4 files changed, 181 insertions, 2 deletions

diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 8acd21dee05d..6b7efcfc352a 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -5,3 +5,4 @@ obj-$(CONFIG_PPC_MPC106)	+= grackle.o
 obj-$(CONFIG_BOOKE)             += dcr.o
 obj-$(CONFIG_40x)               += dcr.o
 obj-$(CONFIG_U3_DART)           += u3_iommu.o
+obj-$(CONFIG_MMIO_NVRAM)        += mmio_nvram.o
diff --git a/arch/powerpc/sysdev/dart.h b/arch/powerpc/sysdev/dart.h
new file mode 100644
index 000000000000..ea8f0d9eed8a
--- /dev/null
+++ b/arch/powerpc/sysdev/dart.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2004 Olof Johansson <olof@austin.ibm.com>, 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#ifndef _POWERPC_SYSDEV_DART_H
+#define _POWERPC_SYSDEV_DART_H
+
+
+/* physical base of DART registers */
+#define DART_BASE        0xf8033000UL
+
+/* Offset from base to control register */
+#define DARTCNTL   0
+/* Offset from base to exception register */
+#define DARTEXCP   0x10
+/* Offset from base to TLB tag registers */
+#define DARTTAG    0x1000
+
+
+/* Control Register fields */
+
+/* base address of table (pfn) */
+#define DARTCNTL_BASE_MASK    0xfffff
+#define DARTCNTL_BASE_SHIFT   12
+
+#define DARTCNTL_FLUSHTLB     0x400
+#define DARTCNTL_ENABLE       0x200
+
+/* size of table in pages */
+#define DARTCNTL_SIZE_MASK    0x1ff
+#define DARTCNTL_SIZE_SHIFT   0
+
+
+/* DART table fields */
+
+#define DARTMAP_VALID   0x80000000
+#define DARTMAP_RPNMASK 0x00ffffff
+
+
+#define DART_PAGE_SHIFT         12
+#define DART_PAGE_SIZE          (1 << DART_PAGE_SHIFT)
+#define DART_PAGE_FACTOR        (PAGE_SHIFT - DART_PAGE_SHIFT)
+
+
+#endif /* _POWERPC_SYSDEV_DART_H */
diff --git a/arch/powerpc/sysdev/mmio_nvram.c b/arch/powerpc/sysdev/mmio_nvram.c
new file mode 100644
index 000000000000..74e0d31a3559
--- /dev/null
+++ b/arch/powerpc/sysdev/mmio_nvram.c
@@ -0,0 +1,118 @@
+/*
+ * memory mapped NVRAM
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Authors : Utz Bacher <utz.bacher@de.ibm.com>
+ *
+ * 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, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <asm/machdep.h>
+#include <asm/nvram.h>
+#include <asm/prom.h>
+
+static void __iomem *mmio_nvram_start;
+static long mmio_nvram_len;
+static spinlock_t mmio_nvram_lock = SPIN_LOCK_UNLOCKED;
+
+static ssize_t mmio_nvram_read(char *buf, size_t count, loff_t *index)
+{
+        unsigned long flags;
+
+        if (*index >= mmio_nvram_len)
+                return 0;
+        if (*index + count > mmio_nvram_len)
+                count = mmio_nvram_len - *index;
+
+        spin_lock_irqsave(&mmio_nvram_lock, flags);
+
+        memcpy_fromio(buf, mmio_nvram_start + *index, count);
+
+        spin_unlock_irqrestore(&mmio_nvram_lock, flags);
+        
+        *index += count;
+        return count;
+}
+
+static ssize_t mmio_nvram_write(char *buf, size_t count, loff_t *index)
+{
+        unsigned long flags;
+
+        if (*index >= mmio_nvram_len)
+                return 0;
+        if (*index + count > mmio_nvram_len)
+                count = mmio_nvram_len - *index;
+
+        spin_lock_irqsave(&mmio_nvram_lock, flags);
+
+        memcpy_toio(mmio_nvram_start + *index, buf, count);
+
+        spin_unlock_irqrestore(&mmio_nvram_lock, flags);
+        
+        *index += count;
+        return count;
+}
+
+static ssize_t mmio_nvram_get_size(void)
+{
+        return mmio_nvram_len;
+}
+
+int __init mmio_nvram_init(void)
+{
+        struct device_node *nvram_node;
+        unsigned long *buffer;
+        int proplen;
+        unsigned long nvram_addr;
+        int ret;
+
+        ret = -ENODEV;
+        nvram_node = of_find_node_by_type(NULL, "nvram");
+        if (!nvram_node)
+                goto out;
+
+        ret = -EIO;
+        buffer = (unsigned long *)get_property(nvram_node, "reg", &proplen);
+        if (proplen != 2*sizeof(unsigned long))
+                goto out;
+
+        ret = -ENODEV;
+        nvram_addr = buffer[0];
+        mmio_nvram_len = buffer[1];
+        if ( (!mmio_nvram_len) || (!nvram_addr) )
+                goto out;
+
+        mmio_nvram_start = ioremap(nvram_addr, mmio_nvram_len);
+        if (!mmio_nvram_start)
+                goto out;
+
+        printk(KERN_INFO "mmio NVRAM, %luk mapped to %p\n",
+               mmio_nvram_len >> 10, mmio_nvram_start);
+
+        ppc_md.nvram_read       = mmio_nvram_read;
+        ppc_md.nvram_write      = mmio_nvram_write;
+        ppc_md.nvram_size       = mmio_nvram_get_size;
+
+out:
+        of_node_put(nvram_node);
+        return ret;
+}
diff --git a/arch/powerpc/sysdev/u3_iommu.c b/arch/powerpc/sysdev/u3_iommu.c
index fba871a1bda5..607722178c1a 100644
--- a/arch/powerpc/sysdev/u3_iommu.c
+++ b/arch/powerpc/sysdev/u3_iommu.c
@@ -1,5 +1,5 @@
 /*
- * arch/ppc64/kernel/u3_iommu.c
+ * arch/powerpc/sysdev/u3_iommu.c
  *
  * Copyright (C) 2004 Olof Johansson <olof@austin.ibm.com>, IBM Corporation
  *
@@ -44,9 +44,10 @@
 #include <asm/abs_addr.h>
 #include <asm/cacheflush.h>
 #include <asm/lmb.h>
-#include <asm/dart.h>
 #include <asm/ppc-pci.h>
 
+#include "dart.h"
+
 extern int iommu_force_on;
 
 /* Physical base address and size of the DART table */