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authorGreg Ungerer <gerg@uclinux.org>2009-02-06 14:14:29 +1000
committerGreg Ungerer <gerg@uclinux.org>2009-03-24 15:17:44 +1000
commit4892242a47fe21724ee6a98d71d9c512716ea89d (patch)
treee18ec0dfffbf1c0a70aa0553911190b732b27ee0 /arch/m68k/include/asm/segment.h
parent872065e78c0dff5a384128ea198b34f72e9d5c3a (diff)
downloadop-kernel-dev-4892242a47fe21724ee6a98d71d9c512716ea89d.zip
op-kernel-dev-4892242a47fe21724ee6a98d71d9c512716ea89d.tar.gz
m68k: merge the mmu and non-mmu versions of segment.h
Trivial merge of the mmu and non-mmu version of segment.h. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/include/asm/segment.h')
-rw-r--r--arch/m68k/include/asm/segment.h64
1 files changed, 61 insertions, 3 deletions
diff --git a/arch/m68k/include/asm/segment.h b/arch/m68k/include/asm/segment.h
index 82583bc..ee95921 100644
--- a/arch/m68k/include/asm/segment.h
+++ b/arch/m68k/include/asm/segment.h
@@ -1,5 +1,63 @@
-#ifdef __uClinux__
-#include "segment_no.h"
+#ifndef _M68K_SEGMENT_H
+#define _M68K_SEGMENT_H
+
+/* define constants */
+/* Address spaces (FC0-FC2) */
+#define USER_DATA (1)
+#ifndef __USER_DS
+#define __USER_DS (USER_DATA)
+#endif
+#define USER_PROGRAM (2)
+#define SUPER_DATA (5)
+#ifndef __KERNEL_DS
+#define __KERNEL_DS (SUPER_DATA)
+#endif
+#define SUPER_PROGRAM (6)
+#define CPU_SPACE (7)
+
+#ifndef __ASSEMBLY__
+
+typedef struct {
+ unsigned long seg;
+} mm_segment_t;
+
+#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
+#define USER_DS MAKE_MM_SEG(__USER_DS)
+#define KERNEL_DS MAKE_MM_SEG(__KERNEL_DS)
+
+/*
+ * Get/set the SFC/DFC registers for MOVES instructions
+ */
+
+static inline mm_segment_t get_fs(void)
+{
+#ifdef CONFIG_MMU
+ mm_segment_t _v;
+ __asm__ ("movec %/dfc,%0":"=r" (_v.seg):);
+
+ return _v;
#else
-#include "segment_mm.h"
+ return USER_DS;
+#endif
+}
+
+static inline mm_segment_t get_ds(void)
+{
+ /* return the supervisor data space code */
+ return KERNEL_DS;
+}
+
+static inline void set_fs(mm_segment_t val)
+{
+#ifdef CONFIG_MMU
+ __asm__ __volatile__ ("movec %0,%/sfc\n\t"
+ "movec %0,%/dfc\n\t"
+ : /* no outputs */ : "r" (val.seg) : "memory");
#endif
+}
+
+#define segment_eq(a,b) ((a).seg == (b).seg)
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _M68K_SEGMENT_H */
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