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/* SPDX-License-Identifier: GPL-2.0-only */
#include <arch/cache.h>
#include <arch/lib_helpers.h>
#include <arch/smc.h>
#include <smbios.h>
#include <stdio.h>
static void smbios_processor_id(u32 *processor_id)
{
uint32_t jep106code, soc_revision;
uint64_t midr_el1;
if (smccc_supports_arch_soc_id()) {
smccc_arch_soc_id(&jep106code, &soc_revision);
processor_id[0] = jep106code;
processor_id[1] = soc_revision;
} else {
midr_el1 = raw_read_midr_el1();
processor_id[0] = midr_el1;
processor_id[1] = 0;
}
}
static int smbios_processor_manufacturer(u8 *start)
{
char midr_el1_implementer;
char buf[32];
// [31:24] - Implementer code
midr_el1_implementer = (raw_read_midr_el1() & 0xff000000) >> 24;
snprintf(buf, sizeof(buf), "CPU implementer %x", midr_el1_implementer);
return smbios_add_string(start, buf);
}
static int smbios_processor_name(u8 *start)
{
uint16_t midr_el1_partnumber;
char buf[32];
// [15:4] - PartNum
midr_el1_partnumber = (raw_read_midr_el1() & 0xfff0) >> 4;
snprintf(buf, sizeof(buf), "ARMv8 Processor rev %d", midr_el1_partnumber);
return smbios_add_string(start, buf);
}
#define MAX_CPUS_ENABLED(cpus) (cpus > 0xff ? 0xff : cpus)
/* NOTE: Not handling big.LITTLE clusters. Consider using MP services (not yet) or the DSU. */
int smbios_write_type4(unsigned long *current, int handle)
{
static unsigned int cnt = 0;
char buf[8];
uint16_t characteristics = 0;
unsigned int cpu_voltage;
struct smbios_type4 *t = smbios_carve_table(*current, SMBIOS_PROCESSOR_INFORMATION,
sizeof(*t), handle);
snprintf(buf, sizeof(buf), "CPU%d", cnt++);
t->socket_designation = smbios_add_string(t->eos, buf);
smbios_processor_id(t->processor_id);
t->processor_manufacturer = smbios_processor_manufacturer(t->eos);
t->processor_version = smbios_processor_name(t->eos);
t->processor_family = SMBIOS_PROCESSOR_FAMILY_FROM_FAMILY2;
t->processor_family2 = SMBIOS_PROCESSOR_FAMILY2_ARMV8;
t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
smbios_cpu_get_core_counts(&t->core_count2, &t->thread_count2);
t->core_count = MAX_CPUS_ENABLED(t->core_count2);
t->thread_count = MAX_CPUS_ENABLED(t->thread_count2);
/* Assume we always enable all cores */
t->core_enabled = t->core_count;
t->core_enabled2 = t->core_count2;
t->l1_cache_handle = 0xffff;
t->l2_cache_handle = 0xffff;
t->l3_cache_handle = 0xffff;
t->serial_number = smbios_add_string(t->eos, smbios_processor_serial_number());
t->status = SMBIOS_PROCESSOR_STATUS_CPU_ENABLED | SMBIOS_PROCESSOR_STATUS_POPULATED;
t->processor_upgrade = PROCESSOR_UPGRADE_UNKNOWN;
t->external_clock = smbios_processor_external_clock();
if (t->external_clock == 0)
t->external_clock = (raw_read_cntfrq_el0() / 1000 / 1000);
t->current_speed = smbios_cpu_get_current_speed_mhz();
/* This field identifies a capability for the system, not the processor itself. */
t->max_speed = smbios_cpu_get_max_speed_mhz();
/* TODO: Are "Enhanced Virtualization" (by EL2) and "Power/Performance Control" supported? */
characteristics |= PROCESSOR_64BIT_CAPABLE;
characteristics |= BIT(5); /* Execute Protection */
if (t->core_count > 1)
characteristics |= PROCESSOR_MULTI_CORE;
if (t->thread_count > 1)
characteristics |= BIT(4); /* BIT4: Hardware Thread */
if (smccc_supports_arch_soc_id())
characteristics |= BIT(9); /* Arm64 SoC ID */
t->processor_characteristics = characteristics | smbios_processor_characteristics();
cpu_voltage = smbios_cpu_get_voltage();
if (cpu_voltage > 0)
t->voltage = 0x80 | cpu_voltage;
const int len = smbios_full_table_len(&t->header, t->eos);
*current += len;
return len;
}
int smbios_write_type7_cache_parameters(unsigned long *current,
int *handle,
int *max_struct_size,
struct smbios_type4 *type4)
{
enum cache_level level = CACHE_L1;
int h;
int len = 0;
while (1) {
enum smbios_cache_type type;
struct cache_info info;
const u8 cache_type = cpu_get_cache_type(level);
/* No more caches in the system */
if (!cache_type)
break;
switch (cache_type) {
case CACHE_INSTRUCTION:
type = SMBIOS_CACHE_TYPE_INSTRUCTION;
cpu_get_cache_info(level, cache_type, &info);
break;
case CACHE_DATA:
type = SMBIOS_CACHE_TYPE_DATA;
cpu_get_cache_info(level, cache_type, &info);
break;
case CACHE_SEPARATE:
type = SMBIOS_CACHE_TYPE_DATA;
cpu_get_cache_info(level, CACHE_DATA, &info);
h = (*handle)++;
update_max(len, *max_struct_size, smbios_write_type7(current, h,
level, smbios_cache_sram_type(), smbios_cache_associativity(info.associativity),
type, info.size, info.size));
type = SMBIOS_CACHE_TYPE_INSTRUCTION;
cpu_get_cache_info(level, CACHE_INSTRUCTION, &info);
break;
case CACHE_UNIFIED:
type = SMBIOS_CACHE_TYPE_UNIFIED;
cpu_get_cache_info(level, cache_type, &info);
break;
default:
type = SMBIOS_CACHE_TYPE_UNKNOWN;
info.size = info.associativity = 0;
break;
}
h = (*handle)++;
update_max(len, *max_struct_size, smbios_write_type7(current, h,
level, smbios_cache_sram_type(), smbios_cache_associativity(info.associativity),
type, info.size, info.size));
if (type4) {
switch (level) {
case 1:
type4->l1_cache_handle = h;
break;
case 2:
type4->l2_cache_handle = h;
break;
case 3:
type4->l3_cache_handle = h;
break;
default:
break;
}
}
level++;
}
return len;
}
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