On 10:47-20230301, Tom Rini wrote:
> On Wed, Mar 01, 2023 at 03:01:30PM +0530, Manorit Chawdhry wrote:
>
> > 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:
> > ┌─────────────────────────────────────┐ 0x41c00000
> > │ SPL │
> > ├─────────────────────────────────────┤ 0x41c40000 (approx)
> > │ STACK │
> > ├─────────────────────────────────────┤ 0x41c85b20
> > │ Global data │
> > │ sizeof(struct global_data) = 0xd8 │
> > ├─────────────────────────────────────┤ gd->malloc_base = 0x41c85bfc
> > │ HEAP │
> > │ CONFIG_SYS_MALLOC_F_LEN = 0x70000 │
> > ├─────────────────────────────────────┤ CONFIG_SPL_BSS_START_ADDR
> > │ SPL BSS │ (0x41cf5bfc)
> > │ CONFIG_SPL_BSS_MAX_SIZE = 0xA000 │
> > └─────────────────────────────────────┘ CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX
> > (0x41cffbfc)
> >
> > New Map:
> > ┌─────────────────────────────────────┐ 0x41c00000
> > │ SPL │
> > ├─────────────────────────────────────┤ 0x41c40000 (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 = 0x70000 │
> > ├─────────────────────────────────────┤ 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 <m-chawd...@ti.com>
> > [n-fran...@ti.com: SRAM allocation addressing diagram]
> > Signed-off-by: Neha Francis <n-fran...@ti.com>
>
> Reviewed-by: Tom Rini <tr...@konsulko.com>
>
> But can we please get that map information in something under
> doc/board/ti/ as a follow-up?
>
Hi Tom,
Sure, I'll be updating the same and sending a v3.
Thanks and regards,
Manorit
> --
> Tom
