From cfa460adfdefcc30d104e1a9ee44994ee349bb7b Mon Sep 17 00:00:00 2001 From: William Juul Date: Wed, 31 Oct 2007 13:53:06 +0100 Subject: Update MTD to that of Linux 2.6.22.1 A lot changed in the Linux MTD code, since it was last ported from Linux to U-Boot. This patch takes U-Boot NAND support to the level of Linux 2.6.22.1 and will enable support for very large NAND devices (4KB pages) and ease the compatibility between U-Boot and Linux filesystems. This patch is tested on two custom boards with PPC and ARM processors running YAFFS in U-Boot and Linux using gcc-4.1.2 cross compilers. MAKEALL ppc/arm has some issues: * DOC/OneNand/nand_spl is not building (I have not tried porting these parts, and since I do not have any HW and I am not familiar with this code/HW I think its best left to someone else.) Except for the issues mentioned above, I have ported all drivers necessary to run MAKEALL ppc/arm without errors and warnings. Many drivers were trivial to port, but some were not so trivial. The following drivers must be examined carefully and maybe rewritten to some degree: cpu/ppc4xx/ndfc.c cpu/arm926ejs/davinci/nand.c board/delta/nand.c board/zylonite/nand.c Signed-off-by: William Juul Signed-off-by: Stig Olsen Signed-off-by: Scott Wood --- include/linux/err.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 include/linux/err.h (limited to 'include/linux/err.h') diff --git a/include/linux/err.h b/include/linux/err.h new file mode 100644 index 0000000..4e08c4f --- /dev/null +++ b/include/linux/err.h @@ -0,0 +1,45 @@ +#ifndef _LINUX_ERR_H +#define _LINUX_ERR_H + +/* XXX U-BOOT XXX */ +#if 0 +#include +#else +#include +#endif + +#include + + +/* + * Kernel pointers have redundant information, so we can use a + * scheme where we can return either an error code or a dentry + * pointer with the same return value. + * + * This should be a per-architecture thing, to allow different + * error and pointer decisions. + */ +#define MAX_ERRNO 4095 + +#ifndef __ASSEMBLY__ + +#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO) + +static inline void *ERR_PTR(long error) +{ + return (void *) error; +} + +static inline long PTR_ERR(const void *ptr) +{ + return (long) ptr; +} + +static inline long IS_ERR(const void *ptr) +{ + return IS_ERR_VALUE((unsigned long)ptr); +} + +#endif + +#endif /* _LINUX_ERR_H */ -- cgit v1.1