612 lines
15 KiB
HolyC
Executable File
612 lines
15 KiB
HolyC
Executable File
U0 ATABlkSel(CBlkDev *bd,I64 blk,I64 cnt)
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{
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if (bd->type!=BDT_ATAPI && bd->base1)
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OutU8(bd->base1+ATAR1_CTRL,0x8);
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if (bd->flags & BDF_EXT_SIZE) { //48 Bit LBA?
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OutU8(bd->base0+ATAR0_NSECT,cnt.u8[1]);
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OutU8(bd->base0+ATAR0_SECT,blk.u8[3]);
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OutU8(bd->base0+ATAR0_LCYL,blk.u8[4]);
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OutU8(bd->base0+ATAR0_HCYL,blk.u8[5]);
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OutU8(bd->base0+ATAR0_NSECT,cnt);
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OutU8(bd->base0+ATAR0_SECT,blk);
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OutU8(bd->base0+ATAR0_LCYL,blk.u8[1]);
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OutU8(bd->base0+ATAR0_HCYL,blk.u8[2]);
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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} else { //28 Bit LBA
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OutU8(bd->base0+ATAR0_NSECT,cnt);
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OutU8(bd->base0+ATAR0_SECT,blk);
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OutU8(bd->base0+ATAR0_LCYL,blk.u8[1]);
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OutU8(bd->base0+ATAR0_HCYL,blk.u8[2]);
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4|blk.u8[3]);
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}
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}
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Bool ATAWaitNotBUSY(CBlkDev *bd,F64 timeout)
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{
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I64 i;
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do {
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for (i=0;i<3;i++)
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if (!(InU8(bd->base0+ATAR0_STAT)&ATAS_BSY))
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return TRUE;
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Yield;
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} while (!(0<timeout<tS));
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return FALSE;
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}
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Bool ATAWaitDRQ(CBlkDev *bd,F64 timeout)
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{
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I64 i;
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do {
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for (i=0;i<3;i++)
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if (InU8(bd->base0+ATAR0_STAT)&ATAS_DRQ)
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return TRUE;
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Yield;
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} while (!(0<timeout<tS));
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return FALSE;
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}
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Bool ATANop(CBlkDev *bd,F64 timeout)
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{
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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OutU8(bd->base0+ATAR0_FEAT,0);
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OutU8(bd->base0+ATAR0_CMD,ATA_NOP);
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return ATAWaitNotBUSY(bd,timeout);
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}
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U0 ATACmd(CBlkDev *bd,U8 cmd)
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{
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OutU8(bd->base0+ATAR0_FEAT,0);
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OutU8(bd->base0+ATAR0_CMD,cmd);
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bd->last_time=tS;
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PortNop;
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}
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Bool ATAGetRes(CBlkDev *bd,F64 timeout,U8 *buf,I64 cnt,
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I64 _avail,Bool one_read)
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{
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I64 avail,overflow;
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bd->flags&=~BDF_LAST_WAS_WRITE;
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MemSet(buf,0,cnt);
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while (cnt>0) {
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if (!ATAWaitDRQ(bd,timeout))
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return FALSE;
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if (_avail)
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avail=_avail;
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else
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avail=InU8(bd->base0+ATAR0_HCYL)<<8+InU8(bd->base0+ATAR0_LCYL);
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if (avail) {
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if (avail>cnt) {
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overflow=avail-cnt;
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avail=cnt;
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} else
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overflow=0;
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if (avail&2)
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RepInU16(buf,avail>>1,bd->base0+ATAR0_DATA);
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else
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RepInU32(buf,avail>>2,bd->base0+ATAR0_DATA);
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cnt-=avail;
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buf+=avail;
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while (overflow>0) {
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InU16(bd->base0+ATAR0_DATA);
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overflow-=2;
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if (0<timeout<tS)
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return FALSE;
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}
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if (one_read)
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break;
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} else
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Yield;
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}
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return ATAWaitNotBUSY(bd,timeout);
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}
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Bool ATAPIWritePktWord(CBlkDev *bd,F64 timeout,...)
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{
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I64 i;
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for (i=0;i<argc;i++) {
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if (!ATAWaitDRQ(bd,timeout))
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return FALSE;
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OutU16(bd->base0+ATAR0_DATA,EndianU16(argv[i]));
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bd->last_time=tS;
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}
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return TRUE;
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}
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Bool ATAPISetMaxSpeed(CBlkDev *bd)
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{
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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OutU8(bd->base0+ATAR0_LCYL,0);
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OutU8(bd->base0+ATAR0_HCYL,0);
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ATACmd(bd,ATA_PACKET);
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ATAPIWritePktWord(bd,0,0xBB00,0xFFFF,0xFFFF,0,0,0);
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return ATAWaitNotBUSY(bd,0);
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}
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Bool ATAPISeek(CBlkDev *bd,I64 native_blk)
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{
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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OutU8(bd->base0+ATAR0_LCYL,0);
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OutU8(bd->base0+ATAR0_HCYL,0);
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ATACmd(bd,ATA_PACKET);
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ATAPIWritePktWord(bd,0,0x2B00,native_blk>>16,native_blk,0,0,0);
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return ATAWaitNotBUSY(bd,0);
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}
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Bool ATAPIStartStop(CBlkDev *bd,F64 timeout,Bool start)
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{
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I64 i;
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if (start)
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i=0x100;
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else
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i=0;
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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ATACmd(bd,ATA_PACKET);
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//Start/Stop
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if (ATAPIWritePktWord(bd,timeout,0x1B00,0,i,0,0,0))
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return ATAWaitNotBUSY(bd,timeout);
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else
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return FALSE;
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}
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I64 ATAGetDevId(CBlkDev *bd,F64 timeout,Bool keep_id_record)
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{
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I64 res=BDT_NULL;
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U16 *id_record=NULL;
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if (bd->type!=BDT_ATAPI && bd->base1)
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OutU8(bd->base1+ATAR1_CTRL,0x8);
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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ATACmd(bd,ATA_ID_DEV);
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if (ATAWaitNotBUSY(bd,timeout)) {
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if (InU8(bd->base0+ATAR0_STAT)&ATAS_ERR)
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res=BDT_ATAPI;
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else {
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id_record=ACAlloc(512);
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if (ATAGetRes(bd,timeout,id_record,512,512,FALSE))
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res=BDT_ATA;
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else {
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Free(id_record);
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id_record=NULL;
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}
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}
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}
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if (keep_id_record) {
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Free(bd->dev_id_record);
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bd->dev_id_record=id_record;
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}
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return res;
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}
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I64 ATAReadNativeMax(CBlkDev *bd,F64 timeout)
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{//Returns zero on err
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I64 res=0;
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Bool okay=TRUE;
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if (bd->type==BDT_ATAPI) {
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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ATACmd(bd,ATA_DEV_RST);
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if (!ATAWaitNotBUSY(bd,0))
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okay=FALSE;
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} else {
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while (InU8(bd->base0+ATAR0_STAT) & ATAS_BSY) {
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if (bd->flags&BDF_LAST_WAS_WRITE)
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OutU16(bd->base0+ATAR0_DATA,0);
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else
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InU16(bd->base0+ATAR0_DATA);
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Yield;
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if (0<timeout<tS)
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return FALSE;
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}
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if (ATAGetDevId(bd,timeout,TRUE)==BDT_NULL)
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okay=FALSE;
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else
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BEqu(&bd->flags,BDf_EXT_SIZE,Bt(&bd->dev_id_record[86],10));
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}
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if (okay) {
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if (bd->flags & BDF_EXT_SIZE && bd->base1) {
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OutU8(bd->base1+ATAR1_CTRL,0x8);
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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ATACmd(bd,ATA_READ_NATIVE_MAX_EXT);
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if (ATAWaitNotBUSY(bd,timeout)) {
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res.u8[0]=InU8(bd->base0+ATAR0_SECT);
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res.u8[1]=InU8(bd->base0+ATAR0_LCYL);
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res.u8[2]=InU8(bd->base0+ATAR0_HCYL);
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OutU8(bd->base1+ATAR1_CTRL,0x80);
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res.u8[3]=InU8(bd->base0+ATAR0_SECT);
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res.u8[4]=InU8(bd->base0+ATAR0_LCYL);
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res.u8[5]=InU8(bd->base0+ATAR0_HCYL);
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if (res>>24==res&0xFFFFFF) {//Kludge to make QEMU work
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bd->flags&=~BDF_EXT_SIZE;
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res&=0xFFFFFF;
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}
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}
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} else {
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if (bd->type!=BDT_ATAPI && bd->base1)
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OutU8(bd->base1+ATAR1_CTRL,0x8);
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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ATACmd(bd,ATA_READ_NATIVE_MAX);
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if (ATAWaitNotBUSY(bd,timeout)) {
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res.u8[0]=InU8(bd->base0+ATAR0_SECT);
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res.u8[1]=InU8(bd->base0+ATAR0_LCYL);
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res.u8[2]=InU8(bd->base0+ATAR0_HCYL);
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res.u8[3]=InU8(bd->base0+ATAR0_SEL) & 0xF;
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}
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}
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}
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return bd->max_blk=res;
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}
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I64 ATAPIReadCapacity(CBlkDev *bd,I64 *_blk_size=NULL)
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{//Supposedly this can return a res +/- 75 sects.
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//Error might just be for music.
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Bool unlock=BlkDevLock(bd);
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U32 buf[2];
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if (ATAWaitNotBUSY(bd,0)) {
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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OutU8(bd->base0+ATAR0_LCYL,8);
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OutU8(bd->base0+ATAR0_HCYL,0);
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ATACmd(bd,ATA_PACKET);
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ATAPIWritePktWord(bd,0,0x2500,0,0,0,0,0);
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if (!ATAGetRes(bd,0,buf,8,0,TRUE))
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buf[0]=buf[1]=0;
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} else
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buf[0]=buf[1]=0;
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if (unlock) BlkDevUnlock(bd);
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if (_blk_size) *_blk_size=EndianU32(buf[1]);
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return EndianU32(buf[0]);
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}
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CATAPITrack *ATAPIReadTrackInfo(CBlkDev *bd,I64 blk)
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{
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CATAPITrack *res=CAlloc(sizeof(CATAPITrack));
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Bool unlock=BlkDevLock(bd);
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if (ATAWaitNotBUSY(bd,0)) {
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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OutU8(bd->base0+ATAR0_LCYL,sizeof(CATAPITrack)&0xFF);
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OutU8(bd->base0+ATAR0_HCYL,sizeof(CATAPITrack)>>8);
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ATACmd(bd,ATA_PACKET);
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ATAPIWritePktWord(bd,0,0x5200,blk.u16[1],blk.u16[0],
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(sizeof(CATAPITrack)&0xFF00)>>8,(sizeof(CATAPITrack)&0x00FF)<<8,0);
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if (!ATAGetRes(bd,0,res,sizeof(CATAPITrack),0,TRUE)) {
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Free(res);
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res=NULL;
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}
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} else {
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Free(res);
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res=NULL;
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}
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if (unlock) BlkDevUnlock(bd);
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return res;
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}
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Bool ATAInit(CBlkDev *bd)
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{
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Bool unlock=BlkDevLock(bd),okay=FALSE;
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if (bd->type==BDT_ATAPI)
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bd->flags&=~BDF_EXT_SIZE;
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else
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bd->flags|=BDF_EXT_SIZE;
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if (ATAReadNativeMax(bd,tS+0.1)) {
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ATABlkSel(bd,bd->max_blk,0);
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if (bd->flags&BDF_EXT_SIZE)
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ATACmd(bd,ATA_SET_MAX_EXT);
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else
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ATACmd(bd,ATA_SET_MAX);
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if (ATAWaitNotBUSY(bd,0)) {
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okay=TRUE;
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if (bd->type==BDT_ATAPI) {
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if (ATAPIStartStop(bd,0,TRUE)) {
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if(!ATAPISetMaxSpeed(bd))
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okay=FALSE;
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} else
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okay=FALSE;
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}
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}
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}
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if (unlock) BlkDevUnlock(bd);
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return okay;
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}
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Bool ATAPIWaitReady(CBlkDev *bd,F64 timeout)
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{
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do {
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if (!ATAWaitNotBUSY(bd,timeout) ||
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!ATANop(bd,timeout) ||
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!ATAPIStartStop(bd,timeout,TRUE))
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return FALSE;
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if (InU8(bd->base0+ATAR0_STAT) & ATAS_DRDY &&
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!InU8(bd->base0+ATAR0_FEAT));
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return TRUE;
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ATAInit(bd);
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Yield;
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} while (!(0<timeout<tS));
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return FALSE;
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}
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U0 ATAReadBlks(CBlkDev *bd,U8 *buf, I64 blk, I64 cnt)
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{
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I64 retries=3;
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Bool unlock=BlkDevLock(bd);
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retry:
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ATABlkSel(bd,blk,cnt);
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if (bd->flags & BDF_EXT_SIZE)
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ATACmd(bd,ATA_READ_MULTI_EXT);
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else
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ATACmd(bd,ATA_READ_MULTI);
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if (!ATAGetRes(bd,tS+1.0,buf,cnt*bd->blk_size,BLK_SIZE,FALSE)) {
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if (retries--) {
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ATAWaitNotBUSY(bd,0);
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goto retry;
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} else
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throw('BlkDev');
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}
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blkdev.read_cnt+=(cnt*bd->blk_size)>>BLK_SIZE_BITS;
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if (unlock) BlkDevUnlock(bd);
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}
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I64 ATAProbe(I64 base0,I64 base1,I64 unit)
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{
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CBlkDev bd;
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MemSet(&bd,0,sizeof(CBlkDev));
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bd.type=BDT_ATAPI;
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bd.base0=base0;
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bd.base1=base1;
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bd.unit=unit;
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bd.blk_size=DVD_BLK_SIZE;
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return ATAGetDevId(&bd,tS+0.1,FALSE);
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}
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Bool ATAPIReadBlks2(CBlkDev *bd,F64 timeout,U8 *buf,
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I64 native_blk, I64 cnt,Bool lock)
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{
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Bool res=FALSE,unlock;
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if (cnt<=0)
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return FALSE;
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if (lock)
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unlock=BlkDevLock(bd);
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if (ATAPIWaitReady(bd,timeout)) {
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if (bd->flags & BDF_EXT_SIZE)
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OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
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else
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OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
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OutU8(bd->base0+ATAR0_LCYL,bd->blk_size);
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OutU8(bd->base0+ATAR0_HCYL,bd->blk_size.u8[1]);
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ATACmd(bd,ATA_PACKET);
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if (ATAPIWritePktWord(bd,timeout,0xA800,
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native_blk.u16[1],native_blk,cnt.u16[1],cnt,0) &&
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ATAGetRes(bd,timeout,buf,cnt*bd->blk_size,0,FALSE)) {
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blkdev.read_cnt+=(cnt*bd->blk_size)>>BLK_SIZE_BITS;
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res=TRUE;
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}
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}
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// ATAPIStartStop(bd,0,FALSE);
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if (lock && unlock) BlkDevUnlock(bd);
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return res;
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}
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U0 ATAPIReadBlks(CBlkDev *bd,U8 *buf, I64 blk, I64 cnt)
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{
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CDrv *dv=Let2Drv(bd->first_drv_let);
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I64 retry,spc=bd->blk_size>>BLK_SIZE_BITS,n,blk2,
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l2=bd->max_reads<<1+spc<<1;
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U8 *dvd_buf=MAlloc(l2<<BLK_SIZE_BITS);
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if (cnt>0) {
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if (blk<=bd->max_reads)
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blk2=0;
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else
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blk2=FloorU64(blk-bd->max_reads,spc);
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if (blk2+l2>dv->size+dv->drv_offset)
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l2=dv->size+dv->drv_offset-blk2;
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n=(l2+spc-1)/spc;
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retry=4;
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while (--retry)
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if (ATAPIReadBlks2(bd,tS+7.0+0.004*n,dvd_buf,blk2/spc,n,TRUE))
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//n is 0x800 if max_reads. Up to 8 additional seconds
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break;
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if (!retry)
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ATAPIReadBlks2(bd,0,dvd_buf,blk2/spc,n,TRUE);
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if (bd->flags & BDF_READ_CACHE)
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DskCacheAdd(dv,dvd_buf,blk2,n*spc);
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|
MemCpy(buf,dvd_buf+(blk-blk2)<<BLK_SIZE_BITS,cnt<<BLK_SIZE_BITS);
|
|
}
|
|
Free(dvd_buf);
|
|
}
|
|
|
|
Bool ATARBlks(CDrv *dv,U8 *buf, I64 blk, I64 cnt)
|
|
{
|
|
I64 n;
|
|
CBlkDev *bd=dv->bd;
|
|
while (cnt>0) {
|
|
n=cnt;
|
|
if (n>bd->max_reads)
|
|
n=bd->max_reads;
|
|
if (bd->type==BDT_ATAPI)
|
|
ATAPIReadBlks(bd,buf,blk,n);
|
|
else
|
|
ATAReadBlks(bd,buf,blk,n);
|
|
buf+=n<<BLK_SIZE_BITS;
|
|
blk+=n;
|
|
cnt-=n;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
U0 ATAWriteBlks(CBlkDev *bd,U8 *buf, I64 blk, I64 cnt)
|
|
{//For low level disk access.
|
|
//Use BlkWrite() instead.
|
|
I64 i,U32s_avail,sects_avail,retries=3;
|
|
F64 timeout;
|
|
Bool unlock=BlkDevLock(bd);
|
|
retry:
|
|
ATABlkSel(bd,blk,cnt);
|
|
if (bd->flags&BDF_EXT_SIZE)
|
|
ATACmd(bd,ATA_WRITE_MULTI_EXT);
|
|
else
|
|
ATACmd(bd,ATA_WRITE_MULTI);
|
|
bd->flags|=BDF_LAST_WAS_WRITE;
|
|
while (cnt>0) {
|
|
timeout=tS+1.0;
|
|
while (TRUE) {
|
|
i=InU8(bd->base0+ATAR0_STAT);
|
|
if (!(i & ATAS_DRDY)||!(i & ATAS_DRQ)) {
|
|
Yield;
|
|
} else
|
|
break;
|
|
if (/* i&ATAS_ERR||*/ tS>timeout) {
|
|
if (retries--) {
|
|
ATAWaitNotBUSY(bd,0);
|
|
goto retry;
|
|
} else
|
|
throw('BlkDev');
|
|
}
|
|
}
|
|
sects_avail=1;
|
|
U32s_avail=sects_avail<<BLK_SIZE_BITS>>2;
|
|
RepOutU32(buf,U32s_avail,bd->base0+ATAR0_DATA);
|
|
buf+=U32s_avail<<2;
|
|
cnt-=sects_avail;
|
|
retries=3;
|
|
}
|
|
ATAWaitNotBUSY(bd,0);
|
|
if (unlock) BlkDevUnlock(bd);
|
|
}
|
|
|
|
Bool ATAPISync(CBlkDev *bd)
|
|
{
|
|
Bool okay=TRUE;
|
|
if (!ATAWaitNotBUSY(bd,0))
|
|
okay=FALSE;
|
|
else {
|
|
if (bd->flags & BDF_EXT_SIZE)
|
|
OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
|
|
else
|
|
OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
|
|
OutU8(bd->base0+ATAR0_LCYL,0);
|
|
OutU8(bd->base0+ATAR0_HCYL,0);
|
|
ATACmd(bd,ATA_PACKET);
|
|
ATAPIWritePktWord(bd,0,0x3500,0,0,0,0,0);
|
|
if (!ATAWaitNotBUSY(bd,0))
|
|
okay=FALSE;
|
|
}
|
|
return okay;
|
|
}
|
|
|
|
U0 ATAPIClose(CBlkDev *bd,I64 close_field=0x200,I64 track=0)
|
|
{//0x200 CD/DVD part 1
|
|
// 0x300 DVD part 2
|
|
if (bd->flags & BDF_EXT_SIZE)
|
|
OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
|
|
else
|
|
OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
|
|
OutU8(bd->base0+ATAR0_LCYL,0);
|
|
OutU8(bd->base0+ATAR0_HCYL,0);
|
|
ATACmd(bd,ATA_PACKET);
|
|
ATAPIWritePktWord(bd,0,0x5B00,close_field,track,0,0,0);
|
|
ATAWaitNotBUSY(bd,0);
|
|
}
|
|
|
|
U0 ATAPIWriteBlks(CBlkDev *bd,U8 *buf, I64 native_blk, I64 cnt)
|
|
{
|
|
I64 U32s_avail;
|
|
U8 *buf2;
|
|
ATAWaitNotBUSY(bd,0);
|
|
ATAPISeek(bd,native_blk);
|
|
|
|
OutU8(bd->base0+ATAR0_FEAT,0);
|
|
OutU8(bd->base0+ATAR0_LCYL,bd->blk_size);
|
|
OutU8(bd->base0+ATAR0_HCYL,bd->blk_size.u8[1]);
|
|
if (bd->flags & BDF_EXT_SIZE)
|
|
OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
|
|
else
|
|
OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
|
|
OutU8(bd->base0+ATAR0_CMD,ATA_PACKET);
|
|
ATAPIWritePktWord(bd,0,0x0400,native_blk.u16[1],native_blk,cnt.u16[1],cnt,0);
|
|
bd->flags|=BDF_LAST_WAS_WRITE;
|
|
ATAWaitNotBUSY(bd,0);
|
|
|
|
ATAPISeek(bd,native_blk);
|
|
|
|
if (bd->flags & BDF_EXT_SIZE)
|
|
OutU8(bd->base0+ATAR0_SEL,0xEF|bd->unit<<4);
|
|
else
|
|
OutU8(bd->base0+ATAR0_SEL,0xE0|bd->unit<<4);
|
|
OutU8(bd->base0+ATAR0_LCYL,bd->blk_size);
|
|
OutU8(bd->base0+ATAR0_HCYL,bd->blk_size.u8[1]);
|
|
ATACmd(bd,ATA_PACKET);
|
|
ATAPIWritePktWord(bd,0,0xAA00,native_blk.u16[1],native_blk,cnt.u16[1],cnt,0);
|
|
buf2=buf+bd->blk_size*cnt;
|
|
while (buf<buf2) {
|
|
ATAWaitDRQ(bd,0);
|
|
U32s_avail=(InU8(bd->base0+ATAR0_HCYL)<<8+InU8(bd->base0+ATAR0_LCYL))>>2;
|
|
if (buf+U32s_avail<<2>buf2)
|
|
U32s_avail=(buf2-buf)>>2;
|
|
if (U32s_avail) {
|
|
RepOutU32(buf,U32s_avail,bd->base0+ATAR0_DATA);
|
|
buf+=U32s_avail<<2;
|
|
blkdev.write_cnt+=U32s_avail>>(BLK_SIZE_BITS-2);
|
|
}
|
|
}
|
|
ATAWaitNotBUSY(bd,0);
|
|
}
|
|
|
|
Bool ATAWBlks(CDrv *dv,U8 *buf, I64 blk, I64 cnt)
|
|
{
|
|
I64 n,spc;
|
|
CBlkDev *bd=dv->bd;
|
|
Bool unlock;
|
|
spc=bd->blk_size>>BLK_SIZE_BITS;
|
|
if (bd->type==BDT_ATAPI) {
|
|
unlock=BlkDevLock(bd);
|
|
ATAPIWaitReady(bd,0);
|
|
}
|
|
while (cnt>0) {
|
|
n=cnt;
|
|
if (n>bd->max_writes)
|
|
n=bd->max_writes;
|
|
if (bd->type==BDT_ATAPI)
|
|
ATAPIWriteBlks(bd,buf,blk/spc,(n+spc-1)/spc);
|
|
else
|
|
ATAWriteBlks(bd,buf,blk,n);
|
|
buf+=n<<BLK_SIZE_BITS;
|
|
blk+=n;
|
|
cnt-=n;
|
|
blkdev.write_cnt+=n;
|
|
}
|
|
if (bd->type==BDT_ATAPI) {
|
|
ATAPISync(bd);
|
|
// ATAPIStartStop(bd,0,FALSE);
|
|
if (unlock) BlkDevUnlock(bd);
|
|
}
|
|
return TRUE;
|
|
}
|