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kolibri-ahci:

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- added more structures
- added function ahci_find_cmdslot
- small fixes

git-svn-id: svn://kolibrios.org@9069 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Rustem Gimadutdinov (rgimad) 2021-07-20 16:25:00 +00:00
parent 9ea50cc779
commit 774aee343f
1 changed files with 72 additions and 5 deletions
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75
kernel/branches/kolibri-ahci/blkdev/ahci.inc
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@ -105,6 +105,22 @@ struct HBA_CMD_HDR
rsv1 rd 4 ; Reserved
ends
struct HBA_PRDT_ENTRY
dba dd ? ; Data base address
dbau dd ? ; Data base address upper 32 bits
rsv0 dd ? ; Reserved
_flags dd ? ; 0bIR..RD..D, I (1 bit) - Interrupt on completion,
; R (9 bits) - Reserved, D (22 bits) - Byte count, 4M max
ends
struct HBA_CMD_TBL
cfis rb 64 ; 0x00, Command FIS
acmd rb 16 ; 0x40, ATAPI command, 12 or 16 bytes
rsv rb 48 ; 0x50, Reserved
prdt_entry HBA_PRDT_ENTRY ; 0x80, Physical region descriptor table entries, 0 ~ 65535
; so, this structure is variable-length
ends
; Contains virtual mappings for port phys memory regions
struct PORT_DATA
clb dd ? ; Command list base
@ -234,6 +250,23 @@ struct FIS_DEV_BITS
protocol dd ? ; Protocol
ends
struct HBA_FIS
dsfis FIS_DMA_SETUP ; 0x00, DMA Setup FIS
pad0 rb 4 ;
psfis FIS_PIO_SETUP ; 0x20, PIO Setup FIS
pad1 rb 12 ;
rfis FIS_REG_D2H ; 0x40, Register - Device to Host FIS
pad2 rb 4 ;
sdbfis FIS_DEV_BITS ; 0x58, Set Device Bit FIS
ufis rb 64 ; 0x60
rsv rb (0x100 - 0xA0) ; 0xA0
ends
; --------------------------------------------------
uglobal
align 4
@ -546,10 +579,7 @@ proc ahci_port_rebase stdcall, port: dword, portno: dword, pdata: dword
add eax, [virt_page23]
mov [tmp], eax ; tmp = virt_page23 + ecx*256
mov eax, ecx
shl eax, BSF 4 ; *= 4
add eax, PORT_DATA.ctba_arr
add eax, edi ; eax = pdata->ctba_arr[ecx]
lea eax, [ecx*4 + edi + PORT_DATA.ctba_arr] ; eax = pdata->ctba_arr[ecx]
mov edx, [tmp]
mov [eax], edx ; pdata->ctba_arr[ecx] = virt_page23 + ecx*256
@ -570,6 +600,43 @@ proc ahci_port_rebase stdcall, port: dword, portno: dword, pdata: dword
ret
endp
; ----------------------------------------------------------- ; TODO check
; Find a free command list slot
; in: eax - address of HBA_PORT structure
; out: eax - if not found -1, else slot index
ahci_find_cmdslot:
push ebx ecx edx esi
; If not set in SACT and CI, the slot is free
mov ebx, [eax + HBA_PORT.sata_active]
or ebx, [eax + HBA_PORT.command_issue] ; ebx = slots
mov esi, [ahci_controller + AHCI_DATA.abar]
mov edx, [esi + HBA_MEM.cap]
shr edx, 8
and edx, 0xf
DEBUGF 1, "Number of Command Slots on each port = %u\n", edx
xor ecx, ecx
.for1:
cmp ecx, edx
jae .for1_end
; if ((slots&1) == 0) return i;
bt ebx, 0
jc .cont1
mov eax, ecx
jmp .ret
.cont1:
shr ebx, 1
inc ecx
jmp .for1
.for1_end:
DEBUGF 1, "Cannot find free command list entry\n"
mov eax, -1
.ret:
pop esi edx ecx ebx
ret
proc _memset stdcall, dest:dword, val:byte, cnt:dword ; doesnt clobber any registers