On Thu, May 04, 2023 at 11:07:07AM +0530, Manorit Chawdhry wrote:
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@ti.com Signed-off-by: Manorit Chawdhry m-chawdhry@ti.com
Applied to u-boot/master, thanks!