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| author |   Russell King <rmk+kernel@arm.linux.org.uk> | 2010-09-04 16:14:20 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-04 20:20:45 +0100 |
| commit | 067173526c3bbc2eaeefcf6b7b2a9d998b9e8042 (patch) | |
| tree | 4da794388079afaf0f43a5aadb750e097846e538 /arch/arm/include | |
| parent | ARM: Simplify SMP/SCU/TWD dependencies (diff) | |
| download | linux-dev-067173526c3bbc2eaeefcf6b7b2a9d998b9e8042.tar.xz linux-dev-067173526c3bbc2eaeefcf6b7b2a9d998b9e8042.zip | |
ARM: Provide common header for hard_smp_processor_id()
Provide a common header to read the SMP CPU number from the MPIDR.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/smp_mpidr.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/include/asm/smp_mpidr.h b/arch/arm/include/asm/smp_mpidr.h new file mode 100644 index 000000000000..7da7105e83e5 --- /dev/null +++ b/arch/arm/include/asm/smp_mpidr.h @@ -0,0 +1,12 @@ +#ifndef ASMARM_SMP_MIDR_H +#define ASMARM_SMP_MIDR_H + +#define hard_smp_processor_id() \ + ({ \ + unsigned int cpunum; \ + __asm__("mrc p15, 0, %0, c0, c0, 5\n" \ + : "=r" (cpunum)); \ + cpunum &= 0x0F; \ + }) + +#endif |