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hardfile.cpp
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hardfile.cpp
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/*
* UAE - The Un*x Amiga Emulator
*
* Hardfile emulation
*
* Copyright 1995 Bernd Schmidt
* 2002 Toni Wilen (scsi emulation, 64-bit support)
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include "threaddep/thread.h"
#include "options.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "disk.h"
#include "autoconf.h"
#include "traps.h"
#include "filesys.h"
#include "execlib.h"
#include "native2amiga.h"
#include "gui.h"
#include "uae.h"
#include "scsi.h"
#include "gayle.h"
#include "execio.h"
#include "zfile.h"
#undef DEBUGME
#define hf_log
#define hf_log2
#define scsi_log
#define hf_log3
//#define DEBUGME
#ifdef DEBUGME
#undef hf_log
#define hf_log write_log
#undef hf_log2
#define hf_log2 write_log
#undef hf_log3
#define hf_log3 write_log
#undef scsi_log
#define scsi_log write_log
#endif
#define MAX_ASYNC_REQUESTS 50
#define ASYNC_REQUEST_NONE 0
#define ASYNC_REQUEST_TEMP 1
#define ASYNC_REQUEST_CHANGEINT 10
struct hardfileprivdata {
volatile uaecptr d_request[MAX_ASYNC_REQUESTS];
volatile int d_request_type[MAX_ASYNC_REQUESTS];
volatile uae_u32 d_request_data[MAX_ASYNC_REQUESTS];
smp_comm_pipe requests;
int thread_running;
uae_sem_t sync_sem;
uaecptr base;
int changenum;
uaecptr changeint;
};
#define VHD_DYNAMIC 3
#define VHD_FIXED 2
STATIC_INLINE uae_u32 gl (uae_u8 *p)
{
return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
}
static uae_sem_t change_sem;
static struct hardfileprivdata hardfpd[MAX_FILESYSTEM_UNITS];
static uae_u32 nscmd_cmd;
static void wl (uae_u8 *p, int v)
{
p[0] = v >> 24;
p[1] = v >> 16;
p[2] = v >> 8;
p[3] = v;
}
static void ww (uae_u8 *p, int v)
{
p[0] = v >> 8;
p[1] = v;
}
static int rl (uae_u8 *p)
{
return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | (p[3]);
}
static void getchs2 (struct hardfiledata *hfd, int *cyl, int *cylsec, int *head, int *tracksec)
{
unsigned int total = (unsigned int)(hfd->virtsize / 1024);
int heads;
int sectors = 63;
/* do we have RDB values? */
if (hfd->cylinders) {
*cyl = hfd->cylinders;
*tracksec = hfd->sectors;
*head = hfd->heads;
*cylsec = hfd->sectors * hfd->heads;
return;
}
/* what about HDF settings? */
if (hfd->surfaces && hfd->secspertrack) {
*head = hfd->surfaces;
*tracksec = hfd->secspertrack;
*cylsec = (*head) * (*tracksec);
*cyl = (unsigned int)(hfd->virtsize / hfd->blocksize) / ((*tracksec) * (*head));
return;
}
/* no, lets guess something.. */
if (total <= 504 * 1024)
heads = 16;
else if (total <= 1008 * 1024)
heads = 32;
else if (total <= 2016 * 1024)
heads = 64;
else if (total <= 4032 * 1024)
heads = 128;
else
heads = 255;
*cyl = (unsigned int)(hfd->virtsize / hfd->blocksize) / (sectors * heads);
*cylsec = sectors * heads;
*tracksec = sectors;
*head = heads;
}
static void getchs (struct hardfiledata *hfd, int *cyl, int *cylsec, int *head, int *tracksec)
{
getchs2 (hfd, cyl, cylsec, head, tracksec);
hf_log (L"CHS: %08X-%08X %d %d %d %d %d\n",
(uae_u32)(hfd->virtsize >> 32),(uae_u32)hfd->virtsize,
*cyl, *cylsec, *head, *tracksec);
}
void getchsgeometry (uae_u64 size, int *pcyl, int *phead, int *psectorspertrack)
{
int sptt[] = { 63, 127, 255, -1 };
int i, spt, head, cyl;
uae_u64 total = (unsigned int)(size / 512);
for (i = 0; sptt[i] >= 0; i++) {
spt = sptt[i];
for (head = 4; head <= 16;head++) {
cyl = total / (head * spt);
if (size <= 512 * 1024 * 1024) {
if (cyl <= 1023)
break;
} else {
if (cyl < 16383)
break;
if (cyl < 32767 && head >= 5)
break;
if (cyl <= 65535)
break;
}
}
if (head <= 16)
break;
}
*pcyl = cyl;
*phead = head;
*psectorspertrack = spt;
}
static void getchshd (struct hardfiledata *hfd, int *pcyl, int *phead, int *psectorspertrack)
{
uae_u64 total = hfd->virtsize / 512;
if (total > 16515072) {
/* >8G, CHS=16383/16/63 */
*pcyl = 16383;
*phead = 16;
*psectorspertrack = 63;
return;
}
getchsgeometry (hfd->virtsize, pcyl, phead, psectorspertrack);
}
static void pl (uae_u8 *p, int off, uae_u32 v)
{
p += off * 4;
p[0] = v >> 24;
p[1] = v >> 16;
p[2] = v >> 8;
p[3] = v >> 0;
}
static void rdb_crc (uae_u8 *p)
{
uae_u32 sum;
int i, blocksize;
sum =0;
blocksize = rl (p + 1 * 4);
for (i = 0; i < blocksize; i++)
sum += rl (p + i * 4);
sum = -sum;
pl (p, 2, sum);
}
static void create_virtual_rdb (struct hardfiledata *hfd, uae_u32 dostype, int bootpri, const TCHAR *filesys)
{
uae_u8 *rdb, *part, *denv;
int cyl = hfd->heads * hfd->secspertrack;
int cyls = 262144 / (cyl * 512);
int size = cyl * cyls * 512;
rdb = xcalloc (uae_u8, size);
hfd->virtual_rdb = rdb;
hfd->virtual_size = size;
part = rdb + 512;
pl(rdb, 0, 0x5244534b);
pl(rdb, 1, 64);
pl(rdb, 2, 0); // chksum
pl(rdb, 3, 0); // hostid
pl(rdb, 4, 512); // blockbytes
pl(rdb, 5, 0); // flags
pl(rdb, 6, -1); // badblock
pl(rdb, 7, 1); // part
pl(rdb, 8, -1); // fs
pl(rdb, 9, -1); // driveinit
pl(rdb, 10, -1); // reserved
pl(rdb, 11, -1); // reserved
pl(rdb, 12, -1); // reserved
pl(rdb, 13, -1); // reserved
pl(rdb, 14, -1); // reserved
pl(rdb, 15, -1); // reserved
pl(rdb, 16, hfd->nrcyls);
pl(rdb, 17, hfd->secspertrack);
pl(rdb, 18, hfd->heads);
pl(rdb, 19, 0); // interleave
pl(rdb, 20, 0); // park
pl(rdb, 21, -1); // res
pl(rdb, 22, -1); // res
pl(rdb, 23, -1); // res
pl(rdb, 24, 0); // writeprecomp
pl(rdb, 25, 0); // reducedwrite
pl(rdb, 26, 0); // steprate
pl(rdb, 27, -1); // res
pl(rdb, 28, -1); // res
pl(rdb, 29, -1); // res
pl(rdb, 30, -1); // res
pl(rdb, 31, -1); // res
pl(rdb, 32, 0); // rdbblockslo
pl(rdb, 33, cyl * cyls); // rdbblockshi
pl(rdb, 34, cyls); // locyl
pl(rdb, 35, hfd->nrcyls + cyls); // hicyl
pl(rdb, 36, cyl); // cylblocks
pl(rdb, 37, 0); // autopark
pl(rdb, 38, 2); // highrdskblock
pl(rdb, 39, -1); // res
ua_copy ((char*)rdb + 40 * 4, -1, hfd->vendor_id);
ua_copy ((char*)rdb + 42 * 4, -1, hfd->product_id);
ua_copy ((char*)rdb + 46 * 4, -1, L"UAE");
rdb_crc (rdb);
pl(part, 0, 0x50415254);
pl(part, 1, 64);
pl(part, 2, 0);
pl(part, 3, 0);
pl(part, 4, -1);
pl(part, 5, 1); // bootable
pl(part, 6, -1);
pl(part, 7, -1);
pl(part, 8, 0); // devflags
part[9 * 4] = _tcslen (hfd->device_name);
ua_copy ((char*)part + 9 * 4 + 1, -1, hfd->device_name);
denv = part + 128;
pl(denv, 0, 80);
pl(denv, 1, 512 / 4);
pl(denv, 2, 0); // secorg
pl(denv, 3, hfd->heads);
pl(denv, 4, hfd->blocksize / 512);
pl(denv, 5, hfd->secspertrack);
pl(denv, 6, hfd->reservedblocks);
pl(denv, 7, 0); // prealloc
pl(denv, 8, 0); // interleave
pl(denv, 9, cyls); // lowcyl
pl(denv, 10, hfd->nrcyls + cyls - 1);
pl(denv, 11, 50);
pl(denv, 12, 0);
pl(denv, 13, 0x00ffffff);
pl(denv, 14, 0x7ffffffe);
pl(denv, 15, bootpri);
pl(denv, 16, dostype);
rdb_crc (part);
hfd->virtsize += size;
}
void hdf_hd_close (struct hd_hardfiledata *hfd)
{
if (!hfd)
return;
hdf_close (&hfd->hfd);
xfree (hfd->path);
}
int hdf_hd_open (struct hd_hardfiledata *hfd, const TCHAR *path, int blocksize, int readonly,
const TCHAR *devname, int sectors, int surfaces, int reserved,
int bootpri, const TCHAR *filesys)
{
memset (hfd, 0, sizeof (struct hd_hardfiledata));
hfd->bootpri = bootpri;
hfd->hfd.blocksize = blocksize;
hfd->hfd.readonly = readonly;
if (!hdf_open (&hfd->hfd, path))
return 0;
hfd->path = my_strdup(path);
hfd->hfd.heads = surfaces;
hfd->hfd.reservedblocks = reserved;
hfd->hfd.secspertrack = sectors;
if (devname)
_tcscpy (hfd->hfd.device_name, devname);
getchshd (&hfd->hfd, &hfd->cyls, &hfd->heads, &hfd->secspertrack);
hfd->cyls_def = hfd->cyls;
hfd->secspertrack_def = hfd->secspertrack;
hfd->heads_def = hfd->heads;
if (hfd->hfd.heads && hfd->hfd.secspertrack) {
uae_u8 buf[512] = { 0 };
hdf_read (&hfd->hfd, buf, 0, 512);
if (buf[0] != 0 && memcmp (buf, L"RDSK", 4)) {
hfd->hfd.nrcyls = (hfd->hfd.virtsize / blocksize) / (sectors * surfaces);
create_virtual_rdb (&hfd->hfd, rl (buf), hfd->bootpri, filesys);
while (hfd->hfd.nrcyls * surfaces * sectors > hfd->cyls_def * hfd->secspertrack_def * hfd->heads_def) {
hfd->cyls_def++;
}
}
}
hfd->size = hfd->hfd.virtsize;
return 1;
}
static uae_u32 vhd_checksum (uae_u8 *p, int offset)
{
int i;
uae_u32 sum;
sum = 0;
for (i = 0; i < 512; i++) {
if (offset >= 0 && i >= offset && i < offset + 4)
continue;
sum += p[i];
}
return ~sum;
}
int hdf_open (struct hardfiledata *hfd, const TCHAR *pname)
{
uae_u8 tmp[512], tmp2[512];
uae_u32 v;
hfd->adide = 0;
hfd->byteswap = 0;
if (!hdf_open_target (hfd, pname))
return 0;
if (hdf_read_target (hfd, tmp, 0, 512) != 512)
goto nonvhd;
v = gl (tmp + 8); // features
if ((v & 3) != 2)
goto nonvhd;
v = gl (tmp + 8 + 4); // version
if ((v >> 16) != 1)
goto nonvhd;
hfd->vhd_type = gl (tmp + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 4 + 8 + 8 + 4);
if (hfd->vhd_type != VHD_FIXED && hfd->vhd_type != VHD_DYNAMIC)
goto nonvhd;
v = gl (tmp + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 4 + 8 + 8 + 4 + 4);
if (v == 0)
goto nonvhd;
if (vhd_checksum (tmp, 8 + 4 + 4 + 8 + 4 + 4 + 4 + 4 + 8 + 8 + 4 + 4) != v)
goto nonvhd;
if (hdf_read_target (hfd, tmp2, hfd->physsize - sizeof tmp2, 512) != 512)
goto end;
if (memcmp (tmp, tmp2, sizeof tmp))
goto nonvhd;
hfd->vhd_footerblock = hfd->physsize - 512;
hfd->virtsize = (uae_u64)(gl (tmp + 8 + 4 + 4 + 8 + 4 + 4 +4 + 4 + 8)) << 32;
hfd->virtsize |= gl (tmp + 8 + 4 + 4 + 8 + 4 + 4 +4 + 4 + 8 + 4);
if (hfd->vhd_type == VHD_DYNAMIC) {
uae_u32 size;
hfd->vhd_bamoffset = gl (tmp + 8 + 4 + 4 + 4);
if (hfd->vhd_bamoffset == 0 || hfd->vhd_bamoffset >= hfd->physsize)
goto end;
if (hdf_read_target (hfd, tmp, hfd->vhd_bamoffset, 512) != 512)
goto end;
v = gl (tmp + 8 + 8 + 8 + 4 + 4 + 4);
if (vhd_checksum (tmp, 8 + 8 + 8 + 4 + 4 + 4) != v)
goto end;
v = gl (tmp + 8 + 8 + 8);
if ((v >> 16) != 1)
goto end;
hfd->vhd_blocksize = gl (tmp + 8 + 8 + 8 + 4 + 4);
hfd->vhd_bamoffset = gl (tmp + 8 + 8 + 4);
hfd->vhd_bamsize = (((hfd->virtsize + hfd->vhd_blocksize - 1) / hfd->vhd_blocksize) * 4 + 511) & ~511;
size = hfd->vhd_bamoffset + hfd->vhd_bamsize;
hfd->vhd_header = xmalloc (uae_u8, size);
if (hdf_read_target (hfd, hfd->vhd_header, 0, size) != size)
goto end;
hfd->vhd_sectormap = xmalloc (uae_u8, 512);
hfd->vhd_sectormapblock = -1;
hfd->vhd_bitmapsize = ((hfd->vhd_blocksize / (8 * 512)) + 511) & ~511;
}
write_log (L"HDF is VHD %s image, virtual size=%dK\n",
hfd->vhd_type == 2 ? L"fixed" : L"dynamic",
hfd->virtsize / 1024);
return 1;
nonvhd:
hfd->vhd_type = 0;
return 1;
end:
hdf_close_target (hfd);
return 0;
}
void hdf_close (struct hardfiledata *hfd)
{
hdf_close_target (hfd);
hfd->vhd_type = 0;
xfree (hfd->vhd_header);
hfd->vhd_header = NULL;
xfree (hfd->vhd_sectormap);
hfd->vhd_sectormap = NULL;
}
int hdf_dup (struct hardfiledata *dhfd, const struct hardfiledata *shfd)
{
return hdf_dup_target (dhfd, shfd);
}
extern int get_guid_target (uae_u8 *out);
static uae_u64 vhd_read (struct hardfiledata *hfd, void *v, uae_u64 offset, uae_u64 len)
{
uae_u64 read;
uae_u8 *dataptr = (uae_u8*)v;
//write_log (L"%08x %08x\n", (uae_u32)offset, (uae_u32)len);
read = 0;
if (offset & 511)
return read;
if (len & 511)
return read;
while (len > 0) {
uae_u32 bamoffset = (offset / hfd->vhd_blocksize) * 4 + hfd->vhd_bamoffset;
uae_u32 sectoroffset = gl (hfd->vhd_header + bamoffset);
if (sectoroffset == 0xffffffff) {
memset (dataptr, 0, 512);
read += 512;
} else {
int bitmapoffsetbits;
int bitmapoffsetbytes;
uae_u64 sectormapblock;
bitmapoffsetbits = (offset / 512) % (hfd->vhd_blocksize / 512);
bitmapoffsetbytes = bitmapoffsetbits / 8;
sectormapblock = sectoroffset * (uae_u64)512 + (bitmapoffsetbytes & ~511);
if (hfd->vhd_sectormapblock != sectormapblock) {
// read sector bitmap
//write_log (L"BM %08x\n", sectormapblock);
if (hdf_read_target (hfd, hfd->vhd_sectormap, sectormapblock, 512) != 512) {
write_log (L"vhd_read: bitmap read error\n");
return read;
}
hfd->vhd_sectormapblock = sectormapblock;
}
// block allocated in bitmap?
if (hfd->vhd_sectormap[bitmapoffsetbytes & 511] & (1 << (7 - (bitmapoffsetbits & 7)))) {
// read data block
uae_u64 block = sectoroffset * (uae_u64)512 + hfd->vhd_bitmapsize + bitmapoffsetbits * 512;
//write_log (L"DB %08x\n", block);
if (hdf_read_target (hfd, dataptr, block, 512) != 512) {
write_log (L"vhd_read: data read error\n");
return read;
}
} else {
memset (dataptr, 0, 512);
}
read += 512;
}
len -= 512;
dataptr += 512;
offset += 512;
}
return read;
}
static int vhd_write_enlarge (struct hardfiledata *hfd, uae_u32 bamoffset)
{
uae_u8 *buf, *p;
int len;
uae_u32 block;
int v;
len = hfd->vhd_blocksize + hfd->vhd_bitmapsize + 512;
buf = xcalloc (uae_u8, len);
if (!hdf_resize_target (hfd, hfd->physsize + len - 512)) {
write_log (L"vhd_enlarge: failure\n");
return 0;
}
// add footer (same as 512 byte header)
memcpy (buf + len - 512, hfd->vhd_header, 512);
v = hdf_write_target (hfd, buf, hfd->vhd_footerblock, len);
xfree (buf);
if (v != len) {
write_log (L"vhd_enlarge: footer write error\n");
return 0;
}
// write new offset to BAM
p = hfd->vhd_header + bamoffset;
block = hfd->vhd_footerblock / 512;
p[0] = block >> 24;
p[1] = block >> 16;
p[2] = block >> 8;
p[3] = block >> 0;
// write to disk
if (hdf_write_target (hfd, hfd->vhd_header + hfd->vhd_bamoffset, hfd->vhd_bamoffset, hfd->vhd_bamsize) != hfd->vhd_bamsize) {
write_log (L"vhd_enlarge: bam write error\n");
return 0;
}
hfd->vhd_footerblock += len - 512;
return 1;
}
static uae_u64 vhd_write (struct hardfiledata *hfd, void *v, uae_u64 offset, uae_u64 len)
{
uae_u64 written;
uae_u8 *dataptr = (uae_u8*)v;
//write_log (L"%08x %08x\n", (uae_u32)offset, (uae_u32)len);
written = 0;
if (offset & 511)
return written;
if (len & 511)
return written;
while (len > 0) {
uae_u32 bamoffset = (offset / hfd->vhd_blocksize) * 4 + hfd->vhd_bamoffset;
uae_u32 sectoroffset = gl (hfd->vhd_header + bamoffset);
if (sectoroffset == 0xffffffff) {
if (!vhd_write_enlarge (hfd, bamoffset))
return written;
continue;
} else {
int bitmapoffsetbits;
int bitmapoffsetbytes;
bitmapoffsetbits = (offset / 512) % (hfd->vhd_blocksize / 512);
bitmapoffsetbytes = bitmapoffsetbits / 8;
uae_u64 sectormapblock = sectoroffset * (uae_u64)512 + (bitmapoffsetbytes & ~511);
if (hfd->vhd_sectormapblock != sectormapblock) {
// read sector bitmap
if (hdf_read_target (hfd, hfd->vhd_sectormap, sectormapblock, 512) != 512) {
write_log (L"vhd_write: bitmap read error\n");
return written;
}
hfd->vhd_sectormapblock = sectormapblock;
}
// write data
if (hdf_write_target (hfd, dataptr, sectoroffset * (uae_u64)512 + hfd->vhd_bitmapsize + bitmapoffsetbits * 512, 512) != 512) {
write_log (L"vhd_write: data write error\n");
return written;
}
// block already allocated in bitmap?
if (!(hfd->vhd_sectormap[bitmapoffsetbytes & 511] & (1 << (7 - (bitmapoffsetbits & 7))))) {
// no, we need to mark it allocated and write the modified bitmap back to the disk
hfd->vhd_sectormap[bitmapoffsetbytes & 511] |= (1 << (7 - (bitmapoffsetbits & 7)));
if (hdf_write_target (hfd, hfd->vhd_sectormap, sectormapblock, 512) != 512) {
write_log (L"vhd_write: bam write error\n");
return written;
}
}
written += 512;
}
len -= 512;
dataptr += 512;
offset += 512;
}
return written;
}
int vhd_create (const TCHAR *name, uae_u64 size, uae_u32 dostype)
{
struct hardfiledata hfd;
struct zfile *zf;
uae_u8 *b;
int cyl, cylsec, head, tracksec;
uae_u32 crc, blocksize, batsize, batentrysize;
int ret, i;
time_t tm;
if (size >= (uae_u64)10 * 1024 * 1024 * 1024)
blocksize = 2 * 1024 * 1024;
else
blocksize = 512 * 1024;
batsize = (size + blocksize - 1) / blocksize;
batentrysize = batsize;
batsize *= 4;
batsize += 511;
batsize &= ~511;
ret = 0;
b = NULL;
zf = zfile_fopen (name, L"wb", 0);
if (!zf)
goto end;
b = xcalloc (uae_u8, 512 + 1024 + batsize + 512);
if (zfile_fwrite (b, 512 + 1024 + batsize + 512, 1, zf) != 1)
goto end;
memset (&hfd, 0, sizeof hfd);
hfd.virtsize = hfd.physsize = size;
hfd.blocksize = 512;
strcpy ((char*)b, "conectix"); // cookie
b[0x0b] = 2; // features
b[0x0d] = 1; // version
b[0x10 + 6] = 2; // data offset
// time stamp
tm = time (NULL) - 946684800;
b[0x18] = tm >> 24;
b[0x19] = tm >> 16;
b[0x1a] = tm >> 8;
b[0x1b] = tm >> 0;
strcpy ((char*)b + 0x1c, "vpc "); // creator application
b[0x21] = 5; // creator version
strcpy ((char*)b + 0x24, "Wi2k"); // creator host os
// original and current size
b[0x28] = b[0x30] = size >> 56;
b[0x29] = b[0x31] = size >> 48;
b[0x2a] = b[0x32] = size >> 40;
b[0x2b] = b[0x33] = size >> 32;
b[0x2c] = b[0x34] = size >> 24;
b[0x2d] = b[0x35] = size >> 16;
b[0x2e] = b[0x36] = size >> 8;
b[0x2f] = b[0x37] = size >> 0;
getchs2 (&hfd, &cyl, &cylsec, &head, &tracksec);
// cylinders
b[0x38] = cyl >> 8;
b[0x39] = cyl;
// heads
b[0x3a] = head;
// sectors per track
b[0x3b] = tracksec;
// disk type
b[0x3c + 3] = VHD_DYNAMIC;
get_guid_target (b + 0x44);
crc = vhd_checksum (b, -1);
b[0x40] = crc >> 24;
b[0x41] = crc >> 16;
b[0x42] = crc >> 8;
b[0x43] = crc >> 0;
// write header
zfile_fseek (zf, 0, SEEK_SET);
zfile_fwrite (b, 512, 1, zf);
// write footer
zfile_fseek (zf, 512 + 1024 + batsize, SEEK_SET);
zfile_fwrite (b, 512, 1, zf);
// dynamic disk header
memset (b, 0, 1024);
// cookie
strcpy ((char*)b, "cxsparse");
// data offset
for (i = 0; i < 8; i++)
b[0x08 + i] = 0xff;
// table offset (bat)
b[0x10 + 6] = 0x06;
// version
b[0x19] = 1;
// max table entries
b[0x1c] = batentrysize >> 24;
b[0x1d] = batentrysize >> 16;
b[0x1e] = batentrysize >> 8;
b[0x1f] = batentrysize >> 0;
b[0x20] = blocksize >> 24;
b[0x21] = blocksize >> 16;
b[0x22] = blocksize >> 8;
b[0x23] = blocksize >> 0;
crc = vhd_checksum (b, -1);
b[0x24] = crc >> 24;
b[0x25] = crc >> 16;
b[0x26] = crc >> 8;
b[0x27] = crc >> 0;
// write dynamic header
zfile_fseek (zf, 512, SEEK_SET);
zfile_fwrite (b, 1024, 1, zf);
// bat
memset (b, 0, batsize);
memset (b, 0xff, batentrysize * 4);
zfile_fwrite (b, batsize, 1, zf);
zfile_fclose (zf);
zf = NULL;
if (dostype) {
uae_u8 bootblock[512] = { 0 };
bootblock[0] = dostype >> 24;
bootblock[1] = dostype >> 16;
bootblock[2] = dostype >> 8;
bootblock[3] = dostype >> 0;
if (hdf_open (&hfd, name)) {
vhd_write (&hfd, bootblock, 0, 512);
hdf_close (&hfd);
}
}
ret = 1;
end:
xfree (b);
zfile_fclose (zf);
return ret;
}
static int hdf_read2 (struct hardfiledata *hfd, void *buffer, uae_u64 offset, int len)
{
if (hfd->vhd_type == VHD_DYNAMIC)
return vhd_read (hfd, buffer, offset, len);
else if (hfd->vhd_type == VHD_FIXED)
return hdf_read_target (hfd, buffer, offset + 512, len);
else
return hdf_read_target (hfd, buffer, offset, len);
}
static void adide_decode (void *v, int len)
{
int i;
uae_u8 *buffer = (uae_u8*)v;
for (i = 0; i < len; i += 2) {
uae_u8 *b = buffer + i;
uae_u16 w = (b[0] << 8) | (b[1] << 0);
uae_u16 o = 0;
if (w & 0x8000)
o |= 0x0001;
if (w & 0x0001)
o |= 0x0002;
if (w & 0x4000)
o |= 0x0004;
if (w & 0x0002)
o |= 0x0008;
if (w & 0x2000)
o |= 0x0010;
if (w & 0x0004)
o |= 0x0020;
if (w & 0x1000)
o |= 0x0040;
if (w & 0x0008)
o |= 0x0080;
if (w & 0x0800)
o |= 0x0100;
if (w & 0x0010)
o |= 0x0200;
if (w & 0x0400)
o |= 0x0400;
if (w & 0x0020)
o |= 0x0800;
if (w & 0x0200)
o |= 0x1000;
if (w & 0x0040)
o |= 0x2000;
if (w & 0x0100)
o |= 0x4000;
if (w & 0x0080)
o |= 0x8000;
b[0] = o >> 8;
b[1] = o >> 0;
}
}
static void adide_encode (void *v, int len)
{
int i;
uae_u8 *buffer = (uae_u8*)v;
for (i = 0; i < len; i += 2) {
uae_u8 *b = buffer + i;
uae_u16 w = (b[0] << 8) | (b[1] << 0);
uae_u16 o = 0;
if (w & 0x0001)
o |= 0x8000;
if (w & 0x0002)
o |= 0x0001;
if (w & 0x0004)
o |= 0x4000;
if (w & 0x0008)
o |= 0x0002;
if (w & 0x0010)
o |= 0x2000;
if (w & 0x0020)
o |= 0x0004;
if (w & 0x0040)
o |= 0x1000;
if (w & 0x0080)
o |= 0x0008;
if (w & 0x0100)
o |= 0x0800;
if (w & 0x0200)
o |= 0x0010;
if (w & 0x0400)
o |= 0x0400;
if (w & 0x0800)
o |= 0x0020;
if (w & 0x1000)
o |= 0x0200;
if (w & 0x2000)
o |= 0x0040;
if (w & 0x4000)
o |= 0x0100;
if (w & 0x8000)
o |= 0x0080;
b[0] = o >> 8;
b[1] = o >> 0;
}
}
static void hdf_byteswap (void *v, int len)
{
int i;
uae_u8 *b = (uae_u8*)v;
for (i = 0; i < len; i += 2) {
uae_u8 tmp = b[i];
b[i] = b[i + 1];
b[i + 1] = tmp;
}
}
int hdf_read_rdb (struct hardfiledata *hfd, void *buffer, uae_u64 offset, int len)
{
int v;
v = hdf_read (hfd, buffer, offset, len);
if (v > 0 && offset < 16 * 512 && !hfd->byteswap && !hfd->adide) {
uae_u8 *buf = (uae_u8*)buffer;
bool changed = false;
if (buf[0] == 0x39 && buf[1] == 0x10 && buf[2] == 0xd3 && buf[3] == 0x12) { // AdIDE encoded "CPRM"
hfd->adide = 1;
changed = true;
write_log (L"HDF: adide scrambling detected\n");
} else if (!memcmp (buf, "DRKS", 4)) {
hfd->byteswap = 1;
changed = true;
write_log (L"HDF: byteswapped RDB detected\n");
}
if (changed)
v = hdf_read (hfd, buffer, offset, len);
}
return v;
}
int hdf_read (struct hardfiledata *hfd, void *buffer, uae_u64 offset, int len)
{
int v;
if (!hfd->adide) {
v = hdf_read2 (hfd, buffer, offset, len);
} else {
offset += 512;
v = hdf_read2 (hfd, buffer, offset, len);
adide_decode (buffer, len);
}
if (hfd->byteswap)
hdf_byteswap (buffer, len);
return v;
}
static int hdf_write2 (struct hardfiledata *hfd, void *buffer, uae_u64 offset, int len)
{
if (hfd->vhd_type == VHD_DYNAMIC)
return vhd_write (hfd, buffer, offset, len);
else if (hfd->vhd_type == VHD_FIXED)
return hdf_write_target (hfd, buffer, offset + 512, len);
else
return hdf_write_target (hfd, buffer, offset, len);
}
int hdf_write (struct hardfiledata *hfd, void *buffer, uae_u64 offset, int len)
{
int v;
if (hfd->byteswap)
hdf_byteswap (buffer, len);
if (!hfd->adide) {
v = hdf_write2 (hfd, buffer, offset, len);
} else {
offset += 512;
adide_encode (buffer, len);
v = hdf_write2 (hfd, buffer, offset, len);
adide_decode (buffer, len);
}
if (hfd->byteswap)
hdf_byteswap (buffer, len);
return v;
}
static uae_u64 cmd_readx (struct hardfiledata *hfd, uae_u8 *dataptr, uae_u64 offset, uae_u64 len)
{
gui_flicker_led (LED_HD, hfd->unitnum, 1);
hf_log3 (L"cmd_read: %p %04x-%08x (%d) %08x (%d)\n",
dataptr, (uae_u32)(offset >> 32), (uae_u32)offset, (uae_u32)(offset / hfd->blocksize), (uae_u32)len, (uae_u32)(len / hfd->blocksize));
return hdf_read (hfd, dataptr, offset, len);
}
static uae_u64 cmd_read (struct hardfiledata *hfd, uaecptr dataptr, uae_u64 offset, uae_u64 len)
{
addrbank *bank_data = &get_mem_bank (dataptr);
if (!bank_data || !bank_data->check (dataptr, len))
return 0;
return cmd_readx (hfd, bank_data->xlateaddr (dataptr), offset, len);
}
static uae_u64 cmd_writex (struct hardfiledata *hfd, uae_u8 *dataptr, uae_u64 offset, uae_u64 len)
{
gui_flicker_led (LED_HD, hfd->unitnum, 2);
hf_log3 (L"cmd_write: %p %04x-%08x (%d) %08x (%d)\n",
dataptr, (uae_u32)(offset >> 32), (uae_u32)offset, (uae_u32)(offset / hfd->blocksize), (uae_u32)len, (uae_u32)(len / hfd->blocksize));
return hdf_write (hfd, dataptr, offset, len);
}
static uae_u64 cmd_write (struct hardfiledata *hfd, uaecptr dataptr, uae_u64 offset, uae_u64 len)
{
addrbank *bank_data = &get_mem_bank (dataptr);
if (!bank_data || !bank_data->check (dataptr, len))
return 0;
return cmd_writex (hfd, bank_data->xlateaddr (dataptr), offset, len);
}
static int checkbounds (struct hardfiledata *hfd, uae_u64 offset, uae_u64 len)
{
if (offset >= hfd->virtsize)
return 0;
if (offset + len > hfd->virtsize)
return 0;
return 1;
}
static int nodisk (struct hardfiledata *hfd)
{
if (hfd->drive_empty)
return 1;
return 0;
}
int scsi_emulate (struct hardfiledata *hfd, struct hd_hardfiledata *hdhfd, uae_u8 *cmdbuf, int scsi_cmd_len,
uae_u8 *scsi_data, int *data_len, uae_u8 *r, int *reply_len, uae_u8 *s, int *sense_len)
{
uae_u64 len, offset;
int lr = 0, ls = 0;
int scsi_len = -1;
int status = 0;
int i;
char *ss;
*reply_len = *sense_len = 0;
memset (r, 0, 256);
memset (s, 0, 256);
switch (cmdbuf[0])
{
case 0x00: /* TEST UNIT READY */
if (nodisk (hfd))
goto nodisk;
scsi_len = 0;
break;
case 0x08: /* READ (6) */
if (nodisk (hfd))
goto nodisk;
offset = ((cmdbuf[1] & 31) << 16) | (cmdbuf[2] << 8) | cmdbuf[3];
offset *= hfd->blocksize;
len = cmdbuf[4];
if (!len)
len = 256;
len *= hfd->blocksize;
if (checkbounds(hfd, offset, len))