[PATCH 08/10] introduce common bootstrap code
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Tue Jan 22 09:40:43 EST 2013
This will allow to have a generic code to create different bootstrap
As example
Barebox as TI Xloader
Barebox as AT91 Bootstrap
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
include/bootstrap.h | 34 ++++++++++++++
lib/Kconfig | 2 +
lib/Makefile | 1 +
lib/bootstrap/Kconfig | 13 ++++++
lib/bootstrap/Makefile | 3 ++
lib/bootstrap/common.c | 24 ++++++++++
lib/bootstrap/devfs.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++
lib/bootstrap/disk.c | 37 +++++++++++++++
8 files changed, 232 insertions(+)
create mode 100644 include/bootstrap.h
create mode 100644 lib/bootstrap/Kconfig
create mode 100644 lib/bootstrap/Makefile
create mode 100644 lib/bootstrap/common.c
create mode 100644 lib/bootstrap/devfs.c
create mode 100644 lib/bootstrap/disk.c
diff --git a/include/bootstrap.h b/include/bootstrap.h
new file mode 100644
index 0000000..0fa6b83
--- /dev/null
+++ b/include/bootstrap.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio at jcrosoft.com>
+ *
+ * Under GPLv2
+ */
+
+#ifndef __BOOSTRAP_H__
+#define __BOOSTRAP_H__
+
+#define bootstrap_err(fmt, arg...) printf(fmt, ##arg)
+
+void bootstrap_boot(int (*func)(void), bool barebox);
+
+#ifdef CONFIG_BOOTSTRAP_DEVFS
+void* bootstrap_read_devfs(char *devname, bool use_bb, int offset,
+ int default_size, int max_size);
+#else
+static inline void* bootstrap_read_devfs(char *devname, bool use_bb, int offset,
+ int default_size, int max_size)
+{
+ return NULL;
+}
+#endif
+
+#ifdef CONFIG_BOOTSTRAP_DISK
+void* bootstrap_read_disk(char *devname, char *fstype);
+#else
+static inline void* bootstrap_read_disk(char *devname, char *fstype)
+{
+ return NULL;
+}
+#endif
+
+#endif /* __BOOSTRAP_H__ */
diff --git a/lib/Kconfig b/lib/Kconfig
index db8a6ad..4578353 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -52,4 +52,6 @@ config LIBMTD
source lib/gui/Kconfig
+source lib/bootstrap/Kconfig
+
endmenu
diff --git a/lib/Makefile b/lib/Makefile
index 85f4ec9..43f6ea3 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_BOOTSTRAP) += bootstrap/
obj-y += ctype.o
obj-y += rbtree.o
obj-y += display_options.o
diff --git a/lib/bootstrap/Kconfig b/lib/bootstrap/Kconfig
new file mode 100644
index 0000000..558da00
--- /dev/null
+++ b/lib/bootstrap/Kconfig
@@ -0,0 +1,13 @@
+menuconfig BOOTSTRAP
+ bool "Library bootstrap routines "
+ depends on SHELL_NONE
+
+if BOOTSTRAP
+
+config BOOTSTRAP_DEVFS
+ bool "devfs support"
+
+config BOOTSTRAP_DISK
+ bool "disk support"
+
+endif
diff --git a/lib/bootstrap/Makefile b/lib/bootstrap/Makefile
new file mode 100644
index 0000000..cbaa49f
--- /dev/null
+++ b/lib/bootstrap/Makefile
@@ -0,0 +1,3 @@
+obj-y += common.o
+obj-$(CONFIG_BOOTSTRAP_DEVFS) += devfs.o
+obj-$(CONFIG_BOOTSTRAP_DISK) += disk.o
diff --git a/lib/bootstrap/common.c b/lib/bootstrap/common.c
new file mode 100644
index 0000000..38ec272
--- /dev/null
+++ b/lib/bootstrap/common.c
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2011 Sascha Hauer, Pengutronix
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio at jcrosoft.com>
+ *
+ * Under GPLv2
+ */
+
+#include <common.h>
+#include <bootstrap.h>
+#include <filetype.h>
+
+void bootstrap_boot(int (*func)(void), bool barebox)
+{
+ if (!func)
+ return;
+
+ if (barebox && !is_barebox_head((void*)func))
+ return;
+
+ shutdown_barebox();
+ func();
+
+ while (1);
+}
diff --git a/lib/bootstrap/devfs.c b/lib/bootstrap/devfs.c
new file mode 100644
index 0000000..25d07c7
--- /dev/null
+++ b/lib/bootstrap/devfs.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2011 Sascha Hauer, Pengutronix
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio at jcrosoft.com>
+ *
+ * Under GPLv2
+ */
+
+#include <common.h>
+#include <partition.h>
+#include <nand.h>
+#include <driver.h>
+#include <linux/mtd/mtd.h>
+#include <fcntl.h>
+#include <filetype.h>
+#include <sizes.h>
+#include <errno.h>
+#include <malloc.h>
+#include <bootstrap.h>
+
+#if defined(CONFIG_ARM) || defined(CONFIG_MIPS)
+#if defined(CONFIG_ARM)
+#define BAREBOX_HEAD_SIZE ARM_HEAD_SIZE
+#define BAREBOX_HEAD_SIZE_OFFSET ARM_HEAD_SIZE_OFFSET
+#elif defined(CONFIG_MIPS)
+#define BAREBOX_HEAD_SIZE MIPS_HEAD_SIZE
+#define BAREBOX_HEAD_SIZE_OFFSET MIPS_HEAD_SIZE_OFFSET
+#endif
+
+static void *read_image_head(const char *name)
+{
+ void *header = xmalloc(BAREBOX_HEAD_SIZE);
+ struct cdev *cdev;
+ int ret;
+
+ cdev = cdev_open(name, O_RDONLY);
+ if (!cdev) {
+ bootstrap_err("failed to open partition\n");
+ return NULL;
+ }
+
+ ret = cdev_read(cdev, header, BAREBOX_HEAD_SIZE, 0, 0);
+ cdev_close(cdev);
+
+ if (ret != BAREBOX_HEAD_SIZE) {
+ bootstrap_err("failed to read from partition\n");
+ return NULL;
+ }
+
+ return header;
+}
+
+static unsigned int get_image_size(void *head)
+{
+ unsigned int ret = 0;
+ unsigned int *psize = head + BAREBOX_HEAD_SIZE_OFFSET;
+
+ if (is_barebox_head(head))
+ ret = *psize;
+ debug("Detected barebox image size %u\n", ret);
+
+ return ret;
+}
+#else
+static void *read_image_head(const char *name)
+{
+ return NULL;
+}
+
+static unsigned int get_image_size(void *head)
+{
+ return 0;
+}
+#endif
+
+void* bootstrap_read_devfs(char *devname, bool use_bb, int offset,
+ int default_size, int max_size)
+{
+ int ret;
+ int size = 0;
+ void *to, *header;
+ struct cdev *cdev;
+ char *partname = "x";
+
+ devfs_add_partition(devname, offset, max_size, DEVFS_PARTITION_FIXED, partname);
+ if (use_bb) {
+ dev_add_bb_dev(partname, "bbx");
+ partname = "bbx";
+ }
+
+ header = read_image_head(partname);
+ if (header) {
+ size = get_image_size(header);
+ if (!size)
+ bootstrap_err("%s: failed to get image size\n", devname);
+ }
+
+ if (!size) {
+ size = default_size;
+ bootstrap_err("%s: failed to detect barebox and it's image size so use %d\n",
+ devname, size);
+ }
+
+ to = xmalloc(size);
+
+ cdev = cdev_open(partname, O_RDONLY);
+ if (!cdev) {
+ bootstrap_err("%s: failed to open %s\n", devname, partname);
+ return NULL;
+ }
+
+ ret = cdev_read(cdev, to, size, 0, 0);
+ if (ret != size) {
+ bootstrap_err("%s: failed to read from %s\n", devname, partname);
+ return NULL;
+ }
+
+ return to;
+}
diff --git a/lib/bootstrap/disk.c b/lib/bootstrap/disk.c
new file mode 100644
index 0000000..879d331
--- /dev/null
+++ b/lib/bootstrap/disk.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2011 Sascha Hauer, Pengutronix
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio at jcrosoft.com>
+ *
+ * Under GPLv2
+ */
+
+#include <common.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <sizes.h>
+#include <errno.h>
+#include <malloc.h>
+#include <bootstrap.h>
+
+void* bootstrap_read_disk(char *dev, char *fstype)
+{
+ int ret;
+ void *buf;
+ int len;
+ char *path = "/";
+
+ ret = mount(dev, fstype, path);
+ if (ret) {
+ bootstrap_err("mounting %s failed with %d\n", dev, ret);
+ return NULL;
+ }
+
+ buf = read_file("/barebox.bin", &len);
+ if (!buf) {
+ bootstrap_err("could not read barebox.bin from %s\n", dev);
+ umount(path);
+ return NULL;
+ }
+
+ return buf;
+}
--
1.7.10.4
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