m68k,m68knommu: merge header files

Merge header files for m68k and m68knommu to the single location:

    arch/m68k/include/asm

The majority of this patch was the result of the
script that is included in the changelog below.

The script was originally written by Arnd Bergman and
exten by me to cover a few more files.

When the header files differed the script uses the following:

The original m68k file is named <file>_mm.h  [mm for memory manager]
The m68knommu file is named <file>_no.h [no for no memory manager]

The files uses the following include guard:

This include gaurd works as the m68knommu toolchain set
the __uClinux__ symbol - so this should work in userspace too.

Merging the header files for m68k and m68knommu exposes the
(unexpected?) ABI differences thus it is easier to actually
identify these and thus to fix them.

The commit has been build tested with both a m68k and
a m68knommu toolchain - with success.

The commit has also been tested with "make headers_check"
and this patch fixes make headers_check for m68knommu.

The script used:
TARGET=arch/m68k/include/asm
SOURCE=arch/m68knommu/include/asm

INCLUDE="cachectl.h errno.h fcntl.h hwtest.h ioctls.h ipcbuf.h \
linkage.h math-emu.h md.h mman.h movs.h msgbuf.h openprom.h \
oplib.h poll.h posix_types.h resource.h rtc.h sembuf.h shmbuf.h \
shm.h shmparam.h socket.h sockios.h spinlock.h statfs.h stat.h \
termbits.h termios.h tlb.h types.h user.h"

EQUAL="auxvec.h cputime.h device.h emergency-restart.h futex.h \
ioctl.h irq_regs.h kdebug.h local.h mutex.h percpu.h \
sections.h topology.h"

NOMUUFILES="anchor.h bootstd.h coldfire.h commproc.h dbg.h \
elia.h flat.h m5206sim.h m520xsim.h m523xsim.h m5249sim.h \
m5272sim.h m527xsim.h m528xsim.h m5307sim.h m532xsim.h \
m5407sim.h m68360_enet.h m68360.h m68360_pram.h m68360_quicc.h \
m68360_regs.h MC68328.h MC68332.h MC68EZ328.h MC68VZ328.h \
mcfcache.h mcfdma.h mcfmbus.h mcfne.h mcfpci.h mcfpit.h \
mcfsim.h mcfsmc.h mcftimer.h mcfuart.h mcfwdebug.h \
nettel.h quicc_simple.h smp.h"

FILES="atomic.h bitops.h bootinfo.h bug.h bugs.h byteorder.h cache.h \
cacheflush.h checksum.h current.h delay.h div64.h \
dma-mapping.h dma.h elf.h entry.h fb.h fpu.h hardirq.h hw_irq.h io.h \
irq.h kmap_types.h machdep.h mc146818rtc.h mmu.h mmu_context.h \
module.h page.h page_offset.h param.h pci.h pgalloc.h \
pgtable.h processor.h ptrace.h scatterlist.h segment.h \
setup.h sigcontext.h siginfo.h signal.h string.h system.h swab.h \
thread_info.h timex.h tlbflush.h traps.h uaccess.h ucontext.h \
unaligned.h unistd.h"

mergefile() {
	BASE=${1%.h}
	git mv ${SOURCE}/$1 ${TARGET}/${BASE}_no.h
	git mv ${TARGET}/$1 ${TARGET}/${BASE}_mm.h

cat << EOF > ${TARGET}/$1
EOF

	git add ${TARGET}/$1
}

set -e

mkdir -p ${TARGET}

git mv include/asm-m68k/* ${TARGET}
rmdir include/asm-m68k

git rm ${SOURCE}/Kbuild
for F in $INCLUDE $EQUAL; do
	git rm ${SOURCE}/$F
done

for F in $NOMUUFILES; do
	git mv ${SOURCE}/$F ${TARGET}/$F
done

for F in $FILES ; do
	mergefile $F
done

rmdir arch/m68knommu/include/asm
rmdir arch/m68knommu/include

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

1 files changed, 181 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/uaccess_no.h b/arch/m68k/include/asm/uaccess_no.h
new file mode 100644
index 00000000000..68bbe9b312f
--- /dev/null
+++ b/arch/m68k/include/asm/uaccess_no.h
@@ -0,0 +1,181 @@
+#ifndef __M68KNOMMU_UACCESS_H
+#define __M68KNOMMU_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+
+#include <asm/segment.h>
+
+#define VERIFY_READ     0
+#define VERIFY_WRITE    1
+
+#define access_ok(type,addr,size)       _access_ok((unsigned long)(addr),(size))
+
+/*
+ * It is not enough to just have access_ok check for a real RAM address.
+ * This would disallow the case of code/ro-data running XIP in flash/rom.
+ * Ideally we would check the possible flash ranges too, but that is
+ * currently not so easy.
+ */
+static inline int _access_ok(unsigned long addr, unsigned long size)
+{
+        return 1;
+}
+
+/*
+ * The exception table consists of pairs of addresses: the first is the
+ * address of an instruction that is allowed to fault, and the second is
+ * the address at which the program should continue.  No registers are
+ * modified, so it is entirely up to the continuation code to figure out
+ * what to do.
+ *
+ * All the routines below use bits of fixup code that are out of line
+ * with the main instruction path.  This means when everything is well,
+ * we don't even have to jump over them.  Further, they do not intrude
+ * on our cache or tlb entries.
+ */
+
+struct exception_table_entry
+{
+        unsigned long insn, fixup;
+};
+
+/* Returns 0 if exception not found and fixup otherwise.  */
+extern unsigned long search_exception_table(unsigned long);
+
+
+/*
+ * These are the main single-value transfer routines.  They automatically
+ * use the right size if we just have the right pointer type.
+ */
+
+#define put_user(x, ptr)                                \
+({                                                      \
+    int __pu_err = 0;                                   \
+    typeof(*(ptr)) __pu_val = (x);                      \
+    switch (sizeof (*(ptr))) {                          \
+    case 1:                                             \
+        __put_user_asm(__pu_err, __pu_val, ptr, b);     \
+        break;                                          \
+    case 2:                                             \
+        __put_user_asm(__pu_err, __pu_val, ptr, w);     \
+        break;                                          \
+    case 4:                                             \
+        __put_user_asm(__pu_err, __pu_val, ptr, l);     \
+        break;                                          \
+    case 8:                                             \
+        memcpy(ptr, &__pu_val, sizeof (*(ptr))); \
+        break;                                          \
+    default:                                            \
+        __pu_err = __put_user_bad();                    \
+        break;                                          \
+    }                                                   \
+    __pu_err;                                           \
+})
+#define __put_user(x, ptr) put_user(x, ptr)
+
+extern int __put_user_bad(void);
+
+/*
+ * Tell gcc we read from memory instead of writing: this is because
+ * we do not write to any memory gcc knows about, so there are no
+ * aliasing issues.
+ */
+
+#define __ptr(x) ((unsigned long *)(x))
+
+#define __put_user_asm(err,x,ptr,bwl)                           \
+        __asm__ ("move" #bwl " %0,%1"                           \
+                : /* no outputs */                                              \
+                :"d" (x),"m" (*__ptr(ptr)) : "memory")
+
+#define get_user(x, ptr)                                        \
+({                                                              \
+    int __gu_err = 0;                                           \
+    typeof(x) __gu_val = 0;                                     \
+    switch (sizeof(*(ptr))) {                                   \
+    case 1:                                                     \
+        __get_user_asm(__gu_err, __gu_val, ptr, b, "=d");       \
+        break;                                                  \
+    case 2:                                                     \
+        __get_user_asm(__gu_err, __gu_val, ptr, w, "=r");       \
+        break;                                                  \
+    case 4:                                                     \
+        __get_user_asm(__gu_err, __gu_val, ptr, l, "=r");       \
+        break;                                                  \
+    case 8:                                                     \
+        memcpy((void *) &__gu_val, ptr, sizeof (*(ptr)));       \
+        break;                                                  \
+    default:                                                    \
+        __gu_val = 0;                                           \
+        __gu_err = __get_user_bad();                            \
+        break;                                                  \
+    }                                                           \
+    (x) = (typeof(*(ptr))) __gu_val;                            \
+    __gu_err;                                                   \
+})
+#define __get_user(x, ptr) get_user(x, ptr)
+
+extern int __get_user_bad(void);
+
+#define __get_user_asm(err,x,ptr,bwl,reg)                       \
+        __asm__ ("move" #bwl " %1,%0"                           \
+                 : "=d" (x)                                     \
+                 : "m" (*__ptr(ptr)))
+
+#define copy_from_user(to, from, n)             (memcpy(to, from, n), 0)
+#define copy_to_user(to, from, n)               (memcpy(to, from, n), 0)
+
+#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
+#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+#define copy_to_user_ret(to,from,n,retval) ({ if (copy_to_user(to,from,n)) return retval; })
+
+#define copy_from_user_ret(to,from,n,retval) ({ if (copy_from_user(to,from,n)) return retval; })
+
+/*
+ * Copy a null terminated string from userspace.
+ */
+
+static inline long
+strncpy_from_user(char *dst, const char *src, long count)
+{
+        char *tmp;
+        strncpy(dst, src, count);
+        for (tmp = dst; *tmp && count > 0; tmp++, count--)
+                ;
+        return(tmp - dst); /* DAVIDM should we count a NUL ?  check getname */
+}
+
+/*
+ * Return the size of a string (including the ending 0)
+ *
+ * Return 0 on exception, a value greater than N if too long
+ */
+static inline long strnlen_user(const char *src, long n)
+{
+        return(strlen(src) + 1); /* DAVIDM make safer */
+}
+
+#define strlen_user(str) strnlen_user(str, 32767)
+
+/*
+ * Zero Userspace
+ */
+
+static inline unsigned long
+__clear_user(void *to, unsigned long n)
+{
+        memset(to, 0, n);
+        return 0;
+}
+
+#define clear_user(to,n)        __clear_user(to,n)
+
+#endif /* _M68KNOMMU_UACCESS_H */