diff options
Diffstat (limited to 'arch/arm64/include/asm/assembler.h')
| -rw-r--r-- | arch/arm64/include/asm/assembler.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index 04a92307e6c1..49ea3def4bd1 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -530,4 +530,20 @@ alternative_else_nop_endif #endif .endm +/* + * Arrange a physical address in a TTBR register, taking care of 52-bit + * addresses. + * + * phys: physical address, preserved + * ttbr: returns the TTBR value + */ + .macro phys_to_ttbr, phys, ttbr +#ifdef CONFIG_ARM64_PA_BITS_52 + orr \ttbr, \phys, \phys, lsr #46 + and \ttbr, \ttbr, #TTBR_BADDR_MASK_52 +#else + mov \ttbr, \phys +#endif + .endm + #endif /* __ASM_ASSEMBLER_H */ |