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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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6
arch/powerpc/include/asm/processor.h
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@@ -1176,13 +1176,17 @@ struct cpu_type {
char name[15];
u32 soc_ver;
u32 num_cores;
u32 mask; /* which cpu(s) actually exist */
};
struct cpu_type *identify_cpu(u32 ver);
#if defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
#define CPU_TYPE_ENTRY(n, v, nc) \
{ .name = #n, .soc_ver = SVR_##v, .num_cores = (nc), }
{ .name = #n, .soc_ver = SVR_##v, .num_cores = (nc), \
.mask = (1 << (nc)) - 1 }
#define CPU_TYPE_ENTRY_MASK(n, v, nc, m) \
{ .name = #n, .soc_ver = SVR_##v, .num_cores = (nc), .mask = (m) }
#else
#if defined(CONFIG_MPC83xx)
#define CPU_TYPE_ENTRY(x) {#x, SPR_##x}