From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [RFC v2 6/8] bootm: add kexec ELF support
Date: Mon, 5 Dec 2016 12:40:31 +0300 [thread overview]
Message-ID: <20161205094033.31569-7-antonynpavlov@gmail.com> (raw)
In-Reply-To: <20161205094033.31569-1-antonynpavlov@gmail.com>
Also introduce reboot() for starting already loaded
via kexec ELF segments.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
include/linux/reboot.h | 14 ++++++++++++++
lib/kexec/Makefile | 1 +
lib/kexec/kexec-bootm-elf.c | 37 +++++++++++++++++++++++++++++++++++++
3 files changed, 52 insertions(+)
diff --git a/include/linux/reboot.h b/include/linux/reboot.h
new file mode 100644
index 0000000..454ed33
--- /dev/null
+++ b/include/linux/reboot.h
@@ -0,0 +1,14 @@
+#ifndef _LINUX_REBOOT_H
+#define _LINUX_REBOOT_H
+
+/*
+ * Commands accepted by the _reboot() system call.
+ *
+ * KEXEC Restart system using a previously loaded Linux kernel
+ */
+
+#define LINUX_REBOOT_CMD_KEXEC 0x45584543
+
+extern int reboot(int cmd);
+
+#endif /* _LINUX_REBOOT_H */
diff --git a/lib/kexec/Makefile b/lib/kexec/Makefile
index 8febef1..2f3dc1d 100644
--- a/lib/kexec/Makefile
+++ b/lib/kexec/Makefile
@@ -1,3 +1,4 @@
obj-y += kexec.o
obj-y += kexec-elf.o
obj-y += kexec-elf-exec.o
+obj-y += kexec-bootm-elf.o
diff --git a/lib/kexec/kexec-bootm-elf.c b/lib/kexec/kexec-bootm-elf.c
new file mode 100644
index 0000000..ceef6c7
--- /dev/null
+++ b/lib/kexec/kexec-bootm-elf.c
@@ -0,0 +1,37 @@
+#include <bootm.h>
+#include <init.h>
+#include <binfmt.h>
+#include <errno.h>
+#include <linux/reboot.h>
+#include <environment.h>
+
+#include "kexec.h"
+
+static int do_bootm_elf(struct image_data *data)
+{
+ kexec_load_file(data->os_file, 0);
+ setenv("global.bootm.image", data->os_file);
+ reboot(LINUX_REBOOT_CMD_KEXEC);
+
+ return -ERESTARTSYS;
+}
+
+static struct image_handler elf_handler = {
+ .name = "ELF",
+ .bootm = do_bootm_elf,
+ .filetype = filetype_elf,
+};
+
+static struct binfmt_hook binfmt_elf_hook = {
+ .type = filetype_elf,
+ .exec = "bootm",
+};
+
+static int elf_register_image_handler(void)
+{
+ register_image_handler(&elf_handler);
+ binfmt_register(&binfmt_elf_hook);
+
+ return 0;
+}
+late_initcall(elf_register_image_handler);
--
2.10.2
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next prev parent reply other threads:[~2016-12-05 9:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-05 9:40 [RFC v2 0/8] MIPS: use kexec to load ELF linux images Antony Pavlov
2016-12-05 9:40 ` [RFC v2 1/8] MIPS: add virt_to_phys() and phys_to_virt() Antony Pavlov
2016-12-05 9:40 ` [RFC v2 2/8] MIPS: c-r4k: add support for secondary cache Antony Pavlov
2016-12-05 9:40 ` [RFC v2 3/8] resource: add create_resource() helper function Antony Pavlov
2016-12-05 9:40 ` [RFC v2 4/8] import initial kexec stuff Antony Pavlov
2016-12-07 19:47 ` Sascha Hauer
2016-12-08 7:24 ` Antony Pavlov
2016-12-05 9:40 ` [RFC v2 5/8] filetype: add ELF type Antony Pavlov
2016-12-05 9:40 ` Antony Pavlov [this message]
2016-12-07 19:59 ` [RFC v2 6/8] bootm: add kexec ELF support Sascha Hauer
2016-12-08 7:29 ` Antony Pavlov
2016-12-05 9:40 ` [RFC v2 7/8] MIPS: add kexec ELF loading support Antony Pavlov
2016-12-05 9:40 ` [RFC v2 8/8] MIPS: malta: enable kexec Antony Pavlov
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