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

[linux-2.6.git] / include / asm-arm / arch-ixp23xx / memory.h

diff --git a/include/asm-arm/arch-ixp23xx/memory.h b/include/asm-arm/arch-ixp23xx/memory.h
new file mode 100644 (file)
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+++ b/include/asm-arm/arch-ixp23xx/memory.h
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+/*
+ * include/asm-arm/arch-ixp23xx/memory.h
+ *
+ * Copyright (c) 2003-2004 Intel Corp.
+ *
+ * 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.
+ */
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#include <asm/hardware.h>
+
+/*
+ * Physical DRAM offset.
+ */
+#define PHYS_OFFSET            (0x00000000)
+
+
+/*
+ * Virtual view <-> DMA view memory address translations
+ * virt_to_bus: Used to translate the virtual address to an
+ *             address suitable to be passed to set_dma_addr
+ * bus_to_virt: Used to convert an address for DMA operations
+ *             to an address that the kernel can use.
+ */
+#ifndef __ASSEMBLY__
+#include <asm/mach-types.h>
+
+#define __virt_to_bus(v)                                               \
+       ({ unsigned int ret;                                            \
+       ret = ((__virt_to_phys(v) - 0x00000000) +                       \
+        (*((volatile int *)IXP23XX_PCI_SDRAM_BAR) & 0xfffffff0));      \
+       ret; })
+
+#define __bus_to_virt(b)                                               \
+       ({ unsigned int data;                                           \
+       data = *((volatile int *)IXP23XX_PCI_SDRAM_BAR);                \
+        __phys_to_virt((((b - (data & 0xfffffff0)) + 0x00000000))); })
+
+/*
+ * Coherency support.  Only supported on A2 CPUs or on A1
+ * systems that have the cache coherency workaround.
+ */
+static inline int __ixp23xx_arch_is_coherent(void)
+{
+       extern unsigned int processor_id;
+
+       if (((processor_id & 15) >= 4) || machine_is_roadrunner())
+               return 1;
+
+       return 0;
+}
+
+#define arch_is_coherent()     __ixp23xx_arch_is_coherent()
+
+#endif
+
+
+#endif