diff options
| author | Anup Patel <[email protected]> | 2025-12-09 11:01:30 +0530 |
|---|---|---|
| committer | Anup Patel <[email protected]> | 2025-12-16 20:14:08 +0530 |
| commit | 4339e85794571077f6436d8998b09dbd5755d258 (patch) | |
| tree | c35a3160d00beb9319049ecef82cb0f548135b2f | |
| parent | afc24152bb55927297716c72ef37f9d529893c55 (diff) | |
platform: generic: Keep some empty space in FDT passed to next stage
Leaving no empty space in the FDT passed to the next booting stage
causes the following U-Boot crash on Ventana internal platforms:
Unhandled exception: Load access fault
EPC: 00000000fffa6372 RA: 00000000fffa7418 TVAL: 0001746174730068
EPC: 0000000080245372 RA: 0000000080246418 reloc adjusted
SP: 00000000fef38440 GP: 00000000fef40e60 TP: 0000000000000000
T0: 00000000fef40a70 T1: 000000000000ff00 T2: 0000000000000000
S0: 00000000fffc17a8 S1: 00000000fef38d40 A0: 7375746174730068
A1: 00000000fffc17a8 A2: 0000000000000010 A3: 0000000000000010
A4: 0000000000000000 A5: 00000000fffc17b8 A6: 0000000000ff0000
A7: 000000000000b100 S2: 0000000000000000 S3: 0000000000000001
S4: 00000000fef38d40 S5: 7375746174730068 S6: 0000000000000000
S7: 00000000fef4eef0 S8: 00000000fef4ef90 S9: 0000000000000000
S10: 0000000000000000 S11: 00000000fef4efc0 T3: 00000000fef40ea8
T4: 0000000000ff0000 T5: 00000000fef40a60 T6: 00000000fef40a6c
To address the above issue, keep some minimal empty space in the
FDT instead of no empty space.
Fixes: bbe9a23060e9 ("platform: generic: Pack the FDT after applying fixups")
Signed-off-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
| -rw-r--r-- | platform/generic/Kconfig | 5 | ||||
| -rw-r--r-- | platform/generic/platform.c | 3 |
2 files changed, 8 insertions, 0 deletions
diff --git a/platform/generic/Kconfig b/platform/generic/Kconfig index 25b8886b..b1808012 100644 --- a/platform/generic/Kconfig +++ b/platform/generic/Kconfig @@ -23,6 +23,11 @@ config PLATFORM_GENERIC_MINOR_VER range 0 65535 default 1 +config PLATFORM_GENERIC_FDT_EMPTY_SPACE + int "Platform FDT empty space (KB)" + range 0 1024 + default 4 + config PLATFORM_ALLWINNER_D1 bool "Allwinner D1 support" depends on FDT_IRQCHIP_PLIC diff --git a/platform/generic/platform.c b/platform/generic/platform.c index e66f99fa..01fa03e0 100644 --- a/platform/generic/platform.c +++ b/platform/generic/platform.c @@ -245,7 +245,10 @@ int generic_final_init(bool cold_boot) fdt_fixups(fdt); fdt_domain_fixup(fdt); + /* Set the empty space in FDT based on kconfig option */ fdt_pack(fdt); + fdt_open_into(fdt, fdt, fdt_totalsize(fdt) + + CONFIG_PLATFORM_GENERIC_FDT_EMPTY_SPACE * 1024); return 0; } |