From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.phycore.de ([217.6.246.34] helo=root.phytec.de) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1T9At0-0002OU-0a for barebox@lists.infradead.org; Wed, 05 Sep 2012 08:23:02 +0000 From: Jan Weitzel Date: Wed, 5 Sep 2012 10:22:30 +0200 Message-Id: <1346833350-9396-1-git-send-email-j.weitzel@phytec.de> In-Reply-To: <20120904143553.GA32603@game.jcrosoft.org> References: <20120904143553.GA32603@game.jcrosoft.org> 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-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v4] xload: get barebox size from barebox_arm_head To: barebox@lists.infradead.org Add functions to read the barebox_arm_head, check barebox magicword and read out the barebox image size. Create a inital partion of 1Mb to access the barebox image on nand. Signed-off-by: Jan Weitzel --- v2: remove fall back if header read fail v3: fix header check, rebase master v4: factorize barebox detection arch/arm/include/asm/barebox-arm-head.h | 9 +++++ arch/arm/mach-omap/include/mach/xload.h | 2 +- arch/arm/mach-omap/xload.c | 57 ++++++++++++++++++++++++++++-- common/filetype.c | 3 +- 4 files changed, 65 insertions(+), 6 deletions(-) diff --git a/arch/arm/include/asm/barebox-arm-head.h b/arch/arm/include/asm/barebox-arm-head.h index 2c250e9..42bd239 100644 --- a/arch/arm/include/asm/barebox-arm-head.h +++ b/arch/arm/include/asm/barebox-arm-head.h @@ -1,6 +1,15 @@ #ifndef __ASM_ARM_HEAD_H #define __ASM_ARM_HEAD_H +#define ARM_HEAD_SIZE 0x30 +#define HEAD_MAGICWORD_OFFSET 0x20 +#define HEAD_SIZE_OFFSET 0x2C + +static inline int is_barebox_arm_head(const char *head) +{ + return !strcmp(head + HEAD_MAGICWORD_OFFSET, "barebox"); +} + static inline void barebox_arm_head(void) { __asm__ __volatile__ ( diff --git a/arch/arm/mach-omap/include/mach/xload.h b/arch/arm/mach-omap/include/mach/xload.h index 844b57f..26f1b68 100644 --- a/arch/arm/mach-omap/include/mach/xload.h +++ b/arch/arm/mach-omap/include/mach/xload.h @@ -1,7 +1,7 @@ #ifndef _MACH_XLOAD_H #define _MACH_XLOAD_H -void *omap_xload_boot_nand(int offset, int size); +void *omap_xload_boot_nand(int offset); void *omap_xload_boot_mmc(void); enum omap_boot_src { diff --git a/arch/arm/mach-omap/xload.c b/arch/arm/mach-omap/xload.c index 13024ab..5f9ca26 100644 --- a/arch/arm/mach-omap/xload.c +++ b/arch/arm/mach-omap/xload.c @@ -7,16 +7,65 @@ #include #include #include +#include -void *omap_xload_boot_nand(int offset, int size) +void *read_image_head(const char *name) { + void *header = xmalloc(ARM_HEAD_SIZE); + struct cdev *cdev; int ret; - void *to = xmalloc(size); + + cdev = cdev_open(name, O_RDONLY); + if (!cdev) { + printf("failed to open partition\n"); + return NULL; + } + + ret = cdev_read(cdev, header, ARM_HEAD_SIZE, 0, 0); + cdev_close(cdev); + + if (ret != ARM_HEAD_SIZE) { + printf("failed to read from partition\n"); + return NULL; + } + + return header; +} + +unsigned int get_image_size(void *head) +{ + unsigned int ret = 0; + unsigned int *psize = head + HEAD_SIZE_OFFSET; + + if (is_barebox_arm_head(head)) + ret = *psize; + debug("Detected barebox image size %u\n", ret); + + return ret; +} + +void *omap_xload_boot_nand(int offset) +{ + int ret; + int size; + void *to, *header; struct cdev *cdev; - devfs_add_partition("nand0", offset, size, DEVFS_PARTITION_FIXED, "x"); + devfs_add_partition("nand0", offset, SZ_1M, DEVFS_PARTITION_FIXED, "x"); dev_add_bb_dev("x", "bbx"); + header = read_image_head("bbx"); + if (header == NULL) + return NULL; + + size = get_image_size(header); + if (!size) { + printf("failed to get image size\n"); + return NULL; + } + + to = xmalloc(size); + cdev = cdev_open("bbx", O_RDONLY); if (!cdev) { printf("failed to open nand\n"); @@ -80,7 +129,7 @@ int run_shell(void) printf("unknown boot source. Fall back to nand\n"); case OMAP_BOOTSRC_NAND: printf("booting from NAND\n"); - func = omap_xload_boot_nand(SZ_128K, SZ_256K); + func = omap_xload_boot_nand(SZ_128K); break; } diff --git a/common/filetype.c b/common/filetype.c index 1a5b82d..a95e4fd 100644 --- a/common/filetype.c +++ b/common/filetype.c @@ -25,6 +25,7 @@ #include #include #include +#include "../arch/arm/include/asm/barebox-arm-head.h" static const char *filetype_str[] = { [filetype_unknown] = "unknown", @@ -57,7 +58,7 @@ enum filetype file_detect_type(void *_buf) if (strncmp(buf8, "#!/bin/sh", 9) == 0) return filetype_sh; - if (buf[8] == 0x65726162 && buf[9] == 0x00786f62) + if (is_barebox_arm_head(_buf)) return filetype_arm_barebox; if (buf[9] == 0x016f2818 || buf[9] == 0x18286f01) return filetype_arm_zimage; -- 1.7.0.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox