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Implemented Intel 82235 memory remapping capabilities

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This commit is contained in:
Panagiotis
2020-10-19 10:45:50 +03:00
committed by GitHub
parent 4742698c85
commit bd83fe26fe
1 changed files with 12 additions and 1 deletions
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13
src/chipset/intel_82335.c
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@@ -53,6 +53,10 @@
/* Lock status */ /* Lock status */
#define LOCK_STATUS (dev->regs[0x22] & (0x80 << 8)) #define LOCK_STATUS (dev->regs[0x22] & (0x80 << 8))
/* Define Memory Remap Sizes */
#define DEFINE_RC1_REMAP_SIZE ((dev->regs[0x24] & 0x02) ? 128 : 256)
#define DEFINE_RC2_REMAP_SIZE ((dev->regs[0x26] & 0x02) ? 128 : 256)
typedef struct typedef struct
{ {
@@ -83,7 +87,7 @@ static void
intel_82335_write(uint16_t addr, uint16_t val, void *priv) intel_82335_write(uint16_t addr, uint16_t val, void *priv)
{ {
intel_82335_t *dev = (intel_82335_t *) priv; intel_82335_t *dev = (intel_82335_t *) priv;
uint32_t romsize = 0, base = 0, i = 0; uint32_t romsize = 0, base = 0, i = 0, rc1_remap = 0, rc2_remap = 0;
dev->regs[addr] = val; dev->regs[addr] = val;
@@ -115,6 +119,13 @@ intel_82335_write(uint16_t addr, uint16_t val, void *priv)
/* System ROM shadow */ /* System ROM shadow */
mem_set_mem_state_both(0xe0000, 0x20000, (dev->regs[0x22] & 0x01) ? ENABLED_SHADOW : DISABLED_SHADOW); mem_set_mem_state_both(0xe0000, 0x20000, (dev->regs[0x22] & 0x01) ? ENABLED_SHADOW : DISABLED_SHADOW);
} }
break;
case 0x24: /* Roll Compare (Just top remapping. Not followed according to datasheet!) */
case 0x26:
rc1_remap = (dev->regs[0x24] & 0x01) ? DEFINE_RC1_REMAP_SIZE : 0;
rc2_remap = (dev->regs[0x26] & 0x01) ? DEFINE_RC2_REMAP_SIZE : 0;
mem_remap_top(rc1_remap+rc2_remap);
break; break;
case 0x2e: /* Extended Granularity (Enabled if Bit 0 in Register 2Ch is set) */ case 0x2e: /* Extended Granularity (Enabled if Bit 0 in Register 2Ch is set) */