Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/geert/linux-m68k

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k/block: amiflop - Remove superfluous amiga_chip_alloc() cast
  m68k/atari: ARAnyM - Add support for network access
  m68k/atari: ARAnyM - Add support for console access
  m68k/atari: ARAnyM - Add support for block access
  m68k/atari: Initial ARAnyM support
  m68k: Kconfig - Remove unneeded "default n"
  m68k: Makefiles - Change to new flags variables
  m68k/amiga: Reclaim Chip RAM for PPC exception handlers
  m68k: Allow all kernel traps to be handled via exception fixups
  m68k: Use base_trap_init() to initialize vectors
  m68k: Add helper function handle_kernel_fault()

arch/m68k/Kconfig

@@ -18,11 +18,9 @@ config RWSEM_XCHGADD_ALGORITHM
 
 config ARCH_HAS_ILOG2_U32
 	bool
-	default n
 
 config ARCH_HAS_ILOG2_U64
 	bool
-	default n
 
 config GENERIC_HWEIGHT
 	bool
@@ -242,6 +240,37 @@ config SUN3
 
 	  If you don't want to compile a kernel exclusively for a Sun 3, say N.
 
+config NATFEAT
+	bool "ARAnyM emulator support"
+	depends on ATARI
+	help
+	  This option enables support for ARAnyM native features, such as
+	  access to a disk image as /dev/hda.
+
+config NFBLOCK
+	tristate "NatFeat block device support"
+	depends on BLOCK && NATFEAT
+	help
+	  Say Y to include support for the ARAnyM NatFeat block device
+	  which allows direct access to the hard drives without using
+	  the hardware emulation.
+
+config NFCON
+	tristate "NatFeat console driver"
+	depends on NATFEAT
+	help
+	  Say Y to include support for the ARAnyM NatFeat console driver
+	  which allows the console output to be redirected to the stderr
+	  output of ARAnyM.
+
+config NFETH
+	tristate "NatFeat Ethernet support"
+	depends on NET_ETHERNET && NATFEAT
+	help
+	  Say Y to include support for the ARAnyM NatFeat network device
+	  which will emulate a regular ethernet device while presenting an
+	  ethertap device to the host system.
+
 comment "Processor type"
 
 config M68020

arch/m68k/Makefile

@@ -76,6 +76,7 @@ core-$(CONFIG_MVME16x)		+= arch/m68k/mvme16x/
 core-$(CONFIG_BVME6000)		+= arch/m68k/bvme6000/
 core-$(CONFIG_SUN3X)		+= arch/m68k/sun3x/	arch/m68k/sun3/
 core-$(CONFIG_SUN3)		+= arch/m68k/sun3/	arch/m68k/sun3/prom/
+core-$(CONFIG_NATFEAT)		+= arch/m68k/emu/
 core-$(CONFIG_M68040)		+= arch/m68k/fpsp040/
 core-$(CONFIG_M68060)		+= arch/m68k/ifpsp060/
 core-$(CONFIG_M68KFPU_EMU)	+= arch/m68k/math-emu/

arch/m68k/amiga/chipram.c

@@ -33,10 +33,6 @@ void __init amiga_chip_init(void)
     if (!AMIGAHW_PRESENT(CHIP_RAM))
 	return;
 
-    /*
-     *  Remove the first 4 pages where PPC exception handlers will be located
-     */
-    amiga_chip_size -= 0x4000;
     chipram_res.end = amiga_chip_size-1;
     request_resource(&iomem_resource, &chipram_res);
 

arch/m68k/emu/Makefile

@@ -0,0 +1,9 @@
+#
+# Makefile for Linux arch/m68k/emu source directory
+#
+
+obj-y			+= natfeat.o
+
+obj-$(CONFIG_NFBLOCK)	+= nfblock.o
+obj-$(CONFIG_NFCON)	+= nfcon.o
+obj-$(CONFIG_NFETH)	+= nfeth.o

arch/m68k/emu/natfeat.c

@@ -0,0 +1,78 @@
+/*
+ * natfeat.c - ARAnyM hardware support via Native Features (natfeats)
+ *
+ * Copyright (c) 2005 Petr Stehlik of ARAnyM dev team
+ *
+ * Reworked for Linux by Roman Zippel <[email protected]>
+ *
+ * This software may be used and distributed according to the terms of
+ * the GNU General Public License (GPL), incorporated herein by reference.
+ */
+
+#include <linux/types.h>
+#include <linux/console.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <asm/machdep.h>
+#include <asm/natfeat.h>
+
+asm("\n"
+"	.global nf_get_id,nf_call\n"
+"nf_get_id:\n"
+"	.short	0x7300\n"
+"	rts\n"
+"nf_call:\n"
+"	.short	0x7301\n"
+"	rts\n"
+"1:	moveq.l	#0,%d0\n"
+"	rts\n"
+"	.section __ex_table,\"a\"\n"
+"	.long	nf_get_id,1b\n"
+"	.long	nf_call,1b\n"
+"	.previous");
+EXPORT_SYMBOL_GPL(nf_get_id);
+EXPORT_SYMBOL_GPL(nf_call);
+
+void nfprint(const char *fmt, ...)
+{
+	static char buf[256];
+	va_list ap;
+	int n;
+
+	va_start(ap, fmt);
+	n = vsnprintf(buf, 256, fmt, ap);
+	nf_call(nf_get_id("NF_STDERR"), buf);
+	va_end(ap);
+}
+
+static void nf_poweroff(void)
+{
+	long id = nf_get_id("NF_SHUTDOWN");
+
+	if (id)
+		nf_call(id);
+}
+
+void nf_init(void)
+{
+	unsigned long id, version;
+	char buf[256];
+
+	id = nf_get_id("NF_VERSION");
+	if (!id)
+		return;
+	version = nf_call(id);
+
+	id = nf_get_id("NF_NAME");
+	if (!id)
+		return;
+	nf_call(id, buf, 256);
+	buf[255] = 0;
+
+	pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
+		version & 0xffff);
+
+	mach_power_off = nf_poweroff;
+}

arch/m68k/emu/nfblock.c

@@ -0,0 +1,195 @@
+/*
+ * ARAnyM block device driver
+ *
+ * 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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/genhd.h>
+#include <linux/blkdev.h>
+#include <linux/hdreg.h>
+#include <linux/slab.h>
+
+#include <asm/natfeat.h>
+
+static long nfhd_id;
+
+enum {
+	/* emulation entry points */
+	NFHD_READ_WRITE = 10,
+	NFHD_GET_CAPACITY = 14,
+
+	/* skip ACSI devices */
+	NFHD_DEV_OFFSET = 8,
+};
+
+static inline s32 nfhd_read_write(u32 major, u32 minor, u32 rwflag, u32 recno,
+				  u32 count, u32 buf)
+{
+	return nf_call(nfhd_id + NFHD_READ_WRITE, major, minor, rwflag, recno,
+		       count, buf);
+}
+
+static inline s32 nfhd_get_capacity(u32 major, u32 minor, u32 *blocks,
+				    u32 *blocksize)
+{
+	return nf_call(nfhd_id + NFHD_GET_CAPACITY, major, minor, blocks,
+		       blocksize);
+}
+
+static LIST_HEAD(nfhd_list);
+
+static int major_num;
+module_param(major_num, int, 0);
+
+struct nfhd_device {
+	struct list_head list;
+	int id;
+	u32 blocks, bsize;
+	int bshift;
+	struct request_queue *queue;
+	struct gendisk *disk;
+};
+
+static int nfhd_make_request(struct request_queue *queue, struct bio *bio)
+{
+	struct nfhd_device *dev = queue->queuedata;
+	struct bio_vec *bvec;
+	int i, dir, len, shift;
+	sector_t sec = bio->bi_sector;
+
+	dir = bio_data_dir(bio);
+	shift = dev->bshift;
+	bio_for_each_segment(bvec, bio, i) {
+		len = bvec->bv_len;
+		len >>= 9;
+		nfhd_read_write(dev->id, 0, dir, sec >> shift, len >> shift,
+				bvec_to_phys(bvec));
+		sec += len;
+	}
+	bio_endio(bio, 0);
+	return 0;
+}
+
+static int nfhd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+	struct nfhd_device *dev = bdev->bd_disk->private_data;
+
+	geo->cylinders = dev->blocks >> (6 - dev->bshift);
+	geo->heads = 4;
+	geo->sectors = 16;
+
+	return 0;
+}
+
+static const struct block_device_operations nfhd_ops = {
+	.owner	= THIS_MODULE,
+	.getgeo	= nfhd_getgeo,
+};
+
+static int __init nfhd_init_one(int id, u32 blocks, u32 bsize)
+{
+	struct nfhd_device *dev;
+	int dev_id = id - NFHD_DEV_OFFSET;
+
+	pr_info("nfhd%u: found device with %u blocks (%u bytes)\n", dev_id,
+		blocks, bsize);
+
+	if (bsize < 512 || (bsize & (bsize - 1))) {
+		pr_warn("nfhd%u: invalid block size\n", dev_id);
+		return -EINVAL;
+	}
+
+	dev = kmalloc(sizeof(struct nfhd_device), GFP_KERNEL);
+	if (!dev)
+		goto out;
+
+	dev->id = id;
+	dev->blocks = blocks;
+	dev->bsize = bsize;
+	dev->bshift = ffs(bsize) - 10;
+
+	dev->queue = blk_alloc_queue(GFP_KERNEL);
+	if (dev->queue == NULL)
+		goto free_dev;
+
+	dev->queue->queuedata = dev;
+	blk_queue_make_request(dev->queue, nfhd_make_request);
+	blk_queue_logical_block_size(dev->queue, bsize);
+
+	dev->disk = alloc_disk(16);
+	if (!dev->disk)
+		goto free_queue;
+
+	dev->disk->major = major_num;
+	dev->disk->first_minor = dev_id * 16;
+	dev->disk->fops = &nfhd_ops;
+	dev->disk->private_data = dev;
+	sprintf(dev->disk->disk_name, "nfhd%u", dev_id);
+	set_capacity(dev->disk, (sector_t)blocks * (bsize / 512));
+	dev->disk->queue = dev->queue;
+
+	add_disk(dev->disk);
+
+	list_add_tail(&dev->list, &nfhd_list);
+
+	return 0;
+
+free_queue:
+	blk_cleanup_queue(dev->queue);
+free_dev:
+	kfree(dev);
+out:
+	return -ENOMEM;
+}
+
+static int __init nfhd_init(void)
+{
+	u32 blocks, bsize;
+	int i;
+
+	nfhd_id = nf_get_id("XHDI");
+	if (!nfhd_id)
+		return -ENODEV;
+
+	major_num = register_blkdev(major_num, "nfhd");
+	if (major_num <= 0) {
+		pr_warn("nfhd: unable to get major number\n");
+		return major_num;
+	}
+
+	for (i = NFHD_DEV_OFFSET; i < 24; i++) {
+		if (nfhd_get_capacity(i, 0, &blocks, &bsize))
+			continue;
+		nfhd_init_one(i, blocks, bsize);
+	}
+
+	return 0;
+}
+
+static void __exit nfhd_exit(void)
+{
+	struct nfhd_device *dev, *next;
+
+	list_for_each_entry_safe(dev, next, &nfhd_list, list) {
+		list_del(&dev->list);
+		del_gendisk(dev->disk);
+		put_disk(dev->disk);
+		blk_cleanup_queue(dev->queue);
+		kfree(dev);
+	}
+	unregister_blkdev(major_num, "nfhd");
+}
+
+module_init(nfhd_init);
+module_exit(nfhd_exit);
+
+MODULE_LICENSE("GPL");