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Cheats support (backend only) (#94)

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<!--- Provide a general summary of your changes in the Title above -->

## Description
This PR implements cheat support (patcher + engine) with a simple API to
provide Action Replay/Game Shark compatible cheats (with exception of
cheats that utilize GS button).

API consist of a single pointer to an array of the cheats ended with a
double zero entry,
For example, if you want to pass these cheats to the patcher:
```
D01F9B91 0020 // Majora's Mask (USA) Inventory Editor
803FDA3F 0002
```
Put cheats in a `uint32_t` array as such (notice last two entries are
zeros):
```
uint32_t cheats[] = {
    0xD01F9B91,
    0x0020,
    0x803FDA3F,
    0x0002,
    0,
    0,
};
```
And pass this array as a boot parameter: `menu->boot_params->cheat_list
= cheats;`

<!--- Describe your changes in detail -->

## Motivation and Context
To provide users with ability to run game modifications in a easy way.
<!--- What does this sample do? What problem does it solve? -->
<!--- If it fixes/closes/resolves an open issue, please link to the
issue here -->

## How Has This Been Tested?
On a SummerCart64 flashcart + assembly instructions generation verified
in ares emulator via GDB.
<!-- (if applicable) -->
<!--- Please describe in detail how you tested your sample/changes. -->
<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->

## Screenshots
No screenshots
<!-- (if appropriate): -->

## Types of changes
<!--- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Improvement (non-breaking change that adds a new feature)
- [ ] Bug fix (fixes an issue)
- [ ] Breaking change (breaking change)
- [ ] Config and build (change in the configuration and build system,
has no impact on code or features)

## Checklist:
<!--- Go over all the following points, and put an `x` in all the boxes
that apply. -->
<!--- If you're unsure about any of these, don't hesitate to ask. We're
here to help! -->
- [x] My code follows the code style of this project.
- [x] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.
- [ ] I have added tests to cover my changes.
- [ ] All new and existing tests passed.

<!--- It would be nice if you could sign off your contribution by
replacing the name with your GitHub user name and GitHub email contact.
-->
Signed-off-by: Polprzewodnikowy <sc@mateuszfaderewski.pl>
This commit is contained in:
Mateusz Faderewski 2024-05-05 00:19:20 +02:00 committed by GitHub
parent 24f49f1447
commit 01968b55db
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
12 changed files with 787 additions and 12 deletions
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1
Makefile
View File

@ -23,6 +23,7 @@ N64_CFLAGS += -iquote $(SOURCE_DIR) -iquote $(ASSETS_DIR) -I $(SOURCE_DIR)/libs
SRCS = \
main.c \
boot/boot.c \
boot/cheats.c \
boot/cic.c \
boot/reboot.S \
flashcart/64drive/64drive_ll.c \

25
src/boot/boot.c
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@ -2,7 +2,9 @@
#include "boot_io.h"
#include "boot.h"
#include "cheats.h"
#include "cic.h"
#include "reboot.h"
#define C0_STATUS_FR (1 << 26)
@ -10,10 +12,6 @@
#define C0_STATUS_CU1 (1 << 29)
extern uint32_t reboot_start __attribute__((section(".text")));
extern size_t reboot_size __attribute__((section(".text")));
static io32_t *boot_get_device_base (boot_params_t *params) {
io32_t *device_base_address = ROM_CART;
if (params->device_type == BOOT_DEVICE_TYPE_64DD) {
@ -22,7 +20,7 @@ static io32_t *boot_get_device_base (boot_params_t *params) {
return device_base_address;
}
static void boot_detect_cic_seed (boot_params_t *params) {
static cic_type_t boot_detect_cic (boot_params_t *params) {
io32_t *base = boot_get_device_base(params);
uint8_t ipl3[IPL3_LENGTH] __attribute__((aligned(8)));
@ -31,11 +29,17 @@ static void boot_detect_cic_seed (boot_params_t *params) {
dma_read_raw_async(ipl3, (uint32_t) (&base[16]), sizeof(ipl3));
dma_wait();
params->cic_seed = cic_get_seed(cic_detect(ipl3));
return cic_detect(ipl3);
}
void boot (boot_params_t *params) {
cic_type_t cic_type = boot_detect_cic(params);
if (params->detect_cic_seed) {
params->cic_seed = cic_get_seed(cic_type);
}
if (params->tv_type == BOOT_TV_TYPE_PASSTHROUGH) {
switch (get_tv_type()) {
case TV_PAL:
@ -53,10 +57,6 @@ void boot (boot_params_t *params) {
}
}
if (params->detect_cic_seed) {
boot_detect_cic_seed(params);
}
C0_WRITE_STATUS(C0_STATUS_CU1 | C0_STATUS_CU0 | C0_STATUS_FR);
while (!(cpu_io_read(&SP->SR) & SP_SR_HALT));
@ -123,12 +123,16 @@ void boot (boot_params_t *params) {
cpu_io_write(&ipl3_dst[i], io_read((uint32_t) (&ipl3_src[i])));
}
bool cheats_installed = cheats_install(cic_type, params->cheat_list);
register uint32_t skip_rdram_reset asm ("a0");
register uint32_t boot_device asm ("s3");
register uint32_t tv_type asm ("s4");
register uint32_t reset_type asm ("s5");
register uint32_t cic_seed asm ("s6");
register uint32_t version asm ("s7");
skip_rdram_reset = cheats_installed;
boot_device = (params->device_type & 0x01);
tv_type = (params->tv_type & 0x03);
reset_type = BOOT_RESET_TYPE_COLD;
@ -141,6 +145,7 @@ void boot (boot_params_t *params) {
asm volatile (
"la $t3, reboot \n"
"jr $t3 \n" ::
[skip_rdram_reset] "r" (skip_rdram_reset),
[boot_device] "r" (boot_device),
[tv_type] "r" (tv_type),
[reset_type] "r" (reset_type),

1
src/boot/boot.h
View File

@ -38,6 +38,7 @@ typedef struct {
boot_tv_type_t tv_type;
uint8_t cic_seed;
bool detect_cic_seed;
uint32_t *cheat_list;
} boot_params_t;

335
src/boot/cheats.c Normal file
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@ -0,0 +1,335 @@
#include <libdragon.h>
#include "boot_io.h"
#include "cheats.h"
#include "vr4300_asm.h"
#define HIT_INVALIDATE_I ((4 << 2) | 0)
#define HIT_WRITE_BACK_D ((6 << 2) | 1)
#define D_CACHE_LINE_SIZE (16)
#define CAUSE_IRQ_PRE_NMI (1 << 12)
#define CAUSE_EXC_CODE_MASK (0x7C)
#define CAUSE_EXC_CODE_WATCH (0x5C)
#define WATCHLO_W (1 << 0)
#define RELOCATED_EXCEPTION_HANDLER_ADDRESS (0x80000120)
#define EXCEPTION_HANDLER_ADDRESS (0x80000180)
#define PATCHER_ADDRESS (0x80700000)
#define ENGINE_TEMPORARY_ADDRESS (PATCHER_ADDRESS + 0x10000)
#define DEFAULT_ENGINE_ADDRESS (0x807C5C00)
typedef struct {
uint8_t type;
uint32_t address;
uint16_t value;
} cheat_t;
typedef struct {
cheat_t main;
cheat_t sub;
} cheat_entry_t;
typedef enum {
SPECIAL_DISABLE_EXPANSION_PAK = 0xEE,
SPECIAL_WRITE_BYTE_ON_BOOT = 0xF0,
SPECIAL_WRITE_SHORT_ON_BOOT = 0xF1,
SPECIAL_SET_STORE_LOCATION = 0xFF,
} cheat_type_special_t;
#define IS_WIDTH_16(t) ((t) & (1 << 0))
#define IS_CONDITION_NOT_EQUAL(t) ((t) & (1 << 1))
#define IS_CONDITION_GS_BUTTON(t) ((t) & (1 << 3))
#define IS_TYPE_REPEATER(t) ((t) == 0x50)
#define IS_TYPE_WRITE(t) ((((t)&0xF0) == 0x80) || (((t)&0xF0) == 0xA0))
#define IS_TYPE_CONDITIONAL(t) (((t)&0xF0) == 0xD0)
#define IS_DOUBLE_ENTRY(t) (IS_TYPE_CONDITIONAL(t) || IS_TYPE_REPEATER(t))
static bool cheats_patch_ipl3 (cic_type_t cic_type, io32_t *target) {
uint32_t patch_offset = 0;
uint32_t j_instruction = I_J((uint32_t)(target));
io32_t *ipl3 = SP_MEM->DMEM;
switch (cic_type) {
case CIC_5101: patch_offset = 476; break;
case CIC_6101:
case CIC_7102: patch_offset = 476; break;
case CIC_x102: patch_offset = 475; break;
case CIC_x103: patch_offset = 472; break;
case CIC_x105: patch_offset = 499; break;
case CIC_x106: patch_offset = 488; break;
default: return true;
}
// NOTE: Check for "jr $t1" instruction
// Libdragon IPL3 could be brute-force signed with any retail
// CIC seed and checksum, and we support only retail libultra IPL3
if (cpu_io_read(&ipl3[patch_offset]) != I_JR(REG_T1)) {
return false;
}
switch (cic_type) {
case CIC_x105:
// NOTE: This disables game code checksum verification
cpu_io_write(&ipl3[486], I_NOP());
break;
case CIC_x106:
// NOTE: CIC x106 IPL3 is partially scrambled
j_instruction ^= 0x8188764A;
break;
default: break;
}
cpu_io_write(&ipl3[patch_offset], j_instruction);
return false;
}
static bool cheats_get_next (uint32_t **cheat_list, cheat_entry_t *cheat) {
cheat_t *c = &cheat->main;
cheat->sub.type = 0;
for (int i = 0; i < 2; i++) {
uint32_t raw[2] = {(*cheat_list)[0], (*cheat_list)[1]};
(*cheat_list) += 2;
if ((raw[0] == 0) && (raw[1] == 0)) {
return false;
}
c->type = ((raw[0] >> 24) & 0xFF);
c->address = (raw[0] & 0xA07FFFFF);
c->value = (raw[1] & 0xFFFF);
if (!IS_DOUBLE_ENTRY(c->type)) {
break;
}
c = &cheat->sub;
}
return true;
}
static io32_t *cheats_get_engine_address (uint32_t *cheat_list) {
cheat_entry_t cheat;
while (cheats_get_next(&cheat_list, &cheat)) {
if (cheat.main.type == SPECIAL_SET_STORE_LOCATION) {
return (io32_t *)(cheat.main.address & 0x807FFFFF);
}
}
return (io32_t *)(DEFAULT_ENGINE_ADDRESS);
}
static void cheats_update_cache (volatile void *start, volatile void *end) {
data_cache_hit_writeback(start, (end - start));
inst_cache_hit_invalidate(start, (end - start));
}
bool cheats_install (cic_type_t cic_type, uint32_t *cheat_list) {
if (!cheat_list) {
return false;
}
io32_t *engine_start = (io32_t *)(ENGINE_TEMPORARY_ADDRESS);
io32_t *engine_p = engine_start;
io32_t *patcher_start = (io32_t *)(PATCHER_ADDRESS);
io32_t *patcher_p = patcher_start;
if (cheats_patch_ipl3(cic_type, patcher_start)) {
return false;
}
io32_t *final_engine_address = cheats_get_engine_address(cheat_list);
// Original watch exception handler code written by Jay Oster 'Parasyte'
// https://github.com/parasyte/alt64/blob/master/utils.c#L1024-L1054
uint32_t ori_placeholder_instruction = I_ORI(REG_ZERO, REG_K0, A_OFFSET(RELOCATED_EXCEPTION_HANDLER_ADDRESS));
uint32_t ori_placeholder_address = (uint32_t)(final_engine_address + 20);
// Load cause register
*engine_p++ = I_MFC0(REG_K0, C0_REG_CAUSE);
// Disable watch exception when reset button is pressed
*engine_p++ = I_ANDI(REG_K1, REG_K0, CAUSE_IRQ_PRE_NMI);
*engine_p++ = I_BNEL(REG_K1, REG_ZERO, 1);
*engine_p++ = I_MTC0(REG_ZERO, C0_REG_WATCH_LO);
// Check if watch exception ocurred, if yes then proceed to relocate the game exception handler
*engine_p++ = I_ANDI(REG_K0, REG_K0, CAUSE_EXC_CODE_MASK);
*engine_p++ = I_ORI(REG_K1, REG_ZERO, CAUSE_EXC_CODE_WATCH);
*engine_p++ = I_BNE(REG_K0, REG_K1, 15); // Skips to after the 'eret' instruction
// Extract base register number from the store instruction
*engine_p++ = I_MFC0(REG_K1, C0_REG_EPC);
*engine_p++ = I_LW(REG_K1, 0, REG_K1);
*engine_p++ = I_LUI(REG_K0, 0x03E0);
*engine_p++ = I_AND(REG_K1, REG_K0, REG_K1);
*engine_p++ = I_SRL(REG_K1, REG_K1, 5);
// Update create final instruction and update its target register number
*engine_p++ = I_LUI(REG_K0, ori_placeholder_instruction >> 16);
*engine_p++ = I_ORI(REG_K0, REG_K0, ori_placeholder_instruction);
*engine_p++ = I_OR(REG_K0, REG_K0, REG_K1);
// Write created instruction into placeholder
*engine_p++ = I_LUI(REG_K1, A_BASE(ori_placeholder_address));
*engine_p++ = I_SW(REG_K0, A_OFFSET(ori_placeholder_address), REG_K1);
// Force write and instruction cache invalidation
*engine_p++ = I_CACHE(HIT_WRITE_BACK_D, A_OFFSET(ori_placeholder_address), REG_K1);
*engine_p++ = I_CACHE(HIT_INVALIDATE_I, A_OFFSET(ori_placeholder_address), REG_K1);
// Load address base and execute created instruction
*engine_p++ = I_LUI(REG_K0, A_BASE(RELOCATED_EXCEPTION_HANDLER_ADDRESS));
*engine_p++ = I_NOP();
// Return from the exception
*engine_p++ = I_ERET();
cheat_entry_t cheat;
while (cheats_get_next(&cheat_list, &cheat)) {
cheat_t *c = &cheat.main;
if (IS_TYPE_REPEATER(c->type)) {
if ((!IS_TYPE_WRITE(cheat.sub.type)) || IS_CONDITION_GS_BUTTON(cheat.sub.type)) {
continue;
}
int count = ((c->address >> 8) & 0xFF);
int step = (c->address & 0xFF);
int16_t increment = (int16_t)(c->value);
c = &cheat.sub;
for (int i = 0; i < count; i++) {
*engine_p++ = I_LUI(REG_K0, A_BASE(c->address));
*engine_p++ = I_ORI(REG_K1, REG_ZERO, c->value);
*engine_p++ = IS_WIDTH_16(c->type) ? I_SH(REG_K1, A_OFFSET(c->address), REG_K0)
: I_SB(REG_K1, A_OFFSET(c->address), REG_K0);
c->address += step;
c->value += increment;
}
continue;
}
if (IS_TYPE_CONDITIONAL(c->type)) {
if ((!IS_TYPE_WRITE(cheat.sub.type)) || IS_CONDITION_GS_BUTTON(cheat.sub.type)) {
continue;
}
*engine_p++ = I_LUI(REG_K0, A_BASE(c->address));
*engine_p++ = IS_WIDTH_16(c->type) ? I_LHU(REG_K0, A_OFFSET(c->address), REG_K0)
: I_LBU(REG_K0, A_OFFSET(c->address), REG_K0);
*engine_p++ = I_ORI(REG_K1, REG_ZERO, c->value & (IS_WIDTH_16(c->type) ? 0xFFFF : 0xFF));
*engine_p++ = IS_CONDITION_NOT_EQUAL(c->type) ? I_BEQ(REG_K0, REG_K1, 3) : I_BNE(REG_K0, REG_K1, 3);
c = &cheat.sub;
}
if (IS_TYPE_WRITE(c->type)) {
if (IS_CONDITION_GS_BUTTON(c->type)) {
continue;
}
*engine_p++ = I_LUI(REG_K0, A_BASE(c->address));
*engine_p++ = I_ORI(REG_K1, REG_ZERO, c->value);
*engine_p++ = IS_WIDTH_16(c->type) ? I_SH(REG_K1, A_OFFSET(c->address), REG_K0)
: I_SB(REG_K1, A_OFFSET(c->address), REG_K0);
continue;
}
switch (c->type) {
case SPECIAL_WRITE_BYTE_ON_BOOT:
case SPECIAL_WRITE_SHORT_ON_BOOT: {
*patcher_p++ = I_LUI(REG_K0, A_BASE(c->address));
*patcher_p++ = I_ORI(REG_K1, REG_ZERO, c->value);
*patcher_p++ = IS_WIDTH_16(c->type) ? I_SH(REG_K1, A_OFFSET(c->address), REG_K0)
: I_SB(REG_K1, A_OFFSET(c->address), REG_K0);
break;
}
case SPECIAL_DISABLE_EXPANSION_PAK: {
*patcher_p++ = I_LUI(REG_K0, 0xA000);
*patcher_p++ = I_LUI(REG_K1, 0x0040);
*patcher_p++ = I_SW(REG_K1, 0x318, REG_K0);
*patcher_p++ = I_SW(REG_K1, 0x3F0, REG_K0);
break;
}
default: break;
}
}
*engine_p++ = I_J(RELOCATED_EXCEPTION_HANDLER_ADDRESS);
*engine_p++ = I_NOP();
uint32_t j_engine_from_handler = I_J((uint32_t)(final_engine_address));
// Copy engine to the final location
*patcher_p++ = I_LUI(REG_T3, A_BASE((uint32_t)(engine_start)));
*patcher_p++ = I_ADDIU(REG_T3, REG_T3, A_OFFSET((uint32_t)(engine_start)));
*patcher_p++ = I_LUI(REG_T4, A_BASE((uint32_t)(engine_p)));
*patcher_p++ = I_ADDIU(REG_T4, REG_T4, A_OFFSET((uint32_t)(engine_p)));
*patcher_p++ = I_LUI(REG_T5, A_BASE((uint32_t)(final_engine_address)));
*patcher_p++ = I_ADDIU(REG_T5, REG_T5, A_OFFSET((uint32_t)(final_engine_address)));
*patcher_p++ = I_ORI(REG_T6, REG_ZERO, 0);
*patcher_p++ = I_LW(REG_K1, 0, REG_T3);
*patcher_p++ = I_SW(REG_K1, 0, REG_T5);
*patcher_p++ = I_ADDIU(REG_T3, REG_T3, 4);
*patcher_p++ = I_ADDIU(REG_T5, REG_T5, 4);
*patcher_p++ = I_BNE(REG_T3, REG_T4, -5);
*patcher_p++ = I_ADDIU(REG_T6, REG_T6, 4);
// Force write and invalidate instruction cache
*patcher_p++ = I_LUI(REG_T5, A_BASE((uint32_t)(final_engine_address)));
*patcher_p++ = I_ADDIU(REG_T5, REG_T5, A_OFFSET((uint32_t)(final_engine_address)));
*patcher_p++ = I_CACHE(HIT_WRITE_BACK_D, 0, REG_T5);
*patcher_p++ = I_CACHE(HIT_INVALIDATE_I, 0, REG_T5);
*patcher_p++ = I_ADDIU(REG_T6, REG_T6, -D_CACHE_LINE_SIZE);
*patcher_p++ = I_BGTZ(REG_T6, -4);
*patcher_p++ = I_ADDIU(REG_T5, REG_T5, D_CACHE_LINE_SIZE);
// Write jump instruction to the exception handler
*patcher_p++ = I_LUI(REG_K0, A_BASE(EXCEPTION_HANDLER_ADDRESS));
*patcher_p++ = I_ADDIU(REG_K0, REG_K0, A_OFFSET(EXCEPTION_HANDLER_ADDRESS));
*patcher_p++ = I_LUI(REG_K1, j_engine_from_handler >> 16);
*patcher_p++ = I_ORI(REG_K1, REG_K1, j_engine_from_handler);
*patcher_p++ = I_SW(REG_K1, 0, REG_K0);
*patcher_p++ = I_SW(REG_ZERO, 4, REG_K0);
*patcher_p++ = I_CACHE(HIT_WRITE_BACK_D, 0, REG_K0);
*patcher_p++ = I_CACHE(HIT_INVALIDATE_I, 0, REG_K0);
// Set watch exception on address 0x80000180
*patcher_p++ = I_ORI(REG_K1, REG_ZERO, EXCEPTION_HANDLER_ADDRESS | WATCHLO_W);
*patcher_p++ = I_MTC0(REG_K1, C0_REG_WATCH_LO);
*patcher_p++ = I_MTC0(REG_ZERO, C0_REG_WATCH_HI);
// Jump back to the game code
*patcher_p++ = I_JR(REG_T1);
*patcher_p++ = I_NOP();
cheats_update_cache(engine_start, engine_p);
cheats_update_cache(patcher_start, patcher_p);
return true;
}

10
src/boot/cheats.h Normal file
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@ -0,0 +1,10 @@
#ifndef CHEATS_H__
#define CHEATS_H__
#include <stdint.h>
#include "cic.h"
bool cheats_install (cic_type_t cic_type, uint32_t *cheat_list);
#endif

8
src/boot/reboot.S
View File

@ -1,3 +1,6 @@
#include "reboot.h"
#define IPL3_ENTRY 0xA4000040
#define REBOOT_ADDRESS 0xA4001000
#define STACK_ADDRESS 0xA4001FF0
@ -34,9 +37,10 @@ reboot_entry:
li $sp, STACK_ADDRESS
reset_rdram:
bnez $s5, reset_rdram_skip
bnez $a0, reset_rdram_skip # Skip when cheats are enabled
bnez $s5, reset_rdram_skip # Skip when reset type is set to NMI
reset_rdram:
li $t0, RI_ADDRESS
sw $zero, RI_REFRESH($t0)

17
src/boot/reboot.h Normal file
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@ -0,0 +1,17 @@
#ifndef REBOOT_H__
#define REBOOT_H__
#ifndef __ASSEMBLER__
#include <stdint.h>
#include <stddef.h>
extern uint32_t reboot_start __attribute__((section(".text")));
extern size_t reboot_size __attribute__((section(".text")));
#endif
#endif

397
src/boot/vr4300_asm.h Normal file
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@ -0,0 +1,397 @@
#ifndef VR4300_ASM_H__
#define VR4300_ASM_H__
#include <stdint.h>
typedef union {
uint32_t raw;
struct {
uint32_t op : 6;
uint32_t rs : 5;
uint32_t rt : 5;
uint32_t imm : 16;
} i_type;
struct {
uint32_t op : 6;
uint32_t target : 26;
} j_type;
struct {
uint32_t op : 6;
uint32_t rs : 5;
uint32_t rt : 5;
uint32_t rd : 5;
uint32_t sa : 5;
uint32_t funct : 6;
} r_type;
struct {
uint32_t op : 6;
uint32_t co : 1;
uint32_t funct : 25;
} c_type;
} vr4300_instruction_t;
typedef enum {
OP_SPECIAL,
OP_REGIMM,
OP_J,
OP_JAL,
OP_BEQ,
OP_BNE,
OP_BLEZ,
OP_BGTZ,
OP_ADDI,
OP_ADDIU,
OP_SLTI,
OP_SLTIU,
OP_ANDI,
OP_ORI,
OP_XORI,
OP_LUI,
OP_COP0,
OP_COP1,
OP_COP2,
__OP_RESERVED_19,
OP_BEQL,
OP_BNEL,
OP_BLEZL,
OP_BGTZL,
OP_DADDI,
OP_DADDIU,
OP_LDL,
OP_LDR,
__OP_RESERVED_28,
__OP_RESERVED_29,
__OP_RESERVED_30,
__OP_RESERVED_31,
OP_LB,
OP_LH,
OP_LWL,
OP_LW,
OP_LBU,
OP_LHU,
OP_LWR,
OP_LWU,
OP_SB,
OP_SH,
OP_SWL,
OP_SW,
OP_SDL,
OP_SDR,
OP_SWR,
OP_CACHE,
OP_LL,
OP_LWC1,
OP_LWC2,
__OP_RESERVED_51,
OP_LLD,
OP_LDC1,
OP_LDC2,
OP_LD,
OP_SC,
OP_SWC1,
OP_SWC2,
__OP_RESERVED_59,
OP_SCD,
OP_SDC1,
OP_SDC2,
OP_SD,
} vr4300_op_t;
typedef enum {
FUNCT_SSL,
__FUNCT_RESERVED_1,
FUNCT_SRL,
FUNCT_SRA,
FUNCT_SLLV,
__FUNCT_RESERVED_5,
FUNCT_SRLV,
FUNCT_SRAV,
FUNCT_JR,
FUNCT_JALR,
__FUNCT_RESERVED_10,
__FUNCT_RESERVED_11,
FUNCT_SYSCALL,
FUNCT_BREAK,
__FUNCT_RESERVED_14,
FUNCT_SYNC,
FUNCT_MFHI,
FUNCT_MTHI,
FUNCT_MFLO,
FUNCT_MTLO,
FUNCT_DSLLV,
__FUNCT_RESERVED_21,
FUNCT_DSRLV,
FUNCT_DSRAV,
FUNCT_MULT,
FUNCT_MULTU,
FUNCT_DIV,
FUNCT_DIVU,
FUNCT_DMULT,
FUNCT_DMULTU,
FUNCT_DDIV,
FUNCT_DDIVU,
FUNCT_ADD,
FUNCT_ADDU,
FUNCT_SUB,
FUNCT_SUBU,
FUNCT_AND,
FUNCT_OR,
FUNCT_XOR,
FUNCT_NOR,
__FUNCT_RESERVED_40,
__FUNCT_RESERVED_41,
FUNCT_SLT,
FUNCT_SLTU,
FUNCT_DADD,
FUNCT_DADDU,
FUNCT_DSUB,
FUNCT_DSUBU,
FUNCT_TGE,
FUNCT_TGEU,
FUNCT_TLT,
FUNCT_TLTU,
FUNCT_TEQ,
__FUNCT_RESERVED_53,
FUNCT_TNE,
__FUNCT_RESERVED_55,
FUNCT_DSLL,
__FUNCT_RESERVED_57,
FUNCT_DSRL,
FUNCT_DSRA,
FUNCT_DSLL32,
__FUNCT_RESERVED_61,
FUNCT_DSRL32,
FUNCT_DSRA32,
} vr4300_funct_t;
typedef enum {
REGIMM_BLTZ,
REGIMM_BGEZ,
REGIMM_BLTZL,
REGIMM_BGEZL,
__REGIMM_RESERVED_4,
__REGIMM_RESERVED_5,
__REGIMM_RESERVED_6,
__REGIMM_RESERVED_7,
REGIMM_TGEI,
REGIMM_TGEIU,
REGIMM_TLTI,
REGIMM_TLTIU,
REGIMM_TEQI,
__REGIMM_RESERVED_13,
REGIMM_TNEI,
__REGIMM_RESERVED_15,
REGIMM_BLTZAL,
REGIMM_BGEZAL,
REGIMM_BLTZALL,
REGIMM_BGEZALL,
__REGIMM_RESERVED_20,
__REGIMM_RESERVED_21,
__REGIMM_RESERVED_22,
__REGIMM_RESERVED_23,
__REGIMM_RESERVED_24,
__REGIMM_RESERVED_25,
__REGIMM_RESERVED_26,
__REGIMM_RESERVED_27,
__REGIMM_RESERVED_28,
__REGIMM_RESERVED_29,
__REGIMM_RESERVED_30,
__REGIMM_RESERVED_31,
} vr4300_regimm_t;
typedef enum {
REG_ZERO,
REG_AT,
REG_V0,
REG_V1,
REG_A0,
REG_A1,
REG_A2,
REG_A3,
REG_T0,
REG_T1,
REG_T2,
REG_T3,
REG_T4,
REG_T5,
REG_T6,
REG_T7,
REG_S0,
REG_S1,
REG_S2,
REG_S3,
REG_S4,
REG_S5,
REG_S6,
REG_S7,
REG_T8,
REG_T9,
REG_K0,
REG_K1,
REG_GP,
REG_SP,
REG_FP,
REG_RA,
} vr4300_reg_t;
typedef enum {
C0_REG_INDEX,
C0_REG_RANDOM,
C0_REG_ENTRY_LO_0,
C0_REG_ENTRY_LO_1,
C0_REG_CONTEXT,
C0_REG_PAGE_MASK,
C0_REG_WIRED,
__C0_REG_RESERVED_7,
C0_REG_BAD_V_ADDR,
C0_REG_COUNT,
C0_REG_ENTRY_HI,
C0_REG_COMPARE,
C0_REG_STATUS,
C0_REG_CAUSE,
C0_REG_EPC,
C0_REG_PR_ID,
C0_REG_CONFIG,
C0_REG_LL_ADDR,
C0_REG_WATCH_LO,
C0_REG_WATCH_HI,
C0_REG_X_CONTEXT,
__C0_REG_RESERVED_21,
__C0_REG_RESERVED_22,
__C0_REG_RESERVED_23,
__C0_REG_RESERVED_24,
__C0_REG_RESERVED_25,
C0_REG_PARITY_ERROR,
C0_REG_CACHE_ERROR,
C0_REG_TAG_LO,
C0_REG_TAG_HI,
C0_REG_ERROR_EPC,
__C0_REG_RESERVED_31,
} vr4300_c0_reg_t;
typedef enum {
COPZ_RS_MF,
COPZ_RS_DMF,
COPZ_RS_CF,
__COPZ_RS_RESERVED_3,
COPZ_RS_MT,
COPZ_RS_DMT,
COPZ_RS_CT,
__COPZ_RS_RESERVED_7,
COPZ_RS_BC,
__COPZ_RS_RESERVED_9,
__COPZ_RS_RESERVED_10,
__COPZ_RS_RESERVED_11,
__COPZ_RS_RESERVED_12,
__COPZ_RS_RESERVED_13,
__COPZ_RS_RESERVED_14,
__COPZ_RS_RESERVED_15,
} vr4300_copz_rs_t;
typedef enum {
__C0_FUNCT_RESERVED_0,
C0_FUNCT_TLBR,
C0_FUNCT_TLBWI,
__C0_FUNCT_RESERVED_3,
__C0_FUNCT_RESERVED_4,
__C0_FUNCT_RESERVED_5,
C0_FUNCT_TLBWR,
__C0_FUNCT_RESERVED_7,
C0_FUNCT_TLBP,
__C0_FUNCT_RESERVED_9,
__C0_FUNCT_RESERVED_10,
__C0_FUNCT_RESERVED_11,
__C0_FUNCT_RESERVED_12,
__C0_FUNCT_RESERVED_13,
__C0_FUNCT_RESERVED_14,
__C0_FUNCT_RESERVED_15,
__C0_FUNCT_RESERVED_16,
__C0_FUNCT_RESERVED_17,
__C0_FUNCT_RESERVED_18,
__C0_FUNCT_RESERVED_19,
__C0_FUNCT_RESERVED_20,
__C0_FUNCT_RESERVED_21,
__C0_FUNCT_RESERVED_22,
__C0_FUNCT_RESERVED_23,
C0_FUNCT_ERET,
__C0_FUNCT_RESERVED_25,
__C0_FUNCT_RESERVED_26,
__C0_FUNCT_RESERVED_27,
__C0_FUNCT_RESERVED_28,
__C0_FUNCT_RESERVED_29,
__C0_FUNCT_RESERVED_30,
__C0_FUNCT_RESERVED_31,
__C0_FUNCT_RESERVED_32,
__C0_FUNCT_RESERVED_33,
__C0_FUNCT_RESERVED_34,
__C0_FUNCT_RESERVED_35,
__C0_FUNCT_RESERVED_36,
__C0_FUNCT_RESERVED_37,
__C0_FUNCT_RESERVED_38,
__C0_FUNCT_RESERVED_39,
__C0_FUNCT_RESERVED_40,
__C0_FUNCT_RESERVED_41,
__C0_FUNCT_RESERVED_42,
__C0_FUNCT_RESERVED_43,
__C0_FUNCT_RESERVED_44,
__C0_FUNCT_RESERVED_45,
__C0_FUNCT_RESERVED_46,
__C0_FUNCT_RESERVED_47,
__C0_FUNCT_RESERVED_48,
__C0_FUNCT_RESERVED_49,
__C0_FUNCT_RESERVED_50,
__C0_FUNCT_RESERVED_51,
__C0_FUNCT_RESERVED_52,
__C0_FUNCT_RESERVED_53,
__C0_FUNCT_RESERVED_54,
__C0_FUNCT_RESERVED_55,
__C0_FUNCT_RESERVED_56,
__C0_FUNCT_RESERVED_57,
__C0_FUNCT_RESERVED_58,
__C0_FUNCT_RESERVED_59,
__C0_FUNCT_RESERVED_60,
__C0_FUNCT_RESERVED_61,
__C0_FUNCT_RESERVED_62,
__C0_FUNCT_RESERVED_63,
} vr4300_c0_funct;
#define __ASM_I_INST(o, s, t, i) \
(((vr4300_instruction_t){.i_type = {.op = (o), .rs = (s), .rt = (t), .imm = (i)&0xFFFF}}).raw)
#define __ASM_J_INST(o, t) (((vr4300_instruction_t){.j_type = {.op = (o), .target = (t)&0x3FFFFFF}}).raw)
#define __ASM_R_INST(o, s, t, d, a, f) \
(((vr4300_instruction_t){.r_type = {.op = (o), .rs = (s), .rt = (t), .rd = (d), .sa = (a), .funct = (f)}}).raw)
#define __ASM_C_INST(o, c, f) (((vr4300_instruction_t){.c_type = {.op = (o), .co = (c), .funct = (f)}}).raw)
#define A_OFFSET(a) ((int16_t)((a)&0xFFFF))
#define A_BASE(a) ((uint16_t)((((a) >> 16) & 0xFFFF) + (A_OFFSET(a) < 0 ? 1 : 0)))
#define I_ADDIU(rt, rs, immediate) __ASM_I_INST(OP_ADDIU, rs, rt, immediate)
#define I_AND(rd, rs, rt) __ASM_R_INST(OP_SPECIAL, rs, rt, rd, 0, FUNCT_AND)
#define I_ANDI(rt, rs, immediate) __ASM_I_INST(OP_ANDI, rs, rt, immediate)
#define I_BEQ(rs, rt, offset) __ASM_I_INST(OP_BEQ, rs, rt, offset)
#define I_BGTZ(rs, offset) __ASM_I_INST(OP_BGTZ, rs, 0, offset)
#define I_BNE(rs, rt, offset) __ASM_I_INST(OP_BNE, rs, rt, offset)
#define I_BNEL(rs, rt, offset) __ASM_I_INST(OP_BNEL, rs, rt, offset)
#define I_CACHE(op, offset, base) __ASM_I_INST(OP_CACHE, base, op, offset)
#define I_ERET() __ASM_C_INST(OP_COP0, 1, C0_FUNCT_ERET)
#define I_J(target) __ASM_J_INST(OP_J, (target >> 2))
#define I_JR(rs) __ASM_R_INST(OP_SPECIAL, rs, REG_ZERO, REG_ZERO, 0, FUNCT_JR)
#define I_LBU(rt, offset, base) __ASM_I_INST(OP_LBU, base, rt, offset)
#define I_LHU(rt, offset, base) __ASM_I_INST(OP_LHU, base, rt, offset)
#define I_LUI(rt, immediate) __ASM_I_INST(OP_LUI, 0, rt, immediate)
#define I_LW(rt, offset, base) __ASM_I_INST(OP_LW, base, rt, offset)
#define I_MFC0(rt, rd) __ASM_R_INST(OP_COP0, COPZ_RS_MF, rt, rd, 0, 0)
#define I_MTC0(rt, rd) __ASM_R_INST(OP_COP0, COPZ_RS_MT, rt, rd, 0, 0)
#define I_NOP() __ASM_R_INST(OP_SPECIAL, REG_ZERO, REG_ZERO, REG_ZERO, 0, FUNCT_SSL)
#define I_OR(rd, rs, rt) __ASM_R_INST(OP_SPECIAL, rs, rt, rd, 0, FUNCT_OR)
#define I_ORI(rt, rs, immediate) __ASM_I_INST(OP_ORI, rs, rt, immediate)
#define I_SB(rt, offset, base) __ASM_I_INST(OP_SB, base, rt, offset)
#define I_SH(rt, offset, base) __ASM_I_INST(OP_SH, base, rt, offset)
#define I_SRL(rd, rt, sa) __ASM_R_INST(OP_SPECIAL, 0, rt, rd, sa, FUNCT_SRL)
#define I_SW(rt, offset, base) __ASM_I_INST(OP_SW, base, rt, offset)
#endif

1
src/menu/usb_comm.c
View File

@ -71,6 +71,7 @@ static void command_reboot (menu_t *menu) {
menu->boot_params->device_type = BOOT_DEVICE_TYPE_ROM;
menu->boot_params->tv_type = BOOT_TV_TYPE_PASSTHROUGH;
menu->boot_params->detect_cic_seed = true;
menu->boot_params->cheat_list = NULL;
};
static void command_send_file (menu_t *menu) {

2
src/menu/views/load_disk.c
View File

@ -136,10 +136,12 @@ static void load (menu_t *menu) {
case ROM_TV_TYPE_MPAL: menu->boot_params->tv_type = BOOT_TV_TYPE_MPAL; break;
default: menu->boot_params->tv_type = BOOT_TV_TYPE_PASSTHROUGH; break;
}
menu->boot_params->cheat_list = NULL;
} else {
menu->boot_params->device_type = BOOT_DEVICE_TYPE_64DD;
menu->boot_params->tv_type = BOOT_TV_TYPE_NTSC;
menu->boot_params->detect_cic_seed = true;
menu->boot_params->cheat_list = NULL;
}
}

1
src/menu/views/load_emulator.c
View File

@ -100,6 +100,7 @@ static void load (menu_t *menu) {
menu->boot_params->device_type = BOOT_DEVICE_TYPE_ROM;
menu->boot_params->tv_type = BOOT_TV_TYPE_PASSTHROUGH;
menu->boot_params->detect_cic_seed = true;
menu->boot_params->cheat_list = NULL;
}

1
src/menu/views/load_rom.c
View File

@ -310,6 +310,7 @@ static void load (menu_t *menu) {
case ROM_TV_TYPE_MPAL: menu->boot_params->tv_type = BOOT_TV_TYPE_MPAL; break;
default: menu->boot_params->tv_type = BOOT_TV_TYPE_PASSTHROUGH; break;
}
menu->boot_params->cheat_list = NULL;
}
static void deinit (void) {