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Directory :  /proc/self/root/lib/modules/5.4.0-163-generic/build/arch/sh/include/asm/

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Current File : /proc/self/root/lib/modules/5.4.0-163-generic/build/arch/sh/include/asm/kexec.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_KEXEC_H
#define __ASM_SH_KEXEC_H

#include <asm/ptrace.h>
#include <asm/string.h>
#include <linux/kernel.h>

/*
 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
 * I.e. Maximum page that is mapped directly into kernel memory,
 * and kmap is not required.
 *
 * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct
 * calculation for the amount of memory directly mappable into the
 * kernel memory space.
 */

/* 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_PAGE_SIZE	4096

/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_SH

#ifdef CONFIG_KEXEC
/* arch/sh/kernel/machine_kexec.c */
void reserve_crashkernel(void);

static inline void crash_setup_regs(struct pt_regs *newregs,
				    struct pt_regs *oldregs)
{
	if (oldregs)
		memcpy(newregs, oldregs, sizeof(*newregs));
	else {
		__asm__ __volatile__ ("mov r0, %0" : "=r" (newregs->regs[0]));
		__asm__ __volatile__ ("mov r1, %0" : "=r" (newregs->regs[1]));
		__asm__ __volatile__ ("mov r2, %0" : "=r" (newregs->regs[2]));
		__asm__ __volatile__ ("mov r3, %0" : "=r" (newregs->regs[3]));
		__asm__ __volatile__ ("mov r4, %0" : "=r" (newregs->regs[4]));
		__asm__ __volatile__ ("mov r5, %0" : "=r" (newregs->regs[5]));
		__asm__ __volatile__ ("mov r6, %0" : "=r" (newregs->regs[6]));
		__asm__ __volatile__ ("mov r7, %0" : "=r" (newregs->regs[7]));
		__asm__ __volatile__ ("mov r8, %0" : "=r" (newregs->regs[8]));
		__asm__ __volatile__ ("mov r9, %0" : "=r" (newregs->regs[9]));
		__asm__ __volatile__ ("mov r10, %0" : "=r" (newregs->regs[10]));
		__asm__ __volatile__ ("mov r11, %0" : "=r" (newregs->regs[11]));
		__asm__ __volatile__ ("mov r12, %0" : "=r" (newregs->regs[12]));
		__asm__ __volatile__ ("mov r13, %0" : "=r" (newregs->regs[13]));
		__asm__ __volatile__ ("mov r14, %0" : "=r" (newregs->regs[14]));
		__asm__ __volatile__ ("mov r15, %0" : "=r" (newregs->regs[15]));

		__asm__ __volatile__ ("sts pr, %0" : "=r" (newregs->pr));
		__asm__ __volatile__ ("sts macl, %0" : "=r" (newregs->macl));
		__asm__ __volatile__ ("sts mach, %0" : "=r" (newregs->mach));

		__asm__ __volatile__ ("stc gbr, %0" : "=r" (newregs->gbr));
		__asm__ __volatile__ ("stc sr, %0" : "=r" (newregs->sr));

		newregs->pc = _THIS_IP_;
	}
}
#else
static inline void reserve_crashkernel(void) { }
#endif /* CONFIG_KEXEC */

#endif /* __ASM_SH_KEXEC_H */

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