+// SPDX-License-Identifier: MIT
+
#include "config_file/config_file.h"
#include "m68k.h"
-#include "Gayle.h"
+#include "platforms/amiga/Gayle.h"
#include <endian.h>
#define CHKRANGE(a, b, c) a >= (unsigned int)b && a < (unsigned int)(b + c)
+#define CHKRANGE_ABS(a, b, c) a >= (unsigned int)b && a < (unsigned int) c
static unsigned int target;
+extern int ovl;
extern const char *map_type_names[MAPTYPE_NUM];
const char *op_type_names[OP_TYPE_NUM] = {
"MEM",
};
-inline int handle_mapped_read(struct emulator_config *cfg, unsigned int addr, unsigned int *val, unsigned char type, unsigned char mirror) {
+inline int handle_mapped_read(struct emulator_config *cfg, unsigned int addr, unsigned int *val, unsigned char type) {
unsigned char *read_addr = NULL;
- char handle_regs = 0;
-
- //printf("Mapped read: %.8x\n", addr);
for (int i = 0; i < MAX_NUM_MAPPED_ITEMS; i++) {
if (cfg->map_type[i] == MAPTYPE_NONE)
continue;
- switch(cfg->map_type[i]) {
- case MAPTYPE_ROM:
- if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i]))
- read_addr = cfg->map_data[i] + ((addr - cfg->map_offset[i]) % cfg->rom_size[i]);
- else if (cfg->map_mirror[i] != -1 && mirror && CHKRANGE(addr, cfg->map_mirror[i], cfg->map_size[i]))
- read_addr = cfg->map_data[i] + ((addr - cfg->map_mirror[i]) % cfg->rom_size[i]);
- break;
- case MAPTYPE_RAM:
- if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i]))
- read_addr = cfg->map_data[i] + (addr - cfg->map_offset[i]);
- break;
- case MAPTYPE_REGISTER:
- if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i]))
- handle_regs = 1;
- break;
- }
-
- if (!read_addr && !handle_regs)
- continue;
-
- if (handle_regs) {
- if (cfg->platform && cfg->platform->register_read) {
- if (cfg->platform->register_read(addr, type, &target) != -1) {
- *val = target;
- return 1;
- }
+ else if (ovl && (cfg->map_type[i] == MAPTYPE_ROM || cfg->map_type[i] == MAPTYPE_RAM_WTC)) {
+ if (cfg->map_mirror[i] != ((unsigned int)-1) && CHKRANGE(addr, cfg->map_mirror[i], cfg->map_size[i])) {
+ read_addr = cfg->map_data[i] + ((addr - cfg->map_mirror[i]) % cfg->rom_size[i]);
+ goto read_value;
}
- return -1;
}
- else if (read_addr) {
- //printf("[PC: %.8X] Read %s from %s (%.8X) (%d)\n", m68k_get_reg(NULL, M68K_REG_PC), op_type_names[type], map_type_names[cfg->map_type[i]], addr, mirror);
- //printf("Readaddr: %.8lX (Base %.8lX\n", (uint64_t)(read_addr), (uint64_t)cfg->map_data[i]);
- switch(type) {
- case OP_TYPE_BYTE:
- *val = read_addr[0];
- //printf("Read val: %.8lX (%d)\n", (uint64_t)val, *val);
- return 1;
- break;
- case OP_TYPE_WORD:
- *val = be16toh(((unsigned short *)read_addr)[0]);
- //printf("Read val: %.8lX (%d)\n", (uint64_t)val, *val);
- return 1;
+ if (CHKRANGE_ABS(addr, cfg->map_offset[i], cfg->map_high[i])) {
+ switch(cfg->map_type[i]) {
+ case MAPTYPE_ROM:
+ read_addr = cfg->map_data[i] + ((addr - cfg->map_offset[i]) % cfg->rom_size[i]);
+ goto read_value;
break;
- case OP_TYPE_LONGWORD:
- *val = be32toh(((unsigned int *)read_addr)[0]);
- //printf("Read val: %.8lX (%d)\n", (uint64_t)val, *val);
- return 1;
+ case MAPTYPE_RAM:
+ case MAPTYPE_RAM_WTC:
+ case MAPTYPE_RAM_NOALLOC:
+ read_addr = cfg->map_data[i] + (addr - cfg->map_offset[i]);
+ goto read_value;
break;
- case OP_TYPE_MEM:
+ case MAPTYPE_REGISTER:
+ if (cfg->platform && cfg->platform->register_read) {
+ if (cfg->platform->register_read(addr, type, &target) != -1) {
+ *val = target;
+ return 1;
+ }
+ }
return -1;
break;
}
}
return -1;
+
+read_value:;
+ switch(type) {
+ case OP_TYPE_BYTE:
+ *val = read_addr[0];
+ return 1;
+ break;
+ case OP_TYPE_WORD:
+ *val = be16toh(((unsigned short *)read_addr)[0]);
+ return 1;
+ break;
+ case OP_TYPE_LONGWORD:
+ *val = be32toh(((unsigned int *)read_addr)[0]);
+ return 1;
+ break;
+ case OP_TYPE_MEM:
+ return -1;
+ break;
+ }
+
+ return 1;
}
-inline int handle_mapped_write(struct emulator_config *cfg, unsigned int addr, unsigned int value, unsigned char type, unsigned char mirror) {
+inline int handle_mapped_write(struct emulator_config *cfg, unsigned int addr, unsigned int value, unsigned char type) {
+ int res = -1;
unsigned char *write_addr = NULL;
- char handle_regs = 0;
-
- //printf("Mapped write: %.8x\n", addr);
- if (mirror) { }
for (int i = 0; i < MAX_NUM_MAPPED_ITEMS; i++) {
if (cfg->map_type[i] == MAPTYPE_NONE)
continue;
- switch(cfg->map_type[i]) {
- case MAPTYPE_ROM:
- if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i]))
- return 1;
- break;
- case MAPTYPE_RAM:
- if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i]))
- write_addr = cfg->map_data[i] + (addr - cfg->map_offset[i]);
- break;
- case MAPTYPE_REGISTER:
- if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i]))
- handle_regs = 1;
- break;
- }
-
- if (!write_addr && !handle_regs)
- continue;
-
- if (handle_regs) {
- if (cfg->platform && cfg->platform->register_write) {
- return cfg->platform->register_write(addr, value, type);
+ else if (ovl && cfg->map_type[i] == MAPTYPE_RAM_WTC) {
+ if (cfg->map_mirror[i] != ((unsigned int)-1) && CHKRANGE(addr, cfg->map_mirror[i], cfg->map_size[i])) {
+ write_addr = cfg->map_data[i] + ((addr - cfg->map_mirror[i]) % cfg->rom_size[i]);
+ res = -1;
+ goto write_value;
}
}
- else if (write_addr) {
- //printf("[PC: %.8X] Write %s to %s (%.8X) (%d)\n", m68k_get_reg(NULL, M68K_REG_PC), op_type_names[type], map_type_names[cfg->map_type[i]], addr, mirror);
- //printf("Writeaddr: %.8lX (Base %.8lX\n", (uint64_t)(write_addr), (uint64_t)cfg->map_data[i]);
- switch(type) {
- case OP_TYPE_BYTE:
- write_addr[0] = (unsigned char)value;
- //printf("Write val: %.8X (%d)\n", (uint32_t)value, value);
+ else if (CHKRANGE_ABS(addr, cfg->map_offset[i], cfg->map_high[i])) {
+ switch(cfg->map_type[i]) {
+ case MAPTYPE_ROM:
return 1;
break;
- case OP_TYPE_WORD:
- ((short *)write_addr)[0] = htobe16(value);
- //printf("Write val: %.8X (%d)\n", (uint32_t)value, value);
- return 1;
+ case MAPTYPE_RAM:
+ case MAPTYPE_RAM_NOALLOC:
+ write_addr = cfg->map_data[i] + (addr - cfg->map_offset[i]);
+ res = 1;
+ goto write_value;
break;
- case OP_TYPE_LONGWORD:
- ((int *)write_addr)[0] = htobe32(value);
- //printf("Write val: %.8X (%d)\n", (uint32_t)value, value);
- return 1;
+ case MAPTYPE_RAM_WTC:
+ //printf("Some write to WTC RAM.\n");
+ write_addr = cfg->map_data[i] + (addr - cfg->map_offset[i]);
+ res = -1;
+ goto write_value;
break;
- case OP_TYPE_MEM:
- return -1;
+ case MAPTYPE_REGISTER:
+ if (cfg->platform && cfg->platform->register_write) {
+ return cfg->platform->register_write(addr, value, type);
+ }
break;
}
}
}
- return -1;
+ return res;
+
+write_value:;
+ switch(type) {
+ case OP_TYPE_BYTE:
+ write_addr[0] = (unsigned char)value;
+ return res;
+ break;
+ case OP_TYPE_WORD:
+ ((short *)write_addr)[0] = htobe16(value);
+ return res;
+ break;
+ case OP_TYPE_LONGWORD:
+ ((int *)write_addr)[0] = htobe32(value);
+ return res;
+ break;
+ case OP_TYPE_MEM:
+ return -1;
+ break;
+ }
+
+ // This should never actually happen.
+ return res;
}
projects / pistorm / blobdiff