[U-Boot] [PATCH 17/28] armv8/fsl-lsch3: Enable system error aborts

Mark Rutland
2015-03-19T18:14:33Z

On Thu, Mar 19, 2015 at 04:45:48PM +0000, York Sun wrote:
> From: Scott Wood <scottwood@freescale.com>
>
> This lets us see the problems (close to) when they happen,
> rather than Linux hanging when it enables them prior to having a
> working console.

FYI, if the Linux driver for your UART supports earlycon, that should
work since commit 7a9c43bed891d1f8 ("setup: Move unmask of async
interrupts after possible earlycon setup").

I hope that SError is masked again prior to entering Linux, as required
by the boot protocol?

Mark.

> Signed-off-by: Scott Wood <scottwood@freescale.com>
> ---
> arch/arm/cpu/armv8/fsl-lsch3/cpu.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/arch/arm/cpu/armv8/fsl-lsch3/cpu.c b/arch/arm/cpu/armv8/fsl-lsch3/cpu.c
> index 07064a3..22b5fb2 100644
> --- a/arch/arm/cpu/armv8/fsl-lsch3/cpu.c
> +++ b/arch/arm/cpu/armv8/fsl-lsch3/cpu.c
> @@ -263,6 +263,10 @@ int arch_cpu_init(void)
> __asm_invalidate_tlb_all();
> early_mmu_setup();
> set_sctlr(get_sctlr() | CR_C);
> +
> + /* Enable system error aborts */
> + asm volatile("msr daifclr, #4" : : : "memory");
> +
> return 0;
> }
>
> --
> 1.7.9.5
>
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