GLOBAL VOID
AAA()
{
if ( (GET_AL() & 0xf) > 9 || GET_AF() )
{
SET_AX(GET_AX() + 6);
SET_AH(GET_AH() + 1);
SET_CF(1);
SET_AF(1);
}
else
{
SET_CF(0);
SET_AF(0);
}
SET_AL(GET_AL() & 0xf);
/* Set undefined flag(s) */
#ifdef SET_UNDEFINED_FLAG
SET_OF(UNDEFINED_FLAG);
SET_SF(UNDEFINED_FLAG);
SET_ZF(UNDEFINED_FLAG);
SET_PF(UNDEFINED_FLAG);
#endif
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
GLOBAL VOID
RCL
IFN3(
IU32 *, pop1, /* pntr to dst/src operand */
IU32, op2, /* rotation count operand */
IUM8, op_sz /* 8, 16 or 32-bit */
)
{
IU32 result;
IU32 feedback; /* Bit posn to feed into carry */
ISM32 i;
ISM32 new_of;
/* only use lower five bits of count */
if ( (op2 &= 0x1f) == 0 )
return;
/*
==== =================
-- |CF| <-- | | | | | | | | | <--
| ==== ================= |
---------------------------------
*/
feedback = SZ2MSB(op_sz);
for ( result = *pop1, i = 0; i < op2; i++ )
{
if ( result & feedback )
{
result = result << 1 | GET_CF();
SET_CF(1);
}
else
{
result = result << 1 | GET_CF();
SET_CF(0);
}
}
/* OF = CF ^ MSB of result */
new_of = GET_CF() ^ (result & feedback) != 0;
if ( op2 == 1 )
{
SET_OF(new_of);
}
else
{
do_multiple_shiftrot_of(new_of);
}
*pop1 = result; /* Return answer */
}
GLOBAL VOID
DAA()
{
IU8 temp_al;
temp_al = GET_AL();
if ( (temp_al & 0xf) > 9 || GET_AF() )
{
temp_al += 6;
SET_AF(1);
}
if ( GET_AL() > 0x99 || GET_CF() )
{
temp_al += 0x60;
SET_CF(1);
}
SET_AL(temp_al);
/* set ZF,SF,PF according to result */
SET_ZF(temp_al == 0);
SET_SF((temp_al & BIT7_MASK) != 0);
SET_PF(pf_table[temp_al]);
/* Set undefined flag(s) */
#ifdef SET_UNDEFINED_FLAG
SET_OF(UNDEFINED_FLAG);
#endif
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
GLOBAL VOID
BTC
IFN3(
IU32 *, pop1, /* pntr to lsrc/dst operand */
IU32, op2, /* rsrc (ie bit nr.) operand */
IUM8, op_sz /* 16 or 32-bit */
)
{
IU32 bit_mask;
op2 = op2 % op_sz; /* take bit nr. modulo operand size */
bit_mask = 1 << op2; /* form mask for bit */
SET_CF((*pop1 & bit_mask) != 0); /* set CF to given bit */
*pop1 = *pop1 ^ bit_mask; /* Set Bit = !Bit */
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
GLOBAL VOID
SBB
IFN3(
IU32 *, pop1, /* pntr to dst/lsrc operand */
IU32, op2, /* rsrc operand */
IUM8, op_sz /* 8, 16 or 32-bit */
)
{
IU32 result;
IU32 carry;
IU32 msb;
IU32 op1_msb;
IU32 op2_msb;
IU32 res_msb;
msb = SZ2MSB(op_sz);
/* Do operation */
result = *pop1 - op2 - GET_CF() & SZ2MASK(op_sz);
op1_msb = (*pop1 & msb) != 0; /* Isolate all msb's */
op2_msb = (op2 & msb) != 0;
res_msb = (result & msb) != 0;
carry = *pop1 ^ op2 ^ result; /* Isolate carries */
/* Determine flags */
/*
OF = (op1 == !op2) & (op1 ^ res)
ie if operand signs differ and res sign different to original
destination set OF.
*/
SET_OF((op1_msb != op2_msb) & (op1_msb ^ res_msb));
/*
Formally:- CF = !op1 & op2 | res & !op1 | res & op2
Equivalently:- CF = OF ^ op1 ^ op2 ^ res
*/
SET_CF(((carry & msb) != 0) ^ GET_OF());
SET_PF(pf_table[result & BYTE_MASK]);
SET_ZF(result == 0);
SET_SF((result & msb) != 0); /* SF = MSB */
SET_AF((carry & BIT4_MASK) != 0); /* AF = Bit 4 carry */
*pop1 = result; /* Return answer */
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
GLOBAL VOID
XOR
IFN3(
IU32 *, pop1, /* pntr to dst/lsrc operand */
IU32, op2, /* rsrc operand */
IUM8, op_sz /* 8, 16 or 32-bit */
)
{
IU32 result;
result = *pop1 ^ op2; /* Do operation */
SET_CF(0); /* Determine flags */
SET_OF(0);
SET_AF(0);
SET_PF(pf_table[result & BYTE_MASK]);
SET_ZF(result == 0);
SET_SF((result & SZ2MSB(op_sz)) != 0); /* SF = MSB */
*pop1 = result; /* Return answer */
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
GLOBAL VOID
ROR
IFN3(
IU32 *, pop1, /* pntr to dst/src operand */
IU32, op2, /* rotation count operand */
IUM8, op_sz /* 8, 16 or 32-bit */
)
{
IU32 result;
IU32 feedback; /* Bit posn to feed Bit 0 back to */
ISM32 i;
ISM32 new_of;
/* only use lower five bits of count */
if ( (op2 &= 0x1f) == 0 )
return;
/*
================= ====
-> | | | | | | | | | --- --> |CF|
| ================= | ====
------------------------
*/
feedback = SZ2MSB(op_sz);
for ( result = *pop1, i = 0; i < op2; i++ )
{
if ( result & BIT0_MASK )
{
result = result >> 1 | feedback;
SET_CF(1);
}
else
{
void BIOSCALL apm_function(sys_regs_t r)
{
BX_DEBUG_APM("APM: AX=%04X BX=%04X CX=%04X\n", AX, BX, CX);
CLEAR_CF(); /* Boldly expect success. */
switch (GET_AL()) {
case APM_CHECK:
AX = 0x0102; /* Version 1.2 */
BX = 0x504D; /* 'PM' */
CX = 3; /* Bits 0/1: 16-bit/32-bit PM interface */
break;
case APM_RM_CONN:
// @todo: validate device ID
// @todo: validate current connection state
// @todo: change connection state
break;
case APM_PM_CONN:
// @todo: validate device ID
// @todo: validate current connection state
// @todo: change connection state
AX = APM_BIOS_SEG; /* 16-bit PM code segment (RM segment base). */
BX = (uint16_t)apm_pm16_entry; /* 16-bit PM entry point offset. */
CX = APM_BIOS_SEG; /* 16-bit data segment. */
SI = APM_BIOS_SEG_LEN; /* 16-bit PM code segment length. */
DI = APM_BIOS_SEG_LEN; /* Data segment length. */
break;
case APM_32_CONN:
// @todo: validate device ID
// @todo: validate current connection state
// @todo: change connection state
AX = APM_BIOS_SEG; /* 32-bit PM code segment (RM segment base). */
BX = (uint16_t)apm_pm32_entry; /* 32-bit entry point offset. */
CX = APM_BIOS_SEG; /* 16-bit code segment. */
DX = APM_BIOS_SEG; /* 16-bit data segment. */
SI = APM_BIOS_SEG_LEN; /* 32-bit code segment length. */
DI = APM_BIOS_SEG_LEN; /* Data segment length. */
set_ebx_hi(0);
set_esi_hi(APM_BIOS_SEG_LEN); /* 16-bit code segment length. */
break;
case APM_IDLE:
int_enable(); /* Simply halt the CPU with interrupts enabled. */
halt();
break;
case APM_SET_PWR:
// @todo: validate device ID
// @todo: validate current connection state
switch (CX) {
case APM_PS_STANDBY:
apm_out_str("Standby", APM_PORT);
break;
case APM_PS_SUSPEND:
apm_out_str("Suspend", APM_PORT);
break;
case APM_PS_OFF:
apm_out_str("Shutdown", APM_PORT); /* Should not return. */
break;
default:
SET_AH(APM_ERR_INVAL_PARAM);
SET_CF();
}
break;
case APM_DRV_VER:
AX = 0x0102; // @todo: Not right - must take driver version into account!
break;
case APM_DISCONN:
// @todo: actually perform a disconnect...
case APM_BUSY: /* Nothing to do as APM Idle doesn't slow CPU clock. */
break;
case APM_GET_EVT:
// @todo: error should be different if interface not connected + engaged
SET_AH(APM_ERR_NO_EVENTS); /* PM events don't happen. */
SET_CF();
break;
default:
BX_INFO("APM: Unsupported function AX=%04X BX=%04X called\n", AX, BX);
SET_AH(APM_ERR_UNSUPPORTED);
SET_CF();
}
}
GLOBAL VOID
CLC()
{
SET_CF(0);
}
void BIOSCALL int13_cdrom(uint16_t EHBX, disk_regs_t r)
{
uint16_t ebda_seg = read_word(0x0040,0x000E);
uint8_t device, status, locks;
cdb_atapi atapicmd;
uint32_t lba;
uint16_t count, segment, offset, size;
bio_dsk_t __far *bios_dsk;
int13ext_t __far *i13x;
dpt_t __far *dpt;
bios_dsk = ebda_seg :> &EbdaData->bdisk;
BX_DEBUG_INT13_CD("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES);
SET_DISK_RET_STATUS(0x00);
/* basic check : device should be 0xE0+ */
if( (GET_ELDL() < 0xE0) || (GET_ELDL() >= 0xE0 + BX_MAX_STORAGE_DEVICES) ) {
BX_DEBUG("%s: function %02x, ELDL out of range %02x\n", __func__, GET_AH(), GET_ELDL());
goto int13_fail;
}
// Get the ata channel
device = bios_dsk->cdidmap[GET_ELDL()-0xE0];
/* basic check : device has to be valid */
if (device >= BX_MAX_STORAGE_DEVICES) {
BX_DEBUG("%s: function %02x, unmapped device for ELDL=%02x\n", __func__, GET_AH(), GET_ELDL());
goto int13_fail;
}
switch (GET_AH()) {
// all those functions return SUCCESS
case 0x00: /* disk controller reset */
case 0x09: /* initialize drive parameters */
case 0x0c: /* seek to specified cylinder */
case 0x0d: /* alternate disk reset */
case 0x10: /* check drive ready */
case 0x11: /* recalibrate */
case 0x14: /* controller internal diagnostic */
case 0x16: /* detect disk change */
goto int13_success;
break;
// all those functions return disk write-protected
case 0x03: /* write disk sectors */
case 0x05: /* format disk track */
case 0x43: // IBM/MS extended write
SET_AH(0x03);
goto int13_fail_noah;
break;
case 0x01: /* read disk status */
status = read_byte(0x0040, 0x0074);
SET_AH(status);
SET_DISK_RET_STATUS(0);
/* set CF if error status read */
if (status)
goto int13_fail_nostatus;
else
goto int13_success_noah;
break;
case 0x15: /* read disk drive size */
SET_AH(0x02);
goto int13_fail_noah;
break;
case 0x41: // IBM/MS installation check
BX = 0xaa55; // install check
SET_AH(0x30); // EDD 2.1
CX = 0x0007; // ext disk access, removable and edd
goto int13_success_noah;
break;
case 0x42: // IBM/MS extended read
case 0x44: // IBM/MS verify sectors
case 0x47: // IBM/MS extended seek
/* Load the I13X struct pointer. */
i13x = MK_FP(DS, SI);
count = i13x->count;
segment = i13x->segment;
offset = i13x->offset;
// Can't use 64 bits lba
lba = i13x->lba2;
if (lba != 0L) {
BX_PANIC("%s: function %02x. Can't use 64bits lba\n", __func__, GET_AH());
goto int13_fail;
}
// Get 32 bits lba
lba = i13x->lba1;
// If verify or seek
if (( GET_AH() == 0x44 ) || ( GET_AH() == 0x47 ))
goto int13_success;
BX_DEBUG_INT13_CD("%s: read %u sectors @ LBA %lu to %04X:%04X\n",
__func__, count, lba, segment, offset);
_fmemset(&atapicmd, 0, sizeof(atapicmd));
atapicmd.command = 0x28; // READ 10 command
atapicmd.lba = swap_32(lba);
atapicmd.nsect = swap_16(count);
bios_dsk->drqp.nsect = count;
bios_dsk->drqp.sect_sz = 2048;
status = pktacc[bios_dsk->devices[device].type](device, 12, (char __far *)&atapicmd, 0, count*2048L, ATA_DATA_IN, MK_FP(segment,offset));
count = (uint16_t)(bios_dsk->drqp.trsfbytes >> 11);
i13x->count = count;
if (status != 0) {
BX_INFO("%s: function %02x, status %02x !\n", __func__, GET_AH(), status);
SET_AH(0x0c);
goto int13_fail_noah;
}
goto int13_success;
break;
case 0x45: // IBM/MS lock/unlock drive
if (GET_AL() > 2)
goto int13_fail;
locks = bios_dsk->devices[device].lock;
switch (GET_AL()) {
case 0 : // lock
if (locks == 0xff) {
SET_AH(0xb4);
SET_AL(1);
goto int13_fail_noah;
}
bios_dsk->devices[device].lock = ++locks;
SET_AL(1);
break;
case 1 : // unlock
if (locks == 0x00) {
SET_AH(0xb0);
SET_AL(0);
goto int13_fail_noah;
}
bios_dsk->devices[device].lock = --locks;
SET_AL(locks==0?0:1);
break;
case 2 : // status
SET_AL(locks==0?0:1);
break;
}
goto int13_success;
break;
case 0x46: // IBM/MS eject media
locks = bios_dsk->devices[device].lock;
if (locks != 0) {
SET_AH(0xb1); // media locked
goto int13_fail_noah;
}
// FIXME should handle 0x31 no media in device
// FIXME should handle 0xb5 valid request failed
#if 0 //@todo: implement!
// Call removable media eject
ASM_START
push bp
mov bp, sp
mov ah, #0x52
int #0x15
mov _int13_cdrom.status + 2[bp], ah
jnc int13_cdrom_rme_end
mov _int13_cdrom.status, #1
int13_cdrom_rme_end:
pop bp
ASM_END
#endif
if (status != 0) {
SET_AH(0xb1); // media locked
goto int13_fail_noah;
}
goto int13_success;
break;
//@todo: Part of this should be merged with analogous code in disk.c
case 0x48: // IBM/MS get drive parameters
dpt = DS :> (dpt_t *)SI;
size = dpt->size;
// Buffer is too small
if (size < 0x1a)
goto int13_fail;
// EDD 1.x
if (size >= 0x1a) {
uint16_t blksize;
blksize = bios_dsk->devices[device].blksize;
dpt->size = 0x1a;
dpt->infos = 0x74; /* Removable, media change, lockable, max values */
dpt->cylinders = 0xffffffff;
dpt->heads = 0xffffffff;
dpt->spt = 0xffffffff;
dpt->blksize = blksize;
dpt->sector_count1 = 0xffffffff; // FIXME should be Bit64
dpt->sector_count2 = 0xffffffff;
}
// EDD 2.x
if(size >= 0x1e) {
uint8_t channel, irq, mode, checksum, i;
uint16_t iobase1, iobase2, options;
dpt->size = 0x1e;
dpt->dpte_segment = ebda_seg;
dpt->dpte_offset = (uint16_t)&EbdaData->bdisk.dpte;
// Fill in dpte
channel = device / 2;
iobase1 = bios_dsk->channels[channel].iobase1;
iobase2 = bios_dsk->channels[channel].iobase2;
irq = bios_dsk->channels[channel].irq;
mode = bios_dsk->devices[device].mode;
// FIXME atapi device
options = (1<<4); // lba translation
options |= (1<<5); // removable device
options |= (1<<6); // atapi device
#if VBOX_BIOS_CPU >= 80386
options |= (mode==ATA_MODE_PIO32?1:0<<7);
#endif
bios_dsk->dpte.iobase1 = iobase1;
bios_dsk->dpte.iobase2 = iobase2;
bios_dsk->dpte.prefix = (0xe | (device % 2))<<4;
bios_dsk->dpte.unused = 0xcb;
bios_dsk->dpte.irq = irq;
bios_dsk->dpte.blkcount = 1 ;
bios_dsk->dpte.dma = 0;
bios_dsk->dpte.pio = 0;
bios_dsk->dpte.options = options;
bios_dsk->dpte.reserved = 0;
bios_dsk->dpte.revision = 0x11;
checksum = 0;
for (i = 0; i < 15; ++i)
checksum += read_byte(ebda_seg, (uint16_t)&EbdaData->bdisk.dpte + i);
checksum = -checksum;
bios_dsk->dpte.checksum = checksum;
}
// EDD 3.x
if(size >= 0x42) {
uint8_t channel, iface, checksum, i;
uint16_t iobase1;
channel = device / 2;
iface = bios_dsk->channels[channel].iface;
iobase1 = bios_dsk->channels[channel].iobase1;
dpt->size = 0x42;
dpt->key = 0xbedd;
dpt->dpi_length = 0x24;
dpt->reserved1 = 0;
dpt->reserved2 = 0;
if (iface == ATA_IFACE_ISA) {
dpt->host_bus[0] = 'I';
dpt->host_bus[1] = 'S';
dpt->host_bus[2] = 'A';
dpt->host_bus[3] = ' ';
}
else {
// FIXME PCI
}
dpt->iface_type[0] = 'A';
dpt->iface_type[1] = 'T';
dpt->iface_type[2] = 'A';
dpt->iface_type[3] = ' ';
dpt->iface_type[4] = ' ';
dpt->iface_type[5] = ' ';
dpt->iface_type[6] = ' ';
dpt->iface_type[7] = ' ';
if (iface == ATA_IFACE_ISA) {
((uint16_t __far *)dpt->iface_path)[0] = iobase1;
((uint16_t __far *)dpt->iface_path)[1] = 0;
((uint32_t __far *)dpt->iface_path)[1] = 0;
}
else {
// FIXME PCI
}
((uint16_t __far *)dpt->device_path)[0] = device & 1;
((uint16_t __far *)dpt->device_path)[1] = 0;
((uint32_t __far *)dpt->device_path)[1] = 0;
checksum = 0;
for (i = 30; i < 64; ++i)
checksum += ((uint8_t __far *)dpt)[i];
checksum = -checksum;
dpt->checksum = checksum;
}
goto int13_success;
break;
case 0x49: // IBM/MS extended media change
// always send changed ??
SET_AH(06);
goto int13_fail_nostatus;
break;
case 0x4e: // // IBM/MS set hardware configuration
// DMA, prefetch, PIO maximum not supported
switch (GET_AL()) {
case 0x01:
case 0x03:
case 0x04:
case 0x06:
goto int13_success;
break;
default :
goto int13_fail;
}
break;
// all those functions return unimplemented
case 0x02: /* read sectors */
case 0x04: /* verify sectors */
case 0x08: /* read disk drive parameters */
case 0x0a: /* read disk sectors with ECC */
case 0x0b: /* write disk sectors with ECC */
case 0x18: /* set media type for format */
case 0x50: // ? - send packet command
default:
BX_INFO("%s: unsupported AH=%02x\n", __func__, GET_AH());
goto int13_fail;
break;
}
int13_fail:
SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
int13_fail_noah:
SET_DISK_RET_STATUS(GET_AH());
int13_fail_nostatus:
SET_CF(); // error occurred
return;
int13_success:
SET_AH(0x00); // no error
int13_success_noah:
SET_DISK_RET_STATUS(0x00);
CLEAR_CF(); // no error
return;
}
void BIOSCALL int13_cdemu(disk_regs_t r)
{
// @TODO: a macro or a function for getting the EBDA segment
uint16_t ebda_seg=read_word(0x0040,0x000E);
uint8_t device, status;
uint16_t vheads, vspt, vcylinders;
uint16_t head, sector, cylinder, nbsectors;
uint32_t vlba, ilba, slba, elba;
uint16_t before, segment, offset;
cdb_atapi atapicmd;
cdemu_t __far *cdemu;
bio_dsk_t __far *bios_dsk;
cdemu = ebda_seg :> &EbdaData->cdemu;
bios_dsk = ebda_seg :> &EbdaData->bdisk;
BX_DEBUG_INT13_ET("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES);
/* at this point, we are emulating a floppy/harddisk */
// Recompute the device number
device = cdemu->controller_index * 2;
device += cdemu->device_spec;
SET_DISK_RET_STATUS(0x00);
/* basic checks : emulation should be active, dl should equal the emulated drive */
if (!cdemu->active || (cdemu->emulated_drive != GET_DL())) {
BX_INFO("%s: function %02x, emulation not active for DL= %02x\n", __func__, GET_AH(), GET_DL());
goto int13_fail;
}
switch (GET_AH()) {
case 0x00: /* disk controller reset */
if (pktacc[bios_dsk->devices[device].type])
{
status = softrst[bios_dsk->devices[device].type](device);
}
goto int13_success;
break;
// all those functions return SUCCESS
case 0x09: /* initialize drive parameters */
case 0x0c: /* seek to specified cylinder */
case 0x0d: /* alternate disk reset */ // FIXME ElTorito Various. should really reset ?
case 0x10: /* check drive ready */ // FIXME ElTorito Various. should check if ready ?
case 0x11: /* recalibrate */
case 0x14: /* controller internal diagnostic */
case 0x16: /* detect disk change */
goto int13_success;
break;
// all those functions return disk write-protected
case 0x03: /* write disk sectors */
case 0x05: /* format disk track */
SET_AH(0x03);
goto int13_fail_noah;
break;
case 0x01: /* read disk status */
status=read_byte(0x0040, 0x0074);
SET_AH(status);
SET_DISK_RET_STATUS(0);
/* set CF if error status read */
if (status)
goto int13_fail_nostatus;
else
goto int13_success_noah;
break;
case 0x02: // read disk sectors
case 0x04: // verify disk sectors
vspt = cdemu->vdevice.spt;
vcylinders = cdemu->vdevice.cylinders;
vheads = cdemu->vdevice.heads;
ilba = cdemu->ilba;
sector = GET_CL() & 0x003f;
cylinder = (GET_CL() & 0x00c0) << 2 | GET_CH();
head = GET_DH();
nbsectors = GET_AL();
segment = ES;
offset = BX;
BX_DEBUG_INT13_ET("%s: read to %04x:%04x @ VCHS %u/%u/%u (%u sectors)\n", __func__,
ES, BX, cylinder, head, sector, nbsectors);
// no sector to read ?
if(nbsectors==0)
goto int13_success;
// sanity checks sco openserver needs this!
if ((sector > vspt)
|| (cylinder >= vcylinders)
|| (head >= vheads)) {
goto int13_fail;
}
// After validating the input, verify does nothing
if (GET_AH() == 0x04)
goto int13_success;
segment = ES+(BX / 16);
offset = BX % 16;
// calculate the virtual lba inside the image
vlba=((((uint32_t)cylinder*(uint32_t)vheads)+(uint32_t)head)*(uint32_t)vspt)+((uint32_t)(sector-1));
// In advance so we don't lose the count
SET_AL(nbsectors);
// start lba on cd
slba = (uint32_t)vlba / 4;
before = (uint32_t)vlba % 4;
// end lba on cd
elba = (uint32_t)(vlba + nbsectors - 1) / 4;
_fmemset(&atapicmd, 0, sizeof(atapicmd));
atapicmd.command = 0x28; // READ 10 command
atapicmd.lba = swap_32(ilba + slba);
atapicmd.nsect = swap_16(elba - slba + 1);
bios_dsk->drqp.nsect = nbsectors;
bios_dsk->drqp.sect_sz = 512;
bios_dsk->drqp.skip_b = before * 512;
bios_dsk->drqp.skip_a = ((4 - nbsectors % 4 - before) * 512) % 2048;
status = pktacc[bios_dsk->devices[device].type](device, 12, (char __far *)&atapicmd, before*512, nbsectors*512L, ATA_DATA_IN, MK_FP(segment,offset));
bios_dsk->drqp.skip_b = 0;
bios_dsk->drqp.skip_a = 0;
if (status != 0) {
BX_INFO("%s: function %02x, error %02x !\n", __func__, GET_AH(), status);
SET_AH(0x02);
SET_AL(0);
goto int13_fail_noah;
}
goto int13_success;
break;
case 0x08: /* read disk drive parameters */
vspt = cdemu->vdevice.spt;
vcylinders = cdemu->vdevice.cylinders - 1;
vheads = cdemu->vdevice.heads - 1;
SET_AL( 0x00 );
SET_BL( 0x00 );
SET_CH( vcylinders & 0xff );
SET_CL((( vcylinders >> 2) & 0xc0) | ( vspt & 0x3f ));
SET_DH( vheads );
SET_DL( 0x02 ); // FIXME ElTorito Various. should send the real count of drives 1 or 2
// FIXME ElTorito Harddisk. should send the HD count
switch (cdemu->media) {
case 0x01: SET_BL( 0x02 ); break; /* 1.2 MB */
case 0x02: SET_BL( 0x04 ); break; /* 1.44 MB */
case 0x03: SET_BL( 0x05 ); break; /* 2.88 MB */
}
/* Only set the DPT pointer for emulated floppies. */
if (cdemu->media < 4) {
DI = (uint16_t)&diskette_param_table; // @todo: should this depend on emulated medium?
ES = 0xF000; // @todo: how to make this relocatable?
}
goto int13_success;
break;
case 0x15: /* read disk drive size */
// FIXME ElTorito Harddisk. What geometry to send ?
SET_AH(0x03);
goto int13_success_noah;
break;
// all those functions return unimplemented
case 0x0a: /* read disk sectors with ECC */
case 0x0b: /* write disk sectors with ECC */
case 0x18: /* set media type for format */
case 0x41: // IBM/MS installation check
// FIXME ElTorito Harddisk. Darwin would like to use EDD
case 0x42: // IBM/MS extended read
case 0x43: // IBM/MS extended write
case 0x44: // IBM/MS verify sectors
case 0x45: // IBM/MS lock/unlock drive
case 0x46: // IBM/MS eject media
case 0x47: // IBM/MS extended seek
case 0x48: // IBM/MS get drive parameters
case 0x49: // IBM/MS extended media change
case 0x4e: // ? - set hardware configuration
case 0x50: // ? - send packet command
default:
BX_INFO("%s: function AH=%02x unsupported, returns fail\n", __func__, GET_AH());
goto int13_fail;
break;
}
int13_fail:
SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
int13_fail_noah:
SET_DISK_RET_STATUS(GET_AH());
int13_fail_nostatus:
SET_CF(); // error occurred
return;
int13_success:
SET_AH(0x00); // no error
int13_success_noah:
SET_DISK_RET_STATUS(0x00);
CLEAR_CF(); // no error
return;
}
void BIOSCALL int13_eltorito(disk_regs_t r)
{
// @TODO: a macro or a function for getting the EBDA segment
uint16_t ebda_seg=read_word(0x0040,0x000E);
cdemu_t __far *cdemu;
cdemu = ebda_seg :> &EbdaData->cdemu;
BX_DEBUG_INT13_ET("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES);
// BX_DEBUG_INT13_ET("%s: SS=%04x DS=%04x ES=%04x DI=%04x SI=%04x\n", __func__, get_SS(), DS, ES, DI, SI);
switch (GET_AH()) {
// FIXME ElTorito Various. Not implemented in many real BIOSes.
case 0x4a: // ElTorito - Initiate disk emu
case 0x4c: // ElTorito - Initiate disk emu and boot
case 0x4d: // ElTorito - Return Boot catalog
BX_INFO("%s: call with AX=%04x not implemented.\n", __func__, AX);
goto int13_fail;
break;
case 0x4b: // ElTorito - Terminate disk emu
// FIXME ElTorito Hardcoded
//@todo: maybe our cdemu struct should match El Torito to allow memcpy()?
write_byte(DS,SI+0x00,0x13);
write_byte(DS,SI+0x01,cdemu->media);
write_byte(DS,SI+0x02,cdemu->emulated_drive);
write_byte(DS,SI+0x03,cdemu->controller_index);
write_dword(DS,SI+0x04,cdemu->ilba);
write_word(DS,SI+0x08,cdemu->device_spec);
write_word(DS,SI+0x0a,cdemu->buffer_segment);
write_word(DS,SI+0x0c,cdemu->load_segment);
write_word(DS,SI+0x0e,cdemu->sector_count);
write_byte(DS,SI+0x10,cdemu->vdevice.cylinders);
write_byte(DS,SI+0x11,cdemu->vdevice.spt);
write_byte(DS,SI+0x12,cdemu->vdevice.heads);
// If we have to terminate emulation
if(GET_AL() == 0x00) {
// FIXME ElTorito Various. Should be handled accordingly to spec
cdemu->active = 0; // bye bye
}
goto int13_success;
break;
default:
BX_INFO("%s: unsupported AH=%02x\n", __func__, GET_AH());
goto int13_fail;
break;
}
int13_fail:
SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
SET_DISK_RET_STATUS(GET_AH());
SET_CF(); // error occurred
return;
int13_success:
SET_AH(0x00); // no error
SET_DISK_RET_STATUS(0x00);
CLEAR_CF(); // no error
return;
}
void BIOSCALL int13_harddisk(disk_regs_t r)
{
uint32_t lba;
uint16_t cylinder, head, sector;
uint16_t nlc, nlh, nlspt;
uint16_t count;
uint8_t device, status;
bio_dsk_t __far *bios_dsk;
BX_DEBUG_INT13_HD("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES);
bios_dsk = read_word(0x0040,0x000E) :> &EbdaData->bdisk;
write_byte(0x0040, 0x008e, 0); // clear completion flag
// basic check : device has to be defined
if ( (GET_ELDL() < 0x80) || (GET_ELDL() >= 0x80 + BX_MAX_STORAGE_DEVICES) ) {
BX_DEBUG("%s: function %02x, ELDL out of range %02x\n", __func__, GET_AH(), GET_ELDL());
goto int13_fail;
}
// Get the ata channel
device = bios_dsk->hdidmap[GET_ELDL()-0x80];
// basic check : device has to be valid
if (device >= BX_MAX_STORAGE_DEVICES) {
BX_DEBUG("%s: function %02x, unmapped device for ELDL=%02x\n", __func__, GET_AH(), GET_ELDL());
goto int13_fail;
}
switch (GET_AH()) {
case 0x00: /* disk controller reset */
#ifdef VBOX_WITH_SCSI
/* SCSI controller does not need a reset. */
if (!VBOX_IS_SCSI_DEVICE(device))
#endif
ata_reset (device);
goto int13_success;
break;
case 0x01: /* read disk status */
status = read_byte(0x0040, 0x0074);
SET_AH(status);
SET_DISK_RET_STATUS(0);
/* set CF if error status read */
if (status) goto int13_fail_nostatus;
else goto int13_success_noah;
break;
case 0x02: // read disk sectors
case 0x03: // write disk sectors
case 0x04: // verify disk sectors
count = GET_AL();
cylinder = GET_CH();
cylinder |= ( ((uint16_t) GET_CL()) << 2) & 0x300;
sector = (GET_CL() & 0x3f);
head = GET_DH();
/* Segment and offset are in ES:BX. */
if ( (count > 128) || (count == 0) ) {
BX_INFO("%s: function %02x, count out of range!\n", __func__, GET_AH());
goto int13_fail;
}
/* Get the logical CHS geometry. */
nlc = bios_dsk->devices[device].lchs.cylinders;
nlh = bios_dsk->devices[device].lchs.heads;
nlspt = bios_dsk->devices[device].lchs.spt;
/* Sanity check the geometry. */
if( (cylinder >= nlc) || (head >= nlh) || (sector > nlspt )) {
BX_INFO("%s: function %02x, disk %02x, parameters out of range %04x/%04x/%04x!\n", __func__, GET_AH(), GET_DL(), cylinder, head, sector);
goto int13_fail;
}
// FIXME verify
if ( GET_AH() == 0x04 )
goto int13_success;
/* If required, translate LCHS to LBA and execute command. */
//@todo: The IS_SCSI_DEVICE check should be redundant...
if (( (bios_dsk->devices[device].pchs.heads != nlh) || (bios_dsk->devices[device].pchs.spt != nlspt)) || VBOX_IS_SCSI_DEVICE(device)) {
lba = ((((uint32_t)cylinder * (uint32_t)nlh) + (uint32_t)head) * (uint32_t)nlspt) + (uint32_t)sector - 1;
sector = 0; // this forces the command to be lba
}
/* Clear the count of transferred sectors/bytes. */
bios_dsk->drqp.trsfsectors = 0;
bios_dsk->drqp.trsfbytes = 0;
/* Pass request information to low level disk code. */
bios_dsk->drqp.lba = lba;
bios_dsk->drqp.buffer = MK_FP(ES, BX);
bios_dsk->drqp.nsect = count;
bios_dsk->drqp.sect_sz = 512; //@todo: device specific?
bios_dsk->drqp.cylinder = cylinder;
bios_dsk->drqp.head = head;
bios_dsk->drqp.sector = sector;
bios_dsk->drqp.dev_id = device;
status = dskacc[bios_dsk->devices[device].type].a[GET_AH() - 0x02](bios_dsk);
// Set nb of sector transferred
SET_AL(bios_dsk->drqp.trsfsectors);
if (status != 0) {
BX_INFO("%s: function %02x, error %02x !\n", __func__, GET_AH(), status);
SET_AH(0x0c);
goto int13_fail_noah;
}
goto int13_success;
break;
case 0x05: /* format disk track */
BX_INFO("format disk track called\n");
goto int13_success;
return;
break;
case 0x08: /* read disk drive parameters */
/* Get the logical geometry from internal table. */
nlc = bios_dsk->devices[device].lchs.cylinders;
nlh = bios_dsk->devices[device].lchs.heads;
nlspt = bios_dsk->devices[device].lchs.spt;
count = bios_dsk->hdcount;
/* Maximum cylinder number is just one less than the number of cylinders. */
nlc = nlc - 1; /* 0 based , last sector not used */
SET_AL(0);
SET_CH(nlc & 0xff);
SET_CL(((nlc >> 2) & 0xc0) | (nlspt & 0x3f));
SET_DH(nlh - 1);
SET_DL(count); /* FIXME returns 0, 1, or n hard drives */
// FIXME should set ES & DI
// @todo: Actually, the above comment is nonsense.
goto int13_success;
break;
case 0x10: /* check drive ready */
// should look at 40:8E also???
// Read the status from controller
status = inb(bios_dsk->channels[device/2].iobase1 + ATA_CB_STAT);
if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY ) {
goto int13_success;
} else {
SET_AH(0xAA);
goto int13_fail_noah;
}
break;
case 0x15: /* read disk drive size */
/* Get the physical geometry from internal table. */
cylinder = bios_dsk->devices[device].pchs.cylinders;
head = bios_dsk->devices[device].pchs.heads;
sector = bios_dsk->devices[device].pchs.spt;
/* Calculate sector count seen by old style INT 13h. */
lba = (uint32_t)cylinder * head * sector;
CX = lba >> 16;
DX = lba & 0xffff;
SET_AH(3); // hard disk accessible
goto int13_success_noah;
break;
case 0x09: /* initialize drive parameters */
case 0x0c: /* seek to specified cylinder */
case 0x0d: /* alternate disk reset */
case 0x11: /* recalibrate */
case 0x14: /* controller internal diagnostic */
BX_INFO("%s: function %02xh unimplemented, returns success\n", __func__, GET_AH());
goto int13_success;
break;
case 0x0a: /* read disk sectors with ECC */
case 0x0b: /* write disk sectors with ECC */
case 0x18: // set media type for format
default:
BX_INFO("%s: function %02xh unsupported, returns fail\n", __func__, GET_AH());
goto int13_fail;
break;
}
int13_fail:
SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
int13_fail_noah:
SET_DISK_RET_STATUS(GET_AH());
int13_fail_nostatus:
SET_CF(); // error occurred
return;
int13_success:
SET_AH(0x00); // no error
int13_success_noah:
SET_DISK_RET_STATUS(0x00);
CLEAR_CF(); // no error
return;
}
void BIOSCALL int13_harddisk_ext(disk_regs_t r)
{
uint32_t lba;
uint16_t ebda_seg = read_word(0x0040,0x000E);
uint16_t segment, offset;
uint16_t npc, nph, npspt;
uint16_t size, count;
uint8_t device, status;
uint8_t type;
bio_dsk_t __far *bios_dsk;
int13ext_t __far *i13_ext;
dpt_t __far *dpt;
bios_dsk = read_word(0x0040,0x000E) :> &EbdaData->bdisk;
BX_DEBUG_INT13_HD("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES);
write_byte(0x0040, 0x008e, 0); // clear completion flag
// basic check : device has to be defined
if ( (GET_ELDL() < 0x80) || (GET_ELDL() >= 0x80 + BX_MAX_STORAGE_DEVICES) ) {
BX_DEBUG("%s: function %02x, ELDL out of range %02x\n", __func__, GET_AH(), GET_ELDL());
goto int13x_fail;
}
// Get the ata channel
device = bios_dsk->hdidmap[GET_ELDL()-0x80];
// basic check : device has to be valid
if (device >= BX_MAX_STORAGE_DEVICES) {
BX_DEBUG("%s: function %02x, unmapped device for ELDL=%02x\n", __func__, GET_AH(), GET_ELDL());
goto int13x_fail;
}
switch (GET_AH()) {
case 0x41: // IBM/MS installation check
BX=0xaa55; // install check
SET_AH(0x30); // EDD 3.0
CX=0x0007; // ext disk access and edd, removable supported
goto int13x_success_noah;
break;
case 0x42: // IBM/MS extended read
case 0x43: // IBM/MS extended write
case 0x44: // IBM/MS verify
case 0x47: // IBM/MS extended seek
/* Get a pointer to the extended structure. */
i13_ext = DS :> (int13ext_t *)SI;
count = i13_ext->count;
segment = i13_ext->segment;
offset = i13_ext->offset;
BX_DEBUG_INT13_HD("%s: %d sectors from lba %u @ %04x:%04x\n", __func__,
count, i13_ext->lba1, segment, offset);
// Can't use 64 bits lba
lba = i13_ext->lba2;
if (lba != 0L) {
BX_PANIC("%s: function %02x. Can't use 64bits lba\n", __func__, GET_AH());
goto int13x_fail;
}
// Get 32 bits lba and check
lba = i13_ext->lba1;
type = bios_dsk->devices[device].type;
if (lba >= bios_dsk->devices[device].sectors) {
BX_INFO("%s: function %02x. LBA out of range\n", __func__, GET_AH());
goto int13x_fail;
}
/* Don't bother with seek or verify. */
if (( GET_AH() == 0x44 ) || ( GET_AH() == 0x47 ))
goto int13x_success;
/* Clear the count of transferred sectors/bytes. */
bios_dsk->drqp.trsfsectors = 0;
bios_dsk->drqp.trsfbytes = 0;
/* Pass request information to low level disk code. */
bios_dsk->drqp.lba = lba;
bios_dsk->drqp.buffer = MK_FP(segment, offset);
bios_dsk->drqp.nsect = count;
bios_dsk->drqp.sect_sz = 512; //@todo: device specific?
bios_dsk->drqp.sector = 0; /* Indicate LBA. */
bios_dsk->drqp.dev_id = device;
/* Execute the read or write command. */
status = dskacc[type].a[GET_AH() - 0x42](bios_dsk);
count = bios_dsk->drqp.trsfsectors;
i13_ext->count = count;
if (status != 0) {
BX_INFO("%s: function %02x, error %02x !\n", __func__, GET_AH(), status);
SET_AH(0x0c);
goto int13x_fail_noah;
}
goto int13x_success;
break;
case 0x45: // IBM/MS lock/unlock drive
case 0x49: // IBM/MS extended media change
goto int13x_success; // Always success for HD
break;
case 0x46: // IBM/MS eject media
SET_AH(0xb2); // Volume Not Removable
goto int13x_fail_noah; // Always fail for HD
break;
case 0x48: // IBM/MS get drive parameters
dpt = DS :> (dpt_t *)SI;
size = dpt->size;
/* Check if buffer is large enough. */
if (size < 0x1a)
goto int13x_fail;
/* Fill in EDD 1.x table. */
if (size >= 0x1a) {
uint16_t blksize;
npc = bios_dsk->devices[device].pchs.cylinders;
nph = bios_dsk->devices[device].pchs.heads;
npspt = bios_dsk->devices[device].pchs.spt;
lba = bios_dsk->devices[device].sectors;
blksize = bios_dsk->devices[device].blksize;
dpt->size = 0x1a;
dpt->infos = 0x02; // geometry is valid
dpt->cylinders = npc;
dpt->heads = nph;
dpt->spt = npspt;
dpt->blksize = blksize;
dpt->sector_count1 = lba; // FIXME should be Bit64
dpt->sector_count2 = 0;
}
/* Fill in EDD 2.x table. */
if (size >= 0x1e) {
uint8_t channel, irq, mode, checksum, i, translation;
uint16_t iobase1, iobase2, options;
dpt->size = 0x1e;
dpt->dpte_segment = ebda_seg;
dpt->dpte_offset = (uint16_t)&EbdaData->bdisk.dpte;
// Fill in dpte
channel = device / 2;
iobase1 = bios_dsk->channels[channel].iobase1;
iobase2 = bios_dsk->channels[channel].iobase2;
irq = bios_dsk->channels[channel].irq;
mode = bios_dsk->devices[device].mode;
translation = bios_dsk->devices[device].translation;
options = (translation == GEO_TRANSLATION_NONE ? 0 : 1 << 3); // chs translation
options |= (1 << 4); // lba translation
options |= (mode == ATA_MODE_PIO32 ? 1 : 0 << 7);
options |= (translation == GEO_TRANSLATION_LBA ? 1 : 0 << 9);
options |= (translation == GEO_TRANSLATION_RECHS ? 3 : 0 << 9);
bios_dsk->dpte.iobase1 = iobase1;
bios_dsk->dpte.iobase2 = iobase2;
bios_dsk->dpte.prefix = (0xe | (device % 2)) << 4;
bios_dsk->dpte.unused = 0xcb;
bios_dsk->dpte.irq = irq;
bios_dsk->dpte.blkcount = 1;
bios_dsk->dpte.dma = 0;
bios_dsk->dpte.pio = 0;
bios_dsk->dpte.options = options;
bios_dsk->dpte.reserved = 0;
bios_dsk->dpte.revision = 0x11;
checksum = 0;
for (i = 0; i < 15; ++i)
checksum += read_byte(ebda_seg, (uint16_t)&EbdaData->bdisk.dpte + i);
checksum = -checksum;
bios_dsk->dpte.checksum = checksum;
}
/* Fill in EDD 3.x table. */
if(size >= 0x42) {
uint8_t channel, iface, checksum, i;
uint16_t iobase1;
channel = device / 2;
iface = bios_dsk->channels[channel].iface;
iobase1 = bios_dsk->channels[channel].iobase1;
dpt->size = 0x42;
dpt->key = 0xbedd;
dpt->dpi_length = 0x24;
dpt->reserved1 = 0;
dpt->reserved2 = 0;
if (iface == ATA_IFACE_ISA) {
dpt->host_bus[0] = 'I';
dpt->host_bus[1] = 'S';
dpt->host_bus[2] = 'A';
dpt->host_bus[3] = ' ';
}
else {
// FIXME PCI
}
dpt->iface_type[0] = 'A';
dpt->iface_type[1] = 'T';
dpt->iface_type[2] = 'A';
dpt->iface_type[3] = ' ';
dpt->iface_type[4] = ' ';
dpt->iface_type[5] = ' ';
dpt->iface_type[6] = ' ';
dpt->iface_type[7] = ' ';
if (iface == ATA_IFACE_ISA) {
((uint16_t __far *)dpt->iface_path)[0] = iobase1;
((uint16_t __far *)dpt->iface_path)[1] = 0;
((uint32_t __far *)dpt->iface_path)[1] = 0;
}
else {
// FIXME PCI
}
((uint16_t __far *)dpt->device_path)[0] = device & 1; // device % 2; @todo: correct?
((uint16_t __far *)dpt->device_path)[1] = 0;
((uint32_t __far *)dpt->device_path)[1] = 0;
checksum = 0;
for (i = 30; i < 64; i++)
checksum += read_byte(DS, SI + i);
checksum = -checksum;
dpt->checksum = checksum;
}
goto int13x_success;
break;
case 0x4e: // // IBM/MS set hardware configuration
// DMA, prefetch, PIO maximum not supported
switch (GET_AL()) {
case 0x01:
case 0x03:
case 0x04:
case 0x06:
goto int13x_success;
break;
default :
goto int13x_fail;
}
break;
case 0x50: // IBM/MS send packet command
default:
BX_INFO("%s: function %02xh unsupported, returns fail\n", __func__, GET_AH());
goto int13x_fail;
break;
}
int13x_fail:
SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
int13x_fail_noah:
SET_DISK_RET_STATUS(GET_AH());
SET_CF(); // error occurred
return;
int13x_success:
SET_AH(0x00); // no error
int13x_success_noah:
SET_DISK_RET_STATUS(0x00);
CLEAR_CF(); // no error
return;
}