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| author | Yann Gautier <yann.gautier@st.com> | 2018-06-14 18:35:33 +0200 |
|---|---|---|
| committer | Yann Gautier <yann.gautier@st.com> | 2018-06-14 18:35:33 +0200 |
| commit | 39676357af8318b7ec624f8a26bcc7ea0fbc7040 (patch) | |
| tree | a09c5775ab61614dba2402eaadca9f3ad06658c6 /include | |
| parent | 1ebdbe79c7c04d62e870eadedd615bd2dcebe8bf (diff) | |
| download | platform_external_arm-trusted-firmware-39676357af8318b7ec624f8a26bcc7ea0fbc7040.tar.gz platform_external_arm-trusted-firmware-39676357af8318b7ec624f8a26bcc7ea0fbc7040.tar.bz2 platform_external_arm-trusted-firmware-39676357af8318b7ec624f8a26bcc7ea0fbc7040.zip | |
Add GENMASK macros
Import GENMASK_32 and GENMASK_64 macros from optee-os (permissive license).
And default GENMASK is set to GENMASK_32 for AARCH32,
and to GENMASK_64 for 64bit arch.
fixes arm-software/tf-issues#596
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/lib/utils_def.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/lib/utils_def.h b/include/lib/utils_def.h index 31b129454..2975103f5 100644 --- a/include/lib/utils_def.h +++ b/include/lib/utils_def.h @@ -19,6 +19,23 @@ #define BIT(nr) (ULL(1) << (nr)) /* + * Create a contiguous bitmask starting at bit position @l and ending at + * position @h. For example + * GENMASK_64(39, 21) gives us the 64bit vector 0x000000ffffe00000. + */ +#define GENMASK_32(h, l) \ + (((~UINT32_C(0)) << (l)) & (~UINT32_C(0) >> (32 - 1 - (h)))) + +#define GENMASK_64(h, l) \ + (((~UINT64_C(0)) << (l)) & (~UINT64_C(0) >> (64 - 1 - (h)))) + +#ifdef AARCH32 +#define GENMASK GENMASK_32 +#else +#define GENMASK GENMASK_64 +#endif + +/* * This variant of div_round_up can be used in macro definition but should not * be used in C code as the `div` parameter is evaluated twice. */ |