implement openwrt compliant flashmap

SVN-Revision: 11035

1 files changed, 92 insertions, 0 deletions

diff --git a/target/linux/etrax/patches/201-flashsize.patch b/target/linux/etrax/patches/201-flashsize.patch
new file mode 100644
index 0000000..4982963
--- /dev/null
+++ b/target/linux/etrax/patches/201-flashsize.patch
@@ -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;