On Sunday 12 October 2014 20:13:55 Stefan Agner wrote:
> Add support for !MMU low level debug required for the secondary
> Cortex-M4 core in Vybrid.
>
> Signed-off-by: Stefan Agner <[email protected]>
> ---
> arch/arm/include/debug/vf.S | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm/include/debug/vf.S b/arch/arm/include/debug/vf.S
> index b889338..63c7ef7 100644
> --- a/arch/arm/include/debug/vf.S
> +++ b/arch/arm/include/debug/vf.S
> @@ -17,12 +17,22 @@
>
> #define VF_UART_VIRTUAL_BASE 0xfe000000
>
> +#ifdef CONFIG_MMU
> +
> .macro addruart, rp, rv, tmp
> ldr \rp, =VF_UART_PHYSICAL_BASE @ physical
> and \rv, \rp, #0xffffff @ offset within 16MB section
> add \rv, \rv, #VF_UART_VIRTUAL_BASE
> .endm
>
> +#else /* !CONFIG_MMU */
> +
> + .macro addruart, rx, tmp
> + ldr \rx, =(VF_UART_PHYSICAL_BASE) @ physical
> + .endm
> +
> +#endif /* CONFIG_MMU */
> +
> .macro senduart, rd, rx
> strb \rd, [\rx, #0x7] @ Data Register
> .endm
>
Hmm, I've previously needed to add this patch for randconfig testing:
index 78c91b5f97d4..ea9646cc2a0e 100644
--- a/arch/arm/kernel/debug.S
+++ b/arch/arm/kernel/debug.S
@@ -35,7 +35,7 @@
#else /* !CONFIG_MMU */
.macro addruart_current, rx, tmp1, tmp2
- addruart \rx, \tmp1
+ addruart \rx, \tmp1, \tmp2
.endm
#endif /* CONFIG_MMU */
If we do this instead, could we avoid your patch?
Arnd
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