forked from Minki/linux
cb84c2b401
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>
102 lines
3.8 KiB
C
102 lines
3.8 KiB
C
/*
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* Cache flush operations for the Hexagon architecture
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*
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* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#ifndef _ASM_CACHEFLUSH_H
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#define _ASM_CACHEFLUSH_H
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#include <linux/mm_types.h>
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/* Cache flushing:
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*
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* - flush_cache_all() flushes entire cache
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* - flush_cache_mm(mm) flushes the specified mm context's cache lines
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* - flush_cache_page(mm, vmaddr, pfn) flushes a single page
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* - flush_cache_range(vma, start, end) flushes a range of pages
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* - flush_icache_range(start, end) flush a range of instructions
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* - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
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* - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
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*
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* Need to doublecheck which one is really needed for ptrace stuff to work.
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*/
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#define LINESIZE 32
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#define LINEBITS 5
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#define flush_cache_all() do { } while (0)
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#define flush_cache_mm(mm) do { } while (0)
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#define flush_cache_dup_mm(mm) do { } while (0)
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#define flush_cache_range(vma, start, end) do { } while (0)
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#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
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#define flush_dcache_page(page) do { } while (0)
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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#define flush_icache_page(vma, pg) do { } while (0)
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#define flush_icache_user_range(vma, pg, adr, len) do { } while (0)
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#define flush_cache_vmap(start, end) do { } while (0)
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#define flush_cache_vunmap(start, end) do { } while (0)
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/*
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* Flush Dcache range through current map.
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*/
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extern void flush_dcache_range(unsigned long start, unsigned long end);
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/*
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* Flush Icache range through current map.
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*/
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extern void flush_icache_range(unsigned long start, unsigned long end);
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/*
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* Memory-management related flushes are there to ensure in non-physically
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* indexed cache schemes that stale lines belonging to a given ASID aren't
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* in the cache to confuse things. The prototype Hexagon Virtual Machine
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* only uses a single ASID for all user-mode maps, which should
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* mean that they aren't necessary. A brute-force, flush-everything
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* implementation, with the name xxxxx_hexagon() is present in
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* arch/hexagon/mm/cache.c, but let's not wire it up until we know
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* it is needed.
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*/
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extern void flush_cache_all_hexagon(void);
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/*
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* This may or may not ever have to be non-null, depending on the
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* virtual machine MMU. For a native kernel, it's definitiely a no-op
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*
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* This is also the place where deferred cache coherency stuff seems
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* to happen, classically... but instead we do it like ia64 and
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* clean the cache when the PTE is set.
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*
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*/
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static inline void update_mmu_cache(struct vm_area_struct *vma,
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unsigned long address, pte_t *ptep)
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{
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/* generic_ptrace_pokedata doesn't wind up here, does it? */
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}
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void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long vaddr, void *dst, void *src, int len);
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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memcpy(dst, src, len)
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extern void hexagon_inv_dcache_range(unsigned long start, unsigned long end);
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extern void hexagon_clean_dcache_range(unsigned long start, unsigned long end);
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#endif
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