From 4213fc2913722045eb2c327a64b99e3e3178aa5c Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 24 Feb 2013 17:33:14 +0000 Subject: sandbox: Add un/map_sysmen() to deal with sandbox's ram_buf Sandbox doesn't actually provide U-Boot access to the machine's physical memory. Instead it provides a RAM buffer of configurable size, and all memory accesses are within that buffer. Sandbox memory starts at 0 and is CONFIG_DRAM_SIZE bytes in size. Allowing access outside this buffer might produce unpredictable results in the event of an error, and would expose the host machine's memory architecture to the sandbox U-Boot. Most U-Boot functions assume that they can just access memory at given address. For sandbox this is not true. Add a map_sysmem() call which converts a U-Boot address to a system address. In most cases this is a NOP, but for sandbox it returns a pointer to that memory inside the RAM buffer. To get a U-Boot feature to work correctly within sandbox, you should call map_sysmem() to get a pointer to the address, and then use that address for any U-Boot memory accesses. Signed-off-by: Simon Glass --- include/common.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include/common.h') diff --git a/include/common.h b/include/common.h index 170f4391a67..1d0728f847d 100644 --- a/include/common.h +++ b/include/common.h @@ -870,6 +870,18 @@ int cpu_disable(int nr); int cpu_release(int nr, int argc, char * const argv[]); #endif +/* Define a null map_sysmem() if the architecture doesn't use it */ +# ifndef CONFIG_ARCH_MAP_SYSMEM +static inline void *map_sysmem(phys_addr_t paddr, unsigned long len) +{ + return (void *)(uintptr_t)paddr; +} + +static inline void unmap_sysmem(const void *vaddr) +{ +} +# endif + #endif /* __ASSEMBLY__ */ #ifdef CONFIG_PPC -- cgit v1.2.3