96 lines
3.0 KiB
C
96 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_SW64_CACHEFLUSH_H
|
|
#define _ASM_SW64_CACHEFLUSH_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <asm/hw_init.h>
|
|
|
|
/* Caches aren't brain-dead on the sw64. */
|
|
#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 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_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 sw64.
|
|
|
|
* 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
|
|
static inline void
|
|
flush_icache_range(unsigned long start, unsigned long end)
|
|
{
|
|
if (icache_is_vivt_no_ictag())
|
|
imb();
|
|
}
|
|
#define flush_icache_range flush_icache_range
|
|
#else
|
|
extern void smp_imb(void);
|
|
static inline void
|
|
flush_icache_range(unsigned long start, unsigned long end)
|
|
{
|
|
if (icache_is_vivt_no_ictag())
|
|
smp_imb();
|
|
}
|
|
#define flush_icache_range flush_icache_range
|
|
#endif
|
|
|
|
/* We need to flush the userspace icache after setting breakpoints in
|
|
* ptrace.
|
|
|
|
* 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/sw_64/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_page(struct vm_area_struct *vma, struct page *page,
|
|
unsigned long addr, int len)
|
|
{
|
|
if ((vma->vm_flags & VM_EXEC) && icache_is_vivt_no_ictag())
|
|
imb();
|
|
}
|
|
#define flush_icache_user_page flush_icache_user_page
|
|
#else
|
|
extern void flush_icache_user_page(struct vm_area_struct *vma,
|
|
struct page *page,
|
|
unsigned long addr, int len);
|
|
#define flush_icache_user_page flush_icache_user_page
|
|
#endif
|
|
|
|
/* This is used only in __do_fault and do_swap_page. */
|
|
#define flush_icache_page(vma, page) \
|
|
flush_icache_user_page((vma), (page), 0, 0)
|
|
|
|
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
|
|
do { \
|
|
memcpy(dst, src, len); \
|
|
flush_icache_user_page(vma, page, vaddr, len); \
|
|
} while (0)
|
|
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
|
|
memcpy(dst, src, len)
|
|
|
|
#include <asm-generic/cacheflush.h>
|
|
|
|
#endif /* _ASM_SW64_CACHEFLUSH_H */
|