m68k: merge m68k and m68knommu arch directories

There is a lot of common code that could be shared between the m68k
and m68knommu arch branches. It makes sense to merge the two branches
into a single directory structure so that we can more easily share
that common code.

This is a brute force merge, based on a script from Stephen King
<sfking@fdwdc.com>, which was originally written by Arnd Bergmann
<arnd@arndb.de>.

> The script was inspired by the script Sam Ravnborg used to merge the
> includes from m68knommu. For those files common to both arches but
> differing in content, the m68k version of the file is renamed to
> <file>_mm.<ext> and the m68knommu version of the file is moved into the
> corresponding m68k directory and renamed <file>_no.<ext> and a small
> wrapper file <file>.<ext> is used to select between the two version. Files
> that are common to both but don't differ are removed from the m68knommu
> tree and files and directories that are unique to the m68knommu tree are
> moved to the m68k tree. Finally, the arch/m68knommu tree is removed.
>
> To select between the the versions of the files, the wrapper uses
>
> #ifdef CONFIG_MMU
> #include <file>_mm.<ext>
> #else
> #include <file>_no.<ext>
> #endif

On top of this file merge I have done a simplistic merge of m68k and
m68knommu Kconfig, which primarily attempts to keep existing options and
menus in place. Other than a handful of options being moved it produces
identical .config outputs on m68k and m68knommu targets I tested it on.

With this in place there is now quite a bit of scope for merge cleanups
in future patches.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

1 files changed, 5 insertions, 277 deletions

diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index 0b252683cefb..07a417550e94 100644
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -1,277 +1,5 @@
-/*
- *  linux/arch/m68k/kernel/ptrace.c
- *
- *  Copyright (C) 1994 by Hamish Macdonald
- *  Taken from linux/kernel/ptrace.c and modified for M680x0.
- *  linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file COPYING in the main directory of
- * this archive for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/signal.h>
-
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/* determines which bits in the SR the user has access to. */
-/* 1 = access 0 = no access */
-#define SR_MASK 0x001f
-
-/* sets the trace bits. */
-#define TRACE_BITS 0xC000
-#define T1_BIT 0x8000
-#define T0_BIT 0x4000
-
-/* Find the stack offset for a register, relative to thread.esp0. */
-#define PT_REG(reg)	((long)&((struct pt_regs *)0)->reg)
-#define SW_REG(reg)	((long)&((struct switch_stack *)0)->reg \
-			 - sizeof(struct switch_stack))
-/* Mapping from PT_xxx to the stack offset at which the register is
-   saved.  Notice that usp has no stack-slot and needs to be treated
-   specially (see get_reg/put_reg below). */
-static const int regoff[] = {
-	[0]	= PT_REG(d1),
-	[1]	= PT_REG(d2),
-	[2]	= PT_REG(d3),
-	[3]	= PT_REG(d4),
-	[4]	= PT_REG(d5),
-	[5]	= SW_REG(d6),
-	[6]	= SW_REG(d7),
-	[7]	= PT_REG(a0),
-	[8]	= PT_REG(a1),
-	[9]	= PT_REG(a2),
-	[10]	= SW_REG(a3),
-	[11]	= SW_REG(a4),
-	[12]	= SW_REG(a5),
-	[13]	= SW_REG(a6),
-	[14]	= PT_REG(d0),
-	[15]	= -1,
-	[16]	= PT_REG(orig_d0),
-	[17]	= PT_REG(sr),
-	[18]	= PT_REG(pc),
-};
-
-/*
- * Get contents of register REGNO in task TASK.
- */
-static inline long get_reg(struct task_struct *task, int regno)
-{
-	unsigned long *addr;
-
-	if (regno == PT_USP)
-		addr = &task->thread.usp;
-	else if (regno < ARRAY_SIZE(regoff))
-		addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
-	else
-		return 0;
-	/* Need to take stkadj into account. */
-	if (regno == PT_SR || regno == PT_PC) {
-		long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
-		addr = (unsigned long *) ((unsigned long)addr + stkadj);
-		/* The sr is actually a 16 bit register.  */
-		if (regno == PT_SR)
-			return *(unsigned short *)addr;
-	}
-	return *addr;
-}
-
-/*
- * Write contents of register REGNO in task TASK.
- */
-static inline int put_reg(struct task_struct *task, int regno,
-			  unsigned long data)
-{
-	unsigned long *addr;
-
-	if (regno == PT_USP)
-		addr = &task->thread.usp;
-	else if (regno < ARRAY_SIZE(regoff))
-		addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
-	else
-		return -1;
-	/* Need to take stkadj into account. */
-	if (regno == PT_SR || regno == PT_PC) {
-		long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
-		addr = (unsigned long *) ((unsigned long)addr + stkadj);
-		/* The sr is actually a 16 bit register.  */
-		if (regno == PT_SR) {
-			*(unsigned short *)addr = data;
-			return 0;
-		}
-	}
-	*addr = data;
-	return 0;
-}
-
-/*
- * Make sure the single step bit is not set.
- */
-static inline void singlestep_disable(struct task_struct *child)
-{
-	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
-	put_reg(child, PT_SR, tmp);
-	clear_tsk_thread_flag(child, TIF_DELAYED_TRACE);
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- */
-void ptrace_disable(struct task_struct *child)
-{
-	singlestep_disable(child);
-}
-
-void user_enable_single_step(struct task_struct *child)
-{
-	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
-	put_reg(child, PT_SR, tmp | T1_BIT);
-	set_tsk_thread_flag(child, TIF_DELAYED_TRACE);
-}
-
-void user_enable_block_step(struct task_struct *child)
-{
-	unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
-	put_reg(child, PT_SR, tmp | T0_BIT);
-}
-
-void user_disable_single_step(struct task_struct *child)
-{
-	singlestep_disable(child);
-}
-
-long arch_ptrace(struct task_struct *child, long request,
-		 unsigned long addr, unsigned long data)
-{
-	unsigned long tmp;
-	int i, ret = 0;
-	int regno = addr >> 2; /* temporary hack. */
-	unsigned long __user *datap = (unsigned long __user *) data;
-
-	switch (request) {
-	/* read the word at location addr in the USER area. */
-	case PTRACE_PEEKUSR:
-		if (addr & 3)
-			goto out_eio;
-
-		if (regno >= 0 && regno < 19) {
-			tmp = get_reg(child, regno);
-		} else if (regno >= 21 && regno < 49) {
-			tmp = child->thread.fp[regno - 21];
-			/* Convert internal fpu reg representation
-			 * into long double format
-			 */
-			if (FPU_IS_EMU && (regno < 45) && !(regno % 3))
-				tmp = ((tmp & 0xffff0000) << 15) |
-				      ((tmp & 0x0000ffff) << 16);
-		} else
-			goto out_eio;
-		ret = put_user(tmp, datap);
-		break;
-
-	case PTRACE_POKEUSR:
-	/* write the word at location addr in the USER area */
-		if (addr & 3)
-			goto out_eio;
-
-		if (regno == PT_SR) {
-			data &= SR_MASK;
-			data |= get_reg(child, PT_SR) & ~SR_MASK;
-		}
-		if (regno >= 0 && regno < 19) {
-			if (put_reg(child, regno, data))
-				goto out_eio;
-		} else if (regno >= 21 && regno < 48) {
-			/* Convert long double format
-			 * into internal fpu reg representation
-			 */
-			if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) {
-				data <<= 15;
-				data = (data & 0xffff0000) |
-				       ((data & 0x0000ffff) >> 1);
-			}
-			child->thread.fp[regno - 21] = data;
-		} else
-			goto out_eio;
-		break;
-
-	case PTRACE_GETREGS:	/* Get all gp regs from the child. */
-		for (i = 0; i < 19; i++) {
-			tmp = get_reg(child, i);
-			ret = put_user(tmp, datap);
-			if (ret)
-				break;
-			datap++;
-		}
-		break;
-
-	case PTRACE_SETREGS:	/* Set all gp regs in the child. */
-		for (i = 0; i < 19; i++) {
-			ret = get_user(tmp, datap);
-			if (ret)
-				break;
-			if (i == PT_SR) {
-				tmp &= SR_MASK;
-				tmp |= get_reg(child, PT_SR) & ~SR_MASK;
-			}
-			put_reg(child, i, tmp);
-			datap++;
-		}
-		break;
-
-	case PTRACE_GETFPREGS:	/* Get the child FPU state. */
-		if (copy_to_user(datap, &child->thread.fp,
-				 sizeof(struct user_m68kfp_struct)))
-			ret = -EFAULT;
-		break;
-
-	case PTRACE_SETFPREGS:	/* Set the child FPU state. */
-		if (copy_from_user(&child->thread.fp, datap,
-				   sizeof(struct user_m68kfp_struct)))
-			ret = -EFAULT;
-		break;
-
-	case PTRACE_GET_THREAD_AREA:
-		ret = put_user(task_thread_info(child)->tp_value, datap);
-		break;
-
-	default:
-		ret = ptrace_request(child, request, addr, data);
-		break;
-	}
-
-	return ret;
-out_eio:
-	return -EIO;
-}
-
-asmlinkage void syscall_trace(void)
-{
-	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-				 ? 0x80 : 0));
-	/*
-	 * this isn't the same as continuing with a signal, but it will do
-	 * for normal use.  strace only continues with a signal if the
-	 * stopping signal is not SIGTRAP.  -brl
-	 */
-	if (current->exit_code) {
-		send_sig(current->exit_code, current, 1);
-		current->exit_code = 0;
-	}
-}
+#ifdef CONFIG_MMU
+#include "ptrace_mm.c"
+#else
+#include "ptrace_no.c"
+#endif