+#if M68K_SEPARATE_READS
+/* Read data immediately following the PC */
+inline unsigned int m68k_read_immediate_16(m68ki_cpu_core *state, unsigned int address) {
+#if M68K_EMULATE_PREFETCH == OPT_ON
+ for (int i = 0; i < state->read_ranges; i++) {
+ if(address >= state->read_addr[i] && address < state->read_upper[i]) {
+ return be16toh(((unsigned short *)(state->read_data[i] + (address - state->read_addr[i])))[0]);
+ }
+ }
+#endif
+
+ return m68k_read_memory_16(address);
+}
+inline unsigned int m68k_read_immediate_32(m68ki_cpu_core *state, unsigned int address) {
+#if M68K_EMULATE_PREFETCH == OPT_ON
+ for (int i = 0; i < state->read_ranges; i++) {
+ if(address >= state->read_addr[i] && address < state->read_upper[i]) {
+ return be32toh(((unsigned int *)(state->read_data[i] + (address - state->read_addr[i])))[0]);
+ }
+ }
+#endif
+
+ return m68k_read_memory_32(address);
+}
+
+/* Read data relative to the PC */
+inline unsigned int m68k_read_pcrelative_8(m68ki_cpu_core *state, unsigned int address) {
+ for (int i = 0; i < state->read_ranges; i++) {
+ if(address >= state->read_addr[i] && address < state->read_upper[i]) {
+ return state->read_data[i][address - state->read_addr[i]];
+ }
+ }
+
+ return m68k_read_memory_8(address);
+}
+inline unsigned int m68k_read_pcrelative_16(m68ki_cpu_core *state, unsigned int address) {
+ for (int i = 0; i < state->read_ranges; i++) {
+ if(address >= state->read_addr[i] && address < state->read_upper[i]) {
+ return be16toh(((unsigned short *)(state->read_data[i] + (address - state->read_addr[i])))[0]);
+ }
+ }
+
+ return m68k_read_memory_16(address);
+}
+inline unsigned int m68k_read_pcrelative_32(m68ki_cpu_core *state, unsigned int address) {
+ for (int i = 0; i < state->read_ranges; i++) {
+ if(address >= state->read_addr[i] && address < state->read_upper[i]) {
+ return be32toh(((unsigned int *)(state->read_data[i] + (address - state->read_addr[i])))[0]);
+ }
+ }
+
+ return m68k_read_memory_32(address);
+}
+#endif
+
+
+uint m68ki_read_imm16_addr_slowpath(m68ki_cpu_core *state, uint32_t pc, address_translation_cache *cache)
+{
+ uint32_t address = ADDRESS_68K(pc);
+ uint32_t pc_address_diff = pc - address;
+ for (int i = 0; i < state->read_ranges; i++) {
+ if(address >= state->read_addr[i] && address < state->read_upper[i]) {
+ cache->lower = state->read_addr[i] + pc_address_diff;
+ cache->upper = state->read_upper[i] + pc_address_diff;
+ cache->offset = state->read_data[i] - cache->lower;
+ REG_PC += 2;
+ return be16toh(((unsigned short *)(state->read_data[i] + (address - state->read_addr[i])))[0]);
+ }
+ }
+
+ m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
+ state->mmu_tmp_fc = FLAG_S | FUNCTION_CODE_USER_PROGRAM;
+ state->mmu_tmp_rw = 1;
+ state->mmu_tmp_sz = M68K_SZ_WORD;
+ m68ki_check_address_error(state, REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
+
+#if M68K_EMULATE_PREFETCH
+{
+ uint result;
+ if(REG_PC != CPU_PREF_ADDR)
+ {
+ CPU_PREF_DATA = m68ki_ic_readimm16(state, REG_PC);
+ CPU_PREF_ADDR = state->mmu_tmp_buserror_occurred ? ((uint32)~0) : REG_PC;
+ }
+ result = MASK_OUT_ABOVE_16(CPU_PREF_DATA);
+ REG_PC += 2;
+ if (!state->mmu_tmp_buserror_occurred) {
+ // prefetch only if no bus error occurred in opcode fetch
+ CPU_PREF_DATA = m68ki_ic_readimm16(state, REG_PC);
+ CPU_PREF_ADDR = state->mmu_tmp_buserror_occurred ? ((uint32)~0) : REG_PC;
+ // ignore bus error on prefetch
+ state->mmu_tmp_buserror_occurred = 0;
+ }
+ return result;
+}
+#else
+ REG_PC += 2;
+
+ return m68k_read_immediate_16(address);
+#endif /* M68K_EMULATE_PREFETCH */
+}
+
+
+
+void m68k_add_ram_range(uint32_t addr, uint32_t upper, unsigned char *ptr)
+{
+ m68ki_cpu.code_translation_cache.lower = 0;
+ m68ki_cpu.code_translation_cache.upper = 0;
+ if ((addr == 0 && upper == 0) || upper < addr)
+ return;
+
+ for (int i = 0; i < m68ki_cpu.write_ranges; i++) {
+ if (m68ki_cpu.write_addr[i] == addr || m68ki_cpu.write_data[i] == ptr) {
+ uint8_t changed = 0;
+ if (m68ki_cpu.write_addr[i] != addr) {
+ m68ki_cpu.write_addr[i] = addr;
+ changed = 1;
+ }
+ if (m68ki_cpu.write_upper[i] != upper) {
+ m68ki_cpu.write_upper[i] = upper;
+ changed = 1;
+ }
+ if (m68ki_cpu.write_data[i] != ptr) {
+ m68ki_cpu.write_data[i] = ptr;
+ changed = 1;
+ }
+ if (changed) {
+ printf("[MUSASHI] Adjusted mapped write range %d: %.8X-%.8X (%p)\n", m68ki_cpu.write_ranges, addr, upper, ptr);
+ }
+ return;
+ }
+ }
+
+ if (m68ki_cpu.read_ranges + 1 < 8) {
+ m68ki_cpu.read_addr[m68ki_cpu.read_ranges] = addr;
+ m68ki_cpu.read_upper[m68ki_cpu.read_ranges] = upper;
+ m68ki_cpu.read_data[m68ki_cpu.read_ranges] = ptr;
+ m68ki_cpu.read_ranges++;
+ printf("[MUSASHI] Mapped read range %d: %.8X-%.8X (%p)\n", m68ki_cpu.read_ranges, addr, upper, ptr);
+ }
+ else {
+ printf("Can't Musashi map more than eight RAM/ROM read ranges.\n");
+ }
+ if (m68ki_cpu.write_ranges + 1 < 8) {
+ m68ki_cpu.write_addr[m68ki_cpu.write_ranges] = addr;
+ m68ki_cpu.write_upper[m68ki_cpu.write_ranges] = upper;
+ m68ki_cpu.write_data[m68ki_cpu.write_ranges] = ptr;
+ m68ki_cpu.write_ranges++;
+ printf("[MUSASHI] Mapped write range %d: %.8X-%.8X (%p)\n", m68ki_cpu.write_ranges, addr, upper, ptr);
+ }
+ else {
+ printf("Can't Musashi map more than eight RAM write ranges.\n");
+ }
+}
+
+void m68k_add_rom_range(uint32_t addr, uint32_t upper, unsigned char *ptr)
+{
+ m68ki_cpu.code_translation_cache.lower = 0;
+ m68ki_cpu.code_translation_cache.upper = 0;
+ if ((addr == 0 && upper == 0) || upper < addr)
+ return;
+
+ for (int i = 0; i < m68ki_cpu.read_ranges; i++) {
+ if (m68ki_cpu.read_addr[i] == addr || m68ki_cpu.read_data[i] == ptr) {
+ uint8_t changed = 0;
+ if (m68ki_cpu.read_addr[i] != addr) {
+ m68ki_cpu.read_addr[i] = addr;
+ changed = 1;
+ }
+ if (m68ki_cpu.read_upper[i] != upper) {
+ m68ki_cpu.read_upper[i] = upper;
+ changed = 1;
+ }
+ if (m68ki_cpu.read_data[i] != ptr) {
+ m68ki_cpu.read_data[i] = ptr;
+ changed = 1;
+ }
+ if (changed) {
+ printf("[MUSASHI] Adjusted mapped read range %d: %.8X-%.8X (%p)\n", m68ki_cpu.read_ranges, addr, upper, ptr);
+ }
+ return;
+ }
+ }
+
+ if (m68ki_cpu.read_ranges + 1 < 8) {
+ m68ki_cpu.read_addr[m68ki_cpu.read_ranges] = addr;
+ m68ki_cpu.read_upper[m68ki_cpu.read_ranges] = upper;
+ m68ki_cpu.read_data[m68ki_cpu.read_ranges] = ptr;
+ m68ki_cpu.read_ranges++;
+ printf("[MUSASHI] Mapped read range %d: %.8X-%.8X (%p)\n", m68ki_cpu.read_ranges, addr, upper, ptr);
+ }
+ else {
+ printf("Can't Musashi map more than eight RAM/ROM read ranges.\n");
+ }
+}
+
+void m68k_remove_range(unsigned char *ptr) {
+ if (!ptr) {
+ return;
+ }
+
+ m68ki_cpu.code_translation_cache.lower = 0;
+ m68ki_cpu.code_translation_cache.upper = 0;
+
+ // FIXME: Replace the 8 with a #define, such as MAX_MUSASHI_RANGES
+ for (int i = 0; i < 8; i++) {
+ if (m68ki_cpu.read_data[i] == ptr) {
+ m68ki_cpu.read_data[i] = NULL;
+ m68ki_cpu.read_addr[i] = 0;
+ m68ki_cpu.read_upper[i] = 0;
+ printf("[MUSASHI] Unmapped read range %d.\n", i);
+ for (int j = i; j < 8 - 1; j++) {
+ m68ki_cpu.read_data[j] = m68ki_cpu.read_data[j + 1];
+ m68ki_cpu.read_addr[j] = m68ki_cpu.read_addr[j + 1];
+ m68ki_cpu.read_upper[j] = m68ki_cpu.read_upper[j + 1];
+ }
+ m68ki_cpu.read_data[8 - 1] = NULL;
+ m68ki_cpu.read_addr[8 - 1] = 0;
+ m68ki_cpu.read_upper[8 - 1] = 0;
+ m68ki_cpu.read_ranges--;
+ }
+ if (m68ki_cpu.write_data[i] == ptr) {
+ m68ki_cpu.write_data[i] = NULL;
+ m68ki_cpu.write_addr[i] = 0;
+ m68ki_cpu.write_upper[i] = 0;
+ printf("[MUSASHI] Unmapped write range %d.\n", i);
+ for (int j = i; j < 8 - 1; j++) {
+ m68ki_cpu.write_data[j] = m68ki_cpu.write_data[j + 1];
+ m68ki_cpu.write_addr[j] = m68ki_cpu.write_addr[j + 1];
+ m68ki_cpu.write_upper[j] = m68ki_cpu.write_upper[j + 1];
+ }
+ m68ki_cpu.write_data[8 - 1] = NULL;
+ m68ki_cpu.write_addr[8 - 1] = 0;
+ m68ki_cpu.write_upper[8 - 1] = 0;
+ m68ki_cpu.write_ranges--;
+ }
+ }
+}
+
+void m68k_clear_ranges()
+{
+ printf("[MUSASHI] Clearing all reads/write memory ranges.\n");
+ for (int i = 0; i < 8; i++) {
+ m68ki_cpu.read_upper[i] = 0;
+ m68ki_cpu.read_addr[i] = 0;
+ m68ki_cpu.read_data[i] = NULL;
+ m68ki_cpu.write_upper[i] = 0;
+ m68ki_cpu.write_addr[i] = 0;
+ m68ki_cpu.write_data[i] = NULL;
+ }
+ m68ki_cpu.write_ranges = 0;
+ m68ki_cpu.read_ranges = 0;
+ m68ki_cpu.code_translation_cache.lower = 0;
+ m68ki_cpu.code_translation_cache.upper = 0;
+}
+