Initial OLPC target

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9457 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 234 insertions, 0 deletions

diff --git a/target/linux/olpc/patches/300-block2mtd_init.patch b/target/linux/olpc/patches/300-block2mtd_init.patch
new file mode 100644
index 0000000000..5d81f2fcfc
--- /dev/null
+++ b/target/linux/olpc/patches/300-block2mtd_init.patch
@@ -0,0 +1,234 @@
+Index: linux-2.6.23/drivers/mtd/devices/block2mtd.c
+===================================================================
+--- linux-2.6.23.orig/drivers/mtd/devices/block2mtd.c	2007-10-25 21:43:40.854599193 +0200
++++ linux-2.6.23/drivers/mtd/devices/block2mtd.c	2007-10-25 22:23:19.066125745 +0200
+@@ -20,6 +20,7 @@
+ #include <linux/buffer_head.h>
+ #include <linux/mutex.h>
+ #include <linux/mount.h>
++#include <linux/list.h>
+ 
+ #define VERSION "$Revision: 1.30 $"
+ 
+@@ -27,6 +28,12 @@
+ #define ERROR(fmt, args...) printk(KERN_ERR "block2mtd: " fmt "\n" , ## args)
+ #define INFO(fmt, args...) printk(KERN_INFO "block2mtd: " fmt "\n" , ## args)
+ 
++struct retry {
++	struct list_head list;
++	const char *val;
++};
++
++static LIST_HEAD(retry_list);
+ 
+ /* Info for the block device */
+ struct block2mtd_dev {
+@@ -38,10 +45,36 @@
+ 	char devname[0];
+ };
+ 
++static int block2mtd_setup2(const char *val);
+ 
+ /* Static info about the MTD, used in cleanup_module */
+ static LIST_HEAD(blkmtd_device_list);
+ 
++static int add_retry(const char *val)
++{
++	struct retry *r = kmalloc(sizeof(struct retry), GFP_KERNEL);
++
++	INIT_LIST_HEAD(&r->list);
++	r->val = val;
++	list_add(&r->list, &retry_list);
++
++	return 0;
++}
++
++static int __init process_retries(void)
++{
++	struct list_head *p, *tmp;
++
++	list_for_each_safe(p, tmp, &retry_list) {
++		struct retry *r = list_entry(p, struct retry, list);
++		block2mtd_setup2(r->val);
++		msleep(100);
++		list_del(p);
++		kfree(r);
++	}
++	return 0;
++}
++rootfs_initcall(process_retries);
+ 
+ static struct page *page_read(struct address_space *mapping, int index)
+ {
+@@ -518,7 +551,10 @@
+ 	if (token[2] && (strlen(token[2]) + 1 > 80))
+ 		parse_err("mtd device name too long");
+ 
+-	add_device(name, erase_size, token[2]);
++	if (add_device(name, erase_size, token[2]) == NULL) {
++		add_retry(val);
++		return 0;
++	}
+ 
+ 	return 0;
+ }
+@@ -534,8 +570,11 @@
+ 	   and block2mtd_init() has already been called,
+ 	   we can parse the argument now. */
+ 
+-	if (block2mtd_init_called)
++	if (block2mtd_init_called) {
++		/* if the call failed (e.g. because the device does not exist yet)
++		 * then try again just before attempting to mount the rootfs */
+ 		return block2mtd_setup2(val);
++	}
+ 
+ 	/* During early boot stage, we only save the parameters
+ 	   here. We must parse them later: if the param passed
+Index: linux-2.6.23/init/do_mounts.c
+===================================================================
+--- linux-2.6.23.orig/init/do_mounts.c	2007-10-25 21:39:41.824977672 +0200
++++ linux-2.6.23/init/do_mounts.c	2007-10-25 21:41:22.466712918 +0200
+@@ -241,16 +241,8 @@
+ 	return 1;
+ }
+ 
+-static unsigned int __initdata root_delay;
+-static int __init root_delay_setup(char *str)
+-{
+-	root_delay = simple_strtoul(str, NULL, 0);
+-	return 1;
+-}
+-
+ __setup("rootflags=", root_data_setup);
+ __setup("rootfstype=", fs_names_setup);
+-__setup("rootdelay=", root_delay_setup);
+ 
+ static void __init get_fs_names(char *page)
+ {
+@@ -426,18 +418,6 @@
+ {
+ 	int is_floppy;
+ 
+-	if (root_delay) {
+-		printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
+-		       root_delay);
+-		ssleep(root_delay);
+-	}
+-
+-	/* wait for the known devices to complete their probing */
+-	while (driver_probe_done() != 0)
+-		msleep(100);
+-
+-	md_run_setup();
+-
+ 	if (saved_root_name[0]) {
+ 		root_device_name = saved_root_name;
+ 		if (!strncmp(root_device_name, "mtd", 3)) {
+Index: linux-2.6.23/init/main.c
+===================================================================
+--- linux-2.6.23.orig/init/main.c	2007-10-25 21:35:50.567799083 +0200
++++ linux-2.6.23/init/main.c	2007-10-25 21:56:43.279187031 +0200
+@@ -65,6 +65,7 @@
+ #ifdef CONFIG_X86_LOCAL_APIC
+ #include <asm/smp.h>
+ #endif
++#include "do_mounts.h"
+ 
+ /*
+  * This is one of the first .c files built. Error out early if we have compiler
+@@ -662,13 +663,14 @@
+ __setup("initcall_debug", initcall_debug_setup);
+ 
+ extern initcall_t __initcall_start[], __initcall_end[];
++extern initcall_t __root_initcall_start[], __root_initcall_end[];
+ 
+-static void __init do_initcalls(void)
++static void __init do_initcalls(initcall_t *start, initcall_t *end)
+ {
+ 	initcall_t *call;
+ 	int count = preempt_count();
+ 
+-	for (call = __initcall_start; call < __initcall_end; call++) {
++	for (call = start; call < end; call++) {
+ 		ktime_t t0, t1, delta;
+ 		char *msg = NULL;
+ 		char msgbuf[40];
+@@ -737,7 +739,7 @@
+ 	usermodehelper_init();
+ 	driver_init();
+ 	init_irq_proc();
+-	do_initcalls();
++	do_initcalls(__initcall_start, __initcall_end);
+ }
+ 
+ static int __initdata nosoftlockup;
+@@ -810,6 +812,14 @@
+ 	panic("No init found.  Try passing init= option to kernel.");
+ }
+ 
++static unsigned int __initdata root_delay;
++static int __init root_delay_setup(char *str)
++{
++	root_delay = simple_strtoul(str, NULL, 0);
++	return 1;
++}
++__setup("rootdelay=", root_delay_setup);
++
+ static int __init kernel_init(void * unused)
+ {
+ 	lock_kernel();
+@@ -851,6 +861,17 @@
+ 
+ 	if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) {
+ 		ramdisk_execute_command = NULL;
++		if (root_delay) {
++			printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
++		       root_delay);
++			ssleep(root_delay);
++		}
++		/* wait for the known devices to complete their probing */
++		while (driver_probe_done() != 0)
++			msleep(100);
++		md_run_setup();
++		do_initcalls(__root_initcall_start, __root_initcall_end);
++
+ 		prepare_namespace();
+ 	}
+ 
+Index: linux-2.6.23/arch/i386/kernel/vmlinux.lds.S
+===================================================================
+--- linux-2.6.23.orig/arch/i386/kernel/vmlinux.lds.S	2007-10-26 00:07:08.465118962 +0200
++++ linux-2.6.23/arch/i386/kernel/vmlinux.lds.S	2007-10-26 00:10:15.259763782 +0200
+@@ -146,6 +146,11 @@
+ 	INITCALLS
+   	__initcall_end = .;
+   }
++  .root_initcall.init : AT(ADDR(.root_initcall.init) - LOAD_OFFSET) {
++  	__root_initcall_start = .;
++	INITCALLS_ROOT
++  	__root_initcall_end = .;
++  }
+   .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
+   	__con_initcall_start = .;
+ 	*(.con_initcall.init)
+Index: linux-2.6.23/include/asm-generic/vmlinux.lds.h
+===================================================================
+--- linux-2.6.23.orig/include/asm-generic/vmlinux.lds.h	2007-10-26 00:08:46.558708993 +0200
++++ linux-2.6.23/include/asm-generic/vmlinux.lds.h	2007-10-26 00:09:24.296859571 +0200
+@@ -243,12 +243,14 @@
+   	*(.initcall4s.init)						\
+   	*(.initcall5.init)						\
+   	*(.initcall5s.init)						\
+-	*(.initcallrootfs.init)						\
+   	*(.initcall6.init)						\
+   	*(.initcall6s.init)						\
+   	*(.initcall7.init)						\
+   	*(.initcall7s.init)
+ 
++#define INITCALLS_ROOT						\
++	*(.initcallrootfs.init)
++
+ #define PERCPU(align)							\
+ 	. = ALIGN(align);						\
+ 	__per_cpu_start = .;						\