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>

45 files changed, 8714 insertions, 5212 deletions

diff --git a/arch/m68k/kernel/Makefile b/arch/m68k/kernel/Makefile
index 55d5d6b680a..c482ebc9dd5 100644
--- a/arch/m68k/kernel/Makefile
+++ b/arch/m68k/kernel/Makefile
@@ -1,17 +1,5 @@
-#
-# Makefile for the linux kernel.
-#
-
-ifndef CONFIG_SUN3
-  extra-y := head.o
+ifdef CONFIG_MMU
+include arch/m68k/kernel/Makefile_mm
 else
-  extra-y := sun3-head.o
+include arch/m68k/kernel/Makefile_no
 endif
-extra-y	+= vmlinux.lds
-
-obj-y	:= entry.o process.o traps.o ints.o signal.o ptrace.o module.o \
-	   sys_m68k.o time.o setup.o m68k_ksyms.o devres.o
-
-devres-y = ../../../kernel/irq/devres.o
-
-obj-y$(CONFIG_MMU_SUN3) += dma.o	# no, it's not a typo
diff --git a/arch/m68k/kernel/Makefile_mm b/arch/m68k/kernel/Makefile_mm
new file mode 100644
index 00000000000..55d5d6b680a
--- /dev/null
+++ b/arch/m68k/kernel/Makefile_mm
@@ -0,0 +1,17 @@
+#
+# Makefile for the linux kernel.
+#
+
+ifndef CONFIG_SUN3
+  extra-y := head.o
+else
+  extra-y := sun3-head.o
+endif
+extra-y	+= vmlinux.lds
+
+obj-y	:= entry.o process.o traps.o ints.o signal.o ptrace.o module.o \
+	   sys_m68k.o time.o setup.o m68k_ksyms.o devres.o
+
+devres-y = ../../../kernel/irq/devres.o
+
+obj-y$(CONFIG_MMU_SUN3) += dma.o	# no, it's not a typo
diff --git a/arch/m68k/kernel/Makefile_no b/arch/m68k/kernel/Makefile_no
new file mode 100644
index 00000000000..37c3fc074c0
--- /dev/null
+++ b/arch/m68k/kernel/Makefile_no
@@ -0,0 +1,10 @@
+#
+# Makefile for arch/m68knommu/kernel.
+#
+
+extra-y := vmlinux.lds
+
+obj-y += dma.o entry.o init_task.o irq.o m68k_ksyms.o process.o ptrace.o \
+	 setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o
+
+obj-$(CONFIG_MODULES)	+= module.o
diff --git a/arch/m68k/kernel/asm-offsets.c b/arch/m68k/kernel/asm-offsets.c
index 78e59b82ebc..59a69a5c62f 100644
--- a/arch/m68k/kernel/asm-offsets.c
+++ b/arch/m68k/kernel/asm-offsets.c
@@ -1,100 +1,5 @@
-/*
- * This program is used to generate definitions needed by
- * assembly language modules.
- *
- * We use the technique used in the OSF Mach kernel code:
- * generate asm statements containing #defines,
- * compile this file to assembler, and then extract the
- * #defines from the assembly-language output.
- */
-
-#define ASM_OFFSETS_C
-
-#include <linux/stddef.h>
-#include <linux/sched.h>
-#include <linux/kernel_stat.h>
-#include <linux/kbuild.h>
-#include <asm/bootinfo.h>
-#include <asm/irq.h>
-#include <asm/amigahw.h>
-#include <linux/font.h>
-
-int main(void)
-{
-	/* offsets into the task struct */
-	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
-	DEFINE(TASK_INFO, offsetof(struct task_struct, thread.info));
-	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
 #ifdef CONFIG_MMU
-	DEFINE(TASK_TINFO, offsetof(struct task_struct, thread.info));
+#include "asm-offsets_mm.c"
+#else
+#include "asm-offsets_no.c"
 #endif
-
-	/* offsets into the thread struct */
-	DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
-	DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
-	DEFINE(THREAD_SR, offsetof(struct thread_struct, sr));
-	DEFINE(THREAD_FS, offsetof(struct thread_struct, fs));
-	DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp));
-	DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
-	DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp));
-	DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl));
-	DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate));
-
-	/* offsets into the thread_info struct */
-	DEFINE(TINFO_PREEMPT, offsetof(struct thread_info, preempt_count));
-	DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags));
-
-	/* offsets into the pt_regs */
-	DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0));
-	DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0));
-	DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1));
-	DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2));
-	DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3));
-	DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4));
-	DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5));
-	DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0));
-	DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1));
-	DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2));
-	DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc));
-	DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr));
-	/* bitfields are a bit difficult */
-	DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4);
-
-	/* offsets into the irq_cpustat_t struct */
-	DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending));
-
-	/* offsets into the bi_record struct */
-	DEFINE(BIR_TAG, offsetof(struct bi_record, tag));
-	DEFINE(BIR_SIZE, offsetof(struct bi_record, size));
-	DEFINE(BIR_DATA, offsetof(struct bi_record, data));
-
-	/* offsets into font_desc (drivers/video/console/font.h) */
-	DEFINE(FONT_DESC_IDX, offsetof(struct font_desc, idx));
-	DEFINE(FONT_DESC_NAME, offsetof(struct font_desc, name));
-	DEFINE(FONT_DESC_WIDTH, offsetof(struct font_desc, width));
-	DEFINE(FONT_DESC_HEIGHT, offsetof(struct font_desc, height));
-	DEFINE(FONT_DESC_DATA, offsetof(struct font_desc, data));
-	DEFINE(FONT_DESC_PREF, offsetof(struct font_desc, pref));
-
-	/* signal defines */
-	DEFINE(LSIGSEGV, SIGSEGV);
-	DEFINE(LSEGV_MAPERR, SEGV_MAPERR);
-	DEFINE(LSIGTRAP, SIGTRAP);
-	DEFINE(LTRAP_TRACE, TRAP_TRACE);
-
-	/* offsets into the custom struct */
-	DEFINE(CUSTOMBASE, &amiga_custom);
-	DEFINE(C_INTENAR, offsetof(struct CUSTOM, intenar));
-	DEFINE(C_INTREQR, offsetof(struct CUSTOM, intreqr));
-	DEFINE(C_INTENA, offsetof(struct CUSTOM, intena));
-	DEFINE(C_INTREQ, offsetof(struct CUSTOM, intreq));
-	DEFINE(C_SERDATR, offsetof(struct CUSTOM, serdatr));
-	DEFINE(C_SERDAT, offsetof(struct CUSTOM, serdat));
-	DEFINE(C_SERPER, offsetof(struct CUSTOM, serper));
-	DEFINE(CIAABASE, &ciaa);
-	DEFINE(CIABBASE, &ciab);
-	DEFINE(C_PRA, offsetof(struct CIA, pra));
-	DEFINE(ZTWOBASE, zTwoBase);
-
-	return 0;
-}
diff --git a/arch/m68k/kernel/asm-offsets_mm.c b/arch/m68k/kernel/asm-offsets_mm.c
new file mode 100644
index 00000000000..78e59b82ebc
--- /dev/null
+++ b/arch/m68k/kernel/asm-offsets_mm.c
@@ -0,0 +1,100 @@
+/*
+ * This program is used to generate definitions needed by
+ * assembly language modules.
+ *
+ * We use the technique used in the OSF Mach kernel code:
+ * generate asm statements containing #defines,
+ * compile this file to assembler, and then extract the
+ * #defines from the assembly-language output.
+ */
+
+#define ASM_OFFSETS_C
+
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/kbuild.h>
+#include <asm/bootinfo.h>
+#include <asm/irq.h>
+#include <asm/amigahw.h>
+#include <linux/font.h>
+
+int main(void)
+{
+	/* offsets into the task struct */
+	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
+	DEFINE(TASK_INFO, offsetof(struct task_struct, thread.info));
+	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
+#ifdef CONFIG_MMU
+	DEFINE(TASK_TINFO, offsetof(struct task_struct, thread.info));
+#endif
+
+	/* offsets into the thread struct */
+	DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
+	DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
+	DEFINE(THREAD_SR, offsetof(struct thread_struct, sr));
+	DEFINE(THREAD_FS, offsetof(struct thread_struct, fs));
+	DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp));
+	DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
+	DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp));
+	DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl));
+	DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate));
+
+	/* offsets into the thread_info struct */
+	DEFINE(TINFO_PREEMPT, offsetof(struct thread_info, preempt_count));
+	DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags));
+
+	/* offsets into the pt_regs */
+	DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0));
+	DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0));
+	DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1));
+	DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2));
+	DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3));
+	DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4));
+	DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5));
+	DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0));
+	DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1));
+	DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2));
+	DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc));
+	DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr));
+	/* bitfields are a bit difficult */
+	DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4);
+
+	/* offsets into the irq_cpustat_t struct */
+	DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending));
+
+	/* offsets into the bi_record struct */
+	DEFINE(BIR_TAG, offsetof(struct bi_record, tag));
+	DEFINE(BIR_SIZE, offsetof(struct bi_record, size));
+	DEFINE(BIR_DATA, offsetof(struct bi_record, data));
+
+	/* offsets into font_desc (drivers/video/console/font.h) */
+	DEFINE(FONT_DESC_IDX, offsetof(struct font_desc, idx));
+	DEFINE(FONT_DESC_NAME, offsetof(struct font_desc, name));
+	DEFINE(FONT_DESC_WIDTH, offsetof(struct font_desc, width));
+	DEFINE(FONT_DESC_HEIGHT, offsetof(struct font_desc, height));
+	DEFINE(FONT_DESC_DATA, offsetof(struct font_desc, data));
+	DEFINE(FONT_DESC_PREF, offsetof(struct font_desc, pref));
+
+	/* signal defines */
+	DEFINE(LSIGSEGV, SIGSEGV);
+	DEFINE(LSEGV_MAPERR, SEGV_MAPERR);
+	DEFINE(LSIGTRAP, SIGTRAP);
+	DEFINE(LTRAP_TRACE, TRAP_TRACE);
+
+	/* offsets into the custom struct */
+	DEFINE(CUSTOMBASE, &amiga_custom);
+	DEFINE(C_INTENAR, offsetof(struct CUSTOM, intenar));
+	DEFINE(C_INTREQR, offsetof(struct CUSTOM, intreqr));
+	DEFINE(C_INTENA, offsetof(struct CUSTOM, intena));
+	DEFINE(C_INTREQ, offsetof(struct CUSTOM, intreq));
+	DEFINE(C_SERDATR, offsetof(struct CUSTOM, serdatr));
+	DEFINE(C_SERDAT, offsetof(struct CUSTOM, serdat));
+	DEFINE(C_SERPER, offsetof(struct CUSTOM, serper));
+	DEFINE(CIAABASE, &ciaa);
+	DEFINE(CIABBASE, &ciab);
+	DEFINE(C_PRA, offsetof(struct CIA, pra));
+	DEFINE(ZTWOBASE, zTwoBase);
+
+	return 0;
+}
diff --git a/arch/m68k/kernel/asm-offsets_no.c b/arch/m68k/kernel/asm-offsets_no.c
new file mode 100644
index 00000000000..ffe02f41ad4
--- /dev/null
+++ b/arch/m68k/kernel/asm-offsets_no.c
@@ -0,0 +1,76 @@
+/*
+ * This program is used to generate definitions needed by
+ * assembly language modules.
+ *
+ * We use the technique used in the OSF Mach kernel code:
+ * generate asm statements containing #defines,
+ * compile this file to assembler, and then extract the
+ * #defines from the assembly-language output.
+ */
+
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/ptrace.h>
+#include <linux/hardirq.h>
+#include <linux/kbuild.h>
+#include <asm/bootinfo.h>
+#include <asm/irq.h>
+#include <asm/thread_info.h>
+
+int main(void)
+{
+	/* offsets into the task struct */
+	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
+	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
+
+	/* offsets into the irq_cpustat_t struct */
+	DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending));
+
+	/* offsets into the thread struct */
+	DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
+	DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
+	DEFINE(THREAD_SR, offsetof(struct thread_struct, sr));
+	DEFINE(THREAD_FS, offsetof(struct thread_struct, fs));
+	DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp));
+	DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
+	DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp));
+	DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl));
+	DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate));
+
+	/* offsets into the pt_regs */
+	DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0));
+	DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0));
+	DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1));
+	DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2));
+	DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3));
+	DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4));
+	DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5));
+	DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0));
+	DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1));
+	DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2));
+	DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc));
+	DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr));
+
+#ifdef CONFIG_COLDFIRE
+	/* bitfields are a bit difficult */
+	DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, sr) - 2);
+#else
+	/* bitfields are a bit difficult */
+	DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4);
+#endif
+
+	/* signal defines */
+	DEFINE(SIGSEGV, SIGSEGV);
+	DEFINE(SEGV_MAPERR, SEGV_MAPERR);
+	DEFINE(SIGTRAP, SIGTRAP);
+	DEFINE(TRAP_TRACE, TRAP_TRACE);
+
+	DEFINE(PT_PTRACED, PT_PTRACED);
+
+	/* Offsets in thread_info structure */
+	DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
+	DEFINE(TI_PREEMPTCOUNT, offsetof(struct thread_info, preempt_count));
+
+	return 0;
+}
diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c
index 4bbb3c2a888..90e8cb726c8 100644
--- a/arch/m68k/kernel/dma.c
+++ b/arch/m68k/kernel/dma.c
@@ -1,130 +1,5 @@
-/*
- * 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.
- */
-
-#undef DEBUG
-
-#include <linux/dma-mapping.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include <asm/pgalloc.h>
-
-void *dma_alloc_coherent(struct device *dev, size_t size,
-			 dma_addr_t *handle, gfp_t flag)
-{
-	struct page *page, **map;
-	pgprot_t pgprot;
-	void *addr;
-	int i, order;
-
-	pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
-
-	size = PAGE_ALIGN(size);
-	order = get_order(size);
-
-	page = alloc_pages(flag, order);
-	if (!page)
-		return NULL;
-
-	*handle = page_to_phys(page);
-	map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
-	if (!map) {
-		__free_pages(page, order);
-		return NULL;
-	}
-	split_page(page, order);
-
-	order = 1 << order;
-	size >>= PAGE_SHIFT;
-	map[0] = page;
-	for (i = 1; i < size; i++)
-		map[i] = page + i;
-	for (; i < order; i++)
-		__free_page(page + i);
-	pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
-	if (CPU_IS_040_OR_060)
-		pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
-	else
-		pgprot_val(pgprot) |= _PAGE_NOCACHE030;
-	addr = vmap(map, size, VM_MAP, pgprot);
-	kfree(map);
-
-	return addr;
-}
-EXPORT_SYMBOL(dma_alloc_coherent);
-
-void dma_free_coherent(struct device *dev, size_t size,
-		       void *addr, dma_addr_t handle)
-{
-	pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
-	vfree(addr);
-}
-EXPORT_SYMBOL(dma_free_coherent);
-
-void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
-				size_t size, enum dma_data_direction dir)
-{
-	switch (dir) {
-	case DMA_TO_DEVICE:
-		cache_push(handle, size);
-		break;
-	case DMA_FROM_DEVICE:
-		cache_clear(handle, size);
-		break;
-	default:
-		if (printk_ratelimit())
-			printk("dma_sync_single_for_device: unsupported dir %u\n", dir);
-		break;
-	}
-}
-EXPORT_SYMBOL(dma_sync_single_for_device);
-
-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
-			    enum dma_data_direction dir)
-{
-	int i;
-
-	for (i = 0; i < nents; sg++, i++)
-		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
-}
-EXPORT_SYMBOL(dma_sync_sg_for_device);
-
-dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
-			  enum dma_data_direction dir)
-{
-	dma_addr_t handle = virt_to_bus(addr);
-
-	dma_sync_single_for_device(dev, handle, size, dir);
-	return handle;
-}
-EXPORT_SYMBOL(dma_map_single);
-
-dma_addr_t dma_map_page(struct device *dev, struct page *page,
-			unsigned long offset, size_t size,
-			enum dma_data_direction dir)
-{
-	dma_addr_t handle = page_to_phys(page) + offset;
-
-	dma_sync_single_for_device(dev, handle, size, dir);
-	return handle;
-}
-EXPORT_SYMBOL(dma_map_page);
-
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-	       enum dma_data_direction dir)
-{
-	int i;
-
-	for (i = 0; i < nents; sg++, i++) {
-		sg->dma_address = sg_phys(sg);
-		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
-	}
-	return nents;
-}
-EXPORT_SYMBOL(dma_map_sg);
+#ifdef CONFIG_MMU
+#include "dma_mm.c"
+#else
+#include "dma_no.c"
+#endif
diff --git a/arch/m68k/kernel/dma_mm.c b/arch/m68k/kernel/dma_mm.c
new file mode 100644
index 00000000000..4bbb3c2a888
--- /dev/null
+++ b/arch/m68k/kernel/dma_mm.c
@@ -0,0 +1,130 @@
+/*
+ * 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.
+ */
+
+#undef DEBUG
+
+#include <linux/dma-mapping.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <asm/pgalloc.h>
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+			 dma_addr_t *handle, gfp_t flag)
+{
+	struct page *page, **map;
+	pgprot_t pgprot;
+	void *addr;
+	int i, order;
+
+	pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
+
+	size = PAGE_ALIGN(size);
+	order = get_order(size);
+
+	page = alloc_pages(flag, order);
+	if (!page)
+		return NULL;
+
+	*handle = page_to_phys(page);
+	map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
+	if (!map) {
+		__free_pages(page, order);
+		return NULL;
+	}
+	split_page(page, order);
+
+	order = 1 << order;
+	size >>= PAGE_SHIFT;
+	map[0] = page;
+	for (i = 1; i < size; i++)
+		map[i] = page + i;
+	for (; i < order; i++)
+		__free_page(page + i);
+	pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
+	if (CPU_IS_040_OR_060)
+		pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
+	else
+		pgprot_val(pgprot) |= _PAGE_NOCACHE030;
+	addr = vmap(map, size, VM_MAP, pgprot);
+	kfree(map);
+
+	return addr;
+}
+EXPORT_SYMBOL(dma_alloc_coherent);
+
+void dma_free_coherent(struct device *dev, size_t size,
+		       void *addr, dma_addr_t handle)
+{
+	pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
+	vfree(addr);
+}
+EXPORT_SYMBOL(dma_free_coherent);
+
+void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
+				size_t size, enum dma_data_direction dir)
+{
+	switch (dir) {
+	case DMA_TO_DEVICE:
+		cache_push(handle, size);
+		break;
+	case DMA_FROM_DEVICE:
+		cache_clear(handle, size);
+		break;
+	default:
+		if (printk_ratelimit())
+			printk("dma_sync_single_for_device: unsupported dir %u\n", dir);
+		break;
+	}
+}
+EXPORT_SYMBOL(dma_sync_single_for_device);
+
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
+			    enum dma_data_direction dir)
+{
+	int i;
+
+	for (i = 0; i < nents; sg++, i++)
+		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
+}
+EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
+			  enum dma_data_direction dir)
+{
+	dma_addr_t handle = virt_to_bus(addr);
+
+	dma_sync_single_for_device(dev, handle, size, dir);
+	return handle;
+}
+EXPORT_SYMBOL(dma_map_single);
+
+dma_addr_t dma_map_page(struct device *dev, struct page *page,
+			unsigned long offset, size_t size,
+			enum dma_data_direction dir)
+{
+	dma_addr_t handle = page_to_phys(page) + offset;
+
+	dma_sync_single_for_device(dev, handle, size, dir);
+	return handle;
+}
+EXPORT_SYMBOL(dma_map_page);
+
+int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+	       enum dma_data_direction dir)
+{
+	int i;
+
+	for (i = 0; i < nents; sg++, i++) {
+		sg->dma_address = sg_phys(sg);
+		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
+	}
+	return nents;
+}
+EXPORT_SYMBOL(dma_map_sg);
diff --git a/arch/m68k/kernel/dma_no.c b/arch/m68k/kernel/dma_no.c
new file mode 100644
index 00000000000..fc61541aeb7
--- /dev/null
+++ b/arch/m68k/kernel/dma_no.c
@@ -0,0 +1,74 @@
+/*
+ * Dynamic DMA mapping support.
+ *
+ * We never have any address translations to worry about, so this
+ * is just alloc/free.
+ */
+
+#include <linux/types.h>
+#include <linux/gfp.h>
+#include <linux/mm.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <asm/cacheflush.h>
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+			   dma_addr_t *dma_handle, gfp_t gfp)
+{
+	void *ret;
+	/* ignore region specifiers */
+	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+
+	if (dev == NULL || (*dev->dma_mask < 0xffffffff))
+		gfp |= GFP_DMA;
+	ret = (void *)__get_free_pages(gfp, get_order(size));
+
+	if (ret != NULL) {
+		memset(ret, 0, size);
+		*dma_handle = virt_to_phys(ret);
+	}
+	return ret;
+}
+
+void dma_free_coherent(struct device *dev, size_t size,
+			 void *vaddr, dma_addr_t dma_handle)
+{
+	free_pages((unsigned long)vaddr, get_order(size));
+}
+
+void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
+				size_t size, enum dma_data_direction dir)
+{
+	switch (dir) {
+	case DMA_TO_DEVICE:
+		flush_dcache_range(handle, size);
+		break;
+	case DMA_FROM_DEVICE:
+		/* Should be clear already */
+		break;
+	default:
+		if (printk_ratelimit())
+			printk("dma_sync_single_for_device: unsupported dir %u\n", dir);
+		break;
+	}
+}
+
+EXPORT_SYMBOL(dma_sync_single_for_device);
+dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
+			  enum dma_data_direction dir)
+{
+	dma_addr_t handle = virt_to_phys(addr);
+	flush_dcache_range(handle, size);
+	return handle;
+}
+EXPORT_SYMBOL(dma_map_single);
+
+dma_addr_t dma_map_page(struct device *dev, struct page *page,
+			unsign