diff options
| author | Bob Breuer <breuerr@mc.net> | 2006-06-20 00:30:31 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-06-20 00:30:31 -0700 |
| commit | 7202fb496af235506a3c6fea836fe4c9957f730e (patch) | |
| tree | 44e5338a62fe866da0f9bac2f9bfb75226e4ca32 | |
| parent | a8cbdcea341ac2f404ee81aa1c19d54aaa0416b4 (diff) | |
| download | linux-7202fb496af235506a3c6fea836fe4c9957f730e.tar.bz2 | |
[SPARC]: Setup cpu_possible_map
Setup cpu_possible_map so the secondary cpus will get started.
Signed-off-by: Bob Breuer <breuerr@mc.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/smp.c | 30 | ||||
| -rw-r--r-- | include/asm-sparc/smp.h | 8 |
3 files changed, 31 insertions, 9 deletions
diff --git a/arch/sparc/kernel/setup.c b/arch/sparc/kernel/setup.c index 8531a8e15832..2cbf282f0d00 100644 --- a/arch/sparc/kernel/setup.c +++ b/arch/sparc/kernel/setup.c @@ -349,6 +349,8 @@ void __init setup_arch(char **cmdline_p) init_mm.context = (unsigned long) NO_CONTEXT; init_task.thread.kregs = &fake_swapper_regs; + smp_setup_cpu_possible_map(); + paging_init(); } diff --git a/arch/sparc/kernel/smp.c b/arch/sparc/kernel/smp.c index 40b42c88e6a7..d0ccb8ad1d54 100644 --- a/arch/sparc/kernel/smp.c +++ b/arch/sparc/kernel/smp.c @@ -267,22 +267,18 @@ int setup_profiling_timer(unsigned int multiplier) void __init smp_prepare_cpus(unsigned int max_cpus) { extern void smp4m_boot_cpus(void); - int i, cpuid, ncpus, extra; + int i, cpuid, extra; BUG_ON(sparc_cpu_model != sun4m); printk("Entering SMP Mode...\n"); - ncpus = 1; extra = 0; for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) { - if (cpuid == boot_cpu_id) - continue; - if (cpuid < NR_CPUS && ncpus++ < max_cpus) - cpu_set(cpuid, phys_cpu_present_map); - else + if (cpuid >= NR_CPUS) extra++; } - if (max_cpus >= NR_CPUS && extra) + /* i = number of cpus */ + if (extra && max_cpus > i - extra) printk("Warning: NR_CPUS is too low to start all cpus\n"); smp_store_cpu_info(boot_cpu_id); @@ -290,6 +286,24 @@ void __init smp_prepare_cpus(unsigned int max_cpus) smp4m_boot_cpus(); } +/* Set this up early so that things like the scheduler can init + * properly. We use the same cpu mask for both the present and + * possible cpu map. + */ +void __init smp_setup_cpu_possible_map(void) +{ + int instance, mid; + + instance = 0; + while (!cpu_find_by_instance(instance, NULL, &mid)) { + if (mid < NR_CPUS) { + cpu_set(mid, phys_cpu_present_map); + cpu_set(mid, cpu_present_map); + } + instance++; + } +} + void __devinit smp_prepare_boot_cpu(void) { int cpuid = hard_smp_processor_id(); diff --git a/include/asm-sparc/smp.h b/include/asm-sparc/smp.h index 98c46e3fbe8a..c1a289327a79 100644 --- a/include/asm-sparc/smp.h +++ b/include/asm-sparc/smp.h @@ -146,6 +146,8 @@ static inline int hard_smp_processor_id(void) #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier #define prof_counter(__cpu) cpu_data(__cpu).counter +void smp_setup_cpu_possible_map(void); + #endif /* !(__ASSEMBLY__) */ /* Sparc specific messages. */ @@ -162,7 +164,11 @@ static inline int hard_smp_processor_id(void) #define MBOX_IDLECPU2 0xFD #define MBOX_STOPCPU2 0xFE -#endif /* SMP */ +#else /* SMP */ + +#define smp_setup_cpu_possible_map() do { } while (0) + +#endif /* !(SMP) */ #define NO_PROC_ID 0xFF |