On 03/21/2016 02:37 AM, Vasily Khoruzhick wrote:
> Tested with OHCI and pxafb drivers - no issues found
>
> Signed-off-by: Vasily Khoruzhick <anars...@gmail.com>
> ---
> arch/arm/cpu/pxa/Makefile | 1 +
> arch/arm/cpu/pxa/cache.c | 62
> ++++++++++++++++++++++++++++++++++++++++++++
> arch/arm/cpu/pxa/pxa2xx.c | 10 +++++++
> include/configs/pxa-common.h | 1 +
> 4 files changed, 74 insertions(+)
> create mode 100644 arch/arm/cpu/pxa/cache.c
>
> diff --git a/arch/arm/cpu/pxa/Makefile b/arch/arm/cpu/pxa/Makefile
> index 3ee08cd..79fcb73 100644
> --- a/arch/arm/cpu/pxa/Makefile
> +++ b/arch/arm/cpu/pxa/Makefile
> @@ -14,3 +14,4 @@ obj-y += cpuinfo.o
> obj-y += timer.o
> obj-y += usb.o
> obj-y += relocate.o
> +obj-y += cache.o
> diff --git a/arch/arm/cpu/pxa/cache.c b/arch/arm/cpu/pxa/cache.c
> new file mode 100644
> index 0000000..7aba112
> --- /dev/null
> +++ b/arch/arm/cpu/pxa/cache.c
> @@ -0,0 +1,62 @@
> +/*
> + * (C) Copyright 2016 Vasily Khoruzhick <anars...@gmail.com>
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#include <linux/types.h>
> +#include <common.h>
> +
> +#ifndef CONFIG_SYS_DCACHE_OFF
> +
> +#ifndef CONFIG_SYS_CACHELINE_SIZE
> +#define CONFIG_SYS_CACHELINE_SIZE 32
This condition where CONFIG_SYS_CACHELINE_SIZE is undefined must not
ever happen.
> +#endif
> +
> +void invalidate_dcache_all(void)
> +{
> + /* Flush/Invalidate I cache */
> + asm volatile("mcr p15, 0, %0, c7, c5, 0\n" : : "r"(0));
> + /* Flush/Invalidate D cache */
> + asm volatile("mcr p15, 0, %0, c7, c6, 0\n" : : "r"(0));
> +}
> +
> +void flush_dcache_all(void)
> +{
> + return invalidate_dcache_all();
> +}
> +
> +void invalidate_dcache_range(unsigned long start, unsigned long stop)
> +{
> + start &= ~(CONFIG_SYS_CACHELINE_SIZE - 1);
> + stop &= ~(CONFIG_SYS_CACHELINE_SIZE - 1);
Apply same sanity check as armv7 does please.
> + while (start <= stop) {
> + asm volatile("mcr p15, 0, %0, c7, c6, 1\n" : : "r"(start));
> + start += CONFIG_SYS_CACHELINE_SIZE;
> + }
> +}
> +
> +void flush_dcache_range(unsigned long start, unsigned long stop)
> +{
> + return invalidate_dcache_range(start, stop);
> +}
> +#else /* #ifndef CONFIG_SYS_DCACHE_OFF */
> +void invalidate_dcache_all(void)
> +{
> +}
> +
> +void flush_dcache_all(void)
> +{
> +}
> +#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
> +
> +/*
> + * Stub implementations for l2 cache operations
> + */
> +
> +__weak void l2_cache_disable(void) {}
> +
> +#if defined CONFIG_SYS_THUMB_BUILD
> +__weak void invalidate_l2_cache(void) {}
> +#endif
> diff --git a/arch/arm/cpu/pxa/pxa2xx.c b/arch/arm/cpu/pxa/pxa2xx.c
> index 2f12fb9..77f0ef2 100644
> --- a/arch/arm/cpu/pxa/pxa2xx.c
> +++ b/arch/arm/cpu/pxa/pxa2xx.c
> @@ -284,3 +284,13 @@ void reset_cpu(ulong ignored)
> for (;;)
> ;
> }
> +
> +void enable_caches(void)
> +{
> +#ifndef CONFIG_SYS_ICACHE_OFF
> + icache_enable();
> +#endif
> +#ifndef CONFIG_SYS_DCACHE_OFF
> + dcache_enable();
> +#endif
> +}
> diff --git a/include/configs/pxa-common.h b/include/configs/pxa-common.h
> index 4c1c2c7..7295687 100644
> --- a/include/configs/pxa-common.h
> +++ b/include/configs/pxa-common.h
> @@ -10,6 +10,7 @@
> #define __CONFIG_PXA_COMMON_H__
>
> #define CONFIG_DISPLAY_CPUINFO
> +#define CONFIG_SYS_ARM_CACHE_WRITETHROUGH
>
> /*
> * KGDB
>
--
Best regards,
Marek Vasut
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