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kolibri-ahci:

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- add functions start_cmd and stop_cmd
- small changes

git-svn-id: svn://kolibrios.org@9065 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Rustem Gimadutdinov (rgimad) 2021-07-13 20:20:23 +00:00
parent a8fd8dac68
commit 760c9f36c4
1 changed files with 37 additions and 0 deletions
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37
kernel/branches/kolibri-ahci/blkdev/ahci.inc
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@ -22,6 +22,11 @@ bit_AHCI_HBA_GHC_AHCI_ENABLE = 31 ; Enable AHCI mode
bit_AHCI_HBA_GHC_RESET = 0 ; Reset HBA
bit_AHCI_HBA_GHC_INTERRUPT_ENABLE = 1 ; Enable interrupts from the HBA
bit_AHCI_HBA_PxCMD_ST = 0
bit_AHCI_HBA_PxCMD_FRE = 4
bit_AHCI_HBA_PxCMD_FR = 14
bit_AHCI_HBA_PxCMD_CR = 15
AHCI_HBA_PxSSTS_DET = 0xF
AHCI_HBA_PORT_IPM_ACTIVE = 1
AHCI_HBA_PxSSTS_DET_PRESENT = 3
@ -374,4 +379,36 @@ init_ahci:
ret
; -------------------------------------------------
; TODO: implement function port_rebase
; Start command engine
; in: eax - address of HBA_PORT structure
start_cmd:
.wait_cr: ; Wait until CR (bit15) is cleared
bt [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_CR
jc .wait_cr
; Set FRE (bit4) and ST (bit0)
bts [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_FRE
bts [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_ST
ret
; Stop command engine
; in: eax - address of HBA_PORT structure
stop_cmd:
btr [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_ST ; Clear ST (bit0)
btr [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_FRE ; Clear FRE (bit4)
.wait_fr_cr: ; Wait until FR (bit14), CR (bit15) are cleared
bt [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_FR
jc .wait_fr_cr
bt [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_CR
jc .wait_fr_cr
ret