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/* SPDX-License-Identifier: GPL-2.0-only */
#include <arch/smc.h>
#include <console/console.h>
#include <types.h>
/* Assumes at least a PSCI implementation is present */
uint8_t smccc_supports_arch_soc_id(void)
{
static uint8_t supported = 0xff;
uint64_t smc_ret;
if (supported != 0xff)
return supported;
// PSCI_FEATURES mandatory from PSCI 1.0
smc_ret = smc_call0(PSCI_VERSION);
if (smc_ret < 0x10000)
goto fail;
smc_ret = smc_call1(PSCI_FEATURES, SMCCC_VERSION);
if (smc_ret == PSCI_NOT_SUPPORTED)
goto fail;
// SMCCC_ARCH_FEATURES supported from SMCCC 1.1
smc_ret = smc_call0(SMCCC_VERSION);
if (smc_ret < 0x10001)
goto fail;
smc_ret = smc_call1(SMCCC_ARCH_FEATURES, SMCCC_ARCH_SOC_ID);
if (smc_ret != SMC_SUCCESS)
goto fail;
supported = 1;
return supported;
fail:
supported = 0;
return supported;
}
enum cb_err smccc_arch_soc_id(uint32_t *jep106code, uint32_t *soc_revision)
{
uint64_t smc_ret;
if (jep106code == NULL || soc_revision == NULL)
return CB_ERR_ARG;
smc_ret = smc_call1(SMCCC_ARCH_SOC_ID, SMCCC_GET_SOC_VERSION);
if (smc_ret != SMC_INVALID_PARAMETER)
*jep106code = smc_ret;
else
*jep106code = -1;
smc_ret = smc_call1(SMCCC_ARCH_SOC_ID, SMCCC_GET_SOC_REVISION);
if (smc_ret != SMC_INVALID_PARAMETER)
*soc_revision = smc_ret;
else
*soc_revision = -1;
if (*jep106code == -1 || *soc_revision == -1) {
printk(BIOS_ERR, "SMCCC_ARCH_SOC_ID failed!\n");
return CB_ERR;
} else
return CB_SUCCESS;
}
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