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 #include <linux/kernel.h> 8 9 /* 10 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return. 11 * I.e. Maximum page that is mapped directly into kernel memory, 12 * and kmap is not required. 13 * 14 * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct 15 * calculation for the amount of memory directly mappable into the 16 * kernel memory space. 17 */ 18 19 /* Maximum physical address we can use pages from */ 20 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) 21 /* Maximum address we can reach in physical address mode */ 22 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) 23 /* Maximum address we can use for the control code buffer */ 24 #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE 25 26 #define KEXEC_CONTROL_PAGE_SIZE 4096 27 28 /* The native architecture */ 29 #define KEXEC_ARCH KEXEC_ARCH_SH 30 31 #ifdef CONFIG_KEXEC 32 /* arch/sh/kernel/machine_kexec.c */ 33 void reserve_crashkernel(void); 34 35 static inline void crash_setup_regs(struct pt_regs *newregs, 36 struct pt_regs *oldregs) 37 { 38 if (oldregs) 39 memcpy(newregs, oldregs, sizeof(*newregs)); 40 else { 41 __asm__ __volatile__ ("mov r0, %0" : "=r" (newregs->regs[0])); 42 __asm__ __volatile__ ("mov r1, %0" : "=r" (newregs->regs[1])); 43 __asm__ __volatile__ ("mov r2, %0" : "=r" (newregs->regs[2])); 44 __asm__ __volatile__ ("mov r3, %0" : "=r" (newregs->regs[3])); 45 __asm__ __volatile__ ("mov r4, %0" : "=r" (newregs->regs[4])); 46 __asm__ __volatile__ ("mov r5, %0" : "=r" (newregs->regs[5])); 47 __asm__ __volatile__ ("mov r6, %0" : "=r" (newregs->regs[6])); 48 __asm__ __volatile__ ("mov r7, %0" : "=r" (newregs->regs[7])); 49 __asm__ __volatile__ ("mov r8, %0" : "=r" (newregs->regs[8])); 50 __asm__ __volatile__ ("mov r9, %0" : "=r" (newregs->regs[9])); 51 __asm__ __volatile__ ("mov r10, %0" : "=r" (newregs->regs[10])); 52 __asm__ __volatile__ ("mov r11, %0" : "=r" (newregs->regs[11])); 53 __asm__ __volatile__ ("mov r12, %0" : "=r" (newregs->regs[12])); 54 __asm__ __volatile__ ("mov r13, %0" : "=r" (newregs->regs[13])); 55 __asm__ __volatile__ ("mov r14, %0" : "=r" (newregs->regs[14])); 56 __asm__ __volatile__ ("mov r15, %0" : "=r" (newregs->regs[15])); 57 58 __asm__ __volatile__ ("sts pr, %0" : "=r" (newregs->pr)); 59 __asm__ __volatile__ ("sts macl, %0" : "=r" (newregs->macl)); 60 __asm__ __volatile__ ("sts mach, %0" : "=r" (newregs->mach)); 61 62 __asm__ __volatile__ ("stc gbr, %0" : "=r" (newregs->gbr)); 63 __asm__ __volatile__ ("stc sr, %0" : "=r" (newregs->sr)); 64 65 newregs->pc = _THIS_IP_; 66 } 67 } 68 #else 69 static inline void reserve_crashkernel(void) { } 70 #endif /* CONFIG_KEXEC */ 71 72 #endif /* __ASM_SH_KEXEC_H */ 73