For more usability, translate CPU_ON error codes into the error descriptions found in the PSCI Platform Design Document[1]. [1]: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> --- arch/arm/cpu/psci.c | 38 +++++++++++++++++++++++++++++++++++++- 1 file changed, 37 insertions(+), 1 deletion(-) diff --git a/arch/arm/cpu/psci.c b/arch/arm/cpu/psci.c index a976ddbb5c65..b02e83986af8 100644 --- a/arch/arm/cpu/psci.c +++ b/arch/arm/cpu/psci.c @@ -248,8 +248,41 @@ void second_entry(void) while (1); } +static const char *psci_xlate_str(long err) +{ + static char errno_string[sizeof "error 0x123456789ABCDEF0"]; + + switch(err) + { + case ARM_PSCI_RET_SUCCESS: + return "Success"; + case ARM_PSCI_RET_NOT_SUPPORTED: + return "Operation not supported"; + case ARM_PSCI_RET_INVAL: + return "Invalid argument"; + case ARM_PSCI_RET_DENIED: + return "Operation not permitted"; + case ARM_PSCI_RET_ALREADY_ON: + return "CPU already on"; + case ARM_PSCI_RET_ON_PENDING: + return "CPU_ON in progress"; + case ARM_PSCI_RET_INTERNAL_FAILURE: + return "Internal failure"; + case ARM_PSCI_RET_NOT_PRESENT: + return "Trusted OS not present on core"; + case ARM_PSCI_RET_DISABLED: + return "CPU is disabled"; + case ARM_PSCI_RET_INVALID_ADDRESS: + return "Bad address"; + } + + sprintf(errno_string, "error 0x%lx", err); + return errno_string; +} + static int do_smc(int argc, char *argv[]) { + long ret; int opt; struct arm_smccc_res res = { .a0 = 0xdeadbee0, @@ -271,7 +304,10 @@ static int do_smc(int argc, char *argv[]) case 'c': arm_smccc_smc(ARM_PSCI_0_2_FN_CPU_ON, 1, (unsigned long)second_entry, 0, 0, 0, 0, 0, &res); - break; + ret = (long)res.a0; + printf("CPU_ON returns with: %s\n", psci_xlate_str(ret)); + if (ret) + return COMMAND_ERROR; } } -- 2.24.0.rc1 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
