path: root/arch/x86/kernel/cpu/intel_cacheinfo.c

/*
 *	Routines to indentify caches on Intel CPU.
 *
 *	Changes:
 *	Venkatesh Pallipadi	: Adding cache identification through cpuid(4)
 *	Ashok Raj <ashok.raj@intel.com>: Work with CPU hotplug infrastructure.
 *	Andi Kleen / Andreas Herrmann	: CPUID4 emulation on AMD.
 */

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/compiler.h>
#include <linux/cpu.h>
#include <linux/sched.h>
#include <linux/pci.h>

#include <asm/processor.h>
#include <linux/smp.h>
#include <asm/amd_nb.h>
#include <asm/smp.h>

#define LVL_1_INST	1
#define LVL_1_DATA	2
#define LVL_2		3
#define LVL_3		4
#define LVL_TRACE	5

struct _cache_table {
	unsigned char descriptor;
	char cache_type;
	short size;
};

#define MB(x)	((x) * 1024)

/* All the cache descriptor types we care about (no TLB or
   trace cache entries) */

static const struct _cache_table __cpuinitconst cache_table[] =
{
	{ 0x06, LVL_1_INST, 8 },	/* 4-way set assoc, 32 byte line size */
	{ 0x08, LVL_1_INST, 16 },	/* 4-way set assoc, 32 byte line size */
	{ 0x09, LVL_1_INST, 32 },	/* 4-way set assoc, 64 byte line size */
	{ 0x0a, LVL_1_DATA, 8 },	/* 2 way set assoc, 32 byte line size */
	{ 0x0c, LVL_1_DATA, 16 },	/* 4-way set assoc, 32 byte line size */
	{ 0x0d, LVL_1_DATA, 16 },	/* 4-way set assoc, 64 byte line size */
	{ 0x21, LVL_2,      256 },	/* 8-way set assoc, 64 byte line size */
	{ 0x22, LVL_3,      512 },	/* 4-way set assoc, sectored cache, 64 byte line size */
	{ 0x23, LVL_3,      MB(1) },	/* 8-way set assoc, sectored cache, 64 byte line size */
	{ 0x25, LVL_3,      MB(2) },	/* 8-way set assoc, sectored cache, 64 byte line size */
	{ 0x29, LVL_3,      MB(4) },	/* 8-way set assoc, sectored cache, 64 byte line size */
	{ 0x2c, LVL_1_DATA, 32 },	/* 8-way set assoc, 64 byte line size */
	{ 0x30, LVL_1_INST, 32 },	/* 8-way set assoc, 64 byte line size */
	{ 0x39, LVL_2,      128 },	/* 4-way set assoc, sectored cache, 64 byte line size */
	{ 0x3a, LVL_2,      192 },	/* 6-way set assoc, sectored cache, 64 byte line size */
	{ 0x3b, LVL_2,      128 },	/* 2-way set assoc, sectored cache, 64 byte line size */
	{ 0x3c, LVL_2,      256 },	/* 4-way set assoc, sectored cache, 64 byte line size */
	{ 0x3d, LVL_2,      384 },	/* 6-way set assoc, sectored cache, 64 byte line size */
	{ 0x3e, LVL_2,      512 },	/* 4-way set assoc, sectored cache, 64 byte line size */
	{ 0x3f, LVL_2,      256 },	/* 2-way set assoc, 64 byte line size */
	{ 0x41, LVL_2,      128 },	/* 4-way set assoc, 32 byte line size */
	{ 0x42, LVL_2,      256 },	/* 4-way set assoc, 32 byte line size */
	{ 0x43, LVL_2,      512 },	/* 4-way set assoc, 32 byte line size */
	{ 0x44, LVL_2,      MB(1) },	/* 4-way set assoc, 32 byte line size */
	{ 0x45, LVL_2,      MB(2) },	/* 4-way set assoc, 32 byte line size */
	{ 0x46, LVL_3,      MB(4) },	/* 4-way set assoc, 64 byte line size */
	{ 0x47, LVL_3,      MB(8) },	/* 8-way set assoc, 64 byte line size */
	{ 0x49, LVL_3,      MB(4) },	/* 16-way set assoc, 64 byte line size */
	{ 0x4a, LVL_3,      MB(6) },	/* 12-way set assoc, 64 byte line size */
	{ 0x4b, LVL_3,      MB(8) },	/* 16-way set assoc, 64 byte line size */
	{ 0x4c, LVL_3,      MB(12)