Hi. Thanks Sorensen and Juergen.
I overlooked the restored to CCR3.
The bit4(0x10, MAPEN) of CCR3 is necessary to access advanced configuration registers.
I'll repost patch.
- restore CCR3
- fix use 0x30 instead of 0x38.
--- linux-2.6.19.orig/arch/i386/kernel/cpu/cyrix.c 2006-11-30 06:57:37.000000000 +0900
+++ linux-2.6.19/arch/i386/kernel/cpu/cyrix.c 2007-01-17 16:15:40.000000000 +0900
@@ -161,19 +161,18 @@ static void __cpuinit set_cx86_inc(void)
static void __cpuinit geode_configure(void)
{
unsigned long flags;
- u8 ccr3, ccr4;
+ u8 ccr3;
local_irq_save(flags);
/* Suspend on halt power saving and enable #SUSP pin */
setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x88);
ccr3 = getCx86(CX86_CCR3);
- setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* Enable */
+ setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* enable MAPEN */
- ccr4 = getCx86(CX86_CCR4);
- ccr4 |= 0x38; /* FPU fast, DTE cache, Mem bypass */
-
- setCx86(CX86_CCR3, ccr3);
+ /* FPU fast, DTE cache, Mem bypass */
+ setCx86(CX86_CCR4, getCx86(CX86_CCR4) | 0x38);
+ setCx86(CX86_CCR3, ccr3); /* disable MAPEN */
set_cx86_memwb();
set_cx86_reorder();
@@ -415,15 +414,14 @@ static void __cpuinit cyrix_identify(str
if (dir0 == 5 || dir0 == 3)
{
- unsigned char ccr3, ccr4;
+ unsigned char ccr3;
unsigned long flags;
printk(KERN_INFO "Enabling CPUID on Cyrix processor.\n");
local_irq_save(flags);
ccr3 = getCx86(CX86_CCR3);
- setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* enable MAPEN */
- ccr4 = getCx86(CX86_CCR4);
- setCx86(CX86_CCR4, ccr4 | 0x80); /* enable cpuid */
- setCx86(CX86_CCR3, ccr3); /* disable MAPEN */
+ setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* enable MAPEN */
+ setCx86(CX86_CCR4, getCx86(CX86_CCR4) | 0x80); /* enable cpuid */
+ setCx86(CX86_CCR3, ccr3); /* disable MAPEN */
local_irq_restore(flags);
}
}
-
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