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CRIS v32: Update and improve axisflashmap
- 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.
This commit is contained in:
Jesper Nilsson
parent
201ca54aa0
commit
5fc1f3122f
@ -1,7 +1,7 @@
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/*
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* Physical mapping layer for MTD using the Axis partitiontable format
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*
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* Copyright (c) 2001, 2002, 2003 Axis Communications AB
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* Copyright (c) 2001-2007 Axis Communications AB
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*
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* This file is under the GPL.
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*
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@ -10,9 +10,6 @@
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* tells us what other partitions to define. If there isn't, we use a default
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* partition split defined below.
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*
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* Copy of os/lx25/arch/cris/arch-v10/drivers/axisflashmap.c 1.5
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* with minor changes.
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*
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*/
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#include <linux/module.h>
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@ -27,7 +24,8 @@
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#include <linux/mtd/mtdram.h>
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#include <linux/mtd/partitions.h>
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#include <asm/arch/hwregs/config_defs.h>
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#include <linux/cramfs_fs.h>
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#include <asm/axisflashmap.h>
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#include <asm/mmu.h>
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@ -37,16 +35,24 @@
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#define FLASH_UNCACHED_ADDR KSEG_E
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#define FLASH_CACHED_ADDR KSEG_F
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#define PAGESIZE (512)
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#if CONFIG_ETRAX_FLASH_BUSWIDTH==1
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#define flash_data __u8
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#elif CONFIG_ETRAX_FLASH_BUSWIDTH==2
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#define flash_data __u16
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#elif CONFIG_ETRAX_FLASH_BUSWIDTH==4
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#define flash_data __u16
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#define flash_data __u32
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#endif
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/* From head.S */
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extern unsigned long romfs_start, romfs_length, romfs_in_flash;
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extern unsigned long romfs_in_flash; /* 1 when romfs_start, _length in flash */
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extern unsigned long romfs_start, romfs_length;
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extern unsigned long nand_boot; /* 1 when booted from nand flash */
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struct partition_name {
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char name[6];
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};
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/* The master mtd for the entire flash. */
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struct mtd_info* axisflash_mtd = NULL;
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@ -112,32 +118,20 @@ static struct map_info map_cse1 = {
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.map_priv_1 = FLASH_UNCACHED_ADDR + MEM_CSE0_SIZE
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};
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/* If no partition-table was found, we use this default-set. */
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#define MAX_PARTITIONS 7
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#define NUM_DEFAULT_PARTITIONS 3
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#define MAX_PARTITIONS 7
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#ifdef CONFIG_ETRAX_NANDBOOT
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#define NUM_DEFAULT_PARTITIONS 4
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#define DEFAULT_ROOTFS_PARTITION_NO 2
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#define DEFAULT_MEDIA_SIZE 0x2000000 /* 32 megs */
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#else
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#define NUM_DEFAULT_PARTITIONS 3
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#define DEFAULT_ROOTFS_PARTITION_NO (-1)
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#define DEFAULT_MEDIA_SIZE 0x800000 /* 8 megs */
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#endif
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/*
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* Default flash size is 2MB. CONFIG_ETRAX_PTABLE_SECTOR is most likely the
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* size of one flash block and "filesystem"-partition needs 5 blocks to be able
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* to use JFFS.
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*/
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static struct mtd_partition axis_default_partitions[NUM_DEFAULT_PARTITIONS] = {
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{
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.name = "boot firmware",
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.size = CONFIG_ETRAX_PTABLE_SECTOR,
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.offset = 0
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},
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{
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.name = "kernel",
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.size = 0x200000 - (6 * CONFIG_ETRAX_PTABLE_SECTOR),
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.offset = CONFIG_ETRAX_PTABLE_SECTOR
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},
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{
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.name = "filesystem",
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.size = 5 * CONFIG_ETRAX_PTABLE_SECTOR,
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.offset = 0x200000 - (5 * CONFIG_ETRAX_PTABLE_SECTOR)
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}
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};
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#if (MAX_PARTITIONS < NUM_DEFAULT_PARTITIONS)
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#error MAX_PARTITIONS must be >= than NUM_DEFAULT_PARTITIONS
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#endif
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/* Initialize the ones normally used. */
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static struct mtd_partition axis_partitions[MAX_PARTITIONS] = {
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@ -178,6 +172,56 @@ static struct mtd_partition axis_partitions[MAX_PARTITIONS] = {
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},
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};
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/* If no partition-table was found, we use this default-set.
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* Default flash size is 8MB (NOR). CONFIG_ETRAX_PTABLE_SECTOR is most
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* likely the size of one flash block and "filesystem"-partition needs
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* to be >=5 blocks to be able to use JFFS.
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*/
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static struct mtd_partition axis_default_partitions[NUM_DEFAULT_PARTITIONS] = {
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{
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.name = "boot firmware",
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.size = CONFIG_ETRAX_PTABLE_SECTOR,
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.offset = 0
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},
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{
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.name = "kernel",
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.size = 10 * CONFIG_ETRAX_PTABLE_SECTOR,
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.offset = CONFIG_ETRAX_PTABLE_SECTOR
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},
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#define FILESYSTEM_SECTOR (11 * CONFIG_ETRAX_PTABLE_SECTOR)
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#ifdef CONFIG_ETRAX_NANDBOOT
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{
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.name = "rootfs",
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.size = 10 * CONFIG_ETRAX_PTABLE_SECTOR,
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.offset = FILESYSTEM_SECTOR
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},
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#undef FILESYSTEM_SECTOR
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#define FILESYSTEM_SECTOR (21 * CONFIG_ETRAX_PTABLE_SECTOR)
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#endif
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{
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.name = "rwfs",
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.size = DEFAULT_MEDIA_SIZE - FILESYSTEM_SECTOR,
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.offset = FILESYSTEM_SECTOR
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}
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};
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#ifdef CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE
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/* Main flash device */
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static struct mtd_partition main_partition = {
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.name = "main",
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.size = 0,
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.offset = 0
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};
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#endif
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/* Auxilliary partition if we find another flash */
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static struct mtd_partition aux_partition = {
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.name = "aux",
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.size = 0,
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.offset = 0
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};
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/*
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* Probe a chip select for AMD-compatible (JEDEC) or CFI-compatible flash
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* chips in that order (because the amd_flash-driver is faster).
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@ -191,7 +235,7 @@ static struct mtd_info *probe_cs(struct map_info *map_cs)
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map_cs->name, map_cs->size, map_cs->map_priv_1);
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#ifdef CONFIG_MTD_CFI
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mtd_cs = do_map_probe("cfi_probe", map_cs);
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mtd_cs = do_map_probe("cfi_probe", map_cs);
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#endif
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#ifdef CONFIG_MTD_JEDECPROBE
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if (!mtd_cs)
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@ -204,7 +248,7 @@ static struct mtd_info *probe_cs(struct map_info *map_cs)
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/*
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* Probe each chip select individually for flash chips. If there are chips on
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* both cse0 and cse1, the mtd_info structs will be concatenated to one struct
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* so that MTD partitions can cross chip boundaries.
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* so that MTD partitions can cross chip boundries.
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*
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* The only known restriction to how you can mount your chips is that each
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* chip select must hold similar flash chips. But you need external hardware
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@ -216,9 +260,8 @@ static struct mtd_info *flash_probe(void)
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{
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struct mtd_info *mtd_cse0;
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struct mtd_info *mtd_cse1;
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struct mtd_info *mtd_nand = NULL;
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struct mtd_info *mtd_total;
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struct mtd_info *mtds[3];
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struct mtd_info *mtds[2];
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int count = 0;
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if ((mtd_cse0 = probe_cs(&map_cse0)) != NULL)
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@ -226,12 +269,7 @@ static struct mtd_info *flash_probe(void)
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if ((mtd_cse1 = probe_cs(&map_cse1)) != NULL)
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mtds[count++] = mtd_cse1;
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#ifdef CONFIG_ETRAX_NANDFLASH
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if ((mtd_nand = crisv32_nand_flash_probe()) != NULL)
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mtds[count++] = mtd_nand;
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#endif
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if (!mtd_cse0 && !mtd_cse1 && !mtd_nand) {
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if (!mtd_cse0 && !mtd_cse1) {
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/* No chip found. */
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return NULL;
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}
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@ -245,9 +283,7 @@ static struct mtd_info *flash_probe(void)
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* So we use the MTD concatenation layer instead of further
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* complicating the probing procedure.
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*/
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mtd_total = mtd_concat_create(mtds,
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count,
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"cse0+cse1+nand");
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mtd_total = mtd_concat_create(mtds, count, "cse0+cse1");
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#else
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printk(KERN_ERR "%s and %s: Cannot concatenate due to kernel "
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"(mis)configuration!\n", map_cse0.name, map_cse1.name);
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@ -255,61 +291,162 @@ static struct mtd_info *flash_probe(void)
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#endif
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if (!mtd_total) {
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printk(KERN_ERR "%s and %s: Concatenation failed!\n",
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map_cse0.name, map_cse1.name);
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map_cse0.name, map_cse1.name);
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/* The best we can do now is to only use what we found
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* at cse0.
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*/
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* at cse0. */
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mtd_total = mtd_cse0;
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map_destroy(mtd_cse1);
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}
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} else {
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mtd_total = mtd_cse0? mtd_cse0 : mtd_cse1 ? mtd_cse1 : mtd_nand;
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}
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} else
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mtd_total = mtd_cse0 ? mtd_cse0 : mtd_cse1;
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return mtd_total;
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}
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extern unsigned long crisv32_nand_boot;
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extern unsigned long crisv32_nand_cramfs_offset;
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/*
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* Probe the flash chip(s) and, if it succeeds, read the partition-table
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* and register the partitions with MTD.
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*/
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static int __init init_axis_flash(void)
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{
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struct mtd_info *mymtd;
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struct mtd_info *main_mtd;
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struct mtd_info *aux_mtd = NULL;
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int err = 0;
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int pidx = 0;
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struct partitiontable_head *ptable_head = NULL;
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struct partitiontable_entry *ptable;
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int use_default_ptable = 1; /* Until proven otherwise. */
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const char *pmsg = KERN_INFO " /dev/flash%d at 0x%08x, size 0x%08x\n";
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static char page[512];
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int ptable_ok = 0;
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static char page[PAGESIZE];
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size_t len;
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int ram_rootfs_partition = -1; /* -1 => no RAM rootfs partition */
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int part;
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#ifndef CONFIG_ETRAXFS_SIM
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mymtd = flash_probe();
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mymtd->read(mymtd, CONFIG_ETRAX_PTABLE_SECTOR, 512, &len, page);
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ptable_head = (struct partitiontable_head *)(page + PARTITION_TABLE_OFFSET);
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/* We need a root fs. If it resides in RAM, we need to use an
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* MTDRAM device, so it must be enabled in the kernel config,
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* but its size must be configured as 0 so as not to conflict
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* with our usage.
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*/
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#if !defined(CONFIG_MTD_MTDRAM) || (CONFIG_MTDRAM_TOTAL_SIZE != 0) || (CONFIG_MTDRAM_ABS_POS != 0)
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if (!romfs_in_flash && !nand_boot) {
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printk(KERN_EMERG "axisflashmap: Cannot create an MTD RAM "
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"device; configure CONFIG_MTD_MTDRAM with size = 0!\n");
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panic("This kernel cannot boot from RAM!\n");
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}
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#endif
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if (!mymtd) {
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#ifndef CONFIG_ETRAX_VCS_SIM
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main_mtd = flash_probe();
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if (main_mtd)
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printk(KERN_INFO "%s: 0x%08x bytes of NOR flash memory.\n",
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main_mtd->name, main_mtd->size);
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#ifdef CONFIG_ETRAX_NANDFLASH
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aux_mtd = crisv32_nand_flash_probe();
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if (aux_mtd)
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printk(KERN_INFO "%s: 0x%08x bytes of NAND flash memory.\n",
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aux_mtd->name, aux_mtd->size);
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#ifdef CONFIG_ETRAX_NANDBOOT
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{
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struct mtd_info *tmp_mtd;
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printk(KERN_INFO "axisflashmap: Set to boot from NAND flash, "
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"making NAND flash primary device.\n");
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tmp_mtd = main_mtd;
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main_mtd = aux_mtd;
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aux_mtd = tmp_mtd;
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}
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#endif /* CONFIG_ETRAX_NANDBOOT */
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#endif /* CONFIG_ETRAX_NANDFLASH */
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if (!main_mtd && !aux_mtd) {
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/* There's no reason to use this module if no flash chip can
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* be identified. Make sure that's understood.
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*/
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printk(KERN_INFO "axisflashmap: Found no flash chip.\n");
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} else {
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printk(KERN_INFO "%s: 0x%08x bytes of flash memory.\n",
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mymtd->name, mymtd->size);
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axisflash_mtd = mymtd;
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}
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if (mymtd) {
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mymtd->owner = THIS_MODULE;
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#if 0 /* Dump flash memory so we can see what is going on */
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if (main_mtd) {
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int sectoraddr, i;
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for (sectoraddr = 0; sectoraddr < 2*65536+4096;
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sectoraddr += PAGESIZE) {
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main_mtd->read(main_mtd, sectoraddr, PAGESIZE, &len,
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page);
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printk(KERN_INFO
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"Sector at %d (length %d):\n",
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sectoraddr, len);
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for (i = 0; i < PAGESIZE; i += 16) {
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printk(KERN_INFO
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"%02x %02x %02x %02x "
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"%02x %02x %02x %02x "
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"%02x %02x %02x %02x "
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"%02x %02x %02x %02x\n",
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page[i] & 255, page[i+1] & 255,
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page[i+2] & 255, page[i+3] & 255,
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page[i+4] & 255, page[i+5] & 255,
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page[i+6] & 255, page[i+7] & 255,
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page[i+8] & 255, page[i+9] & 255,
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page[i+10] & 255, page[i+11] & 255,
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page[i+12] & 255, page[i+13] & 255,
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page[i+14] & 255, page[i+15] & 255);
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}
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}
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}
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#endif
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if (main_mtd) {
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main_mtd->owner = THIS_MODULE;
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axisflash_mtd = main_mtd;
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loff_t ptable_sector = CONFIG_ETRAX_PTABLE_SECTOR;
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/* First partition (rescue) is always set to the default. */
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pidx++;
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#ifdef CONFIG_ETRAX_NANDBOOT
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/* We know where the partition table should be located,
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* it will be in first good block after that.
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*/
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int blockstat;
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do {
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blockstat = main_mtd->block_isbad(main_mtd,
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ptable_sector);
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if (blockstat < 0)
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ptable_sector = 0; /* read error */
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else if (blockstat)
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ptable_sector += main_mtd->erasesize;
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} while (blockstat && ptable_sector);
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#endif
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if (ptable_sector) {
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main_mtd->read(main_mtd, ptable_sector, PAGESIZE,
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&len, page);
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ptable_head = &((struct partitiontable *) page)->head;
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}
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#if 0 /* Dump partition table so we can see what is going on */
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printk(KERN_INFO
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"axisflashmap: flash read %d bytes at 0x%08x, data: "
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"%02x %02x %02x %02x %02x %02x %02x %02x\n",
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len, CONFIG_ETRAX_PTABLE_SECTOR,
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page[0] & 255, page[1] & 255,
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page[2] & 255, page[3] & 255,
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page[4] & 255, page[5] & 255,
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page[6] & 255, page[7] & 255);
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printk(KERN_INFO
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"axisflashmap: partition table offset %d, data: "
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"%02x %02x %02x %02x %02x %02x %02x %02x\n",
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PARTITION_TABLE_OFFSET,
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page[PARTITION_TABLE_OFFSET+0] & 255,
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page[PARTITION_TABLE_OFFSET+1] & 255,
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page[PARTITION_TABLE_OFFSET+2] & 255,
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page[PARTITION_TABLE_OFFSET+3] & 255,
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page[PARTITION_TABLE_OFFSET+4] & 255,
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page[PARTITION_TABLE_OFFSET+5] & 255,
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page[PARTITION_TABLE_OFFSET+6] & 255,
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page[PARTITION_TABLE_OFFSET+7] & 255);
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#endif
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}
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pidx++; /* First partition is always set to the default. */
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if (ptable_head && (ptable_head->magic == PARTITION_TABLE_MAGIC)
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&& (ptable_head->size <
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@ -322,7 +459,6 @@ static int __init init_axis_flash(void)
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/* Looks like a start, sane length and end of a
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* partition table, lets check csum etc.
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*/
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int ptable_ok = 0;
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struct partitiontable_entry *max_addr =
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(struct partitiontable_entry *)
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((unsigned long)ptable_head + sizeof(*ptable_head) +
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@ -346,105 +482,171 @@ static int __init init_axis_flash(void)
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ptable_ok = (csum == ptable_head->checksum);
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/* Read the entries and use/show the info. */
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printk(KERN_INFO " Found a%s partition table at 0x%p-0x%p.\n",
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printk(KERN_INFO "axisflashmap: "
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"Found a%s partition table at 0x%p-0x%p.\n",
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(ptable_ok ? " valid" : "n invalid"), ptable_head,
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max_addr);
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/* We have found a working bootblock. Now read the
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* partition table. Scan the table. It ends when
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* there is 0xffffffff, that is, empty flash.
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* 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;
|
||||
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);
|
||||
|
||||
printk(pmsg, pidx, axis_partitions[pidx].offset,
|
||||
axis_partitions[pidx].size);
|
||||
} 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;
|
||||
}
|
||||
|
||||
/* Decide whether to use default partition table. */
|
||||
/* Only use default table if we actually have a device (main_mtd) */
|
||||
|
||||
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) {
|
||||
/* Add an overlapping device for the root partition (romfs). */
|
||||
|
||||
/* 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";
|
||||
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);
|
||||
ram_rootfs_partition = -1;
|
||||
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 (mymtd) {
|
||||
if (use_default_ptable) {
|
||||
printk(KERN_INFO " Using default partition table.\n");
|
||||
err = add_mtd_partitions(mymtd, axis_default_partitions,
|
||||
NUM_DEFAULT_PARTITIONS);
|
||||
#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");
|
||||
}
|
||||
#endif
|
||||
|
||||
/* 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(mymtd, axis_partitions, pidx);
|
||||
}
|
||||
|
||||
if (err) {
|
||||
panic("axisflashmap could not add MTD partitions!\n");
|
||||
err = add_mtd_partitions(main_mtd, &partition[part], 1);
|
||||
if (err)
|
||||
panic("axisflashmap: Could not add mtd "
|
||||
"partition %d\n", part);
|
||||
}
|
||||
}
|
||||
/* CONFIG_EXTRAXFS_SIM */
|
||||
#endif
|
||||
#endif /* CONFIG_EXTRAX_VCS_SIM */
|
||||
|
||||
if (!romfs_in_flash) {
|
||||
/* Create an RAM device for the root partition (romfs). */
|
||||
#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;
|
||||
|
||||
#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 = 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
|
||||
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 romfs, "
|
||||
"at %u, size %u\n",
|
||||
(unsigned) romfs_start, (unsigned) 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 /* CONFIG_EXTRAX_VCS_SIM */
|
||||
|
||||
#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");
|
||||
|
||||
}
|
||||
#endif /* CONFIG_EXTRAX_VCS_SIM */
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user