linux/arch/hexagon/mm/cache.c
Thomas Gleixner 08dbd0f8ef treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 and
  only version 2 as published by the free software foundation 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 see the gnu
  general public license for more details you should have received a
  copy of the gnu general public license along with this program if
  not write to the free software foundation inc 51 franklin street
  fifth floor boston ma 02110 1301 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 94 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141334.043630402@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:30:29 +02:00

127 lines
2.3 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Cache management functions for Hexagon
*
* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
*/
#include <linux/mm.h>
#include <asm/cacheflush.h>
#include <asm/hexagon_vm.h>
#define spanlines(start, end) \
(((end - (start & ~(LINESIZE - 1))) >> LINEBITS) + 1)
void flush_dcache_range(unsigned long start, unsigned long end)
{
unsigned long lines = spanlines(start, end-1);
unsigned long i, flags;
start &= ~(LINESIZE - 1);
local_irq_save(flags);
for (i = 0; i < lines; i++) {
__asm__ __volatile__ (
" dccleaninva(%0); "
:
: "r" (start)
);
start += LINESIZE;
}
local_irq_restore(flags);
}
void flush_icache_range(unsigned long start, unsigned long end)
{
unsigned long lines = spanlines(start, end-1);
unsigned long i, flags;
start &= ~(LINESIZE - 1);
local_irq_save(flags);
for (i = 0; i < lines; i++) {
__asm__ __volatile__ (
" dccleana(%0); "
" icinva(%0); "
:
: "r" (start)
);
start += LINESIZE;
}
__asm__ __volatile__ (
"isync"
);
local_irq_restore(flags);
}
EXPORT_SYMBOL(flush_icache_range);
void hexagon_clean_dcache_range(unsigned long start, unsigned long end)
{
unsigned long lines = spanlines(start, end-1);
unsigned long i, flags;
start &= ~(LINESIZE - 1);
local_irq_save(flags);
for (i = 0; i < lines; i++) {
__asm__ __volatile__ (
" dccleana(%0); "
:
: "r" (start)
);
start += LINESIZE;
}
local_irq_restore(flags);
}
void hexagon_inv_dcache_range(unsigned long start, unsigned long end)
{
unsigned long lines = spanlines(start, end-1);
unsigned long i, flags;
start &= ~(LINESIZE - 1);
local_irq_save(flags);
for (i = 0; i < lines; i++) {
__asm__ __volatile__ (
" dcinva(%0); "
:
: "r" (start)
);
start += LINESIZE;
}
local_irq_restore(flags);
}
/*
* This is just really brutal and shouldn't be used anyways,
* especially on V2. Left here just in case.
*/
void flush_cache_all_hexagon(void)
{
unsigned long flags;
local_irq_save(flags);
__vmcache_ickill();
__vmcache_dckill();
__vmcache_l2kill();
local_irq_restore(flags);
mb();
}
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);
}
}