kexec.h

Go to the documentation of this file.

#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 (-1UL)

#define KEXEC_CONTROL_PAGE_SIZE 4096

#define KEXEC_ARCH KEXEC_ARCH_ARM

#define KEXEC_ARM_ATAGS_OFFSET  0x1000
#define KEXEC_ARM_ZIMAGE_OFFSET 0x8000

#ifndef __ASSEMBLY__

static inline void crash_setup_regs(struct pt_regs *newregs,
                    struct pt_regs *oldregs)
{
    if (oldregs) {
        memcpy(newregs, oldregs, sizeof(*newregs));
    } else {
        __asm__ __volatile__ (
            "stmia  %[regs_base], {r0-r12}\n\t"
            "mov    %[_ARM_sp], sp\n\t"
            "str    lr, %[_ARM_lr]\n\t"
            "adr    %[_ARM_pc], 1f\n\t"
            "mrs    %[_ARM_cpsr], cpsr\n\t"
        "1:"
            : [_ARM_pc] "=r" (newregs->ARM_pc),
              [_ARM_cpsr] "=r" (newregs->ARM_cpsr),
              [_ARM_sp] "=r" (newregs->ARM_sp),
              [_ARM_lr] "=o" (newregs->ARM_lr)
            : [regs_base] "r" (&newregs->ARM_r0)
            : "memory"
        );
    }
}

/* Function pointer to optional machine-specific reinitialization */
extern void (*kexec_reinit)(void);

#endif /* __ASSEMBLY__ */

#endif /* CONFIG_KEXEC */

#endif /* _ARM_KEXEC_H */