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arc: add stubs for map_physmem() and unmap_physmem()

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Up until now there was no need in those stubs.

But since following commit compilation of U-Boot on ARC is broken:
------------------------>8----------------------
commit 7861204c9a
Author: Stephen Warren <swarren@wwwdotorg.org>
Date:   Sat Oct 3 13:56:46 2015 -0600

    itest: make memory access work under sandbox

    itest accesses memory, and hence must map/unmap it. Without doing so, it
    accesses invalid addresses and crashes.

    Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
    Reviewed-by: Simon Glass <sjg@chromium.org>
------------------------>8----------------------

That's because CMD_ITEST is enabled by default in common/Kconfig and now
map_physmem()/unmap_physmem() is used there.

So this patch adds missing stubs for ARC.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
This commit is contained in:
Alexey Brodkin 2015-11-10 11:13:42 +03:00
parent 3d4825446e
commit 90841dc21e
1 changed files with 24 additions and 0 deletions
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24
arch/arc/include/asm/io.h
View file

@ -10,6 +10,30 @@
#include <linux/types.h> #include <linux/types.h>
#include <asm/byteorder.h> #include <asm/byteorder.h>
/*
* Given a physical address and a length, return a virtual address
* that can be used to access the memory range with the caching
* properties specified by "flags".
*/
#define MAP_NOCACHE (0)
#define MAP_WRCOMBINE (0)
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
return (void *)((unsigned long)paddr);
}
/*
* Take down a mapping set up by map_physmem().
*/
static inline void unmap_physmem(void *vaddr, unsigned long flags)
{
}
static inline void sync(void) static inline void sync(void)
{ {
/* Not yet implemented */ /* Not yet implemented */