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/*
 * Copyright 2010 Tilera Corporation. All Rights Reserved.
 *
 *   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, version 2.
 *
 *   This program is distributed in the hope that it will be useful, but
 *   WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *   NON INFRINGEMENT.  See the GNU General Public License for
 *   more details.
 */

#ifndef _ASM_TILE_CACHEFLUSH_H
#define _ASM_TILE_CACHEFLUSH_H

#include <arch/chip.h>

/* Keep includes the same across arches.  */
#include <linux/mm.h>
#include <linux/cache.h>
#include <arch/icache.h>

/* Caches are physically-indexed and so don't need special treatment */
#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)
#define flush_icache_page(vma, pg)		do { } while (0)
#define flush_icache_user_range(vma, pg, adr, len)	do { } while (0)

/* Flush the icache just on this cpu */
extern void __flush_icache_range(unsigned long start, unsigned long end);

/* Flush the entire icache on this cpu. */
#define __flush_icache() __flush_icache_range(0, CHIP_L1I_CACHE_SIZE())

#ifdef CONFIG_SMP
/*
 * When the kernel writes to its own text we need to do an SMP
 * broadcast to make the L1I coherent everywhere.  This includes
 * module load and single step.
 */
extern void flush_icache_range(unsigned long start, unsigned long end);
#else
#define flush_icache_range __flush_icache_range
#endif

/*
 * An update to an executable user page requires icache flushing.
 * We could carefully update only tiles that are running this process,
 * and rely on the fact that we flush the icache on every context
 * switch to avoid doing extra work here.  But for now, I'll be
 * conservative and just do a global icache flush.
 */
static inline void copy_to_user_page(struct vm_area_struct *vma,
				     struct page *page, unsigned long vaddr,
				     void *dst, void *src, int len)
{
	memcpy(dst, src, len);
	if (vma->vm_flags & VM_EXEC) {
		flush_icache_range((unsigned long) dst,
				   (unsigned long) dst + len);
	}
}

#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
	memcpy((dst), (src), (len))

/* Flush a VA range; pads to L2 cacheline boundaries. */
static inline void __flush_buffer(void *buffer, size_t size)
{
	char *next = (char *)((long)buffer & -L2_CACHE_BYTES);
	char *finish = (char *)L2_CACHE_ALIGN((long)buffer + size);
	while (next < finish) {
		__insn_flush(next);
		next += CHIP_FLUSH_STRIDE();
	}
}

/* Flush & invalidate a VA range; pads to L2 cacheline boundaries. */
static inline void __finv_buffer(void *buffer, size_t size)
{
	char *next = (char *)((long)buffer & -L2_CACHE_BYTES);
	char *finish = (char *)L2_CACHE_ALIGN((long)buffer + size);
	while (next < finish) {
		__insn_finv(next);
		next += CHIP_FINV_STRIDE();
	}
}


/*
 * Flush a locally-homecached VA range and wait for the evicted
 * cachelines to hit memory.
 */
static inline void flush_buffer_local(void *buffer, size_t size)
{
	__flush_buffer(buffer, size);
	mb_incoherent();
}

/*
 * Flush and invalidate a locally-homecached VA range and wait for the
 * evicted cachelines to hit memory.
 */
static inline void finv_buffer_local(void *buffer, size_t size)
{
	__finv_buffer(buffer, size);
	mb_incoherent();
}

#ifdef __tilepro__
/* Invalidate a VA range; pads to L2 cacheline boundaries. */
static inline void __inv_buffer(void *buffer, size_t size)
{
	char *next = (char *)((long)buffer & -L2_CACHE_BYTES);
	char *finish = (char *)L2_CACHE_ALIGN((long)buffer + size);
	while (next < finish) {
		__insn_inv(next);
		next += CHIP_INV_STRIDE();
	}
}

/* Invalidate a VA range and wait for it to be complete. */
static inline void inv_buffer(void *buffer, size_t size)
{
	__inv_buffer(buffer, size);
	mb();
}
#endif

/*
 * Flush and invalidate a VA range that is homed remotely, waiting
 * until the memory controller holds the flushed values.  If "hfh" is
 * true, we will do a more expensive flush involving additional loads
 * to make sure we have touched all the possible home cpus of a buffer
 * that is homed with "hash for home".
 */
void finv_buffer_remote(void *buffer, size_t size, int hfh);

/*
 * On SMP systems, when the scheduler does migration-cost autodetection,
 * it needs a way to flush as much of the CPU's caches as possible:
 *
 * TODO: fill this in!
 */
static inline void sched_cacheflush(void)
{
}

#endif /* _ASM_TILE_CACHEFLUSH_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 439 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 5.14 KB 0644
atomic_32.h File 8.91 KB 0644
atomic_64.h File 5.51 KB 0644
backtrace.h File 3.98 KB 0644
barrier.h File 2.89 KB 0644
bitops.h File 2.37 KB 0644
bitops_32.h File 4.01 KB 0644
bitops_64.h File 2.67 KB 0644
cache.h File 2.6 KB 0644
cacheflush.h File 4.94 KB 0644
checksum.h File 1.23 KB 0644
cmpxchg.h File 3.47 KB 0644
compat.h File 7.38 KB 0644
current.h File 947 B 0644
delay.h File 1.1 KB 0644
device.h File 978 B 0644
div64.h File 319 B 0644
dma-mapping.h File 1.82 KB 0644
dma.h File 762 B 0644
elf.h File 5.42 KB 0644
fixmap.h File 2.73 KB 0644
ftrace.h File 1.08 KB 0644
futex.h File 4.23 KB 0644
hardirq.h File 1.28 KB 0644
hardwall.h File 1.08 KB 0644
highmem.h File 2.08 KB 0644
homecache.h File 4.21 KB 0644
hugetlb.h File 3.04 KB 0644
hv_driver.h File 1.92 KB 0644
ide.h File 758 B 0644
insn.h File 1.79 KB 0644
io.h File 12.43 KB 0644
irq.h File 3.11 KB 0644
irq_work.h File 283 B 0644
irqflags.h File 10.55 KB 0644
jump_label.h File 1.47 KB 0644
kdebug.h File 769 B 0644
kexec.h File 2.23 KB 0644
kgdb.h File 1.99 KB 0644
kmap_types.h File 1.02 KB 0644
kprobes.h File 2.19 KB 0644
linkage.h File 1.46 KB 0644
mmu.h File 965 B 0644
mmu_context.h File 4.5 KB 0644
mmzone.h File 2.07 KB 0644
module.h File 1.12 KB 0644
page.h File 10.32 KB 0644
pci.h File 6.58 KB 0644
percpu.h File 1.79 KB 0644
perf_event.h File 766 B 0644
pgalloc.h File 4.76 KB 0644
pgtable.h File 15.66 KB 0644
pgtable_32.h File 4.08 KB 0644
pgtable_64.h File 5.11 KB 0644
pmc.h File 2.15 KB 0644
processor.h File 10.62 KB 0644
ptrace.h File 2.96 KB 0644
sections.h File 1.37 KB 0644
setup.h File 1.63 KB 0644
sigframe.h File 956 B 0644
signal.h File 1.07 KB 0644
smp.h File 3.98 KB 0644
spinlock.h File 741 B 0644
spinlock_32.h File 2.9 KB 0644
spinlock_64.h File 3.88 KB 0644
spinlock_types.h File 1.58 KB 0644
stack.h File 2.59 KB 0644
string.h File 1.19 KB 0644
switch_to.h File 2.75 KB 0644
syscall.h File 2.88 KB 0644
syscalls.h File 2.35 KB 0644
thread_info.h File 5.54 KB 0644
tile-desc.h File 650 B 0644
tile-desc_32.h File 12.54 KB 0644
tile-desc_64.h File 10.83 KB 0644
timex.h File 1.71 KB 0644
tlb.h File 878 B 0644
tlbflush.h File 3.99 KB 0644
topology.h File 1.52 KB 0644
traps.h File 2.44 KB 0644
uaccess.h File 12.77 KB 0644
unaligned.h File 1.56 KB 0644
unistd.h File 777 B 0644
user.h File 717 B 0644
vdso.h File 1.84 KB 0644
vga.h File 1.05 KB 0644
word-at-a-time.h File 1.07 KB 0644