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powerpc/mp: add support for discontiguous cores

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Some SOCs have discontiguously-numbered cores, and so we can't determine the
valid core numbers via the FRR register any more.  We define
CPU_TYPE_ENTRY_MASK to specify a discontiguous core mask, and helper functions
to process the mask and enumerate over the set of valid cores.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Timur Tabi 2011-08-05 16:15:24 -05:00 • committed by Kumar Gala
parent 86df5142a1
commit fbb9ecf749
8 changed files with 78 additions and 29 deletions
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15
include/common.h
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@ -485,7 +485,22 @@ void ddr_enable_ecc(unsigned int dram_size);
#endif
/* $(CPU)/cpu.c */
static inline int cpumask_next(int cpu, unsigned int mask)
{
for (cpu++; !((1 << cpu) & mask); cpu++)
;
return cpu;
}
#define for_each_cpu(iter, cpu, num_cpus, mask) \
for (iter = 0, cpu = cpumask_next(-1, mask); \
iter < num_cpus; \
iter++, cpu = cpumask_next(cpu, mask)) \
int cpu_numcores (void);
u32 cpu_mask (void);
int is_core_valid (unsigned int);
int probecpu (void);
int checkcpu (void);
int checkicache (void);