linux/arch/hexagon/mm/cache.c
Guenter Roeck cb84c2b401 hexagon: Fix build failures in linux-next
hexagon:defconfig fails to build in linux-next since commit 332fd7c4fe
("genirq: Generic chip: Change irq_reg_{readl,writel} arguments").

The primary build failure is

arch/hexagon/include/asm/cacheflush.h: In function 'copy_to_user_page':
arch/hexagon/include/asm/cacheflush.h:89:22: error: 'VM_EXEC' undeclared

This is the result of including of <linux/io.h> from <linux/irq.h>,
which is now necessary due to the use of readl and writel from irq.h.
This causes recursive inclusions in hexagon code; cacheflush.h is included
from mm.h prior to the definition of VM_EXEC.

Fix the problem by moving copy_to_user_page from the hexagon include file to
arch/hexagon/mm/cache.c, similar to other architectures. After this change,
several redefinitions of readl and writel are reported. Those are caused
by recursive inclusions of io.h and asm/cacheflush.h. Fix those problems by
reducing the number of files included from those files. Also, it was necessary
to stop including asm-generic/cacheflush.h from asm/cacheflush.h. Instead,
functionality originally provided by asm-generic/cacheflush.h is now coded
in asm/cacheflush.h directly.

Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
signed-off-by: Richard Kuo <rkuo@codeaurora.org>
2014-12-16 13:27:12 -06:00

140 lines
3.0 KiB
C

/*
* Cache management functions for Hexagon
*
* Copyright (c) 2010-2011, The Linux Foundation. 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 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.
*/
#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);
}
}