Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [RAPIDIO] Change RapidIO doorbell source and target ID field to 16-bit
  [RAPIDIO] Add RapidIO connection info print out and re-training for broken connections
  [RAPIDIO] Add serial RapidIO controller support, which includes MPC8548, MPC8641
  [RAPIDIO] Add RapidIO node probing into MPC86xx_HPCN board id table
  [RAPIDIO] Add RapidIO node into MPC8641HPCN dts file
  [RAPIDIO] Auto-probe the RapidIO system size
  [RAPIDIO] Add OF-tree support to RapidIO controller driver
  [RAPIDIO] Add RapidIO multi mport support
  [RAPIDIO] Move include/asm-ppc/rio.h to asm-powerpc
  [RAPIDIO] Add RapidIO option to kernel configuration
  [RAPIDIO] Change RIO function mpc85xx_ to fsl_
  [POWERPC] Provide walk_memory_resource() for powerpc
  [POWERPC] Update lmb data structures for hotplug memory add/remove
  [POWERPC] Hotplug memory remove notifications for powerpc
  [POWERPC] windfarm: Add PowerMac 12,1 support
  [POWERPC] Fix building of pmac32 when CONFIG_NVRAM=m
  [POWERPC] Add IRQSTACKS support on ppc32
  [POWERPC] Use __always_inline for xchg* and cmpxchg*
  [POWERPC] Add fast little-endian switch system call

6 files changed, 150 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/86xx/Kconfig b/arch/powerpc/platforms/86xx/Kconfig
index 7442c58d44f5..053f49a1dcae 100644
--- a/arch/powerpc/platforms/86xx/Kconfig
+++ b/arch/powerpc/platforms/86xx/Kconfig
@@ -8,6 +8,7 @@ config MPC8641_HPCN
         select PPC_I8259
         select DEFAULT_UIMAGE
         select FSL_ULI1575
+        select HAS_RAPIDIO
         help
           This option enables support for the MPC8641 HPCN board.
 
diff --git a/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
index f947f555fd46..f13704aabbea 100644
--- a/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
+++ b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
@@ -221,6 +221,7 @@ mpc86xx_time_init(void)
 
 static __initdata struct of_device_id of_bus_ids[] = {
         { .compatible = "simple-bus", },
+        { .compatible = "fsl,rapidio-delta", },
         {},
 };
 
diff --git a/arch/powerpc/platforms/powermac/Makefile b/arch/powerpc/platforms/powermac/Makefile
index 78093d7f97af..4d72c8f72159 100644
--- a/arch/powerpc/platforms/powermac/Makefile
+++ b/arch/powerpc/platforms/powermac/Makefile
@@ -6,7 +6,10 @@ obj-y				+= pic.o setup.o time.o feature.o pci.o \
 obj-$(CONFIG_PMAC_BACKLIGHT)    += backlight.o
 obj-$(CONFIG_CPU_FREQ_PMAC)     += cpufreq_32.o
 obj-$(CONFIG_CPU_FREQ_PMAC64)   += cpufreq_64.o
-obj-$(CONFIG_NVRAM)             += nvram.o
+# CONFIG_NVRAM is an arch. independant tristate symbol, for pmac32 we really
+# need this to be a bool.  Cheat here and pretend CONFIG_NVRAM=m is really
+# CONFIG_NVRAM=y
+obj-$(CONFIG_NVRAM:m=y)         += nvram.o
 # ppc64 pmac doesn't define CONFIG_NVRAM but needs nvram stuff
 obj-$(CONFIG_PPC64)             += nvram.o
 obj-$(CONFIG_PPC32)             += bootx_init.o
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index bf44c5441a36..00bd0166d07f 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -337,7 +337,8 @@ static void __init pmac_setup_arch(void)
         find_via_pmu();
         smu_init();
 
-#if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
+#if defined(CONFIG_NVRAM) || defined(CONFIG_NVRAM_MODULE) || \
+    defined(CONFIG_PPC64)
         pmac_nvram_init();
 #endif
 
diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile
index bd2593ed28dd..554c6e42ef2a 100644
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_PCI)	+= pci.o pci_dlpar.o
 obj-$(CONFIG_PCI_MSI)   += msi.o
 
 obj-$(CONFIG_HOTPLUG_CPU)       += hotplug-cpu.o
+obj-$(CONFIG_MEMORY_HOTPLUG)    += hotplug-memory.o
 
 obj-$(CONFIG_HVC_CONSOLE)       += hvconsole.o
 obj-$(CONFIG_HVCS)              += hvcserver.o
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
new file mode 100644
index 000000000000..3c5727dd5aa5
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -0,0 +1,141 @@
+/*
+ * pseries Memory Hotplug infrastructure.
+ *
+ * Copyright (C) 2008 Badari Pulavarty, IBM Corporation
+ *
+ *      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/of.h>
+#include <linux/lmb.h>
+#include <asm/firmware.h>
+#include <asm/machdep.h>
+#include <asm/pSeries_reconfig.h>
+
+static int pseries_remove_memory(struct device_node *np)
+{
+        const char *type;
+        const unsigned int *my_index;
+        const unsigned int *regs;
+        u64 start_pfn, start;
+        struct zone *zone;
+        int ret = -EINVAL;
+
+        /*
+         * Check to see if we are actually removing memory
+         */
+        type = of_get_property(np, "device_type", NULL);
+        if (type == NULL || strcmp(type, "memory") != 0)
+                return 0;
+
+        /*
+         * Find the memory index and size of the removing section
+         */
+        my_index = of_get_property(np, "ibm,my-drc-index", NULL);
+        if (!my_index)
+                return ret;
+
+        regs = of_get_property(np, "reg", NULL);
+        if (!regs)
+                return ret;
+
+        start_pfn = section_nr_to_pfn(*my_index & 0xffff);
+        zone = page_zone(pfn_to_page(start_pfn));
+
+        /*
+         * Remove section mappings and sysfs entries for the
+         * section of the memory we are removing.
+         *
+         * NOTE: Ideally, this should be done in generic code like
+         * remove_memory(). But remove_memory() gets called by writing
+         * to sysfs "state" file and we can't remove sysfs entries
+         * while writing to it. So we have to defer it to here.
+         */
+        ret = __remove_pages(zone, start_pfn, regs[3] >> PAGE_SHIFT);
+        if (ret)
+                return ret;
+
+        /*
+         * Update memory regions for memory remove
+         */
+        lmb_remove(start_pfn << PAGE_SHIFT, regs[3]);
+
+        /*
+         * Remove htab bolted mappings for this section of memory
+         */
+        start = (unsigned long)__va(start_pfn << PAGE_SHIFT);
+        ret = remove_section_mapping(start, start + regs[3]);
+        return ret;
+}
+
+static int pseries_add_memory(struct device_node *np)
+{
+        const char *type;
+        const unsigned int *my_index;
+        const unsigned int *regs;
+        u64 start_pfn;
+        int ret = -EINVAL;
+
+        /*
+         * Check to see if we are actually adding memory
+         */
+        type = of_get_property(np, "device_type", NULL);
+        if (type == NULL || strcmp(type, "memory") != 0)
+                return 0;
+
+        /*
+         * Find the memory index and size of the added section
+         */
+        my_index = of_get_property(np, "ibm,my-drc-index", NULL);
+        if (!my_index)
+                return ret;
+
+        regs = of_get_property(np, "reg", NULL);
+        if (!regs)
+                return ret;
+
+        start_pfn = section_nr_to_pfn(*my_index & 0xffff);
+
+        /*
+         * Update memory region to represent the memory add
+         */
+        lmb_add(start_pfn << PAGE_SHIFT, regs[3]);
+        return 0;
+}
+
+static int pseries_memory_notifier(struct notifier_block *nb,
+                                unsigned long action, void *node)
+{
+        int err = NOTIFY_OK;
+
+        switch (action) {
+        case PSERIES_RECONFIG_ADD:
+                if (pseries_add_memory(node))
+                        err = NOTIFY_BAD;
+                break;
+        case PSERIES_RECONFIG_REMOVE:
+                if (pseries_remove_memory(node))
+                        err = NOTIFY_BAD;
+                break;
+        default:
+                err = NOTIFY_DONE;
+                break;
+        }
+        return err;
+}
+
+static struct notifier_block pseries_mem_nb = {
+        .notifier_call = pseries_memory_notifier,
+};
+
+static int __init pseries_memory_hotplug_init(void)
+{
+        if (firmware_has_feature(FW_FEATURE_LPAR))
+                pSeries_reconfig_notifier_register(&pseries_mem_nb);
+
+        return 0;
+}
+machine_device_initcall(pseries, pseries_memory_hotplug_init);