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, 76 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/delay_no.h b/arch/m68k/include/asm/delay_no.h
new file mode 100644
index 00000000000..55cbd6294ab
--- /dev/null
+++ b/arch/m68k/include/asm/delay_no.h
@@ -0,0 +1,76 @@
+#ifndef _M68KNOMMU_DELAY_H
+#define _M68KNOMMU_DELAY_H
+
+/*
+ * Copyright (C) 1994 Hamish Macdonald
+ * Copyright (C) 2004 Greg Ungerer <gerg@snapgear.com>
+ */
+
+#include <asm/param.h>
+
+static inline void __delay(unsigned long loops)
+{
+#if defined(CONFIG_COLDFIRE)
+	/* The coldfire runs this loop at significantly different speeds
+	 * depending upon long word alignment or not.  We'll pad it to
+	 * long word alignment which is the faster version.
+	 * The 0x4a8e is of course a 'tstl %fp' instruction.  This is better
+	 * than using a NOP (0x4e71) instruction because it executes in one
+	 * cycle not three and doesn't allow for an arbitary delay waiting
+	 * for bus cycles to finish.  Also fp/a6 isn't likely to cause a
+	 * stall waiting for the register to become valid if such is added
+	 * to the coldfire at some stage.
+	 */
+	__asm__ __volatile__ (	".balignw 4, 0x4a8e\n\t"
+				"1: subql #1, %0\n\t"
+				"jcc 1b"
+		: "=d" (loops) : "0" (loops));
+#else
+	__asm__ __volatile__ (	"1: subql #1, %0\n\t"
+				"jcc 1b"
+		: "=d" (loops) : "0" (loops));
+#endif
+}
+
+/*
+ *	Ideally we use a 32*32->64 multiply to calculate the number of
+ *	loop iterations, but the older standard 68k and ColdFire do not
+ *	have this instruction. So for them we have a clsoe approximation
+ *	loop using 32*32->32 multiplies only. This calculation based on
+ *	the ARM version of delay.
+ *
+ *	We want to implement:
+ *
+ *	loops = (usecs * 0x10c6 * HZ * loops_per_jiffy) / 2^32
+ */
+
+#define	HZSCALE		(268435456 / (1000000/HZ))
+
+extern unsigned long loops_per_jiffy;
+
+static inline void _udelay(unsigned long usecs)
+{
+#if defined(CONFIG_M68328) || defined(CONFIG_M68EZ328) || \
+    defined(CONFIG_M68VZ328) || defined(CONFIG_M68360) || \
+    defined(CONFIG_COLDFIRE)
+	__delay((((usecs * HZSCALE) >> 11) * (loops_per_jiffy >> 11)) >> 6);
+#else
+	unsigned long tmp;
+
+	usecs *= 4295;		/* 2**32 / 1000000 */
+	__asm__ ("mulul %2,%0:%1"
+		: "=d" (usecs), "=d" (tmp)
+		: "d" (usecs), "1" (loops_per_jiffy*HZ));
+	__delay(usecs);
+#endif
+}
+
+/*
+ *	Moved the udelay() function into library code, no longer inlined.
+ *	I had to change the algorithm because we are overflowing now on
+ *	the faster ColdFire parts. The code is a little bigger, so it makes
+ *	sense to library it.
+ */
+extern void udelay(unsigned long usecs);
+
+#endif /* defined(_M68KNOMMU_DELAY_H) */