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| author | Ben Dooks <ben.dooks@codethink.co.uk> | 2013-02-01 10:31:13 +0000 |
|---|---|---|
| committer | Ben Dooks <ben.dooks@codethink.co.uk> | 2013-08-30 20:12:49 +0100 |
| commit | b2c1d314527378a6fa29cc05d2cd5659fa99c6a1 (patch) | |
| tree | 047e7c2b526c68d6d9412639986fb37b3e71650e | |
| parent | b2c187cba13882e8f212d5fe99ecbd384354d200 (diff) | |
| download | linux-b2c1d314527378a6fa29cc05d2cd5659fa99c6a1.tar.gz | |
ARM: add atag32_to_cpu() function
Add atag32_to_cpu() function to allow code manipulating ATAGs to deal
with the case where the boot-loader was in little-endian and Linux is
running big-endian.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
| -rw-r--r-- | arch/arm/include/uapi/asm/setup.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/arm/include/uapi/asm/setup.h b/arch/arm/include/uapi/asm/setup.h index 979ff4016404..d3b3fa146e2b 100644 --- a/arch/arm/include/uapi/asm/setup.h +++ b/arch/arm/include/uapi/asm/setup.h @@ -175,13 +175,20 @@ struct tagtable { #define tag_member_present(tag,member) \ ((unsigned long)(&((struct tag *)0L)->member + 1) \ - <= (tag)->hdr.size * 4) + <= atag32_to_cpu((tag)->hdr.size) * 4) -#define tag_next(t) ((struct tag *)((__u32 *)(t) + (t)->hdr.size)) +#define tag_next(t) ((struct tag *)((__u32 *)(t) + atag32_to_cpu((t)->hdr.size))) #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) #define for_each_tag(t,base) \ for (t = base; t->hdr.size; t = tag_next(t)) +#ifdef CONFIG_CPU_BE8_BOOT_LE +#define atag32_to_cpu(x) le32_to_cpu(x) +#define cpu_to_atag32(x) cpu_to_le32(x) +#else +#define cpu_to_atag32(x) x +#define atag32_to_cpu(x) x +#endif #endif /* _UAPI__ASMARM_SETUP_H */ |