/***************************************************************************
* Copyright (C) 2019 Ryan Schultz, PCSX-df Team, PCSX team, gameblabla, *
- * dmitrysmagin, senquack *
+ * dmitrysmagin, senquack *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
#include "psxinterpreter.h"
#include <zlib.h>
-#if (defined(__GNUC__) && __GNUC__ >= 5) || defined(__clang__)
-#pragma GCC diagnostic ignored "-Wpointer-sign"
-#endif
-
#ifndef PSXBIOS_LOG
//#define PSXBIOS_LOG printf
#define PSXBIOS_LOG(...)
static FileDesc FDesc[32];
static char ffile[64];
static int nfile;
+static char cdir[8*8+8];
+static u32 floodchk;
// fixed RAM offsets, SCPH1001 compatible
#define A_TT_ExCB 0x0100
#define A_HEAP_BASE 0x9000
#define A_HEAP_SIZE 0x9004
#define A_HEAP_END 0x9008
-#define A_HEAP_FLAG 0x900c
+#define A_HEAP_INIT_FLG 0x900c
#define A_RND_SEED 0x9010
+#define A_HEAP_FRSTCHNK 0xb060
+#define A_HEAP_CURCHNK 0xb064
#define A_CONF_TCB 0xb940
#define A_CONF_EvCB 0xb944
#define A_CONF_SP 0xb948
pc0 = ra;
}
-// this isn't how the real bios works, but maybe good enough
+static int malloc_heap_grow(u32 size) {
+ u32 heap_addr, heap_end, heap_addr_new;
+
+ heap_addr = loadRam32(A_HEAP_BASE);
+ heap_end = loadRam32(A_HEAP_END);
+ heap_addr_new = heap_addr + 4 + size;
+ if (heap_addr_new >= heap_end)
+ return -1;
+ storeRam32(A_HEAP_BASE, heap_addr_new);
+ storeRam32(heap_addr - 4, size | 1);
+ storeRam32(heap_addr + size, ~1); // terminator
+ return 0;
+}
+
static void psxBios_malloc() { // 0x33
- u32 *heap_addr, *heap_end;
- u32 *chunk, *newchunk = NULL;
- unsigned int dsize = 0, csize, cstat;
- int colflag;
- PSXBIOS_LOG("psxBios_%s %x\n", biosA0n[0x33], a0);
- heap_addr = loadRam32ptr(A_HEAP_BASE);
- heap_end = loadRam32ptr(A_HEAP_END);
- if (heap_addr >= heap_end) {
- v0 = 0;
- pc0 = ra;
- return;
- }
+ u32 size = (a0 + 3) & ~3;
+ u32 limit = 32*1024;
+ u32 tries = 2, i;
+ u32 ret;
- // scan through heap and combine free chunks of space
- chunk = heap_addr;
- colflag = 0;
- while(chunk < heap_end) {
- // get size and status of actual chunk
- csize = ((u32)*chunk) & 0xfffffffc;
- cstat = ((u32)*chunk) & 1;
-
- // most probably broken heap descriptor
- // this fixes Burning Road
- if (*chunk == 0) {
- newchunk = chunk;
- dsize = ((uptr)heap_end - (uptr)chunk) - 4;
- colflag = 1;
- break;
+ PSXBIOS_LOG("psxBios_%s %d\n", biosA0n[0x33], a0);
+
+ if (!loadRam32(A_HEAP_INIT_FLG)) {
+ u32 heap_addr = loadRam32(A_HEAP_BASE);
+ storeRam32(heap_addr, ~1);
+ storeRam32(A_HEAP_FRSTCHNK, heap_addr);
+ storeRam32(A_HEAP_CURCHNK, heap_addr);
+ storeRam32(A_HEAP_BASE, heap_addr + 4);
+ if (malloc_heap_grow(size)) {
+ PSXBIOS_LOG("malloc: init OOM\n");
+ mips_return_c(0, 20);
+ return;
}
+ storeRam32(A_HEAP_INIT_FLG, 1);
+ }
- // it's a free chunk
- if(cstat == 1) {
- if(colflag == 0) {
- newchunk = chunk;
- dsize = csize;
- colflag = 1; // let's begin a new collection of free memory
+ for (i = 0; tries > 0 && i < limit; i++)
+ {
+ u32 chunk = loadRam32(A_HEAP_CURCHNK);
+ u32 chunk_hdr = loadRam32(chunk);
+ u32 next_chunk = chunk + 4 + (chunk_hdr & ~3);
+ u32 next_chunk_hdr = loadRam32(next_chunk);
+ use_cycles(20);
+ //printf(" c %08x %08x\n", chunk, chunk_hdr);
+ if (chunk_hdr & 1) {
+ // free chunk
+ if (chunk_hdr > (size | 1)) {
+ // split
+ u32 p2size = (chunk_hdr & ~3) - size - 4;
+ storeRam32(chunk + 4 + size, p2size | 1);
+ chunk_hdr = size | 1;
+ }
+ if (chunk_hdr == (size | 1)) {
+ storeRam32(chunk, size);
+ break;
+ }
+ // chunk too small
+ if (next_chunk_hdr & 1) {
+ // merge
+ u32 msize = (chunk_hdr & ~3) + 4 + (next_chunk_hdr & ~3);
+ storeRam32(chunk, msize | 1);
+ continue;
}
- else dsize += (csize+4); // add the new size including header
}
- // not a free chunk: did we start a collection ?
+ if (chunk_hdr == ~1) {
+ // last chunk
+ if (tries == 2)
+ storeRam32(A_HEAP_CURCHNK, loadRam32(A_HEAP_FRSTCHNK));
+ tries--;
+ }
else {
- if(colflag == 1) { // collection is over
- colflag = 0;
- *newchunk = SWAP32(dsize | 1);
- }
+ // go to the next chunk
+ storeRam32(A_HEAP_CURCHNK, next_chunk);
}
-
- // next chunk
- chunk = (u32*)((uptr)chunk + csize + 4);
- }
- // if neccessary free memory on end of heap
- if (colflag == 1)
- *newchunk = SWAP32(dsize | 1);
-
- chunk = heap_addr;
- csize = ((u32)*chunk) & 0xfffffffc;
- cstat = ((u32)*chunk) & 1;
- dsize = (a0 + 3) & 0xfffffffc;
-
- // exit on uninitialized heap
- if (chunk == NULL) {
- printf("malloc %x,%x: Uninitialized Heap!\n", v0, a0);
- v0 = 0;
- pc0 = ra;
- return;
}
- // search an unused chunk that is big enough until the end of the heap
- while ((dsize > csize || cstat==0) && chunk < heap_end ) {
- chunk = (u32*)((uptr)chunk + csize + 4);
-
- // catch out of memory
- if(chunk >= heap_end) {
- printf("malloc %x,%x: Out of memory error!\n",
- v0, a0);
- v0 = 0; pc0 = ra;
- return;
- }
-
- csize = ((u32)*chunk) & 0xfffffffc;
- cstat = ((u32)*chunk) & 1;
+ if (i == limit)
+ ret = 0;
+ else if (tries == 0 && malloc_heap_grow(size))
+ ret = 0;
+ else {
+ u32 chunk = loadRam32(A_HEAP_CURCHNK);
+ storeRam32(chunk, loadRam32(chunk) & ~3);
+ ret = chunk + 4;
}
- // allocate memory
- if(dsize == csize) {
- // chunk has same size
- *chunk &= 0xfffffffc;
- } else if (dsize > csize) {
- v0 = 0; pc0 = ra;
- return;
- } else {
- // split free chunk
- *chunk = SWAP32(dsize);
- newchunk = (u32*)((uptr)chunk + dsize + 4);
- *newchunk = SWAP32(((csize - dsize - 4) & 0xfffffffc) | 1);
- }
-
- // return pointer to allocated memory
- v0 = ((uptr)chunk - (uptr)psxM) + 4;
- v0|= 0x80000000;
- //printf ("malloc %x,%x\n", v0, a0);
- pc0 = ra;
+ PSXBIOS_LOG(" -> %08x\n", ret);
+ mips_return_c(ret, 40);
}
static void psxBios_free() { // 0x34
- PSXBIOS_LOG("psxBios_%s %x (%x bytes)\n", biosA0n[0x34], a0, loadRam32(a0 - 4));
+ PSXBIOS_LOG("psxBios_%s %x (%d bytes)\n", biosA0n[0x34], a0, loadRam32(a0 - 4));
storeRam32(a0 - 4, loadRam32(a0 - 4) | 1); // set chunk to free
mips_return_void_c(5);
}
storeRam32(A_HEAP_BASE, a0);
storeRam32(A_HEAP_SIZE, a1);
storeRam32(A_HEAP_END, a0 + (a1 & ~3) + 4);
- storeRam32(A_HEAP_FLAG, 0);
+ storeRam32(A_HEAP_INIT_FLG, 0);
storeRam32(a0, 0);
mips_return_void_c(14);
pc0 = ra;
}
-void psxBios_format() { // 0x41
+static void psxBios_cd() { // 0x40
+ const char *p, *dir = castRam8ptr(a0);
+ PSXBIOS_LOG("psxBios_%s %x(%s)\n", biosB0n[0x40], a0, dir);
+ if ((p = strchr(dir, ':')))
+ dir = ++p;
+ if (*dir == '\\')
+ dir++;
+ snprintf(cdir, sizeof(cdir), "%s", dir);
+ mips_return_c(1, 100);
+}
+
+static void psxBios_format() { // 0x41
+ PSXBIOS_LOG("psxBios_%s %x(%s)\n", biosB0n[0x41], a0, Ra0);
if (strcmp(Ra0, "bu00:") == 0 && Config.Mcd1[0] != '\0')
{
CreateMcd(Config.Mcd1);
}
static void psxBios_SystemErrorUnresolvedException() {
- if (loadRam32(0xfffc) != 0x12345678) { // prevent log flood
+ if (floodchk != 0x12340a40) { // prevent log flood
SysPrintf("psxBios_%s called from %08x\n", biosA0n[0x40], ra);
- storeRam32(0xfffc, 0x12345678);
+ floodchk = 0x12340a40;
}
mips_return_void_c(1000);
}
void psxBios_Load() { // 0x42
EXE_HEADER eheader;
+ char path[256];
+ char *pa0, *p;
void *pa1;
+ pa0 = Ra0;
pa1 = Ra1;
- if (pa1 != INVALID_PTR && LoadCdromFile(Ra0, &eheader) == 0) {
+ PSXBIOS_LOG("psxBios_%s %x(%s), %x\n", biosA0n[0x42], a0, pa0, a1);
+ if (pa0 == INVALID_PTR || pa1 == INVALID_PTR) {
+ mips_return(0);
+ return;
+ }
+ if ((p = strchr(pa0, ':')))
+ pa0 = ++p;
+ if (*pa0 == '\\')
+ pa0++;
+ if (cdir[0])
+ snprintf(path, sizeof(path), "%s\\%s", cdir, (char *)pa0);
+ else
+ snprintf(path, sizeof(path), "%s", (char *)pa0);
+
+ if (LoadCdromFile(path, &eheader) == 0) {
memcpy(pa1, ((char*)&eheader)+16, sizeof(EXEC));
psxCpu->Clear(a1, sizeof(EXEC) / 4);
FlushCache();
v0 = 1;
} else v0 = 0;
- PSXBIOS_LOG("psxBios_%s: %s, %d -> %d\n", biosA0n[0x42], Ra0, a1, v0);
+ PSXBIOS_LOG(" -> %d\n", v0);
pc0 = ra;
}
}
}
}
+ floodchk = 0;
use_cycles(29);
return ret;
}
u32 base = loadRam32(A_TT_EvCB);
u32 status = loadRam32(base + (a0 & 0xffff) * sizeof(EvCB) + 4);
u32 ret = 0;
- PSXBIOS_LOG("psxBios_%s %x %x\n", biosB0n[0x0b], a0, status);
+
+ if (psxRegs.cycle - floodchk > 16*1024u) { // prevent log flood
+ PSXBIOS_LOG("psxBios_%s %x %x\n", biosB0n[0x0b], a0, status);
+ floodchk = psxRegs.cycle;
+ }
if (status == EvStALREADY) {
storeRam32(base + (a0 & 0xffff) * sizeof(EvCB) + 4, EvStACTIVE);
ret = 1;
}
for (; nfile <= 15; nfile++, blocks++) {
const u8 *data2 = mcd_data + 128 * nfile;
- const char *name = data2 + 0x0a;
+ const char *name = (const char *)data2 + 0x0a;
if ((data2[0] & 0xF0) != 0x50 || name[0])
break;
}
if (!strncmp(pa0, "bu00", 4)) {
// firstfile() calls _card_read() internally, so deliver it's event
DeliverEvent(0xf0000011, 0x0004);
- bufile(Mcd1Data, a1);
+ bufile((u8 *)Mcd1Data, a1);
} else if (!strncmp(pa0, "bu10", 4)) {
// firstfile() calls _card_read() internally, so deliver it's event
DeliverEvent(0xf0000011, 0x0004);
- bufile(Mcd2Data, a1);
+ bufile((u8 *)Mcd2Data, a1);
}
}
v0 = 0;
if (!strncmp(ffile, "bu00", 4))
- bufile(Mcd1Data, a0);
+ bufile((u8 *)Mcd1Data, a0);
else if (!strncmp(ffile, "bu10", 4))
- bufile(Mcd2Data, a0);
+ bufile((u8 *)Mcd2Data, a0);
pc0 = ra;
}
void psxBiosInit() {
u32 *ptr, *ram32, *rom32;
+ char *romc;
int i;
uLongf len;
biosB0[0x3d] = psxBios_putchar;
//biosB0[0x3e] = psxBios_gets;
biosB0[0x3f] = psxBios_puts;
- //biosB0[0x40] = psxBios_cd;
+ biosB0[0x40] = psxBios_cd;
biosB0[0x41] = psxBios_format;
biosB0[0x42] = psxBios_firstfile;
biosB0[0x43] = psxBios_nextfile;
/**/
memset(FDesc, 0, sizeof(FDesc));
+ memset(cdir, 0, sizeof(cdir));
+ floodchk = 0;
// somewhat pretend to be a SCPH1001 BIOS
// some games look for these and take an exception if they're missing
rom32 = (u32 *)psxR;
rom32[0x100/4] = SWAP32(0x19951204);
rom32[0x104/4] = SWAP32(3);
- strcpy(psxR + 0x108, "PCSX authors");
- strcpy(psxR + 0x12c, "CEX-3000 PCSX HLE"); // see psxBios_GetSystemInfo
- strcpy(psxR + 0x7ff32, "System ROM Version 2.2 12/04/95 A");
- strcpy(psxR + 0x7ff54, "GPL-2.0-or-later");
+ romc = (char *)psxR;
+ strcpy(romc + 0x108, "PCSX authors");
+ strcpy(romc + 0x12c, "CEX-3000 PCSX HLE"); // see psxBios_GetSystemInfo
+ strcpy(romc + 0x7ff32, "System ROM Version 2.2 12/04/95 A");
+ strcpy(romc + 0x7ff54, "GPL-2.0-or-later");
// fonts
len = 0x80000 - 0x66000;
}
#define psxBios_PADpoll(pad) { \
+ int i, more_data = 0; \
PAD##pad##_startPoll(pad); \
- pad_buf##pad[0] = 0; \
- pad_buf##pad[1] = PAD##pad##_poll(0x42); \
- if (!(pad_buf##pad[1] & 0x0f)) { \
- bufcount = 32; \
- } else { \
- bufcount = (pad_buf##pad[1] & 0x0f) * 2; \
- } \
- PAD##pad##_poll(0); \
+ pad_buf##pad[1] = PAD##pad##_poll(0x42, &more_data); \
+ pad_buf##pad[0] = more_data ? 0 : 0xff; \
+ PAD##pad##_poll(0, &more_data); \
i = 2; \
- while (bufcount--) { \
- pad_buf##pad[i++] = PAD##pad##_poll(0); \
+ while (more_data) { \
+ pad_buf##pad[i++] = PAD##pad##_poll(0, &more_data); \
} \
}
if (loadRam32(A_PAD_IRQR_ENA)) {
u8 *pad_buf1 = loadRam8ptr(A_PAD_INBUF + 0);
u8 *pad_buf2 = loadRam8ptr(A_PAD_INBUF + 4);
- int i, bufcount;
psxBios_PADpoll(1);
psxBios_PADpoll(2);
int i;
// save the regs
- // $at, $v0, $v1 already saved by the mips code at A_EXCEPTION
- for (i = 4; i < 32; i++) {
+ // $at, $v0, $v1, $ra already saved by the mips code at A_EXCEPTION
+ for (i = 4; i < 31; i++) {
if (i == 26) // $k0
continue;
tcb->reg[i] = SWAP32(psxRegs.GPR.r[i]);
bfreezes(FDesc);
bfreezes(ffile);
bfreezel(&nfile);
+ bfreezes(cdir);
}
notaz.gp2x.de / pcsx_rearmed.git / blobdiff