diff options
Diffstat (limited to 'payloads/libpayload/include/arm/arch/cache.h')
| -rw-r--r-- | payloads/libpayload/include/arm/arch/cache.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/payloads/libpayload/include/arm/arch/cache.h b/payloads/libpayload/include/arm/arch/cache.h index 470eb55108..647ec42ca2 100644 --- a/payloads/libpayload/include/arm/arch/cache.h +++ b/payloads/libpayload/include/arm/arch/cache.h @@ -117,6 +117,15 @@ static inline void write_ttbr0(uint32_t val) asm volatile ("mcr p15, 0, %0, c2, c0, 0" : : "r" (val) : "memory"); } +/* read translation table base register 0 (TTBR0) */ +static inline uint64_t read_ttbr0(void) +{ + uint32_t low, high; + asm volatile ("mrrc p15, 0, %[low], %[high], c2" : + [low] "=r" (low), [high] "=r" (high)); + return ((uint64_t)high << 32) | low; +} + /* read translation table base control register (TTBCR) */ static inline uint32_t read_ttbcr(void) { |