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authorRalf Baechle <ralf@linux-mips.org>2007-11-19 15:23:51 +0300
committerRalf Baechle <ralf@linux-mips.org>2008-01-29 13:14:57 +0300
commit87353d8ac39c52784da605ecbe965ecdfad609ad (patch)
treec95ce7cbe9b099c21cab71a195621801b04bc05a /arch/mips/sibyte/bcm1480/smp.c
parent19388fb092d89e179575bd0b44f51b57e175edf5 (diff)
downloadlinux-87353d8ac39c52784da605ecbe965ecdfad609ad.tar.xz
[MIPS] SMP: Call platform methods via ops structure.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/sibyte/bcm1480/smp.c')
-rw-r--r--arch/mips/sibyte/bcm1480/smp.c101
1 files changed, 94 insertions, 7 deletions
diff --git a/arch/mips/sibyte/bcm1480/smp.c b/arch/mips/sibyte/bcm1480/smp.c
index 436ba78359ab..183c460b9ca1 100644
--- a/arch/mips/sibyte/bcm1480/smp.c
+++ b/arch/mips/sibyte/bcm1480/smp.c
@@ -23,6 +23,7 @@
#include <asm/mmu_context.h>
#include <asm/io.h>
+#include <asm/fw/cfe/cfe_api.h>
#include <asm/sibyte/sb1250.h>
#include <asm/sibyte/bcm1480_regs.h>
#include <asm/sibyte/bcm1480_int.h>
@@ -67,28 +68,114 @@ void __cpuinit bcm1480_smp_init(void)
change_c0_status(ST0_IM, imask);
}
-void __cpuinit bcm1480_smp_finish(void)
+/*
+ * These are routines for dealing with the sb1250 smp capabilities
+ * independent of board/firmware
+ */
+
+/*
+ * Simple enough; everything is set up, so just poke the appropriate mailbox
+ * register, and we should be set
+ */
+static void bcm1480_send_ipi_single(int cpu, unsigned int action)
+{
+ __raw_writeq((((u64)action)<< 48), mailbox_0_set_regs[cpu]);
+}
+
+static void bcm1480_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+ unsigned int i;
+
+ for_each_cpu_mask(i, mask)
+ bcm1480_send_ipi_single(i, action);
+}
+
+/*
+ * Code to run on secondary just after probing the CPU
+ */
+static void __cpuinit bcm1480_init_secondary(void)
+{
+ extern void bcm1480_smp_init(void);
+
+ bcm1480_smp_init();
+}
+
+/*
+ * Do any tidying up before marking online and running the idle
+ * loop
+ */
+static void __cpuinit bcm1480_smp_finish(void)
{
extern void sb1480_clockevent_init(void);
sb1480_clockevent_init();
local_irq_enable();
+ bcm1480_smp_finish();
}
/*
- * These are routines for dealing with the sb1250 smp capabilities
- * independent of board/firmware
+ * Final cleanup after all secondaries booted
*/
+static void bcm1480_cpus_done(void)
+{
+}
/*
- * Simple enough; everything is set up, so just poke the appropriate mailbox
- * register, and we should be set
+ * Setup the PC, SP, and GP of a secondary processor and start it
+ * running!
*/
-void core_send_ipi(int cpu, unsigned int action)
+static void __cpuinit bcm1480_boot_secondary(int cpu, struct task_struct *idle)
{
- __raw_writeq((((u64)action)<< 48), mailbox_0_set_regs[cpu]);
+ int retval;
+
+ retval = cfe_cpu_start(cpu_logical_map(cpu), &smp_bootstrap,
+ __KSTK_TOS(idle),
+ (unsigned long)task_thread_info(idle), 0);
+ if (retval != 0)
+ printk("cfe_start_cpu(%i) returned %i\n" , cpu, retval);
}
+/*
+ * Use CFE to find out how many CPUs are available, setting up
+ * phys_cpu_present_map and the logical/physical mappings.
+ * XXXKW will the boot CPU ever not be physical 0?
+ *
+ * Common setup before any secondaries are started
+ */
+static void __init bcm1480_smp_setup(void)
+{
+ int i, num;
+
+ cpus_clear(phys_cpu_present_map);
+ cpu_set(0, phys_cpu_present_map);
+ __cpu_number_map[0] = 0;
+ __cpu_logical_map[0] = 0;
+
+ for (i = 1, num = 0; i < NR_CPUS; i++) {
+ if (cfe_cpu_stop(i) == 0) {
+ cpu_set(i, phys_cpu_present_map);
+ __cpu_number_map[i] = ++num;
+ __cpu_logical_map[num] = i;
+ }
+ }
+ printk(KERN_INFO "Detected %i available secondary CPU(s)\n", num);
+}
+
+static void __init bcm1480_prepare_cpus(unsigned int max_cpus)
+{
+}
+
+struct plat_smp_ops bcm1480_smp_ops = {
+ .send_ipi_single = bcm1480_send_ipi_single,
+ .send_ipi_mask = bcm1480_send_ipi_mask,
+ .init_secondary = bcm1480_init_secondary,
+ .smp_finish = bcm1480_smp_finish,
+ .cpus_done = bcm1480_cpus_done,
+ .boot_secondary = bcm1480_boot_secondary,
+ .smp_setup = bcm1480_smp_setup,
+ .prepare_cpus = bcm1480_prepare_cpus,
+};
+
void bcm1480_mailbox_interrupt(void)
{
int cpu = smp_processor_id();