From 87353d8ac39c52784da605ecbe965ecdfad609ad Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 19 Nov 2007 12:23:51 +0000
Subject: [MIPS] SMP: Call platform methods via ops structure.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/sibyte/sb1250/smp.c | 100 +++++++++++++++++++++++++++++++++++++++---
 1 file changed, 93 insertions(+), 7 deletions(-)

(limited to 'arch/mips/sibyte/sb1250')

diff --git a/arch/mips/sibyte/sb1250/smp.c b/arch/mips/sibyte/sb1250/smp.c
index 3f52c95..0734b93 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();
-- 
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