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ISA ROM system cleanups

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This commit is contained in:
RichardG867
2025-07-10 12:06:59 -03:00
parent e7d0f153ae
commit 030c25cf2d
1 changed files with 41 additions and 30 deletions
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65
src/device/isarom.c
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@@ -26,9 +26,11 @@
#include <86box/nvr.h>
#include <86box/isarom.h>
#define ISAROM_CARD 0
#define ISAROM_CARD_DUAL 1
#define ISAROM_CARD_QUAD 2
enum {
ISAROM_CARD = 0,
ISAROM_CARD_DUAL,
ISAROM_CARD_QUAD
};
#ifdef ENABLE_ISAROM_LOG
int isarom_do_log = ENABLE_ISAROM_LOG;
@@ -56,7 +58,7 @@ typedef struct isarom_t {
uint32_t size;
uint32_t len;
char nvr_path[64];
uint8_t wp;
uint8_t writable;
} socket[4];
uint8_t inst;
uint8_t type;
@@ -65,12 +67,15 @@ typedef struct isarom_t {
static inline uint8_t
get_limit(uint8_t type)
{
if (type == ISAROM_CARD_DUAL)
switch (type) {
case ISAROM_CARD_DUAL:
return 2;
if (type == ISAROM_CARD_QUAD)
case ISAROM_CARD_QUAD:
return 4;
default:
return 1;
}
}
static inline void
isarom_save_nvr(char *path, uint8_t *data, size_t size)
@@ -92,12 +97,13 @@ isarom_close(void *priv)
if (!priv)
return;
for (uint8_t i = 0; i < get_limit(dev->type); i++)
if (dev->socket[i].rom.rom) {
for (uint8_t i = 0; i < get_limit(dev->type); i++) {
if (dev->socket[i].writable) {
isarom_log("isarom[%u]: saving NVR for socket %u -> %s (%u bytes)\n",
dev->inst, i, dev->socket[i].nvr_path, dev->socket[i].size);
isarom_save_nvr(dev->socket[i].nvr_path, dev->socket[i].rom.rom, dev->socket[i].size);
}
}
free(dev);
}
@@ -115,32 +121,37 @@ isarom_init(const device_t *info)
isarom_log("isarom[%u]: initializing device (type=%u)\n", dev->inst, dev->type);
for (uint8_t i = 0; i < get_limit(dev->type); i++) {
char key_fn[12];
char key_addr[14];
char key_size[14];
char key_writes[22];
char s[22];
char suffix[4] = "";
if (i > 0)
snprintf(suffix, sizeof(suffix), "%d", i + 1);
snprintf(key_fn, sizeof(key_fn), "bios_fn%s", suffix);
snprintf(key_addr, sizeof(key_addr), "bios_addr%s", suffix);
snprintf(key_size, sizeof(key_size), "bios_size%s", suffix);
snprintf(key_writes, sizeof(key_writes), "rom_writes_enabled%s", suffix);
snprintf(s, sizeof(s), "bios_addr%s", suffix);
dev->socket[i].addr = device_get_config_hex20(s);
dev->socket[i].fn = device_get_config_string(key_fn);
dev->socket[i].addr = device_get_config_hex20(key_addr);
dev->socket[i].size = device_get_config_int(key_size);
// Note: 2K is the smallest ROM I've found, but 86box's memory granularity is 4k, the number below is fine
// as we'll end up allocating no less than 4k due to the device config limits.
dev->socket[i].len = (dev->socket[i].size > 2048) ? dev->socket[i].size - 1 : 0;
dev->socket[i].wp = (uint8_t) device_get_config_int(key_writes) ? 1 : 0;
switch (dev->type) {
default:
snprintf(s, sizeof(s), "bios_fn%s", suffix);
dev->socket[i].fn = device_get_config_string(s);
isarom_log("isarom[%u]: socket %u: addr=0x%05X size=%u wp=%u fn=%s\n",
snprintf(s, sizeof(s), "bios_size%s", suffix);
dev->socket[i].size = device_get_config_int(s);
snprintf(s, sizeof(s), "rom_writes_enabled%s", suffix);
if (device_get_config_int(s))
dev->socket[i].writable = 1;
break;
}
/* Note: 2K is the smallest ROM I've found, but 86Box's memory granularity is 4K, the number
below is fine as we'll end up allocating no less than 4K due to the device config limits. */
dev->socket[i].len = (dev->socket[i].size > 0) ? ((dev->socket[i].size - 1) | MEM_GRANULARITY_MASK) : 0;
isarom_log("isarom[%u]: socket %u: addr=0x%05X size=%u writable=%u fn=%s\n",
dev->inst, i, dev->socket[i].addr, dev->socket[i].size,
dev->socket[i].wp, dev->socket[i].fn ? dev->socket[i].fn : "(null)");
dev->socket[i].writable, dev->socket[i].fn ? dev->socket[i].fn : "(null)");
if (dev->socket[i].addr != 0 && dev->socket[i].fn != NULL) {
if ((dev->socket[i].addr != 0) && (dev->socket[i].fn != NULL)) {
rom_init(&dev->socket[i].rom,
dev->socket[i].fn,
dev->socket[i].addr,
@@ -151,7 +162,7 @@ isarom_init(const device_t *info)
isarom_log("isarom[%u]: ROM initialized for socket %u\n", dev->inst, i);
if (dev->socket[i].wp) {
if (dev->socket[i].writable) {
mem_mapping_set_write_handler(&dev->socket[i].rom.mapping, rom_write, rom_writew, rom_writel);
snprintf(dev->socket[i].nvr_path, sizeof(dev->socket[i].nvr_path), "isarom_%i_%i.nvr", dev->inst, i + 1);
FILE *fp = nvr_fopen(dev->socket[i].nvr_path, "rb");