1 files changed, 117 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/86xx/mpc86xx_smp.c b/arch/powerpc/platforms/86xx/mpc86xx_smp.c
new file mode 100644
index 00000000000..944ec4b7141
--- /dev/null
+++ b/arch/powerpc/platforms/86xx/mpc86xx_smp.c
@@ -0,0 +1,117 @@
+/*
+ * Author: Xianghua Xiao <x.xiao@freescale.com>
+ *         Zhang Wei <wei.zhang@freescale.com>
+ *
+ * Copyright 2006 Freescale Semiconductor Inc.
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/pci-bridge.h>
+#include <asm-powerpc/mpic.h>
+#include <asm/mpc86xx.h>
+#include <asm/cacheflush.h>
+
+#include <sysdev/fsl_soc.h>
+
+#include "mpc86xx.h"
+
+extern void __secondary_start_mpc86xx(void);
+extern unsigned long __secondary_hold_acknowledge;
+
+
+static void __init
+smp_86xx_release_core(int nr)
+{
+        void *mcm_vaddr;
+        unsigned long vaddr, pcr;
+
+        if (nr < 0 || nr >= NR_CPUS)
+                return;
+
+        /*
+         * Startup Core #nr.
+         */
+        mcm_vaddr = ioremap(get_immrbase() + MPC86xx_MCM_OFFSET,
+                            MPC86xx_MCM_SIZE);
+        vaddr = (unsigned long)mcm_vaddr +  MCM_PORT_CONFIG_OFFSET;
+        pcr = in_be32((volatile unsigned *)vaddr);
+        pcr |= 1 << (nr + 24);
+        out_be32((volatile unsigned *)vaddr, pcr);
+}
+
+
+static void __init
+smp_86xx_kick_cpu(int nr)
+{
+        unsigned int save_vector;
+        unsigned long target, flags;
+        int n = 0;
+        volatile unsigned int *vector
+                 = (volatile unsigned int *)(KERNELBASE + 0x100);
+
+        if (nr < 0 || nr >= NR_CPUS)
+                return;
+
+        pr_debug("smp_86xx_kick_cpu: kick CPU #%d\n", nr);
+
+        local_irq_save(flags);
+        local_irq_disable();
+
+        /* Save reset vector */
+        save_vector = *vector;
+
+        /* Setup fake reset vector to call __secondary_start_mpc86xx. */
+        target = (unsigned long) __secondary_start_mpc86xx;
+        create_branch((unsigned long)vector, target, BRANCH_SET_LINK);
+
+        /* Kick that CPU */
+        smp_86xx_release_core(nr);
+
+        /* Wait a bit for the CPU to take the exception. */
+        while ((__secondary_hold_acknowledge != nr) && (n++, n < 1000))
+                mdelay(1);
+
+        /* Restore the exception vector */
+        *vector = save_vector;
+        flush_icache_range((unsigned long) vector, (unsigned long) vector + 4);
+
+        local_irq_restore(flags);
+
+        pr_debug("wait CPU #%d for %d msecs.\n", nr, n);
+}
+
+
+static void __init
+smp_86xx_setup_cpu(int cpu_nr)
+{
+        mpic_setup_this_cpu();
+}
+
+
+struct smp_ops_t smp_86xx_ops = {
+        .message_pass = smp_mpic_message_pass,
+        .probe = smp_mpic_probe,
+        .kick_cpu = smp_86xx_kick_cpu,
+        .setup_cpu = smp_86xx_setup_cpu,
+        .take_timebase = smp_generic_take_timebase,
+        .give_timebase = smp_generic_give_timebase,
+};
+
+
+void __init
+mpc86xx_smp_init(void)
+{
+        smp_ops = &smp_86xx_ops;
+}