This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / platforms / 86xx / mpc86xx_smp.c

diff --git a/arch/powerpc/platforms/86xx/mpc86xx_smp.c b/arch/powerpc/platforms/86xx/mpc86xx_smp.c
new file mode 100644 (file)
index 0000000..bb7fb41
--- /dev/null
+++ b/arch/powerpc/platforms/86xx/mpc86xx_smp.c
@@ -0,0 +1,115 @@
+/*
+ * 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/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)
+{
+       __be32 __iomem *mcm_vaddr;
+       unsigned long pcr;
+
+       if (nr < 0 || nr >= NR_CPUS)
+               return;
+
+       /*
+        * Startup Core #nr.
+        */
+       mcm_vaddr = ioremap(get_immrbase() + MPC86xx_MCM_OFFSET,
+                           MPC86xx_MCM_SIZE);
+       pcr = in_be32(mcm_vaddr + (MCM_PORT_CONFIG_OFFSET >> 2));
+       pcr |= 1 << (nr + 24);
+       out_be32(mcm_vaddr + (MCM_PORT_CONFIG_OFFSET >> 2), 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;
+}