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Memory mappings can now specify to ignore some address bits, fixes some Cirrus Logic drivers for Windows 3.1x freezing.

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This commit is contained in:
OBattler
2024-12-18 01:19:50 +01:00
parent 11b588c6bb
commit 80a0c48785
3 changed files with 51 additions and 26 deletions
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2
src/include/86box/mem.h
View File

@@ -179,6 +179,7 @@ typedef struct _mem_mapping_ {
uint32_t base;
uint32_t size;
uint32_t base_ignore;
uint32_t mask;
uint8_t (*read_b)(uint32_t addr, void *priv);
@@ -400,6 +401,7 @@ extern void mem_mapping_set_p(mem_mapping_t *, void *priv);
extern void mem_mapping_set_addr(mem_mapping_t *,
uint32_t base, uint32_t size);
extern void mem_mapping_set_base_ignore(mem_mapping_t *, uint32_t base_ignore);
extern void mem_mapping_set_exec(mem_mapping_t *, uint8_t *exec);
extern void mem_mapping_set_mask(mem_mapping_t *, uint32_t mask);
extern void mem_mapping_disable(mem_mapping_t *);

72
src/mem/mem.c
View File

@@ -2351,41 +2351,47 @@ mem_mapping_recalc(uint64_t base, uint64_t size)
/* In range? */
if (map->enable && (uint64_t) map->base < ((uint64_t) base + (uint64_t) size) &&
((uint64_t) map->base + (uint64_t) map->size) > (uint64_t) base) {
uint64_t i_a = (~map->base_ignore) + 0x00000001ULL;
uint64_t i_s = 0x00000000ULL;
uint64_t i_e = map->base_ignore;
uint64_t i_c = 0x00000000ULL;
uint64_t start = (map->base < base) ? map->base : base;
uint64_t end = (((uint64_t) map->base + (uint64_t) map->size) < (base + size)) ?
((uint64_t) map->base + (uint64_t) map->size) : (base + size);
if (start < map->base)
start = map->base;
for (c = start; c < end; c += MEM_GRANULARITY_SIZE) {
/* CPU */
n = !!in_smm;
wp = _mem_wp[c >> MEM_GRANULARITY_BITS];
for (i_c = i_s; i_c <= i_e; i_c += i_a) {
for (c = (start + i_c); c < (end + i_c); c += MEM_GRANULARITY_SIZE) {
/* CPU */
n = !!in_smm;
wp = _mem_wp[c >> MEM_GRANULARITY_BITS];
if (map->exec && mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].x))
_mem_exec[c >> MEM_GRANULARITY_BITS] = map->exec + (c - map->base);
if (!wp && (map->write_b || map->write_w || map->write_l) &&
mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].w))
write_mapping[c >> MEM_GRANULARITY_BITS] = map;
if ((map->read_b || map->read_w || map->read_l) &&
mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].r))
read_mapping[c >> MEM_GRANULARITY_BITS] = map;
if (map->exec && mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].x))
_mem_exec[c >> MEM_GRANULARITY_BITS] = map->exec + (c - map->base);
if (!wp && (map->write_b || map->write_w || map->write_l) &&
mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].w))
write_mapping[c >> MEM_GRANULARITY_BITS] = map;
if ((map->read_b || map->read_w || map->read_l) &&
mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].r))
read_mapping[c >> MEM_GRANULARITY_BITS] = map;
/* Bus */
n |= STATE_BUS;
wp = _mem_wp_bus[c >> MEM_GRANULARITY_BITS];
/* Bus */
n |= STATE_BUS;
wp = _mem_wp_bus[c >> MEM_GRANULARITY_BITS];
if (!wp && (map->write_b || map->write_w || map->write_l) &&
mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].w))
write_mapping_bus[c >> MEM_GRANULARITY_BITS] = map;
if ((map->read_b || map->read_w || map->read_l) &&
mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].r))
read_mapping_bus[c >> MEM_GRANULARITY_BITS] = map;
if (!wp && (map->write_b || map->write_w || map->write_l) &&
mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].w))
write_mapping_bus[c >> MEM_GRANULARITY_BITS] = map;
if ((map->read_b || map->read_w || map->read_l) &&
mem_mapping_access_allowed(map->flags,
_mem_state[c >> MEM_GRANULARITY_BITS].states[n].r))
read_mapping_bus[c >> MEM_GRANULARITY_BITS] = map;
}
}
}
map = map->next;
@@ -2597,6 +2603,20 @@ mem_mapping_set_addr(mem_mapping_t *map, uint32_t base, uint32_t size)
mem_mapping_recalc(map->base, map->size);
}
void
mem_mapping_set_base_ignore(mem_mapping_t *map, uint32_t base_ignore)
{
/* Remove old mapping. */
map->enable = 0;
mem_mapping_recalc(map->base, map->size);
/* Set new mapping. */
map->enable = 1;
map->base_ignore = base_ignore;
mem_mapping_recalc(map->base, map->size);
}
void
mem_mapping_set_exec(mem_mapping_t *map, uint8_t *exec)
{

3
src/video/vid_cl54xx.c
View File

@@ -4306,6 +4306,9 @@ gd54xx_init(const device_t *info)
mem_mapping_disable(&gd54xx->bios_rom.mapping);
}
if ((svga->crtc[0x27] <= CIRRUS_ID_CLGD5429) || (!gd54xx->pci && !gd54xx->vlb))
mem_mapping_set_base_ignore(&gd54xx->linear_mapping, 0xff000000);
mem_mapping_set_p(&svga->mapping, gd54xx);
mem_mapping_disable(&gd54xx->mmio_mapping);
mem_mapping_disable(&gd54xx->linear_mapping);