[Buildroot] Trouble with u-boot on a ZynqMP board

[Luca Ceresoli]

Hi Alvaro,

On 24/06/21 23:51, Luca Ceresoli wrote:
[...]
>>> I haven't been working on zynqmp recently but back at the times
>>> (2018~2019) one needed to have the various booting components "in sync",
>>> expecially pmufw, U-Boot and SPL or FSBL. I don't remember whether ATF
>>> was critical too in that respect. By "in sync" I mean the major version
>>> number (the year) should be the same.
>>>
>>> Here you are using a 2018 pmufw and 2021 U-Boot so you muight want to
>>> build a more recent pmufw and see if you get any improvements.
>>
>> Great, that's a nice idea, thank you!
> 
> Try that, which seems to be required:
> https://forums.xilinx.com/t5/Embedded-Linux/problem-on-u-boot-quot-Synchronous-Abort-quot-handler-esr/m-p/1060937/highlight/true#M39206

Did you make any progress?

I was able to build and test more recent versions of pmufw (2019.2 amd
2020.1) and pushed them to [0]. They are tested and working. Not sure
it's useful, but that's what I can provide at the moment.

I generated them with an unmodified zynqmp-pmufw-builder. You can do the
same to generate similar images but with debug messages enabled. Here's
a dirty patch to apply to the 'embeddedsw' submodule to enable _lots_ of
messages:

----------------------------8<----------------------------
diff --git a/lib/sw_apps/zynqmp_pmufw/src/pm_common.h
b/lib/sw_apps/zynqmp_pmufw/src/pm_common.h
index 1bed98e76630..3a06a15b62dc 100644
--- a/lib/sw_apps/zynqmp_pmufw/src/pm_common.h
+++ b/lib/sw_apps/zynqmp_pmufw/src/pm_common.h
@@ -52,6 +52,7 @@ typedef struct PmNode PmNode;
 #define PM_ERROR	2U
 #define PM_WARNING	3U
 #define PM_INFO		4U
+#define PM_LOG_LEVEL 4U /////////////////////////////////

 #if defined(PM_LOG_LEVEL) && (PM_LOG_LEVEL >= PM_INFO)
 	#define PmInfo(...)	pm_printf(__VA_ARGS__)
diff --git a/lib/sw_apps/zynqmp_pmufw/src/xpfw_config.h
b/lib/sw_apps/zynqmp_pmufw/src/xpfw_config.h
index 4816a2dfd06b..2420a7a47493 100644
--- a/lib/sw_apps/zynqmp_pmufw/src/xpfw_config.h
+++ b/lib/sw_apps/zynqmp_pmufw/src/xpfw_config.h
@@ -17,8 +17,8 @@ extern "C" {

 /* PMUFW print levels */
 #define XPFW_PRINT_VAL (1U)
-#define XPFW_DEBUG_ERROR_VAL (0U)
-#define XPFW_DEBUG_DETAILED_VAL (0U)
+#define XPFW_DEBUG_ERROR_VAL (1U)
+#define XPFW_DEBUG_DETAILED_VAL (1U)

 /**
  * PMUFW Debug options
----------------------------8<----------------------------

[0] https://github.com/lucaceresoli/zynqmp-pmufw-binaries/

-- 
Luca