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| author | Paul Mackerras <paulus@samba.org> | 2006-09-19 14:06:27 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-09-20 15:09:48 +1000 |
| commit | a4dc7ff08915a2035aa6d6decc53fa1deaa410bb (patch) | |
| tree | 9b28af3a21f915e3fe8ed7ee163be1b1d2bfe8b0 /include/asm-powerpc | |
| parent | 19e59df4dc2e6f7b46190ee77ce7093769f597a7 (diff) | |
| download | linux-a4dc7ff08915a2035aa6d6decc53fa1deaa410bb.tar.bz2 | |
[POWERPC] Define of_read_ulong helper
There are various places where we want to extract an unsigned long
value from a device-tree property that can be 1 or 2 cells in length.
This replaces some open-coded calculations, and one place where we
assumed without checking that properties were the length we wanted,
with a little of_read_ulong() helper.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/prom.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h index c15e66a2e681..524629769336 100644 --- a/include/asm-powerpc/prom.h +++ b/include/asm-powerpc/prom.h @@ -197,7 +197,7 @@ extern int release_OF_resource(struct device_node* node, int index); */ -/* Helper to read a big number */ +/* Helper to read a big number; size is in cells (not bytes) */ static inline u64 of_read_number(const u32 *cell, int size) { u64 r = 0; @@ -206,6 +206,16 @@ static inline u64 of_read_number(const u32 *cell, int size) return r; } +/* Like of_read_number, but we want an unsigned long result */ +#ifdef CONFIG_PPC32 +static inline unsigned long of_read_ulong(const u32 *cell, int size) +{ + return cell[size-1]; +} +#else +#define of_read_ulong(cell, size) of_read_number(cell, size) +#endif + /* Translate an OF address block into a CPU physical address */ #define OF_BAD_ADDR ((u64)-1) |