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[SPARC]: Setup cpu_possible_map

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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>
This commit is contained in:
Bob Breuer 2006-06-20 00:30:31 -07:00 committed by David S. Miller
parent a8cbdcea34
commit 7202fb496a
3 changed files with 31 additions and 9 deletions
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2
arch/sparc/kernel/setup.c
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@ -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();
}

30
arch/sparc/kernel/smp.c
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@ -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();

8
include/asm-sparc/smp.h
View File

@ -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