SK-AM62P-LP: How to change the size of eMMC boot0/boot1 size?

Hello,

Please use the eMMC UDA partition instead of modifying the boot partition sizes.

Hello team

I have 2 question about use UDA partition to boot the service.

1. How to change the setting to boot from UDA?

2. Did I need to change the of SBL stage1&2? How?

Hello,

Pu Jia said:

1. How to change the setting to boot from UDA?

The MCU+ SDK does not have the support for booting from UDA as of now.

How is your A53 image getting to 45MB in size? Even the Falcon one is about ~22MB only.

The image is QNX image, as I include the Screen WFD libs, the image increased to 45MB.....

We already have a requirement for supporting the booting from all eMMC partitions (Boot0/Boot1/UDA) in the MCU+ SDK. For now, the following patch should enable you to boot any image from a raw offset in the UDA partition

diff --git a/examples/drivers/boot/common/soc/am62px/sbl_emmc_linux_stage2.c b/examples/drivers/boot/common/soc/am62px/sbl_emmc_linux_stage2.c
index 115134010..914b28062 100644
--- a/examples/drivers/boot/common/soc/am62px/sbl_emmc_linux_stage2.c
+++ b/examples/drivers/boot/common/soc/am62px/sbl_emmc_linux_stage2.c
@@ -40,7 +40,7 @@
 #include <kernel/dpl/CacheP.h>
 #include "FreeRTOS.h"
 #include "task.h"
-
+#include "drivers/bootloader/bootloader_mmcsd_raw.h"
 
 /* This start address and length depends upon the linker memory for second stage SBL.
  *  It is necessary to change the below start address and length if in case the linker
@@ -242,6 +242,14 @@ void App_bootMultipleCoreEMMC()
         Bootloader_Params_init(&bootArray[inst].bootParams);
         Bootloader_BootImageInfo_init(&bootArray[inst].bootImageInfo);
         bootArray[inst].bootHandle = Bootloader_open(inst, &bootArray[inst].bootParams);
+
+        /* Change boot partition to UDA for A53 image */
+        if(inst == CONFIG_BOOTLOADER_EMMC_LINUX)
+        {
+            Bootloader_Config *tmpConfig = (Bootloader_Config *)(bootArray[inst].bootHandle);
+            ((Bootloader_MmcsdArgs *)(tmpConfig->args))->bootPartIndex = 0;
+        }
+
         if(bootArray[inst].bootHandle != NULL)
         {
            ((Bootloader_Config *)bootArray[inst].bootHandle)->scratchMemPtr = gAppimage;
diff --git a/source/drivers/bootloader/bootloader_mmcsd_raw.c b/source/drivers/bootloader/bootloader_mmcsd_raw.c
index d95359199..20484762a 100644
--- a/source/drivers/bootloader/bootloader_mmcsd_raw.c
+++ b/source/drivers/bootloader/bootloader_mmcsd_raw.c
@@ -55,6 +55,8 @@ static int32_t MMCSDRaw_imgOpen(void *args, Bootloader_Params *params)
 {
     Bootloader_MmcsdArgs *MMCSDArgs = (Bootloader_MmcsdArgs *)args;
     MMCSDArgs->curOffset = MMCSDArgs->appImageOffset;
+    /* Boot from eMMC Boot0 by default */
+    MMCSDArgs->bootPartIndex = 1;
     return SystemP_SUCCESS;
 }
 
@@ -72,7 +74,14 @@ static int32_t MMCSDRaw_imgRead(void *dst, uint32_t len, void *args)
 
     if(status == SystemP_SUCCESS)
     {
-        status = MMCSD_enableBootPartition(handle, 1);
+        if(MMCSDArgs->bootPartIndex == 0)
+        {
+            status = MMCSD_disableBootPartition(handle);
+        }
+        else
+        {
+            status = MMCSD_enableBootPartition(handle, MMCSDArgs->bootPartIndex);
+        }
 
         if(status != SystemP_SUCCESS)
         {
diff --git a/source/drivers/bootloader/bootloader_mmcsd_raw.h b/source/drivers/bootloader/bootloader_mmcsd_raw.h
index 2ca361fd0..383b593d1 100644
--- a/source/drivers/bootloader/bootloader_mmcsd_raw.h
+++ b/source/drivers/bootloader/bootloader_mmcsd_raw.h
@@ -50,7 +50,7 @@ typedef struct Bootloader_MmcsdArgs_s
     uint32_t MMCSDIndex;
     uint32_t curOffset;
     uint32_t appImageOffset;
-
+    uint32_t bootPartIndex;
 } Bootloader_MmcsdArgs;
 
 extern Bootloader_Fxns gBootloaderMmcsdFxns;