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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-cris/arch-v10/page.h
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-cris/arch-v10/page.h')
-rw-r--r--include/asm-cris/arch-v10/page.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-cris/arch-v10/page.h b/include/asm-cris/arch-v10/page.h
new file mode 100644
index 000000000000..407e6e68f49e
--- /dev/null
+++ b/include/asm-cris/arch-v10/page.h
@@ -0,0 +1,31 @@
+#ifndef _CRIS_ARCH_PAGE_H
+#define _CRIS_ARCH_PAGE_H
+
+#include <linux/config.h>
+
+#ifdef __KERNEL__
+
+/* This handles the memory map.. */
+#ifdef CONFIG_CRIS_LOW_MAP
+#define PAGE_OFFSET KSEG_6 /* kseg_6 is mapped to physical ram */
+#else
+#define PAGE_OFFSET KSEG_C /* kseg_c is mapped to physical ram */
+#endif
+
+/* macros to convert between really physical and virtual addresses
+ * by stripping a selected bit, we can convert between KSEG_x and 0x40000000 where
+ * the DRAM really resides
+ */
+
+#ifdef CONFIG_CRIS_LOW_MAP
+/* we have DRAM virtually at 0x6 */
+#define __pa(x) ((unsigned long)(x) & 0xdfffffff)
+#define __va(x) ((void *)((unsigned long)(x) | 0x20000000))
+#else
+/* we have DRAM virtually at 0xc */
+#define __pa(x) ((unsigned long)(x) & 0x7fffffff)
+#define __va(x) ((void *)((unsigned long)(x) | 0x80000000))
+#endif
+
+#endif
+#endif
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