From 1e50f05b17adcc929367f95bb63e26f8784646ce Mon Sep 17 00:00:00 2001 From: notaz Date: Thu, 17 Aug 2023 22:49:26 +0300 Subject: [PATCH] psxbios: remove some globals --- libpcsxcore/psxbios.c | 185 ++++++++++++++++++------------------------ 1 file changed, 77 insertions(+), 108 deletions(-) diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c index be3bc844..678377e1 100644 --- a/libpcsxcore/psxbios.c +++ b/libpcsxcore/psxbios.c @@ -253,11 +253,11 @@ typedef struct { u32 mcfile; } FileDesc; -static u32 heap_size = 0; -static u32 *heap_addr = NULL; -static u32 *heap_end = NULL; +// todo: FileDesc layout is wrong +// todo: get rid of these globals static FileDesc FDesc[32]; -static u32 card_active_chan = 0; +static char ffile[64], *pfile; +static int nfile; // fixed RAM offsets, SCPH1001 compatible #define A_TT_ExCB 0x0100 @@ -282,12 +282,17 @@ static u32 card_active_chan = 0; #define A_PAD_IN_LEN 0x74d8 #define A_PAD_OUT_LEN 0x74e0 #define A_PAD_DR_DST 0x74c4 +#define A_CARD_CHAN1 0x7500 #define A_PAD_DR_BUF1 0x7570 #define A_PAD_DR_BUF2 0x7598 #define A_EEXIT_PTR 0x75d0 #define A_EXC_STACK 0x85d8 // exception stack top #define A_RCNT_VBL_ACK 0x8600 #define A_PAD_ACK_VBL 0x8914 // enable vint ack by pad reading code +#define A_HEAP_BASE 0x9000 +#define A_HEAP_SIZE 0x9004 +#define A_HEAP_END 0x9008 +#define A_HEAP_FLAG 0x900c #define A_CD_EVENTS 0xb9b8 #define A_EXC_GP 0xf450 @@ -912,24 +917,20 @@ void psxBios_bcopy() { // 0x27 pc0 = ra; } -void psxBios_bzero() { // 0x28 - char *p = (char *)Ra0; - v0 = a0; +static void psxBios_bzero() { // 0x28 /* Same as memset here (See memset below) */ - if (a1 > 0x7FFFFFFF || a1 == 0) + u32 ret = a0; + if (a0 == 0 || (s32)a1 <= 0) { - v0 = 0; - pc0 = ra; + mips_return_c(0, 6); return; } - else if (a0 == 0) - { - pc0 = ra; - return; + while ((s32)a1-- > 0) { + storeRam8(a0++, 0); + use_cycles(4); } - while ((s32)a1-- > 0) *p++ = '\0'; - a1 = 0; - pc0 = ra; + // todo: many more cycles due to uncached bios mem + mips_return_c(ret, 5); } void psxBios_bcmp() { // 0x29 @@ -963,23 +964,19 @@ void psxBios_memcpy() { // 0x2a pc0 = ra; } -void psxBios_memset() { // 0x2b - char *p = (char *)Ra0; - v0 = a0; - if (a2 > 0x7FFFFFFF || a2 == 0) +static void psxBios_memset() { // 0x2b + u32 ret = a0; + if (a0 == 0 || (s32)a2 <= 0) { - v0 = 0; - pc0 = ra; + mips_return_c(0, 6); return; } - if (a0 == 0) - { - pc0 = ra; - return; + while ((s32)a2-- > 0) { + storeRam8(a0++, a1); + use_cycles(4); } - while ((s32)a2-- > 0) *p++ = (char)a1; - a2 = 0; - v0 = a0; pc0 = ra; + // todo: many more cycles due to uncached bios mem + mips_return_c(ret, 5); } void psxBios_memmove() { // 0x2c @@ -1142,14 +1139,16 @@ void psxBios_qsort() { // 0x31 pc0 = ra; } -void psxBios_malloc() { // 0x33 +// this isn't how the real bios works, but maybe good enough +static void psxBios_malloc() { // 0x33 + u32 *heap_addr, *heap_end; u32 *chunk, *newchunk = NULL; unsigned int dsize = 0, csize, cstat; int colflag; -#ifdef PSXBIOS_LOG - PSXBIOS_LOG("psxBios_%s\n", biosA0n[0x33]); -#endif - if (!a0 || (!heap_size || !heap_addr)) { + 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; @@ -1246,27 +1245,24 @@ void psxBios_malloc() { // 0x33 pc0 = ra; } -void psxBios_free() { // 0x34 - - PSXBIOS_LOG("psxBios_%s\n", biosA0n[0x34]); - PSXBIOS_LOG("free %x: %x bytes\n", a0, *(u32*)(Ra0-4)); - - if (a0) - *(u32*)(Ra0-4) |= 1; // set chunk to free - pc0 = ra; +static void psxBios_free() { // 0x34 + PSXBIOS_LOG("psxBios_%s %x (%x bytes)\n", biosA0n[0x34], a0, loadRam32(a0 - 4)); + storeRam32(a0 - 4, loadRam32(a0 - 4) | 1); // set chunk to free + mips_return_void_c(5); } -void psxBios_calloc() { // 0x37 - void *pv0; -#ifdef PSXBIOS_LOG - PSXBIOS_LOG("psxBios_%s\n", biosA0n[0x37]); -#endif +static void psxBios_calloc() { // 0x37 + u32 ret, size; + PSXBIOS_LOG("psxBios_%s %x %x\n", biosA0n[0x37], a0, a1); - a0 = a0 * a1; + a0 = size = a0 * a1; psxBios_malloc(); - pv0 = Rv0; - if (pv0) - memset(pv0, 0, a0); + ret = v0; + if (ret) { + a0 = ret; a1 = size; + psxBios_bzero(); + } + mips_return_c(ret, 21); } void psxBios_realloc() { // 0x38 @@ -1299,27 +1295,16 @@ void psxBios_realloc() { // 0x38 /* InitHeap(void *block , int n) */ -void psxBios_InitHeap() { // 0x39 - unsigned int size; - -#ifdef PSXBIOS_LOG - PSXBIOS_LOG("psxBios_%s\n", biosA0n[0x39]); -#endif - - if (((a0 & 0x1fffff) + a1)>= 0x200000) size = 0x1ffffc - (a0 & 0x1fffff); - else size = a1; +static void psxBios_InitHeap() { // 0x39 + PSXBIOS_LOG("psxBios_%s %x %x\n", biosA0n[0x39], a0, a1); - size &= 0xfffffffc; + storeRam32(A_HEAP_BASE, a0); + storeRam32(A_HEAP_SIZE, a1); + storeRam32(A_HEAP_END, a0 + (a1 & ~3) + 4); + storeRam32(A_HEAP_FLAG, 0); + storeRam32(a0, 0); - heap_addr = (u32 *)Ra0; - heap_size = size; - heap_end = (u32 *)((u8 *)heap_addr + heap_size); - /* HACKFIX: Commenting out this line fixes GTA2 crash */ - //*heap_addr = SWAP32(size | 1); - - PSXBIOS_LOG("InitHeap %x,%x : %x %x\n",a0,a1, (int)((uptr)heap_addr-(uptr)psxM), size); - - pc0 = ra; + mips_return_void_c(14); } void psxBios_getchar() { //0x3b @@ -1685,19 +1670,18 @@ void psxBios_SetMem() { // 9f } /* TODO FIXME : Not compliant. -1 indicates failure but using 1 for now. */ -void psxBios_get_cd_status(void) //a6 +static void psxBios_get_cd_status() // a6 { + PSXBIOS_LOG("psxBios_%s\n", biosA0n[0xa6]); v0 = 1; pc0 = ra; } -void psxBios__card_info() { // ab -#ifdef PSXBIOS_LOG +static void psxBios__card_info() { // ab PSXBIOS_LOG("psxBios_%s: %x\n", biosA0n[0xab], a0); -#endif u32 ret, port; - card_active_chan = a0; - port = card_active_chan >> 4; + storeRam32(A_CARD_CHAN1, a0); + port = a0 >> 4; switch (port) { case 0x0: @@ -1707,9 +1691,7 @@ void psxBios__card_info() { // ab ret = 0x0100; break; default: -#ifdef PSXBIOS_LOG - PSXBIOS_LOG("psxBios_%s: UNKNOWN PORT 0x%x\n", biosA0n[0xab], card_active_chan); -#endif + PSXBIOS_LOG("psxBios_%s: UNKNOWN PORT 0x%x\n", biosA0n[0xab], a0); ret = 0x0302; break; } @@ -1728,7 +1710,7 @@ void psxBios__card_load() { // ac PSXBIOS_LOG("psxBios_%s: %x\n", biosA0n[0xac], a0); #endif - card_active_chan = a0; + storeRam32(A_CARD_CHAN1, a0); // DeliverEvent(0xf0000011, 0x0004); DeliverEvent(0xf4000001, 0x0004); @@ -2221,9 +2203,6 @@ static void psxBios_UnDeliverEvent() { // 0x20 mips_return(ret); } -char ffile[64], *pfile; -int nfile; - static void buopen(int mcd, char *ptr, char *cfg) { int i; @@ -2683,7 +2662,7 @@ void psxBios__card_write() { // 0x4e v0 = 0; pc0 = ra; return; } - card_active_chan = a0; + storeRam32(A_CARD_CHAN1, a0); port = a0 >> 4; if (pa2 != INVALID_PTR) { @@ -2719,7 +2698,7 @@ void psxBios__card_read() { // 0x4f v0 = 0; pc0 = ra; return; } - card_active_chan = a0; + storeRam32(A_CARD_CHAN1, a0); port = a0 >> 4; if (pa2 != INVALID_PTR) { @@ -2810,13 +2789,14 @@ void psxBios_GetB0Table() { // 57 mips_return_c(A_B0_TABLE, 3); } -void psxBios__card_chan() { // 0x58 -#ifdef PSXBIOS_LOG +static void psxBios__card_chan() { // 0x58 + u32 ret; PSXBIOS_LOG("psxBios_%s\n", biosB0n[0x58]); -#endif - v0 = card_active_chan; - pc0 = ra; + // todo: should return active slot chan + // (active - which was last processed by irq code) + ret = loadRam32(A_CARD_CHAN1); + mips_return_c(ret, 8); } static void psxBios_ChangeClearPad() { // 5b @@ -2828,21 +2808,17 @@ static void psxBios_ChangeClearPad() { // 5b mips_return_c(ret, 6); } -void psxBios__card_status() { // 5c -#ifdef PSXBIOS_LOG - PSXBIOS_LOG("psxBios_%s: %x\n", biosB0n[0x5c], a0); -#endif +static void psxBios__card_status() { // 5c + PSXBIOS_LOG("psxBios_%s %x\n", biosB0n[0x5c], a0); - v0 = card_active_chan; + v0 = 1; // ready pc0 = ra; } -void psxBios__card_wait() { // 5d -#ifdef PSXBIOS_LOG - PSXBIOS_LOG("psxBios_%s: %x\n", biosB0n[0x5d], a0); -#endif +static void psxBios__card_wait() { // 5d + PSXBIOS_LOG("psxBios_%s %x\n", biosB0n[0x5d], a0); - v0 = 1; + v0 = 1; // ready pc0 = ra; } @@ -3523,11 +3499,7 @@ void psxBiosInit() { //************** THE END *************************************** /**/ - heap_addr = NULL; - heap_end = NULL; - heap_size = 0; memset(FDesc, 0, sizeof(FDesc)); - card_active_chan = 0; // initial RNG seed psxMu32ref(0x9010) = SWAPu32(0xac20cc00); @@ -3945,8 +3917,5 @@ void psxBiosException() { void psxBiosFreeze(int Mode) { u32 base = 0x40000; - bfreezepsxMptr(heap_addr, u32); bfreezes(FDesc); - bfreezel(&card_active_chan); - bfreezel(&heap_size); } -- 2.39.2