[PATCH 22/47] Update and improve axisflashmap for CRISv32.

Jesper Nilsson
2007-12-06T12:48:54Z

- Use default partition table when no partition is found (for initial tests)
- Add config ETRAX_AXISFLASHMAP_MTD0WHOLE to allow whole flash as mtd0.
- Add config for VCS simulator connection.

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
---
arch/cris/arch-v32/drivers/axisflashmap.c | 488 ++++++++++++++++++++---------
1 files changed, 345 insertions(+), 143 deletions(-)

diff --git a/arch/cris/arch-v32/drivers/axisflashmap.c b/arch/cris/arch-v32/drivers/axisflashmap.c
index c5ff95e..51e1e85 100644
--- a/arch/cris/arch-v32/drivers/axisflashmap.c
+++ b/arch/cris/arch-v32/drivers/axisflashmap.c
@@ -1,7 +1,7 @@
/*
* Physical mapping layer for MTD using the Axis partitiontable format
*
- * Copyright (c) 2001, 2002, 2003 Axis Communications AB
+ * Copyright (c) 2001-2007 Axis Communications AB
*
* This file is under the GPL.
*
@@ -10,9 +10,6 @@
* 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>
@@ -27,7 +24,8 @@
#include <linux/mtd/mtdram.h>
#include <linux/mtd/partitions.h>

-#include <asm/arch/hwregs/config_defs.h>
+#include <linux/cramfs_fs.h>
+
#include <asm/axisflashmap.h>
#include <asm/mmu.h>

@@ -37,16 +35,24 @@
#define FLASH_UNCACHED_ADDR KSEG_E
#define FLASH_CACHED_ADDR KSEG_F

+#define PAGESIZE (512)
+
#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
+#define flash_data __u32
#endif

/* From head.S */
-extern unsigned long romfs_start, romfs_length, romfs_in_flash;
+extern unsigned long romfs_in_flash; /* 1 when romfs_start, _length in flash */
+extern unsigned long romfs_start, romfs_length;
+extern unsigned long nand_boot; /* 1 when booted from nand flash */
+
+struct partition_name {
+ char name[6];
+};

/* The master mtd for the entire flash. */
struct mtd_info* axisflash_mtd = NULL;
@@ -112,32 +118,20 @@ static struct map_info map_cse1 = {
.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
+#define MAX_PARTITIONS 7
+#ifdef CONFIG_ETRAX_NANDBOOT
+#define NUM_DEFAULT_PARTITIONS 4
+#define DEFAULT_ROOTFS_PARTITION_NO 2
+#define DEFAULT_MEDIA_SIZE 0x2000000 /* 32 megs */
+#else
+#define NUM_DEFAULT_PARTITIONS 3
+#define DEFAULT_ROOTFS_PARTITION_NO (-1)
+#define DEFAULT_MEDIA_SIZE 0x800000 /* 8 megs */
+#endif

-/*
- * 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)
- }
-};
+#if (MAX_PARTITIONS < NUM_DEFAULT_PARTITIONS)
+#error MAX_PARTITIONS must be >= than NUM_DEFAULT_PARTITIONS
+#endif

/* Initialize the ones normally used. */
static struct mtd_partition axis_partitions[MAX_PARTITIONS] = {
@@ -178,6 +172,56 @@ static struct mtd_partition axis_partitions[MAX_PARTITIONS] = {
},
};

+
+/* If no partition-table was found, we use this default-set.
+ * Default flash size is 8MB (NOR). CONFIG_ETRAX_PTABLE_SECTOR is most
+ * likely the size of one flash block and "filesystem"-partition needs
+ * to be >=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 = 10 * CONFIG_ETRAX_PTABLE_SECTOR,
+ .offset = CONFIG_ETRAX_PTABLE_SECTOR
+ },
+#define FILESYSTEM_SECTOR (11 * CONFIG_ETRAX_PTABLE_SECTOR)
+#ifdef CONFIG_ETRAX_NANDBOOT
+ {
+ .name = "rootfs",
+ .size = 10 * CONFIG_ETRAX_PTABLE_SECTOR,
+ .offset = FILESYSTEM_SECTOR
+ },
+#undef FILESYSTEM_SECTOR
+#define FILESYSTEM_SECTOR (21 * CONFIG_ETRAX_PTABLE_SECTOR)
+#endif
+ {
+ .name = "rwfs",
+ .size = DEFAULT_MEDIA_SIZE - FILESYSTEM_SECTOR,
+ .offset = FILESYSTEM_SECTOR
+ }
+};
+
+#ifdef CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE
+/* Main flash device */
+static struct mtd_partition main_partition = {
+ .name = "main",
+ .size = 0,
+ .offset = 0
+};
+#endif
+
+/* Auxilliary partition if we find another flash */
+static struct mtd_partition aux_partition = {
+ .name = "aux",
+ .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).
@@ -191,7 +235,7 @@ static struct mtd_info *probe_cs(struct map_info *map_cs)
map_cs->name, map_cs->size, map_cs->map_priv_1);

#ifdef CONFIG_MTD_CFI
- mtd_cs = do_map_probe("cfi_probe", map_cs);
+ mtd_cs = do_map_probe("cfi_probe", map_cs);
#endif
#ifdef CONFIG_MTD_JEDECPROBE
if (!mtd_cs)
@@ -204,7 +248,7 @@ static struct mtd_info *probe_cs(struct map_info *map_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 boundaries.
+ * 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
@@ -216,9 +260,8 @@ 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];
+ struct mtd_info *mtds[2];
int count = 0;

if ((mtd_cse0 = probe_cs(&map_cse0)) != NULL)
@@ -226,12 +269,7 @@ static struct mtd_info *flash_probe(void)
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) {
+ if (!mtd_cse0 && !mtd_cse1) {
/* No chip found. */
return NULL;
}
@@ -245,9 +283,7 @@ static struct mtd_info *flash_probe(void)
* So we use the MTD concatenation layer instead of further
* complicating the probing procedure.
*/
- mtd_total = mtd_concat_create(mtds,
- count,
- "cse0+cse1+nand");
+ mtd_total = mtd_concat_create(mtds, count, "cse0+cse1");
#else
printk(KERN_ERR "%s and %s: Cannot concatenate due to kernel "
"(mis)configuration!\n", map_cse0.name, map_cse1.name);
@@ -255,61 +291,162 @@ static struct mtd_info *flash_probe(void)
#endif
if (!mtd_total) {
printk(KERN_ERR "%s and %s: Concatenation failed!\n",
- map_cse0.name, map_cse1.name);
+ map_cse0.name, map_cse1.name);

/* The best we can do now is to only use what we found
- * at cse0.
- */
+ * at cse0. */
mtd_total = mtd_cse0;
map_destroy(mtd_cse1);
}
- } else {
- mtd_total = mtd_cse0? mtd_cse0 : mtd_cse1 ? mtd_cse1 : mtd_nand;
-
- }
+ } else
+ mtd_total = mtd_cse0 ? mtd_cse0 : mtd_cse1;

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;
+ struct mtd_info *main_mtd;
+ struct mtd_info *aux_mtd = NULL;
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];
+ int ptable_ok = 0;
+ static char page[PAGESIZE];
size_t len;
+ int ram_rootfs_partition = -1; /* -1 => no RAM rootfs partition */
+ int part;
+
+ /* We need a root fs. If it resides in RAM, we need to use an
+ * MTDRAM device, so it must be enabled in the kernel config,
+ * but its size must be configured as 0 so as not to conflict
+ * with our usage.
+ */
+#if !defined(CONFIG_MTD_MTDRAM) || (CONFIG_MTDRAM_TOTAL_SIZE != 0) || (CONFIG_MTDRAM_ABS_POS != 0)
+ if (!romfs_in_flash && !nand_boot) {
+ printk(KERN_EMERG "axisflashmap: Cannot create an MTD RAM "
+ "device; configure CONFIG_MTD_MTDRAM with size = 0!\n");
+ panic("This kernel cannot boot from RAM!\n");
+ }
+#endif
+
+#ifndef CONFIG_ETRAX_VCS_SIM
+ main_mtd = flash_probe();
+ if (main_mtd)
+ printk(KERN_INFO "%s: 0x%08x bytes of NOR flash memory.\n",
+ main_mtd->name, main_mtd->size);
+
+#ifdef CONFIG_ETRAX_NANDFLASH
+ aux_mtd = crisv32_nand_flash_probe();
+ if (aux_mtd)
+ printk(KERN_INFO "%s: 0x%08x bytes of NAND flash memory.\n",
+ aux_mtd->name, aux_mtd->size);
+
+#ifdef CONFIG_ETRAX_NANDBOOT
+ {
+ struct mtd_info *tmp_mtd;

-#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);
+ printk(KERN_INFO "axisflashmap: Set to boot from NAND flash, "
+ "making NAND flash primary device.\n");
+ tmp_mtd = main_mtd;
+ main_mtd = aux_mtd;
+ aux_mtd = tmp_mtd;
+ }
+#endif /* CONFIG_ETRAX_NANDBOOT */
+#endif /* CONFIG_ETRAX_NANDFLASH */

- if (!mymtd) {
+ if (!main_mtd && !aux_mtd) {
/* 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;
+#if 0 /* Dump flash memory so we can see what is going on */
+ if (main_mtd) {
+ int sectoraddr, i;
+ for (sectoraddr = 0; sectoraddr < 2*65536+4096;
+ sectoraddr += PAGESIZE) {
+ main_mtd->read(main_mtd, sectoraddr, PAGESIZE, &len,
+ page);
+ printk(KERN_INFO
+ "Sector at %d (length %d):\n",
+ sectoraddr, len);
+ for (i = 0; i < PAGESIZE; i += 16) {
+ printk(KERN_INFO
+ "%02x %02x %02x %02x "
+ "%02x %02x %02x %02x "
+ "%02x %02x %02x %02x "
+ "%02x %02x %02x %02x\n",
+ page[i] & 255, page[i+1] & 255,
+ page[i+2] & 255, page[i+3] & 255,
+ page[i+4] & 255, page[i+5] & 255,
+ page[i+6] & 255, page[i+7] & 255,
+ page[i+8] & 255, page[i+9] & 255,
+ page[i+10] & 255, page[i+11] & 255,
+ page[i+12] & 255, page[i+13] & 255,
+ page[i+14] & 255, page[i+15] & 255);
+ }
+ }
+ }
+#endif
+
+ if (main_mtd) {
+ main_mtd->owner = THIS_MODULE;
+ axisflash_mtd = main_mtd;
+
+ loff_t ptable_sector = CONFIG_ETRAX_PTABLE_SECTOR;
+
+ /* First partition (rescue) is always set to the default. */
+ pidx++;
+#ifdef CONFIG_ETRAX_NANDBOOT
+ /* We know where the partition table should be located,
+ * it will be in first good block after that.
+ */
+ int blockstat;
+ do {
+ blockstat = main_mtd->block_isbad(main_mtd,
+ ptable_sector);
+ if (blockstat < 0)
+ ptable_sector = 0; /* read error */
+ else if (blockstat)
+ ptable_sector += main_mtd->erasesize;
+ } while (blockstat && ptable_sector);
+#endif
+ if (ptable_sector) {
+ main_mtd->read(main_mtd, ptable_sector, PAGESIZE,
+ &len, page);
+ ptable_head = &((struct partitiontable *) page)->head;
+ }
+
+#if 0 /* Dump partition table so we can see what is going on */
+ printk(KERN_INFO
+ "axisflashmap: flash read %d bytes at 0x%08x, data: "
+ "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+ len, CONFIG_ETRAX_PTABLE_SECTOR,
+ page[0] & 255, page[1] & 255,
+ page[2] & 255, page[3] & 255,
+ page[4] & 255, page[5] & 255,
+ page[6] & 255, page[7] & 255);
+ printk(KERN_INFO
+ "axisflashmap: partition table offset %d, data: "
+ "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+ PARTITION_TABLE_OFFSET,
+ page[PARTITION_TABLE_OFFSET+0] & 255,
+ page[PARTITION_TABLE_OFFSET+1] & 255,
+ page[PARTITION_TABLE_OFFSET+2] & 255,
+ page[PARTITION_TABLE_OFFSET+3] & 255,
+ page[PARTITION_TABLE_OFFSET+4] & 255,
+ page[PARTITION_TABLE_OFFSET+5] & 255,
+ page[PARTITION_TABLE_OFFSET+6] & 255,
+ page[PARTITION_TABLE_OFFSET+7] & 255);
+#endif
}
- pidx++; /* First partition is always set to the default. */

if (ptable_head && (ptable_head->magic == PARTITION_TABLE_MAGIC)
&& (ptable_head->size <
@@ -322,7 +459,6 @@ static int __init init_axis_flash(void)
/* 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) +
@@ -346,104 +482,170 @@ static int __init init_axis_flash(void)
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",
+ printk(KERN_INFO "axisflashmap: "
+ "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.
+ * partition table. Scan the table. It ends with 0xffffffff.
*/
while (ptable_ok
- && ptable->offset != 0xffffffff
+ && ptable->offset != PARTITIONTABLE_END_MARKER
&& ptable < max_addr
- && pidx < MAX_PARTITIONS) {
+ && pidx < MAX_PARTITIONS - 1) {

- 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);
+ axis_partitions[pidx].offset = offset + ptable->offset;
+#ifdef CONFIG_ETRAX_NANDFLASH
+ if (main_mtd->type == MTD_NANDFLASH) {
+ axis_partitions[pidx].size =
+ (((ptable+1)->offset ==
+ PARTITIONTABLE_END_MARKER) ?
+ main_mtd->size :
+ ((ptable+1)->offset + offset)) -
+ (ptable->offset + offset);
+
+ } else
+#endif /* CONFIG_ETRAX_NANDFLASH */
+ axis_partitions[pidx].size = ptable->size;
+#ifdef CONFIG_ETRAX_NANDBOOT
+ /* Save partition number of jffs2 ro partition.
+ * Needed if RAM booting or root file system in RAM.
+ */
+ if (!nand_boot &&
+ ram_rootfs_partition < 0 && /* not already set */
+ ptable->type == PARTITION_TYPE_JFFS2 &&
+ (ptable->flags & PARTITION_FLAGS_READONLY_MASK) ==
+ PARTITION_FLAGS_READONLY)
+ ram_rootfs_partition = pidx;
+#endif /* CONFIG_ETRAX_NANDBOOT */
pidx++;
ptable++;
}
- use_default_ptable = !ptable_ok;
}

- if (romfs_in_flash) {
- /* Add an overlapping device for the root partition (romfs). */
+ /* Decide whether to use default partition table. */
+ /* Only use default table if we actually have a device (main_mtd) */

- 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;
- }
+ struct mtd_partition *partition = &axis_partitions[0];
+ if (main_mtd && !ptable_ok) {
+ memcpy(axis_partitions, axis_default_partitions,
+ sizeof(axis_default_partitions));
+ pidx = NUM_DEFAULT_PARTITIONS;
+ ram_rootfs_partition = DEFAULT_ROOTFS_PARTITION_NO;
+ }

+ /* Add artificial partitions for rootfs if necessary */
+ if (romfs_in_flash) {
+ /* rootfs is in directly accessible flash memory = NOR flash.
+ Add an overlapping device for the rootfs partition. */
+ printk(KERN_INFO "axisflashmap: Adding partition for "
+ "overlapping root file system image\n");
+ axis_partitions[pidx].size = romfs_length;
+ axis_partitions[pidx].offset = romfs_start - FLASH_CACHED_ADDR;
+ axis_partitions[pidx].name = "romfs";
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);
+ ram_rootfs_partition = -1;
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);
+ } else if (romfs_length && !nand_boot) {
+ /* romfs exists in memory, but not in flash, so must be in RAM.
+ * Configure an MTDRAM partition. */
+ if (ram_rootfs_partition < 0) {
+ /* None set yet, put it at the end */
+ ram_rootfs_partition = pidx;
+ pidx++;
}
+ printk(KERN_INFO "axisflashmap: Adding partition for "
+ "root file system image in RAM\n");
+ axis_partitions[ram_rootfs_partition].size = romfs_length;
+ axis_partitions[ram_rootfs_partition].offset = romfs_start;
+ axis_partitions[ram_rootfs_partition].name = "romfs";
+ axis_partitions[ram_rootfs_partition].mask_flags |=
+ MTD_WRITEABLE;
+ }

- if (err) {
- panic("axisflashmap could not add MTD partitions!\n");
- }
+#ifdef CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE
+ if (main_mtd) {
+ main_partition.size = main_mtd->size;
+ err = add_mtd_partitions(main_mtd, &main_partition, 1);
+ if (err)
+ panic("axisflashmap: Could not initialize "
+ "partition for whole main mtd device!\n");
}
-/* CONFIG_EXTRAXFS_SIM */
#endif

- if (!romfs_in_flash) {
- /* Create an RAM device for the root partition (romfs). */
+ /* Now, register all partitions with mtd.
+ * We do this one at a time so we can slip in an MTDRAM device
+ * in the proper place if required. */
+
+ for (part = 0; part < pidx; part++) {
+ if (part == ram_rootfs_partition) {
+ /* add MTDRAM partition here */
+ struct mtd_info *mtd_ram;
+
+ mtd_ram = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
+ if (!mtd_ram)
+ panic("axisflashmap: Couldn't allocate memory "
+ "for mtd_info!\n");
+ printk(KERN_INFO "axisflashmap: Adding RAM partition "
+ "for rootfs image.\n");
+ err = mtdram_init_device(mtd_ram,
+ (void *)partition[part].offset,
+ partition[part].size,
+ partition[part].name);
+ if (err)
+ panic("axisflashmap: Could not initialize "
+ "MTD RAM device!\n");
+ /* JFFS2 likes to have an erasesize. Keep potential
+ * JFFS2 rootfs happy by providing one. Since image
+ * was most likely created for main mtd, use that
+ * erasesize, if available. Otherwise, make a guess. */
+ mtd_ram->erasesize = (main_mtd ? main_mtd->erasesize :
+ CONFIG_ETRAX_PTABLE_SECTOR);
+ } else {
+ err = add_mtd_partitions(main_mtd, &partition[part], 1);
+ if (err)
+ panic("axisflashmap: Could not add mtd "
+ "partition %d\n", part);
+ }
+ }
+#endif /* CONFIG_EXTRAX_VCS_SIM */
+
+#ifdef CONFIG_ETRAX_VCS_SIM
+ /* For simulator, always use a RAM partition.
+ * The rootfs will be found after the kernel in RAM,
+ * with romfs_start and romfs_end indicating location and size.
+ */
+ struct mtd_info *mtd_ram;
+
+ mtd_ram = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
+ if (!mtd_ram) {
+ panic("axisflashmap: Couldn't allocate memory for "
+ "mtd_info!\n");
+ }

-#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;
+ printk(KERN_INFO "axisflashmap: Adding RAM partition for romfs, "
+ "at %u, size %u\n",
+ (unsigned) romfs_start, (unsigned) romfs_length);

- mtd_ram = kmalloc(sizeof(struct mtd_info),
- GFP_KERNEL);
- if (!mtd_ram) {
- panic("axisflashmap couldn't allocate memory for "
- "mtd_info!\n");
- }
+ err = mtdram_init_device(mtd_ram, (void *)romfs_start,
+ romfs_length, "romfs");
+ if (err) {
+ panic("axisflashmap: Could not initialize MTD RAM "
+ "device!\n");
+ }
+#endif /* CONFIG_EXTRAX_VCS_SIM */

- printk(KERN_INFO " Adding RAM partition for romfs image:\n");
- printk(pmsg, pidx, romfs_start, romfs_length);
+#ifndef CONFIG_ETRAX_VCS_SIM
+ if (aux_mtd) {
+ aux_partition.size = aux_mtd->size;
+ err = add_mtd_partitions(aux_mtd, &aux_partition, 1);
+ if (err)
+ panic("axisflashmap: Could not initialize "
+ "aux mtd device!\n");

- err = mtdram_init_device(mtd_ram, (void*)romfs_start,
- romfs_length, "romfs");
- if (err) {
- panic("axisflashmap could not initialize MTD RAM "
- "device!\n");
- }
-#endif
}
+#endif /* CONFIG_EXTRAX_VCS_SIM */

return err;
}
--
1.5.3.6.970.gd25430