forked from KolibriOS/kolibrios
1404 lines
48 KiB
PHP
1404 lines
48 KiB
PHP
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2021. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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PCI_REG_STATUS_COMMAND = 0x0004
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PCI_REG_BAR5 = 0x0024
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AHCI_DBGLVL = 0 ; debug output verbosity level. 0 - less verbose, 1 - more verbose
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; different SATA device signatures
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SATA_SIG_ATA = 0x00000101 ; SATA drive
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SATA_SIG_ATAPI = 0xEB140101 ; SATAPI drive
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SATA_SIG_SEMB = 0xC33C0101 ; Enclosure management bridge
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SATA_SIG_PM = 0x96690101 ; Port multiplier
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; Device type constants
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AHCI_DEV_NULL = 0
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AHCI_DEV_SATA = 1
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AHCI_DEV_SEMB = 2
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AHCI_DEV_PM = 3
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AHCI_DEV_SATAPI = 4
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; ATA commands
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ATA_IDENTIFY = 0xEC
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ATA_CMD_READ_DMA_EX = 0x25
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ATA_CMD_WRITE_DMA_EX = 0x35
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; ATA constants
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ATA_DEV_BUSY = 0x80
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ATA_DEV_DRQ = 0x08
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; ATAPI commands
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ATAPI_IDENTIFY = 0xA1
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PRDT_MAX_ENTRIES = 16 ;65535
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; bit_ prefix means that its index of bit
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; format: bit_AHCI_STR_REG_BIT
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bit_AHCI_HBA_CAP2_BOH = 0 ; Supports BIOS/OS Handoff
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bit_AHCI_HBA_BOHC_BOS = 0 ; BIOS-Owned Semaphore (BIOS owns controller)
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bit_AHCI_HBA_BOHC_OOS = 1 ; OS-Owned Semaphore (OS owns controller)
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bit_AHCI_HBA_BOHC_BB = 4 ; BIOS Busy (polling bit while BIOS cleans up
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bit_AHCI_HBA_GHC_AHCI_ENABLE = 31 ; Enable AHCI mode
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bit_AHCI_HBA_GHC_RESET = 0 ; Reset HBA
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bit_AHCI_HBA_GHC_INTERRUPT_ENABLE = 1 ; Enable interrupts from the HBA
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bit_AHCI_HBA_PxCMD_ST = 0
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bit_AHCI_HBA_PxCMD_FRE = 4
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bit_AHCI_HBA_PxCMD_FR = 14
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bit_AHCI_HBA_PxCMD_CR = 15
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bit_AHCI_HBA_PxIS_TFES = 30
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AHCI_HBA_PxCMD_ST = 1 shl 0
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AHCI_HBA_PxCMD_FRE = 1 shl 4
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AHCI_HBA_PxCMD_FR = 1 shl 14
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AHCI_HBA_PxCMD_CR = 1 shl 15
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bit_AHCI_H2D_FLAG_CMD = 7
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AHCI_HBA_PxSSTS_DET = 0xF
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AHCI_HBA_PORT_IPM_ACTIVE = 1
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AHCI_HBA_PxSSTS_DET_PRESENT = 3
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AHCI_MAX_PORTS = 32 ;
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;HBA_MEMORY_SIZE = 0x1100
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AHCI_PORT_TIMEOUT = 1000000
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; Frame Information Structure Types
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FIS_TYPE_REG_H2D = 0x27 ; Register FIS - host to device
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FIS_TYPE_REG_D2H = 0x34 ; Register FIS - device to host
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FIS_TYPE_DMA_ACT = 0x39 ; DMA activate FIS - device to host
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FIS_TYPE_DMA_SETUP = 0x41 ; DMA setup FIS - bidirectional
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FIS_TYPE_DATA = 0x46 ; Data FIS - bidirectional
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FIS_TYPE_BIST = 0x58 ; BIST activate FIS - bidirectional
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FIS_TYPE_PIO_SETUP = 0x5F ; PIO setup FIS - device to host
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FIS_TYPE_DEV_BITS = 0xA1 ; Set device bits FIS - device to host
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struct AHCI_DATA
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abar dd ? ; pointer to HBA Memory (BAR5) mapped to virtual kernelspace memory
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pcidev dd ? ; pointer to corresponding PCIDEV structure
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ends
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; Generic Host Control registers
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struct HBA_MEM
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cap dd ? ; 0x00, Host capabilities
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ghc dd ? ; 0x04, Global host control
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is dd ? ; 0x08, Interrupt status
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pi dd ? ; 0x0C, Port implemented
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version dd ? ; 0x10, Version
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ccc_ctl dd ? ; 0x14, Command completion coalescing control
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ccc_pts dd ? ; 0x18, Command completion coalescing ports
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em_loc dd ? ; 0x1C, Enclosure management location
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em_ctl dd ? ; 0x20, Enclosure management control
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cap2 dd ? ; 0x24, Host capabilities extended
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bohc dd ? ; 0x28, BIOS/OS handoff control and status
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reserved rb (0xA0-HBA_MEM.reserved) ; 0x2C - 0x9F, Reserved
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vendor rb (0x100-HBA_MEM.vendor) ; 0xA0 - 0xFF, Vendor specific
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ports rb (sizeof.HBA_PORT*AHCI_MAX_PORTS) ; 0x100 - 0x10FF, Port control registers, max AHCI_MAX_PORTS
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ends
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; Port Control registers
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struct HBA_PORT
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command_list_base_l dd ? ; 0x00, command list base address, 1K-byte aligned
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command_list_base_h dd ? ; 0x04, command list base address upper 32 bits, used on 64 bit systems
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fis_base_l dd ? ; 0x08, FIS base address, 256-byte aligned
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fis_base_h dd ? ; 0x0C, FIS base address upper 32 bits, used on 64 bit systems
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interrupt_status dd ? ; 0x10
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interrupt_enable dd ? ; 0x14
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command dd ? ; 0x18, command and status
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reserved0 dd ? ; 0x1C
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task_file_data dd ? ; 0x20
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signature dd ? ; 0x24
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sata_status dd ? ; 0x28, SATA status (SCR0:SStatus)
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sata_control dd ? ; 0x2C, SATA control (SCR2:SControl)
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sata_error dd ? ; 0x30, SATA error (SCR1:SError)
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sata_active dd ? ; 0x34, SATA active (SCR3:SActive)
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command_issue dd ? ; 0x38
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sata_notification dd ? ; 0x3C, SATA notification (SCR4:SNotification)
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fis_based_switch_control dd ? ; 0x40
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reserved1 rd 11 ; 0x44 - 0x6F
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vendor rd 4 ; 0x70 - 0x7F, vendor specific
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ends
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; Command header structure, size = 32 bytes
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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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rd 4 ; Reserved
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ends
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; Physical region descriptor table entry, size = 16 bytes
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struct HBA_PRDT_ENTRY
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dba dd ? ; Data base address
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dbau dd ? ; Data base address upper 32 bits
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dd ? ; Reserved
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flags dd ? ; 0bIR..RD..D, I (1 bit) - Interrupt on completion,
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; R (9 bits) - Reserved, D (22 bits) - Byte count, 4M max
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ends
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struct HBA_CMD_TBL
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cfis rb 64 ; 0x00, Command FIS
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acmd rb 16 ; 0x40, ATAPI command, 12 or 16 bytes
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rb 48 ; 0x50, Reserved
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prdt_entry HBA_PRDT_ENTRY ; 0x80, Physical region descriptor table entries, 0 ~ 65535
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; so, this structure is variable-length
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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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portno dd ? ; port index, 0..31
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drive_type db ? ; drive type
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sector_count dq ? ; number of sectors
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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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flags db ? ; 0bCRRRPPPP, C - 1: Command, 0: Control
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; R - Reserved, P - Port multiplier
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command db ? ; Command register
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featurel db ? ; Feature register, 7:0
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lba0 db ? ; LBA low register, 7:0
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lba1 db ? ; LBA mid register, 15:8
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lba2 db ? ; LBA high register, 23:16
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device db ? ; Device register
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lba3 db ? ; LBA register, 31:24
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lba4 db ? ; LBA register, 39:32
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lba5 db ? ; LBA register, 47:40
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featureh db ? ; Feature register, 15:8
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countl db ? ; Count register, 7:0
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counth db ? ; Count register, 15:8
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icc db ? ; Isochronous command completion
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control db ? ; Control register
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rb 4 ; Reserved
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ends
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; Register FIS – Device to Host
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struct FIS_REG_D2H
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fis_type db ? ; FIS_TYPE_REG_D2H
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flags db ? ; 0bRIRPPPP, P - Port multiplier, R - Reserved
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; I - Interrupt bit
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status db ? ; Status register
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error db ? ; Error register
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lba0 db ? ; LBA low register, 7:0
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lba1 db ? ; LBA mid register, 15:8
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lba2 db ? ; LBA high register, 23:16
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device db ? ; Device register
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lba3 db ? ; LBA register, 31:24
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lba4 db ? ; LBA register, 39:32
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lba5 db ? ; LBA register, 47:40
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db ? ; Reserved
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countl db ? ; Count register, 7:0
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counth db ? ; Count register, 15:8
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rb 2 ; Reserved
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rb 4 ; Reserved
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ends
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; Data FIS – Bidirectional
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struct FIS_DATA
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fis_type db ? ; FIS_TYPE_DATA
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flags db ? ; 0bRRRRPPPP, R - Reserved, P - Port multiplier
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rb 2 ; Reserved
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; DWORD 1 ~ N (?)
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data rd 1 ; Payload
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ends
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; PIO Setup – Device to Host
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struct FIS_PIO_SETUP
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fis_type db ? ; FIS_TYPE_PIO_SETUP
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flags db ? ; 0bRIDRPPPP, P - Port multiplier, R - Reserved
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; I - Interrupt bit, D - Data transfer direction, 1 - device to host
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status db ? ; Status register
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error db ? ; Error register
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lba0 db ? ; LBA low register, 7:0
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lba1 db ? ; LBA mid register, 15:8
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lba2 db ? ; LBA high register, 23:16
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device db ? ; Device register
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lba3 db ? ; LBA register, 31:24
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lba4 db ? ; LBA register, 39:32
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lba5 db ? ; LBA register, 47:40
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db ? ; Reserved
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countl db ? ; Count register, 7:0
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counth db ? ; Count register, 15:8
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db ? ; Reserved
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e_status db ? ; New value of status register
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tc dw ? ; Transfer count
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rb 2 ; Reserved
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ends
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; DMA Setup – Device to Host
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struct FIS_DMA_SETUP
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fis_type db ? ; FIS_TYPE_DMA_SETUP
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flags db ? ; 0bAIDRPPPP, A - Auto-activate. Specifies if DMA Activate FIS is needed,
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; I - Interrupt bit, D - Data transfer direction, 1 - device to host,
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; R - Reserved, P - Port multiplier
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rb 2 ; Reserved
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DMAbufferID dq ? ; DMA Buffer Identifier.
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; Used to Identify DMA buffer in host memory.
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; SATA Spec says host specific and not in Spec.
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; Trying AHCI spec might work.
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dd ? ; Reserved
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DMAbufOffset dd ? ; Byte offset into buffer. First 2 bits must be 0
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TransferCount dd ? ; Number of bytes to transfer. Bit 0 must be 0
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dd ? ; Reserved
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ends
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; Set device bits FIS - device to host
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struct FIS_DEV_BITS
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fis_type db ? ; FIS_TYPE_DEV_BITS
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flags db ? ; 0bNIRRPPPP, N - Notification, I - Interrupt,
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; R - Reserved, P - Port multiplier
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status db ? ; Status register
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error db ? ; Error register
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protocol dd ? ; Protocol
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ends
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struct HBA_FIS
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dsfis FIS_DMA_SETUP ; 0x00, DMA Setup FIS
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rb 4 ; padding
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psfis FIS_PIO_SETUP ; 0x20, PIO Setup FIS
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rb 12 ; padding
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rfis FIS_REG_D2H ; 0x40, Register - Device to Host FIS
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rb 4 ; padding
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sdbfis FIS_DEV_BITS ; 0x58, Set Device Bit FIS
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ufis rb 64 ; 0x60
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rb (0x100 - 0xA0) ; 0xA0, Reserved
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ends
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; --------------------------------------------------
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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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ahci_mutex MUTEX
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endg
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iglobal
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align 4
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ahci_callbacks:
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dd ahci_callbacks.end - ahci_callbacks
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dd 0 ; no close function
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dd 0 ; no closemedia function
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dd ahci_querymedia
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dd ahci_read
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dd ahci_write
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dd 0 ; no flush function
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dd 0 ; use default cache size
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.end:
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hd_name db 'hd', 0, 0, 0
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hd_counter dd 0
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endg
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; -----------------------------------------------------------------------
|
|||
|
|
; detect ahci controller and initialize
|
|||
|
|
align 4
|
|||
|
|
ahci_init:
|
|||
|
|
mov ecx, ahci_mutex
|
|||
|
|
call mutex_init
|
|||
|
|
|
|||
|
|
mov ecx, ahci_controller
|
|||
|
|
mov esi, pcidev_list
|
|||
|
|
.find_ahci_ctr:
|
|||
|
|
mov esi, [esi + PCIDEV.fd]
|
|||
|
|
cmp esi, pcidev_list
|
|||
|
|
jz .ahci_ctr_not_found
|
|||
|
|
mov eax, [esi + PCIDEV.class]
|
|||
|
|
;DEBUGF 1, "K: device class = %x\n", eax
|
|||
|
|
shr eax, 8 ; shift right because lowest 8 bits if ProgIf field
|
|||
|
|
cmp eax, 0x0106 ; 0x01 - Mass Storage Controller class, 0x06 - Serial ATA Controller subclass
|
|||
|
|
jz .ahci_ctr_found
|
|||
|
|
jmp .find_ahci_ctr
|
|||
|
|
|
|||
|
|
.ahci_ctr_not_found:
|
|||
|
|
DEBUGF 1, "K: AHCI controller not found\n"
|
|||
|
|
ret
|
|||
|
|
|
|||
|
|
.ahci_ctr_found:
|
|||
|
|
mov [ahci_controller + AHCI_DATA.pcidev], esi
|
|||
|
|
|
|||
|
|
mov eax, [esi+PCIDEV.class]
|
|||
|
|
movzx ebx, byte [esi+PCIDEV.bus]
|
|||
|
|
movzx ecx, byte [esi+PCIDEV.devfn]
|
|||
|
|
shr ecx, 3 ; get rid of 3 lowest bits (function code), the rest bits is device code
|
|||
|
|
movzx edx, byte [esi+PCIDEV.devfn]
|
|||
|
|
and edx, 00000111b ; get only 3 lowest bits (function code)
|
|||
|
|
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
|
|||
|
|
movzx ebx, [esi + PCIDEV.bus]
|
|||
|
|
movzx ebp, [esi + PCIDEV.devfn]
|
|||
|
|
stdcall pci_read32, ebx, ebp, PCI_REG_BAR5
|
|||
|
|
DEBUGF 1, "K: AHCI controller MMIO = %x\n", eax
|
|||
|
|
mov edi, eax
|
|||
|
|
|
|||
|
|
; get the size of MMIO region
|
|||
|
|
stdcall pci_write32, ebx, ebp, PCI_REG_BAR5, 0xFFFFFFFF
|
|||
|
|
stdcall pci_read32, ebx, ebp, PCI_REG_BAR5
|
|||
|
|
not eax
|
|||
|
|
inc eax
|
|||
|
|
DEBUGF 1, "K: AHCI: MMIO region size = 0x%x bytes\n", eax
|
|||
|
|
|
|||
|
|
; Map MMIO region to virtual memory
|
|||
|
|
stdcall map_io_mem, edi, eax, PG_SWR + PG_NOCACHE
|
|||
|
|
mov [ahci_controller + AHCI_DATA.abar], eax
|
|||
|
|
DEBUGF 1, "K: AHCI controller BAR5 mapped to virtual addr %x\n", eax
|
|||
|
|
|
|||
|
|
; Restore the original BAR5 value
|
|||
|
|
stdcall pci_write32, ebx, ebp, PCI_REG_BAR5, edi
|
|||
|
|
|
|||
|
|
; Enable dma bus mastering, memory space access, clear the "disable interrupts" bit
|
|||
|
|
; Usually, it is already done before us
|
|||
|
|
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
|
|||
|
|
stdcall pci_write32, ebx, ebp, PCI_REG_STATUS_COMMAND, eax
|
|||
|
|
|
|||
|
|
; ; Print some register values to debug board
|
|||
|
|
; mov esi, [ahci_controller + AHCI_DATA.abar]
|
|||
|
|
; DEBUGF 1, "K: AHCI: HBA.cap = %x, HBA.ghc = %x, HBA_MEM.version = %x\n", [esi + HBA_MEM.cap], [esi + HBA_MEM.ghc], [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.cap2]
|
|||
|
|
;DEBUGF 1, "K: AHCI: HBA_MEM.cap2 = %x\n", ebx
|
|||
|
|
bt [esi + HBA_MEM.cap2], bit_AHCI_HBA_CAP2_BOH
|
|||
|
|
jnc .end_handoff
|
|||
|
|
DEBUGF 1, "K: AHCI: requesting AHCI ownership change...\n"
|
|||
|
|
bts [esi + HBA_MEM.bohc], bit_AHCI_HBA_BOHC_OOS
|
|||
|
|
|
|||
|
|
.wait_not_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 [esi + HBA_MEM.bohc], bit_AHCI_HBA_BOHC_BB
|
|||
|
|
jnc @f
|
|||
|
|
|
|||
|
|
mov ebx, 200
|
|||
|
|
call delay_hs
|
|||
|
|
@@:
|
|||
|
|
DEBUGF 1, "K: AHCI: ownership change completed.\n"
|
|||
|
|
|
|||
|
|
.end_handoff:
|
|||
|
|
;-------------------------------------------------------
|
|||
|
|
|
|||
|
|
; enable the AHCI and reset it
|
|||
|
|
bts [esi + HBA_MEM.ghc], bit_AHCI_HBA_GHC_AHCI_ENABLE
|
|||
|
|
bts [esi + HBA_MEM.ghc], bit_AHCI_HBA_GHC_RESET
|
|||
|
|
|
|||
|
|
; wait for reset to complete
|
|||
|
|
.wait_reset:
|
|||
|
|
bt [esi + HBA_MEM.ghc], bit_AHCI_HBA_GHC_RESET
|
|||
|
|
jc .wait_reset
|
|||
|
|
|
|||
|
|
; enable the AHCI and interrupts
|
|||
|
|
bts [esi + HBA_MEM.ghc], bit_AHCI_HBA_GHC_AHCI_ENABLE
|
|||
|
|
bts [esi + HBA_MEM.ghc], bit_AHCI_HBA_GHC_INTERRUPT_ENABLE
|
|||
|
|
mov ebx, 2
|
|||
|
|
call delay_hs
|
|||
|
|
|
|||
|
|
DEBUGF 1, "K: AHCI: caps: %x %x, ver: %x, ghc: %x, pi: %x\n", [esi + HBA_MEM.cap], [esi + HBA_MEM.cap2], [esi + HBA_MEM.version], [esi + HBA_MEM.ghc], [esi + HBA_MEM.pi]
|
|||
|
|
|
|||
|
|
; TODO:
|
|||
|
|
; calculate irq line
|
|||
|
|
; ahciHBA->ghc |= AHCI_GHC_IE;
|
|||
|
|
; IDT::RegisterInterruptHandler(irq, InterruptHandler);
|
|||
|
|
; ahciHBA->is = 0xffffffff;
|
|||
|
|
|
|||
|
|
mov [hd_counter], 0
|
|||
|
|
xor ebx, ebx
|
|||
|
|
.detect_drives:
|
|||
|
|
cmp ebx, AHCI_MAX_PORTS
|
|||
|
|
jae .end_detect_drives
|
|||
|
|
|
|||
|
|
; if port with index ebx is not implemented then go to next
|
|||
|
|
mov ecx, [esi + HBA_MEM.pi]
|
|||
|
|
bt ecx, ebx
|
|||
|
|
jnc .continue_detect_drives
|
|||
|
|
|
|||
|
|
mov edi, ebx
|
|||
|
|
imul edi, sizeof.HBA_PORT
|
|||
|
|
add edi, HBA_MEM.ports
|
|||
|
|
add edi, esi
|
|||
|
|
; now edi - base of HBA_MEM.ports[ebx]
|
|||
|
|
|
|||
|
|
DEBUGF 1, "K: AHCI: port %d, cmd = %x, ssts = %x\n", ebx, [edi + HBA_PORT.command], [edi + HBA_PORT.sata_status]
|
|||
|
|
|
|||
|
|
; If port is not idle force it to be idle
|
|||
|
|
mov eax, [edi + HBA_PORT.command]
|
|||
|
|
and eax, (AHCI_HBA_PxCMD_ST or AHCI_HBA_PxCMD_CR or AHCI_HBA_PxCMD_FRE or AHCI_HBA_PxCMD_FR)
|
|||
|
|
test eax, eax
|
|||
|
|
jz @f
|
|||
|
|
|
|||
|
|
mov eax, edi
|
|||
|
|
DEBUGF 1, "ahci_stop_cmd..\n"
|
|||
|
|
call ahci_stop_cmd
|
|||
|
|
@@:
|
|||
|
|
; TODO: what is purpose of this block of code ?
|
|||
|
|
; Reset port, disable slumber and partial state
|
|||
|
|
; mov [edi + HBA_PORT.sata_control], 0x301
|
|||
|
|
; push ebx
|
|||
|
|
; mov ebx, 5 ; wait 50 ms
|
|||
|
|
; call delay_hs
|
|||
|
|
; pop ebx
|
|||
|
|
; mov [edi + HBA_PORT.sata_control], 0x300
|
|||
|
|
|
|||
|
|
; if(abar->cap & HBA_MEM_CAP_SSS)
|
|||
|
|
; {
|
|||
|
|
; abar->ports[i].cmd |= (HBA_PxCMD_SUD | HBA_PxCMD_POD | HBA_PxCMD_ICC);
|
|||
|
|
; Sleep(10);
|
|||
|
|
; }
|
|||
|
|
; rewritten to:
|
|||
|
|
bt [esi + HBA_MEM.cap], 27 ; check Supports Staggered Spin-up bit in capabilities
|
|||
|
|
jnc @f
|
|||
|
|
DEBUGF 1, "Supports Staggered Spin-up, spinning up the port..\n"
|
|||
|
|
or [edi + HBA_PORT.command], (0x0002 or 0x0004 or 0x10000000)
|
|||
|
|
push ebx
|
|||
|
|
mov ebx, 10 ; wait 100 ms
|
|||
|
|
call delay_hs
|
|||
|
|
pop ebx
|
|||
|
|
@@:
|
|||
|
|
; Clear interrupt status and error status
|
|||
|
|
mov [edi + HBA_PORT.sata_error], 0xFFFFFFFF
|
|||
|
|
mov [edi + HBA_PORT.interrupt_status], 0xFFFFFFFF
|
|||
|
|
|
|||
|
|
; ------------------------------------------
|
|||
|
|
|
|||
|
|
mov ecx, [edi + HBA_PORT.sata_status]
|
|||
|
|
shr ecx, 8
|
|||
|
|
and ecx, 0x0F
|
|||
|
|
cmp ecx, AHCI_HBA_PORT_IPM_ACTIVE
|
|||
|
|
jne .continue_detect_drives
|
|||
|
|
|
|||
|
|
mov ecx, [edi + HBA_PORT.sata_status]
|
|||
|
|
and ecx, AHCI_HBA_PxSSTS_DET
|
|||
|
|
cmp ecx, AHCI_HBA_PxSSTS_DET_PRESENT
|
|||
|
|
jne .continue_detect_drives
|
|||
|
|
|
|||
|
|
; DEBUGF 1, "K: AHCI: found drive at port %d, cmd = 0x%x, ssts = 0x%x, signature = 0x%x\n", ebx, [edi + HBA_PORT.command], [edi + HBA_PORT.sata_status], [edi + HBA_PORT.signature]
|
|||
|
|
|
|||
|
|
mov ecx, ebx
|
|||
|
|
imul ecx, sizeof.PORT_DATA
|
|||
|
|
add ecx, port_data_arr
|
|||
|
|
stdcall ahci_port_rebase, edi, ebx, ecx
|
|||
|
|
|
|||
|
|
; DEBUGF 1, "K: AHCI: After REBASING, signature = 0x%x\n", [edi + HBA_PORT.signature]
|
|||
|
|
|
|||
|
|
; Determine drive type by checking port signature
|
|||
|
|
.switch_sig:
|
|||
|
|
cmp [edi + HBA_PORT.signature], SATA_SIG_ATA
|
|||
|
|
mov eax, AHCI_DEV_SATA
|
|||
|
|
jz .end_switch_sig
|
|||
|
|
|
|||
|
|
cmp [edi + HBA_PORT.signature], SATA_SIG_ATAPI
|
|||
|
|
mov eax, AHCI_DEV_SATAPI
|
|||
|
|
jz .end_switch_sig
|
|||
|
|
|
|||
|
|
cmp [edi + HBA_PORT.signature], SATA_SIG_SEMB
|
|||
|
|
mov eax, AHCI_DEV_SEMB
|
|||
|
|
jz .end_switch_sig
|
|||
|
|
|
|||
|
|
cmp [edi + HBA_PORT.signature], SATA_SIG_PM
|
|||
|
|
mov eax, AHCI_DEV_PM
|
|||
|
|
jz .end_switch_sig
|
|||
|
|
|
|||
|
|
DEBUGF 1, "Unknown device signature\n"
|
|||
|
|
mov eax, AHCI_DEV_NULL
|
|||
|
|
.end_switch_sig:
|
|||
|
|
mov [ecx + PORT_DATA.drive_type], al
|
|||
|
|
|
|||
|
|
DEBUGF 1, "K: AHCI: found drive on port %u: TYPE = %u\n", ebx, [ecx + PORT_DATA.drive_type]
|
|||
|
|
|
|||
|
|
stdcall ahci_port_identify, ecx
|
|||
|
|
|
|||
|
|
cmp [ecx + PORT_DATA.drive_type], AHCI_DEV_SATA
|
|||
|
|
jne .after_add_disk ; skip adding disk code
|
|||
|
|
; register disk in system:
|
|||
|
|
|
|||
|
|
;stdcall ahci_read_first_sector, ecx
|
|||
|
|
|
|||
|
|
push ecx
|
|||
|
|
mov eax, [hd_counter]
|
|||
|
|
inc [hd_counter]
|
|||
|
|
xor edx, edx
|
|||
|
|
mov ecx, 10
|
|||
|
|
div ecx ; eax = hd_counter / 10, edx = hd_counter % 10
|
|||
|
|
test eax, eax
|
|||
|
|
jz .concat_one
|
|||
|
|
add al, '0'
|
|||
|
|
mov byte [hd_name + 2], al
|
|||
|
|
add dl, '0'
|
|||
|
|
mov byte [hd_name + 3], dl
|
|||
|
|
jmp .endif1
|
|||
|
|
.concat_one:
|
|||
|
|
add dl, '0'
|
|||
|
|
mov byte [hd_name + 2], dl
|
|||
|
|
.endif1:
|
|||
|
|
pop ecx
|
|||
|
|
|
|||
|
|
DEBUGF 1, "adding '%s'\n", hd_name
|
|||
|
|
|
|||
|
|
push ecx
|
|||
|
|
stdcall disk_add, ahci_callbacks, hd_name, ecx, 0
|
|||
|
|
pop ecx
|
|||
|
|
test eax, eax
|
|||
|
|
jz .disk_add_fail
|
|||
|
|
push ecx
|
|||
|
|
stdcall disk_media_changed, eax, 1 ; system will scan for partitions on disk
|
|||
|
|
pop ecx
|
|||
|
|
|
|||
|
|
jmp .after_add_disk
|
|||
|
|
|
|||
|
|
.disk_add_fail:
|
|||
|
|
DEBUGF 1, "Failed to add disk\n"
|
|||
|
|
.after_add_disk:
|
|||
|
|
|
|||
|
|
.continue_detect_drives:
|
|||
|
|
inc ebx
|
|||
|
|
jmp .detect_drives
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
.end_detect_drives:
|
|||
|
|
|
|||
|
|
|
|||
|
|
ret
|
|||
|
|
; -------------------------------------------------
|
|||
|
|
|
|||
|
|
modelstr rb 42
|
|||
|
|
; Identify drive on port ; TODO check
|
|||
|
|
; in: pdata - address of PORT_DATA structure
|
|||
|
|
proc ahci_port_identify stdcall, pdata: dword
|
|||
|
|
locals
|
|||
|
|
cmdslot dd ?
|
|||
|
|
cmdheader dd ?
|
|||
|
|
cmdtable dd ?
|
|||
|
|
buf_phys dd ?
|
|||
|
|
buf_virt dd ?
|
|||
|
|
endl
|
|||
|
|
|
|||
|
|
pushad
|
|||
|
|
|
|||
|
|
mov esi, [pdata] ; esi - address of PORT_DATA struct of port
|
|||
|
|
mov edi, [esi + PORT_DATA.port] ; edi - address of HBA_PORT struct of port
|
|||
|
|
|
|||
|
|
mov eax, edi
|
|||
|
|
call ahci_find_cmdslot
|
|||
|
|
|
|||
|
|
cmp eax, -1
|
|||
|
|
jne .cmdslot_found
|
|||
|
|
|
|||
|
|
DEBUGF 1, "No free cmdslot on port %u\n", [esi + PORT_DATA.portno]
|
|||
|
|
jmp .ret
|
|||
|
|
|
|||
|
|
.cmdslot_found:
|
|||
|
|
mov [cmdslot], eax
|
|||
|
|
; DEBUGF 1, "Found free cmdslot %u on port %u\n", [cmdslot], [esi + PORT_DATA.portno]
|
|||
|
|
|
|||
|
|
shl eax, BSF sizeof.HBA_CMD_HDR
|
|||
|
|
add eax, [esi + PORT_DATA.clb]
|
|||
|
|
mov [cmdheader], eax ; address of virtual mapping of command header
|
|||
|
|
mov eax, [cmdslot]
|
|||
|
|
mov eax, [esi + eax*4 + PORT_DATA.ctba_arr]
|
|||
|
|
mov [cmdtable], eax ; address of virtual mapping of command table of command header
|
|||
|
|
|
|||
|
|
stdcall _memset, eax, 0, sizeof.HBA_CMD_TBL
|
|||
|
|
|
|||
|
|
call alloc_page
|
|||
|
|
mov [buf_phys], eax
|
|||
|
|
|
|||
|
|
stdcall map_io_mem, eax, 4096, PG_NOCACHE + PG_SWR ; map to virt memory so we can work with it
|
|||
|
|
mov [buf_virt], eax
|
|||
|
|
|
|||
|
|
mov eax, [cmdtable]
|
|||
|
|
mov ebx, [buf_phys]
|
|||
|
|
mov dword [eax + HBA_CMD_TBL.prdt_entry + HBA_PRDT_ENTRY.dba], ebx
|
|||
|
|
mov dword [eax + HBA_CMD_TBL.prdt_entry + HBA_PRDT_ENTRY.dbau], 0
|
|||
|
|
and [eax + HBA_CMD_TBL.prdt_entry + HBA_PRDT_ENTRY.flags], not 0x3FFFFF ; zero out lower 22 bits, they used for byte count
|
|||
|
|
or [eax + HBA_CMD_TBL.prdt_entry + HBA_PRDT_ENTRY.flags], 512 - 1 ; reason why -1 see in spec on this field
|
|||
|
|
; or [eax + HBA_CMD_TBL.prdt_entry + HBA_PRDT_ENTRY.flags], 1 shl 31 ; enable interrupt on completion
|
|||
|
|
|
|||
|
|
mov eax, [cmdheader]
|
|||
|
|
and [eax + HBA_CMD_HDR.flags1], not 0x1F ; zero out lower 5 bits, they will be used for cfl
|
|||
|
|
or [eax + HBA_CMD_HDR.flags1], (sizeof.FIS_REG_H2D / 4) ; set command fis length in dwords
|
|||
|
|
movzx bx, [eax + HBA_CMD_HDR.flags1]
|
|||
|
|
btr bx, 6 ; flag W = 0
|
|||
|
|
mov [eax + HBA_CMD_HDR.flags1], bl
|
|||
|
|
movzx bx, [eax + HBA_CMD_HDR.flags2]
|
|||
|
|
btr bx, 2 ; flag C = 0
|
|||
|
|
mov [eax + HBA_CMD_HDR.flags2], bl
|
|||
|
|
mov [eax + HBA_CMD_HDR.prdtl], 1
|
|||
|
|
|
|||
|
|
mov eax, [cmdtable]
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.fis_type], FIS_TYPE_REG_H2D
|
|||
|
|
movzx ebx, byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.flags]
|
|||
|
|
bts ebx, bit_AHCI_H2D_FLAG_CMD ; Set Command bit in H2D FIS.
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.flags], bl
|
|||
|
|
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.command], ATA_IDENTIFY
|
|||
|
|
cmp [esi + PORT_DATA.drive_type], AHCI_DEV_SATAPI
|
|||
|
|
jne @f
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.command], ATAPI_IDENTIFY
|
|||
|
|
@@:
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.device], 0
|
|||
|
|
|
|||
|
|
; Wait on previous command to complete, before issuing new command.
|
|||
|
|
stdcall ahci_port_wait, edi, AHCI_PORT_TIMEOUT
|
|||
|
|
; DEBUGF 1, "eax = %x\n", eax
|
|||
|
|
; TODO check eax error value
|
|||
|
|
|
|||
|
|
mov eax, [cmdslot]
|
|||
|
|
bts [edi + HBA_PORT.command_issue], eax ; Issue the command
|
|||
|
|
|
|||
|
|
; Wait for command completion
|
|||
|
|
stdcall ahci_port_cmd_wait, edi, eax;, AHCI_PORT_CMD_TIMEOUT
|
|||
|
|
; DEBUGF 1, " eax = %x\n", eax
|
|||
|
|
; TODO check eax error value
|
|||
|
|
|
|||
|
|
; DEBUGF 1, "sata_error register = 0x%x\n", [edi + HBA_PORT.sata_error]
|
|||
|
|
|
|||
|
|
mov esi, [buf_virt]
|
|||
|
|
add esi, 27*2
|
|||
|
|
mov edi, modelstr
|
|||
|
|
mov ecx, ((46-27)+1)*2
|
|||
|
|
cld
|
|||
|
|
rep movsb
|
|||
|
|
mov byte [edi], 0
|
|||
|
|
|
|||
|
|
stdcall swap_bytes_in_words, modelstr, (46-27)+1
|
|||
|
|
DEBUGF 1, "IDENTIFICATION RESULT: MODEL = %s\n", modelstr
|
|||
|
|
|
|||
|
|
mov esi, [buf_virt]
|
|||
|
|
mov eax, [esi + 200]
|
|||
|
|
mov edx, [esi + 200 + 4]
|
|||
|
|
DEBUGF 1, "lba48 mode sector count = 0x%x:%x\n", edx, eax
|
|||
|
|
|
|||
|
|
mov ebx, [pdata]
|
|||
|
|
mov dword [ebx + PORT_DATA.sector_count], eax
|
|||
|
|
mov dword [ebx + PORT_DATA.sector_count + 4], edx
|
|||
|
|
|
|||
|
|
shrd eax, edx, 11 ; i.e *512 / 1024 / 1024, 512 - sector size
|
|||
|
|
DEBUGF 1, "disk capacity = %u MiB ", eax
|
|||
|
|
shrd eax, edx, 10 ; / 1024
|
|||
|
|
DEBUGF 1, "= %u GiB\n", eax
|
|||
|
|
.ret:
|
|||
|
|
popad
|
|||
|
|
ret
|
|||
|
|
endp
|
|||
|
|
|
|||
|
|
proc ahci_querymedia stdcall, pdata, mediainfo
|
|||
|
|
push ecx edx
|
|||
|
|
mov eax, [mediainfo]
|
|||
|
|
mov edx, [pdata]
|
|||
|
|
mov [eax + DISKMEDIAINFO.Flags], 0
|
|||
|
|
mov [eax + DISKMEDIAINFO.SectorSize], 512
|
|||
|
|
mov ecx, dword[edx + PORT_DATA.sector_count]
|
|||
|
|
mov dword [eax + DISKMEDIAINFO.Capacity], ecx
|
|||
|
|
mov ecx, dword[edx + PORT_DATA.sector_count + 4]
|
|||
|
|
mov dword [eax + DISKMEDIAINFO.Capacity + 4], ecx
|
|||
|
|
pop edx ecx
|
|||
|
|
xor eax, eax
|
|||
|
|
ret
|
|||
|
|
endp
|
|||
|
|
|
|||
|
|
; Read/write sectors
|
|||
|
|
; return value: 0 = success, otherwise = error
|
|||
|
|
proc ahci_rw_sectors stdcall pdata: dword, vbuf: dword, startsector: qword, numsectors: dword, is_write: dword
|
|||
|
|
locals
|
|||
|
|
cmdslot dd ?
|
|||
|
|
cmdheader dd ?
|
|||
|
|
cmdtable dd ?
|
|||
|
|
vbuf_orig dd ?
|
|||
|
|
vbuf_len dd ?
|
|||
|
|
phys_region_start dd ?
|
|||
|
|
new_phys_region_start dd ?
|
|||
|
|
cur_prd dd ?
|
|||
|
|
cur_phys dd ?
|
|||
|
|
dbc dd ?
|
|||
|
|
cur_phys_page dd ?
|
|||
|
|
next_phys_page dd ?
|
|||
|
|
cur_antioffset dd ?
|
|||
|
|
prdt_bytes_total dd ?
|
|||
|
|
endl
|
|||
|
|
|
|||
|
|
pushad
|
|||
|
|
|
|||
|
|
DEBUGF AHCI_DBGLVL, " ahci_rw_sectors: buffer = 0x%x, startsector = 0x%x:%x, numsectors = %u, is_write = %u\n", [vbuf], [startsector], [startsector + 4], [numsectors], [is_write]:1
|
|||
|
|
|
|||
|
|
mov esi, [pdata] ; esi - address of PORT_DATA struct of port
|
|||
|
|
mov edi, [esi + PORT_DATA.port] ; edi - address of HBA_PORT struct of port
|
|||
|
|
mov eax, edi
|
|||
|
|
call ahci_find_cmdslot
|
|||
|
|
cmp eax, -1
|
|||
|
|
jne .cmdslot_found
|
|||
|
|
|
|||
|
|
DEBUGF AHCI_DBGLVL, "No free cmdslot on port %u\n", [esi + PORT_DATA.portno]
|
|||
|
|
jmp .fail
|
|||
|
|
|
|||
|
|
.cmdslot_found:
|
|||
|
|
mov [cmdslot], eax
|
|||
|
|
DEBUGF AHCI_DBGLVL, "Found free cmdslot %u on port %u\n", [cmdslot], [esi + PORT_DATA.portno]
|
|||
|
|
|
|||
|
|
shl eax, BSF sizeof.HBA_CMD_HDR
|
|||
|
|
add eax, [esi + PORT_DATA.clb]
|
|||
|
|
mov [cmdheader], eax ; address of virtual mapping of command header
|
|||
|
|
mov eax, [cmdslot]
|
|||
|
|
mov eax, [esi + eax*4 + PORT_DATA.ctba_arr]
|
|||
|
|
mov [cmdtable], eax ; address of virtual mapping of command table of command header
|
|||
|
|
|
|||
|
|
mov eax, [cmdheader]
|
|||
|
|
and [eax + HBA_CMD_HDR.flags1], not 0x1F ; zero out lower 5 bits, they will be used for cfl
|
|||
|
|
or [eax + HBA_CMD_HDR.flags1], (sizeof.FIS_REG_H2D / 4) ; set command fis length in dwords
|
|||
|
|
movzx bx, [eax + HBA_CMD_HDR.flags1]
|
|||
|
|
btr bx, 6 ; flag W = 0
|
|||
|
|
cmp [is_write], 1 ; if is_write then set W flag
|
|||
|
|
jne @f
|
|||
|
|
bts bx, 6
|
|||
|
|
@@:
|
|||
|
|
mov [eax + HBA_CMD_HDR.flags1], bl
|
|||
|
|
movzx bx, [eax + HBA_CMD_HDR.flags2]
|
|||
|
|
btr bx, 2 ; flag C = 0
|
|||
|
|
mov [eax + HBA_CMD_HDR.flags2], bl
|
|||
|
|
|
|||
|
|
mov eax, [vbuf]
|
|||
|
|
mov [vbuf_orig], eax
|
|||
|
|
mov ebx, [numsectors]
|
|||
|
|
shl ebx, 9 ; *= 512
|
|||
|
|
mov [vbuf_len], ebx
|
|||
|
|
DEBUGF AHCI_DBGLVL, "vbuf_len = %u bytes\n", ebx
|
|||
|
|
|
|||
|
|
mov ebx, [vbuf]
|
|||
|
|
and ebx, 0xFFF
|
|||
|
|
mov eax, [vbuf]
|
|||
|
|
call get_pg_addr
|
|||
|
|
add eax, ebx
|
|||
|
|
mov [phys_region_start], eax
|
|||
|
|
mov [prdt_bytes_total], 0
|
|||
|
|
mov [cur_prd], 0
|
|||
|
|
.fill_prdt:
|
|||
|
|
cmp [vbuf_len], 0
|
|||
|
|
jbe .fill_prdt_end
|
|||
|
|
|
|||
|
|
mov eax, [vbuf]
|
|||
|
|
call get_pg_addr
|
|||
|
|
mov [cur_phys_page], eax
|
|||
|
|
mov eax, [vbuf]
|
|||
|
|
add eax, 4096
|
|||
|
|
call get_pg_addr
|
|||
|
|
mov [next_phys_page], eax
|
|||
|
|
mov eax, 4096
|
|||
|
|
mov ebx, [vbuf]
|
|||
|
|
and ebx, 0xFFF
|
|||
|
|
sub eax, ebx
|
|||
|
|
mov [cur_antioffset], eax
|
|||
|
|
mov eax, [cur_phys_page]
|
|||
|
|
add eax, ebx
|
|||
|
|
mov [cur_phys], eax
|
|||
|
|
|
|||
|
|
.check_if1:
|
|||
|
|
mov eax, [vbuf_len]
|
|||
|
|
cmp eax, [cur_antioffset]
|
|||
|
|
ja .check_if2
|
|||
|
|
|
|||
|
|
mov eax, [cur_phys]
|
|||
|
|
sub eax, [phys_region_start]
|
|||
|
|
add eax, [vbuf_len]
|
|||
|
|
dec eax
|
|||
|
|
mov [dbc], eax
|
|||
|
|
mov eax, [next_phys_page]
|
|||
|
|
mov [new_phys_region_start], eax
|
|||
|
|
jmp .add_prd
|
|||
|
|
|
|||
|
|
.check_if2:
|
|||
|
|
mov eax, [cur_phys]
|
|||
|
|
add eax, [cur_antioffset]
|
|||
|
|
cmp eax, [next_phys_page]
|
|||
|
|
je .check_if3
|
|||
|
|
|
|||
|
|
mov eax, [cur_phys]
|
|||
|
|
add eax, [cur_antioffset]
|
|||
|
|
sub eax, [phys_region_start]
|
|||
|
|
dec eax
|
|||
|
|
mov [dbc], eax
|
|||
|
|
mov eax, [next_phys_page]
|
|||
|
|
mov [new_phys_region_start], eax
|
|||
|
|
jmp .add_prd
|
|||
|
|
|
|||
|
|
.check_if3:
|
|||
|
|
mov eax, [cur_phys]
|
|||
|
|
add eax, [cur_antioffset]
|
|||
|
|
sub eax, [phys_region_start]
|
|||
|
|
cmp eax, 4*1024*1024
|
|||
|
|
jb .after_ifs
|
|||
|
|
|
|||
|
|
mov [dbc], 4*1024*1024 - 1
|
|||
|
|
mov eax, [phys_region_start]
|
|||
|
|
add eax, 4*1024*1024
|
|||
|
|
jmp .add_prd
|
|||
|
|
|
|||
|
|
.after_ifs:
|
|||
|
|
jmp .step_next
|
|||
|
|
|
|||
|
|
.add_prd:
|
|||
|
|
mov ebx, [cur_prd]
|
|||
|
|
shl ebx, BSF sizeof.HBA_PRDT_ENTRY
|
|||
|
|
add ebx, [cmdtable]
|
|||
|
|
add ebx, HBA_CMD_TBL.prdt_entry ; now ebx - address of 'th prdt_entry
|
|||
|
|
|
|||
|
|
DEBUGF AHCI_DBGLVL, "Added PRDT entry: dba = 0x%x, dbc = %u\n", [phys_region_start], [dbc]
|
|||
|
|
mov eax, [phys_region_start]
|
|||
|
|
mov [ebx + HBA_PRDT_ENTRY.dba], eax
|
|||
|
|
mov [ebx + HBA_PRDT_ENTRY.dbau], 0
|
|||
|
|
and [ebx + HBA_PRDT_ENTRY.flags], not 0x3FFFFF ; zero out lower 22 bits, they used for byte count
|
|||
|
|
mov eax, [dbc]
|
|||
|
|
or [ebx + HBA_PRDT_ENTRY.flags], eax
|
|||
|
|
|
|||
|
|
inc [cur_prd]
|
|||
|
|
mov eax, [dbc]
|
|||
|
|
inc eax
|
|||
|
|
add [prdt_bytes_total], eax
|
|||
|
|
mov eax, [new_phys_region_start]
|
|||
|
|
mov [phys_region_start], eax
|
|||
|
|
cmp [cur_prd], PRDT_MAX_ENTRIES
|
|||
|
|
jne @f
|
|||
|
|
jmp .fill_prdt_end
|
|||
|
|
@@:
|
|||
|
|
|
|||
|
|
.step_next:
|
|||
|
|
mov eax, [vbuf_len]
|
|||
|
|
cmp eax, [cur_antioffset]
|
|||
|
|
jbe @f
|
|||
|
|
mov eax, [cur_antioffset]
|
|||
|
|
@@:
|
|||
|
|
add [vbuf], eax
|
|||
|
|
sub [vbuf_len], eax
|
|||
|
|
jmp .fill_prdt
|
|||
|
|
|
|||
|
|
.fill_prdt_end:
|
|||
|
|
|
|||
|
|
mov eax, [cmdheader]
|
|||
|
|
mov ebx, [cur_prd]
|
|||
|
|
DEBUGF AHCI_DBGLVL, " PRDTL = %u\n", ebx
|
|||
|
|
mov [eax + HBA_CMD_HDR.prdtl], bx
|
|||
|
|
|
|||
|
|
mov eax, [prdt_bytes_total]
|
|||
|
|
DEBUGF AHCI_DBGLVL, " prdt_bytes_total = %u\n", eax
|
|||
|
|
shr eax, 9 ; /= 512
|
|||
|
|
mov [numsectors], eax
|
|||
|
|
|
|||
|
|
mov eax, [cmdtable]
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.fis_type], FIS_TYPE_REG_H2D
|
|||
|
|
movzx ebx, byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.flags]
|
|||
|
|
bts ebx, bit_AHCI_H2D_FLAG_CMD ; Set Command bit in H2D FIS.
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.flags], bl
|
|||
|
|
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.command], ATA_CMD_READ_DMA_EX
|
|||
|
|
cmp [is_write], 1
|
|||
|
|
jne @f
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.command], ATA_CMD_WRITE_DMA_EX
|
|||
|
|
@@:
|
|||
|
|
mov ebx, dword [startsector]
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.lba0], bl
|
|||
|
|
shr ebx, 8
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.lba1], bl
|
|||
|
|
shr ebx, 8
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.lba2], bl
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.device], 1 shl 6 ; LBA mode
|
|||
|
|
shr ebx, 8
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.lba3], bl
|
|||
|
|
mov ebx, dword [startsector + 4]
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.lba4], bl
|
|||
|
|
shr ebx, 8
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.lba5], bl
|
|||
|
|
|
|||
|
|
mov ebx, [numsectors]
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.countl], bl
|
|||
|
|
shr ebx, 8
|
|||
|
|
mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.counth], bl
|
|||
|
|
|
|||
|
|
; Wait on previous command to complete, before issuing new command.
|
|||
|
|
stdcall ahci_port_wait, edi, AHCI_PORT_TIMEOUT
|
|||
|
|
|
|||
|
|
mov eax, [cmdslot]
|
|||
|
|
bts [edi + HBA_PORT.command_issue], eax ; Issue the command
|
|||
|
|
|
|||
|
|
; Wait for command completion
|
|||
|
|
stdcall ahci_port_cmd_wait, edi, eax;, AHCI_PORT_CMD_TIMEOUT
|
|||
|
|
|
|||
|
|
DEBUGF AHCI_DBGLVL, "sata_error register = 0x%x\n", [edi + HBA_PORT.sata_error]
|
|||
|
|
|
|||
|
|
DEBUGF AHCI_DBGLVL, "R/W completed\n"
|
|||
|
|
|
|||
|
|
; xor ecx, ecx
|
|||
|
|
; mov esi, [vbuf_orig]
|
|||
|
|
; .print_data:
|
|||
|
|
; cmp ecx, 512
|
|||
|
|
; jae .end_print_data
|
|||
|
|
|
|||
|
|
; mov al, byte [esi + ecx]
|
|||
|
|
; mov byte [tmpstr], al
|
|||
|
|
; mov byte [tmpstr + 1], 0
|
|||
|
|
; DEBUGF 1, "0x%x(%s) ", al:2, tmpstr
|
|||
|
|
|
|||
|
|
; inc ecx
|
|||
|
|
; jmp .print_data
|
|||
|
|
; .end_print_data:
|
|||
|
|
; DEBUGF 1, "\n"
|
|||
|
|
|
|||
|
|
popad
|
|||
|
|
;mov eax, [cmdheader]
|
|||
|
|
;mov eax, [eax + HBA_CMD_HDR.prdbc]
|
|||
|
|
mov eax, [numsectors]
|
|||
|
|
shl eax, 9 ; *= 512
|
|||
|
|
ret
|
|||
|
|
|
|||
|
|
.fail:
|
|||
|
|
popad
|
|||
|
|
xor eax, eax
|
|||
|
|
ret
|
|||
|
|
endp
|
|||
|
|
tmpstr rb 16
|
|||
|
|
|
|||
|
|
; Read sectors
|
|||
|
|
; return value: 0 = success, otherwise = error
|
|||
|
|
proc ahci_read stdcall pdata: dword, buffer: dword, startsector: qword, numsectors_ptr:dword
|
|||
|
|
locals
|
|||
|
|
numsectors dd ?
|
|||
|
|
endl
|
|||
|
|
|
|||
|
|
pushad
|
|||
|
|
|
|||
|
|
mov ecx, ahci_mutex
|
|||
|
|
call mutex_lock
|
|||
|
|
|
|||
|
|
mov eax, [numsectors_ptr]
|
|||
|
|
mov eax, [eax]
|
|||
|
|
mov [numsectors], eax
|
|||
|
|
DEBUGF AHCI_DBGLVL, " ahci_read: buffer = 0x%x, startsector = 0x%x:%x, numsectors = %u\n", [buffer], [startsector], [startsector + 4], eax
|
|||
|
|
|
|||
|
|
xor ecx, ecx ; how many sectors have been read
|
|||
|
|
.read_loop:
|
|||
|
|
cmp ecx, [numsectors]
|
|||
|
|
jae .read_loop_end
|
|||
|
|
|
|||
|
|
; mov eax, [buffer]
|
|||
|
|
; call get_pg_addr
|
|||
|
|
; DEBUGF 1, "buf phys = 0x%x\n", eax
|
|||
|
|
; mov eax, [buffer]
|
|||
|
|
; add eax, 4096
|
|||
|
|
; call get_pg_addr
|
|||
|
|
; DEBUGF 1, "buf + 4096 phys = 0x%x\n", eax
|
|||
|
|
|
|||
|
|
mov ebx, [numsectors]
|
|||
|
|
sub ebx, ecx
|
|||
|
|
; DEBUGF 1, "buffer = 0x%x\n", [buffer]
|
|||
|
|
stdcall ahci_rw_sectors, [pdata], [buffer], dword [startsector], dword [startsector + 4], ebx, 0
|
|||
|
|
;; TODO check if eax == 0 ?
|
|||
|
|
|
|||
|
|
DEBUGF AHCI_DBGLVL, " EAX = 0x%x\n", eax
|
|||
|
|
|
|||
|
|
add [buffer], eax
|
|||
|
|
shr eax, 9 ; /= 512
|
|||
|
|
add ecx, eax
|
|||
|
|
add dword [startsector], eax
|
|||
|
|
adc dword [startsector + 4], 0
|
|||
|
|
|
|||
|
|
jmp .read_loop
|
|||
|
|
.read_loop_end:
|
|||
|
|
|
|||
|
|
mov ecx, ahci_mutex
|
|||
|
|
call mutex_unlock
|
|||
|
|
|
|||
|
|
popad
|
|||
|
|
xor eax, eax
|
|||
|
|
ret
|
|||
|
|
endp
|
|||
|
|
|
|||
|
|
; Write sectors
|
|||
|
|
; return value: 0 = success, otherwise = error
|
|||
|
|
proc ahci_write stdcall pdata: dword, buffer: dword, startsector: qword, numsectors_ptr:dword
|
|||
|
|
locals
|
|||
|
|
numsectors dd ?
|
|||
|
|
endl
|
|||
|
|
|
|||
|
|
pushad
|
|||
|
|
|
|||
|
|
mov ecx, ahci_mutex
|
|||
|
|
call mutex_lock
|
|||
|
|
|
|||
|
|
mov eax, [numsectors_ptr]
|
|||
|
|
mov eax, [eax]
|
|||
|
|
mov [numsectors], eax
|
|||
|
|
DEBUGF AHCI_DBGLVL, " ahci_write: buffer = 0x%x, startsector = 0x%x:%x, numsectors = %u\n", [buffer], [startsector], [startsector + 4], eax
|
|||
|
|
|
|||
|
|
xor ecx, ecx ; how many sectors have been read
|
|||
|
|
.write_loop:
|
|||
|
|
cmp ecx, [numsectors]
|
|||
|
|
jae .write_loop_end
|
|||
|
|
|
|||
|
|
mov ebx, [numsectors]
|
|||
|
|
sub ebx, ecx
|
|||
|
|
stdcall ahci_rw_sectors, [pdata], [buffer], dword [startsector], dword [startsector + 4], ebx, 1
|
|||
|
|
;; TODO check if eax == 0 ?
|
|||
|
|
|
|||
|
|
DEBUGF AHCI_DBGLVL, " EAX = 0x%x\n", eax
|
|||
|
|
|
|||
|
|
add [buffer], eax
|
|||
|
|
shr eax, 9 ; /= 512
|
|||
|
|
add ecx, eax
|
|||
|
|
add dword [startsector], eax
|
|||
|
|
adc dword [startsector + 4], 0
|
|||
|
|
|
|||
|
|
jmp .write_loop
|
|||
|
|
.write_loop_end:
|
|||
|
|
|
|||
|
|
mov ecx, ahci_mutex
|
|||
|
|
call mutex_unlock
|
|||
|
|
|
|||
|
|
popad
|
|||
|
|
xor eax, eax
|
|||
|
|
ret
|
|||
|
|
endp
|
|||
|
|
|
|||
|
|
; Start command engine
|
|||
|
|
; in: eax - address of HBA_PORT structure
|
|||
|
|
ahci_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
|
|||
|
|
; maybe here call ahci flush cmd ? TODO (see seakernel)
|
|||
|
|
ret
|
|||
|
|
|
|||
|
|
; Stop command engine
|
|||
|
|
; in: eax - address of HBA_PORT structure
|
|||
|
|
ahci_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
|
|||
|
|
|
|||
|
|
; waits until the port is no longer busy before issuing a new command
|
|||
|
|
; in: [port] - address of HBA_PORT structure
|
|||
|
|
; [timeout] - timeout (in iterations)
|
|||
|
|
; out: eax = 0 if success, 1 if timeout expired
|
|||
|
|
proc ahci_port_wait stdcall, port: dword, timeout: dword
|
|||
|
|
push ebx ecx
|
|||
|
|
mov ebx, [port]
|
|||
|
|
xor ecx, ecx
|
|||
|
|
.wait:
|
|||
|
|
cmp ecx, [timeout]
|
|||
|
|
jae .wait_end
|
|||
|
|
mov eax, [ebx + HBA_PORT.task_file_data]
|
|||
|
|
and eax, ATA_DEV_BUSY or ATA_DEV_DRQ
|
|||
|
|
test eax, eax
|
|||
|
|
jz .wait_end
|
|||
|
|
inc ecx
|
|||
|
|
jmp .wait
|
|||
|
|
.wait_end:
|
|||
|
|
xor eax, eax
|
|||
|
|
DEBUGF AHCI_DBGLVL, "port wait counter = %u\n", ecx
|
|||
|
|
cmp ecx, [timeout] ; if they equal it means port is hung
|
|||
|
|
setz al
|
|||
|
|
pop ecx ebx
|
|||
|
|
ret
|
|||
|
|
endp
|
|||
|
|
|
|||
|
|
|
|||
|
|
; Wait for command completion
|
|||
|
|
; in: [port] - address of HBA_PORT structure
|
|||
|
|
; [cmdslot] - number of command slot
|
|||
|
|
; out: eax = 0 if success, 1 if error
|
|||
|
|
proc ahci_port_cmd_wait stdcall, port: dword, cmdslot: dword ;, timeout: dword
|
|||
|
|
push ebx ecx edx
|
|||
|
|
mov ebx, [port]
|
|||
|
|
mov edx, [cmdslot]
|
|||
|
|
xor eax, eax
|
|||
|
|
xor ecx, ecx
|
|||
|
|
.wait:
|
|||
|
|
bt [ebx + HBA_PORT.command_issue], edx
|
|||
|
|
jnc .wait_end
|
|||
|
|
bt [ebx + HBA_PORT.interrupt_status], bit_AHCI_HBA_PxIS_TFES ; check for Task File Error
|
|||
|
|
jc .error
|
|||
|
|
inc ecx
|
|||
|
|
jmp .wait
|
|||
|
|
.wait_end:
|
|||
|
|
DEBUGF AHCI_DBGLVL, "port cmd wait counter = %u\n", ecx
|
|||
|
|
bt [ebx + HBA_PORT.interrupt_status], bit_AHCI_HBA_PxIS_TFES ; check for Task File Error
|
|||
|
|
jc .error
|
|||
|
|
jmp .ret
|
|||
|
|
.error:
|
|||
|
|
mov eax, 1
|
|||
|
|
.ret:
|
|||
|
|
pop edx ecx ebx
|
|||
|
|
ret
|
|||
|
|
endp
|
|||
|
|
|
|||
|
|
; ; The commands may not take effect until the command
|
|||
|
|
; ; register is read again by software, because reasons.
|
|||
|
|
; ; in: eax - address of HBA_PORT structure
|
|||
|
|
; ; out: eax - command register value
|
|||
|
|
; ahci_flush_cmd:
|
|||
|
|
; mov eax, [eax + HBA_PORT.command]
|
|||
|
|
; ret
|
|||
|
|
|
|||
|
|
; ; Send command to port
|
|||
|
|
; ; in: eax - address of HBA_PORT structure
|
|||
|
|
; ; ebx - index of command slot
|
|||
|
|
; ahci_send_cmd:
|
|||
|
|
; push ecx
|
|||
|
|
; mov [eax + HBA_PORT.interrupt_status], 0xFFFFFFFF
|
|||
|
|
|
|||
|
|
; mov cl, bl
|
|||
|
|
; mov [eax + HBA_PORT.command_issue], 1
|
|||
|
|
; shl [eax + HBA_PORT.command_issue], cl
|
|||
|
|
|
|||
|
|
; call ahci_flush_cmd
|
|||
|
|
; pop ecx
|
|||
|
|
; ret
|
|||
|
|
|
|||
|
|
; ---------------------------------------------------------------------------
|
|||
|
|
; in: port - address of HBA_PORT structure
|
|||
|
|
; portno - port index (0..31)
|
|||
|
|
; pdata - address of PORT_DATA structure
|
|||
|
|
proc ahci_port_rebase stdcall, port: dword, portno: dword, pdata: dword
|
|||
|
|
locals
|
|||
|
|
phys_page1 dd ?
|
|||
|
|
virt_page1 dd ?
|
|||
|
|
phys_page23 dd ?
|
|||
|
|
virt_page23 dd ?
|
|||
|
|
tmp dd ?
|
|||
|
|
endl
|
|||
|
|
|
|||
|
|
pushad
|
|||
|
|
|
|||
|
|
DEBUGF 1, "Rebasing port %u\n", [portno]
|
|||
|
|
|
|||
|
|
mov eax, [port]
|
|||
|
|
call ahci_stop_cmd
|
|||
|
|
|
|||
|
|
; Command list entry size = 32
|
|||
|
|
; Command list entry maxim count = 32
|
|||
|
|
; Command list maxim size = 32*32 = 1K per port
|
|||
|
|
call alloc_page
|
|||
|
|
mov [phys_page1], eax
|
|||
|
|
|
|||
|
|
stdcall map_io_mem, eax, 4096, PG_NOCACHE + PG_SWR ; map to virt memory so we can work with it
|
|||
|
|
mov [virt_page1], eax
|
|||
|
|
|
|||
|
|
mov esi, [port]
|
|||
|
|
mov ebx, [phys_page1]
|
|||
|
|
mov [esi + HBA_PORT.command_list_base_l], ebx ; set the command list base
|
|||
|
|
mov [esi + HBA_PORT.command_list_base_h], 0 ; zero upper 32 bits of addr cause we are 32 bit os
|
|||
|
|
|
|||
|
|
mov edi, [pdata]
|
|||
|
|
mov ebx, [virt_page1]
|
|||
|
|
mov [edi + PORT_DATA.clb], ebx ; set pdata->clb
|
|||
|
|
|
|||
|
|
mov eax, [port]
|
|||
|
|
mov [edi + PORT_DATA.port], eax ; set pdata->port
|
|||
|
|
mov eax, [portno] ; set pdata->portno
|
|||
|
|
mov [edi + PORT_DATA.portno], eax
|
|||
|
|
|
|||
|
|
stdcall _memset, ebx, 0, 1024 ; zero out the command list
|
|||
|
|
|
|||
|
|
; FIS entry size = 256 bytes per port
|
|||
|
|
mov eax, [phys_page1]
|
|||
|
|
add eax, 1024
|
|||
|
|
mov [esi + HBA_PORT.fis_base_l], eax
|
|||
|
|
mov [esi + HBA_PORT.fis_base_h], 0
|
|||
|
|
|
|||
|
|
mov eax, [virt_page1]
|
|||
|
|
add eax, 1024
|
|||
|
|
mov [edi + PORT_DATA.fb], eax ; set pdata->fb
|
|||
|
|
stdcall _memset, eax, 0, 256 ; zero out
|
|||
|
|
|
|||
|
|
stdcall alloc_pages, 32*(64 + 16 + 48 + PRDT_MAX_ENTRIES*16)/4096
|
|||
|
|
mov [phys_page23], eax
|
|||
|
|
stdcall map_io_mem, eax, 32*(64 + 16 + 48 + PRDT_MAX_ENTRIES*16), PG_NOCACHE + PG_SWR
|
|||
|
|
mov [virt_page23], eax
|
|||
|
|
|
|||
|
|
; Command table size = N*32 per port
|
|||
|
|
mov edx, [edi + PORT_DATA.clb] ; cmdheader array base
|
|||
|
|
xor ecx, ecx
|
|||
|
|
|
|||
|
|
.for1:
|
|||
|
|
cmp ecx, 32
|
|||
|
|
jae .for1_end
|
|||
|
|
|
|||
|
|
mov ebx, ecx
|
|||
|
|
shl ebx, BSF sizeof.HBA_CMD_HDR
|
|||
|
|
add ebx, edx ; ebx = cmdheader[ecx]
|
|||
|
|
|
|||
|
|
mov [ebx + HBA_CMD_HDR.prdtl], PRDT_MAX_ENTRIES ; prdt entries per command table
|
|||
|
|
|
|||
|
|
; bytes per command table = 64+16+48+PRDT_MAX_ENTRIES*16 = N
|
|||
|
|
|
|||
|
|
push edx
|
|||
|
|
|
|||
|
|
; cmdheader[ecx].ctba = phys_page23 + ecx*N
|
|||
|
|
mov [ebx + HBA_CMD_HDR.ctba], ecx
|
|||
|
|
mov edx, [ebx + HBA_CMD_HDR.ctba]
|
|||
|
|
imul edx, (64+16+48+PRDT_MAX_ENTRIES*16) ; *= N
|
|||
|
|
mov [ebx + HBA_CMD_HDR.ctba], edx
|
|||
|
|
mov eax, [ebx + HBA_CMD_HDR.ctba]
|
|||
|
|
mov edx, [phys_page23]
|
|||
|
|
add [ebx + HBA_CMD_HDR.ctba], edx
|
|||
|
|
|
|||
|
|
add eax, [virt_page23]
|
|||
|
|
mov [tmp], eax ; tmp = virt_page23 + ecx*N
|
|||
|
|
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*N
|
|||
|
|
|
|||
|
|
pop edx
|
|||
|
|
|
|||
|
|
mov [ebx + HBA_CMD_HDR.ctbau], 0
|
|||
|
|
stdcall _memset, [eax], 0, 64+16+48+PRDT_MAX_ENTRIES*16 ; zero out
|
|||
|
|
|
|||
|
|
inc ecx
|
|||
|
|
jmp .for1
|
|||
|
|
.for1_end:
|
|||
|
|
|
|||
|
|
mov eax, [port]
|
|||
|
|
call ahci_start_cmd
|
|||
|
|
|
|||
|
|
DEBUGF 1, "End rebasing port %u\n", [portno]
|
|||
|
|
popad
|
|||
|
|
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
|
|||
|
|
;DEBUGF DBG_INFO, "memset(%x, %u, %u)\n", [dest], [val], [cnt]
|
|||
|
|
push eax ecx edi
|
|||
|
|
mov edi, dword [dest]
|
|||
|
|
mov al, byte [val]
|
|||
|
|
mov ecx, dword [cnt]
|
|||
|
|
rep stosb
|
|||
|
|
pop edi ecx eax
|
|||
|
|
ret
|
|||
|
|
endp
|
|||
|
|
|
|||
|
|
; Swaps byte order in words
|
|||
|
|
; base - address of first word
|
|||
|
|
; len - how many words to swap bytes in
|
|||
|
|
; doesnt clobber any registers
|
|||
|
|
proc swap_bytes_in_words stdcall, base: dword, len: dword
|
|||
|
|
push eax ebx ecx
|
|||
|
|
xor ecx, ecx
|
|||
|
|
mov ebx, [base]
|
|||
|
|
.loop:
|
|||
|
|
cmp ecx, [len]
|
|||
|
|
jae .loop_end
|
|||
|
|
mov ax, word [ebx + ecx*2]
|
|||
|
|
xchg ah, al
|
|||
|
|
mov word [ebx + ecx*2], ax
|
|||
|
|
inc ecx
|
|||
|
|
jmp .loop
|
|||
|
|
.loop_end:
|
|||
|
|
pop ecx ebx eax
|
|||
|
|
ret
|
|||
|
|
endp
|