927 lines
27 KiB
C
927 lines
27 KiB
C
// Low level ATA disk access
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//
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// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
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// Copyright (C) 2002 MandrakeSoft S.A.
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//
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// This file may be distributed under the terms of the GNU LGPLv3 license.
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#include "types.h" // u8
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#include "ioport.h" // inb
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#include "util.h" // dprintf
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#include "cmos.h" // inb_cmos
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#include "pic.h" // enable_hwirq
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#include "biosvar.h" // GET_EBDA
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#include "pci.h" // pci_find_class
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#include "pci_ids.h" // PCI_CLASS_STORAGE_OTHER
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#include "pci_regs.h" // PCI_INTERRUPT_LINE
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#include "disk.h" // struct ata_s
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#include "atabits.h" // ATA_CB_STAT
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#define TIMEOUT 0
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#define BSY 1
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#define NOT_BSY 2
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#define NOT_BSY_DRQ 3
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#define NOT_BSY_NOT_DRQ 4
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#define NOT_BSY_RDY 5
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#define IDE_SECTOR_SIZE 512
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#define CDROM_SECTOR_SIZE 2048
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#define IDE_TIMEOUT 32000u //32 seconds max for IDE ops
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struct ata_s ATA VAR16_32;
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/****************************************************************
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* Helper functions
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****************************************************************/
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// Wait for the specified ide state
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static int
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await_ide(u8 when_done, u16 base, u16 timeout)
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{
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u64 end = calc_future_tsc(timeout);
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for (;;) {
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u8 status = inb(base+ATA_CB_STAT);
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u8 result = 0;
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if (when_done == BSY)
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result = status & ATA_CB_STAT_BSY;
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else if (when_done == NOT_BSY)
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result = !(status & ATA_CB_STAT_BSY);
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else if (when_done == NOT_BSY_DRQ)
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result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_DRQ);
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else if (when_done == NOT_BSY_NOT_DRQ)
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result = !(status & ATA_CB_STAT_BSY) && !(status & ATA_CB_STAT_DRQ);
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else if (when_done == NOT_BSY_RDY)
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result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_RDY);
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if (result)
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return status;
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if (status & ATA_CB_STAT_ERR) {
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dprintf(1, "await_ide: ERROR (TIMEOUT,BSY,!BSY,!BSY_DRQ"
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",!BSY_!DRQ,!BSY_RDY) %d status=%x timeout=%d\n"
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, when_done, status, timeout);
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return -1;
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}
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if (rdtscll() >= end)
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break;
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}
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dprintf(1, "IDE time out\n");
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return -2;
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}
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// Wait for ide state - pauses for one ata cycle first.
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static __always_inline int
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pause_await_ide(u8 when_done, u16 iobase1, u16 iobase2, u16 timeout)
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{
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// Wait one PIO transfer cycle.
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inb(iobase2 + ATA_CB_ASTAT);
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return await_ide(when_done, iobase1, timeout);
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}
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// Wait for ide state - pause for 400ns first.
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static __always_inline int
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ndelay_await_ide(u8 when_done, u16 iobase1, u16 timeout)
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{
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ndelay(400);
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return await_ide(when_done, iobase1, timeout);
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}
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// Reset a drive
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void
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ata_reset(int driveid)
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{
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u8 channel = driveid / 2;
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u8 slave = driveid % 2;
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u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
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u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
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// Reset
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// 8.2.1 (a) -- set SRST in DC
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outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST, iobase2+ATA_CB_DC);
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// 8.2.1 (b) -- wait for BSY
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int status = await_ide(BSY, iobase1, 20);
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dprintf(6, "ata_reset(1) status=%x\n", status);
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// 8.2.1 (f) -- clear SRST
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outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
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// 8.2.1 (g) -- check for sc==sn==0x01
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// select device
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outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
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mdelay(50);
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u8 sc = inb(iobase1+ATA_CB_SC);
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u8 sn = inb(iobase1+ATA_CB_SN);
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// For predetermined ATA drives - wait for ready.
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if (sc==0x01 && sn==0x01) {
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u8 type=GET_GLOBAL(ATA.devices[driveid].type);
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if (type == ATA_TYPE_ATA)
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await_ide(NOT_BSY_RDY, iobase1, IDE_TIMEOUT);
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}
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// 8.2.1 (h) -- wait for not BSY
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status = await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
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dprintf(6, "ata_reset(2) status=%x\n", status);
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// Enable interrupts
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outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
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}
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/****************************************************************
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* ATA send command
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****************************************************************/
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struct ata_pio_command {
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u8 feature;
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u8 sector_count;
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u8 lba_low;
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u8 lba_mid;
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u8 lba_high;
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u8 device;
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u8 command;
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u8 sector_count2;
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u8 lba_low2;
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u8 lba_mid2;
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u8 lba_high2;
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};
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// Send an ata command to the drive.
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static int
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send_cmd(int driveid, struct ata_pio_command *cmd)
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{
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u8 channel = driveid / 2;
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u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
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u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
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int status = inb(iobase1 + ATA_CB_STAT);
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if (status & ATA_CB_STAT_BSY)
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return -3;
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// Disable interrupts
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outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
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// Select device
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u8 device = inb(iobase1 + ATA_CB_DH);
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outb(cmd->device, iobase1 + ATA_CB_DH);
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if ((device ^ cmd->device) & (1 << 4))
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// Wait for device to become active.
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mdelay(50);
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if (cmd->command & 0x04) {
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outb(0x00, iobase1 + ATA_CB_FR);
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outb(cmd->sector_count2, iobase1 + ATA_CB_SC);
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outb(cmd->lba_low2, iobase1 + ATA_CB_SN);
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outb(cmd->lba_mid2, iobase1 + ATA_CB_CL);
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outb(cmd->lba_high2, iobase1 + ATA_CB_CH);
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}
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outb(cmd->feature, iobase1 + ATA_CB_FR);
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outb(cmd->sector_count, iobase1 + ATA_CB_SC);
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outb(cmd->lba_low, iobase1 + ATA_CB_SN);
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outb(cmd->lba_mid, iobase1 + ATA_CB_CL);
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outb(cmd->lba_high, iobase1 + ATA_CB_CH);
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outb(cmd->command, iobase1 + ATA_CB_CMD);
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status = ndelay_await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
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if (status < 0)
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return status;
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if (status & ATA_CB_STAT_ERR) {
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dprintf(6, "send_cmd : read error\n");
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return -4;
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}
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if (!(status & ATA_CB_STAT_DRQ)) {
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dprintf(6, "send_cmd : DRQ not set (status %02x)\n"
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, (unsigned) status);
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return -5;
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}
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return 0;
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}
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/****************************************************************
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* ATA transfers
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****************************************************************/
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// Read and discard x number of bytes from an io channel.
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static void
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insx_discard(int mode, int iobase1, int bytes)
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{
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int count, i;
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if (mode == ATA_MODE_PIO32) {
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count = bytes / 4;
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for (i=0; i<count; i++)
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inl(iobase1);
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} else {
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count = bytes / 2;
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for (i=0; i<count; i++)
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inw(iobase1);
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}
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}
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// Transfer 'count' blocks (of 'blocksize' bytes) to/from drive
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// 'driveid'. If 'skipfirst' or 'skiplast' is set then the first
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// and/or last block may be partially transferred. This function is
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// inlined because all the callers use different forms and because the
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// large number of parameters would consume a lot of stack space.
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static __always_inline int
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ata_transfer(int driveid, int iswrite, int count, int blocksize
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, int skipfirst, int skiplast, void *far_buffer)
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{
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dprintf(16, "ata_transfer id=%d write=%d count=%d bs=%d"
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" skipf=%d skipl=%d buf=%p\n"
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, driveid, iswrite, count, blocksize
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, skipfirst, skiplast, far_buffer);
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// Reset count of transferred data
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SET_EBDA(sector_count, 0);
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u8 channel = driveid / 2;
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u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
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u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
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u8 mode = GET_GLOBAL(ATA.devices[driveid].mode);
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int current = 0;
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int status;
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for (;;) {
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int bsize = blocksize;
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if (skipfirst && current == 0) {
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insx_discard(mode, iobase1, skipfirst);
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bsize -= skipfirst;
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}
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if (skiplast && current == count-1)
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bsize -= skiplast;
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if (iswrite) {
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// Write data to controller
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dprintf(16, "Write sector id=%d dest=%p\n", driveid, far_buffer);
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if (mode == ATA_MODE_PIO32)
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outsl_far(iobase1, far_buffer, bsize / 4);
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else
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outsw_far(iobase1, far_buffer, bsize / 2);
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} else {
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// Read data from controller
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dprintf(16, "Read sector id=%d dest=%p\n", driveid, far_buffer);
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if (mode == ATA_MODE_PIO32)
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insl_far(iobase1, far_buffer, bsize / 4);
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else
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insw_far(iobase1, far_buffer, bsize / 2);
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}
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far_buffer += bsize;
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if (skiplast && current == count-1)
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insx_discard(mode, iobase1, skiplast);
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status = pause_await_ide(NOT_BSY, iobase1, iobase2, IDE_TIMEOUT);
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if (status < 0)
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// Error
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return status;
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current++;
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SET_EBDA(sector_count, current);
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if (current == count)
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break;
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status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ
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| ATA_CB_STAT_ERR);
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if (status != (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ)) {
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dprintf(6, "ata_transfer : more sectors left (status %02x)\n"
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, (unsigned) status);
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return -6;
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}
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}
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status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF
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| ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR);
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if (!iswrite)
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status &= ~ATA_CB_STAT_DF;
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if (status != ATA_CB_STAT_RDY ) {
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dprintf(6, "ata_transfer : no sectors left (status %02x)\n"
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, (unsigned) status);
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return -7;
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}
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// Enable interrupts
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outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
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return 0;
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}
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static noinline int
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ata_transfer_disk(const struct disk_op_s *op)
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{
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return ata_transfer(op->driveid, op->command == ATA_CMD_WRITE_SECTORS
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, op->count, IDE_SECTOR_SIZE, 0, 0, op->far_buffer);
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}
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static noinline int
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ata_transfer_cdrom(const struct disk_op_s *op)
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{
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return ata_transfer(op->driveid, 0, op->count, CDROM_SECTOR_SIZE
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, 0, 0, op->far_buffer);
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}
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static noinline int
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ata_transfer_cdemu(const struct disk_op_s *op, int before, int after)
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{
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int vcount = op->count * 4 - before - after;
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int ret = ata_transfer(op->driveid, 0, op->count, CDROM_SECTOR_SIZE
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, before*512, after*512, op->far_buffer);
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if (ret) {
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SET_EBDA(sector_count, 0);
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return ret;
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}
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SET_EBDA(sector_count, vcount);
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return 0;
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}
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/****************************************************************
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* ATA hard drive functions
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****************************************************************/
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static noinline int
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send_cmd_disk(const struct disk_op_s *op)
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{
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u8 slave = op->driveid % 2;
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u64 lba = op->lba;
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struct ata_pio_command cmd;
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memset(&cmd, 0, sizeof(cmd));
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cmd.command = op->command;
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if (op->count >= (1<<8) || lba + op->count >= (1<<28)) {
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cmd.sector_count2 = op->count >> 8;
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cmd.lba_low2 = lba >> 24;
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cmd.lba_mid2 = lba >> 32;
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cmd.lba_high2 = lba >> 40;
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cmd.command |= 0x04;
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lba &= 0xffffff;
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}
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cmd.feature = 0;
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cmd.sector_count = op->count;
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cmd.lba_low = lba;
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cmd.lba_mid = lba >> 8;
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cmd.lba_high = lba >> 16;
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cmd.device = ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
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| ((lba >> 24) & 0xf) | ATA_CB_DH_LBA);
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return send_cmd(op->driveid, &cmd);
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}
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// Read/write count blocks from a harddrive.
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__always_inline int
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ata_cmd_data(struct disk_op_s *op)
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{
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int ret = send_cmd_disk(op);
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if (ret)
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return ret;
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return ata_transfer_disk(op);
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}
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/****************************************************************
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* ATAPI functions
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****************************************************************/
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// Low-level atapi command transmit function.
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static __always_inline int
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send_atapi_cmd(int driveid, u8 *cmdbuf, u8 cmdlen, u16 blocksize)
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{
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u8 channel = driveid / 2;
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u8 slave = driveid % 2;
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u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
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u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
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struct ata_pio_command cmd;
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cmd.sector_count = 0;
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cmd.feature = 0;
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cmd.lba_low = 0;
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cmd.lba_mid = blocksize;
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cmd.lba_high = blocksize >> 8;
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cmd.device = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0;
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cmd.command = ATA_CMD_PACKET;
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int ret = send_cmd(driveid, &cmd);
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if (ret)
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return ret;
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// Send command to device
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outsw_far(iobase1, MAKE_FARPTR(GET_SEG(SS), (u32)cmdbuf), cmdlen / 2);
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int status = pause_await_ide(NOT_BSY_DRQ, iobase1, iobase2, IDE_TIMEOUT);
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if (status < 0)
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return status;
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return 0;
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}
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// Low-level cdrom read atapi command transmit function.
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static int
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send_cmd_cdrom(const struct disk_op_s *op)
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{
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u8 atacmd[12];
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memset(atacmd, 0, sizeof(atacmd));
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atacmd[0]=0x28; // READ command
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atacmd[7]=(op->count & 0xff00) >> 8; // Sectors
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atacmd[8]=(op->count & 0x00ff);
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atacmd[2]=(op->lba & 0xff000000) >> 24; // LBA
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atacmd[3]=(op->lba & 0x00ff0000) >> 16;
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atacmd[4]=(op->lba & 0x0000ff00) >> 8;
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atacmd[5]=(op->lba & 0x000000ff);
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return send_atapi_cmd(op->driveid, atacmd, sizeof(atacmd)
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, CDROM_SECTOR_SIZE);
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}
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// Read sectors from the cdrom.
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__always_inline int
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cdrom_read(struct disk_op_s *op)
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{
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int ret = send_cmd_cdrom(op);
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if (ret)
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return ret;
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return ata_transfer_cdrom(op);
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}
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// Pretend the cdrom has 512 byte sectors (instead of 2048) and read
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// sectors.
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__always_inline int
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cdrom_read_512(struct disk_op_s *op)
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{
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u32 vlba = op->lba;
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u32 vcount = op->count;
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u32 lba = op->lba = vlba / 4;
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u32 velba = vlba + vcount - 1;
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u32 elba = velba / 4;
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op->count = elba - lba + 1;
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int before = vlba % 4;
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int after = 3 - (velba % 4);
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dprintf(16, "cdrom_read_512: id=%d vlba=%d vcount=%d buf=%p lba=%d elba=%d"
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" count=%d before=%d after=%d\n"
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, op->driveid, vlba, vcount, op->far_buffer, lba, elba
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, op->count, before, after);
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int ret = send_cmd_cdrom(op);
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if (ret)
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return ret;
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return ata_transfer_cdemu(op, before, after);
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}
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// Send a simple atapi command to a drive.
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|
int
|
|
ata_cmd_packet(int driveid, u8 *cmdbuf, u8 cmdlen
|
|
, u32 length, void *far_buffer)
|
|
{
|
|
int ret = send_atapi_cmd(driveid, cmdbuf, cmdlen, length);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ata_transfer(driveid, 0, 1, length, 0, 0, far_buffer);
|
|
}
|
|
|
|
|
|
/****************************************************************
|
|
* ATA detect and init
|
|
****************************************************************/
|
|
|
|
static void
|
|
report_model(int driveid, u8 *buffer)
|
|
{
|
|
u8 model[41];
|
|
|
|
// Read model name
|
|
int i;
|
|
for (i=0; i<40; i+=2) {
|
|
model[i] = buffer[i+54+1];
|
|
model[i+1] = buffer[i+54];
|
|
}
|
|
|
|
// Reformat
|
|
model[40] = 0x00;
|
|
for (i=39; i>0; i--) {
|
|
if (model[i] != 0x20)
|
|
break;
|
|
model[i] = 0x00;
|
|
}
|
|
|
|
u8 channel = driveid / 2;
|
|
u8 slave = driveid % 2;
|
|
// XXX - model on stack not %cs
|
|
printf("ata%d %s: %s", channel, slave ? " slave" : "master", model);
|
|
}
|
|
|
|
static u8
|
|
get_ata_version(u8 *buffer)
|
|
{
|
|
u16 ataversion = *(u16*)&buffer[160];
|
|
u8 version;
|
|
for (version=15; version>0; version--)
|
|
if (ataversion & (1<<version))
|
|
break;
|
|
return version;
|
|
}
|
|
|
|
static void
|
|
init_drive_atapi(int driveid)
|
|
{
|
|
SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_ATAPI);
|
|
|
|
// Temporary values to do the transfer
|
|
SET_GLOBAL(ATA.devices[driveid].device,ATA_DEVICE_CDROM);
|
|
SET_GLOBAL(ATA.devices[driveid].mode, ATA_MODE_PIO16);
|
|
|
|
// Now we send a IDENTIFY command to ATAPI device
|
|
u8 buffer[0x0200];
|
|
memset(buffer, 0, sizeof(buffer));
|
|
struct disk_op_s dop;
|
|
dop.driveid = driveid;
|
|
dop.command = ATA_CMD_IDENTIFY_DEVICE_PACKET;
|
|
dop.count = 1;
|
|
dop.lba = 1;
|
|
dop.far_buffer = MAKE_FARPTR(GET_SEG(SS), (u32)buffer);
|
|
u16 ret = ata_cmd_data(&dop);
|
|
if (ret != 0)
|
|
BX_PANIC("ata-detect: Failed to detect ATAPI device\n");
|
|
|
|
u8 type = buffer[1] & 0x1f;
|
|
u8 removable = (buffer[0] & 0x80) ? 1 : 0;
|
|
u8 mode = buffer[96] ? ATA_MODE_PIO32 : ATA_MODE_PIO16;
|
|
u16 blksize = CDROM_SECTOR_SIZE;
|
|
|
|
SET_GLOBAL(ATA.devices[driveid].device, type);
|
|
SET_GLOBAL(ATA.devices[driveid].removable, removable);
|
|
SET_GLOBAL(ATA.devices[driveid].mode, mode);
|
|
SET_GLOBAL(ATA.devices[driveid].blksize, blksize);
|
|
|
|
// fill cdidmap
|
|
u8 cdcount = GET_GLOBAL(ATA.cdcount);
|
|
SET_GLOBAL(ATA.idmap[1][cdcount], driveid);
|
|
SET_GLOBAL(ATA.cdcount, ++cdcount);
|
|
|
|
report_model(driveid, buffer);
|
|
u8 version = get_ata_version(buffer);
|
|
if (GET_GLOBAL(ATA.devices[driveid].device)==ATA_DEVICE_CDROM)
|
|
printf(" ATAPI-%d CD-Rom/DVD-Rom\n", version);
|
|
else
|
|
printf(" ATAPI-%d Device\n", version);
|
|
}
|
|
|
|
static void
|
|
fill_fdpt(int driveid)
|
|
{
|
|
if (driveid > 1)
|
|
return;
|
|
|
|
u16 nlc = GET_GLOBAL(ATA.devices[driveid].lchs.cylinders);
|
|
u16 nlh = GET_GLOBAL(ATA.devices[driveid].lchs.heads);
|
|
u16 nlspt = GET_GLOBAL(ATA.devices[driveid].lchs.spt);
|
|
|
|
u16 npc = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders);
|
|
u16 nph = GET_GLOBAL(ATA.devices[driveid].pchs.heads);
|
|
u16 npspt = GET_GLOBAL(ATA.devices[driveid].pchs.spt);
|
|
|
|
struct extended_bios_data_area_s *ebda = get_ebda_ptr();
|
|
ebda->fdpt[driveid].precompensation = 0xffff;
|
|
ebda->fdpt[driveid].drive_control_byte = 0xc0 | ((nph > 8) << 3);
|
|
ebda->fdpt[driveid].landing_zone = npc;
|
|
ebda->fdpt[driveid].cylinders = nlc;
|
|
ebda->fdpt[driveid].heads = nlh;
|
|
ebda->fdpt[driveid].sectors = nlspt;
|
|
|
|
if (nlc == npc && nlh == nph && nlspt == npspt)
|
|
// no logical CHS mapping used, just physical CHS
|
|
// use Standard Fixed Disk Parameter Table (FDPT)
|
|
return;
|
|
|
|
// complies with Phoenix style Translated Fixed Disk Parameter
|
|
// Table (FDPT)
|
|
ebda->fdpt[driveid].phys_cylinders = npc;
|
|
ebda->fdpt[driveid].phys_heads = nph;
|
|
ebda->fdpt[driveid].phys_sectors = npspt;
|
|
ebda->fdpt[driveid].a0h_signature = 0xa0;
|
|
|
|
// Checksum structure.
|
|
u8 sum = checksum((u8*)&ebda->fdpt[driveid], sizeof(ebda->fdpt[driveid])-1);
|
|
ebda->fdpt[driveid].checksum = -sum;
|
|
}
|
|
|
|
static u8
|
|
get_translation(int driveid)
|
|
{
|
|
if (! CONFIG_COREBOOT) {
|
|
// Emulators pass in the translation info via nvram.
|
|
u8 channel = driveid / 2;
|
|
u8 translation = inb_cmos(CMOS_BIOS_DISKTRANSFLAG + channel/2);
|
|
translation >>= 2 * (driveid % 4);
|
|
translation &= 0x03;
|
|
return translation;
|
|
}
|
|
|
|
// On COREBOOT, use a heuristic to determine translation type.
|
|
u16 heads = GET_GLOBAL(ATA.devices[driveid].pchs.heads);
|
|
u16 cylinders = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders);
|
|
u16 spt = GET_GLOBAL(ATA.devices[driveid].pchs.spt);
|
|
|
|
if (cylinders <= 1024 && heads <= 16 && spt <= 63)
|
|
return ATA_TRANSLATION_NONE;
|
|
if (cylinders * heads <= 131072)
|
|
return ATA_TRANSLATION_LARGE;
|
|
return ATA_TRANSLATION_LBA;
|
|
}
|
|
|
|
static void
|
|
setup_translation(int driveid)
|
|
{
|
|
u8 translation = get_translation(driveid);
|
|
SET_GLOBAL(ATA.devices[driveid].translation, translation);
|
|
|
|
u8 channel = driveid / 2;
|
|
u8 slave = driveid % 2;
|
|
u16 heads = GET_GLOBAL(ATA.devices[driveid].pchs.heads);
|
|
u16 cylinders = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders);
|
|
u16 spt = GET_GLOBAL(ATA.devices[driveid].pchs.spt);
|
|
u64 sectors = GET_GLOBAL(ATA.devices[driveid].sectors);
|
|
|
|
dprintf(1, "ata%d-%d: PCHS=%u/%d/%d translation="
|
|
, channel, slave, cylinders, heads, spt);
|
|
switch (translation) {
|
|
case ATA_TRANSLATION_NONE:
|
|
dprintf(1, "none");
|
|
break;
|
|
case ATA_TRANSLATION_LBA:
|
|
dprintf(1, "lba");
|
|
spt = 63;
|
|
if (sectors > 63*255*1024) {
|
|
heads = 255;
|
|
cylinders = 1024;
|
|
break;
|
|
}
|
|
u32 sect = (u32)sectors / 63;
|
|
heads = sect / 1024;
|
|
if (heads>128)
|
|
heads = 255;
|
|
else if (heads>64)
|
|
heads = 128;
|
|
else if (heads>32)
|
|
heads = 64;
|
|
else if (heads>16)
|
|
heads = 32;
|
|
else
|
|
heads = 16;
|
|
cylinders = sect / heads;
|
|
break;
|
|
case ATA_TRANSLATION_RECHS:
|
|
dprintf(1, "r-echs");
|
|
// Take care not to overflow
|
|
if (heads==16) {
|
|
if (cylinders>61439)
|
|
cylinders=61439;
|
|
heads=15;
|
|
cylinders = (u16)((u32)(cylinders)*16/15);
|
|
}
|
|
// then go through the large bitshift process
|
|
case ATA_TRANSLATION_LARGE:
|
|
if (translation == ATA_TRANSLATION_LARGE)
|
|
dprintf(1, "large");
|
|
while (cylinders > 1024) {
|
|
cylinders >>= 1;
|
|
heads <<= 1;
|
|
|
|
// If we max out the head count
|
|
if (heads > 127)
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
// clip to 1024 cylinders in lchs
|
|
if (cylinders > 1024)
|
|
cylinders = 1024;
|
|
dprintf(1, " LCHS=%d/%d/%d\n", cylinders, heads, spt);
|
|
|
|
SET_GLOBAL(ATA.devices[driveid].lchs.heads, heads);
|
|
SET_GLOBAL(ATA.devices[driveid].lchs.cylinders, cylinders);
|
|
SET_GLOBAL(ATA.devices[driveid].lchs.spt, spt);
|
|
}
|
|
|
|
static void
|
|
init_drive_ata(int driveid)
|
|
{
|
|
SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_ATA);
|
|
|
|
// Temporary values to do the transfer
|
|
SET_GLOBAL(ATA.devices[driveid].device, ATA_DEVICE_HD);
|
|
SET_GLOBAL(ATA.devices[driveid].mode, ATA_MODE_PIO16);
|
|
|
|
// Now we send a IDENTIFY command to ATA device
|
|
u8 buffer[0x0200];
|
|
memset(buffer, 0, sizeof(buffer));
|
|
struct disk_op_s dop;
|
|
dop.driveid = driveid;
|
|
dop.command = ATA_CMD_IDENTIFY_DEVICE;
|
|
dop.count = 1;
|
|
dop.lba = 1;
|
|
dop.far_buffer = MAKE_FARPTR(GET_SEG(SS), (u32)buffer);
|
|
u16 ret = ata_cmd_data(&dop);
|
|
if (ret)
|
|
BX_PANIC("ata-detect: Failed to detect ATA device\n");
|
|
|
|
u8 removable = (buffer[0] & 0x80) ? 1 : 0;
|
|
u8 mode = buffer[48*2] ? ATA_MODE_PIO32 : ATA_MODE_PIO16;
|
|
u16 blksize = IDE_SECTOR_SIZE;
|
|
|
|
u16 cylinders = *(u16*)&buffer[1*2]; // word 1
|
|
u16 heads = *(u16*)&buffer[3*2]; // word 3
|
|
u16 spt = *(u16*)&buffer[6*2]; // word 6
|
|
|
|
u64 sectors;
|
|
if (*(u16*)&buffer[83*2] & (1 << 10)) // word 83 - lba48 support
|
|
sectors = *(u64*)&buffer[100*2]; // word 100-103
|
|
else
|
|
sectors = *(u32*)&buffer[60*2]; // word 60 and word 61
|
|
|
|
SET_GLOBAL(ATA.devices[driveid].device, ATA_DEVICE_HD);
|
|
SET_GLOBAL(ATA.devices[driveid].removable, removable);
|
|
SET_GLOBAL(ATA.devices[driveid].mode, mode);
|
|
SET_GLOBAL(ATA.devices[driveid].blksize, blksize);
|
|
SET_GLOBAL(ATA.devices[driveid].pchs.heads, heads);
|
|
SET_GLOBAL(ATA.devices[driveid].pchs.cylinders, cylinders);
|
|
SET_GLOBAL(ATA.devices[driveid].pchs.spt, spt);
|
|
SET_GLOBAL(ATA.devices[driveid].sectors, sectors);
|
|
|
|
// Setup disk geometry translation.
|
|
setup_translation(driveid);
|
|
|
|
// fill hdidmap
|
|
u8 hdcount = GET_BDA(hdcount);
|
|
SET_GLOBAL(ATA.idmap[0][hdcount], driveid);
|
|
SET_BDA(hdcount, ++hdcount);
|
|
|
|
// Fill "fdpt" structure.
|
|
fill_fdpt(driveid);
|
|
|
|
// Report drive info to user.
|
|
u64 sizeinmb = GET_GLOBAL(ATA.devices[driveid].sectors) >> 11;
|
|
report_model(driveid, buffer);
|
|
u8 version = get_ata_version(buffer);
|
|
if (sizeinmb < (1 << 16))
|
|
printf(" ATA-%d Hard-Disk (%u MiBytes)\n", version, (u32)sizeinmb);
|
|
else
|
|
printf(" ATA-%d Hard-Disk (%u GiBytes)\n", version
|
|
, (u32)(sizeinmb >> 10));
|
|
}
|
|
|
|
static void
|
|
init_drive_unknown(int driveid)
|
|
{
|
|
SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_UNKNOWN);
|
|
|
|
u8 channel = driveid / 2;
|
|
u8 slave = driveid % 2;
|
|
printf("ata%d %s: Unknown device\n", channel, slave ? " slave" : "master");
|
|
}
|
|
|
|
static void
|
|
ata_detect()
|
|
{
|
|
// Device detection
|
|
int driveid;
|
|
for(driveid=0; driveid<CONFIG_MAX_ATA_DEVICES; driveid++) {
|
|
u8 channel = driveid / 2;
|
|
u8 slave = driveid % 2;
|
|
|
|
u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
|
|
u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
|
|
if (!iobase1)
|
|
break;
|
|
|
|
// Disable interrupts
|
|
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
|
|
|
|
// Look for device
|
|
outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
|
|
mdelay(50);
|
|
outb(0x55, iobase1+ATA_CB_SC);
|
|
outb(0xaa, iobase1+ATA_CB_SN);
|
|
outb(0xaa, iobase1+ATA_CB_SC);
|
|
outb(0x55, iobase1+ATA_CB_SN);
|
|
outb(0x55, iobase1+ATA_CB_SC);
|
|
outb(0xaa, iobase1+ATA_CB_SN);
|
|
|
|
// If we found something
|
|
u8 sc = inb(iobase1+ATA_CB_SC);
|
|
u8 sn = inb(iobase1+ATA_CB_SN);
|
|
dprintf(6, "ata_detect(1) drive=%d sc=%x sn=%x\n", driveid, sc, sn);
|
|
|
|
if (sc != 0x55 || sn != 0xaa)
|
|
continue;
|
|
|
|
// reset the channel
|
|
ata_reset(driveid);
|
|
|
|
// check for ATA or ATAPI
|
|
outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
|
|
mdelay(50);
|
|
sc = inb(iobase1+ATA_CB_SC);
|
|
sn = inb(iobase1+ATA_CB_SN);
|
|
dprintf(6, "ata_detect(2) drive=%d sc=%x sn=%x\n", driveid, sc, sn);
|
|
if (sc!=0x01 || sn!=0x01) {
|
|
init_drive_unknown(driveid);
|
|
continue;
|
|
}
|
|
u8 cl = inb(iobase1+ATA_CB_CL);
|
|
u8 ch = inb(iobase1+ATA_CB_CH);
|
|
u8 st = inb(iobase1+ATA_CB_STAT);
|
|
dprintf(6, "ata_detect(3) drive=%d sc=%x sn=%x cl=%x ch=%x st=%x\n"
|
|
, driveid, sc, sn, cl, ch, st);
|
|
|
|
if (cl==0x14 && ch==0xeb)
|
|
init_drive_atapi(driveid);
|
|
else if (cl==0x00 && ch==0x00 && st!=0x00)
|
|
init_drive_ata(driveid);
|
|
else if (cl==0xff && ch==0xff)
|
|
// None
|
|
continue;
|
|
else
|
|
init_drive_unknown(driveid);
|
|
}
|
|
|
|
printf("\n");
|
|
}
|
|
|
|
static void
|
|
ata_init()
|
|
{
|
|
// hdidmap and cdidmap init.
|
|
u8 device;
|
|
for (device=0; device < CONFIG_MAX_ATA_DEVICES; device++) {
|
|
SET_GLOBAL(ATA.idmap[0][device], CONFIG_MAX_ATA_DEVICES);
|
|
SET_GLOBAL(ATA.idmap[1][device], CONFIG_MAX_ATA_DEVICES);
|
|
}
|
|
|
|
// Scan PCI bus for ATA adapters
|
|
int count=0;
|
|
int bdf, max;
|
|
foreachpci(bdf, max) {
|
|
if (pci_config_readw(bdf, PCI_CLASS_DEVICE) != PCI_CLASS_STORAGE_IDE)
|
|
continue;
|
|
|
|
u8 irq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
|
|
SET_GLOBAL(ATA.channels[count].irq, irq);
|
|
SET_GLOBAL(ATA.channels[count].pci_bdf, bdf);
|
|
|
|
u8 prog_if = pci_config_readb(bdf, PCI_CLASS_PROG);
|
|
u32 port1, port2;
|
|
|
|
if (prog_if & 1) {
|
|
port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_0) & ~3;
|
|
port2 = pci_config_readl(bdf, PCI_BASE_ADDRESS_1) & ~3;
|
|
} else {
|
|
port1 = 0x1f0;
|
|
port2 = 0x3f0;
|
|
}
|
|
SET_GLOBAL(ATA.channels[count].iobase1, port1);
|
|
SET_GLOBAL(ATA.channels[count].iobase2, port2);
|
|
dprintf(1, "ATA controller %d at %x/%x (dev %x prog_if %x)\n"
|
|
, count, port1, port2, bdf, prog_if);
|
|
count++;
|
|
|
|
if (prog_if & 4) {
|
|
port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_2) & ~3;
|
|
port2 = pci_config_readl(bdf, PCI_BASE_ADDRESS_3) & ~3;
|
|
} else {
|
|
port1 = 0x170;
|
|
port2 = 0x370;
|
|
}
|
|
dprintf(1, "ATA controller %d at %x/%x (dev %x prog_if %x)\n"
|
|
, count, port1, port2, bdf, prog_if);
|
|
SET_GLOBAL(ATA.channels[count].iobase1, port1);
|
|
SET_GLOBAL(ATA.channels[count].iobase2, port2);
|
|
count++;
|
|
}
|
|
}
|
|
|
|
void
|
|
hard_drive_setup()
|
|
{
|
|
if (!CONFIG_ATA)
|
|
return;
|
|
|
|
dprintf(3, "init hard drives\n");
|
|
ata_init();
|
|
ata_detect();
|
|
|
|
SET_BDA(disk_control_byte, 0xc0);
|
|
|
|
enable_hwirq(14, entry_76);
|
|
}
|