4cd9d6f774
Currently, the atags used by kexec are fixed to the ones originally used to boot the kernel. This is less than ideal as changing the commandline, initrd and other options would be a useful feature. This patch exports the atags used for the current kernel to userspace through an "atags" file in procfs. The presence of the file is controlled by its own Kconfig option and cleans up several ifdef blocks into a separate file. The tags for the new kernel are assumed to be at a fixed location before the kernel image itself. The location of the tags used to boot the original kernel is unimportant and no longer saved. Based on a patch from Uli Luckas <u.luckas@road.de> Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Acked-by: Uli Luckas <u.luckas@road.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
34 lines
866 B
C
34 lines
866 B
C
#ifndef _ARM_KEXEC_H
|
|
#define _ARM_KEXEC_H
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
|
|
/* Maximum physical address we can use pages from */
|
|
#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can reach in physical address mode */
|
|
#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can use for the control code buffer */
|
|
#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
|
|
|
|
#define KEXEC_CONTROL_CODE_SIZE 4096
|
|
|
|
#define KEXEC_ARCH KEXEC_ARCH_ARM
|
|
|
|
#define KEXEC_BOOT_PARAMS_SIZE 1536
|
|
|
|
#define KEXEC_ARM_ATAGS_OFFSET 0x1000
|
|
#define KEXEC_ARM_ZIMAGE_OFFSET 0x8000
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct kimage;
|
|
/* Provide a dummy definition to avoid build failures. */
|
|
static inline void crash_setup_regs(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs) { }
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* CONFIG_KEXEC */
|
|
|
|
#endif /* _ARM_KEXEC_H */
|