diff options
| author | James Morse <james.morse@arm.com> | 2015-12-10 10:22:39 +0000 |
|---|---|---|
| committer | Jeffrey Vander Stoep <jeffv@google.com> | 2016-09-16 21:32:58 +0000 |
| commit | 722e6114950d4dfdf890c045461932c91a4209d7 (patch) | |
| tree | 67cefe8af99a6d8c411e799bf8ee010467d6676f /arch/arm64/include/asm/assembler.h | |
| parent | b485dccd9eee43b0739198f53459c6a0088e93a5 (diff) | |
UPSTREAM: 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>
Bug: 30369029
Patchset: per-cpu-irq-stack
(cherry picked from commit aa4d5d3cbc258c355151a3903211b27359390ec5)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I2ccc11f442c0303c62e1c3e0a05a088958c922b8
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. |