diff options
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/amd64/initcpu.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sys/amd64/amd64/initcpu.c b/sys/amd64/amd64/initcpu.c index 37ab866..be86c65 100644 --- a/sys/amd64/amd64/initcpu.c +++ b/sys/amd64/amd64/initcpu.c @@ -164,6 +164,15 @@ init_cy486dx(void) #ifdef CPU_SUSP_HLT ccr2 |= CCR2_SUSP_HLT; #endif + +#ifdef PC98 + /* Enables WB cache interface pin and Lock NW bit in CR0. */ + ccr2 |= CCR2_WB | CCR2_LOCK_NW; + /* Unlock NW bit in CR0. */ + write_cyrix_reg(CCR2, ccr2 & ~CCR2_LOCK_NW); + load_cr0((rcr0() & ~CR0_CD) | CR0_NW); /* CD = 0, NW = 1 */ +#endif + write_cyrix_reg(CCR2, ccr2); write_eflags(eflags); } @@ -561,6 +570,12 @@ initializecpu(void) case CPU_M1SC: need_pre_dma_flush = 1; break; + case CPU_CY486DX: + need_pre_dma_flush = 1; +#ifdef CPU_I486_ON_386 + need_post_dma_flush = 1; +#endif + break; #endif default: break; |
