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authorAhmad Fatoum <a.fatoum@pengutronix.de>2019-11-06 11:21:44 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2019-11-07 08:08:24 +0100
commit95bf11436890136534868894f96181a79cbf2662 (patch)
treee3058865ab46069ae5eec7399d97f5d150e3ed5d /arch/arm
parentcfb5d8dfe76357a4a03c2926a84f3ae5480f6a42 (diff)
downloadbarebox-95bf11436890136534868894f96181a79cbf2662.tar.gz
barebox-95bf11436890136534868894f96181a79cbf2662.tar.xz
ARM: psci: translate PSCI error codes in smc command
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@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/cpu/psci.c38
1 files changed, 37 insertions, 1 deletions
diff --git a/arch/arm/cpu/psci.c b/arch/arm/cpu/psci.c
index a976ddbb5c..b02e83986a 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;
}
}