Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / mach-realview / include / mach / memory.h

diff --git a/kernel/arch/arm/mach-realview/include/mach/memory.h b/kernel/arch/arm/mach-realview/include/mach/memory.h
new file mode 100644 (file)
index 0000000..23e7a31
--- /dev/null
+++ b/kernel/arch/arm/mach-realview/include/mach/memory.h
@@ -0,0 +1,64 @@
+/*
+ *  arch/arm/mach-realview/include/mach/memory.h
+ *
+ *  Copyright (C) 2003 ARM Limited
+ *
+ * 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 __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#ifdef CONFIG_SPARSEMEM
+
+/*
+ * Sparsemem definitions for RealView PBX.
+ *
+ * The RealView PBX board has another block of 512MB of RAM at 0x20000000,
+ * however only the block at 0x70000000 (or the 256MB mirror at 0x00000000)
+ * may be used for DMA.
+ *
+ * The macros below define a section size of 256MB and a non-linear virtual to
+ * physical mapping:
+ *
+ * 256MB @ 0x00000000 -> PAGE_OFFSET
+ * 512MB @ 0x20000000 -> PAGE_OFFSET + 0x10000000
+ * 256MB @ 0x80000000 -> PAGE_OFFSET + 0x30000000
+ */
+#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
+#error "SPARSEMEM not available with REALVIEW_HIGH_PHYS_OFFSET"
+#endif
+
+#define MAX_PHYSMEM_BITS       32
+#define SECTION_SIZE_BITS      28
+
+/* bank page offsets */
+#define PAGE_OFFSET1   (PAGE_OFFSET + 0x10000000)
+#define PAGE_OFFSET2   (PAGE_OFFSET + 0x30000000)
+
+#define PHYS_OFFSET PLAT_PHYS_OFFSET
+
+#define __phys_to_virt(phys)                                           \
+       ((phys) >= 0x80000000 ? (phys) - 0x80000000 + PAGE_OFFSET2 :    \
+        (phys) >= 0x20000000 ? (phys) - 0x20000000 + PAGE_OFFSET1 :    \
+        (phys) + PAGE_OFFSET)
+
+#define __virt_to_phys(virt)                                           \
+        ((virt) >= PAGE_OFFSET2 ? (virt) - PAGE_OFFSET2 + 0x80000000 : \
+         (virt) >= PAGE_OFFSET1 ? (virt) - PAGE_OFFSET1 + 0x20000000 : \
+         (virt) - PAGE_OFFSET)
+
+#endif /* CONFIG_SPARSEMEM */
+
+#endif