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implement openwrt compliant flashmap

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SVN-Revision: 11035
This commit is contained in:
John Crispin 2008-05-03 19:40:15 +00:00
parent cc3c8739f2
commit 37f2ef0e72
1 changed files with 92 additions and 0 deletions
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92
target/linux/etrax/patches/201-flashsize.patch Normal file
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@ -0,0 +1,92 @@
Index: linux-2.6.25.1/arch/cris/arch-v10/lib/hw_settings.S
===================================================================
--- linux-2.6.25.1.orig/arch/cris/arch-v10/lib/hw_settings.S 2008-05-03 20:25:16.000000000 +0100
+++ linux-2.6.25.1/arch/cris/arch-v10/lib/hw_settings.S 2008-05-03 20:25:35.000000000 +0100
@@ -60,3 +60,5 @@
.dword R_PORT_PB_SET
.dword PB_SET_VALUE
.dword 0 ; No more register values
+ .ascii "ACME_PART_MAGIC"
+ .dword 0xdeadc0de
Index: linux-2.6.25.1/arch/cris/arch-v10/drivers/axisflashmap.c
===================================================================
--- linux-2.6.25.1.orig/arch/cris/arch-v10/drivers/axisflashmap.c 2008-05-03 20:27:28.000000000 +0100
+++ linux-2.6.25.1/arch/cris/arch-v10/drivers/axisflashmap.c 2008-05-03 20:34:54.000000000 +0100
@@ -113,7 +113,7 @@
/* If no partition-table was found, we use this default-set. */
#define MAX_PARTITIONS 7
-#define NUM_DEFAULT_PARTITIONS 3
+#define NUM_DEFAULT_PARTITIONS 2
/*
* Default flash size is 2MB. CONFIG_ETRAX_PTABLE_SECTOR is most likely the
@@ -122,19 +122,14 @@
*/
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
+ .size = 0x00,
+ .offset = 0
},
{
- .name = "filesystem",
- .size = 5 * CONFIG_ETRAX_PTABLE_SECTOR,
- .offset = 0x200000 - (5 * CONFIG_ETRAX_PTABLE_SECTOR)
+ .name = "rootfs",
+ .size = 0x200000 ,
+ .offset = 0x200000
}
};
@@ -281,6 +276,11 @@
struct partitiontable_entry *ptable;
int use_default_ptable = 1; /* Until proven otherwise. */
const char pmsg[] = " /dev/flash%d at 0x%08x, size 0x%08x\n";
+ unsigned int kernel_part_size = 0;
+ unsigned char *flash_mem = (unsigned char*)(FLASH_CACHED_ADDR);
+ unsigned int flash_scan_count = 0;
+ const char *part_magic = "ACME_PART_MAGIC";
+ unsigned int magic_len = strlen(part_magic);
if (!(mymtd = flash_probe())) {
/* There's no reason to use this module if no flash chip can
@@ -292,6 +292,31 @@
mymtd->name, mymtd->size);
axisflash_mtd = mymtd;
}
+ /* scan flash to findout where out partition starts */
+
+ printk(KERN_INFO "Scanning flash for end of kernel magic\n");
+ for(flash_scan_count = 0; flash_scan_count < 100000; flash_scan_count++){
+ if(strncmp(&flash_mem[flash_scan_count], part_magic, magic_len - 1) == 0)
+ {
+ kernel_part_size = flash_mem[flash_scan_count + magic_len ];
+ kernel_part_size <<= 8;
+ kernel_part_size += flash_mem[flash_scan_count + magic_len + 2];
+ kernel_part_size <<= 8;
+ kernel_part_size += flash_mem[flash_scan_count + magic_len + 1];
+ kernel_part_size <<= 8;
+ kernel_part_size += flash_mem[flash_scan_count + magic_len + 3];
+ printk(KERN_INFO "Kernel ends at 0x%.08X\n", kernel_part_size);
+ flash_scan_count = 1100000;
+ }
+ }
+
+
+ if(kernel_part_size){
+ kernel_part_size = (kernel_part_size & 0xffff0000);
+ axis_default_partitions[0].size = kernel_part_size;
+ axis_default_partitions[1].size = mymtd->size - axis_default_partitions[0].size;
+ axis_default_partitions[1].offset = axis_default_partitions[0].size;
+ }
if (mymtd) {
mymtd->owner = THIS_MODULE;