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Commit 7202fb49 authored by Bob Breuer's avatar Bob Breuer Committed by David S. Miller
Browse files

[SPARC]: Setup cpu_possible_map 



Setup cpu_possible_map so the secondary cpus will get started.

Signed-off-by: default avatarBob Breuer <breuerr@mc.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a8cbdcea

arch/sparc/kernel/setup.c

+2 −0
Original line number Diff line number Diff line
@@ -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();

}

arch/sparc/kernel/smp.c

+22 −8
Original line number Diff line number Diff line
@@ -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();

include/asm-sparc/smp.h

+7 −1
Original line number Diff line number Diff line
@@ -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