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intel-2D: move to sdk/sources

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git-svn-id: svn://kolibrios.org@4359 a494cfbc-eb01-0410-851d-a64ba20cac60
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Sergey Semyonov (Serge)
2013-12-15 11:38:32 +00:00
parent 0d733fd5e8
commit ab3eee4bd8
192 changed files with 0 additions and 0 deletions
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150
contrib/sdk/sources/Intel-2D/sna/utils.c Normal file
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#include <stdint.h>
#include <stdio.h>
static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
/* ecx is often an input as well as an output. */
asm volatile("cpuid"
: "=a" (*eax),
"=b" (*ebx),
"=c" (*ecx),
"=d" (*edx)
: "0" (*eax), "2" (*ecx)
: "memory");
}
/* Some CPUID calls want 'count' to be placed in ecx */
static inline void cpuid_count(unsigned int op, int count,
unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
*eax = op;
*ecx = count;
native_cpuid(eax, ebx, ecx, edx);
}
enum _cache_type {
CACHE_TYPE_NULL = 0,
CACHE_TYPE_DATA = 1,
CACHE_TYPE_INST = 2,
CACHE_TYPE_UNIFIED = 3
};
union _cpuid4_leaf_eax {
struct {
enum _cache_type type:5;
unsigned int level:3;
unsigned int is_self_initializing:1;
unsigned int is_fully_associative:1;
unsigned int reserved:4;
unsigned int num_threads_sharing:12;
unsigned int num_cores_on_die:6;
} split;
uint32_t full;
};
union _cpuid4_leaf_ebx {
struct {
unsigned int coherency_line_size:12;
unsigned int physical_line_partition:10;
unsigned int ways_of_associativity:10;
} split;
uint32_t full;
};
union _cpuid4_leaf_ecx {
struct {
unsigned int number_of_sets:32;
} split;
uint32_t full;
};
struct _cpuid4_info_regs {
union _cpuid4_leaf_eax eax;
union _cpuid4_leaf_ebx ebx;
union _cpuid4_leaf_ecx ecx;
unsigned long size;
};
static int
cpuid4_cache_lookup_regs(int index,
struct _cpuid4_info_regs *this_leaf)
{
union _cpuid4_leaf_eax eax;
union _cpuid4_leaf_ebx ebx;
union _cpuid4_leaf_ecx ecx;
unsigned edx;
cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx);
if (eax.split.type == CACHE_TYPE_NULL)
return -1; /* better error ? */
this_leaf->eax = eax;
this_leaf->ebx = ebx;
this_leaf->ecx = ecx;
this_leaf->size = (ecx.split.number_of_sets + 1) *
(ebx.split.coherency_line_size + 1) *
(ebx.split.physical_line_partition + 1) *
(ebx.split.ways_of_associativity + 1);
return 0;
}
static int find_num_cache_leaves()
{
unsigned int eax, ebx, ecx, edx, op;
union _cpuid4_leaf_eax cache_eax;
int i = -1;
do {
++i;
/* Do cpuid(op) loop to find out num_cache_leaves */
cpuid_count(4, i, &eax, &ebx, &ecx, &edx);
cache_eax.full = eax;
} while (cache_eax.split.type != CACHE_TYPE_NULL);
return i;
};
unsigned int cpu_cache_size()
{
unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */
unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */
unsigned int num_cache_leaves;
num_cache_leaves = find_num_cache_leaves();
for (i = 0; i < num_cache_leaves; i++)
{
struct _cpuid4_info_regs this_leaf;
int retval;
retval = cpuid4_cache_lookup_regs(i, &this_leaf);
if (retval >= 0) {
switch (this_leaf.eax.split.level)
{
case 1:
if (this_leaf.eax.split.type == CACHE_TYPE_DATA)
new_l1d = this_leaf.size;
else if (this_leaf.eax.split.type == CACHE_TYPE_INST)
new_l1i = this_leaf.size;
break;
case 2:
new_l2 = this_leaf.size;
break;
case 3:
new_l3 = this_leaf.size;
break;
default:
break;
}
}
}
printf("l2 cache %d l3 cache %d\n", new_l2, new_l3);
return new_l3 != 0 ? new_l3 : new_l2;
};