From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wj0-x241.google.com ([2a00:1450:400c:c01::241]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cDplu-0002AY-Lo for barebox@lists.infradead.org; Mon, 05 Dec 2016 09:41:30 +0000 Received: by mail-wj0-x241.google.com with SMTP id kp2so38280808wjc.0 for ; Mon, 05 Dec 2016 01:40:58 -0800 (PST) From: Antony Pavlov Date: Mon, 5 Dec 2016 12:40:31 +0300 Message-Id: <20161205094033.31569-7-antonynpavlov@gmail.com> In-Reply-To: <20161205094033.31569-1-antonynpavlov@gmail.com> References: <20161205094033.31569-1-antonynpavlov@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [RFC v2 6/8] bootm: add kexec ELF support To: barebox@lists.infradead.org Also introduce reboot() for starting already loaded via kexec ELF segments. Signed-off-by: Antony Pavlov --- 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 +#include +#include +#include +#include +#include + +#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 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox