From 90841dc21ed077a045c20dba660da8235a4fa577 Mon Sep 17 00:00:00 2001 From: Alexey Brodkin Date: Tue, 10 Nov 2015 11:13:42 +0300 Subject: [PATCH 1/1] arc: add stubs for map_physmem() and unmap_physmem() Up until now there was no need in those stubs. But since following commit compilation of U-Boot on ARC is broken: ------------------------>8---------------------- commit 7861204c9af7fec1ea9b41541c272516235a6c93 Author: Stephen Warren 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 Reviewed-by: Simon Glass ------------------------>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 Reviewed-by: Simon Glass Cc: Stephen Warren --- arch/arc/include/asm/io.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h index 24b7337308..281682c8b4 100644 --- a/arch/arc/include/asm/io.h +++ b/arch/arc/include/asm/io.h @@ -10,6 +10,30 @@ #include #include +/* + * 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) { /* Not yet implemented */ -- 2.39.2