forked from KolibriOS/kolibrios
kolibri-ahci:
- add ahci_send_cmd - add ahci_flush_cmd - add ahci_port_rebase - other small changes git-svn-id: svn://kolibrios.org@9068 a494cfbc-eb01-0410-851d-a64ba20cac60
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@ -90,6 +90,29 @@ struct HBA_PORT
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vendor rd 4 ; 0x70 - 0x7F, vendor specific
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ends
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; Command header structure
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struct HBA_CMD_HDR
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_flags1 db ? ; 0bPWACCCCC, P - Prefetchable, W - Write (1: H2D, 0: D2H)
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; A - ATAPI, C - Command FIS length in DWORDS, 2 ~ 16
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_flags2 db ? ; 0bPPPPRCB(Re), P - Port multiplier port, R - Reserved,
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; C - Clear busy upon R_OK, B - BIST, Re - Reset
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prdtl dw ? ; Physical region descriptor table length in entries
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prdbc dd ? ; Physical region descriptor byte count transferred
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ctba dd ? ; Command table descriptor base address
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ctbau dd ? ; Command table descriptor base address upper 32 bits
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rsv1 rd 4 ; Reserved
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ends
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; Contains virtual mappings for port phys memory regions
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struct PORT_DATA
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clb dd ? ; Command list base
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fb dd ? ; FIS base
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ctba_arr rd 32 ; ctba_arr[0] = clb[0].ctba, ... and so on.
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port dd ? ; address of correspoding HBA_PORT structure
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ends
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; Register FIS – Host to Device
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struct FIS_REG_H2D
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fis_type db ? ; FIS_TYPE_REG_H2D
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@ -215,12 +238,13 @@ ends
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uglobal
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align 4
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ahci_controller AHCI_DATA
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port_data_arr rb (sizeof.PORT_DATA*AHCI_MAX_PORTS)
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endg
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; -----------------------------------------------------------------------
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; detect ahci controller and initialize
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align 4
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init_ahci:
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ahci_init:
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mov ecx, ahci_controller
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mov esi, pcidev_list
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.find_ahci_ctr:
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@ -369,6 +393,11 @@ init_ahci:
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DEBUGF 1, "K: AHCI: found drive at port %d, signature = %x\n", ebx, [edi + HBA_PORT.signature]
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mov ecx, ebx
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shl ecx, BSF sizeof.PORT_DATA
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add ecx, port_data_arr
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stdcall ahci_port_rebase, edi, ebx, ecx
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.continue_detect_drives:
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inc ebx
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jmp .detect_drives
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@ -381,11 +410,9 @@ init_ahci:
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ret
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; -------------------------------------------------
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; TODO: implement function port_rebase
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; Start command engine
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; in: eax - address of HBA_PORT structure
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start_cmd:
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ahci_start_cmd:
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.wait_cr: ; Wait until CR (bit15) is cleared
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bt [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_CR
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jc .wait_cr
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@ -393,12 +420,12 @@ start_cmd:
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; Set FRE (bit4) and ST (bit0)
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bts [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_FRE
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bts [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_ST
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; maybe here call ahci flush cmd ? TODO (see seakernel)
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ret
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; Stop command engine
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; in: eax - address of HBA_PORT structure
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stop_cmd:
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ahci_stop_cmd:
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btr [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_ST ; Clear ST (bit0)
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btr [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_FRE ; Clear FRE (bit4)
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.wait_fr_cr: ; Wait until FR (bit14), CR (bit15) are cleared
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@ -409,6 +436,149 @@ stop_cmd:
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ret
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; The commands may not take effect until the command
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; register is read again by software, because reasons.
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; in: eax - address of HBA_PORT structure
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; out: eax - command register value
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ahci_flush_cmd:
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mov eax, [eax + HBA_PORT.command]
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ret
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; Send command to port
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; in: eax - address of HBA_PORT structure
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; ebx - index of command slot
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ahci_send_cmd:
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push ecx
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mov [eax + HBA_PORT.interrupt_status], 0xFFFFFFFF
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mov cl, bl
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mov [eax + HBA_PORT.command_issue], 1
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shl [eax + HBA_PORT.command_issue], cl
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call ahci_flush_cmd
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pop ecx
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ret
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; ---------------------------------------------------------------------------
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; TODO: check correctness
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; in: port - address of HBA_PORT structure
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; portno - port index (0..31)
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; pdata - address of PORT_DATA structure
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proc ahci_port_rebase stdcall, port: dword, portno: dword, pdata: dword
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locals
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phys_page1 dd ?
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virt_page1 dd ?
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phys_page23 dd ?
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virt_page23 dd ?
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tmp dd ?
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endl
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pushad
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DEBUGF 1, "Rebasing port %u\n", [portno]
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mov eax, [port]
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call ahci_stop_cmd
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; Command list entry size = 32
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; Command list entry maxim count = 32
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; Command list maxim size = 32*32 = 1K per port
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call alloc_page
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mov [phys_page1], eax
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stdcall map_io_mem, eax, 4096, PG_NOCACHE + PG_SWR ; map to virt memory so we can work with it
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mov [virt_page1], eax
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mov esi, [port]
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mov ebx, [phys_page1]
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mov [esi + HBA_PORT.command_list_base_l], ebx ; set the command list base
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mov [esi + HBA_PORT.command_list_base_h], 0 ; zero upper 32 bits of addr cause we are 32 bit os
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mov edi, [pdata]
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mov ebx, [virt_page1]
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mov [edi + PORT_DATA.clb], ebx ; set pdata->clb
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mov eax, [port]
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mov [edi + PORT_DATA.port], eax ; set pdata->port
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stdcall _memset, ebx, 0, 1024 ; zero out the command list
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; FIS entry size = 256 bytes per port
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mov eax, [phys_page1]
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add eax, 1024
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mov [esi + HBA_PORT.fis_base_l], eax
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mov [esi + HBA_PORT.fis_base_h], 0
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mov eax, [virt_page1]
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add eax, 1024
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mov [edi + PORT_DATA.fb], eax ; set pdata->fb
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stdcall _memset, eax, 0, 256 ; zero out
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stdcall alloc_pages, 2
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mov [phys_page23], eax
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stdcall map_io_mem, eax, 2*4096, PG_NOCACHE + PG_SWR
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mov [virt_page23], eax
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; Command table size = 256*32 = 8K per port
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mov edx, [edi + PORT_DATA.clb] ; cmdheader array base
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xor ecx, ecx
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.for1:
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cmp ecx, 32
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jae .for1_end
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mov ebx, ecx
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shl ebx, BSF sizeof.HBA_CMD_HDR
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add ebx, edx ; ebx = cmdheader[ecx]
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mov [ebx + HBA_CMD_HDR.prdtl], 8 ; 8 prdt entries per command table
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; 256 bytes per command table, 64+16+48+16*8
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push edx
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; cmdheader[ecx].ctba = phys_page23 + ecx*256
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mov [ebx + HBA_CMD_HDR.ctba], ecx
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shl [ebx + HBA_CMD_HDR.ctba], BSF 256 ; *= 256
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mov eax, [ebx + HBA_CMD_HDR.ctba]
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mov edx, [phys_page23]
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add [ebx + HBA_CMD_HDR.ctba], edx
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add eax, [virt_page23]
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mov [tmp], eax ; tmp = virt_page23 + ecx*256
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mov eax, ecx
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shl eax, BSF 4 ; *= 4
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add eax, PORT_DATA.ctba_arr
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add eax, edi ; eax = pdata->ctba_arr[ecx]
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mov edx, [tmp]
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mov [eax], edx ; pdata->ctba_arr[ecx] = virt_page23 + ecx*256
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pop edx
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mov [ebx + HBA_CMD_HDR.ctbau], 0
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stdcall _memset, [eax], 0, 256 ; zero out
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inc ecx
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jmp .for1
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.for1_end:
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mov eax, [port]
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call ahci_start_cmd
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DEBUGF 1, "End rebasing port %u\n", [portno]
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popad
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ret
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endp
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proc _memset stdcall, dest:dword, val:byte, cnt:dword ; doesnt clobber any registers
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;DEBUGF DBG_INFO, "memset(%x, %u, %u)\n", [dest], [val], [cnt]
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push eax ecx edi
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mov edi, dword [dest]
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mov al, byte [val]
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mov ecx, dword [cnt]
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rep stosb
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pop edi ecx eax
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ret
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endp
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@ -819,7 +819,7 @@ include 'detect/init_ata.inc'
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jmp ahci_code_end
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include 'blkdev/ahci.inc'
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ahci_code_end:
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call init_ahci
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call ahci_init
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;-----------------------------------------------------------------------------
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if 0
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mov ax, [BOOT.sys_disk]
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