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Sanity check on reading SCAT registers.

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This commit is contained in:
Miran Grča
2024-04-16 19:40:21 +02:00
committed by GitHub
parent b92995b039
commit 8756a70e38
1 changed files with 11 additions and 6 deletions
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17
src/chipset/scat.c
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@@ -66,15 +66,17 @@ typedef struct ems_page_t {
} ems_page_t; } ems_page_t;
typedef struct scat_t { typedef struct scat_t {
int type; uint8_t max_reg;
uint8_t reg_2xA;
int indx; uint8_t regs[256];
uint8_t regs[256];
uint8_t reg_2xA;
uint32_t xms_bound; uint32_t xms_bound;
int external_is_RAS; int type;
int indx;
int external_is_RAS;
ems_page_t null_page; ems_page_t null_page;
ems_page_t page[32]; ems_page_t page[32];
@@ -1233,7 +1235,8 @@ scat_in(uint16_t port, void *priv)
break; break;
default: default:
ret = dev->regs[dev->indx]; if (dev->index <= dev->max_reg)
ret = dev->regs[dev->indx];
break; break;
} }
break; break;
@@ -1393,6 +1396,8 @@ scat_init(const device_t *info)
sx = (dev->type == 32) ? 1 : 0; sx = (dev->type == 32) ? 1 : 0;
dev->max_reg = sx ? 0x64 : 0x4f;
for (uint32_t i = 0; i < sizeof(dev->regs); i++) for (uint32_t i = 0; i < sizeof(dev->regs); i++)
dev->regs[i] = 0xff; dev->regs[i] = 0xff;