------------------------------------------- SMB_Check_Host_Status: ; DATA XREF: SMBus_WriteBlock+17o and al, 1111b ; Logical AND cmp al, 0 ; No SMB errors jz short SMBus_WriteByte ; Jump if Zero (ZF=1) loop write_loop ; Loop while CX != 0 ror eax, 10h ; Rotate Right bswap edi ; Swap bytes stc ; Set Carry Flag jmp di ; Indirect Near Jump SMBus_WriteBlock endp ; =============== S U B R O U T I N E ======================================= SMBus_WriteByte proc near ; CODE XREF: SMBus_WriteBlock+21j mov ax, 4D2h ; reg = 0x4; // XMIT_SLVA - Transmit Slave Address ; value = 0xD2; mov di, offset SMB_Send_CMD jmp SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- SMB_Send_CMD: ; DATA XREF: SMBus_WriteByte+3o rol eax, 8 ; Rotate Left or al, 80h ; value mov ah, 3 ; reg = 0x3; // HST_CMD - Host Command mov di, offset SMB_Send_Data jmp SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- SMB_Send_Data: ; DATA XREF: SMBus_WriteByte+11o rol eax, 8 ; value mov ah, 5 ; reg = 0x5; // HST_D0 - Host Data 0 mov di, offset SMB_Prepare_Controller jmp SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- SMB_Prepare_Controller: ; DATA XREF: SMBus_WriteByte+1Do mov ax, 248h ; reg = 0x2; // HST_CNT - Host Control ; value = 0x48; mov di, offset loc_F570B jmp short SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- loc_F570B: ; DATA XREF: SMBus_WriteByte+26o mov cx, 2710h delay_loop: ; CODE XREF: SMBus_WriteByte+30j out 0EDh, al loop delay_loop ; Loop while CX != 0 mov ax, 0FFh ; value mov di, offset return jmp short SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- return: ; DATA XREF: SMBus_WriteByte+35o bswap edi ; Swap bytes clc ; Clear Carry Flag jmp di ; Indirect Near Jump SMBus_WriteByte endp ; =============== S U B R O U T I N E ======================================= SMBus_ReadBlock proc near ; CODE XREF: sub_F54A6+ACj bswap edi ; Swap bytes rol eax, 10h ; Rotate Left mov cx, 0BB8h read_loop: ; CODE XREF: SMBus_ReadBlock+21j mov ax, 0FFh mov di, offset SMB_Read_Host_Status jmp short SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- SMB_Read_Host_Status: ; DATA XREF: SMBus_ReadBlock+Do out 0EDh, al mov ah, 0 mov di, offset SMB_Check_Host_Status jmp short SMBus_io_read_SL ; Jump ; --------------------------------------------------------------------------- SMB_Check_Host_Status: ; DATA XREF: SMBus_ReadBlock+16o and al, 0Fh ; Logical AND cmp al, 0 ; Compare Two Operands jz short SMBus_ReadByte ; Jump if Zero (ZF=1) loop read_loop ; Loop while CX != 0 ror eax, 10h ; Rotate Right bswap edi ; Swap bytes stc ; Set Carry Flag jmp di ; Indirect Near Jump SMBus_ReadBlock endp ; =============== S U B R O U T I N E ======================================= SMBus_ReadByte proc near ; CODE XREF: SMBus_ReadBlock+1Fj mov ax, 4D3h ; reg = 0x4; // XMIT_SLVA - Transmit Slave Address ; value = 0xD3; mov di, offset SMB_Send_CMD jmp short SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- SMB_Send_CMD: ; DATA XREF: SMBus_ReadByte+3o rol eax, 8 ; Rotate Left or al, 80h ; Logical Inclusive OR mov ah, 3 ; reg = 0x3; // HST_CMD - Host Command mov di, offset SMB_Prepare_Controller jmp short SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- SMB_Prepare_Controller: ; DATA XREF: SMBus_ReadByte+10o mov ax, 248h ; reg = 0x2; // HST_CNT - Host Control ; value = 0x48; mov di, offset loc_F576A jmp short SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- loc_F576A: ; DATA XREF: SMBus_ReadByte+18o mov cx, 7530h delay_loop: ; CODE XREF: SMBus_ReadByte+22j out 0EDh, al loop delay_loop ; Loop while CX != 0 mov ax, 0FFh mov di, offset SMB_Read_Data jmp short SMBus_io_write_SL ; Jump ; --------------------------------------------------------------------------- SMB_Read_Data: ; DATA XREF: SMBus_ReadByte+27o mov ah, 5 ; reg = 0x5; // HST_D0 - Host Data 0 mov di, offset return jmp short SMBus_io_read_SL ; Jump ; --------------------------------------------------------------------------- return: ; DATA XREF: SMBus_ReadByte+2Eo bswap edi ; Swap bytes clc ; Clear Carry Flag jmp di ; Indirect Near Jump SMBus_ReadByte endp ; =============== S U B R O U T I N E ======================================= ; void __usercall SMBus_io_write_SL(__int8 reg<ah>, __int8 value<al>) SMBus_io_write_SL proc near ; CODE XREF: SMBus_WriteBlock+10j ; SMBus_WriteByte+6j ... mov dx, 400h mov dl, ah out dx, al jmp di ; Indirect Near Jump SMBus_io_write_SL endp ; =============== S U B R O U T I N E ======================================= ; __int8 __usercall SMBus_io_read_SL<al>(__int8 reg<ah>) SMBus_io_read_SL proc near ; CODE XREF: SMBus_WriteBlock+1Aj ; SMBus_ReadBlock+19j ... mov dx, 400h mov dl, ah in al, dx jmp di ; Indirect Near Jump SMBus_io_read_SL endp

20 Мар 2021 - 20:51 Unnovn BIOS хэ86_64

? Эм, а есть ли готовая прога(типа i2ctools для *никс, но под винду) чтоб записань нужные байты в смбас (конкретно в spd eeprom dram-модуля) amd чипсет(880).

П.С. Тайпхун не предлагать, чегото афтар злой у неё

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Работа с SMBus

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