diff options
| author | James Morse <james.morse@arm.com> | 2015-12-10 10:22:39 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-12-10 12:08:09 +0000 |
| commit | aa4d5d3cbc258c355151a3903211b27359390ec5 (patch) | |
| tree | abeb7f9963ff7fc4a867f14009f7a11b74cfae2d /arch/arm64/include/asm/assembler.h | |
| parent | 7596abf2e5661d52c4f414f37addeed54e098880 (diff) | |
arm64: Add this_cpu_ptr() assembler macro for use in entry.S
irq_stack is a per_cpu variable, that needs to be access from entry.S.
Use an assembler macro instead of the unreadable details.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/assembler.h')
| -rw-r--r-- | arch/arm64/include/asm/assembler.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index 12eff928ef8b..bb7b72734c24 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -193,6 +193,17 @@ lr .req x30 // link register str \src, [\tmp, :lo12:\sym] .endm + /* + * @sym: The name of the per-cpu variable + * @reg: Result of per_cpu(sym, smp_processor_id()) + * @tmp: scratch register + */ + .macro this_cpu_ptr, sym, reg, tmp + adr_l \reg, \sym + mrs \tmp, tpidr_el1 + add \reg, \reg, \tmp + .endm + /* * Annotate a function as position independent, i.e., safe to be called before * the kernel virtual mapping is activated. |