In non-combined boot flow for K3, all the firewalls are locked by default
until sysfw comes up. Rom configures some of the firewall for its usage
along with the SRAM for R5 but the PSRAM region is still locked.
The K3 MCU Scratchpad for j721e was set to a PSRAM region triggering the
firewall exception before sysfw came up. The exception started happening
after adding multi dtb support that accesses the scratchpad for reading
EEPROM contents.
The commit changes R5 MCU scratchpad for j721e to an SRAM region.
Old Map:
┌─┐ 0x41c0
│ SPL │
├─┤ 0x41c4 (approx)
│STACK│
├─┤ 0x41c85b20
│ Global data │
│ sizeof(struct global_data) = 0xd8 │
├─┤ gd->malloc_base = 0x41c85bfc
│HEAP │
│ CONFIG_SYS_MALLOC_F_LEN = 0x7 │
├─┤ CONFIG_SPL_BSS_START_ADDR
│ SPL BSS │ (0x41cf5bfc)
│ CONFIG_SPL_BSS_MAX_SIZE = 0xA000 │
└─┘ CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX
(0x41cffbfc)
New Map:
┌─┐ 0x41c0
│ SPL │
├─┤ 0x41c4 (approx)
│EMPTY│
├─┤ 0x41c81920
│STACK│
│ SPL_SIZE_LIMIT_PROVIDE_STACK=0x4000 │
├─┤ 0x41c85920
│ Global data │
│ sizeof(struct global_data) = 0xd8 │
├─┤ gd->malloc_base = 0x41c859f0
│HEAP │
│ CONFIG_SYS_MALLOC_F_LEN = 0x7 │
├─┤ CONFIG_SPL_BSS_START_ADDR
│ SPL BSS │ (0x41cf59f0)
│ CONFIG_SPL_BSS_MAX_SIZE = 0xA000 │
├─┤ 0x41cff9fc
│ NEW MCU SCRATCHPAD │
│ SYS_K3_MCU_SCRATCHPAD_SIZE = 0x200 │
└─┘ CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX
(0x41cffbfc)
Fixes: ab977c8b91b4 ("configs: j721s2_evm_r5: Enable support for building
multiple dtbs into FIT")
Signed-off-by: Manorit Chawdhry
[n-fran...@ti.com: SRAM allocation addressing diagram]
Signed-off-by: Neha Francis
Reviewed-by: Tom Rini
Reviewed-by: Kamlesh Gurudasani
---
arch/arm/mach-k3/Kconfig | 3 ++-
configs/j721e_evm_r5_defconfig | 10 --
doc/board/ti/j721e_evm.rst | 43 ++
3 files changed, 53 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
index 0ffbbf9168e8..0991b42423a0 100644
--- a/arch/arm/mach-k3/Kconfig
+++ b/arch/arm/mach-k3/Kconfig
@@ -52,7 +52,8 @@ config SYS_K3_MAX_DOWNLODABLE_IMAGE_SIZE
config SYS_K3_MCU_SCRATCHPAD_BASE
hex
default 0x4028 if SOC_K3_AM654
- default 0x41cff9fc if SOC_K3_J721E || SOC_K3_J721S2
+ default 0x4028 if SOC_K3_J721S2
+ default 0x41cff9fc if SOC_K3_J721E
help
Describes the base address of MCU Scratchpad RAM.
diff --git a/configs/j721e_evm_r5_defconfig b/configs/j721e_evm_r5_defconfig
index 476072659571..afe1f3a31306 100644
--- a/configs/j721e_evm_r5_defconfig
+++ b/configs/j721e_evm_r5_defconfig
@@ -21,10 +21,16 @@ CONFIG_SPL_MMC=y
CONFIG_SPL_SERIAL=y
CONFIG_SPL_DRIVERS_MISC=y
CONFIG_SPL_STACK_R_ADDR=0x8200
+CONFIG_SPL_SIZE_LIMIT=0xf59f0
+CONFIG_SPL_SIZE_LIMIT_SUBTRACT_GD=y
+CONFIG_SPL_SIZE_LIMIT_SUBTRACT_MALLOC=y
+CONFIG_SPL_SIZE_LIMIT_PROVIDE_STACK=0x4000
CONFIG_SPL_FS_FAT=y
CONFIG_SPL_LIBDISK_SUPPORT=y
CONFIG_SPL_SPI_FLASH_SUPPORT=y
CONFIG_SPL_SPI=y
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x41cf59f0
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
CONFIG_SPL_LOAD_FIT=y
CONFIG_SPL_LOAD_FIT_ADDRESS=0x8008
@@ -32,9 +38,9 @@ CONFIG_SPL_FIT_IMAGE_POST_PROCESS=y
CONFIG_OF_BOARD_SETUP=y
CONFIG_USE_BOOTCOMMAND=y
# CONFIG_DISPLAY_CPUINFO is not set
-CONFIG_SPL_MAX_SIZE=0xc
+CONFIG_SPL_MAX_SIZE=0xf59f0
CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
-CONFIG_SPL_BSS_START_ADDR=0x41cf5bfc
+CONFIG_SPL_BSS_START_ADDR=0x41cf59f0
CONFIG_SPL_BSS_MAX_SIZE=0xa000
CONFIG_SPL_BOARD_INIT=y
CONFIG_SPL_STACK_R=y
diff --git a/doc/board/ti/j721e_evm.rst b/doc/board/ti/j721e_evm.rst
index e898601c41ea..feaa2da5e9ac 100644
--- a/doc/board/ti/j721e_evm.rst
+++ b/doc/board/ti/j721e_evm.rst
@@ -268,6 +268,49 @@ Image formats:
| +---+ |
+---+
+R5 Memory Map:
+--
+
+.. list-table::
+ :widths: 16 16 16
+ :header-rows: 1
+
+ * - Region
+ - Start Address
+ - End Address
+
+ * - SPL
+ - 0x41c0
+ - 0x41c
