diff options
| -rw-r--r-- | arch/arc/include/asm/smp.h | 4 | ||||
| -rw-r--r-- | arch/arc/kernel/setup.c | 3 | ||||
| -rw-r--r-- | arch/arc/kernel/smp.c | 12 |
3 files changed, 16 insertions, 3 deletions
diff --git a/arch/arc/include/asm/smp.h b/arch/arc/include/asm/smp.h index 3845b9e94f69..5ea4cf8cd1a8 100644 --- a/arch/arc/include/asm/smp.h +++ b/arch/arc/include/asm/smp.h @@ -45,12 +45,16 @@ extern int smp_ipi_irq_setup(int cpu, int irq); * struct plat_smp_ops - SMP callbacks provided by platform to ARC SMP * * @info: SoC SMP specific info for /proc/cpuinfo etc + * @init_early_smp: A SMP specific h/w block can init itself + * Could be common across platforms so not covered by + * mach_desc->init_early() * @cpu_kick: For Master to kickstart a cpu (optionally at a PC) * @ipi_send: To send IPI to a @cpu * @ips_clear: To clear IPI received at @irq */ struct plat_smp_ops { const char *info; + void (*init_early_smp)(void); void (*cpu_kick)(int cpu, unsigned long pc); void (*ipi_send)(int cpu); void (*ipi_clear)(int irq); diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index 68d3e181a82f..c33e77c0ad3e 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -411,8 +411,9 @@ void __init setup_arch(char **cmdline_p) if (machine_desc->init_early) machine_desc->init_early(); - setup_processor(); smp_init_cpus(); + + setup_processor(); setup_arch_memory(); /* copy flat DT out of .init and then unflatten it */ diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c index f6175fc5f2bb..a59a53f98877 100644 --- a/arch/arc/kernel/smp.c +++ b/arch/arc/kernel/smp.c @@ -42,8 +42,13 @@ void __init smp_prepare_boot_cpu(void) } /* - * Initialise the CPU possible map early - this describes the CPUs - * which may be present or become present in the system. + * Called from setup_arch() before calling setup_processor() + * + * - Initialise the CPU possible map early - this describes the CPUs + * which may be present or become present in the system. + * - Call early smp init hook. This can initialize a specific multi-core + * IP which is say common to several platforms (hence not part of + * platform specific int_early() hook) */ void __init smp_init_cpus(void) { @@ -51,6 +56,9 @@ void __init smp_init_cpus(void) for (i = 0; i < NR_CPUS; i++) set_cpu_possible(i, true); + + if (plat_smp_ops.init_early_smp) + plat_smp_ops.init_early_smp(); } /* called from init ( ) => process 1 */ |