/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_SH_KEXEC_H
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#define __ASM_SH_KEXEC_H
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#include <asm/ptrace.h>
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#include <asm/string.h>
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#include <linux/kernel.h>
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/*
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* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
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* I.e. Maximum page that is mapped directly into kernel memory,
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* and kmap is not required.
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*
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* Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct
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* calculation for the amount of memory directly mappable into the
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* kernel memory space.
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*/
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/* Maximum physical address we can use pages from */
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#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
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/* Maximum address we can reach in physical address mode */
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#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
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/* Maximum address we can use for the control code buffer */
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#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
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#define KEXEC_CONTROL_PAGE_SIZE 4096
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/* The native architecture */
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#define KEXEC_ARCH KEXEC_ARCH_SH
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#ifdef CONFIG_KEXEC
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/* arch/sh/kernel/machine_kexec.c */
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void reserve_crashkernel(void);
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static inline void crash_setup_regs(struct pt_regs *newregs,
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struct pt_regs *oldregs)
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{
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if (oldregs)
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memcpy(newregs, oldregs, sizeof(*newregs));
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else {
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__asm__ __volatile__ ("mov r0, %0" : "=r" (newregs->regs[0]));
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__asm__ __volatile__ ("mov r1, %0" : "=r" (newregs->regs[1]));
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__asm__ __volatile__ ("mov r2, %0" : "=r" (newregs->regs[2]));
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__asm__ __volatile__ ("mov r3, %0" : "=r" (newregs->regs[3]));
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__asm__ __volatile__ ("mov r4, %0" : "=r" (newregs->regs[4]));
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__asm__ __volatile__ ("mov r5, %0" : "=r" (newregs->regs[5]));
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__asm__ __volatile__ ("mov r6, %0" : "=r" (newregs->regs[6]));
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__asm__ __volatile__ ("mov r7, %0" : "=r" (newregs->regs[7]));
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__asm__ __volatile__ ("mov r8, %0" : "=r" (newregs->regs[8]));
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__asm__ __volatile__ ("mov r9, %0" : "=r" (newregs->regs[9]));
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__asm__ __volatile__ ("mov r10, %0" : "=r" (newregs->regs[10]));
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__asm__ __volatile__ ("mov r11, %0" : "=r" (newregs->regs[11]));
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__asm__ __volatile__ ("mov r12, %0" : "=r" (newregs->regs[12]));
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__asm__ __volatile__ ("mov r13, %0" : "=r" (newregs->regs[13]));
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__asm__ __volatile__ ("mov r14, %0" : "=r" (newregs->regs[14]));
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__asm__ __volatile__ ("mov r15, %0" : "=r" (newregs->regs[15]));
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__asm__ __volatile__ ("sts pr, %0" : "=r" (newregs->pr));
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__asm__ __volatile__ ("sts macl, %0" : "=r" (newregs->macl));
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__asm__ __volatile__ ("sts mach, %0" : "=r" (newregs->mach));
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__asm__ __volatile__ ("stc gbr, %0" : "=r" (newregs->gbr));
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__asm__ __volatile__ ("stc sr, %0" : "=r" (newregs->sr));
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newregs->pc = _THIS_IP_;
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}
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}
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#else
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static inline void reserve_crashkernel(void) { }
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#endif /* CONFIG_KEXEC */
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#endif /* __ASM_SH_KEXEC_H */
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