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#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <asm/processor.h>
#include "cpu.h"
/*
* Detect a NexGen CPU running without BIOS hypercode new enough
* to have CPUID. (Thanks to Herbert Oppmann)
*/
static int __cpuinit deep_magic_nexgen_probe(void)
{
int ret;
__asm__ __volatile__ (
" movw $0x5555, %%ax\n"
" xorw %%dx,%%dx\n"
" movw $2, %%cx\n"
" divw %%cx\n"
" movl $0, %%eax\n"
" jnz 1f\n"
" movl $1, %%eax\n"
"1:\n"
: "=a" (ret) : : "cx", "dx");
return ret;
}
static void __cpuinit init_nexgen(struct cpuinfo_x86 *c)
{
c->x86_cache_size = 256; /* A few had 1 MB... */
}
static void __cpuinit nexgen_identify(struct cpuinfo_x86 *c)
{
/* Detect NexGen with old hypercode */
if (deep_magic_nexgen_probe())
strcpy(c->x86_vendor_id, "NexGenDriven");
}
static struct cpu_dev nexgen_cpu_dev __cpuinitdata = {
.c_vendor = "Nexgen",
.c_ident = { "NexGenDriven" },
.c_models = {
{ .vendor = X86_VENDOR_NEXGEN,
.family = 5,
.model_names = { [1] = "Nx586" }
},
},
.c_init = init_nexgen,
.c_identify = nexgen_identify,
};
int __init nexgen_init_cpu(void)
{
cpu_devs[X86_VENDOR_NEXGEN] = &nexgen_cpu_dev;
return 0;
}
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