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powerpc/85xx: Update smp support to handle doorbells and non-mpic init

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Use device tree to determine if we actually have an MPIC and use
CPU feature to decide if we should use doorbells for IPIs.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2009-02-11 22:50:42 -06:00
parent 1a3d1fc227
commit 563fdd4a0a
1 changed files with 35 additions and 8 deletions
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43
arch/powerpc/platforms/85xx/smp.c
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@ -21,6 +21,7 @@
#include <asm/page.h>
#include <asm/mpic.h>
#include <asm/cacheflush.h>
#include <asm/dbell.h>
#include <sysdev/fsl_soc.h>
@ -80,10 +81,8 @@ smp_85xx_kick_cpu(int nr)
}
static void __init
smp_85xx_setup_cpu(int cpu_nr)
smp_85xx_basic_setup(int cpu_nr)
{
mpic_setup_this_cpu();
/* Clear any pending timer interrupts */
mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
@ -91,15 +90,43 @@ smp_85xx_setup_cpu(int cpu_nr)
mtspr(SPRN_TCR, TCR_DIE);
}
static void __init
smp_85xx_setup_cpu(int cpu_nr)
{
mpic_setup_this_cpu();
smp_85xx_basic_setup(cpu_nr);
}
struct smp_ops_t smp_85xx_ops = {
.message_pass = smp_mpic_message_pass,
.probe = smp_mpic_probe,
.kick_cpu = smp_85xx_kick_cpu,
.setup_cpu = smp_85xx_setup_cpu,
};
void __init
mpc85xx_smp_init(void)
static int __init smp_dummy_probe(void)
{
return NR_CPUS;
}
void __init mpc85xx_smp_init(void)
{
struct device_node *np;
smp_85xx_ops.message_pass = NULL;
np = of_find_node_by_type(NULL, "open-pic");
if (np) {
smp_85xx_ops.probe = smp_mpic_probe;
smp_85xx_ops.setup_cpu = smp_85xx_setup_cpu;
smp_85xx_ops.message_pass = smp_mpic_message_pass;
} else {
smp_85xx_ops.probe = smp_dummy_probe;
smp_85xx_ops.setup_cpu = smp_85xx_basic_setup;
}
if (cpu_has_feature(CPU_FTR_DBELL))
smp_85xx_ops.message_pass = smp_dbell_message_pass;
BUG_ON(!smp_85xx_ops.message_pass);
smp_ops = &smp_85xx_ops;
}