diff options
| author | Dave Young <dyoung@redhat.com> | 2015-11-23 15:04:23 +0800 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2015-11-24 16:04:10 +0900 |
| commit | 4bad06c3cd2a989459458eadd78c703ac5a3b8b6 (patch) | |
| tree | 751d05ca599529d1c4eb1174777e5d5725812b3d /kexec | |
| parent | 4580c372000b469c4292e548c806dfe5922e97d1 (diff) | |
arm: use /sys/firmware/fdt in case without --atags and --dtb
Latest linux kernel will create /sys/firmware/fdt file. It will be convenient
to use it in case one does not specify --atags and --dtb options.
Signed-off-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'kexec')
| -rw-r--r-- | kexec/arch/arm/kexec-arm.c | 7 | ||||
| -rw-r--r-- | kexec/arch/arm/kexec-arm.h | 2 | ||||
| -rw-r--r-- | kexec/arch/arm/kexec-zImage-arm.c | 8 |
3 files changed, 17 insertions, 0 deletions
diff --git a/kexec/arch/arm/kexec-arm.c b/kexec/arch/arm/kexec-arm.c index 10035f2..4e90e69 100644 --- a/kexec/arch/arm/kexec-arm.c +++ b/kexec/arch/arm/kexec-arm.c @@ -12,6 +12,7 @@ #include <stdint.h> #include <string.h> #include <getopt.h> +#include <unistd.h> #include "../../kexec.h" #include "../../kexec-syscall.h" #include "kexec-arm.h" @@ -137,3 +138,9 @@ int arch_compat_trampoline(struct kexec_info *UNUSED(info)) void arch_update_purgatory(struct kexec_info *UNUSED(info)) { } + +/* return 1 if /sys/firmware/fdt exists, otherwise return 0 */ +int have_sysfs_fdt(void) +{ + return !access(SYSFS_FDT, F_OK); +} diff --git a/kexec/arch/arm/kexec-arm.h b/kexec/arch/arm/kexec-arm.h index 79663e3..a74cce2 100644 --- a/kexec/arch/arm/kexec-arm.h +++ b/kexec/arch/arm/kexec-arm.h @@ -3,6 +3,7 @@ #include <sys/types.h> +#define SYSFS_FDT "/sys/firmware/fdt" #define BOOT_BLOCK_VERSION 17 #define BOOT_BLOCK_LAST_COMP_VERSION 16 @@ -16,5 +17,6 @@ void zImage_arm_usage(void); int uImage_arm_probe(const char *buf, off_t len); int uImage_arm_load(int argc, char **argv, const char *buf, off_t len, struct kexec_info *info); +extern int have_sysfs_fdt(void); #endif /* KEXEC_ARM_H */ diff --git a/kexec/arch/arm/kexec-zImage-arm.c b/kexec/arch/arm/kexec-zImage-arm.c index d5b8ab4..d85ab9b 100644 --- a/kexec/arch/arm/kexec-zImage-arm.c +++ b/kexec/arch/arm/kexec-zImage-arm.c @@ -396,6 +396,14 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len, return -1; } + if (!use_atags && !dtb_file) { + int f; + + f = have_sysfs_fdt(); + if (f) + dtb_file = SYSFS_FDT; + } + if (command_line) { command_line_len = strlen(command_line) + 1; if (command_line_len > COMMAND_LINE_SIZE) |