patch-2.4.19 linux-2.4.19/include/asm-ppc64/abs_addr.h

• Lines: 122
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/include/asm-ppc64/abs_addr.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/include/asm-ppc64/abs_addr.h linux-2.4.19/include/asm-ppc64/abs_addr.h
@@ -0,0 +1,121 @@
+#ifndef _ABS_ADDR_H
+#define _ABS_ADDR_H
+
+#include <linux/config.h>
+
+/*
+ * c 2001 PPC 64 Team, IBM 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.
+ */
+
+#include <asm/types.h>
+#include <asm/page.h>
+#include <asm/prom.h>
+#include <asm/lmb.h>
+
+typedef u32 msChunks_entry;
+struct msChunks {
+        unsigned long num_chunks;
+        unsigned long chunk_size;
+        unsigned long chunk_shift;
+        unsigned long chunk_mask;
+        msChunks_entry *abs;
+};
+
+extern struct msChunks msChunks;
+
+extern unsigned long msChunks_alloc(unsigned long, unsigned long, unsigned long);
+extern unsigned long reloc_offset(void);
+
+#ifdef CONFIG_MSCHUNKS
+
+static inline unsigned long
+chunk_to_addr(unsigned long chunk)
+{
+	unsigned long offset = reloc_offset();
+	struct msChunks *_msChunks = PTRRELOC(&msChunks);
+
+	return chunk << _msChunks->chunk_shift;
+}
+
+static inline unsigned long
+addr_to_chunk(unsigned long addr)
+{
+	unsigned long offset = reloc_offset();
+	struct msChunks *_msChunks = PTRRELOC(&msChunks);
+
+	return addr >> _msChunks->chunk_shift;
+}
+
+static inline unsigned long
+chunk_offset(unsigned long addr)
+{
+	unsigned long offset = reloc_offset();
+	struct msChunks *_msChunks = PTRRELOC(&msChunks);
+
+	return addr & _msChunks->chunk_mask;
+}
+
+static inline unsigned long
+abs_chunk(unsigned long pchunk)
+{
+	unsigned long offset = reloc_offset();
+	struct msChunks *_msChunks = PTRRELOC(&msChunks);
+	if ( pchunk >= _msChunks->num_chunks ) {
+		return pchunk;
+	}
+	return PTRRELOC(_msChunks->abs)[pchunk];
+}
+
+
+static inline unsigned long
+phys_to_absolute(unsigned long pa)
+{
+	return chunk_to_addr(abs_chunk(addr_to_chunk(pa))) + chunk_offset(pa);
+}
+
+static inline unsigned long
+physRpn_to_absRpn(unsigned long rpn)
+{
+	unsigned long pa = rpn << PAGE_SHIFT;
+	unsigned long aa = phys_to_absolute(pa);
+	return (aa >> PAGE_SHIFT);
+}
+
+static inline unsigned long
+absolute_to_phys(unsigned long aa)
+{
+	return lmb_abs_to_phys(aa);
+}
+
+#else  /* !CONFIG_MSCHUNKS */
+
+#define chunk_to_addr(chunk) ((unsigned long)(chunk))
+#define addr_to_chunk(addr) (addr)
+#define chunk_offset(addr) (0)
+#define abs_chunk(pchunk) (pchunk)
+
+#define phys_to_absolute(pa) (pa)
+#define physRpn_to_absRpn(rpn) (rpn)
+#define absolute_to_phys(aa) (aa)
+
+#endif /* !CONFIG_MSCHUNKS */
+
+
+static inline unsigned long
+virt_to_absolute(unsigned long ea)
+{
+	return phys_to_absolute(__pa(ea));
+}
+
+static inline unsigned long
+absolute_to_virt(unsigned long aa)
+{
+	return (unsigned long)__va(absolute_to_phys(aa));
+}
+
+#endif /* _ABS_ADDR_H */