/* * OpenRISC Linux * * Linux architectural port borrowing liberally from similar works of * others. All original copyrights apply as per the original source * declaration. * * OpenRISC implementation: * Copyright (C) Jan Henrik Weinstock <jan.weinstock@rwth-aachen.de> * et al. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #ifndef __ASM_CACHEFLUSH_H #define __ASM_CACHEFLUSH_H #include <linux/mm.h> /* * Helper function for flushing or invalidating entire pages from data * and instruction caches. SMP needs a little extra work, since we need * to flush the pages on all cpus. */ extern void local_dcache_page_flush(struct page *page); extern void local_icache_page_inv(struct page *page); /* * Data cache flushing always happen on the local cpu. Instruction cache * invalidations need to be broadcasted to all other cpu in the system in * case of SMP configurations. */ #ifndef CONFIG_SMP #define dcache_page_flush(page) local_dcache_page_flush(page) #define icache_page_inv(page) local_icache_page_inv(page) #else /* CONFIG_SMP */ #define dcache_page_flush(page) local_dcache_page_flush(page) #define icache_page_inv(page) smp_icache_page_inv(page) extern void smp_icache_page_inv(struct page *page); #endif /* CONFIG_SMP */ /* * Synchronizes caches. Whenever a cpu writes executable code to memory, this * should be called to make sure the processor sees the newly written code. */ static inline void sync_icache_dcache(struct page *page) { if (!IS_ENABLED(CONFIG_DCACHE_WRITETHROUGH)) dcache_page_flush(page); icache_page_inv(page); } /* * Pages with this bit set need not be flushed/invalidated, since * they have not changed since last flush. New pages start with * PG_arch_1 not set and are therefore dirty by default. */ #define PG_dc_clean PG_arch_1 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 static inline void flush_dcache_page(struct page *page) { clear_bit(PG_dc_clean, &page->flags); } /* * Other interfaces are not required since we do not have virtually * indexed or tagged caches. So we can use the default here. */ #define flush_cache_all() do { } while (0) #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, pfn) 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, end) do { } while (0) #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) \ do { \ memcpy(dst, src, len); \ if (vma->vm_flags & VM_EXEC) \ sync_icache_dcache(page); \ } while (0) #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ memcpy(dst, src, len) #endif /* __ASM_CACHEFLUSH_H */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
bitops | Folder | 0755 |
|
|
Kbuild | File | 997 B | 0644 |
|
asm-offsets.h | File | 35 B | 0644 |
|
atomic.h | File | 3.02 KB | 0644 |
|
barrier.h | File | 203 B | 0644 |
|
bitops.h | File | 1.5 KB | 0644 |
|
cache.h | File | 888 B | 0644 |
|
cacheflush.h | File | 3.37 KB | 0644 |
|
cmpxchg.h | File | 3.92 KB | 0644 |
|
cpuinfo.h | File | 970 B | 0644 |
|
delay.h | File | 670 B | 0644 |
|
dma-mapping.h | File | 968 B | 0644 |
|
elf.h | File | 2.02 KB | 0644 |
|
fixmap.h | File | 2.74 KB | 0644 |
|
futex.h | File | 2.24 KB | 0644 |
|
io.h | File | 1.31 KB | 0644 |
|
irq.h | File | 835 B | 0644 |
|
irqflags.h | File | 866 B | 0644 |
|
linkage.h | File | 764 B | 0644 |
|
mmu.h | File | 728 B | 0644 |
|
mmu_context.h | File | 1.3 KB | 0644 |
|
page.h | File | 2.54 KB | 0644 |
|
pgalloc.h | File | 2.57 KB | 0644 |
|
pgtable.h | File | 13.96 KB | 0644 |
|
processor.h | File | 2.7 KB | 0644 |
|
ptrace.h | File | 3.33 KB | 0644 |
|
serial.h | File | 1.11 KB | 0644 |
|
smp.h | File | 822 B | 0644 |
|
spinlock.h | File | 985 B | 0644 |
|
spinlock_types.h | File | 188 B | 0644 |
|
spr.h | File | 1.17 KB | 0644 |
|
spr_defs.h | File | 22.91 KB | 0644 |
|
string.h | File | 324 B | 0644 |
|
syscall.h | File | 1.91 KB | 0644 |
|
syscalls.h | File | 1.04 KB | 0644 |
|
thread_info.h | File | 3.85 KB | 0644 |
|
time.h | File | 627 B | 0644 |
|
timex.h | File | 914 B | 0644 |
|
tlb.h | File | 1.01 KB | 0644 |
|
tlbflush.h | File | 2.05 KB | 0644 |
|
uaccess.h | File | 7.98 KB | 0644 |
|
unaligned.h | File | 1.7 KB | 0644 |
|
unwinder.h | File | 557 B | 0644 |
|