> In order to know what is correct, what is not, you should do what I wrote
> in my previous email.
>
> --
> Nilay
I found that the kernel gets these values in this function (exists in
linux-2.6.28.4/arch/x86/kernel/cpu/common.c):
void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
{
unsigned int n, dummy, ebx, ecx, edx, l2size;
n = c->extended_cpuid_level;
if (n >= 0x80000005) {
cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d
bytes/line)\n",
edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
c->x86_cache_size = (ecx>>24) + (edx>>24);
the call to cpuid is responsible for getting edx and ecx , this call ultimatley
executes asm code exists in native_cpuid function in
"linux-2.6.28.4/arch/x86/include/asm/processor.h"
static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
/* ecx is often an input as well as an output. */
asm("cpuid"
: "=a" (*eax),
"=b" (*ebx),
"=c" (*ecx),
"=d" (*edx)
: "0" (*eax), "2" (*ecx));
}
but it seems that the asm code is calling cpuid again !
Regards
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