diff options
Diffstat (limited to 'include/lib/smccc.h')
| -rw-r--r-- | include/lib/smccc.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/lib/smccc.h b/include/lib/smccc.h index cb722b0e..a07e510b 100644 --- a/include/lib/smccc.h +++ b/include/lib/smccc.h @@ -84,5 +84,32 @@ { _n0, _n1, _n2, _n3, _n4, _n5 } \ } +/* + * Return a UUID in the SMC return registers. + * + * Acccording to section 5.3 of the SMCCC, UUIDs are returned as a single + * 128-bit value using the SMC32 calling convention. This value is mapped to + * argument registers x0-x3 on AArch64 (resp. r0-r3 on AArch32). x0 for example + * shall hold bytes 0 to 3, with byte 0 in the low-order bits. + */ +static inline uint32_t smc_uuid_word(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3) +{ + return ((uint32_t) b0) | (((uint32_t) b1) << 8) | + (((uint32_t) b2) << 16) | (((uint32_t) b3) << 24); +} + +#define SMC_UUID_RET(_h, _uuid) \ + SMC_RET4(handle, \ + smc_uuid_word((_uuid).time_low[0], (_uuid).time_low[1], \ + (_uuid).time_low[2], (_uuid).time_low[3]), \ + smc_uuid_word((_uuid).time_mid[0], (_uuid).time_mid[1], \ + (_uuid).time_hi_and_version[0], \ + (_uuid).time_hi_and_version[1]), \ + smc_uuid_word((_uuid).clock_seq_hi_and_reserved, \ + (_uuid).clock_seq_low, (_uuid).node[0], \ + (_uuid).node[1]), \ + smc_uuid_word((_uuid).node[2], (_uuid).node[3], \ + (_uuid).node[4], (_uuid).node[5])) + #endif /*__ASSEMBLY__*/ #endif /* __SMCCC_H__ */ |