1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_SH_KEXEC_H 3 #define __ASM_SH_KEXEC_H 4 5 #include <asm/ptrace.h> 6 #include <asm/string.h> 7 8 /* 9 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return. 10 * I.e. Maximum page that is mapped directly into kernel memory, 11 * and kmap is not required. 12 * 13 * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct 14 * calculation for the amount of memory directly mappable into the 15 * kernel memory space. 16 */ 17 18 /* Maximum physical address we can use pages from */ 19 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) 20 /* Maximum address we can reach in physical address mode */ 21 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) 22 /* Maximum address we can use for the control code buffer */ 23 #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE 24 25 #define KEXEC_CONTROL_PAGE_SIZE 4096 26 27 /* The native architecture */ 28 #define KEXEC_ARCH KEXEC_ARCH_SH 29 30 #ifdef CONFIG_KEXEC 31 /* arch/sh/kernel/machine_kexec.c */ 32 void reserve_crashkernel(void); 33 34 static inline void crash_setup_regs(struct pt_regs *newregs, 35 struct pt_regs *oldregs) 36 { 37 if (oldregs) 38 memcpy(newregs, oldregs, sizeof(*newregs)); 39 else { 40 __asm__ __volatile__ ("mov r0, %0" : "=r" (newregs->regs[0])); 41 __asm__ __volatile__ ("mov r1, %0" : "=r" (newregs->regs[1])); 42 __asm__ __volatile__ ("mov r2, %0" : "=r" (newregs->regs[2])); 43 __asm__ __volatile__ ("mov r3, %0" : "=r" (newregs->regs[3])); 44 __asm__ __volatile__ ("mov r4, %0" : "=r" (newregs->regs[4])); 45 __asm__ __volatile__ ("mov r5, %0" : "=r" (newregs->regs[5])); 46 __asm__ __volatile__ ("mov r6, %0" : "=r" (newregs->regs[6])); 47 __asm__ __volatile__ ("mov r7, %0" : "=r" (newregs->regs[7])); 48 __asm__ __volatile__ ("mov r8, %0" : "=r" (newregs->regs[8])); 49 __asm__ __volatile__ ("mov r9, %0" : "=r" (newregs->regs[9])); 50 __asm__ __volatile__ ("mov r10, %0" : "=r" (newregs->regs[10])); 51 __asm__ __volatile__ ("mov r11, %0" : "=r" (newregs->regs[11])); 52 __asm__ __volatile__ ("mov r12, %0" : "=r" (newregs->regs[12])); 53 __asm__ __volatile__ ("mov r13, %0" : "=r" (newregs->regs[13])); 54 __asm__ __volatile__ ("mov r14, %0" : "=r" (newregs->regs[14])); 55 __asm__ __volatile__ ("mov r15, %0" : "=r" (newregs->regs[15])); 56 57 __asm__ __volatile__ ("sts pr, %0" : "=r" (newregs->pr)); 58 __asm__ __volatile__ ("sts macl, %0" : "=r" (newregs->macl)); 59 __asm__ __volatile__ ("sts mach, %0" : "=r" (newregs->mach)); 60 61 __asm__ __volatile__ ("stc gbr, %0" : "=r" (newregs->gbr)); 62 __asm__ __volatile__ ("stc sr, %0" : "=r" (newregs->sr)); 63 64 newregs->pc = (unsigned long)current_text_addr(); 65 } 66 } 67 #else 68 static inline void reserve_crashkernel(void) { } 69 #endif /* CONFIG_KEXEC */ 70 71 #endif /* __ASM_SH_KEXEC_H */ 72