[MIPS] SMP: Call platform methods via ops structure.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 93 insertions, 7 deletions

diff --git a/arch/mips/sibyte/sb1250/smp.c b/arch/mips/sibyte/sb1250/smp.c
index 3f52c95a4eb8..0734b933e969 100644
--- a/arch/mips/sibyte/sb1250/smp.c
+++ b/arch/mips/sibyte/sb1250/smp.c
@@ -24,6 +24,7 @@
 
 #include <asm/mmu_context.h>
 #include <asm/io.h>
+#include <asm/fw/cfe/cfe_api.h>
 #include <asm/sibyte/sb1250.h>
 #include <asm/sibyte/sb1250_regs.h>
 #include <asm/sibyte/sb1250_int.h>
@@ -55,7 +56,43 @@ void __cpuinit sb1250_smp_init(void)
         change_c0_status(ST0_IM, imask);
 }
 
-void __cpuinit sb1250_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 sb1250_send_ipi_single(int cpu, unsigned int action)
+{
+        __raw_writeq((((u64)action) << 48), mailbox_set_regs[cpu]);
+}
+
+static inline void sb1250_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+        unsigned int i;
+
+        for_each_cpu_mask(i, mask)
+                sb1250_send_ipi_single(i, action);
+}
+
+/*
+ * Code to run on secondary just after probing the CPU
+ */
+static void __cpuinit sb1250_init_secondary(void)
+{
+        extern void sb1250_smp_init(void);
+
+        sb1250_smp_init();
+}
+
+/*
+ * Do any tidying up before marking online and running the idle
+ * loop
+ */
+static void __cpuinit sb1250_smp_finish(void)
 {
         extern void sb1250_clockevent_init(void);
 
@@ -64,19 +101,68 @@ void __cpuinit sb1250_smp_finish(void)
 }
 
 /*
- * These are routines for dealing with the sb1250 smp capabilities
- * independent of board/firmware
+ * Final cleanup after all secondaries booted
  */
+static void sb1250_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 sb1250_boot_secondary(int cpu, struct task_struct *idle)
 {
-        __raw_writeq((((u64)action) << 48), mailbox_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 sb1250_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 sb1250_prepare_cpus(unsigned int max_cpus)
+{
+}
+
+struct plat_smp_ops sb_smp_ops = {
+        .send_ipi_single        = sb1250_send_ipi_single,
+        .send_ipi_mask          = sb1250_send_ipi_mask,
+        .init_secondary         = sb1250_init_secondary,
+        .smp_finish             = sb1250_smp_finish,
+        .cpus_done              = sb1250_cpus_done,
+        .boot_secondary         = sb1250_boot_secondary,
+        .smp_setup              = sb1250_smp_setup,
+        .prepare_cpus           = sb1250_prepare_cpus,
+};
+
 void sb1250_mailbox_interrupt(void)
 {
         int cpu = smp_processor_id();