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/* SPDX-License-Identifier: GPL-2.0-only */
#include <cpu/cpu.h>
#if ENV_X86_32
/* Standard macro to see if a specific flag is changeable */
static inline int flag_is_changeable_p(uint32_t flag)
{
uint32_t f1, f2;
asm(
"pushfl\n\t"
"pushfl\n\t"
"popl %0\n\t"
"movl %0,%1\n\t"
"xorl %2,%0\n\t"
"pushl %0\n\t"
"popfl\n\t"
"pushfl\n\t"
"popl %0\n\t"
"popfl\n\t"
: "=&r" (f1), "=&r" (f2)
: "ir" (flag));
return ((f1^f2) & flag) != 0;
}
/* Probe for the CPUID instruction */
int cpu_have_cpuid(void)
{
return flag_is_changeable_p(X86_EFLAGS_ID);
}
#else
int cpu_have_cpuid(void)
{
return 1;
}
#endif
unsigned int cpu_cpuid_extended_level(void)
{
return cpuid_eax(0x80000000);
}
int cpu_phys_address_size(void)
{
if (!(cpu_have_cpuid()))
return 32;
if (cpu_cpuid_extended_level() >= 0x80000008)
return cpuid_eax(0x80000008) & 0xff;
if (cpuid_edx(1) & (CPUID_FEATURE_PAE | CPUID_FEATURE_PSE36))
return 36;
return 32;
}
/*
* Get processor id using cpuid eax=1
* return value in EAX register
*/
uint32_t cpu_get_cpuid(void)
{
return cpuid_eax(1);
}
/*
* Get processor feature flag using cpuid eax=1
* return value in ECX register
*/
uint32_t cpu_get_feature_flags_ecx(void)
{
return cpuid_ecx(1);
}
/*
* Get processor feature flag using cpuid eax=1
* return value in EDX register
*/
uint32_t cpu_get_feature_flags_edx(void)
{
return cpuid_edx(1);
}
enum cpu_type cpu_check_deterministic_cache_cpuid_supported(void)
{
struct cpuid_result res;
if (cpu_is_intel()) {
res = cpuid(0);
if (res.eax < 4)
return CPUID_COMMAND_UNSUPPORTED;
return CPUID_TYPE_INTEL;
} else if (cpu_is_amd()) {
res = cpuid(0x80000000);
if (res.eax < 0x80000001)
return CPUID_COMMAND_UNSUPPORTED;
res = cpuid(0x80000001);
if (!(res.ecx & (1 << 22)))
return CPUID_COMMAND_UNSUPPORTED;
return CPUID_TYPE_AMD;
} else {
return CPUID_TYPE_INVALID;
}
}
static uint32_t cpu_get_cache_info_leaf(void)
{
uint32_t leaf = (cpu_check_deterministic_cache_cpuid_supported() == CPUID_TYPE_AMD) ?
DETERMINISTIC_CACHE_PARAMETERS_CPUID_AMD :
DETERMINISTIC_CACHE_PARAMETERS_CPUID_IA;
return leaf;
}
size_t cpu_get_cache_ways_assoc_info(const struct cpu_cache_info *info)
{
if (!info)
return 0;
return info->num_ways;
}
uint8_t cpu_get_cache_type(const struct cpu_cache_info *info)
{
if (!info)
return 0;
return info->type;
}
uint8_t cpu_get_cache_level(const struct cpu_cache_info *info)
{
if (!info)
return 0;
return info->level;
}
size_t cpu_get_cache_phy_partition_info(const struct cpu_cache_info *info)
{
if (!info)
return 0;
return info->physical_partitions;
}
size_t cpu_get_cache_line_size(const struct cpu_cache_info *info)
{
if (!info)
return 0;
return info->line_size;
}
size_t cpu_get_cache_sets(const struct cpu_cache_info *info)
{
if (!info)
return 0;
return info->num_sets;
}
bool cpu_is_cache_full_assoc(const struct cpu_cache_info *info)
{
if (!info)
return false;
return info->fully_associative;
}
size_t cpu_get_max_cache_share(const struct cpu_cache_info *info)
{
if (!info)
return 0;
return info->num_cores_shared;
}
size_t get_cache_size(const struct cpu_cache_info *info)
{
if (!info)
return 0;
return info->num_ways * info->physical_partitions * info->line_size * info->num_sets;
}
bool fill_cpu_cache_info(uint8_t level, struct cpu_cache_info *info)
{
if (!info)
return false;
uint32_t leaf = cpu_get_cache_info_leaf();
if (!leaf)
return false;
struct cpuid_result cache_info_res = cpuid_ext(leaf, level);
info->type = CPUID_CACHE_TYPE(cache_info_res);
info->level = CPUID_CACHE_LEVEL(cache_info_res);
info->num_ways = CPUID_CACHE_WAYS_OF_ASSOC(cache_info_res) + 1;
info->num_sets = CPUID_CACHE_NO_OF_SETS(cache_info_res) + 1;
info->line_size = CPUID_CACHE_COHER_LINE(cache_info_res) + 1;
info->physical_partitions = CPUID_CACHE_PHYS_LINE(cache_info_res) + 1;
info->num_cores_shared = CPUID_CACHE_SHARING_CACHE(cache_info_res) + 1;
info->fully_associative = CPUID_CACHE_FULL_ASSOC(cache_info_res);
info->size = get_cache_size(info);
return true;
}
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