Commit 76d08bb3 authored by Tony Luck's avatar Tony Luck
Browse files

[IA64] Add "model name" to /proc/cpuinfo 



Linux ia64 port tried to decode the processor family number
to something human-readable, but Intel brandnames don't change
synchronously with updates to the family number.  Adopt a more
i386-like approach and just print the family number in decimal.
Add a new field "model name" that uses PAL_BRAND_INFO to find
the official name for the cpu, or on older systems, falls back
to using the well-known codenames (Merced, McKinley, Madison).

Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 672c6108

arch/ia64/kernel/setup.c

+31 −10
Original line number Diff line number Diff line
@@ -509,7 +509,7 @@ show_cpuinfo (struct seq_file *m, void *v) 
		{ 1UL << 1, "spontaneous deferral"},

		{ 1UL << 2, "16-byte atomic ops" }

	};

	char family[32], features[128], *cp, sep;

	char features[128], *cp, sep;

	struct cpuinfo_ia64 *c = v;

	unsigned long mask;

	unsigned long proc_freq;
@@ -517,12 +517,6 @@ show_cpuinfo (struct seq_file *m, void *v) 


	mask = c->features;



	switch (c->family) {

	      case 0x07:	memcpy(family, "Itanium", 8); break;

	      case 0x1f:	memcpy(family, "Itanium 2", 10); break;

	      default:		sprintf(family, "%u", c->family); break;

	}



	/* build the feature string: */

	memcpy(features, " standard", 10);

	cp = features;
@@ -553,8 +547,9 @@ show_cpuinfo (struct seq_file *m, void *v) 
		   "processor  : %d\n"

		   "vendor     : %s\n"

		   "arch       : IA-64\n"

		   "family     : %s\n"

		   "family     : %u\n"

		   "model      : %u\n"

		   "model name : %s\n"

		   "revision   : %u\n"

		   "archrev    : %u\n"

		   "features   :%s\n"	/* don't change this---it _is_ right! */
@@ -563,7 +558,8 @@ show_cpuinfo (struct seq_file *m, void *v) 
		   "cpu MHz    : %lu.%06lu\n"

		   "itc MHz    : %lu.%06lu\n"

		   "BogoMIPS   : %lu.%02lu\n",

		   cpunum, c->vendor, family, c->model, c->revision, c->archrev,

		   cpunum, c->vendor, c->family, c->model,

		   c->model_name, c->revision, c->archrev,

		   features, c->ppn, c->number,

		   proc_freq / 1000, proc_freq % 1000,

		   c->itc_freq / 1000000, c->itc_freq % 1000000,
@@ -611,6 +607,31 @@ struct seq_operations cpuinfo_op = { 
	.show =		show_cpuinfo

};



static char brandname[128];



static char * __cpuinit

get_model_name(__u8 family, __u8 model)

{

	char brand[128];



	if (ia64_pal_get_brand_info(brand)) {

		if (family == 0x7)

			memcpy(brand, "Merced", 7);

		else if (family == 0x1f) switch (model) {

			case 0: memcpy(brand, "McKinley", 9); break;

			case 1: memcpy(brand, "Madison", 8); break;

			case 2: memcpy(brand, "Madison up to 9M cache", 23); break;

		} else

			memcpy(brand, "Unknown", 8);

	}

	if (brandname[0] == '\0')

		return strcpy(brandname, brand);

	else if (strcmp(brandname, brand) == 0)

		return brandname;

	else

		return kstrdup(brand, GFP_KERNEL);

}



static void __cpuinit

identify_cpu (struct cpuinfo_ia64 *c)

{
@@ -640,7 +661,6 @@ identify_cpu (struct cpuinfo_ia64 *c) 
	pal_status_t status;

	unsigned long impl_va_msb = 50, phys_addr_size = 44;	/* Itanium defaults */

	int i;



	for (i = 0; i < 5; ++i)

		cpuid.bits[i] = ia64_get_cpuid(i);
@@ -663,6 +683,7 @@ identify_cpu (struct cpuinfo_ia64 *c) 
	c->family = cpuid.field.family;

	c->archrev = cpuid.field.archrev;

	c->features = cpuid.field.features;

	c->model_name = get_model_name(c->family, c->model);



	status = ia64_pal_vm_summary(&vm1, &vm2);

	if (status == PAL_STATUS_SUCCESS) {

include/asm-ia64/pal.h

+10 −0
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ 
#define PAL_VM_TR_READ		261	/* read contents of translation register */

#define PAL_GET_PSTATE		262	/* get the current P-state */

#define PAL_SET_PSTATE		263	/* set the P-state */

#define PAL_BRAND_INFO		274	/* Processor branding information */



#ifndef __ASSEMBLY__
@@ -1133,6 +1134,15 @@ ia64_pal_set_pstate (u64 pstate_index) 
	return iprv.status;

}



/* Processor branding information*/

static inline s64

ia64_pal_get_brand_info (char *brand_info)

{

	struct ia64_pal_retval iprv;

	PAL_CALL_STK(iprv, PAL_BRAND_INFO, 0, (u64)brand_info, 0);

	return iprv.status;

}



/* Cause the processor to enter LIGHT HALT state, where prefetching and execution are

 * suspended, but cache and TLB coherency is maintained.

 */

include/asm-ia64/processor.h

+1 −0
Original line number Diff line number Diff line
@@ -164,6 +164,7 @@ struct cpuinfo_ia64 { 
	__u8 family;

	__u8 archrev;

	char vendor[16];

	char *model_name;



#ifdef CONFIG_NUMA

	struct ia64_node_data *node_data;

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