How to print log in BL31?

ssong — Wed, 22 Jun 2022 11:35:01 GMT

Hello.

I´m working with the S32R45 chip using YOCTO.

and i'm modifying ATF(arm trusted firmware).

BL31 of ATF not print log anything, but BL2 does.

I can see BL2 log, followed u-boot log.

BL2 and BL31 uses same print function(used "ERROR()" macro function), and i'm not modify relative configurtation.

BSP version is 32.

How to I see BL31 log?

Re: How to print log in BL31?

petervlna — Fri, 24 Jun 2022 06:58:41 GMT

Hello,

This is just a Linux question. I have asked for help here our application team.

Once they have a time they will reply here.

Best regards,

Peter

Re: How to print log in BL31?

zhongchao — Mon, 10 Jun 2024 04:24:30 GMT

From 1ceadfc50d0c19d2ad5c8bf8917129e9dc115b9f Mon Sep 17 00:00:00 2001

From: "zhongchao.wang" <zhongchao.wang@nio.com>

Date: Mon, 10 Jun 2024 10:11:24 +0800

Subject: [PATCH 17/17] add some logs

---

Makefile | 2 +-

lib/psci/psci_main.c | 1 +

plat/nxp/s32/s32_bl31.c | 4 ++--

plat/nxp/s32/s32_common.mk | 2 +-

4 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile

index e7194a73f..094d2e5a7 100644

--- a/Makefile

+++ b/Makefile

@@ -305,7 +305,7 @@ ifneq (${DEBUG}, 0)

else

BUILD_TYPE := release

# Use LOG_LEVEL_NOTICE by default for release builds

- LOG_LEVEL := 20

+ LOG_LEVEL := 40

endif

# Default build string (git branch and commit)

diff --git a/lib/psci/psci_main.c b/lib/psci/psci_main.c

index 52a8b8a18..b98bbbc8a 100644

--- a/lib/psci/psci_main.c

+++ b/lib/psci/psci_main.c

@@ -490,6 +490,7 @@ u_register_t psci_smc_handler(uint32_t smc_fid,

break;

case PSCI_CPU_ON_AARCH64:

+ WARN("BL31: PSCI_CPU_ON_AARCH64 cpu:0x%x\n", (unsigned int)x1);

ret = (u_register_t)psci_cpu_on(x1, x2, x3);

break;

diff --git a/plat/nxp/s32/s32_bl31.c b/plat/nxp/s32/s32_bl31.c

index b1d89fe6f..36ba8dcad 100644

--- a/plat/nxp/s32/s32_bl31.c

+++ b/plat/nxp/s32/s32_bl31.c

@@ -475,9 +475,9 @@ void bl31_plat_arch_setup(void)

s32_smp_fixup();

s32_el3_mmu_fixup();

-#if (S32_USE_LINFLEX_IN_BL31 == 1)

+// #if (S32_USE_LINFLEX_IN_BL31 == 1)

console_s32_register();

-#endif

+// #endif

#if defined(HSE_SECBOOT) && defined(SPD_opteed)

s32_add_hse_irqs();

diff --git a/plat/nxp/s32/s32_common.mk b/plat/nxp/s32/s32_common.mk

index 4937b6a37..22c730975 100644

--- a/plat/nxp/s32/s32_common.mk

+++ b/plat/nxp/s32/s32_common.mk

@@ -174,7 +174,7 @@ LOG_LEVEL ?= 50

# there is no hardware lock to prevent concurrent access to the device. For now,

# opt to suppress output (except for crash reporting). For debugging and other

# similarly safe contexts, output can be turned back on using this switch.

-S32_USE_LINFLEX_IN_BL31 ?= 0

+S32_USE_LINFLEX_IN_BL31 ?= 1

$(eval $(call add_define_val,S32_USE_LINFLEX_IN_BL31,$(S32_USE_LINFLEX_IN_BL31)))

# Whether we're going to run a hypervisor (EL2) or jump straight into the

2.25.1

========================================================================

the log will print when kernel up cpu

WARNING: BL31: PSCI_CPU_ON_AARCH64 cpu:0x1
NOTICE: S32 TF-A: s32_pwr_domain_on: booting up core 1 (4)

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