blob: a9cb6aa447aadcf0c437097e4b42c83154f2d867 [file] [log] [blame]
#include <linux/mm.h>
/* Caches aren't brain-dead on the Alpha. */
#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_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_cache_vmap(start, end) do { } while (0)
#define flush_cache_vunmap(start, end) do { } while (0)
/* Note that the following two definitions are _highly_ dependent
on the contexts in which they are used in the kernel. I personally
think it is criminal how loosely defined these macros are. */
/* We need to flush the kernel's icache after loading modules. The
only other use of this macro is in load_aout_interp which is not
used on Alpha.
Note that this definition should *not* be used for userspace
icache flushing. While functional, it is _way_ overkill. The
icache is tagged with ASNs and it suffices to allocate a new ASN
for the process. */
#ifndef CONFIG_SMP
#define flush_icache_range(start, end) imb()
#define flush_icache_range(start, end) smp_imb()
extern void smp_imb(void);
/* We need to flush the userspace icache after setting breakpoints in
Instead of indiscriminately using imb, take advantage of the fact
that icache entries are tagged with the ASN and load a new mm context. */
/* ??? Ought to use this in arch/alpha/kernel/signal.c too. */
#ifndef CONFIG_SMP
#include <linux/sched.h>
extern void __load_new_mm_context(struct mm_struct *);
static inline void
flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
unsigned long addr, int len)
if (vma->vm_flags & VM_EXEC) {
struct mm_struct *mm = vma->vm_mm;
if (current->active_mm == mm)
mm->context[smp_processor_id()] = 0;
extern void flush_icache_user_range(struct vm_area_struct *vma,
struct page *page, unsigned long addr, int len);
/* This is used only in __do_fault and do_swap_page. */
#define flush_icache_page(vma, page) \
flush_icache_user_range((vma), (page), 0, 0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { memcpy(dst, src, len); \
flush_icache_user_range(vma, page, vaddr, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
#endif /* _ALPHA_CACHEFLUSH_H */