[pcsx_rearmed.git] / libpcsxcore / lightrec / plugin.c

#include <lightrec.h>
#include <stdbool.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>

#include "../cdrom.h"
#include "../gpu.h"
#include "../gte.h"
#include "../mdec.h"
#include "../psxdma.h"
#include "../psxhw.h"
#include "../psxmem.h"
#include "../r3000a.h"

#include "../frontend/main.h"

#include "mem.h"
#include "plugin.h"

#if (defined(__arm__) || defined(__aarch64__)) && !defined(ALLOW_LIGHTREC_ON_ARM)
#error "Lightrec should not be used on ARM (please specify DYNAREC=ari64 to make)"
#endif

#define ARRAY_SIZE(x) (sizeof(x) ? sizeof(x) / sizeof((x)[0]) : 0)

#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#	define LE32TOH(x)	__builtin_bswap32(x)
#	define HTOLE32(x)	__builtin_bswap32(x)
#	define LE16TOH(x)	__builtin_bswap16(x)
#	define HTOLE16(x)	__builtin_bswap16(x)
#else
#	define LE32TOH(x)	(x)
#	define HTOLE32(x)	(x)
#	define LE16TOH(x)	(x)
#	define HTOLE16(x)	(x)
#endif

#ifdef __GNUC__
#	define likely(x)       __builtin_expect(!!(x),1)
#	define unlikely(x)     __builtin_expect(!!(x),0)
#else
#	define likely(x)       (x)
#	define unlikely(x)     (x)
#endif

psxRegisters psxRegs;
Rcnt rcnts[4];

static struct lightrec_state *lightrec_state;

static char *name = "retroarch.exe";

static bool use_lightrec_interpreter;
static bool use_pcsx_interpreter;
static bool booting;
static u32 lightrec_begin_cycles;

enum my_cp2_opcodes {
	OP_CP2_RTPS		= 0x01,
	OP_CP2_NCLIP		= 0x06,
	OP_CP2_OP		= 0x0c,
	OP_CP2_DPCS		= 0x10,
	OP_CP2_INTPL		= 0x11,
	OP_CP2_MVMVA		= 0x12,
	OP_CP2_NCDS		= 0x13,
	OP_CP2_CDP		= 0x14,
	OP_CP2_NCDT		= 0x16,
	OP_CP2_NCCS		= 0x1b,
	OP_CP2_CC		= 0x1c,
	OP_CP2_NCS		= 0x1e,
	OP_CP2_NCT		= 0x20,
	OP_CP2_SQR		= 0x28,
	OP_CP2_DCPL		= 0x29,
	OP_CP2_DPCT		= 0x2a,
	OP_CP2_AVSZ3		= 0x2d,
	OP_CP2_AVSZ4		= 0x2e,
	OP_CP2_RTPT		= 0x30,
	OP_CP2_GPF		= 0x3d,
	OP_CP2_GPL		= 0x3e,
	OP_CP2_NCCT		= 0x3f,
};

static void (*cp2_ops[])(struct psxCP2Regs *) = {
	[OP_CP2_RTPS] = gteRTPS,
	[OP_CP2_RTPS] = gteRTPS,
	[OP_CP2_NCLIP] = gteNCLIP,
	[OP_CP2_OP] = gteOP,
	[OP_CP2_DPCS] = gteDPCS,
	[OP_CP2_INTPL] = gteINTPL,
	[OP_CP2_MVMVA] = gteMVMVA,
	[OP_CP2_NCDS] = gteNCDS,
	[OP_CP2_CDP] = gteCDP,
	[OP_CP2_NCDT] = gteNCDT,
	[OP_CP2_NCCS] = gteNCCS,
	[OP_CP2_CC] = gteCC,
	[OP_CP2_NCS] = gteNCS,
	[OP_CP2_NCT] = gteNCT,
	[OP_CP2_SQR] = gteSQR,
	[OP_CP2_DCPL] = gteDCPL,
	[OP_CP2_DPCT] = gteDPCT,
	[OP_CP2_AVSZ3] = gteAVSZ3,
	[OP_CP2_AVSZ4] = gteAVSZ4,
	[OP_CP2_RTPT] = gteRTPT,
	[OP_CP2_GPF] = gteGPF,
	[OP_CP2_GPL] = gteGPL,
	[OP_CP2_NCCT] = gteNCCT,
};

static char cache_buf[64 * 1024];

static void cop2_op(struct lightrec_state *state, u32 func)
{
	struct lightrec_registers *regs = lightrec_get_registers(state);

	psxRegs.code = func;

	if (unlikely(!cp2_ops[func & 0x3f])) {
		fprintf(stderr, "Invalid CP2 function %u\n", func);
	} else {
		/* This works because regs->cp2c comes right after regs->cp2d,
		 * so it can be cast to a pcsxCP2Regs pointer. */
		cp2_ops[func & 0x3f]((psxCP2Regs *) regs->cp2d);
	}
}

static bool has_interrupt(void)
{
	struct lightrec_registers *regs = lightrec_get_registers(lightrec_state);

	return ((psxHu32(0x1070) & psxHu32(0x1074)) &&
		(regs->cp0[12] & 0x401) == 0x401) ||
		(regs->cp0[12] & regs->cp0[13] & 0x0300);
}

static void lightrec_restore_state(struct lightrec_state *state)
{
	lightrec_reset_cycle_count(state, psxRegs.cycle);

	if (booting || has_interrupt())
		lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
	else
		lightrec_set_target_cycle_count(state, next_interupt);
}

static void hw_write_byte(struct lightrec_state *state,
			  u32 op, void *host, u32 mem, u8 val)
{
	psxRegs.cycle = lightrec_current_cycle_count(state);

	psxHwWrite8(mem, val);

	lightrec_restore_state(state);
}

static void hw_write_half(struct lightrec_state *state,
			  u32 op, void *host, u32 mem, u16 val)
{
	psxRegs.cycle = lightrec_current_cycle_count(state);

	psxHwWrite16(mem, val);

	lightrec_restore_state(state);
}

static void hw_write_word(struct lightrec_state *state,
			  u32 op, void *host, u32 mem, u32 val)
{
	psxRegs.cycle = lightrec_current_cycle_count(state);

	psxHwWrite32(mem, val);

	lightrec_restore_state(state);
}

static u8 hw_read_byte(struct lightrec_state *state, u32 op, void *host, u32 mem)
{
	u8 val;

	psxRegs.cycle = lightrec_current_cycle_count(state);

	val = psxHwRead8(mem);

	lightrec_restore_state(state);

	return val;
}

static u16 hw_read_half(struct lightrec_state *state,
			u32 op, void *host, u32 mem)
{
	u16 val;

	psxRegs.cycle = lightrec_current_cycle_count(state);

	val = psxHwRead16(mem);

	lightrec_restore_state(state);

	return val;
}

static u32 hw_read_word(struct lightrec_state *state,
			u32 op, void *host, u32 mem)
{
	u32 val;

	psxRegs.cycle = lightrec_current_cycle_count(state);

	val = psxHwRead32(mem);

	lightrec_restore_state(state);

	return val;
}

static struct lightrec_mem_map_ops hw_regs_ops = {
	.sb = hw_write_byte,
	.sh = hw_write_half,
	.sw = hw_write_word,
	.lb = hw_read_byte,
	.lh = hw_read_half,
	.lw = hw_read_word,
};

static u32 cache_ctrl;

static void cache_ctrl_write_word(struct lightrec_state *state,
				  u32 op, void *host, u32 mem, u32 val)
{
	cache_ctrl = val;
}

static u32 cache_ctrl_read_word(struct lightrec_state *state,
				u32 op, void *host, u32 mem)
{
	return cache_ctrl;
}

static struct lightrec_mem_map_ops cache_ctrl_ops = {
	.sw = cache_ctrl_write_word,
	.lw = cache_ctrl_read_word,
};

static struct lightrec_mem_map lightrec_map[] = {
	[PSX_MAP_KERNEL_USER_RAM] = {
		/* Kernel and user memory */
		.pc = 0x00000000,
		.length = 0x200000,
	},
	[PSX_MAP_BIOS] = {
		/* BIOS */
		.pc = 0x1fc00000,
		.length = 0x80000,
	},
	[PSX_MAP_SCRATCH_PAD] = {
		/* Scratch pad */
		.pc = 0x1f800000,
		.length = 0x400,
	},
	[PSX_MAP_PARALLEL_PORT] = {
		/* Parallel port */
		.pc = 0x1f000000,
		.length = 0x10000,
	},
	[PSX_MAP_HW_REGISTERS] = {
		/* Hardware registers */
		.pc = 0x1f801000,
		.length = 0x2000,
		.ops = &hw_regs_ops,
	},
	[PSX_MAP_CACHE_CONTROL] = {
		/* Cache control */
		.pc = 0x5ffe0130,
		.length = 4,
		.ops = &cache_ctrl_ops,
	},

	/* Mirrors of the kernel/user memory */
	[PSX_MAP_MIRROR1] = {
		.pc = 0x00200000,
		.length = 0x200000,
		.mirror_of = &lightrec_map[PSX_MAP_KERNEL_USER_RAM],
	},
	[PSX_MAP_MIRROR2] = {
		.pc = 0x00400000,
		.length = 0x200000,
		.mirror_of = &lightrec_map[PSX_MAP_KERNEL_USER_RAM],
	},
	[PSX_MAP_MIRROR3] = {
		.pc = 0x00600000,
		.length = 0x200000,
		.mirror_of = &lightrec_map[PSX_MAP_KERNEL_USER_RAM],
	},
	[PSX_MAP_CODE_BUFFER] = {
		.length = CODE_BUFFER_SIZE,
	},
};

static void lightrec_enable_ram(struct lightrec_state *state, bool enable)
{
	if (enable)
		memcpy(psxM, cache_buf, sizeof(cache_buf));
	else
		memcpy(cache_buf, psxM, sizeof(cache_buf));
}

static bool lightrec_can_hw_direct(u32 kaddr, bool is_write, u8 size)
{
	switch (size) {
	case 8:
		switch (kaddr) {
		case 0x1f801040:
		case 0x1f801050:
		case 0x1f801800:
		case 0x1f801801:
		case 0x1f801802:
		case 0x1f801803:
			return false;
		default:
			return true;
		}
	case 16:
		switch (kaddr) {
		case 0x1f801040:
		case 0x1f801044:
		case 0x1f801048:
		case 0x1f80104a:
		case 0x1f80104e:
		case 0x1f801050:
		case 0x1f801054:
		case 0x1f80105a:
		case 0x1f80105e:
		case 0x1f801100:
		case 0x1f801104:
		case 0x1f801108:
		case 0x1f801110:
		case 0x1f801114:
		case 0x1f801118:
		case 0x1f801120:
		case 0x1f801124:
		case 0x1f801128:
			return false;
		case 0x1f801070:
		case 0x1f801074:
			return !is_write;
		default:
			return is_write || kaddr < 0x1f801c00 || kaddr >= 0x1f801e00;
		}
	default:
		switch (kaddr) {
		case 0x1f801040:
		case 0x1f801050:
		case 0x1f801100:
		case 0x1f801104:
		case 0x1f801108:
		case 0x1f801110:
		case 0x1f801114:
		case 0x1f801118:
		case 0x1f801120:
		case 0x1f801124:
		case 0x1f801128:
		case 0x1f801810:
		case 0x1f801814:
		case 0x1f801820:
		case 0x1f801824:
			return false;
		case 0x1f801070:
		case 0x1f801074:
		case 0x1f801088:
		case 0x1f801098:
		case 0x1f8010a8:
		case 0x1f8010b8:
		case 0x1f8010c8:
		case 0x1f8010e8:
		case 0x1f8010f4:
			return !is_write;
		default:
			return !is_write || kaddr < 0x1f801c00 || kaddr >= 0x1f801e00;
		}
	}
}

static const struct lightrec_ops lightrec_ops = {
	.cop2_op = cop2_op,
	.enable_ram = lightrec_enable_ram,
	.hw_direct = lightrec_can_hw_direct,
};

static int lightrec_plugin_init(void)
{
	lightrec_map[PSX_MAP_KERNEL_USER_RAM].address = psxM;
	lightrec_map[PSX_MAP_BIOS].address = psxR;
	lightrec_map[PSX_MAP_SCRATCH_PAD].address = psxH;
	lightrec_map[PSX_MAP_HW_REGISTERS].address = psxH + 0x1000;
	lightrec_map[PSX_MAP_PARALLEL_PORT].address = psxP;

	if (LIGHTREC_CUSTOM_MAP) {
		lightrec_map[PSX_MAP_MIRROR1].address = psxM + 0x200000;
		lightrec_map[PSX_MAP_MIRROR2].address = psxM + 0x400000;
		lightrec_map[PSX_MAP_MIRROR3].address = psxM + 0x600000;
		lightrec_map[PSX_MAP_CODE_BUFFER].address = code_buffer;
	}

	use_lightrec_interpreter = !!getenv("LIGHTREC_INTERPRETER");
	if (getenv("LIGHTREC_BEGIN_CYCLES"))
	  lightrec_begin_cycles = (unsigned int) strtol(
				  getenv("LIGHTREC_BEGIN_CYCLES"), NULL, 0);

	lightrec_state = lightrec_init(name,
			lightrec_map, ARRAY_SIZE(lightrec_map),
			&lightrec_ops);

	// fprintf(stderr, "M=0x%lx, P=0x%lx, R=0x%lx, H=0x%lx\n",
	// 		(uintptr_t) psxM,
	// 		(uintptr_t) psxP,
	// 		(uintptr_t) psxR,
	// 		(uintptr_t) psxH);

#ifndef _WIN32
	signal(SIGPIPE, exit);
#endif
	return 0;
}

static void lightrec_dump_regs(struct lightrec_state *state)
{
	struct lightrec_registers *regs = lightrec_get_registers(state);

	if (unlikely(booting))
		memcpy(&psxRegs.GPR, regs->gpr, sizeof(regs->gpr));
	psxRegs.CP0.n.Status = regs->cp0[12];
	psxRegs.CP0.n.Cause = regs->cp0[13];
}

static void lightrec_restore_regs(struct lightrec_state *state)
{
	struct lightrec_registers *regs = lightrec_get_registers(state);

	if (unlikely(booting))
		memcpy(regs->gpr, &psxRegs.GPR, sizeof(regs->gpr));
	regs->cp0[12] = psxRegs.CP0.n.Status;
	regs->cp0[13] = psxRegs.CP0.n.Cause;
	regs->cp0[14] = psxRegs.CP0.n.EPC;
}

extern void intExecuteBlock();
extern void gen_interupt();

static void lightrec_plugin_execute_block(void)
{
	u32 old_pc = psxRegs.pc;
	u32 flags;

	gen_interupt();

	// step during early boot so that 0x80030000 fastboot hack works
	if (booting)
		next_interupt = psxRegs.cycle;

	if (use_pcsx_interpreter) {
		intExecuteBlock();
	} else {
		lightrec_reset_cycle_count(lightrec_state, psxRegs.cycle);
		lightrec_restore_regs(lightrec_state);

		if (unlikely(use_lightrec_interpreter)) {
			psxRegs.pc = lightrec_run_interpreter(lightrec_state,
							      psxRegs.pc,
							      next_interupt);
		} else {
			psxRegs.pc = lightrec_execute(lightrec_state,
						      psxRegs.pc, next_interupt);
		}

		psxRegs.cycle = lightrec_current_cycle_count(lightrec_state);

		lightrec_dump_regs(lightrec_state);
		flags = lightrec_exit_flags(lightrec_state);

		if (flags & LIGHTREC_EXIT_SEGFAULT) {
			fprintf(stderr, "Exiting at cycle 0x%08x\n",
				psxRegs.cycle);
			exit(1);
		}

		if (flags & LIGHTREC_EXIT_SYSCALL)
			psxException(0x20, 0);

		if (booting && (psxRegs.pc & 0xff800000) == 0x80000000)
			booting = false;
	}

	if ((psxRegs.CP0.n.Cause & psxRegs.CP0.n.Status & 0x300) &&
			(psxRegs.CP0.n.Status & 0x1)) {
		/* Handle software interrupts */
		psxRegs.CP0.n.Cause &= ~0x7c;
		psxException(psxRegs.CP0.n.Cause, 0);
	}
}

static void lightrec_plugin_execute(void)
{
	extern int stop;

	while (!stop)
		lightrec_plugin_execute_block();
}

static void lightrec_plugin_clear(u32 addr, u32 size)
{
	if (addr == 0 && size == UINT32_MAX)
		lightrec_invalidate_all(lightrec_state);
	else
		/* size * 4: PCSX uses DMA units */
		lightrec_invalidate(lightrec_state, addr, size * 4);
}

static void lightrec_plugin_notify(int note, void *data)
{
	/*
	To change once proper icache emulation is emulated
	switch (note)
	{
		case R3000ACPU_NOTIFY_CACHE_UNISOLATED:
			lightrec_plugin_clear(0, 0x200000/4);
			break;
		case R3000ACPU_NOTIFY_CACHE_ISOLATED:
		// Sent from psxDma3().
		case R3000ACPU_NOTIFY_DMA3_EXE_LOAD:
		default:
			break;
	}*/
}

static void lightrec_plugin_apply_config()
{
}

static void lightrec_plugin_shutdown(void)
{
	lightrec_destroy(lightrec_state);
}

static void lightrec_plugin_reset(void)
{
	struct lightrec_registers *regs;

	regs = lightrec_get_registers(lightrec_state);

	/* Invalidate all blocks */
	lightrec_invalidate_all(lightrec_state);

	/* Reset registers */
	memset(regs, 0, sizeof(*regs));

	regs->cp0[12] = 0x10900000; // COP0 enabled | BEV = 1 | TS = 1
	regs->cp0[15] = 0x00000002; // PRevID = Revision ID, same as R3000A

	booting = true;
}

void lightrec_plugin_prepare_load_state(void)
{
	struct lightrec_registers *regs;

	regs = lightrec_get_registers(lightrec_state);
	memcpy(regs->cp2d, &psxRegs.CP2, sizeof(regs->cp2d) + sizeof(regs->cp2c));
	memcpy(regs->cp0, &psxRegs.CP0, sizeof(regs->cp0));
	memcpy(regs->gpr, &psxRegs.GPR, sizeof(regs->gpr));

	lightrec_invalidate_all(lightrec_state);
}

void lightrec_plugin_prepare_save_state(void)
{
	struct lightrec_registers *regs;

	regs = lightrec_get_registers(lightrec_state);
	memcpy(&psxRegs.CP2, regs->cp2d, sizeof(regs->cp2d) + sizeof(regs->cp2c));
	memcpy(&psxRegs.CP0, regs->cp0, sizeof(regs->cp0));
	memcpy(&psxRegs.GPR, regs->gpr, sizeof(regs->gpr));
}

R3000Acpu psxRec =
{
	lightrec_plugin_init,
	lightrec_plugin_reset,
	lightrec_plugin_execute,
	lightrec_plugin_execute_block,
	lightrec_plugin_clear,
	lightrec_plugin_notify,
	lightrec_plugin_apply_config,
	lightrec_plugin_shutdown,
};
Commit	Line	Data
	1	#include <lightrec.h>
	2	#include <stdbool.h>
	3	#include <stdio.h>
	4	#include <unistd.h>
	5	#include <signal.h>
	6
	7	#include "../cdrom.h"
	8	#include "../gpu.h"
	9	#include "../gte.h"
	10	#include "../mdec.h"
	11	#include "../psxdma.h"
	12	#include "../psxhw.h"
	13	#include "../psxmem.h"
	14	#include "../r3000a.h"
	15
	16	#include "../frontend/main.h"
	17
	18	#include "mem.h"
	19	#include "plugin.h"
	20
	21	#if (defined(__arm__) \|\| defined(__aarch64__)) && !defined(ALLOW_LIGHTREC_ON_ARM)
	22	#error "Lightrec should not be used on ARM (please specify DYNAREC=ari64 to make)"
	23	#endif
	24
	25	#define ARRAY_SIZE(x) (sizeof(x) ? sizeof(x) / sizeof((x)[0]) : 0)
	26
	27	#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
	28	# define LE32TOH(x) __builtin_bswap32(x)
	29	# define HTOLE32(x) __builtin_bswap32(x)
	30	# define LE16TOH(x) __builtin_bswap16(x)
	31	# define HTOLE16(x) __builtin_bswap16(x)
	32	#else
	33	# define LE32TOH(x) (x)
	34	# define HTOLE32(x) (x)
	35	# define LE16TOH(x) (x)
	36	# define HTOLE16(x) (x)
	37	#endif
	38
	39	#ifdef __GNUC__
	40	# define likely(x) __builtin_expect(!!(x),1)
	41	# define unlikely(x) __builtin_expect(!!(x),0)
	42	#else
	43	# define likely(x) (x)
	44	# define unlikely(x) (x)
	45	#endif
	46
	47	psxRegisters psxRegs;
	48	Rcnt rcnts[4];
	49
	50	static struct lightrec_state *lightrec_state;
	51
	52	static char *name = "retroarch.exe";
	53
	54	static bool use_lightrec_interpreter;
	55	static bool use_pcsx_interpreter;
	56	static bool booting;
	57	static u32 lightrec_begin_cycles;
	58
	59	enum my_cp2_opcodes {
	60	OP_CP2_RTPS = 0x01,
	61	OP_CP2_NCLIP = 0x06,
	62	OP_CP2_OP = 0x0c,
	63	OP_CP2_DPCS = 0x10,
	64	OP_CP2_INTPL = 0x11,
	65	OP_CP2_MVMVA = 0x12,
	66	OP_CP2_NCDS = 0x13,
	67	OP_CP2_CDP = 0x14,
	68	OP_CP2_NCDT = 0x16,
	69	OP_CP2_NCCS = 0x1b,
	70	OP_CP2_CC = 0x1c,
	71	OP_CP2_NCS = 0x1e,
	72	OP_CP2_NCT = 0x20,
	73	OP_CP2_SQR = 0x28,
	74	OP_CP2_DCPL = 0x29,
	75	OP_CP2_DPCT = 0x2a,
	76	OP_CP2_AVSZ3 = 0x2d,
	77	OP_CP2_AVSZ4 = 0x2e,
	78	OP_CP2_RTPT = 0x30,
	79	OP_CP2_GPF = 0x3d,
	80	OP_CP2_GPL = 0x3e,
	81	OP_CP2_NCCT = 0x3f,
	82	};
	83
	84	static void (cp2_ops[])(struct psxCP2Regs ) = {
	85	[OP_CP2_RTPS] = gteRTPS,
	86	[OP_CP2_RTPS] = gteRTPS,
	87	[OP_CP2_NCLIP] = gteNCLIP,
	88	[OP_CP2_OP] = gteOP,
	89	[OP_CP2_DPCS] = gteDPCS,
	90	[OP_CP2_INTPL] = gteINTPL,
	91	[OP_CP2_MVMVA] = gteMVMVA,
	92	[OP_CP2_NCDS] = gteNCDS,
	93	[OP_CP2_CDP] = gteCDP,
	94	[OP_CP2_NCDT] = gteNCDT,
	95	[OP_CP2_NCCS] = gteNCCS,
	96	[OP_CP2_CC] = gteCC,
	97	[OP_CP2_NCS] = gteNCS,
	98	[OP_CP2_NCT] = gteNCT,
	99	[OP_CP2_SQR] = gteSQR,
	100	[OP_CP2_DCPL] = gteDCPL,
	101	[OP_CP2_DPCT] = gteDPCT,
	102	[OP_CP2_AVSZ3] = gteAVSZ3,
	103	[OP_CP2_AVSZ4] = gteAVSZ4,
	104	[OP_CP2_RTPT] = gteRTPT,
	105	[OP_CP2_GPF] = gteGPF,
	106	[OP_CP2_GPL] = gteGPL,
	107	[OP_CP2_NCCT] = gteNCCT,
	108	};
	109
	110	static char cache_buf[64 * 1024];
	111
	112	static void cop2_op(struct lightrec_state *state, u32 func)
	113	{
	114	struct lightrec_registers *regs = lightrec_get_registers(state);
	115
	116	psxRegs.code = func;
	117
	118	if (unlikely(!cp2_ops[func & 0x3f])) {
	119	fprintf(stderr, "Invalid CP2 function %u\n", func);
	120	} else {
	121	/* This works because regs->cp2c comes right after regs->cp2d,
	122	* so it can be cast to a pcsxCP2Regs pointer. */
	123	cp2_ops[func & 0x3f]((psxCP2Regs *) regs->cp2d);
	124	}
	125	}
	126
	127	static bool has_interrupt(void)
	128	{
	129	struct lightrec_registers *regs = lightrec_get_registers(lightrec_state);
	130
	131	return ((psxHu32(0x1070) & psxHu32(0x1074)) &&
	132	(regs->cp0[12] & 0x401) == 0x401) \|\|
	133	(regs->cp0[12] & regs->cp0[13] & 0x0300);
	134	}
	135
	136	static void lightrec_restore_state(struct lightrec_state *state)
	137	{
	138	lightrec_reset_cycle_count(state, psxRegs.cycle);
	139
	140	if (booting \|\| has_interrupt())
	141	lightrec_set_exit_flags(state, LIGHTREC_EXIT_CHECK_INTERRUPT);
	142	else
	143	lightrec_set_target_cycle_count(state, next_interupt);
	144	}
	145
	146	static void hw_write_byte(struct lightrec_state *state,
	147	u32 op, void *host, u32 mem, u8 val)
	148	{
	149	psxRegs.cycle = lightrec_current_cycle_count(state);
	150
	151	psxHwWrite8(mem, val);
	152
	153	lightrec_restore_state(state);
	154	}
	155
	156	static void hw_write_half(struct lightrec_state *state,
	157	u32 op, void *host, u32 mem, u16 val)
	158	{
	159	psxRegs.cycle = lightrec_current_cycle_count(state);
	160
	161	psxHwWrite16(mem, val);
	162
	163	lightrec_restore_state(state);
	164	}
	165
	166	static void hw_write_word(struct lightrec_state *state,
	167	u32 op, void *host, u32 mem, u32 val)
	168	{
	169	psxRegs.cycle = lightrec_current_cycle_count(state);
	170
	171	psxHwWrite32(mem, val);
	172
	173	lightrec_restore_state(state);
	174	}
	175
	176	static u8 hw_read_byte(struct lightrec_state state, u32 op, void host, u32 mem)
	177	{
	178	u8 val;
	179
	180	psxRegs.cycle = lightrec_current_cycle_count(state);
	181
	182	val = psxHwRead8(mem);
	183
	184	lightrec_restore_state(state);
	185
	186	return val;
	187	}
	188
	189	static u16 hw_read_half(struct lightrec_state *state,
	190	u32 op, void *host, u32 mem)
	191	{
	192	u16 val;
	193
	194	psxRegs.cycle = lightrec_current_cycle_count(state);
	195
	196	val = psxHwRead16(mem);
	197
	198	lightrec_restore_state(state);
	199
	200	return val;
	201	}
	202
	203	static u32 hw_read_word(struct lightrec_state *state,
	204	u32 op, void *host, u32 mem)
	205	{
	206	u32 val;
	207
	208	psxRegs.cycle = lightrec_current_cycle_count(state);
	209
	210	val = psxHwRead32(mem);
	211
	212	lightrec_restore_state(state);
	213
	214	return val;
	215	}
	216
	217	static struct lightrec_mem_map_ops hw_regs_ops = {
	218	.sb = hw_write_byte,
	219	.sh = hw_write_half,
	220	.sw = hw_write_word,
	221	.lb = hw_read_byte,
	222	.lh = hw_read_half,
	223	.lw = hw_read_word,
	224	};
	225
	226	static u32 cache_ctrl;
	227
	228	static void cache_ctrl_write_word(struct lightrec_state *state,
	229	u32 op, void *host, u32 mem, u32 val)
	230	{
	231	cache_ctrl = val;
	232	}
	233
	234	static u32 cache_ctrl_read_word(struct lightrec_state *state,
	235	u32 op, void *host, u32 mem)
	236	{
	237	return cache_ctrl;
	238	}
	239
	240	static struct lightrec_mem_map_ops cache_ctrl_ops = {
	241	.sw = cache_ctrl_write_word,
	242	.lw = cache_ctrl_read_word,
	243	};
	244
	245	static struct lightrec_mem_map lightrec_map[] = {
	246	[PSX_MAP_KERNEL_USER_RAM] = {
	247	/* Kernel and user memory */
	248	.pc = 0x00000000,
	249	.length = 0x200000,
	250	},
	251	[PSX_MAP_BIOS] = {
	252	/* BIOS */
	253	.pc = 0x1fc00000,
	254	.length = 0x80000,
	255	},
	256	[PSX_MAP_SCRATCH_PAD] = {
	257	/* Scratch pad */
	258	.pc = 0x1f800000,
	259	.length = 0x400,
	260	},
	261	[PSX_MAP_PARALLEL_PORT] = {
	262	/* Parallel port */
	263	.pc = 0x1f000000,
	264	.length = 0x10000,
	265	},
	266	[PSX_MAP_HW_REGISTERS] = {
	267	/* Hardware registers */
	268	.pc = 0x1f801000,
	269	.length = 0x2000,
	270	.ops = &hw_regs_ops,
	271	},
	272	[PSX_MAP_CACHE_CONTROL] = {
	273	/* Cache control */
	274	.pc = 0x5ffe0130,
	275	.length = 4,
	276	.ops = &cache_ctrl_ops,
	277	},
	278
	279	/* Mirrors of the kernel/user memory */
	280	[PSX_MAP_MIRROR1] = {
	281	.pc = 0x00200000,
	282	.length = 0x200000,
	283	.mirror_of = &lightrec_map[PSX_MAP_KERNEL_USER_RAM],
	284	},
	285	[PSX_MAP_MIRROR2] = {
	286	.pc = 0x00400000,
	287	.length = 0x200000,
	288	.mirror_of = &lightrec_map[PSX_MAP_KERNEL_USER_RAM],
	289	},
	290	[PSX_MAP_MIRROR3] = {
	291	.pc = 0x00600000,
	292	.length = 0x200000,
	293	.mirror_of = &lightrec_map[PSX_MAP_KERNEL_USER_RAM],
	294	},
	295	[PSX_MAP_CODE_BUFFER] = {
	296	.length = CODE_BUFFER_SIZE,
	297	},
	298	};
	299
	300	static void lightrec_enable_ram(struct lightrec_state *state, bool enable)
	301	{
	302	if (enable)
	303	memcpy(psxM, cache_buf, sizeof(cache_buf));
	304	else
	305	memcpy(cache_buf, psxM, sizeof(cache_buf));
	306	}
	307
	308	static bool lightrec_can_hw_direct(u32 kaddr, bool is_write, u8 size)
	309	{
	310	switch (size) {
	311	case 8:
	312	switch (kaddr) {
	313	case 0x1f801040:
	314	case 0x1f801050:
	315	case 0x1f801800:
	316	case 0x1f801801:
	317	case 0x1f801802:
	318	case 0x1f801803:
	319	return false;
	320	default:
	321	return true;
	322	}
	323	case 16:
	324	switch (kaddr) {
	325	case 0x1f801040:
	326	case 0x1f801044:
	327	case 0x1f801048:
	328	case 0x1f80104a:
	329	case 0x1f80104e:
	330	case 0x1f801050:
	331	case 0x1f801054:
	332	case 0x1f80105a:
	333	case 0x1f80105e:
	334	case 0x1f801100:
	335	case 0x1f801104:
	336	case 0x1f801108:
	337	case 0x1f801110:
	338	case 0x1f801114:
	339	case 0x1f801118:
	340	case 0x1f801120:
	341	case 0x1f801124:
	342	case 0x1f801128:
	343	return false;
	344	case 0x1f801070:
	345	case 0x1f801074:
	346	return !is_write;
	347	default:
	348	return is_write \|\| kaddr < 0x1f801c00 \|\| kaddr >= 0x1f801e00;
	349	}
	350	default:
	351	switch (kaddr) {
	352	case 0x1f801040:
	353	case 0x1f801050:
	354	case 0x1f801100:
	355	case 0x1f801104:
	356	case 0x1f801108:
	357	case 0x1f801110:
	358	case 0x1f801114:
	359	case 0x1f801118:
	360	case 0x1f801120:
	361	case 0x1f801124:
	362	case 0x1f801128:
	363	case 0x1f801810:
	364	case 0x1f801814:
	365	case 0x1f801820:
	366	case 0x1f801824:
	367	return false;
	368	case 0x1f801070:
	369	case 0x1f801074:
	370	case 0x1f801088:
	371	case 0x1f801098:
	372	case 0x1f8010a8:
	373	case 0x1f8010b8:
	374	case 0x1f8010c8:
	375	case 0x1f8010e8:
	376	case 0x1f8010f4:
	377	return !is_write;
	378	default:
	379	return !is_write \|\| kaddr < 0x1f801c00 \|\| kaddr >= 0x1f801e00;
	380	}
	381	}
	382	}
	383
	384	static const struct lightrec_ops lightrec_ops = {
	385	.cop2_op = cop2_op,
	386	.enable_ram = lightrec_enable_ram,
	387	.hw_direct = lightrec_can_hw_direct,
	388	};
	389
	390	static int lightrec_plugin_init(void)
	391	{
	392	lightrec_map[PSX_MAP_KERNEL_USER_RAM].address = psxM;
	393	lightrec_map[PSX_MAP_BIOS].address = psxR;
	394	lightrec_map[PSX_MAP_SCRATCH_PAD].address = psxH;
	395	lightrec_map[PSX_MAP_HW_REGISTERS].address = psxH + 0x1000;
	396	lightrec_map[PSX_MAP_PARALLEL_PORT].address = psxP;
	397
	398	if (LIGHTREC_CUSTOM_MAP) {
	399	lightrec_map[PSX_MAP_MIRROR1].address = psxM + 0x200000;
	400	lightrec_map[PSX_MAP_MIRROR2].address = psxM + 0x400000;
	401	lightrec_map[PSX_MAP_MIRROR3].address = psxM + 0x600000;
	402	lightrec_map[PSX_MAP_CODE_BUFFER].address = code_buffer;
	403	}
	404
	405	use_lightrec_interpreter = !!getenv("LIGHTREC_INTERPRETER");
	406	if (getenv("LIGHTREC_BEGIN_CYCLES"))
	407	lightrec_begin_cycles = (unsigned int) strtol(
	408	getenv("LIGHTREC_BEGIN_CYCLES"), NULL, 0);
	409
	410	lightrec_state = lightrec_init(name,
	411	lightrec_map, ARRAY_SIZE(lightrec_map),
	412	&lightrec_ops);
	413
	414	// fprintf(stderr, "M=0x%lx, P=0x%lx, R=0x%lx, H=0x%lx\n",
	415	// (uintptr_t) psxM,
	416	// (uintptr_t) psxP,
	417	// (uintptr_t) psxR,
	418	// (uintptr_t) psxH);
	419
	420	#ifndef _WIN32
	421	signal(SIGPIPE, exit);
	422	#endif
	423	return 0;
	424	}
	425
	426	static void lightrec_dump_regs(struct lightrec_state *state)
	427	{
	428	struct lightrec_registers *regs = lightrec_get_registers(state);
	429
	430	if (unlikely(booting))
	431	memcpy(&psxRegs.GPR, regs->gpr, sizeof(regs->gpr));
	432	psxRegs.CP0.n.Status = regs->cp0[12];
	433	psxRegs.CP0.n.Cause = regs->cp0[13];
	434	}
	435
	436	static void lightrec_restore_regs(struct lightrec_state *state)
	437	{
	438	struct lightrec_registers *regs = lightrec_get_registers(state);
	439
	440	if (unlikely(booting))
	441	memcpy(regs->gpr, &psxRegs.GPR, sizeof(regs->gpr));
	442	regs->cp0[12] = psxRegs.CP0.n.Status;
	443	regs->cp0[13] = psxRegs.CP0.n.Cause;
	444	regs->cp0[14] = psxRegs.CP0.n.EPC;
	445	}
	446
	447	extern void intExecuteBlock();
	448	extern void gen_interupt();
	449
	450	static void lightrec_plugin_execute_block(void)
	451	{
	452	u32 old_pc = psxRegs.pc;
	453	u32 flags;
	454
	455	gen_interupt();
	456
	457	// step during early boot so that 0x80030000 fastboot hack works
	458	if (booting)
	459	next_interupt = psxRegs.cycle;
	460
	461	if (use_pcsx_interpreter) {
	462	intExecuteBlock();
	463	} else {
	464	lightrec_reset_cycle_count(lightrec_state, psxRegs.cycle);
	465	lightrec_restore_regs(lightrec_state);
	466
	467	if (unlikely(use_lightrec_interpreter)) {
	468	psxRegs.pc = lightrec_run_interpreter(lightrec_state,
	469	psxRegs.pc,
	470	next_interupt);
	471	} else {
	472	psxRegs.pc = lightrec_execute(lightrec_state,
	473	psxRegs.pc, next_interupt);
	474	}
	475
	476	psxRegs.cycle = lightrec_current_cycle_count(lightrec_state);
	477
	478	lightrec_dump_regs(lightrec_state);
	479	flags = lightrec_exit_flags(lightrec_state);
	480
	481	if (flags & LIGHTREC_EXIT_SEGFAULT) {
	482	fprintf(stderr, "Exiting at cycle 0x%08x\n",
	483	psxRegs.cycle);
	484	exit(1);
	485	}
	486
	487	if (flags & LIGHTREC_EXIT_SYSCALL)
	488	psxException(0x20, 0);
	489
	490	if (booting && (psxRegs.pc & 0xff800000) == 0x80000000)
	491	booting = false;
	492	}
	493
	494	if ((psxRegs.CP0.n.Cause & psxRegs.CP0.n.Status & 0x300) &&
	495	(psxRegs.CP0.n.Status & 0x1)) {
	496	/* Handle software interrupts */
	497	psxRegs.CP0.n.Cause &= ~0x7c;
	498	psxException(psxRegs.CP0.n.Cause, 0);
	499	}
	500	}
	501
	502	static void lightrec_plugin_execute(void)
	503	{
	504	extern int stop;
	505
	506	while (!stop)
	507	lightrec_plugin_execute_block();
	508	}
	509
	510	static void lightrec_plugin_clear(u32 addr, u32 size)
	511	{
	512	if (addr == 0 && size == UINT32_MAX)
	513	lightrec_invalidate_all(lightrec_state);
	514	else
	515	/* size * 4: PCSX uses DMA units */
	516	lightrec_invalidate(lightrec_state, addr, size * 4);
	517	}
	518
	519	static void lightrec_plugin_notify(int note, void *data)
	520	{
	521	/*
	522	To change once proper icache emulation is emulated
	523	switch (note)
	524	{
	525	case R3000ACPU_NOTIFY_CACHE_UNISOLATED:
	526	lightrec_plugin_clear(0, 0x200000/4);
	527	break;
	528	case R3000ACPU_NOTIFY_CACHE_ISOLATED:
	529	// Sent from psxDma3().
	530	case R3000ACPU_NOTIFY_DMA3_EXE_LOAD:
	531	default:
	532	break;
	533	}*/
	534	}
	535
	536	static void lightrec_plugin_apply_config()
	537	{
	538	}
	539
	540	static void lightrec_plugin_shutdown(void)
	541	{
	542	lightrec_destroy(lightrec_state);
	543	}
	544
	545	static void lightrec_plugin_reset(void)
	546	{
	547	struct lightrec_registers *regs;
	548
	549	regs = lightrec_get_registers(lightrec_state);
	550
	551	/* Invalidate all blocks */
	552	lightrec_invalidate_all(lightrec_state);
	553
	554	/* Reset registers */
	555	memset(regs, 0, sizeof(*regs));
	556
	557	regs->cp0[12] = 0x10900000; // COP0 enabled \| BEV = 1 \| TS = 1
	558	regs->cp0[15] = 0x00000002; // PRevID = Revision ID, same as R3000A
	559
	560	booting = true;
	561	}
	562
	563	void lightrec_plugin_prepare_load_state(void)
	564	{
	565	struct lightrec_registers *regs;
	566
	567	regs = lightrec_get_registers(lightrec_state);
	568	memcpy(regs->cp2d, &psxRegs.CP2, sizeof(regs->cp2d) + sizeof(regs->cp2c));
	569	memcpy(regs->cp0, &psxRegs.CP0, sizeof(regs->cp0));
	570	memcpy(regs->gpr, &psxRegs.GPR, sizeof(regs->gpr));
	571
	572	lightrec_invalidate_all(lightrec_state);
	573	}
	574
	575	void lightrec_plugin_prepare_save_state(void)
	576	{
	577	struct lightrec_registers *regs;
	578
	579	regs = lightrec_get_registers(lightrec_state);
	580	memcpy(&psxRegs.CP2, regs->cp2d, sizeof(regs->cp2d) + sizeof(regs->cp2c));
	581	memcpy(&psxRegs.CP0, regs->cp0, sizeof(regs->cp0));
	582	memcpy(&psxRegs.GPR, regs->gpr, sizeof(regs->gpr));
	583	}
	584
	585	R3000Acpu psxRec =
	586	{
	587	lightrec_plugin_init,
	588	lightrec_plugin_reset,
	589	lightrec_plugin_execute,
	590	lightrec_plugin_execute_block,
	591	lightrec_plugin_clear,
	592	lightrec_plugin_notify,
	593	lightrec_plugin_apply_config,
	594	lightrec_plugin_shutdown,
	595	};