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-rw-r--r--include/asm-m68k/segment.h230
1 files changed, 18 insertions, 212 deletions
diff --git a/include/asm-m68k/segment.h b/include/asm-m68k/segment.h
index 89079be3f..5fe0c033f 100644
--- a/include/asm-m68k/segment.h
+++ b/include/asm-m68k/segment.h
@@ -1,208 +1,21 @@
-/*
- * linux/include/asm-m68k/segment.h
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file README.legal in the main directory of this archive
- * for more details.
- */
-
-/*
- * 680x0 support added by Hamish Macdonald
- */
-
#ifndef _M68K_SEGMENT_H
#define _M68K_SEGMENT_H
-static inline unsigned char get_user_byte(const char * addr)
-{
- register unsigned char _v;
-
- __asm__ __volatile__ ("movesb %1,%0":"=r" (_v):"m" (*addr));
- return _v;
-}
-
-#define get_fs_byte(addr) get_user_byte((char *)(addr))
-
-static inline unsigned short get_user_word(const short *addr)
-{
- unsigned short _v;
-
- __asm__ __volatile__ ("movesw %1,%0":"=r" (_v):"m" (*addr));
- return _v;
-}
-
-#define get_fs_word(addr) get_user_word((short *)(addr))
-
-static inline unsigned long get_user_long(const int *addr)
-{
- unsigned long _v;
-
- __asm__ __volatile__ ("movesl %1,%0":"=r" (_v):"m" (*addr)); \
- return _v;
-}
-
-#define get_fs_long(addr) get_user_long((int *)(addr))
-
-static inline void put_user_byte(char val,char *addr)
-{
- __asm__ __volatile__ ("movesb %0,%1": /* no outputs */ :"r" (val),"m" (*addr) : "memory");
-}
-
-#define put_fs_byte(x,addr) put_user_byte((x),(char *)(addr))
-
-static inline void put_user_word(short val,short * addr)
-{
- __asm__ __volatile__ ("movesw %0,%1": /* no outputs */ :"r" (val),"m" (*addr) : "memory");
-}
-
-#define put_fs_word(x,addr) put_user_word((x),(short *)(addr))
-
-static inline void put_user_long(unsigned long val,int * addr)
-{
- __asm__ __volatile__ ("movesl %0,%1": /* no outputs */ :"r" (val),"m" (*addr) : "memory");
-}
-
-#define put_fs_long(x,addr) put_user_long((x),(int *)(addr))
-
-static inline void __generic_memcpy_tofs(void * to, const void * from, unsigned long n)
-{
- if (n == 0) return;
- __asm__ __volatile__ ("1:\n\t"
- "moveb %1@+,d0\n\t"
- "movesb d0,%2@+\n\t"
- "dbra %0,1b\n\t"
- "clrw %0\n\t"
- "subql #1,%0\n\t"
- "bccs 1b"
- : "=d" (n), "=a" (from), "=a" (to)
- : "1" (from), "2" (to), "0" (n-1)
- : "d0", "memory");
-}
-
-static inline void __constant_memcpy_tofs(void * to, const void * from, unsigned long n)
-{
- if (n == 0) {
- return;
- } else if (n == 1) {
- put_user_byte(*(const char *) from, (char *) to);
- return;
- } else if (n == 2) {
- put_user_word(*(const short *) from, (short *) to);
- return;
- } else if (n == 3) {
- put_user_word(*(const short *) from, (short *) to);
- put_user_byte(*(2+(const char *) from), 2+(char *) to);
- return;
- } else if (n == 4) {
- put_user_long(*(const int *) from, (int *) to);
- return;
- }
-#if 0
-#define COMMON(x) \
-__asm__("cld\n\t" \
- "push %%es\n\t" \
- "push %%fs\n\t" \
- "pop %%es\n\t" \
- "rep ; movsl\n\t" \
- x \
- "pop %%es" \
- : /* no outputs */ \
- :"c" (n/4),"D" ((long) to),"S" ((long) from) \
- :"cx","di","si")
-
- switch (n % 4) {
- case 0:
- COMMON("");
- return;
- case 1:
- COMMON("movsb\n\t");
- return;
- case 2:
- COMMON("movsw\n\t");
- return;
- case 3:
- COMMON("movsw\n\tmovsb\n\t");
- return;
- }
-#undef COMMON
-#else
- __generic_memcpy_tofs(to,from,n);
+/* define constants */
+/* Address spaces (FC0-FC2) */
+#define USER_DATA (1)
+#ifndef USER_DS
+#define USER_DS (USER_DATA)
#endif
-}
-
-static inline void __generic_memcpy_fromfs(void * to, const void * from, unsigned long n)
-{
- if (n == 0) return;
- __asm__ __volatile__ ("1:\n\t"
- "movesb %1@+,d0\n\t"
- "moveb d0,%2@+\n\t"
- "dbra %0,1b\n\t"
- "clrw %0\n\t"
- "subql #1,%0\n\t"
- "bccs 1b"
- : "=d" (n), "=a" (from), "=a" (to)
- : "1" (from), "2" (to), "0" (n-1)
- : "d0", "memory");
-}
-
-static inline void __constant_memcpy_fromfs(void * to, const void * from, unsigned long n)
-{
- if (n == 0) {
- return;
- } else if (n == 1) {
- *(char *)to = get_user_byte((const char *) from);
- return;
- } else if (n == 2) {
- *(short *)to = get_user_word((const short *) from);
- return;
- } else if (n == 3) {
- *(short *) to = get_user_word((const short *) from);
- *(2+(char *) to) = get_user_byte(2+(const char *) from);
- return;
- } else if (n == 4) {
- *(int *) to = get_user_long((const int *) from);
- return;
- }
-#if 0
-#define COMMON(x) \
-__asm__("cld\n\t" \
- "rep ; fs ; movsl\n\t" \
- x \
- : /* no outputs */ \
- :"c" (n/4),"D" ((long) to),"S" ((long) from) \
- :"cx","di","si","memory")
-
- switch (n % 4) {
- case 0:
- COMMON("");
- return;
- case 1:
- COMMON("fs ; movsb");
- return;
- case 2:
- COMMON("fs ; movsw");
- return;
- case 3:
- COMMON("fs ; movsw\n\tfs ; movsb");
- return;
- }
-#undef COMMON
-#else
- __generic_memcpy_fromfs(to,from,n);
+#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)
-#define memcpy_fromfs(to, from, n) \
-(__builtin_constant_p(n) ? \
- __constant_memcpy_fromfs((to),(from),(n)) : \
- __generic_memcpy_fromfs((to),(from),(n)))
-
-#define memcpy_tofs(to, from, n) \
-(__builtin_constant_p(n) ? \
- __constant_memcpy_tofs((to),(from),(n)) : \
- __generic_memcpy_tofs((to),(from),(n)))
+#ifndef __ASSEMBLY__
/*
* Get/set the SFC/DFC registers for MOVES instructions
@@ -211,7 +24,7 @@ __asm__("cld\n\t" \
static inline unsigned long get_fs(void)
{
unsigned long _v;
- __asm__ ("movec dfc,%0":"=r" (_v):);
+ __asm__ ("movec %/dfc,%0":"=r" (_v):);
return _v;
}
@@ -219,23 +32,16 @@ static inline unsigned long get_fs(void)
static inline unsigned long get_ds(void)
{
/* return the supervisor data space code */
- return 0x5;
+ return KERNEL_DS;
}
static inline void set_fs(unsigned long val)
{
- __asm__ __volatile__ ("movec %0,sfc\n\t"
- "movec %0,dfc\n\t"
- : /* no outputs */ : "r" (val), "r" (val) : "memory");
+ __asm__ __volatile__ ("movec %0,%/sfc\n\t"
+ "movec %0,%/dfc\n\t"
+ : /* no outputs */ : "r" (val) : "memory");
}
-/* define constants */
-/* Address spaces (FC0-FC2) */
-#ifndef USER_DS
-#define USER_DS (1)
-#endif
-#ifndef KERNEL_DS
-#define KERNEL_DS (5)
-#endif
+#endif /* __ASSEMBLY__ */
#endif /* _M68K_SEGMENT_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 05:26:43 +0000