From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/m68k/include/asm/cacheflush_no.h | 101 ++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 arch/m68k/include/asm/cacheflush_no.h (limited to 'arch/m68k/include/asm/cacheflush_no.h') diff --git a/arch/m68k/include/asm/cacheflush_no.h b/arch/m68k/include/asm/cacheflush_no.h new file mode 100644 index 000000000..11e9a9dcb --- /dev/null +++ b/arch/m68k/include/asm/cacheflush_no.h @@ -0,0 +1,101 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _M68KNOMMU_CACHEFLUSH_H +#define _M68KNOMMU_CACHEFLUSH_H + +/* + * (C) Copyright 2000-2010, Greg Ungerer + */ +#include +#include + +#define flush_cache_all() __flush_cache_all() +#define flush_cache_mm(mm) do { } while (0) +#define flush_cache_dup_mm(mm) do { } while (0) +#define flush_cache_range(vma, start, end) do { } while (0) +#define flush_cache_page(vma, vmaddr) do { } while (0) +#define flush_dcache_range(start, len) __flush_dcache_all() +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 +#define flush_dcache_page(page) do { } while (0) +#define flush_dcache_mmap_lock(mapping) do { } while (0) +#define flush_dcache_mmap_unlock(mapping) do { } while (0) +#define flush_icache_range(start, len) __flush_icache_all() +#define flush_icache_page(vma,pg) do { } while (0) +#define flush_icache_user_range(vma,pg,adr,len) do { } while (0) +#define flush_cache_vmap(start, end) do { } while (0) +#define flush_cache_vunmap(start, end) do { } while (0) + +#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ + memcpy(dst, src, len) +#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ + memcpy(dst, src, len) + +void mcf_cache_push(void); + +static inline void __clear_cache_all(void) +{ +#ifdef CACHE_INVALIDATE + __asm__ __volatile__ ( + "movec %0, %%CACR\n\t" + "nop\n\t" + : : "r" (CACHE_INVALIDATE) ); +#endif +} + +static inline void __flush_cache_all(void) +{ +#ifdef CACHE_PUSH + mcf_cache_push(); +#endif + __clear_cache_all(); +} + +/* + * Some ColdFire parts implement separate instruction and data caches, + * on those we should just flush the appropriate cache. If we don't need + * to do any specific flushing then this will be optimized away. + */ +static inline void __flush_icache_all(void) +{ +#ifdef CACHE_INVALIDATEI + __asm__ __volatile__ ( + "movec %0, %%CACR\n\t" + "nop\n\t" + : : "r" (CACHE_INVALIDATEI) ); +#endif +} + +static inline void __flush_dcache_all(void) +{ +#ifdef CACHE_PUSH + mcf_cache_push(); +#endif +#ifdef CACHE_INVALIDATED + __asm__ __volatile__ ( + "movec %0, %%CACR\n\t" + "nop\n\t" + : : "r" (CACHE_INVALIDATED) ); +#else + /* Flush the write buffer */ + __asm__ __volatile__ ( "nop" ); +#endif +} + +/* + * Push cache entries at supplied address. We want to write back any dirty + * data and then invalidate the cache lines associated with this address. + */ +static inline void cache_push(unsigned long paddr, int len) +{ + __flush_cache_all(); +} + +/* + * Clear cache entries at supplied address (that is don't write back any + * dirty data). + */ +static inline void cache_clear(unsigned long paddr, int len) +{ + __clear_cache_all(); +} + +#endif /* _M68KNOMMU_CACHEFLUSH_H */ -- cgit v1.2.3