Ejemplo n.º 1
0
Archivo: psci.c Proyecto: 020gzh/linux
/*
 * Detect the presence of a resident Trusted OS which may cause CPU_OFF to
 * return DENIED (which would be fatal).
 */
static void __init psci_init_migrate(void)
{
	unsigned long cpuid;
	int type, cpu = -1;

	type = psci_ops.migrate_info_type();

	if (type == PSCI_0_2_TOS_MP) {
		pr_info("Trusted OS migration not required\n");
		return;
	}

	if (type == PSCI_RET_NOT_SUPPORTED) {
		pr_info("MIGRATE_INFO_TYPE not supported.\n");
		return;
	}

	if (type != PSCI_0_2_TOS_UP_MIGRATE &&
	    type != PSCI_0_2_TOS_UP_NO_MIGRATE) {
		pr_err("MIGRATE_INFO_TYPE returned unknown type (%d)\n", type);
		return;
	}

	cpuid = psci_migrate_info_up_cpu();
	if (cpuid & ~MPIDR_HWID_BITMASK) {
		pr_warn("MIGRATE_INFO_UP_CPU reported invalid physical ID (0x%lx)\n",
			cpuid);
		return;
	}

	cpu = get_logical_index(cpuid);
	resident_cpu = cpu >= 0 ? cpu : -1;

	pr_info("Trusted OS resident on physical CPU 0x%lx\n", cpuid);
}
Ejemplo n.º 2
0
/*******************************************************************************
 * PSCI top level handler for servicing SMCs.
 ******************************************************************************/
uint64_t psci_smc_handler(uint32_t smc_fid,
			  uint64_t x1,
			  uint64_t x2,
			  uint64_t x3,
			  uint64_t x4,
			  void *cookie,
			  void *handle,
			  uint64_t flags)
{
	uint64_t rc;

	switch (smc_fid) {
	case PSCI_VERSION:
		rc = psci_version();
		break;

	case PSCI_CPU_OFF:
		rc = __psci_cpu_off();
		break;

	case PSCI_CPU_SUSPEND_AARCH64:
	case PSCI_CPU_SUSPEND_AARCH32:
		rc = __psci_cpu_suspend(x1, x2, x3);
		break;

	case PSCI_CPU_ON_AARCH64:
	case PSCI_CPU_ON_AARCH32:
		rc = psci_cpu_on(x1, x2, x3);
		break;

	case PSCI_AFFINITY_INFO_AARCH32:
	case PSCI_AFFINITY_INFO_AARCH64:
		rc = psci_affinity_info(x1, x2);
		break;

	case PSCI_MIG_AARCH32:
	case PSCI_MIG_AARCH64:
		rc = psci_migrate(x1);
		break;

	case PSCI_MIG_INFO_TYPE:
		rc = psci_migrate_info_type();
		break;

	case PSCI_MIG_INFO_UP_CPU_AARCH32:
	case PSCI_MIG_INFO_UP_CPU_AARCH64:
		rc = psci_migrate_info_up_cpu();
		break;

	default:
		rc = SMC_UNK;
		WARN("Unimplemented PSCI Call: 0x%x \n", smc_fid);
	}

	SMC_RET1(handle, rc);
}