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| author | Andrew F. Davis <afd@ti.com> | 2018-11-19 14:47:53 -0600 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-11-26 22:52:12 -0500 |
| commit | a0106c82d677c611e479a6243f7a08252284e0f0 (patch) | |
| tree | a79af7cd646f75c902f038f7c9d741b060e7b666 /arch/arm/cpu | |
| parent | 958d46b53f3e3683a3d227a20c1935cbe88a8d65 (diff) | |
| download | u-boot-a0106c82d677c611e479a6243f7a08252284e0f0.tar.gz u-boot-a0106c82d677c611e479a6243f7a08252284e0f0.tar.xz u-boot-a0106c82d677c611e479a6243f7a08252284e0f0.zip | |
ARM: armv7: Add early stack for erratum workarounds
Some erratum workarounds call into C code before the stack
is setup, this can lead to values pushed onto the stack
being lost, firewall exceptions, and other undefined behavior.
Setup a temporary stack to allow these functions to work
correctly.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Andreas Dannenberg <dannenberg@ti.com>
Reviewed-by: Nishanth Menon <nm@ti.com>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv7/start.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index 81edec01bf..0cb6dd39cc 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -205,6 +205,15 @@ ENTRY(cpu_init_cp15) mov r2, r3, lsl #4 @ shift variant field for combined value orr r2, r4, r2 @ r2 has combined CPU variant + revision +/* Early stack for ERRATA that needs into call C code */ +#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK) + ldr r0, =(CONFIG_SPL_STACK) +#else + ldr r0, =(CONFIG_SYS_INIT_SP_ADDR) +#endif + bic r0, r0, #7 /* 8-byte alignment for ABI compliance */ + mov sp, r0 + #ifdef CONFIG_ARM_ERRATA_798870 cmp r2, #0x30 @ Applies to lower than R3p0 bge skip_errata_798870 @ skip if not affected rev |