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ide.cpp
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <stdbool.h>
#include <fcntl.h>
#include <time.h>
#include <ios>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
#include <sys/stat.h>
#include "support/x86/x86.h"
#include "support/vhd/vhdcfg.h"
#include "support/minimig/minimig_hdd.h"
#include "support/minimig/minimig_config.h"
#include "spi.h"
#include "user_io.h"
#include "file_io.h"
#include "hardware.h"
#include "ide.h"
#if 0
#define dbg_printf printf
#define dbg_print_regs ide_print_regs
#define dbg_hexdump hexdump
#else
#define dbg_printf(...) void()
#define dbg_print_regs void
#define dbg_hexdump(...) void()
#endif
#if 0
#define dbg2_printf printf
#else
#define dbg2_printf(...) void()
#endif
#define IDE0_BASE 0xF000
#define IDE1_BASE 0xF100
#define ide_send_data(databuf, size) ide_sendbuf(ide, 255, (size), (uint16_t*)(databuf))
#define ide_recv_data(databuf, size) ide_recvbuf(ide, 255, (size), (uint16_t*)(databuf))
#define SWAP(a) ((((a)&0x000000ff)<<24)|(((a)&0x0000ff00)<<8)|(((a)&0x00ff0000)>>8)|(((a)&0xff000000)>>24))
void ide_reg_set(ide_config *ide, uint16_t reg, uint16_t value)
{
EnableIO();
spi8(UIO_DMA_WRITE);
spi32_w(ide->base + reg);
spi_w(value);
DisableIO();
}
void ide_sendbuf(ide_config *ide, uint16_t reg, uint32_t length, uint16_t *data)
{
EnableIO();
fpga_spi_fast(UIO_DMA_WRITE);
fpga_spi_fast(ide->base + reg);
fpga_spi_fast(0);
fpga_spi_fast_block_write(data, length);
DisableIO();
}
void ide_recvbuf(ide_config *ide, uint16_t reg, uint32_t length, uint16_t *data)
{
EnableIO();
fpga_spi_fast(UIO_DMA_READ);
fpga_spi_fast(ide->base + reg);
fpga_spi_fast(0);
fpga_spi_fast_block_read(data, length);
DisableIO();
}
const uint32_t ide_io_max_size = 32;
uint8_t ide_buf[ide_io_max_size * 512];
ide_config ide_inst[2] = {};
uint16_t ide_check()
{
uint16_t res;
EnableIO();
res = spi_w(UIO_DMA_SDIO);
if (!res) res = (uint8_t)spi_w(0);
DisableIO();
return res;
}
int ide_img_mount(fileTYPE *f, const char *name, int rw)
{
FileClose(f);
int writable = 0, ret = 0;
int len = strlen(name);
if (len)
{
const char *ext = name + len - 4;
if (!strncasecmp(".chd", ext, 4))
{
ret = 1;
}
else {
writable = rw && FileCanWrite(name);
ret = FileOpenEx(f, name, writable ? (O_RDWR | O_SYNC) : O_RDONLY);
if (!ret) printf("Failed to open file %s\n", name);
else strcpy(f->path, name);
}
}
if (!ret)
{
f->size = 0;
return 0;
}
printf("Mount %s as %s\n", name, writable ? "read-write" : "read-only");
return 1;
}
void ide_print_regs(regs_t *regs)
{
printf("\nIDE regs:\n");
printf(" io_done: %02X\n", regs->io_done);
printf(" features: %02X\n", regs->features);
printf(" sec_cnt: %02X\n", regs->sector_count);
printf(" sector: %02X\n", regs->sector);
printf(" cylinder: %04X\n", regs->cylinder);
printf(" head: %02X\n", regs->head);
printf(" drv: %02X\n", regs->drv);
printf(" lba: %02X\n", regs->lba);
printf(" command: %02X\n", regs->cmd);
}
void ide_get_regs(ide_config *ide)
{
uint32_t data[3];
ide_recvbuf(ide, 0, 6, (uint16_t*)data);
ide->regs.io_done = (uint8_t)(data[0] & 1);
ide->regs.io_fast = (uint8_t)(data[0] & 2);
ide->regs.features = (uint8_t)(data[0] >> 8);
ide->regs.sector_count = (uint8_t)(data[0] >> 16);
ide->regs.sector = (uint8_t)(data[0] >> 24);
ide->regs.cylinder = data[1] & 0xFFFF;
ide->regs.head = (data[2] >> 16) & 0xF;
ide->regs.drv = (data[2] >> 20) & 1;
ide->regs.lba = (data[2] >> 22) & 1;
ide->regs.cmd = data[2] >> 24;
ide->regs.error = 0;
ide->regs.status = 0;
dbg_print_regs(&ide->regs);
}
void ide_set_regs(ide_config *ide)
{
if (!(ide->regs.status & (ATA_STATUS_BSY | ATA_STATUS_ERR))) ide->regs.status |= ATA_STATUS_DSC;
uint8_t data[12] =
{
(uint8_t)((ide->drive[ide->regs.drv].cd) ? 0x80 : ide->regs.io_size),
(uint8_t)(ide->regs.error),
(uint8_t)(ide->regs.sector_count),
(uint8_t)(ide->regs.sector),
(uint8_t)(ide->regs.cylinder),
(uint8_t)(ide->regs.cylinder >> 8),
(uint8_t)(ide->regs.cylinder >> 16),
(uint8_t)(ide->regs.cylinder >> 24),
(uint8_t)(ide->drive[ide->regs.drv].cd ? ide->regs.pkt_io_size : 0),
(uint8_t)(ide->drive[ide->regs.drv].cd ? ide->regs.pkt_io_size >> 8 : 0),
(uint8_t)((ide->regs.lba ? 0xE0 : 0xA0) | (ide->regs.drv ? 0x10 : 0x00) | ide->regs.head),
(uint8_t)(ide->regs.status)
};
//hexdump(data, 12, ide->base);
ide_sendbuf(ide, 0, 6, (uint16_t*)data);
}
static void calc_geometry(chs_t *chs, uint64_t size)
{
uint32_t head = 0, cyl = 0, spt = 0;
uint32_t sptt[] = { 63, 127, 255, 0 };
uint32_t total = size / 512;
for (int i = 0; sptt[i] != 0; i++)
{
spt = sptt[i];
for (head = 4; head <= 16; head++)
{
cyl = total / (head * spt);
if (total <= 1024 * 1024)
{
if (cyl <= 1023) break;
}
else
{
if (cyl < 16383) break;
if (cyl < 32767 && head >= 5) break;
if (cyl <= 65536) break;
}
}
if (head <= 16) break;
}
chs->cylinders = cyl;
chs->heads = (uint16_t)head;
chs->sectors = (uint16_t)spt;
}
static void get_rdb_geometry(RigidDiskBlock *rdb, chs_t *chs, uint64_t size)
{
chs->heads = SWAP(rdb->rdb_Heads);
chs->sectors = SWAP(rdb->rdb_Sectors);
chs->cylinders = SWAP(rdb->rdb_Cylinders);
if (chs->sectors > 255 || chs->heads > 16)
{
printf("ATTN: Illegal CHS value(s).");
if (!(chs->sectors & 1) && (chs->sectors < 512) && (chs->heads <= 8))
{
printf(" Translate: sectors %d->%d, heads %d->%d.\n", chs->sectors, chs->sectors / 2, chs->heads, chs->heads * 2);
chs->sectors /= 2;
chs->heads *= 2;
return;
}
printf(" DANGEROUS: Cannot translate to legal CHS values. Re-calculate the CHS.\n");
calc_geometry(chs, size);
}
}
static void guess_geometry(fileTYPE *f, chs_t *chs, int allow_vrdb)
{
uint8_t flg = 0;
chs->offset = 0;
for (int i = 0; i < 16; ++i)
{
struct RigidDiskBlock *rdb = (struct RigidDiskBlock *)ide_buf;
if (!FileReadSec(f, ide_buf)) break;
for (int i = 0; i < 512; i++) flg |= ide_buf[i];
if (rdb->rdb_ID == RDB_MAGIC)
{
printf("Found RDB header -> native Amiga image.\n");
get_rdb_geometry(rdb, chs, f->size);
return;
}
}
if (allow_vrdb && flg)
{
chs->heads = 16;
chs->sectors = 128;
for (int i = 32; i <= 2048; i <<= 1)
{
int cylinders = f->size / (512 * i) + 1;
if (cylinders < 65536)
{
chs->sectors = (i < 128) ? i : 128;
chs->heads = i / chs->sectors;
break;
}
}
int spc = chs->heads * chs->sectors;
chs->cylinders = f->size / (512 * spc) + 1;
if (chs->cylinders > 65535) chs->cylinders = 65535;
chs->offset = -spc;
printf("No RDB header found in HDF image. Assume it's image of single partition. Use Virtual RDB header.\n");
}
else
{
calc_geometry(chs, f->size);
if(allow_vrdb) printf("No RDB header found. Possible non-Amiga or empty image.\n");
}
}
static void ide_set_geometry(drive_t *drive, uint16_t sectors, uint16_t heads)
{
int info = 0;
if (drive->heads != heads || drive->spt != sectors)
{
info = 1;
printf("SPT=%d, Heads=%d\n", sectors, heads);
}
drive->heads = heads ? heads : 16;
drive->spt = sectors ? sectors : 256;
uint32_t cylinders = drive->f->size / (drive->heads * drive->spt * 512);
if (drive->offset)
{
cylinders++;
drive->offset = drive->heads * drive->spt;
}
if (cylinders > 65535) cylinders = 65535;
//Maximum 137GB images are supported.
drive->cylinders = cylinders;
if(info) printf("New SPT=%d, Heads=%d, Cylinders=%d\n", drive->spt, drive->heads, drive->cylinders);
}
static uint32_t checksum_rdb(uint32_t *p, int set)
{
uint32_t count = SWAP(p[1]);
uint32_t result = 0;
if (set) p[2] = 0;
for (uint32_t i = 0; i < count; ++i) result += SWAP(p[i]);
if (!set) return result;
result = 0 - result;
p[2] = SWAP(result);
return 0;
}
static void fill_fake_rdb(drive_t *drive, uint32_t sector, int cnt)
{
printf("fill_fake_rdb(%u,%d)\n", sector, cnt);
uint8_t *buff = ide_buf;
memset(ide_buf, 0, sizeof(ide_buf));
while (cnt)
{
// if we're asked for LBA 0 we create an RDSK block, and if LBA 1, a PART block
if (sector == 0)
{
// RDB
struct RigidDiskBlock *rdb = (struct RigidDiskBlock *)buff;
rdb->rdb_ID = 'R' << 24 | 'D' << 16 | 'S' << 8 | 'K';
rdb->rdb_Summedlongs = 0x40;
rdb->rdb_HostID = 0x07;
rdb->rdb_BlockBytes = 0x200;
rdb->rdb_Flags = 0x12; // (Disk ID valid, no LUNs after this one)
rdb->rdb_BadBlockList = 0xffffffff; // We don't provide a bad block list
rdb->rdb_PartitionList = 1;
rdb->rdb_FileSysHeaderList = 0xffffffff;
rdb->rdb_DriveInit = 0xffffffff;
rdb->rdb_Reserved1[0] = 0xffffffff;
rdb->rdb_Reserved1[1] = 0xffffffff;
rdb->rdb_Reserved1[2] = 0xffffffff;
rdb->rdb_Reserved1[3] = 0xffffffff;
rdb->rdb_Reserved1[4] = 0xffffffff;
rdb->rdb_Reserved1[5] = 0xffffffff;
rdb->rdb_Cylinders = drive->cylinders;
rdb->rdb_Sectors = drive->spt;
rdb->rdb_Heads = drive->heads;
rdb->rdb_Interleave = 1;
rdb->rdb_Park = rdb->rdb_Cylinders;
rdb->rdb_WritePreComp = rdb->rdb_Cylinders;
rdb->rdb_ReducedWrite = rdb->rdb_Cylinders;
rdb->rdb_StepRate = 3;
rdb->rdb_RDBBlocksLo = 0;
rdb->rdb_RDBBlocksHi = 1;
rdb->rdb_LoCylinder = 1;
rdb->rdb_HiCylinder = rdb->rdb_Cylinders - 1;
rdb->rdb_CylBlocks = rdb->rdb_Heads * rdb->rdb_Sectors;
rdb->rdb_AutoParkSeconds = 0;
rdb->rdb_HighRDSKBlock = 1;
strcpy(rdb->rdb_DiskVendor, "DON'T REPARTITION! 0.00");
uint32_t *p = (uint32_t*)buff;
for (int i = 0; i < 40; i++) p[i] = SWAP(p[i]);
}
else if(sector == 1)
{
// Partition
struct PartitionBlock *pb = (struct PartitionBlock *)buff;
pb->pb_ID = 'P' << 24 | 'A' << 16 | 'R' << 8 | 'T';
pb->pb_Summedlongs = 0x40;
pb->pb_HostID = 0x07;
pb->pb_Next = 0xffffffff;
pb->pb_Flags = 0x1; // bootable
pb->pb_DevFlags = 0;
strcpy(pb->pb_DriveName, "0HD\003"); // "DHx" BCPL string
pb->pb_DriveName[0] = drive->drvnum + '0';
pb->pb_Environment.de_TableSize = 0x10;
pb->pb_Environment.de_SizeBlock = 0x80;
pb->pb_Environment.de_Surfaces = drive->heads;
pb->pb_Environment.de_SectorPerBlock = 1;
pb->pb_Environment.de_BlocksPerTrack = drive->spt;
pb->pb_Environment.de_Reserved = 2;
pb->pb_Environment.de_LowCyl = 1;
pb->pb_Environment.de_HighCyl = drive->cylinders - 1;
pb->pb_Environment.de_NumBuffers = 30;
pb->pb_Environment.de_MaxTransfer = 0xffffff;
pb->pb_Environment.de_Mask = 0x7ffffffe;
pb->pb_Environment.de_DosType = 0x444f5301;
uint32_t *p = (uint32_t*)buff;
for (int i = 0; i < 64; i++) p[i] = SWAP(p[i]);
}
else
{
break;
}
checksum_rdb((uint32_t*)buff, 1);
//hexdump(buff, 256);
cnt--;
sector++;
buff += 512;
}
}
void ide_img_set(uint32_t drvnum, fileTYPE *f, int cd, int sectors, int heads, int offset, int type)
{
int drv = (drvnum & 1);
int port = (drvnum >> 1);
drive_t *drive = &ide_inst[port].drive[drv];
ide_inst[port].base = port ? IDE1_BASE : IDE0_BASE;
ide_inst[port].drive[drv].drvnum = drvnum;
if (drive->f && (f != drive->f) && drive->f->opened())
{
FileClose(drive->f);
}
drive->f = f;
drive->cylinders = 0;
drive->heads = 0;
drive->spt = 0;
drive->spb = 16;
drive->offset = 0;
drive->type = 0;
drive->present = f ? 1 : 0;
ide_inst[port].state = IDE_STATE_RESET;
ide_inst[port].bitoff = port * 3;
drive->cd = drive->present && cd;
if (f && drive->placeholder && !drive->cd)
{
printf("Cannot hot-mount HDD image to CD!\n");
FileClose(drive->f);
drive->f = 0;
f = 0;
drive->present = 0;
}
drive->placeholder = drive->allow_placeholder;
if (drive->placeholder && drive->present && !drive->cd) drive->placeholder = 0;
if (drive->placeholder) drive->cd = 1;
ide_reg_set(&ide_inst[port], 6, ((drive->present || drive->placeholder) ? 9 : 8) << (drv * 4));
ide_reg_set(&ide_inst[port], 6, 0x200);
if(drive->f)
{
if (!drive->chd_f) drive->total_sectors = (drive->f->size / 512);
}
else
{
drive->total_sectors = 0;
}
if (!drive->cd)
{
if (drive->present)
{
if (!drive->chd_f)
{
if (parse_vhd_config(drive)) ide_set_geometry(drive, sectors, heads);
else ide_set_geometry(drive, drive->spt, drive->heads);
}
else ide_set_geometry(drive, sectors, heads);
if (offset && drive->cylinders < 65535) drive->cylinders++;
drive->offset = offset;
drive->type = type;
}
uint16_t identify[256] =
{
0x0040, //word 0
drive->cylinders, //word 1
0x0000, //word 2 reserved
drive->heads, //word 3
0x0000, //word 4 obsolete
0x0000, //word 5 obsolete
drive->spt, //word 6
0x0000, //word 7 vendor specific
0x0000, //word 8 vendor specific
0x0000, //word 9 vendor specific
('A' << 8) | 'O', //word 10
('H' << 8) | 'D', //word 11
('0' << 8) | '0', //word 12
('0' << 8) | '0', //word 13
('0' << 8) | ' ', //word 14
(' ' << 8) | ' ', //word 15
(' ' << 8) | ' ', //word 16
(' ' << 8) | ' ', //word 17
(' ' << 8) | ' ', //word 18
(' ' << 8) | ' ', //word 19
3, //word 20 buffer type
512, //word 21 cache size
4, //word 22 number of ecc bytes
0,0,0,0, //words 23..26 firmware revision
(' ' << 8) | ' ', //words 27..46 model number
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
0x8020, //word 47 max multiple sectors
1, //word 48 dword io
1 << 9, //word 49 lba supported
0x4001, //word 50 reserved
0x0200, //word 51 pio timing
0x0200, //word 52 pio timing
0x0007, //word 53 valid fields
drive->cylinders, //word 54
drive->heads, //word 55
drive->spt, //word 56
(uint16_t)(drive->total_sectors & 0xFFFF), //word 57
(uint16_t)(drive->total_sectors >> 16), //word 58
0x110, //word 59 multiple sectors
(uint16_t)(drive->total_sectors & 0xFFFF), //word 60 LBA-28
(uint16_t)(drive->total_sectors >> 16), //word 61 LBA-28
0x0000, //word 62 single word dma modes
0x0000, //word 63 multiple word dma modes
0x0000, //word 64 pio modes
120,120,120,120, //word 65..68
0,0,0,0,0,0,0,0,0,0,0, //word 69..79
0x007E, //word 80 ata modes
0x0000, //word 81 minor version number
(1 << 14) | (1 << 9), //word 82 supported commands
(1 << 14) | (1 << 13) | (1 << 12), //word 83
1 << 14, //word 84
(1 << 14) | (1 << 9), //word 85
(1 << 14) | (1 << 13) | (1 << 12), //word 86
1 << 14, //word 87
0x0000, //word 88
0,0,0,0, //word 89..92
(1 << 14) | (1 << 13) | (1 << 9) | (1 << 8) | (1 << 3) | (1 << 1) | (1 << 0), //word 93
0,0,0,0,0,0, //word 94..99
(uint16_t)(drive->total_sectors & 0xFFFF), //word 100 LBA-48
(uint16_t)(drive->total_sectors >> 16), //word 101 LBA-48
0, //word 102 LBA-48
0, //word 103 LBA-48
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //word 104..127
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //word 128..255
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
for (int i = 0; i < 256; i++) drive->id[i] = identify[i];
}
else
{
uint16_t identify[256] =
{
0x8580, //word 0
0x0000, //word 1
0x0000, //word 2 reserved
0x0000, //word 3
0x0000, //word 4
0x0000, //word 5
0x0000, //word 6
0x0000, //word 7 vendor specific
0x0000, //word 8 vendor specific
0x0000, //word 9 vendor specific
('A' << 8) | 'O', //word 10
('C' << 8) | 'D', //word 11
('0' << 8) | '0', //word 12
('0' << 8) | '0', //word 13
('0' << 8) | ' ', //word 14
(' ' << 8) | ' ', //word 15
(' ' << 8) | ' ', //word 16
(' ' << 8) | ' ', //word 17
(' ' << 8) | ' ', //word 18
(' ' << 8) | ' ', //word 19
0x0000, //word 20 buffer type
0x0000, //word 21 cache size
0x0000, //word 22 number of ecc bytes
0,0,0,0, //words 23..26 firmware revision
(' ' << 8) | ' ', //words 27..46 model number
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
(' ' << 8) | ' ',
0x0000, //word 47
0x0000, //word 48
1 << 9, //word 49 lba supported
0x0000, //word 50
0x0000, //word 51
0x0000, //word 52
0x0007, //word 53 valid fields
0x0000, //word 54
0x0000, //word 55
0x0000, //word 56
0x0000, //word 57
0x0000, //word 58
0x0000, //word 59
0x0000, //word 60
0x0000, //word 61
0x0000, //word 62
0x0000, //word 63 multiple word dma modes
0x0000, //word 64 pio modes
120,120,120,120, //word 65..68
0,0,0,0,0,0,0,0,0,0,0, //word 69..79
0x007E, //word 80 ata modes
0x0000, //word 81 minor version number
(1 << 9) | (1 << 4), //word 82 supported commands
(1 << 14), //word 83
1 << 14, //word 84
(1 << 14) | (1 << 9) | (1 << 4), //word 85
0, //word 86
1 << 14, //word 87
0x0000, //word 88
0,0,0,0, //word 89..92
1 | (1 << 14) | (1 << 13) | (1 << 9) | (1 << 8) | (1 << 3) | (1 << 1) | (1 << 0), //word 93
0,0,0,0,0,0, //word 94..99
0x0000, //word 100
0x0000, //word 101
0x0000, //word 102
0x0000, //word 103
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //word 104..127
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //word 128..255
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
for (int i = 0; i < 256; i++) drive->id[i] = identify[i];
drive->load_state = (drive->f || drive->chd_f) ? 1 : 3;
}
if (ide_inst[port].drive[drv].present)
{
char *name = ide_inst[port].drive[drv].f->name;
for (int i = 0; i < 20; i++)
{
if (*name) drive->id[27 + i] = ((*name++) << 8) | 0x20;
if (*name) drive->id[27 + i] = (drive->id[27 + i] & 0xFF00) | (*name++);
}
//hexdump(drive->id, 256);
}
printf("HDD%d:\n present %d\n hd_cylinders %d\n hd_heads %d\n hd_spt %d\n hd_total_sectors %d\n\n",
drvnum, drive->present, drive->cylinders, drive->heads, drive->spt, drive->total_sectors);
}
static uint32_t get_lba(ide_config *ide)
{
uint32_t lba;
if (ide->regs.lba)
{
lba = ide->regs.sector | (ide->regs.cylinder << 8) | (ide->regs.head << 24);
}
else
{
drive_t *drive = &ide->drive[ide->regs.drv];
dbg2_printf(" CHS: %d/%d/%d (%d/%d)\n", ide->regs.cylinder, ide->regs.head, ide->regs.sector, drive->heads, drive->spt);
lba = ide->regs.cylinder;
lba *= drive->heads;
lba += ide->regs.head;
lba *= drive->spt;
lba += ide->regs.sector - 1;
}
dbg2_printf(" LBA: %u\n", lba);
return lba;
}
static void put_lba(ide_config *ide, uint32_t lba)
{
lba--;
dbg2_printf(" putLBA: %u\n", lba);
if (ide->regs.lba)
{
ide->regs.sector = lba;
lba >>= 8;
ide->regs.cylinder = lba;
lba >>= 16;
ide->regs.head = lba & 0xF;
}
else
{
drive_t *drive = &ide->drive[ide->regs.drv];
uint32_t hspt = drive->heads * drive->spt;
ide->regs.cylinder = lba / hspt;
lba = lba % hspt;
ide->regs.head = lba / drive->spt;
lba = lba % drive->spt;
ide->regs.sector = lba + 1;
}
}
inline uint16_t get_cnt(ide_config *ide)
{
drive_t *drive = &ide->drive[ide->regs.drv];
dbg2_printf(" Cnt: %d (max = %d)\n", ide->regs.sector_count, drive->spb);
uint16_t cnt = ide->regs.sector_count;
if (!cnt || cnt > drive->spb)
{
cnt = drive->spb;
dbg2_printf(" New cnt: %d\n", cnt);
}
return cnt;
}
inline int readhdd(drive_t *drive, uint32_t lba, int cnt)
{
if (lba < drive->offset)
{
if (!drive->type) fill_fake_rdb(drive, lba, cnt);
else memset(ide_buf, 0, sizeof(ide_buf));
return 1;
}
else
{
return FileReadAdv(drive->f, ide_buf, cnt * 512, -1);
}
}
static void process_read(ide_config *ide, int multi)
{
uint32_t lba = get_lba(ide);
uint16_t ide_req = 0;
dbg2_printf(" sector_count: %d\n", ide->regs.sector_count);
uint32_t cnt = multi ? get_cnt(ide) : 1;
ide->null = !FileSeekLBA(ide->drive[ide->regs.drv].f, (lba <= ide->drive[ide->regs.drv].offset) ? 0 : (lba - ide->drive[ide->regs.drv].offset));
if (!ide->null) ide->null = (readhdd(&ide->drive[ide->regs.drv], lba, cnt) <= 0);
if (ide->null) memset(ide_buf, 0, cnt * 512);
while (1)
{
lba += cnt;
ide->regs.sector_count -= cnt;
put_lba(ide, lba);
ide->regs.io_size = cnt;
ide->regs.status = ATA_STATUS_RDP | ATA_STATUS_RDY | ATA_STATUS_DRQ | ATA_STATUS_IRQ;
if (!ide->regs.sector_count) ide->regs.status |= ATA_STATUS_END;
if (ide->regs.io_fast)
{
ide_set_regs(ide);
ide_send_data(ide_buf, cnt * 256);
}
else
{
ide_send_data(ide_buf, cnt * 256);
ide->regs.status &= ~ATA_STATUS_RDP;
ide_set_regs(ide);
}
if (!ide->regs.sector_count)
{
//ATA_STATUS_END will set ATA_STATUS_RDY at the end
ide->state = IDE_STATE_IDLE;
break;
}
cnt = multi ? get_cnt(ide) : 1;
if (!ide->null) ide->null = (readhdd(&ide->drive[ide->regs.drv], lba, cnt) <= 0);
if (ide->null) memset(ide_buf, 0, cnt * 512);
ide_req = 0;
while (!ide_req) ide_req = (ide_check() >> ide->bitoff) & 7;
if (ide_req != 5)
{
ide->state = IDE_STATE_IDLE;
break;
}
}
dbg2_printf(" finish\n");
}
static void process_write(ide_config *ide, int multi)
{
uint32_t lba = get_lba(ide);
uint32_t cnt = 1;
uint16_t ide_req;
ide->null = (ide->regs.cmd != 0xFA) ? !FileSeekLBA(ide->drive[ide->regs.drv].f, (lba <= ide->drive[ide->regs.drv].offset) ? 0 : (lba - ide->drive[ide->regs.drv].offset)) : 1;
uint8_t irq = 0;
while (1)
{
cnt = multi ? get_cnt(ide) : 1;
ide->regs.status = ATA_STATUS_RDY | ATA_STATUS_DRQ | irq;
irq = ATA_STATUS_IRQ;
ide->regs.io_size = cnt;
ide_set_regs(ide);
ide_req = 0;
while (!ide_req) ide_req = (ide_check() >> ide->bitoff) & 7;
if (ide_req != 5)
{
ide->state = IDE_STATE_IDLE;
break;
}
ide_recv_data(ide_buf, cnt * 256);
if (ide->regs.cmd == 0xFA)
{
ide->regs.sector_count = 0;
char* filename = user_io_make_filepath(HomeDir(), (char*)ide_buf);
int drvnum = (ide->regs.head == 1) ? 0 : (ide->regs.head == 2) ? 1 : (ide->drive[ide->regs.drv].drvnum + 2);
static const char* names[6] = { "fdd0", "fdd1", "ide00", "ide01", "ide10", "ide11" };
printf("Request for new image for drive %s: %s\n", names[drvnum], filename);
if(is_x86()) x86_set_image(drvnum, filename);
}
else
{
if (!ide->null) ide->null = (lba < ide->drive[ide->regs.drv].offset) ? 0 : (FileWriteAdv(ide->drive[ide->regs.drv].f, ide_buf, cnt * 512, -1) <= 0);
lba += cnt;
ide->regs.sector_count -= cnt;
put_lba(ide, lba);
}
if (!ide->regs.sector_count)
{
ide->state = IDE_STATE_IDLE;
ide->regs.status = ATA_STATUS_RDY | ATA_STATUS_IRQ;
ide_set_regs(ide);
break;
}
}
}
static int handle_hdd(ide_config *ide)
{
switch (ide->regs.cmd)
{
case 0xEC: // identify
{
uint8_t drv = ide->regs.drv;
memset(&ide->regs, 0, sizeof(ide->regs));
ide->regs.drv = drv;
}
ide->regs.io_size = 1;
ide->regs.status = ATA_STATUS_RDY | ATA_STATUS_DRQ | ATA_STATUS_IRQ | ATA_STATUS_END;
ide_send_data(ide->drive[ide->regs.drv].id, 256);
ide_set_regs(ide);
break;
case 0xC4: // read multiple
process_read(ide, 1);
break;
case 0x20: // read with retry
case 0x21: // read
process_read(ide, 0);
break;
case 0xC5: // write multiple
process_write(ide, 1);
break;
case 0x30: // write with retry
case 0x31: // write
process_write(ide, 0);
break;
case 0xFA: // mount image
ide->regs.pkt_io_size = 256;
process_write(ide, 0);
break;
case 0xC6: // set multople
if (ide->regs.sector_count > ide_io_max_size)
{
return 1;
}
ide->drive[ide->regs.drv].spb = ide->regs.sector_count;
dbg_printf("New block size: %d\n", ide->drive[ide->regs.drv].spb);
ide->regs.status = ATA_STATUS_RDY | ATA_STATUS_IRQ;
ide_set_regs(ide);
break;
case 0x08: // reset (fail)
dbg_printf("Reset command (08h) for HDD not supported\n");
return 1;
case 0x10 ... 0x1F: // recalibrate
ide->regs.status = ATA_STATUS_RDY | ATA_STATUS_IRQ;
ide->regs.cylinder = 0;
ide_set_regs(ide);
break;
case 0x40: // READ VERIFY
dbg_printf("Received read verify command. Not implemented but returning OK.\n");
ide->regs.status = ATA_STATUS_RDY | ATA_STATUS_IRQ;
ide_set_regs(ide);
break;
case 0x91: // initialize device parameters
ide_set_geometry(&ide->drive[ide->regs.drv], ide->regs.sector_count, ide->regs.head + 1);
ide->regs.status = ATA_STATUS_RDY | ATA_STATUS_IRQ;
ide_set_regs(ide);
break;
default:
dbg_printf("(!) Unsupported command (%04X)\n", ide->base);
dbg_print_regs(&ide->regs);
return 1;
}
return 0;
}
void ide_io(int num, int req)
{
ide_config *ide = &ide_inst[num];
//printf("req: %d, disk: %d\n", req, num);
if (req == 0) // no request
{
if (ide->state == IDE_STATE_RESET)
{
ide->state = IDE_STATE_IDLE;
ide->regs.status = ATA_STATUS_RDY;
ide_set_regs(ide);
dbg_printf("IDE %04X reset finish\n", ide->base);
}
}
else if (req == 4) // command
{
ide->state = IDE_STATE_IDLE;
ide_get_regs(ide);
dbg2_printf("IDE command: %02X (on %d)\n", ide->regs.cmd, ide->regs.drv);
int err = 0;
if(ide->regs.cmd == 0xFA) err = handle_hdd(ide);
else if (ide->drive[ide->regs.drv].cd) err = cdrom_handle_cmd(ide);
else if (!ide->drive[ide->regs.drv].present) err = 1;
else err = handle_hdd(ide);
if (err)
{
ide->regs.status = ATA_STATUS_RDY | ATA_STATUS_ERR | ATA_STATUS_IRQ;
ide->regs.error = ATA_ERR_ABRT;
ide_set_regs(ide);
}