[PATCH] CRIS update: new subarchitecture v32

New CRIS sub architecture named v32.

From: Dave Jones <davej@redhat.com>

	Fix swapped kmalloc args

Signed-off-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 455 insertions, 0 deletions

diff --git a/arch/cris/arch-v32/drivers/axisflashmap.c b/arch/cris/arch-v32/drivers/axisflashmap.c
new file mode 100644
index 00000000000..78ed52b1cda
--- /dev/null
+++ b/arch/cris/arch-v32/drivers/axisflashmap.c
@@ -0,0 +1,455 @@
+/*
+ * Physical mapping layer for MTD using the Axis partitiontable format
+ *
+ * Copyright (c) 2001, 2002, 2003 Axis Communications AB
+ *
+ * This file is under the GPL.
+ *
+ * First partition is always sector 0 regardless of if we find a partitiontable
+ * or not. In the start of the next sector, there can be a partitiontable that
+ * tells us what other partitions to define. If there isn't, we use a default
+ * partition split defined below.
+ *
+ * Copy of os/lx25/arch/cris/arch-v10/drivers/axisflashmap.c 1.5
+ * with minor changes.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/config.h>
+#include <linux/init.h>
+
+#include <linux/mtd/concat.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/mtdram.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/arch/hwregs/config_defs.h>
+#include <asm/axisflashmap.h>
+#include <asm/mmu.h>
+
+#define MEM_CSE0_SIZE (0x04000000)
+#define MEM_CSE1_SIZE (0x04000000)
+
+#define FLASH_UNCACHED_ADDR  KSEG_E
+#define FLASH_CACHED_ADDR    KSEG_F
+
+#if CONFIG_ETRAX_FLASH_BUSWIDTH==1
+#define flash_data __u8
+#elif CONFIG_ETRAX_FLASH_BUSWIDTH==2
+#define flash_data __u16
+#elif CONFIG_ETRAX_FLASH_BUSWIDTH==4
+#define flash_data __u16
+#endif
+
+/* From head.S */
+extern unsigned long romfs_start, romfs_length, romfs_in_flash;
+
+/* The master mtd for the entire flash. */
+struct mtd_info* axisflash_mtd = NULL;
+
+/* Map driver functions. */
+
+static map_word flash_read(struct map_info *map, unsigned long ofs)
+{
+	map_word tmp;
+	tmp.x[0] = *(flash_data *)(map->map_priv_1 + ofs);
+	return tmp;
+}
+
+static void flash_copy_from(struct map_info *map, void *to,
+			    unsigned long from, ssize_t len)
+{
+	memcpy(to, (void *)(map->map_priv_1 + from), len);
+}
+
+static void flash_write(struct map_info *map, map_word d, unsigned long adr)
+{
+	*(flash_data *)(map->map_priv_1 + adr) = (flash_data)d.x[0];
+}
+
+/*
+ * The map for chip select e0.
+ *
+ * We run into tricky coherence situations if we mix cached with uncached
+ * accesses to we only use the uncached version here.
+ *
+ * The size field is the total size where the flash chips may be mapped on the
+ * chip select. MTD probes should find all devices there and it does not matter
+ * if there are unmapped gaps or aliases (mirrors of flash devices). The MTD
+ * probes will ignore them.
+ *
+ * The start address in map_priv_1 is in virtual memory so we cannot use
+ * MEM_CSE0_START but must rely on that FLASH_UNCACHED_ADDR is the start
+ * address of cse0.
+ */
+static struct map_info map_cse0 = {
+	.name = "cse0",
+	.size = MEM_CSE0_SIZE,
+	.bankwidth = CONFIG_ETRAX_FLASH_BUSWIDTH,
+	.read = flash_read,
+	.copy_from = flash_copy_from,
+	.write = flash_write,
+	.map_priv_1 = FLASH_UNCACHED_ADDR
+};
+
+/*
+ * The map for chip select e1.
+ *
+ * If there was a gap between cse0 and cse1, map_priv_1 would get the wrong
+ * address, but there isn't.
+ */
+static struct map_info map_cse1 = {
+	.name = "cse1",
+	.size = MEM_CSE1_SIZE,
+	.bankwidth = CONFIG_ETRAX_FLASH_BUSWIDTH,
+	.read = flash_read,
+	.copy_from = flash_copy_from,
+	.write = flash_write,
+	.map_priv_1 = FLASH_UNCACHED_ADDR + MEM_CSE0_SIZE
+};
+
+/* If no partition-table was found, we use this default-set. */
+#define MAX_PARTITIONS         7
+#define NUM_DEFAULT_PARTITIONS 3
+
+/*
+ * Default flash size is 2MB. CONFIG_ETRAX_PTABLE_SECTOR is most likely the
+ * size of one flash block and "filesystem"-partition needs 5 blocks to be able
+ * to use JFFS.
+ */
+static struct mtd_partition axis_default_partitions[NUM_DEFAULT_PARTITIONS] = {
+	{
+		.name = "boot firmware",
+		.size = CONFIG_ETRAX_PTABLE_SECTOR,
+		.offset = 0
+	},
+	{
+		.name = "kernel",
+		.size = 0x200000 - (6 * CONFIG_ETRAX_PTABLE_SECTOR),
+		.offset = CONFIG_ETRAX_PTABLE_SECTOR
+	},
+	{
+		.name = "filesystem",
+		.size = 5 * CONFIG_ETRAX_PTABLE_SECTOR,
+		.offset = 0x200000 - (5 * CONFIG_ETRAX_PTABLE_SECTOR)
+	}
+};
+
+/* Initialize the ones normally used. */
+static struct mtd_partition axis_partitions[MAX_PARTITIONS] = {
+	{
+		.name = "part0",
+		.size = CONFIG_ETRAX_PTABLE_SECTOR,
+		.offset = 0
+	},
+	{
+		.name = "part1",
+		.size = 0,
+		.offset = 0
+	},
+	{
+		.name = "part2",
+		.size = 0,
+		.offset = 0
+	},
+	{
+		.name = "part3",
+		.size = 0,
+		.offset = 0
+	},
+	{
+		.name = "part4",
+		.size = 0,
+		.offset = 0
+	},
+	{
+		.name = "part5",
+		.size = 0,
+		.offset = 0
+	},
+	{
+		.name = "part6",
+		.size = 0,
+		.offset = 0
+	},
+};
+
+/*
+ * Probe a chip select for AMD-compatible (JEDEC) or CFI-compatible flash
+ * chips in that order (because the amd_flash-driver is faster).
+ */
+static struct mtd_info *probe_cs(struct map_info *map_cs)
+{
+	struct mtd_info *mtd_cs = NULL;
+
+	printk(KERN_INFO
+	       "%s: Probing a 0x%08lx bytes large window at 0x%08lx.\n",
+	       map_cs->name, map_cs->size, map_cs->map_priv_1);
+
+#ifdef CONFIG_MTD_AMDSTD
+	mtd_cs = do_map_probe("amd_flash", map_cs);
+#endif
+#ifdef CONFIG_MTD_CFI
+	if (!mtd_cs) {
+		mtd_cs = do_map_probe("cfi_probe", map_cs);
+	}
+#endif
+
+	return mtd_cs;
+}
+
+/*
+ * Probe each chip select individually for flash chips. If there are chips on
+ * both cse0 and cse1, the mtd_info structs will be concatenated to one struct
+ * so that MTD partitions can cross chip boundries.
+ *
+ * The only known restriction to how you can mount your chips is that each
+ * chip select must hold similar flash chips. But you need external hardware
+ * to do that anyway and you can put totally different chips on cse0 and cse1
+ * so it isn't really much of a restriction.
+ */
+extern struct mtd_info* __init crisv32_nand_flash_probe (void);
+static struct mtd_info *flash_probe(void)
+{
+	struct mtd_info *mtd_cse0;
+	struct mtd_info *mtd_cse1;
+	struct mtd_info *mtd_nand = NULL;
+	struct mtd_info *mtd_total;
+	struct mtd_info *mtds[3];
+	int count = 0;
+
+	if ((mtd_cse0 = probe_cs(&map_cse0)) != NULL)
+		mtds[count++] = mtd_cse0;
+	if ((mtd_cse1 = probe_cs(&map_cse1)) != NULL)
+		mtds[count++] = mtd_cse1;
+
+#ifdef CONFIG_ETRAX_NANDFLASH
+	if ((mtd_nand = crisv32_nand_flash_probe()) != NULL)
+		mtds[count++] = mtd_nand;
+#endif
+
+	if (!mtd_cse0 && !mtd_cse1 && !mtd_nand) {
+		/* No chip found. */
+		return NULL;
+	}
+
+	if (count > 1) {
+#ifdef CONFIG_MTD_CONCAT
+		/* Since the concatenation layer adds a small overhead we
+		 * could try to figure out if the chips in cse0 and cse1 are
+		 * identical and reprobe the whole cse0+cse1 window. But since
+		 * flash chips are slow, the overhead is relatively small.
+		 * So we use the MTD concatenation layer instead of further
+		 * complicating the probing procedure.
+		 */
+		mtd_total = mtd_concat_create(mtds,
+		                              count,
+		                              "cse0+cse1+nand");
+#else
+		printk(KERN_ERR "%s and %s: Cannot concatenate due to kernel "
+		       "(mis)configuration!\n", map_cse0.name, map_cse1.name);
+		mtd_toal = NULL;
+#endif
+		if (!mtd_total) {
+			printk(KERN_ERR "%s and %s: Concatenation failed!\n",
+			       map_cse0.name, map_cse1.name);
+
+			/* The best we can do now is to only use what we found
+			 * at cse0.
+			 */
+			mtd_total = mtd_cse0;
+			map_destroy(mtd_cse1);
+		}
+	} else {
+		mtd_total = mtd_cse0? mtd_cse0 : mtd_cse1 ? mtd_cse1 : mtd_nand;
+
+	}
+
+	return mtd_total;
+}
+
+extern unsigned long crisv32_nand_boot;
+extern unsigned long crisv32_nand_cramfs_offset;
+
+/*
+ * Probe the flash chip(s) and, if it succeeds, read the partition-table
+ * and register the partitions with MTD.
+ */
+static int __init init_axis_flash(void)
+{
+	struct mtd_info *mymtd;
+	int err = 0;
+	int pidx = 0;
+	struct partitiontable_head *ptable_head = NULL;
+	struct partitiontable_entry *ptable;
+	int use_default_ptable = 1; /* Until proven otherwise. */
+	const char *pmsg = KERN_INFO "  /dev/flash%d at 0x%08x, size 0x%08x\n";
+	static char page[512];
+	size_t len;
+
+#ifndef CONFIG_ETRAXFS_SIM
+	mymtd = flash_probe();
+	mymtd->read(mymtd, CONFIG_ETRAX_PTABLE_SECTOR, 512, &len, page);
+	ptable_head = (struct partitiontable_head *)(page + PARTITION_TABLE_OFFSET);
+
+	if (!mymtd) {
+		/* There's no reason to use this module if no flash chip can
+		 * be identified. Make sure that's understood.
+		 */
+		printk(KERN_INFO "axisflashmap: Found no flash chip.\n");
+	} else {
+		printk(KERN_INFO "%s: 0x%08x bytes of flash memory.\n",
+		       mymtd->name, mymtd->size);
+		axisflash_mtd = mymtd;
+	}
+
+	if (mymtd) {
+		mymtd->owner = THIS_MODULE;
+	}
+	pidx++;  /* First partition is always set to the default. */
+
+	if (ptable_head && (ptable_head->magic == PARTITION_TABLE_MAGIC)
+	    && (ptable_head->size <
+		(MAX_PARTITIONS * sizeof(struct partitiontable_entry) +
+		PARTITIONTABLE_END_MARKER_SIZE))
+	    && (*(unsigned long*)((void*)ptable_head + sizeof(*ptable_head) +
+				  ptable_head->size -
+				  PARTITIONTABLE_END_MARKER_SIZE)
+		== PARTITIONTABLE_END_MARKER)) {
+		/* Looks like a start, sane length and end of a
+		 * partition table, lets check csum etc.
+		 */
+		int ptable_ok = 0;
+		struct partitiontable_entry *max_addr =
+			(struct partitiontable_entry *)
+			((unsigned long)ptable_head + sizeof(*ptable_head) +
+			 ptable_head->size);
+		unsigned long offset = CONFIG_ETRAX_PTABLE_SECTOR;
+		unsigned char *p;
+		unsigned long csum = 0;
+
+		ptable = (struct partitiontable_entry *)
+			((unsigned long)ptable_head + sizeof(*ptable_head));
+
+		/* Lets be PARANOID, and check the checksum. */
+		p = (unsigned char*) ptable;
+
+		while (p <= (unsigned char*)max_addr) {
+			csum += *p++;
+			csum += *p++;
+			csum += *p++;
+			csum += *p++;
+		}
+		ptable_ok = (csum == ptable_head->checksum);
+
+		/* Read the entries and use/show the info.  */
+		printk(KERN_INFO " Found a%s partition table at 0x%p-0x%p.\n",
+		       (ptable_ok ? " valid" : "n invalid"), ptable_head,
+		       max_addr);
+
+		/* We have found a working bootblock.  Now read the
+		 * partition table.  Scan the table.  It ends when
+		 * there is 0xffffffff, that is, empty flash.
+		 */
+		while (ptable_ok
+		       && ptable->offset != 0xffffffff
+		       && ptable < max_addr
+		       && pidx < MAX_PARTITIONS) {
+
+			axis_partitions[pidx].offset = offset + ptable->offset + (crisv32_nand_boot ? 16384 : 0);
+			axis_partitions[pidx].size = ptable->size;
+
+			printk(pmsg, pidx, axis_partitions[pidx].offset,
+			       axis_partitions[pidx].size);
+			pidx++;
+			ptable++;
+		}
+		use_default_ptable = !ptable_ok;
+	}
+
+	if (romfs_in_flash) {
+		/* Add an overlapping device for the root partition (romfs). */
+
+		axis_partitions[pidx].name = "romfs";
+		if (crisv32_nand_boot) {
+			char* data = kmalloc(1024, GFP_KERNEL);
+			int len;
+			int offset = crisv32_nand_cramfs_offset & ~(1024-1);
+			char* tmp;
+
+			mymtd->read(mymtd, offset, 1024, &len, data);
+			tmp = &data[crisv32_nand_cramfs_offset % 512];
+			axis_partitions[pidx].size = *(unsigned*)(tmp + 4);
+			axis_partitions[pidx].offset = crisv32_nand_cramfs_offset;
+			kfree(data);
+		} else {
+			axis_partitions[pidx].size = romfs_length;
+			axis_partitions[pidx].offset = romfs_start - FLASH_CACHED_ADDR;
+		}
+
+		axis_partitions[pidx].mask_flags |= MTD_WRITEABLE;
+
+		printk(KERN_INFO
+                       " Adding readonly flash partition for romfs image:\n");
+		printk(pmsg, pidx, axis_partitions[pidx].offset,
+		       axis_partitions[pidx].size);
+		pidx++;
+	}
+
+        if (mymtd) {
+		if (use_default_ptable) {
+			printk(KERN_INFO " Using default partition table.\n");
+			err = add_mtd_partitions(mymtd, axis_default_partitions,
+						 NUM_DEFAULT_PARTITIONS);
+		} else {
+			err = add_mtd_partitions(mymtd, axis_partitions, pidx);
+		}
+
+		if (err) {
+			panic("axisflashmap could not add MTD partitions!\n");
+		}
+	}
+/* CONFIG_EXTRAXFS_SIM */
+#endif
+
+	if (!romfs_in_flash) {
+		/* Create an RAM device for the root partition (romfs). */
+
+#if !defined(CONFIG_MTD_MTDRAM) || (CONFIG_MTDRAM_TOTAL_SIZE != 0) || (CONFIG_MTDRAM_ABS_POS != 0)
+		/* No use trying to boot this kernel from RAM. Panic! */
+		printk(KERN_EMERG "axisflashmap: Cannot create an MTD RAM "
+		       "device due to kernel (mis)configuration!\n");
+		panic("This kernel cannot boot from RAM!\n");
+#else
+		struct mtd_info *mtd_ram;
+
+		mtd_ram = (struct mtd_info *)kmalloc(sizeof(struct mtd_info),
+						     GFP_KERNEL);
+		if (!mtd_ram) {
+			panic("axisflashmap couldn't allocate memory for "
+			      "mtd_info!\n");
+		}
+
+		printk(KERN_INFO " Adding RAM partition for romfs image:\n");
+		printk(pmsg, pidx, romfs_start, romfs_length);
+
+		err = mtdram_init_device(mtd_ram, (void*)romfs_start,
+		                         romfs_length, "romfs");
+		if (err) {
+			panic("axisflashmap could not initialize MTD RAM "
+			      "device!\n");
+		}
+#endif
+	}
+
+	return err;
+}
+
+/* This adds the above to the kernels init-call chain. */
+module_init(init_axis_flash);
+
+EXPORT_SYMBOL(axisflash_mtd);