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author | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 11:16:58 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 11:16:58 +0200 |
commit | f7627e2513987bb5d4e8cb13c4e0a478352141ac (patch) | |
tree | 46ef70a107285c1dfe8161a57f433d30252d285a /arch/x86/kernel/cpu/nexgen.c | |
parent | 4ac24f63fd203bc12a841a88a2034dccd358d0d1 (diff) | |
download | linux-f7627e2513987bb5d4e8cb13c4e0a478352141ac.tar.gz linux-f7627e2513987bb5d4e8cb13c4e0a478352141ac.tar.bz2 linux-f7627e2513987bb5d4e8cb13c4e0a478352141ac.zip |
i386: move kernel/cpu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu/nexgen.c')
-rw-r--r-- | arch/x86/kernel/cpu/nexgen.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/nexgen.c b/arch/x86/kernel/cpu/nexgen.c new file mode 100644 index 000000000000..961fbe1a748f --- /dev/null +++ b/arch/x86/kernel/cpu/nexgen.c @@ -0,0 +1,60 @@ +#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; +} |