| #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 __init 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 __init init_nexgen(struct cpuinfo_x86 * c) |
| { |
| c->x86_cache_size = 256; /* A few had 1 MB... */ |
| } |
| |
| static void __init nexgen_identify(struct cpuinfo_x86 * c) |
| { |
| /* Detect NexGen with old hypercode */ |
| if ( deep_magic_nexgen_probe() ) { |
| strcpy(c->x86_vendor_id, "NexGenDriven"); |
| } |
| generic_identify(c); |
| } |
| |
| static struct cpu_dev nexgen_cpu_dev __initdata = { |
| .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; |
| } |
| |
| //early_arch_initcall(nexgen_init_cpu); |