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| author | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2012-11-08 18:05:56 +0000 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2012-11-19 15:44:33 +0000 |
| commit | cb8cf4f821044f140ea5b9c8d4f816f0c05fab44 (patch) | |
| tree | 11868c21279511f8ce1536e52c42e952342304c5 /arch | |
| parent | 71db5bfec1349afcbfbd71268c01c658c357b4f3 (diff) | |
| download | linux-cb8cf4f821044f140ea5b9c8d4f816f0c05fab44.tar.bz2 | |
ARM: kernel: smp_setup_processor_id() updates
This patch applies some basic changes to the smp_setup_processor_id()
ARM implementation to make the code that builds cpu_logical_map more
uniform across the kernel.
The function now prints the full extent of the boot CPU MPIDR[23:0] and
initializes the cpu_logical_map for CPUs up to nr_cpu_ids.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/kernel/setup.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index da1d1aa20ad9..4515bf6abee0 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -426,13 +426,14 @@ int __cpu_logical_map[NR_CPUS]; void __init smp_setup_processor_id(void) { int i; - u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0; + u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0; + u32 cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); cpu_logical_map(0) = cpu; - for (i = 1; i < NR_CPUS; ++i) + for (i = 1; i < nr_cpu_ids; ++i) cpu_logical_map(i) = i == cpu ? 0 : i; - printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu); + printk(KERN_INFO "Booting Linux on physical CPU 0x%x\n", mpidr); } static void __init setup_processor(void) |