// -*- fundamental -*-
/////////////////////////////////////////////////////////////////////////
-// $Id: rombios.c,v 1.5 2008/05/12 00:21:17 pdinda Exp $
+// $Id: rombios.c,v 1.12 2008/07/11 22:59:38 pdinda Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
#define DEBUG_ROMBIOS 1
-#define DEBUG_ATA 1
+#define DEBUG_ATA 0
#define DEBUG_INT13_HD 0
#define DEBUG_INT13_CD 0
#define DEBUG_INT13_ET 0
#endif // BX_ELTORITO_BOOT
-static char bios_cvs_version_string[] = "$Revision: 1.5 $";
-static char bios_date_string[] = "$Date: 2008/05/12 00:21:17 $";
+static char bios_cvs_version_string[] = "$Revision: 1.12 $";
+static char bios_date_string[] = "$Date: 2008/07/11 22:59:38 $";
-static char CVSID[] = "$Id: rombios.c,v 1.5 2008/05/12 00:21:17 pdinda Exp $";
+static char CVSID[] = "$Id: rombios.c,v 1.12 2008/07/11 22:59:38 pdinda Exp $";
/* Offset to skip the CVS $Id: prefix */
#define bios_version_string (CVSID + 4)
}
// Bit16u
-//get_DS()
-//{
-//ASM_START
-// mov ax, ds
-//ASM_END
-//}
+get_DS()
+{
+ASM_START
+ mov ax, ds
+ASM_END
+}
+
//
// void
//set_DS(ds_selector)
while ( (inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x00);
/* flush incoming keys */
- max=0x2000;
+ // temporarily chaged for debug -PAD
+ // max=0x2000;
+ max=10;
while (--max > 0) {
- outb(0x80, 0x00);
+ outb(0x80, 0x01);
if (inb(0x64) & 0x01) {
inb(0x60);
max = 0x2000;
/* Wait until buffer is empty */
max=0xffff;
- while ( (inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x00);
+ while ( (inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x02);
if (max==0x0) keyboard_panic(00);
/* Wait for data */
max=0xffff;
- while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x01);
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x03);
if (max==0x0) keyboard_panic(01);
/* read self-test result, 0x55 should be returned from 0x60 */
Bit16u iobase1, iobase2;
Bit16u lcount, lbefore, lafter, count;
Bit8u channel, slave;
- Bit8u status, mode, lmode;
+ Bit8u status, error, mode, lmode;
Bit32u total, transfer;
channel = device / 2;
write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
- // Device should not be busy yet
+#define STATUS_WAIT_FOR(x) do { status=inb(iobase1+ATA_CB_STAT); } while (!(x))
+#define ALT_STATUS_WAIT_FOR(x) do { status=inb(iobase2+ATA_CB_ASTAT); } while (!(x))
+#define ERROR_UPDATE() do { error=inb(iobase1+ATA_CB_ERR); } while (0)
+#define STATUS_UPDATE() do { status=inb(iobase1+ATA_CB_STAT); } while (0)
+#define ALT_STATUS_UPDATE() do { status=inb(iobase1+ATA_CB_STAT); } while (0)
+#define WAIT_FOR_NOT_BUSY() STATUS_WAIT_FOR((status&ATA_CB_STAT_BSY)==0)
+#define WAIT_FOR_DATA_REQUEST() STATUS_WAIT_FOR((status&ATA_CB_STAT_DRQ))
+#define WAIT_FOR_DRIVE_READY() STATUS_WAIT_FOR((status&ATA_CB_STAT_RDY))
+#define WAIT_FOR_NOT_BUSY_AND_DRIVE_READY() STATUS_WAIT_FOR(((status&ATA_CB_STAT_BSY)==0)&&((status&ATA_CB_STAT_RDY)))
+#define WAIT_FOR_NOT_BUSY_AND_DATA_REQUEST() STATUS_WAIT_FOR((status&ATA_CB_STAT_BSY)==0)&&((status&ATA_CB_STAT_DRQ)))
-#define PDINDA 1
-#if PDINDA
- // wait for device to be ready
- do {
- status = inb(iobase1 + ATA_CB_STAT);
- // BX_DEBUG_ATA("ata_cmd_packet: wait (%2x)\n",status);
- } while (status & ATA_CB_STAT_BSY);
-#else
- status = inb(iobase1 + ATA_CB_STAT);
- if (status & ATA_CB_STAT_BSY) return 2;
-#endif
+retry_on_media_change:
- // set "noninterruptable"
- outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+ WAIT_FOR_NOT_BUSY();
+
+ //BX_DEBUG_ATA("ata_cmd_packet: not busy done\n");
+
+ // We have already selected the appropriate controller (iobase1,2)
+ // select master or slave
+ outb(iobase1 + ATA_CB_DH, slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0);
+
+ STATUS_UPDATE();
+
+ //BX_DEBUG_ATA("ata_cmd_packet: drive selected (%d) status=0x%x\n", slave,(unsigned)status);
- //outb(iobase1 + ATA_CB_FR, 0x00);
- //outb(iobase1 + ATA_CB_SC, 0x00);
- //outb(iobase1 + ATA_CB_SN, 0x00);
- // Set cylinders ?? - Why? And why not sector
- // This is all embedded in cmd_packet, anyway...
+ // Technically, we should be calling this here
+ // but QEMU's device model appears to be broken and RDY never is assserted
+ // on a drive change
+ // WAIT_FOR_NOT_BUSY_AND_DRIVE_READY();
+ WAIT_FOR_NOT_BUSY();
+
+ //BX_DEBUG_ATA("ata_cmd_packet: not busy\n");
+
+ // set "noninterruptable"
+ outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+ // no DMA
+ outb(iobase1 + ATA_CB_FR, 0x00);
+ // This conveys the maximum bytecount. count&0xff in low, count>>8 in high
+ // it is not actually doing anything with cylinders
outb(iobase1 + ATA_CB_CL, 0xfff0 & 0x00ff);
outb(iobase1 + ATA_CB_CH, 0xfff0 >> 8);
+ // Not sure about these
+ outb(iobase1 + ATA_CB_SC, 0x00);
+ outb(iobase1 + ATA_CB_SN, 0x00);
- // select master or slave
- outb(iobase1 + ATA_CB_DH, slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0);
+ //BX_DEBUG_ATA("ata_cmd_packet: configuration done\n");
- // Tell it we are sending a command packet
+ // Issue command for packet
outb(iobase1 + ATA_CB_CMD, ATA_CMD_PACKET);
-#if 0
- // Now wait for 400 ns
- {
- int i;
- for (i=0;i<0xffff; i++)
- ;
- }
-#endif
+ //BX_DEBUG_ATA("ata_cmd_packet: A0 issued to drive\n");
+
+ ALT_STATUS_WAIT_FOR((status&ATA_CB_STAT_BSY)==0);
- // Device should ok to receive command
- // wait until we get
- while (1) {
+ //BX_DEBUG_ATA("ata_cmd_packet: alt status shows not busy\n");
- status = inb(iobase1 + ATA_CB_STAT);
+ STATUS_UPDATE();
-#if PDINDA
- if (!(status & ATA_CB_STAT_BSY)) break;
-#else
- // Shouldn't this be ATA_CB_STAT_RDY? -PAD - NO, it's OK
- if ( !(status & ATA_CB_STAT_BSY) ) break;
-#endif
+ //BX_DEBUG_ATA("ata_cmd_packet: main status shows 0x%x\n",(unsigned)status);
- }
+ WAIT_FOR_DATA_REQUEST();
- if (status & ATA_CB_STAT_ERR) {
- BX_DEBUG_ATA("ata_cmd_packet : error, status is %02x\n",status);
- return 3;
- } else if ( !(status & ATA_CB_STAT_DRQ) ) {
- BX_DEBUG_ATA("ata_cmd_packet : DRQ not set (status %02x)\n", (unsigned) status);
- return 4;
- }
+ //BX_DEBUG_ATA("ata_cmd_packet: data request is set\n");
// Normalize address
cmdseg += (cmdoff / 16);
pop bp
ASM_END
- // issue read of alternative status - claimed to be in spec
- //inb(iobase2+ATA_CB_ASTAT);
+
+ ALT_STATUS_WAIT_FOR((status&ATA_CB_STAT_BSY)==0);
+
+ STATUS_UPDATE();
+ ERROR_UPDATE();
+
+ BX_DEBUG_ATA("ata_cmd_packet: after packet: 0x%x error 0x%x\n",(unsigned)status,(unsigned)error);
+
+ if (status&ATA_CB_STAT_ERR && error&ATA_CB_ER_MC) {
+ BX_DEBUG_ATA("ata_cmd_packet: caught unexpected media change. Retrying\n");
+ goto retry_on_media_change;
+ }
+
if (inout == ATA_DATA_NO) {
- status = inb(iobase1 + ATA_CB_STAT);
+ STATUS_UPDATE();
}
else {
- // Wait for completion
- // PDINDA
- do {
- status=inb(iobase1+ATA_CB_STAT);
- BX_DEBUG_ATA("ata_cmd_packet: wait (%2x)\n",status);
- } while ((status & ATA_CB_STAT_BSY));
while (1) {
+
+ // This while loop is quite bizarre
+ // Under both success and failure, you'll go through it once
+ // and then just a wee bit the second time - PAD
+
- status = inb(iobase1 + ATA_CB_STAT);
+ ALT_STATUS_WAIT_FOR((status&ATA_CB_STAT_BSY)==0);
+ STATUS_UPDATE();
+ ERROR_UPDATE();
+
+ BX_DEBUG_ATA("ata_cmd_packet/dataxferloop: status=0x%x, error=0x%x\n",(unsigned)status,(unsigned)error);
+
+
+
+#if 0
+//
+// According to specatapi, the following is how you're supposed
+// To tell when there is no more data for you
+// But it doesn't work on at least some hardware - PAD
+ if ((status&ATA_CB_STAT_BSY) && !(status&ATA_CB_STAT_DRQ)) {
+ // done with data tranfer
+ // we wait for it to flip
+ ALT_STATUS_WAIT_FOR((status&ATA_CB_STAT_BSY)==0);
+ // then read one more time
+ STATUS_UPDATE();
+ // then we are done
+ break;
+ }
+
+#else
+
// Check if command completed
if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_DRQ) ) ==0 ) break;
-
+
+#endif
if (status & ATA_CB_STAT_ERR) {
BX_DEBUG_ATA("ata_cmd_packet : error (status %02x)\n",status);
return 3;
if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
!= ATA_CB_STAT_RDY ) {
BX_DEBUG_ATA("ata_cmd_packet 2 : not ready (status %02x)\n", (unsigned) status);
- return 4;
+ return 4;
}
// Enable interrupts
outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15);
return 0;
+
}
// ---------------------------------------------------------------------------
// if not found
if(device >= BX_MAX_ATA_DEVICES) return 2;
+
+
// Read the Boot Record Volume Descriptor
memsetb(get_SS(),atacmd,0,12);
atacmd[0]=0x28; // READ command
+ atacmd[1]=0x0 ; // reserved - not sure why this wasn't zeroed to begin with -PAD
+ atacmd[6]=0x0 ; // reserved - ... -PAD
atacmd[7]=(0x01 & 0xff00) >> 8; // Sectors
atacmd[8]=(0x01 & 0x00ff); // Sectors
atacmd[2]=(0x11 & 0xff000000) >> 24; // LBA
atacmd[3]=(0x11 & 0x00ff0000) >> 16;
atacmd[4]=(0x11 & 0x0000ff00) >> 8;
atacmd[5]=(0x11 & 0x000000ff);
+ atacmd[9]=atacmd[10]=atacmd[11]=0x0; // just to be safe -PAD
if((error = ata_cmd_packet(device, 12, get_SS(), atacmd, 0, 2048L, ATA_DATA_IN, get_SS(), buffer)) != 0)
return 3;
case 0x20: // coded by osmaker aka K.J.
if(regs.u.r32.edx == 0x534D4150) /* SMAP */
{
-#ifdef HVMASSIST
+#if defined(HVMASSIST) && 0
if ((regs.u.r16.bx / 0x14) * 0x14 == regs.u.r16.bx) {
+
Bit16u e820_table_size = read_word(0xe000, 0x8) * 0x14;
+ BX_DEBUG_INT15("OK bx=%x\n",regs.u.r16.bx);
+
if (regs.u.r16.bx + 0x14 <= e820_table_size) {
memcpyb(ES, regs.u.r16.di,
0xe000, 0x10 + regs.u.r16.bx, 0x14);
Bit8u drive_type, num_floppies, ah;
Bit16u es, last_addr;
- printf("In int13_diskette\n");
- BX_DEBUG_INT13_FL("int13_diskette: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
- // BX_DEBUG_INT13_FL("int13_diskette: SS=%04x DS=%04x ES=%04x DI=%04x SI=%04x\n",get_SS(), get_DS(), ES, DI, SI);
+ //printf("int13_diskette: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
+ BX_DEBUG_INT13_FL("int13_diskette: SS=%04x DS=%04x ES=%04x DI=%04x SI=%04x\n",get_SS(),get_DS(), ES, DI, SI);
ah = GET_AH();
switch ( ah ) {
case 0x00: // diskette controller reset
-BX_DEBUG_INT13_FL("floppy f00\n");
+ BX_DEBUG_INT13_FL("floppy f00\n");
drive = GET_ELDL();
if (drive > 1) {
SET_AH(1); // invalid param
print_boot_device(0, bootdrv);
#endif // BX_ELTORITO_BOOT
+ BX_DEBUG("boot to %x\n", (((Bit32u)bootdrv) << 16) + bootseg);
+
// return the boot segment
return (((Bit32u)bootdrv) << 16) + bootseg;
}
mov [bp], ax ;; set bp to zero
mov ax, #0xaa55 ;; set ok flag
+
pop bp
+
iret ;; Beam me up Scotty
;----------
mov ds, ax
mov 0x008E, #0xff
call eoi_both_pics
- pop ds
+ pop ds
pop ax
iret
jne rom_scan_increment
call rom_checksum
jnz rom_scan_increment
+
mov al, [2] ;; change increment to ROM length in 512-byte blocks
;; We want our increment in 512-byte quantities, rounded to
