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pistorm/platforms/amiga/piscsi/piscsi.c
Andrew Hutchings 10d5229b68 Add license information to source 
MIT license was chosen
2021-04-16 09:06:27 +01:00

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// SPDX-License-Identifier: MIT
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <endian.h>
#include "config_file/config_file.h"
#include "gpio/ps_protocol.h"
#include "piscsi-enums.h"
#include "piscsi.h"
#include "platforms/amiga/hunk-reloc.h"
#define BE(val) be32toh(val)
#define BE16(val) be16toh(val)
// Uncomment the line below to enable debug output
//#define PISCSI_DEBUG
#ifdef PISCSI_DEBUG
#define DEBUG printf
//#define DEBUG_TRIVIAL printf
#define DEBUG_TRVIAL(...)
extern void stop_cpu_emulation(uint8_t disasm_cur);
static const char *op_type_names[4] = {
"BYTE",
"WORD",
"LONGWORD",
"MEM",
};
#else
#define DEBUG(...)
#define DEBUG_TRIVIAL(...)
#define stop_cpu_emulation(...)
#endif
#ifdef FAKESTORM
#define lseek64 lseek
#endif
extern struct emulator_config *cfg;
struct piscsi_dev devs[8];
struct piscsi_fs filesystems[NUM_FILESYSTEMS];
uint8_t piscsi_num_fs = 0;
uint8_t piscsi_cur_drive = 0;
uint32_t piscsi_u32[4];
uint32_t piscsi_dbg[8];
uint32_t piscsi_rom_size = 0;
uint8_t *piscsi_rom_ptr;
uint32_t rom_partitions[128];
uint32_t rom_partition_prio[128];
uint32_t rom_partition_dostype[128];
uint32_t rom_cur_partition = 0, rom_cur_fs = 0;
extern unsigned char ac_piscsi_rom[];
//static const char *partition_marker = "PART";
struct hunk_info piscsi_hinfo;
struct hunk_reloc piscsi_hreloc[256];
void piscsi_init() {
for (int i = 0; i < 8; i++) {
devs[i].fd = -1;
devs[i].lba = 0;
devs[i].c = devs[i].h = devs[i].s = 0;
}
FILE *in = fopen("./platforms/amiga/piscsi/piscsi.rom", "rb");
if (in == NULL) {
printf("[PISCSI] Could not open PISCSI Boot ROM file for reading!\n");
// Zero out the boot ROM offset from the autoconfig ROM.
ac_piscsi_rom[20] = 0;
ac_piscsi_rom[21] = 0;
ac_piscsi_rom[22] = 0;
ac_piscsi_rom[23] = 0;
return;
}
fseek(in, 0, SEEK_END);
piscsi_rom_size = ftell(in);
fseek(in, 0, SEEK_SET);
piscsi_rom_ptr = malloc(piscsi_rom_size);
fread(piscsi_rom_ptr, piscsi_rom_size, 1, in);
fseek(in, PISCSI_DRIVER_OFFSET, SEEK_SET);
process_hunks(in, &piscsi_hinfo, piscsi_hreloc, PISCSI_DRIVER_OFFSET);
fclose(in);
printf("[PISCSI] Loaded Boot ROM.\n");
}
void piscsi_find_partitions(struct piscsi_dev *d) {
int fd = d->fd;
int cur_partition = 0;
uint8_t tmp;
for (int i = 0; i < 16; i++) {
if (d->pb[i]) {
free(d->pb[i]);
d->pb[i] = NULL;
}
}
if (!d->rdb || d->rdb->rdb_PartitionList == 0) {
DEBUG("[PISCSI] No partitions on disk.\n");
return;
}
char *block = malloc(512);
lseek(fd, BE(d->rdb->rdb_PartitionList) * 512, SEEK_SET);
next_partition:;
read(fd, block, 512);
uint32_t first = be32toh(*((uint32_t *)&block[0]));
if (first != PART_IDENTIFIER) {
DEBUG("Entry at block %d is not a valid partition. Aborting.\n", BE(d->rdb->rdb_PartitionList));
return;
}
struct PartitionBlock *pb = (struct PartitionBlock *)block;
tmp = pb->pb_DriveName[0];
pb->pb_DriveName[tmp + 1] = 0x00;
DEBUG("[PISCSI] Partition %d: %s\n", cur_partition, pb->pb_DriveName + 1);
DEBUG("Checksum: %.8X HostID: %d\n", BE(pb->pb_ChkSum), BE(pb->pb_HostID));
DEBUG("Flags: %d (%.8X) Devflags: %d (%.8X)\n", BE(pb->pb_Flags), BE(pb->pb_Flags), BE(pb->pb_DevFlags), BE(pb->pb_DevFlags));
d->pb[cur_partition] = pb;
if (d->pb[cur_partition]->pb_Next != 0xFFFFFFFF) {
uint64_t next = be32toh(pb->pb_Next);
block = malloc(512);
lseek64(fd, next * 512, SEEK_SET);
cur_partition++;
DEBUG("[PISCSI] Next partition at block %d.\n", be32toh(pb->pb_Next));
goto next_partition;
}
DEBUG("[PISCSI] No more partitions on disk.\n");
d->num_partitions = cur_partition + 1;
d->fshd_offs = lseek64(fd, 0, SEEK_CUR);
return;
}
int piscsi_parse_rdb(struct piscsi_dev *d) {
int fd = d->fd;
int i = 0;
uint8_t *block = malloc(512);
lseek(fd, 0, SEEK_SET);
for (i = 0; i < RDB_BLOCK_LIMIT; i++) {
read(fd, block, 512);
uint32_t first = be32toh(*((uint32_t *)&block[0]));
if (first == RDB_IDENTIFIER)
goto rdb_found;
}
goto no_rdb_found;
rdb_found:;
struct RigidDiskBlock *rdb = (struct RigidDiskBlock *)block;
DEBUG("[PISCSI] RDB found at block %d.\n", i);
d->c = be32toh(rdb->rdb_Cylinders);
d->h = be32toh(rdb->rdb_Heads);
d->s = be32toh(rdb->rdb_Sectors);
d->num_partitions = 0;
DEBUG("[PISCSI] RDB - first partition at block %d.\n", be32toh(rdb->rdb_PartitionList));
if (d->rdb)
free(d->rdb);
d->rdb = rdb;
sprintf(d->rdb->rdb_DriveInitName, "pi-scsi.device");
return 0;
no_rdb_found:;
if (block)
free(block);
return -1;
}
void piscsi_refresh_drives() {
piscsi_num_fs = 0;
for (int i = 0; i < NUM_FILESYSTEMS; i++) {
if (filesystems[i].binary_data) {
free(filesystems[i].binary_data);
filesystems[i].binary_data = NULL;
}
if (filesystems[i].fhb) {
free(filesystems[i].fhb);
filesystems[i].fhb = NULL;
}
filesystems[i].h_info.current_hunk = 0;
filesystems[i].h_info.reloc_hunks = 0;
filesystems[i].FS_ID = 0;
filesystems[i].handler = 0;
}
rom_cur_fs = 0;
for (int i = 0; i < NUM_UNITS; i++) {
if (devs[i].fd != -1) {
piscsi_parse_rdb(&devs[i]);
piscsi_find_partitions(&devs[i]);
piscsi_find_filesystems(&devs[i]);
}
}
}
void piscsi_find_filesystems(struct piscsi_dev *d) {
if (!d->num_partitions)
return;
uint8_t fs_found = 0;
uint8_t *fhb_block = malloc(512);
lseek64(d->fd, d->fshd_offs, SEEK_SET);
struct FileSysHeaderBlock *fhb = (struct FileSysHeaderBlock *)fhb_block;
read(d->fd, fhb_block, 512);
while (BE(fhb->fhb_ID) == FS_IDENTIFIER) {
char *dosID = (char *)&fhb->fhb_DosType;
#ifdef PISCSI_DEBUG
uint16_t *fsVer = (uint16_t *)&fhb->fhb_Version;
DEBUG("[FSHD] FSHD Block found.\n");
DEBUG("[FSHD] HostID: %d Next: %d Size: %d\n", BE(fhb->fhb_HostID), BE(fhb->fhb_Next), BE(fhb->fhb_SummedLongs));
DEBUG("[FSHD] Flags: %.8X DOSType: %c%c%c/%d\n", BE(fhb->fhb_Flags), dosID[0], dosID[1], dosID[2], dosID[3]);
DEBUG("[FSHD] Version: %d.%d\n", BE16(fsVer[0]), BE16(fsVer[1]));
DEBUG("[FSHD] Patchflags: %d Type: %d\n", BE(fhb->fhb_PatchFlags), BE(fhb->fhb_Type));
DEBUG("[FSHD] Task: %d Lock: %d\n", BE(fhb->fhb_Task), BE(fhb->fhb_Lock));
DEBUG("[FSHD] Handler: %d StackSize: %d\n", BE(fhb->fhb_Handler), BE(fhb->fhb_StackSize));
DEBUG("[FSHD] Prio: %d Startup: %d\n", BE(fhb->fhb_Priority), BE(fhb->fhb_Startup));
DEBUG("[FSHD] SegListBlocks: %d GlobalVec: %d\n", BE(fhb->fhb_Priority), BE(fhb->fhb_Startup));
DEBUG("[FSHD] FileSysName: %s\n", fhb->fhb_FileSysName + 1);
#endif
for (int i = 0; i < NUM_FILESYSTEMS; i++) {
if (filesystems[i].FS_ID == fhb->fhb_DosType) {
DEBUG("[FSHD] File system %c%c%c/%d already loaded. Skipping.\n", dosID[0], dosID[1], dosID[2], dosID[3]);
if (BE(fhb->fhb_Next) == 0xFFFFFFFF)
goto fs_done;
goto skip_fs_load_lseg;
}
}
if (load_lseg(d->fd, &filesystems[piscsi_num_fs].binary_data, &filesystems[piscsi_num_fs].h_info, filesystems[piscsi_num_fs].relocs) != -1) {
filesystems[piscsi_num_fs].FS_ID = fhb->fhb_DosType;
filesystems[piscsi_num_fs].fhb = fhb;
printf("[FSHD] Loaded and set up file system %d: %c%c%c/%d\n", piscsi_num_fs + 1, dosID[0], dosID[1], dosID[2], dosID[3]);
piscsi_num_fs++;
}
skip_fs_load_lseg:;
fs_found++;
lseek64(d->fd, BE(fhb->fhb_Next) * 512, SEEK_SET);
fhb_block = malloc(512);
fhb = (struct FileSysHeaderBlock *)fhb_block;
read(d->fd, fhb_block, 512);
}
if (!fs_found) {
DEBUG("[!!!FSHD] No file systems found on hard drive!\n");
}
fs_done:;
if (fhb_block)
free(fhb_block);
}
void piscsi_map_drive(char *filename, uint8_t index) {
if (index > 7) {
printf("[PISCSI] Drive index %d out of range.\nUnable to map file %s to drive.\n", index, filename);
return;
}
int32_t tmp_fd = open(filename, O_RDWR);
if (tmp_fd == -1) {
printf("[PISCSI] Failed to open file %s, could not map drive %d.\n", filename, index);
return;
}
struct piscsi_dev *d = &devs[index];
uint64_t file_size = lseek(tmp_fd, 0, SEEK_END);
d->fs = file_size;
d->fd = tmp_fd;
lseek(tmp_fd, 0, SEEK_SET);
printf("[PISCSI] Map %d: [%s] - %llu bytes.\n", index, filename, file_size);
if (piscsi_parse_rdb(d) == -1) {
DEBUG("[PISCSI] No RDB found on disk, making up some CHS values.\n");
d->h = 16;
d->s = 63;
d->c = (file_size / 512) / (d->s * d->h);
}
printf("[PISCSI] CHS: %d %d %d\n", d->c, d->h, d->s);
piscsi_find_partitions(d);
piscsi_find_filesystems(d);
}
void piscsi_unmap_drive(uint8_t index) {
if (devs[index].fd != -1) {
DEBUG("[PISCSI] Unmapped drive %d.\n", index);
close (devs[index].fd);
devs[index].fd = -1;
}
}
char *io_cmd_name(int index) {
switch (index) {
case CMD_INVALID: return "INVALID";
case CMD_RESET: return "RESET";
case CMD_READ: return "READ";
case CMD_WRITE: return "WRITE";
case CMD_UPDATE: return "UPDATE";
case CMD_CLEAR: return "CLEAR";
case CMD_STOP: return "STOP";
case CMD_START: return "START";
case CMD_FLUSH: return "FLUSH";
case TD_MOTOR: return "TD_MOTOR";
case TD_SEEK: return "SEEK";
case TD_FORMAT: return "FORMAT";
case TD_REMOVE: return "REMOVE";
case TD_CHANGENUM: return "CHANGENUM";
case TD_CHANGESTATE: return "CHANGESTATE";
case TD_PROTSTATUS: return "PROTSTATUS";
case TD_RAWREAD: return "RAWREAD";
case TD_RAWWRITE: return "RAWWRITE";
case TD_GETDRIVETYPE: return "GETDRIVETYPE";
case TD_GETNUMTRACKS: return "GETNUMTRACKS";
case TD_ADDCHANGEINT: return "ADDCHANGEINT";
case TD_REMCHANGEINT: return "REMCHANGEINT";
case TD_GETGEOMETRY: return "GETGEOMETRY";
case TD_EJECT: return "EJECT";
case TD_LASTCOMM: return "LASTCOMM/READ64";
case TD_WRITE64: return "WRITE64";
case HD_SCSICMD: return "HD_SCSICMD";
case NSCMD_DEVICEQUERY: return "NSCMD_DEVICEQUERY";
case NSCMD_TD_READ64: return "NSCMD_TD_READ64";
case NSCMD_TD_WRITE64: return "NSCMD_TD_WRITE64";
case NSCMD_TD_FORMAT64: return "NSCMD_TD_FORMAT64";
default:
return "[!!!PISCSI] Unhandled IO command";
}
}
#define GETSCSINAME(a) case a: return ""#a"";
#define SCSIUNHANDLED(a) return "[!!!PISCSI] Unhandled SCSI command "#a"";
char *scsi_cmd_name(int index) {
switch(index) {
GETSCSINAME(SCSICMD_TEST_UNIT_READY);
GETSCSINAME(SCSICMD_INQUIRY);
GETSCSINAME(SCSICMD_READ_6);
GETSCSINAME(SCSICMD_WRITE_6);
GETSCSINAME(SCSICMD_READ_10);
GETSCSINAME(SCSICMD_WRITE_10);
GETSCSINAME(SCSICMD_READ_CAPACITY_10);
GETSCSINAME(SCSICMD_MODE_SENSE_6);
GETSCSINAME(SCSICMD_READ_DEFECT_DATA_10);
default:
return "[!!!PISCSI] Unhandled SCSI command";
}
}
void print_piscsi_debug_message(int index) {
int32_t r = 0;
switch (index) {
case DBG_INIT:
DEBUG("[PISCSI] Initializing devices.\n");
break;
case DBG_OPENDEV:
if (piscsi_dbg[0] != 255) {
DEBUG("[PISCSI] Opening device %d (%d). Flags: %d (%.2X)\n", piscsi_dbg[0], piscsi_dbg[2], piscsi_dbg[1], piscsi_dbg[1]);
}
break;
case DBG_CLEANUP:
DEBUG("[PISCSI] Cleaning up.\n");
break;
case DBG_CHS:
DEBUG("[PISCSI] C/H/S: %d / %d / %d\n", piscsi_dbg[0], piscsi_dbg[1], piscsi_dbg[2]);
break;
case DBG_BEGINIO:
DEBUG("[PISCSI] BeginIO: io_Command: %d (%s) - io_Flags = %d - quick: %d\n", piscsi_dbg[0], io_cmd_name(piscsi_dbg[0]), piscsi_dbg[1], piscsi_dbg[2]);
break;
case DBG_ABORTIO:
DEBUG("[PISCSI] AbortIO!\n");
break;
case DBG_SCSICMD:
DEBUG("[PISCSI] SCSI Command %d (%s)\n", piscsi_dbg[1], scsi_cmd_name(piscsi_dbg[1]));
DEBUG("Len: %d - %.2X %.2X %.2X - Command Length: %d\n", piscsi_dbg[0], piscsi_dbg[1], piscsi_dbg[2], piscsi_dbg[3], piscsi_dbg[4]);
break;
case DBG_SCSI_UNKNOWN_MODESENSE:
DEBUG("[!!!PISCSI] SCSI: Unknown modesense %.4X\n", piscsi_dbg[0]);
break;
case DBG_SCSI_UNKNOWN_COMMAND:
DEBUG("[!!!PISCSI] SCSI: Unknown command %.4X\n", piscsi_dbg[0]);
break;
case DBG_SCSIERR:
DEBUG("[!!!PISCSI] SCSI: An error occured: %.4X\n", piscsi_dbg[0]);
break;
case DBG_IOCMD:
DEBUG_TRIVIAL("[PISCSI] IO Command %d (%s)\n", piscsi_dbg[0], io_cmd_name(piscsi_dbg[0]));
break;
case DBG_IOCMD_UNHANDLED:
DEBUG("[!!!PISCSI] WARN: IO command %.4X (%s) is unhandled by driver.\n", piscsi_dbg[0], io_cmd_name(piscsi_dbg[0]));
break;
case DBG_SCSI_FORMATDEVICE:
DEBUG("[PISCSI] Get SCSI FormatDevice MODE SENSE.\n");
break;
case DBG_SCSI_RDG:
DEBUG("[PISCSI] Get SCSI RDG MODE SENSE.\n");
break;
case DBG_SCSICMD_RW10:
#ifdef PISCSI_DEBUG
r = get_mapped_item_by_address(cfg, piscsi_dbg[0]);
struct SCSICmd_RW10 *rwdat = NULL;
char data[10];
if (r != -1) {
uint32_t addr = piscsi_dbg[0] - cfg->map_offset[r];
rwdat = (struct SCSICmd_RW10 *)(&cfg->map_data[r][addr]);
}
else {
DEBUG_TRIVIAL("[RW10] scsiData: %.8X\n", piscsi_dbg[0]);
for (int i = 0; i < 10; i++) {
data[i] = read8(piscsi_dbg[0] + i);
}
rwdat = data;
}
if (rwdat) {
DEBUG_TRIVIAL("[RW10] CMD: %.2X\n", rwdat->opcode);
DEBUG_TRIVIAL("[RW10] RDP: %.2X\n", rwdat->rdprotect_flags);
DEBUG_TRIVIAL("[RW10] Block: %d (%d)\n", rwdat->block, BE(rwdat->block));
DEBUG_TRIVIAL("[RW10] Res_Group: %.2X\n", rwdat->res_groupnum);
DEBUG_TRIVIAL("[RW10] Len: %d (%d)\n", rwdat->len, BE16(rwdat->len));
}
#endif
break;
case DBG_SCSI_DEBUG_MODESENSE_6:
DEBUG_TRIVIAL("[PISCSI] SCSI ModeSense debug. Data: %.8X\n", piscsi_dbg[0]);
r = get_mapped_item_by_address(cfg, piscsi_dbg[0]);
if (r != -1) {
#ifdef PISCSI_DEBUG
uint32_t addr = piscsi_dbg[0] - cfg->map_offset[r];
struct SCSICmd_ModeSense6 *sense = (struct SCSICmd_ModeSense6 *)(&cfg->map_data[r][addr]);
DEBUG_TRIVIAL("[SenseData] CMD: %.2X\n", sense->opcode);
DEBUG_TRIVIAL("[SenseData] DBD: %d\n", sense->reserved_dbd & 0x04);
DEBUG_TRIVIAL("[SenseData] PC: %d\n", (sense->pc_pagecode & 0xC0 >> 6));
DEBUG_TRIVIAL("[SenseData] PageCodes: %.2X %.2X\n", (sense->pc_pagecode & 0x3F), sense->subpage_code);
DEBUG_TRIVIAL("[SenseData] AllocLen: %d\n", sense->alloc_len);
DEBUG_TRIVIAL("[SenseData] Control: %.2X (%d)\n", sense->control, sense->control);
#endif
}
else {
DEBUG("[!!!PISCSI] ModeSense data not immediately available.\n");
}
break;
default:
DEBUG("[!!!PISCSI] No debug message available for index %d.\n", index);
break;
}
}
#define DEBUGME_SIMPLE(i, s) case i: DEBUG(s); break;
void piscsi_debugme(uint32_t index) {
switch (index) {
DEBUGME_SIMPLE(1, "[PISCSI-DEBUGME] Arrived at DiagEntry.\n");
DEBUGME_SIMPLE(3, "[PISCSI-DEBUGME] Init: Interrupt disable.\n");
DEBUGME_SIMPLE(4, "[PISCSI-DEBUGME] Init: Copy/reloc driver.\n");
DEBUGME_SIMPLE(5, "[PISCSI-DEBUGME] Init: InitResident.\n");
DEBUGME_SIMPLE(7, "[PISCSI-DEBUGME] Init: Begin partition loop.\n");
DEBUGME_SIMPLE(8, "[PISCSI-DEBUGME] Init: Partition loop done. Cleaning up and returning to Exec.\n");
DEBUGME_SIMPLE(9, "[PISCSI-DEBUGME] Init: Load file systems.\n");
DEBUGME_SIMPLE(10, "[PISCSI-DEBUGME] Init: AllocMem for resident.\n");
DEBUGME_SIMPLE(11, "[PISCSI-DEBUGME] Init: Checking if resident is loaded.\n");
DEBUGME_SIMPLE(22, "[PISCSI-DEBUGME] Arrived at BootEntry.\n");
DEBUGME_SIMPLE(30, "[PISCSI-DEBUGME] LoadFileSystems: Opening FileSystem.resource.\n");
DEBUGME_SIMPLE(33, "[PISCSI-DEBUGME] FileSystem.resource not available, creating.\n");
case 31:
DEBUG("[PISCSI-DEBUGME] OpenResource result: %d\n", piscsi_u32[0]);
break;
case 32:
DEBUG("AAAAHH!\n");
break;
default:
DEBUG("[!!!PISCSI-DEBUGME] No debugme message for index %d!\n", index);
break;
}
if (index == 8) {
stop_cpu_emulation(1);
}
}
void handle_piscsi_write(uint32_t addr, uint32_t val, uint8_t type) {
int32_t r;
#ifndef PISCSI_DEBUG
if (type) {}
#endif
struct piscsi_dev *d = &devs[piscsi_cur_drive];
uint16_t cmd = (addr & 0xFFFF);
switch (cmd) {
case PISCSI_CMD_READ64:
case PISCSI_CMD_READ:
d = &devs[val];
if (d->fd == -1) {
DEBUG("[!!!PISCSI] BUG: Attempted read from unmapped drive %d.\n", val);
break;
}
if (cmd == PISCSI_CMD_READ) {
DEBUG("[PISCSI-%d] %d byte READ from block %d to address %.8X\n", val, piscsi_u32[1], piscsi_u32[0], piscsi_u32[2]);
d->lba = piscsi_u32[0];
lseek(d->fd, (piscsi_u32[0] * 512), SEEK_SET);
}
else {
uint64_t src = piscsi_u32[3];
src = (src << 32) | piscsi_u32[0];
DEBUG("[PISCSI-%d] %d byte READ64 from block %lld to address %.8X\n", val, piscsi_u32[1], (src / 512), piscsi_u32[2]);
d->lba = (src / 512);
lseek64(d->fd, src, SEEK_SET);
}
r = get_mapped_item_by_address(cfg, piscsi_u32[2]);
if (r != -1 && cfg->map_type[r] == MAPTYPE_RAM) {
DEBUG_TRIVIAL("[PISCSI-%d] \"DMA\" Read goes to mapped range %d.\n", val, r);
read(d->fd, cfg->map_data[r] + piscsi_u32[2] - cfg->map_offset[r], piscsi_u32[1]);
}
else {
DEBUG_TRIVIAL("[PISCSI-%d] No mapped range found for read.\n", val);
uint8_t c = 0;
for (uint32_t i = 0; i < piscsi_u32[1]; i++) {
read(d->fd, &c, 1);
write8(piscsi_u32[2] + i, (uint32_t)c);
}
}
break;
case PISCSI_CMD_WRITE64:
case PISCSI_CMD_WRITE:
d = &devs[val];
if (d->fd == -1) {
DEBUG ("[PISCSI] BUG: Attempted write to unmapped drive %d.\n", val);
break;
}
if (cmd == PISCSI_CMD_WRITE) {
DEBUG("[PISCSI-%d] %d byte WRITE to block %d from address %.8X\n", val, piscsi_u32[1], piscsi_u32[0], piscsi_u32[2]);
d->lba = piscsi_u32[0];
lseek(d->fd, (piscsi_u32[0] * 512), SEEK_SET);
}
else {
uint64_t src = piscsi_u32[3];
src = (src << 32) | piscsi_u32[0];
DEBUG("[PISCSI-%d] %d byte WRITE64 to block %lld from address %.8X\n", val, piscsi_u32[1], (src / 512), piscsi_u32[2]);
d->lba = (src / 512);
lseek64(d->fd, src, SEEK_SET);
}
r = get_mapped_item_by_address(cfg, piscsi_u32[2]);
if (r != -1) {
DEBUG_TRIVIAL("[PISCSI-%d] \"DMA\" Write comes from mapped range %d.\n", val, r);
write(d->fd, cfg->map_data[r] + piscsi_u32[2] - cfg->map_offset[r], piscsi_u32[1]);
}
else {
DEBUG_TRIVIAL("[PISCSI-%d] No mapped range found for write.\n", val);
uint8_t c = 0;
for (uint32_t i = 0; i < piscsi_u32[1]; i++) {
c = read8(piscsi_u32[2] + i);
write(d->fd, &c, 1);
}
}
break;
case PISCSI_CMD_ADDR1: case PISCSI_CMD_ADDR2: case PISCSI_CMD_ADDR3: case PISCSI_CMD_ADDR4: {
int i = ((addr & 0xFFFF) - PISCSI_CMD_ADDR1) / 4;
piscsi_u32[i] = val;
break;
}
case PISCSI_CMD_DRVNUM:
//printf("%d ", val);
if (val % 10 != 0)
piscsi_cur_drive = 255;
else
piscsi_cur_drive = val / 10;
if (piscsi_cur_drive > NUM_UNITS)
piscsi_cur_drive = 255;
if (piscsi_cur_drive != 255) {
DEBUG("[PISCSI] (%s) Drive number set to %d (%d)\n", op_type_names[type], piscsi_cur_drive, val);
}
break;
case PISCSI_CMD_DEBUGME:
piscsi_debugme(val);
break;
case PISCSI_CMD_DRIVER: {
DEBUG("[PISCSI] Driver copy/patch called, destination address %.8X.\n", val);
int r = get_mapped_item_by_address(cfg, val);
if (r != -1) {
uint32_t addr = val - cfg->map_offset[r];
uint8_t *dst_data = cfg->map_data[r];
uint8_t cur_partition = 0;
memcpy(dst_data + addr, piscsi_rom_ptr + PISCSI_DRIVER_OFFSET, 0x4000 - PISCSI_DRIVER_OFFSET);
piscsi_hinfo.base_offset = val;
reloc_hunks(piscsi_hreloc, dst_data + addr, &piscsi_hinfo);
#define PUTNODELONG(val) *(uint32_t *)&dst_data[p_offs] = htobe32(val); p_offs += 4;
#define PUTNODELONGBE(val) *(uint32_t *)&dst_data[p_offs] = val; p_offs += 4;
for (int i = 0; i < 128; i++) {
rom_partitions[i] = 0;
rom_partition_prio[i] = 0;
rom_partition_dostype[i] = 0;
}
rom_cur_partition = 0;
uint32_t data_addr = addr + 0x3F00;
sprintf((char *)dst_data + data_addr, "pi-scsi.device");
uint32_t addr2 = addr + 0x4000;
for (int i = 0; i < NUM_UNITS; i++) {
if (devs[i].fd != -1)
piscsi_find_partitions(&devs[i]);
else
goto skip_disk;
if (devs[i].num_partitions) {
uint32_t p_offs = addr2;
DEBUG("[PISCSI] Adding %d partitions for unit %d\n", devs[i].num_partitions, i);
for (uint32_t j = 0; j < devs[i].num_partitions; j++) {
DEBUG("Partition %d: %s\n", j, devs[i].pb[j]->pb_DriveName + 1);
sprintf((char *)dst_data + p_offs, "%s", devs[i].pb[j]->pb_DriveName + 1);
p_offs += 0x20;
PUTNODELONG(addr2 + cfg->map_offset[r]);
PUTNODELONG(data_addr + cfg->map_offset[r]);
PUTNODELONG((i * 10));
PUTNODELONG(0);
uint32_t nodesize = (be32toh(devs[i].pb[j]->pb_Environment[0]) + 1) * 4;
memcpy(dst_data + p_offs, devs[i].pb[j]->pb_Environment, nodesize);
struct pihd_dosnode_data *dat = (struct pihd_dosnode_data *)(&dst_data[addr2+0x20]);
if (BE(devs[i].pb[j]->pb_Flags) & 0x01) {
DEBUG("Partition is bootable.\n");
rom_partition_prio[cur_partition] = 0;
dat->priority = 0;
}
else {
DEBUG("Partition is not bootable.\n");
rom_partition_prio[cur_partition] = -128;
dat->priority = htobe32(-128);
}
DEBUG("DOSNode Data:\n");
DEBUG("Name: %s Device: %s\n", dst_data + addr2, dst_data + data_addr);
DEBUG("Unit: %d Flags: %d Pad1: %d\n", BE(dat->unit), BE(dat->flags), BE(dat->pad1));
DEBUG("Node len: %d Block len: %d\n", BE(dat->node_len) * 4, BE(dat->block_len) * 4);
DEBUG("H: %d SPB: %d BPS: %d\n", BE(dat->surf), BE(dat->secs_per_block), BE(dat->blocks_per_track));
DEBUG("Reserved: %d Prealloc: %d\n", BE(dat->reserved_blocks), BE(dat->pad2));
DEBUG("Interleaved: %d Buffers: %d Memtype: %d\n", BE(dat->interleave), BE(dat->buffers), BE(dat->mem_type));
DEBUG("Lowcyl: %d Highcyl: %d Prio: %d\n", BE(dat->lowcyl), BE(dat->highcyl), BE(dat->priority));
DEBUG("Maxtransfer: %.8X Mask: %.8X\n", BE(dat->maxtransfer), BE(dat->transfer_mask));
DEBUG("DOSType: %.8X\n", BE(dat->dostype));
rom_partitions[cur_partition] = addr2 + 0x20 + cfg->map_offset[r];
rom_partition_dostype[cur_partition] = dat->dostype;
cur_partition++;
addr2 += 0x100;
p_offs = addr2;
}
}
skip_disk:;
}
}
break;
}
case PISCSI_CMD_NEXTPART:
DEBUG("[PISCSI] Switch partition %d -> %d\n", rom_cur_partition, rom_cur_partition + 1);
rom_cur_partition++;
break;
case PISCSI_CMD_NEXTFS:
DEBUG("[PISCSI] Switch file file system %d -> %d\n", rom_cur_fs, rom_cur_fs + 1);
rom_cur_fs++;
break;
case PISCSI_CMD_COPYFS:
DEBUG("[PISCSI] Copy file system %d to %.8X and reloc.\n", rom_cur_fs, piscsi_u32[2]);
r = get_mapped_item_by_address(cfg, piscsi_u32[2]);
if (r != -1) {
uint32_t addr = piscsi_u32[2] - cfg->map_offset[r];
memset(cfg->map_data[r] + addr, 0x00, filesystems[rom_cur_fs].h_info.alloc_size);
memcpy(cfg->map_data[r] + addr, filesystems[rom_cur_fs].binary_data, filesystems[rom_cur_fs].h_info.byte_size);
filesystems[rom_cur_fs].h_info.base_offset = piscsi_u32[2];
reloc_hunks(filesystems[rom_cur_fs].relocs, cfg->map_data[r] + addr, &filesystems[rom_cur_fs].h_info);
filesystems[rom_cur_fs].handler = piscsi_u32[2];
}
break;
case PISCSI_CMD_SETFSH: {
int i = 0;
DEBUG("[PISCSI] Set handler for partition %d (DeviceNode: %.8X)\n", rom_cur_partition, val);
r = get_mapped_item_by_address(cfg, val);
if (r != -1) {
uint32_t addr = val - cfg->map_offset[r];
struct DeviceNode *node = (struct DeviceNode *)(cfg->map_data[r] + addr);
#ifdef PISCSI_DEBUG
char *dosID = (char *)&rom_partition_dostype[rom_cur_partition];
#endif
DEBUG("[PISCSI] Partition DOSType is %c%c%c/%d\n", dosID[0], dosID[1], dosID[2], dosID[3]);
for (i = 0; i < piscsi_num_fs; i++) {
if (rom_partition_dostype[rom_cur_partition] == filesystems[i].FS_ID) {
node->dn_SegList = htobe32((filesystems[i].handler >> 2));
node->dn_GlobalVec = 0xFFFFFFFF;
goto fs_found;
}
}
DEBUG("[!!!PISCSI] Found no handler for file system!\n");
fs_found:;
DEBUG("[FS-HANDLER] Next: %d Type: %.8X\n", BE(node->dn_Next), BE(node->dn_Type));
DEBUG("[FS-HANDLER] Task: %d Lock: %d\n", BE(node->dn_Task), BE(node->dn_Lock));
DEBUG("[FS-HANDLER] Handler: %d Stacksize: %d\n", BE((uint32_t)node->dn_Handler), BE(node->dn_StackSize));
DEBUG("[FS-HANDLER] Priority: %d Startup: %d\n", BE((uint32_t)node->dn_Priority), BE(node->dn_Startup));
DEBUG("[FS-HANDLER] SegList: %.8X GlobalVec: %d\n", BE((uint32_t)node->dn_SegList), BE(node->dn_GlobalVec));
DEBUG("[PISCSI] Handler for partition %.8X set to %.8X (%.8X).\n", BE((uint32_t)node->dn_Name), filesystems[i].FS_ID, filesystems[i].handler);
}
break;
}
case PISCSI_DBG_VAL1: case PISCSI_DBG_VAL2: case PISCSI_DBG_VAL3: case PISCSI_DBG_VAL4:
case PISCSI_DBG_VAL5: case PISCSI_DBG_VAL6: case PISCSI_DBG_VAL7: case PISCSI_DBG_VAL8: {
int i = ((addr & 0xFFFF) - PISCSI_DBG_VAL1) / 4;
piscsi_dbg[i] = val;
break;
}
case PISCSI_DBG_MSG:
print_piscsi_debug_message(val);
break;
default:
DEBUG("[!!!PISCSI] WARN: Unhandled %s register write to %.8X: %d\n", op_type_names[type], addr, val);
break;
}
}
#define PIB 0x00
uint32_t handle_piscsi_read(uint32_t addr, uint8_t type) {
if (type) {}
if ((addr & 0xFFFF) >= PISCSI_CMD_ROM) {
uint32_t romoffs = (addr & 0xFFFF) - PISCSI_CMD_ROM;
if (romoffs < (piscsi_rom_size + PIB)) {
//DEBUG("[PISCSI] %s read from Boot ROM @$%.4X (%.8X): ", op_type_names[type], romoffs, addr);
uint32_t v = 0;
switch (type) {
case OP_TYPE_BYTE:
v = piscsi_rom_ptr[romoffs - PIB];
//DEBUG("%.2X\n", v);
break;
case OP_TYPE_WORD:
v = be16toh(*((uint16_t *)&piscsi_rom_ptr[romoffs - PIB]));
//DEBUG("%.4X\n", v);
break;
case OP_TYPE_LONGWORD:
v = be32toh(*((uint32_t *)&piscsi_rom_ptr[romoffs - PIB]));
//DEBUG("%.8X\n", v);
break;
}
return v;
}
return 0;
}
switch (addr & 0xFFFF) {
case PISCSI_CMD_ADDR1: case PISCSI_CMD_ADDR2: case PISCSI_CMD_ADDR3: case PISCSI_CMD_ADDR4: {
int i = ((addr & 0xFFFF) - PISCSI_CMD_ADDR1) / 4;
return piscsi_u32[i];
break;
}
case PISCSI_CMD_DRVTYPE:
if (devs[piscsi_cur_drive].fd == -1) {
DEBUG("[PISCSI] %s Read from DRVTYPE %d, drive not attached.\n", op_type_names[type], piscsi_cur_drive);
return 0;
}
DEBUG("[PISCSI] %s Read from DRVTYPE %d, drive attached.\n", op_type_names[type], piscsi_cur_drive);
return 1;
break;
case PISCSI_CMD_DRVNUM:
return piscsi_cur_drive;
break;
case PISCSI_CMD_CYLS:
DEBUG("[PISCSI] %s Read from CYLS %d: %d\n", op_type_names[type], piscsi_cur_drive, devs[piscsi_cur_drive].c);
return devs[piscsi_cur_drive].c;
break;
case PISCSI_CMD_HEADS:
DEBUG("[PISCSI] %s Read from HEADS %d: %d\n", op_type_names[type], piscsi_cur_drive, devs[piscsi_cur_drive].h);
return devs[piscsi_cur_drive].h;
break;
case PISCSI_CMD_SECS:
DEBUG("[PISCSI] %s Read from SECS %d: %d\n", op_type_names[type], piscsi_cur_drive, devs[piscsi_cur_drive].s);
return devs[piscsi_cur_drive].s;
break;
case PISCSI_CMD_BLOCKS: {
uint32_t blox = devs[piscsi_cur_drive].fs / 512;
DEBUG("[PISCSI] %s Read from BLOCKS %d: %d\n", op_type_names[type], piscsi_cur_drive, (uint32_t)(devs[piscsi_cur_drive].fs / 512));
DEBUG("fs: %lld (%d)\n", devs[piscsi_cur_drive].fs, blox);
return blox;
break;
}
case PISCSI_CMD_GETPART: {
DEBUG("[PISCSI] Get ROM partition %d offset: %.8X\n", rom_cur_partition, rom_partitions[rom_cur_partition]);
return rom_partitions[rom_cur_partition];
break;
}
case PISCSI_CMD_GETPRIO:
DEBUG("[PISCSI] Get partition %d boot priority: %d\n", rom_cur_partition, rom_partition_prio[rom_cur_partition]);
return rom_partition_prio[rom_cur_partition];
break;
case PISCSI_CMD_CHECKFS:
DEBUG("[PISCSI] Get current loaded file system: %.8X\n", filesystems[rom_cur_fs].FS_ID);
return filesystems[rom_cur_fs].FS_ID;
case PISCSI_CMD_FSSIZE:
DEBUG("[PISCSI] Get alloc size of loaded file system: %d\n", filesystems[rom_cur_fs].h_info.alloc_size);
return filesystems[rom_cur_fs].h_info.alloc_size;
default:
DEBUG("[!!!PISCSI] WARN: Unhandled %s register read from %.8X\n", op_type_names[type], addr);
break;
}
return 0;
}
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