powerpc/mpc85xx: refactor the PM operations

Freescale CoreNet-based and Non-CoreNet-based platforms require
different PM operations. This patch extracted existing PM operations
on Non-CoreNet-based platforms to a new file which can accommodate
both platforms. In this way, PM operation codes are clearer structurally.

Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com>
Signed-off-by: Tang Yuantian <Yuantian.Tang@feescale.com>
Signed-off-by: Scott Wood <oss@buserror.net>

diff --git a/arch/powerpc/platforms/85xx/Makefile b/arch/powerpc/platforms/85xx/Makefile
index 1fe7fb95175a50ebec0576fac897ae077f7b5a8e..7bc86dae9517654cc14a379c6022f56b05f00f9f 100644 (file)
--- a/arch/powerpc/platforms/85xx/Makefile
+++ b/arch/powerpc/platforms/85xx/Makefile
@@ -2,6 +2,7 @@
 # Makefile for the PowerPC 85xx linux kernel.
 #
 obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_FSL_PMC)            += mpc85xx_pm_ops.o
 
 obj-y += common.o
 

diff --git a/arch/powerpc/platforms/85xx/mpc85xx_pm_ops.c b/arch/powerpc/platforms/85xx/mpc85xx_pm_ops.c
new file mode 100644 (file)
index 0000000..f05325f
--- /dev/null
+++ b/arch/powerpc/platforms/85xx/mpc85xx_pm_ops.c
@@ -0,0 +1,106 @@
+/*
+ * MPC85xx PM operators
+ *
+ * Copyright 2015 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.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/fsl/guts.h>
+
+#include <asm/io.h>
+#include <asm/fsl_pm.h>
+
+static struct ccsr_guts __iomem *guts;
+
+static void mpc85xx_irq_mask(int cpu)
+{
+
+}
+
+static void mpc85xx_irq_unmask(int cpu)
+{
+
+}
+
+static void mpc85xx_cpu_die(int cpu)
+{
+       u32 tmp;
+
+       tmp = (mfspr(SPRN_HID0) & ~(HID0_DOZE|HID0_SLEEP)) | HID0_NAP;
+       mtspr(SPRN_HID0, tmp);
+
+       /* Enter NAP mode. */
+       tmp = mfmsr();
+       tmp |= MSR_WE;
+       asm volatile(
+               "msync\n"
+               "mtmsr %0\n"
+               "isync\n"
+               :
+               : "r" (tmp));
+}
+
+static void mpc85xx_cpu_up_prepare(int cpu)
+{
+
+}
+
+static void mpc85xx_freeze_time_base(bool freeze)
+{
+       uint32_t mask;
+
+       mask = CCSR_GUTS_DEVDISR_TB0 | CCSR_GUTS_DEVDISR_TB1;
+       if (freeze)
+               setbits32(&guts->devdisr, mask);
+       else
+               clrbits32(&guts->devdisr, mask);
+
+       in_be32(&guts->devdisr);
+}
+
+static const struct of_device_id mpc85xx_smp_guts_ids[] = {
+       { .compatible = "fsl,mpc8572-guts", },
+       { .compatible = "fsl,p1020-guts", },
+       { .compatible = "fsl,p1021-guts", },
+       { .compatible = "fsl,p1022-guts", },
+       { .compatible = "fsl,p1023-guts", },
+       { .compatible = "fsl,p2020-guts", },
+       { .compatible = "fsl,bsc9132-guts", },
+       {},
+};
+
+static const struct fsl_pm_ops mpc85xx_pm_ops = {
+       .freeze_time_base = mpc85xx_freeze_time_base,
+       .irq_mask = mpc85xx_irq_mask,
+       .irq_unmask = mpc85xx_irq_unmask,
+       .cpu_die = mpc85xx_cpu_die,
+       .cpu_up_prepare = mpc85xx_cpu_up_prepare,
+};
+
+int __init mpc85xx_setup_pmc(void)
+{
+       struct device_node *np;
+
+       np = of_find_matching_node(NULL, mpc85xx_smp_guts_ids);
+       if (np) {
+               guts = of_iomap(np, 0);
+               of_node_put(np);
+               if (!guts) {
+                       pr_err("Could not map guts node address\n");
+                       return -ENOMEM;
+               }
+       }
+
+       qoriq_pm_ops = &mpc85xx_pm_ops;
+
+       return 0;
+}

diff --git a/arch/powerpc/platforms/85xx/smp.c b/arch/powerpc/platforms/85xx/smp.c
index 4a7841616c7ff5763b6f5a5efa370ba32921cc86..ab0459d904ff8b7554bf8634fdfae139b2478a76 100644 (file)
--- a/arch/powerpc/platforms/85xx/smp.c
+++ b/arch/powerpc/platforms/85xx/smp.c
@@ -2,7 +2,7 @@
  * Author: Andy Fleming <afleming@freescale.com>
  *        Kumar Gala <galak@kernel.crashing.org>
  *
- * Copyright 2006-2008, 2011-2012 Freescale Semiconductor Inc.
+ * Copyright 2006-2008, 2011-2012, 2015 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
@@ -15,7 +15,6 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/of.h>
-#include <linux/of_address.h>
 #include <linux/kexec.h>
 #include <linux/highmem.h>
 #include <linux/cpu.h>
@@ -29,6 +28,7 @@
 #include <asm/dbell.h>
 #include <asm/code-patching.h>
 #include <asm/cputhreads.h>
+#include <asm/fsl_pm.h>
 
 #include <sysdev/fsl_soc.h>
 #include <sysdev/mpic.h>
@@ -43,24 +43,11 @@ struct epapr_spin_table {
        u32     pir;
 };
 
-static struct ccsr_guts __iomem *guts;
+#ifdef CONFIG_HOTPLUG_CPU
 static u64 timebase;
 static int tb_req;
 static int tb_valid;
 
-static void mpc85xx_timebase_freeze(int freeze)
-{
-       uint32_t mask;
-
-       mask = CCSR_GUTS_DEVDISR_TB0 | CCSR_GUTS_DEVDISR_TB1;
-       if (freeze)
-               setbits32(&guts->devdisr, mask);
-       else
-               clrbits32(&guts->devdisr, mask);
-
-       in_be32(&guts->devdisr);
-}
-
 static void mpc85xx_give_timebase(void)
 {
        unsigned long flags;
@@ -71,7 +58,7 @@ static void mpc85xx_give_timebase(void)
                barrier();
        tb_req = 0;
 
-       mpc85xx_timebase_freeze(1);
+       qoriq_pm_ops->freeze_time_base(true);
 #ifdef CONFIG_PPC64
        /*
         * e5500/e6500 have a workaround for erratum A-006958 in place
@@ -104,7 +91,7 @@ static void mpc85xx_give_timebase(void)
        while (tb_valid)
                barrier();
 
-       mpc85xx_timebase_freeze(0);
+       qoriq_pm_ops->freeze_time_base(false);
 
        local_irq_restore(flags);
 }
@@ -126,31 +113,25 @@ static void mpc85xx_take_timebase(void)
        local_irq_restore(flags);
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
 static void smp_85xx_mach_cpu_die(void)
 {
        unsigned int cpu = smp_processor_id();
-       u32 tmp;
 
        local_irq_disable();
+       hard_irq_disable();
+       /* mask all irqs to prevent cpu wakeup */
+       qoriq_pm_ops->irq_mask(cpu);
+
        idle_task_exit();
-       generic_set_cpu_dead(cpu);
-       mb();
 
        mtspr(SPRN_TCR, 0);
+       mtspr(SPRN_TSR, mfspr(SPRN_TSR));
 
-       cur_cpu_spec->cpu_down_flush();
+       generic_set_cpu_dead(cpu);
 
-       tmp = (mfspr(SPRN_HID0) & ~(HID0_DOZE|HID0_SLEEP)) | HID0_NAP;
-       mtspr(SPRN_HID0, tmp);
-       isync();
+       cur_cpu_spec->cpu_down_flush();
 
-       /* Enter NAP mode. */
-       tmp = mfmsr();
-       tmp |= MSR_WE;
-       mb();
-       mtmsr(tmp);
-       isync();
+       qoriq_pm_ops->cpu_die(cpu);
 
        while (1)
                ;
@@ -468,16 +449,6 @@ static void smp_85xx_setup_cpu(int cpu_nr)
        smp_85xx_basic_setup(cpu_nr);
 }
 
-static const struct of_device_id mpc85xx_smp_guts_ids[] = {
-       { .compatible = "fsl,mpc8572-guts", },
-       { .compatible = "fsl,p1020-guts", },
-       { .compatible = "fsl,p1021-guts", },
-       { .compatible = "fsl,p1022-guts", },
-       { .compatible = "fsl,p1023-guts", },
-       { .compatible = "fsl,p2020-guts", },
-       {},
-};
-
 void __init mpc85xx_smp_init(void)
 {
        struct device_node *np;
@@ -501,22 +472,16 @@ void __init mpc85xx_smp_init(void)
                smp_85xx_ops.probe = NULL;
        }
 
-       np = of_find_matching_node(NULL, mpc85xx_smp_guts_ids);
-       if (np) {
-               guts = of_iomap(np, 0);
-               of_node_put(np);
-               if (!guts) {
-                       pr_err("%s: Could not map guts node address\n",
-                                                               __func__);
-                       return;
-               }
+#ifdef CONFIG_HOTPLUG_CPU
+#ifdef CONFIG_FSL_PMC
+       mpc85xx_setup_pmc();
+#endif
+       if (qoriq_pm_ops) {
                smp_85xx_ops.give_timebase = mpc85xx_give_timebase;
                smp_85xx_ops.take_timebase = mpc85xx_take_timebase;
-#ifdef CONFIG_HOTPLUG_CPU
                ppc_md.cpu_die = smp_85xx_mach_cpu_die;
-#endif
        }
-
+#endif
        smp_ops = &smp_85xx_ops;
 
 #ifdef CONFIG_KEXEC

diff --git a/arch/powerpc/platforms/85xx/smp.h b/arch/powerpc/platforms/85xx/smp.h
index e2b44933ff197bcb5aed6a895de6f18056bf91f2..0b20ae315c539116a05fee644a487d593911a163 100644 (file)
--- a/arch/powerpc/platforms/85xx/smp.h
+++ b/arch/powerpc/platforms/85xx/smp.h
@@ -5,6 +5,7 @@
 
 #ifdef CONFIG_SMP
 void __init mpc85xx_smp_init(void);
+int __init mpc85xx_setup_pmc(void);
 #else
 static inline void mpc85xx_smp_init(void)
 {