AM6442: Change ATF console to main_uart3 from main_uart0

Sorry,

I am missed to copy the log.

log:

U-Boot SPL 2024.04-dirty (Feb 04 2025 - 16:30:17 +0900)
Resetting on cold boot to workaround ErrataID:i2331
Please resend tiboot3.bin in case of UART/DFU boot
resetting ...

U-Boot SPL 2024.04-dirty (Feb 04 2025 - 16:30:17 +0900)
SYSFW ABI: 4.0 (firmware rev 0x000a '10.1.8--v10.01.08 (Fiery Fox)')
SPL initial stack usage: 13392 bytes
Trying to boot from MMC2
Authentication passed
Authentication passed
Loading Environment from nowhere... OK
Authentication passed
Authentication passed
Starting ATF on ARM64 core...

NOTICE: BL31: v2.11.0(release):v2.11.0-906-g58b25570c-dirty
NOTICE: BL31: Built : 07:26:44, Feb 4 2025
Unhandled Exception in EL3.
x30 = 0x00000000701c6e38
x0 = 0x0000000000000001
x1 = 0x00000000701cc098
x2 = 0x00000000701cc000
x3 = 0x00000000701cc0d8
x4 = 0x0000000032401000
x5 = 0x0000000000000040
x6 = 0x00000000701d801e
x7 = 0x0000000000000000
x8 = 0x00000000701c0000
x9 = 0x00000000701d0650
x10 = 0x0000000032e00000
x11 = 0x0000000000000000
x12 = 0x00000000701ca1f0
x13 = 0x00000000701ca1f0
x14 = 0x0000000000000004
x15 = 0x0000000041033020
x16 = 0xbce190546ce50a74
x17 = 0x485d00c0e183713e
x18 = 0x5b2cfa91a447272f
x19 = 0x00000000701cd638
x20 = 0x00000000701cd5d0
x21 = 0xb4a0cd3122f44dcf
x22 = 0x05dbc817569db2ed
x23 = 0xa90935fa00128ac0
x24 = 0x00000000701d8000
x25 = 0x25fc504f886116b9
x26 = 0x70d41667e8126b82
x27 = 0x2b7a1511a44465a2
x28 = 0x0639f8b6cb04207b
x29 = 0x00000000701cd540
scr_el3 = 0x0000000000000238
sctlr_el3 = 0x0000000030cd183f
cptr_el3 = 0x0000000080000400
tcr_el3 = 0x0000000080803520
daif = 0x00000000000003c0
mair_el3 = 0x00000000004404ff
spsr_el3 = 0x00000000600002cc
elr_el3 = 0x00000000701c3bd8
ttbr0_el3 = 0x00000000701d30c0
esr_el3 = 0x0000000096000010
far_el3 = 0x0000000032401000
spsr_el1 = 0x000000000e002b49
elr_el1 = 0x3ee6086c4480c911
spsr_abt = 0x000000009213b30a
spsr_und = 0x000000000a002f4e
spsr_irq = 0x000000003011875d
spsr_fiq = 0x00000000861a7383
sctlr_el1 = 0x0000000000c50838
actlr_el1 = 0x0000000000000000
cpacr_el1 = 0x0000000000000000
csselr_el1 = 0x0000000000000000
sp_el1 = 0x1caa3e028ee6829f
esr_el1 = 0x00000000db8e985d
ttbr0_el1 = 0x23c44931046a22f8
ttbr1_el1 = 0x8443808090a95218
mair_el1 = 0x44e048e000098aa4
amair_el1 = 0x0000000000000000
tcr_el1 = 0x0000000000000000
tpidr_el1 = 0x0953512423400020
tpidr_el0 = 0x84c1200084148004
tpidrro_el0 = 0x0428188100690900
par_el1 = 0x0500008080021402
mpidr_el1 = 0x0000000080000000
afsr0_el1 = 0x0000000000000000
afsr1_el1 = 0x0000000000000000
contextidr_el1 = 0x0000000000000000
vbar_el1 = 0x0000000000000000
cntp_ctl_el0 = 0x0000000000000000
cntp_cval_el0 = 0xf5900300008419d5
cntv_ctl_el0 = 0x0000000000000002
cntv_cval_el0 = 0xfaddfbebc60d198f
cntkctl_el1 = 0x0000000000000000
sp_el0 = 0x00000000701cd540
isr_el1 = 0x0000000000000000
dacr32_el2 = 0x000000000000604c
ifsr32_el2 = 0x0000000000000014
cpuectlr_el1 = 0x0000000000000040
cpumerrsr_el1 = 0x0000000009080300
l2merrsr_el1 = 0x0000000012305268
cpuactlr_el1 = 0x00001000090ca000

Hi Shigemi,

I will look try to reproduce the issue tomorrow and look into it.

Hi Shigemi-san,

I am able to build ATF with console configured to UART3 but don't see the unhandled exception error.

Shigemi Mikayama said:

NOTICE: BL31: v2.11.0(release):v2.11.0-906-g58b25570c-dirty

I noticed your BL31 version signature has "g58b25570c-dirty", which is shorter than mine:

NOTICE:  BL31: v2.11.0(release):v2.11.0-906-g58b25570c9ef-dirty

I am not sure what causes the difference. Do you use the same toolchain provided in the SDK10.1 package?

Hi Bin,

Yes, I confirmed the toolchain settings.

The above part of the message is created by shell in line 175 in Makefile.

175: BUILD_STRING := $(shell git describe --always --dirty --tags 2> /dev/null)
177: VERSION_STRING := v${VERSION}(${BUILD_TYPE}):${BUILD_STRING}

In my SDK environment, git describe command returns 'v2.11.0-906-g58b25570c-dirty' like following.

$ git describe --always --dirty --tags
v2.11.0-906-g58b25570c-dirty

So, repository's tag is different from yours. Could give me the correct tag name of the repository? 

Hi Shigemi,

The git tag is the same, but yours is just shorter by 3 letters. Maybe it is due to your git configurations, but it should not be related to the unhandled exception issue you have. But I am not sure what would cause it, I am unable to reproduce it on my side.

Can you please describe the exact details how did you rebuild ATF and U-Boot? The ensure console log would be helpful.

Hi Bin,

First, I editted plat_common.mk, following is the git diff image.

diff --git a/plat/ti/k3/common/plat_common.mk b/plat/ti/k3/common/plat_common.mk
index 8db732cb6..7cde62bf7 100644
--- a/plat/ti/k3/common/plat_common.mk
+++ b/plat/ti/k3/common/plat_common.mk
@@ -39,7 +39,7 @@ ENABLE_PIE            :=      1
 TI_16550_MDR_QUIRK     :=      1
 $(eval $(call add_define,TI_16550_MDR_QUIRK))
 
-K3_USART               :=      0
+K3_USART               :=      3
 $(eval $(call add_define,K3_USART))

2nd, set environment variable with the following file. (/home/mikayama/sdk101 is the sdk root.)

export SDK_INSTALL_DIR=/home/mikayama/sdk101
export CROSS_COMPILE_64="${SDK_INSTALL_DIR}/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-oe-linux/aarch64-oe-linux-"
export SYSROOT_64="${SDK_INSTALL_DIR}/linux-devkit/sysroots/aarch64-oe-linux"
export CC_64="${CROSS_COMPILE_64}gcc --sysroot=${SYSROOT_64}"
export CROSS_COMPILE_32="${SDK_INSTALL_DIR}/k3r5-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-oe-eabi/arm-oe-eabi-"

Then, make trusted firmware as follows.

mikayama@nuc03:08:31:25$ make ARCH=aarch64 CROSS_COMPILE="$CROSS_COMPILE_64" PLAT=k3 TARGET_BOARD=generic SPD=opteed 
Including services/spd/opteed/opteed.mk
Building k3
  MD      /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/libc
  CC      lib/libc/abort.c
  CC      lib/libc/assert.c
  CC      lib/libc/exit.c
  CC      lib/libc/memchr.c
  CC      lib/libc/memcmp.c
  CC      lib/libc/memcpy.c
  CC      lib/libc/memcpy_s.c
  CC      lib/libc/memmove.c
  CC      lib/libc/memrchr.c
  CC      lib/libc/printf.c
  CC      lib/libc/putchar.c
  CC      lib/libc/puts.c
  CC      lib/libc/snprintf.c
  CC      lib/libc/strchr.c
  CC      lib/libc/strcmp.c
  CC      lib/libc/strlcat.c
  CC      lib/libc/strlcpy.c
  CC      lib/libc/strlen.c
  CC      lib/libc/strncmp.c
  CC      lib/libc/strnlen.c
  CC      lib/libc/strrchr.c
  CC      lib/libc/strtok.c
  CC      lib/libc/strtoul.c
  CC      lib/libc/strtoll.c
  CC      lib/libc/strtoull.c
  CC      lib/libc/strtol.c
  CC      lib/libc/memset.c
  AS      lib/libc/aarch64/setjmp.S
  MD      /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/lib
  AR      /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/lib/libc.a
  MD      /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/bl31
  CC      bl31/bl31_context_mgmt.c
  CC      bl31/bl31_main.c
  CC      bl31/bl31_traps.c
  CC      bl31/interrupt_mgmt.c
  CC      common/bl_common.c
  CC      common/runtime_svc.c
  CC      common/tf_log.c
  CC      drivers/arm/gic/v3/arm_gicv3_common.c
  CC      drivers/arm/gic/v3/gic-x00.c
  CC      drivers/arm/gic/v3/gicdv3_helpers.c
  CC      drivers/arm/gic/v3/gicrv3_helpers.c
  CC      drivers/arm/gic/v3/gicv3_helpers.c
  CC      drivers/arm/gic/v3/gicv3_main.c
  CC      drivers/console/multi_console.c
  CC      lib/compiler-rt/builtins/popcountdi2.c
  CC      lib/compiler-rt/builtins/popcountsi2.c
  CC      lib/cpus/errata_common.c
  CC      lib/cpus/errata_report.c
  CC      lib/el3_runtime/aarch64/context_mgmt.c
  CC      lib/el3_runtime/cpu_data_array.c
  CC      lib/el3_runtime/simd_ctx.c
  CC      lib/extensions/mpam/mpam.c
  CC      lib/extensions/pmuv3/aarch64/pmuv3.c
  CC      lib/extensions/spe/spe.c
  CC      lib/extensions/sve/sve.c
  CC      lib/locks/bakery/bakery_lock_coherent.c
  CC      lib/psci/psci_common.c
  CC      lib/psci/psci_main.c
  CC      lib/psci/psci_mem_protect.c
  CC      lib/psci/psci_off.c
  CC      lib/psci/psci_on.c
  CC      lib/psci/psci_setup.c
  CC      lib/psci/psci_suspend.c
  CC      lib/psci/psci_system_off.c
  CC      lib/xlat_tables_v2/aarch64/xlat_tables_arch.c
  CC      lib/xlat_tables_v2/xlat_tables_context.c
  CC      lib/xlat_tables_v2/xlat_tables_core.c
  CC      lib/xlat_tables_v2/xlat_tables_utils.c
  CC      plat/common/aarch64/plat_common.c
  CC      plat/common/plat_bl_common.c
  CC      plat/common/plat_gicv3.c
  CC      plat/common/plat_log_common.c
  CC      plat/common/plat_psci_common.c
  CC      plat/ti/k3/common/drivers/sec_proxy/sec_proxy.c
  CC      plat/ti/k3/common/drivers/ti_sci/ti_sci.c
  CC      plat/ti/k3/common/k3_bl31_setup.c
  CC      plat/ti/k3/common/k3_console.c
  CC      plat/ti/k3/common/k3_gicv3.c
  CC      plat/ti/k3/common/k3_psci.c
  CC      plat/ti/k3/common/k3_topology.c
  CC      services/arm_arch_svc/arm_arch_svc_setup.c
  CC      services/spd/opteed/opteed_common.c
  CC      services/spd/opteed/opteed_main.c
  CC      services/spd/opteed/opteed_pm.c
  CC      services/std_svc/std_svc_setup.c
  AS      bl31/aarch64/bl31_entrypoint.S
  AS      bl31/aarch64/crash_reporting.S
  AS      bl31/aarch64/runtime_exceptions.S
  AS      common/aarch64/debug.S
  AS      drivers/ti/uart/aarch64/16550_console.S
  AS      lib/aarch64/cache_helpers.S
  AS      lib/aarch64/misc_helpers.S
  AS      lib/cpus/aarch64/cortex_a53.S
  AS      lib/cpus/aarch64/cortex_a72.S
  AS      lib/cpus/aarch64/cpu_helpers.S
  AS      lib/cpus/aarch64/dsu_helpers.S
  AS      lib/cpus/aarch64/wa_cve_2017_5715_bpiall.S
  AS      lib/cpus/aarch64/wa_cve_2017_5715_mmu.S
  AS      lib/el3_runtime/aarch64/context.S
  AS      lib/el3_runtime/aarch64/cpu_data.S
  AS      lib/locks/exclusive/aarch64/spinlock.S
  AS      lib/psci/aarch64/psci_helpers.S
  AS      lib/xlat_tables_v2/aarch64/enable_mmu.S
  AS      plat/common/aarch64/platform_helpers.S
  AS      plat/common/aarch64/platform_mp_stack.S
  AS      plat/ti/k3/common/k3_helpers.S
  AS      services/spd/opteed/opteed_helpers.S
  MD      /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/bl31/bl31
  PP      bl31/bl31.ld.S
  LD      /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/bl31/bl31.elf
  BIN     /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/bl31.bin

Built /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/bl31.bin successfully

  OD      /home/mikayama/sdk101/board-support/trusted-firmware-a-2.11+git/build/k3/generic/release/bl31/bl31.dump

Then, copy bl31.bin onto prebuilt-image/am64xx-evm/.

mikayama@nuc03:08:45:07$ ls -l build/k3/generic/release/bl31.bin ../prebuilt-images/am64xx-evm/bl31.bin
-rw-rw-r-- 1 mikayama mikayama 52856 Feb 13 08:31 build/k3/generic/release/bl31.bin
-rw-r--r-- 1 mikayama mikayama 52856 Feb 13 08:45 ../prebuilt-images/am64xx-evm/bl31.bin

I also edited the u-boot device tree source as follows and return to sdk top directory and make u-boot (with 'make u-boot' command).

diff --git a/arch/arm/dts/k3-am642-evm.dts b/arch/arm/dts/k3-am642-evm.dts
index 50e80436b06..7699e7c1bf9 100644
--- a/arch/arm/dts/k3-am642-evm.dts
+++ b/arch/arm/dts/k3-am642-evm.dts
@@ -18,7 +18,7 @@
        model = "Texas Instruments AM642 EVM";
 
        chosen {
-               stdout-path = &main_uart0;
+               stdout-path = &main_uart3;
        };
 
        aliases {
@@ -320,8 +320,8 @@
 
        main_uart1_pins_default: main-uart1-default-pins {
                pinctrl-single,pins = <
-                       AM64X_IOPAD(0x0248, PIN_INPUT, 0)               /* (D16) UART1_CTSn */
-                       AM64X_IOPAD(0x024c, PIN_OUTPUT, 0)              /* (E16) UART1_RTSn */
+                       // AM64X_IOPAD(0x0248, PIN_INPUT, 0)            /* (D16) UART1_CTSn */
+                       // AM64X_IOPAD(0x024c, PIN_OUTPUT, 0)           /* (E16) UART1_RTSn */
                        AM64X_IOPAD(0x0240, PIN_INPUT, 0)               /* (E15) UART1_RXD */
                        AM64X_IOPAD(0x0244, PIN_OUTPUT, 0)              /* (E14) UART1_TXD */
                >;
@@ -337,6 +337,14 @@
                >;
        };
 
+       main_uart3_pins_default: main-uart3-default-pins {
+               bootph-all;
+               pinctrl-single,pins = <
+                       AM64X_IOPAD(0x0248, PIN_INPUT, 4)               /* (D16) UART3_RXD */
+                       AM64X_IOPAD(0x024c, PIN_OUTPUT, 4)              /* (E16) UART3_TXD */
+               >;
+       };
+
        main_spi0_pins_default: main-spi0-default-pins {
                pinctrl-single,pins = <
                        AM64X_IOPAD(0x0210, PIN_INPUT, 0) /* (D13) SPI0_CLK */
@@ -496,6 +504,14 @@
        current-speed = <115200>;
 };
 
+&main_uart3 {
+       bootph-all;
+       status = "okay";
+       pinctrl-names = "default";
+       pinctrl-0 = <&main_uart3_pins_default>;
+       current-speed = <115200>;
+};
+
 /* main_uart1 is reserved for firmware usage */
 &main_uart1 {
        status = "reserved";
diff --git a/arch/arm/dts/k3-am642-r5-evm.dts b/arch/arm/dts/k3-am642-r5-evm.dts
index 548cfce8f99..8950a534df4 100644
--- a/arch/arm/dts/k3-am642-r5-evm.dts
+++ b/arch/arm/dts/k3-am642-r5-evm.dts
@@ -143,7 +143,12 @@
  * Delete clock/power-domain properties to avoid
  * UART init failure
  */
-&main_uart0 {
+// &main_uart0 {
+//     /delete-property/ power-domains;
+//     /delete-property/ clocks;
+//     /delete-property/ clock-names;
+// };
+&main_uart3 {
        /delete-property/ power-domains;
        /delete-property/ clocks;
        /delete-property/ clock-names;

Hi Bin,

I build ATF with "TARGET_BOARD=lite." The result is that ATF was stuck just after ATF version message.

U-Boot SPL 2024.04-dirty (Feb 14 2025 - 13:13:21 +0900)                                                             
Resetting on cold boot to workaround ErrataID:i2331                                                                 
Please resend tiboot3.bin in case of UART/DFU boot                                                                  
resetting ...                                                                                                       
                                                                                                                    
U-Boot SPL 2024.04-dirty (Feb 14 2025 - 13:13:21 +0900)                                                             
SYSFW ABI: 4.0 (firmware rev 0x000a '10.1.8--v10.01.08 (Fiery Fox)')                                                
SPL initial stack usage: 13392 bytes                                                                                
Trying to boot from MMC2                                                                                            
Authentication passed                                                                                               
Authentication passed                                                                                               
Loading Environment from nowhere... OK                                                                              
Authentication passed                                                                                               
Authentication passed                                                                                               
Starting ATF on ARM64 core...                                                                                       
                                                                                                                    
NOTICE:  BL31: v2.11.0(release):v2.11.0-906-g58b25570c-dirty                                                        
NOTICE:  BL31: Built : 04:12:06, Feb 14 2025

What should I do next?