/*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2007 John Williams <john.williams@petalogix.com>
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* based on v850 version which was
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* Copyright (C) 2001,02,03 NEC Electronics Corporation
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* Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*
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*/
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#ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
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#define _ASM_MICROBLAZE_CACHEFLUSH_H
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/* Somebody depends on this; sigh... */
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#include <linux/mm.h>
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#include <linux/io.h>
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/* Look at Documentation/core-api/cachetlb.rst */
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/*
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* Cache handling functions.
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* Microblaze has a write-through data cache, meaning that the data cache
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* never needs to be flushed. The only flushing operations that are
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* implemented are to invalidate the instruction cache. These are called
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* after loading a user application into memory, we must invalidate the
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* instruction cache to make sure we don't fetch old, bad code.
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*/
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/* struct cache, d=dcache, i=icache, fl = flush, iv = invalidate,
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* suffix r = range */
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struct scache {
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/* icache */
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void (*ie)(void); /* enable */
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void (*id)(void); /* disable */
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void (*ifl)(void); /* flush */
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void (*iflr)(unsigned long a, unsigned long b);
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void (*iin)(void); /* invalidate */
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void (*iinr)(unsigned long a, unsigned long b);
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/* dcache */
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void (*de)(void); /* enable */
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void (*dd)(void); /* disable */
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void (*dfl)(void); /* flush */
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void (*dflr)(unsigned long a, unsigned long b);
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void (*din)(void); /* invalidate */
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void (*dinr)(unsigned long a, unsigned long b);
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};
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/* microblaze cache */
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extern struct scache *mbc;
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void microblaze_cache_init(void);
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#define enable_icache() mbc->ie();
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#define disable_icache() mbc->id();
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#define flush_icache() mbc->ifl();
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#define flush_icache_range(start, end) mbc->iflr(start, end);
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#define invalidate_icache() mbc->iin();
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#define invalidate_icache_range(start, end) mbc->iinr(start, end);
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#define flush_icache_user_range(vma, pg, adr, len) flush_icache();
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#define flush_icache_page(vma, pg) do { } while (0)
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#define enable_dcache() mbc->de();
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#define disable_dcache() mbc->dd();
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/* FIXME for LL-temac driver */
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#define invalidate_dcache() mbc->din();
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#define invalidate_dcache_range(start, end) mbc->dinr(start, end);
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#define flush_dcache() mbc->dfl();
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#define flush_dcache_range(start, end) mbc->dflr(start, end);
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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/* MS: We have to implement it because of rootfs-jffs2 issue on WB */
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#define flush_dcache_page(page) \
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do { \
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unsigned long addr = (unsigned long) page_address(page); /* virtual */ \
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addr = (u32)virt_to_phys((void *)addr); \
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flush_dcache_range((unsigned) (addr), (unsigned) (addr) + PAGE_SIZE); \
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} while (0);
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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#define flush_cache_dup_mm(mm) do { } while (0)
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#define flush_cache_vmap(start, end) do { } while (0)
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#define flush_cache_vunmap(start, end) do { } while (0)
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#define flush_cache_mm(mm) do { } while (0)
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#define flush_cache_page(vma, vmaddr, pfn) \
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flush_dcache_range(pfn << PAGE_SHIFT, (pfn << PAGE_SHIFT) + PAGE_SIZE);
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/* MS: kgdb code use this macro, wrong len with FLASH */
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#if 0
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#define flush_cache_range(vma, start, len) { \
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flush_icache_range((unsigned) (start), (unsigned) (start) + (len)); \
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flush_dcache_range((unsigned) (start), (unsigned) (start) + (len)); \
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}
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#endif
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#define flush_cache_range(vma, start, len) do { } while (0)
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static inline void copy_to_user_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr,
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void *dst, void *src, int len)
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{
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u32 addr = virt_to_phys(dst);
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memcpy(dst, src, len);
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if (vma->vm_flags & VM_EXEC) {
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invalidate_icache_range(addr, addr + PAGE_SIZE);
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flush_dcache_range(addr, addr + PAGE_SIZE);
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}
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}
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static inline void copy_from_user_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr,
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void *dst, void *src, int len)
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{
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memcpy(dst, src, len);
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}
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#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */
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