m68k: merge mmu and non-mmu include/asm/entry.h files

The changes in the mmu version of entry.h (entry_mm.h) and the non-mmu
version (entry_no.h) are not about the presence or use of an MMU at all.
The main changes are to support the ColdFire processors. The code for
trap entry and exit for all types of 68k processor outside coldfire is
the same.

So merge the files back to a single entry.h and share the common 68k
entry/exit code. Some changes are required for the non-mmu entry
handlers to adopt the differing macros for system call and interrupt
entry, but this is quite strait forward. The changes for the ColdFire
remove a couple of instructions for the separate a7 register case, and
are no worse for the older single a7 register case.

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

1 files changed, 0 insertions, 128 deletions

diff --git a/arch/m68k/include/asm/entry_mm.h b/arch/m68k/include/asm/entry_mm.h
deleted file mode 100644
index 73b8c8f..0000000
--- a/arch/m68k/include/asm/entry_mm.h
+++ /dev/null
@@ -1,128 +0,0 @@
-#ifndef __M68K_ENTRY_H
-#define __M68K_ENTRY_H
-
-#include <asm/setup.h>
-#include <asm/page.h>
-#ifdef __ASSEMBLY__
-#include <asm/thread_info.h>
-#endif
-
-/*
- * 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
- *	2E(sp) - pc
- *	32(sp) - format & vector
- */
-
-/*
- * 97/05/14 Andreas: Register %a2 is now set to the current task throughout
- *		     the whole kernel.
- */
-
-/* the following macro is used when enabling interrupts */
-#if defined(MACH_ATARI_ONLY)
-	/* block out HSYNC on the atari */
-#define ALLOWINT	(~0x400)
-#define	MAX_NOINT_IPL	3
-#else
-	/* portable version */
-#define ALLOWINT	(~0x700)
-#define	MAX_NOINT_IPL	0
-#endif /* machine compilation types */
-
-#ifdef __ASSEMBLY__
-
-#define curptr a2
-
-LFLUSH_I_AND_D = 0x00000808
-
-#define SAVE_ALL_INT save_all_int
-#define SAVE_ALL_SYS save_all_sys
-#define RESTORE_ALL restore_all
-/*
- * This defines the normal kernel pt-regs layout.
- *
- * regs a3-a6 and d6-d7 are preserved by C code
- * the kernel doesn't mess with usp unless it needs to
- */
-
-/*
- * a -1 in the orig_d0 field signifies
- * that the stack frame is NOT for syscall
- */
-.macro	save_all_int
-	clrl	%sp@-		| stk_adj
-	pea	-1:w		| orig d0
-	movel	%d0,%sp@-	| d0
-	moveml	%d1-%d5/%a0-%a1/%curptr,%sp@-
-.endm
-
-.macro	save_all_sys
-	clrl	%sp@-		| stk_adj
-	movel	%d0,%sp@-	| orig d0
-	movel	%d0,%sp@-	| d0
-	moveml	%d1-%d5/%a0-%a1/%curptr,%sp@-
-.endm
-
-.macro	restore_all
-	moveml	%sp@+,%a0-%a1/%curptr/%d1-%d5
-	movel	%sp@+,%d0
-	addql	#4,%sp		| orig d0
-	addl	%sp@+,%sp	| stk adj
-	rte
-.endm
-
-#define SWITCH_STACK_SIZE (6*4+4)	/* includes return address */
-
-#define SAVE_SWITCH_STACK save_switch_stack
-#define RESTORE_SWITCH_STACK restore_switch_stack
-#define GET_CURRENT(tmp) get_current tmp
-
-.macro	save_switch_stack
-	moveml	%a3-%a6/%d6-%d7,%sp@-
-.endm
-
-.macro	restore_switch_stack
-	moveml	%sp@+,%a3-%a6/%d6-%d7
-.endm
-
-.macro	get_current reg=%d0
-	movel	%sp,\reg
-	andw	#-THREAD_SIZE,\reg
-	movel	\reg,%curptr
-	movel	%curptr@,%curptr
-.endm
-
-#else /* C source */
-
-#define STR(X) STR1(X)
-#define STR1(X) #X
-
-#define SAVE_ALL_INT				\
-	"clrl	%%sp@-;"    /* stk_adj */	\
-	"pea	-1:w;"	    /* orig d0 = -1 */	\
-	"movel	%%d0,%%sp@-;" /* d0 */		\
-	"moveml	%%d1-%%d5/%%a0-%%a2,%%sp@-"
-#define GET_CURRENT(tmp) \
-	"movel	%%sp,"#tmp"\n\t" \
-	"andw	#-"STR(THREAD_SIZE)","#tmp"\n\t" \
-	"movel	"#tmp",%%a2\n\t" \
-	"movel	%%a2@,%%a2"
-
-#endif
-
-#endif /* __M68K_ENTRY_H */