| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 */ |