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kolibri-ahci: refactoring

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git-svn-id: svn://kolibrios.org@9024 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Rustem Gimadutdinov (rgimad) 2021-07-08 14:27:05 +00:00
parent 478c96b635
commit 048b0de963
1 changed files with 18 additions and 39 deletions
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57
kernel/branches/kolibri-ahci/blkdev/ahci.inc
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@ -110,11 +110,9 @@ init_ahci:
DEBUGF 1, "K: found AHCI controller, (class, subcl, progif) = %x, bus = %x, device = %x, function = %x\n", eax, ebx, ecx, edx
; get BAR5 value, it is physical address
mov ah, [esi + PCIDEV.bus]
mov al, 2 ; read dword
mov bh, [esi + PCIDEV.devfn]
mov bl, PCI_REG_BAR5
call pci_read_reg
movzx eax, [esi + PCIDEV.bus]
movzx ebx, [esi + PCIDEV.devfn]
stdcall pci_read32, eax, ebx, PCI_REG_BAR5
DEBUGF 1, "K: AHCI controller BAR5 = %x\n", eax
; Map BAR5 to virtual memory
@ -124,48 +122,38 @@ init_ahci:
; Enable dma bus mastering, memory space access, clear the "disable interrupts" bit
; Usually, it is already done before us
mov ah, [esi + PCIDEV.bus]
mov al, 2 ; read dword
mov bh, [esi + PCIDEV.devfn]
mov bl, PCI_REG_STATUS_COMMAND
call pci_read_reg
movzx ebx, [esi + PCIDEV.bus]
movzx ebp, [esi + PCIDEV.devfn]
stdcall pci_read32, ebx, ebp, PCI_REG_STATUS_COMMAND
DEBUGF 1, "K: AHCI: pci_status_command = %x\nEnabling interrupts, DMA bus mastering and memory space access\n", eax
or eax, 0x06 ; pci.command |= 0x06 (dma bus mastering + memory space access)
btr eax, 10 ; clear the "disable interrupts" bit
DEBUGF 1, "K: AHCI: pci_status_command = %x\n", eax
mov ecx, eax
mov ah, [esi + PCIDEV.bus]
mov al, 2 ; write dword
mov bh, [esi + PCIDEV.devfn]
mov bl, PCI_REG_STATUS_COMMAND
call pci_write_reg
stdcall pci_write32, ebx, ebp, PCI_REG_STATUS_COMMAND, eax
; ; Print some register values to debug board
; mov esi, [ahci_controller + AHCI_DATA.abar]
; mov ebx, [esi + HBA_MEM.capability]
; mov ecx, [esi + HBA_MEM.global_host_control]
; mov edx, [esi + HBA_MEM.version]
; DEBUGF 1, "K: AHCI: HBA.cap = %x, HBA.ghc = %x, HBA_MEM.version = %x\n", ebx, ecx, edx
; DEBUGF 1, "K: AHCI: HBA.cap = %x, HBA.ghc = %x, HBA_MEM.version = %x\n", [esi + HBA_MEM.capability], [esi + HBA_MEM.global_host_control], [esi + HBA_MEM.version]
;-------------------------------------------------------
; Request BIOS/OS ownership handoff, if supported. (TODO check correctness)
mov esi, [ahci_controller + AHCI_DATA.abar]
;mov ebx, [esi + HBA_MEM.capability2]
;DEBUGF 1, "K: AHCI: HBA_MEM.cap2 = %x\n", ebx
bt dword [esi + HBA_MEM.capability2], bit_AHCI_HBA_CAP2_BOH
bt [esi + HBA_MEM.capability2], bit_AHCI_HBA_CAP2_BOH
jnc .end_handoff
DEBUGF 1, "K: AHCI: requesting AHCI ownership change...\n"
bts dword [esi + HBA_MEM.bohc], bit_AHCI_HBA_BOHC_OOS
bts [esi + HBA_MEM.bohc], bit_AHCI_HBA_BOHC_OOS
.wait_not_bos:
bt dword [esi + HBA_MEM.bohc], bit_AHCI_HBA_BOHC_BOS
bt [esi + HBA_MEM.bohc], bit_AHCI_HBA_BOHC_BOS
jc .wait_not_bos
mov ebx, 3
call delay_hs
; if Bios Busy is still set after 30 mS, wait 2 seconds.
bt dword [esi + HBA_MEM.bohc], bit_AHCI_HBA_BOHC_BB
bt [esi + HBA_MEM.bohc], bit_AHCI_HBA_BOHC_BB
jnc @f
mov ebx, 200
@ -177,30 +165,21 @@ init_ahci:
;-------------------------------------------------------
; enable the AHCI and reset it
bts dword [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_AHCI_ENABLE
bts dword [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_RESET
bts [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_AHCI_ENABLE
bts [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_RESET
; wait for reset to complete
.wait_reset:
bt dword [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_RESET
bt [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_RESET
jc .wait_reset
; enable the AHCI and interrupts
bts dword [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_AHCI_ENABLE
bts dword [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_INTERRUPT_ENABLE
bts [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_AHCI_ENABLE
bts [esi + HBA_MEM.global_host_control], bit_AHCI_HBA_GHC_INTERRUPT_ENABLE
mov ebx, 2
call delay_hs
mov ebx, [esi + HBA_MEM.capability]
mov ecx, [esi + HBA_MEM.capability2]
mov edx, [esi + HBA_MEM.version]
mov edi, [esi + HBA_MEM.global_host_control]
DEBUGF 1, "K: AHCI: caps: %x %x, ver: %x, ghc: %x\n", ebx, ecx, edx, edi
DEBUGF 1, "K: AHCI: caps: %x %x, ver: %x, ghc: %x\n", [esi + HBA_MEM.capability], [esi + HBA_MEM.capability2], [esi + HBA_MEM.version], [esi + HBA_MEM.global_host_control]
ret