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, 182 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/entry_no.h b/arch/m68k/include/asm/entry_no.h
new file mode 100644
index 000000000000..c2553d26273d
--- /dev/null
+++ b/arch/m68k/include/asm/entry_no.h
@@ -0,0 +1,182 @@
+#ifndef __M68KNOMMU_ENTRY_H
+#define __M68KNOMMU_ENTRY_H
+
+#include <asm/setup.h>
+#include <asm/page.h>
+
+/*
+ * Stack layout in 'ret_from_exception':
+ *
+ * This allows access to the syscall arguments in registers d1-d5
+ *
+ *	 0(sp) - d1
+ *	 4(sp) - d2
+ *	 8(sp) - d3
+ *	 C(sp) - d4
+ *	10(sp) - d5
+ *	14(sp) - a0
+ *	18(sp) - a1
+ *	1C(sp) - a2
+ *	20(sp) - d0
+ *	24(sp) - orig_d0
+ *	28(sp) - stack adjustment
+ *	2C(sp) - [ sr              ] [ format & vector ]
+ *	2E(sp) - [ pc-hiword       ] [ sr              ]
+ *	30(sp) - [ pc-loword       ] [ pc-hiword       ]
+ *	32(sp) - [ format & vector ] [ pc-loword       ]
+ *		  ^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^^^^^^^
+ *			M68K		  COLDFIRE
+ */
+
+#define ALLOWINT 0xf8ff
+
+#ifdef __ASSEMBLY__
+
+/* process bits for task_struct.flags */
+PF_TRACESYS_OFF = 3
+PF_TRACESYS_BIT = 5
+PF_PTRACED_OFF = 3
+PF_PTRACED_BIT = 4
+PF_DTRACE_OFF = 1
+PF_DTRACE_BIT = 5
+
+LENOSYS = 38
+
+#define SWITCH_STACK_SIZE (6*4+4)	/* Includes return address */
+
+/*
+ * This defines the normal kernel pt-regs layout.
+ *
+ * regs are a2-a6 and d6-d7 preserved by C code
+ * the kernel doesn't mess with usp unless it needs to
+ */
+
+#ifdef CONFIG_COLDFIRE
+/*
+ * This is made a little more tricky on the ColdFire. There is no
+ * separate kernel and user stack pointers. Need to artificially
+ * construct a usp in software... When doing this we need to disable
+ * interrupts, otherwise bad things could happen.
+ */
+.macro SAVE_ALL
+	move	#0x2700,%sr		/* disable intrs */
+	btst	#5,%sp@(2)		/* from user? */
+	bnes	6f			/* no, skip */
+	movel	%sp,sw_usp		/* save user sp */
+	addql	#8,sw_usp		/* remove exception */
+	movel	sw_ksp,%sp		/* kernel sp */
+	subql	#8,%sp			/* room for exception */
+	clrl	%sp@-			/* stkadj */
+	movel	%d0,%sp@-		/* orig d0 */
+	movel	%d0,%sp@-		/* d0 */
+	lea	%sp@(-32),%sp		/* space for 8 regs */
+	moveml	%d1-%d5/%a0-%a2,%sp@
+	movel	sw_usp,%a0		/* get usp */
+	movel	%a0@-,%sp@(PT_PC)	/* copy exception program counter */
+	movel	%a0@-,%sp@(PT_FORMATVEC)/* copy exception format/vector/sr */
+	bra	7f
+	6:
+	clrl	%sp@-			/* stkadj */
+	movel	%d0,%sp@-		/* orig d0 */
+	movel	%d0,%sp@-		/* d0 */
+	lea	%sp@(-32),%sp		/* space for 8 regs */
+	moveml	%d1-%d5/%a0-%a2,%sp@
+	7:
+.endm
+
+.macro RESTORE_ALL
+	btst	#5,%sp@(PT_SR)		/* going user? */
+	bnes	8f			/* no, skip */
+	move	#0x2700,%sr		/* disable intrs */
+	movel	sw_usp,%a0		/* get usp */
+	movel	%sp@(PT_PC),%a0@-	/* copy exception program counter */
+	movel	%sp@(PT_FORMATVEC),%a0@-/* copy exception format/vector/sr */
+	moveml	%sp@,%d1-%d5/%a0-%a2
+	lea	%sp@(32),%sp		/* space for 8 regs */
+	movel	%sp@+,%d0
+	addql	#4,%sp			/* orig d0 */
+	addl	%sp@+,%sp		/* stkadj */
+	addql	#8,%sp			/* remove exception */
+	movel	%sp,sw_ksp		/* save ksp */
+	subql	#8,sw_usp		/* set exception */
+	movel	sw_usp,%sp		/* restore usp */
+	rte
+	8:
+	moveml	%sp@,%d1-%d5/%a0-%a2
+	lea	%sp@(32),%sp		/* space for 8 regs */
+	movel	%sp@+,%d0
+	addql	#4,%sp			/* orig d0 */
+	addl	%sp@+,%sp		/* stkadj */
+	rte
+.endm
+
+/*
+ * Quick exception save, use current stack only.
+ */
+.macro SAVE_LOCAL
+	move	#0x2700,%sr		/* disable intrs */
+	clrl	%sp@-			/* stkadj */
+	movel	%d0,%sp@-		/* orig d0 */
+	movel	%d0,%sp@-		/* d0 */
+	lea	%sp@(-32),%sp		/* space for 8 regs */
+	moveml	%d1-%d5/%a0-%a2,%sp@
+.endm
+
+.macro RESTORE_LOCAL
+	moveml	%sp@,%d1-%d5/%a0-%a2
+	lea	%sp@(32),%sp		/* space for 8 regs */
+	movel	%sp@+,%d0
+	addql	#4,%sp			/* orig d0 */
+	addl	%sp@+,%sp		/* stkadj */
+	rte
+.endm
+
+.macro SAVE_SWITCH_STACK
+	lea	%sp@(-24),%sp		/* 6 regs */
+	moveml	%a3-%a6/%d6-%d7,%sp@
+.endm
+
+.macro RESTORE_SWITCH_STACK
+	moveml	%sp@,%a3-%a6/%d6-%d7
+	lea	%sp@(24),%sp		/* 6 regs */
+.endm
+
+/*
+ * Software copy of the user and kernel stack pointers... Ugh...
+ * Need these to get around ColdFire not having separate kernel
+ * and user stack pointers.
+ */
+.globl sw_usp
+.globl sw_ksp
+
+#else /* !CONFIG_COLDFIRE */
+
+/*
+ * Standard 68k interrupt entry and exit macros.
+ */
+.macro SAVE_ALL
+	clrl	%sp@-			/* stkadj */
+	movel	%d0,%sp@-		/* orig d0 */
+	movel	%d0,%sp@-		/* d0 */
+	moveml	%d1-%d5/%a0-%a2,%sp@-
+.endm
+
+.macro RESTORE_ALL
+	moveml	%sp@+,%a0-%a2/%d1-%d5
+	movel	%sp@+,%d0
+	addql	#4,%sp			/* orig d0 */
+	addl	%sp@+,%sp		/* stkadj */
+	rte
+.endm
+
+.macro SAVE_SWITCH_STACK
+	moveml	%a3-%a6/%d6-%d7,%sp@-
+.endm
+
+.macro RESTORE_SWITCH_STACK
+	moveml	%sp@+,%a3-%a6/%d6-%d7
+.endm
+
+#endif /* !CONFIG_COLDFIRE */
+#endif /* __ASSEMBLY__ */
+#endif /* __M68KNOMMU_ENTRY_H */