[PATCH v2 2/3] Kconfig: j721s2: Change K3_MCU_SCRATCHPAD_BASE to non firewalled region

[Manorit Chawdhry]

On K3 HS-SE devices 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 j721s2 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.

Old map:
┌─────────────────────────────────────┐ 0x41c00000
│                 SPL                 │
├─────────────────────────────────────┤ 0x41c61f20 (approx)
│                STACK                │
├─────────────────────────────────────┤ 0x41c65f20
│             Global data             │
│  sizeof(struct global_data) = 0xd8  │
├─────────────────────────────────────┤ gd->malloc_base = 0x41c66000
│                HEAP                 │
│  CONFIG_SYS_MALLOC_F_LEN = 0x10000  │
├─────────────────────────────────────┤ CONFIG_SPL_BSS_START_ADDR
│               SPL BSS               │ (0x41c76000)
│  CONFIG_SPL_BSS_MAX_SIZE = 0xA000   │
├─────────────────────────────────────┤ (0x41c80000)
│               DM DATA               │
├─────────────────────────────────────┤ (0x41c84130) (approx)
│                EMPTY                │
└─────────────────────────────────────┘ CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX
				        (0x41cffbfc)

New map:
┌─────────────────────────────────────┐ 0x41c00000
│                 SPL                 │
├─────────────────────────────────────┤ 0x41c61f20 (approx)
│                STACK                │
├─────────────────────────────────────┤ 0x41c65f20
│             Global data             │
│  sizeof(struct global_data) = 0xd8  │
├─────────────────────────────────────┤ gd->malloc_base = 0x41c66000
│                HEAP                 │
│  CONFIG_SYS_MALLOC_F_LEN = 0x10000  │
├─────────────────────────────────────┤ CONFIG_SPL_BSS_START_ADDR
│               SPL BSS               │ (0x41c76000)
│  CONFIG_SPL_BSS_MAX_SIZE = 0xA000   │
├─────────────────────────────────────┤ (0x41c80000)
│               DM DATA               │
├─────────────────────────────────────┤ (0x41c84130) (approx)
│                EMPTY                │
├─────────────────────────────────────┤ SYS_K3_MCU_SCRATCHPAD_BASE
│              SCRATCHPAD             │ (0x41cff9fc)
│ SYS_K3_MCU_SCRATCHPAD_SIZE = 0x200  │
└─────────────────────────────────────┘ CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX
				        (0x41cffbfc)

Reviewed-by: Kamlesh Gurudasani <kamlesh at ti.com>
Signed-off-by: Manorit Chawdhry <m-chawdhry at ti.com>
---
 arch/arm/mach-k3/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
index bae0a827c29f..bf1c3c51a41c 100644
--- a/arch/arm/mach-k3/Kconfig
+++ b/arch/arm/mach-k3/Kconfig
@@ -52,7 +52,7 @@ config SYS_K3_MAX_DOWNLODABLE_IMAGE_SIZE
 config SYS_K3_MCU_SCRATCHPAD_BASE
 	hex
 	default 0x40280000 if SOC_K3_AM654
-	default 0x40280000 if SOC_K3_J721S2
+	default 0x41cff9fc if SOC_K3_J721S2
 	default 0x41cff9fc if SOC_K3_J721E
 	help
 	  Describes the base address of MCU Scratchpad RAM.

-- 
2.34.1