kexec.h (4820B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_POWERPC_KEXEC_H 3#define _ASM_POWERPC_KEXEC_H 4#ifdef __KERNEL__ 5 6#if defined(CONFIG_FSL_BOOKE) || defined(CONFIG_44x) 7 8/* 9 * On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory 10 * and therefore we can only deal with memory within this range 11 */ 12#define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) 13#define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) 14#define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) 15 16#else 17 18/* 19 * Maximum page that is mapped directly into kernel memory. 20 * XXX: Since we copy virt we can use any page we allocate 21 */ 22#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) 23 24/* 25 * Maximum address we can reach in physical address mode. 26 * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR. 27 */ 28#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) 29 30/* Maximum address we can use for the control code buffer */ 31#ifdef __powerpc64__ 32#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) 33#else 34/* TASK_SIZE, probably left over from use_mm ?? */ 35#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE 36#endif 37#endif 38 39#define KEXEC_CONTROL_PAGE_SIZE 4096 40 41/* The native architecture */ 42#ifdef __powerpc64__ 43#define KEXEC_ARCH KEXEC_ARCH_PPC64 44#else 45#define KEXEC_ARCH KEXEC_ARCH_PPC 46#endif 47 48#define KEXEC_STATE_NONE 0 49#define KEXEC_STATE_IRQS_OFF 1 50#define KEXEC_STATE_REAL_MODE 2 51 52#ifndef __ASSEMBLY__ 53#include <asm/reg.h> 54 55typedef void (*crash_shutdown_t)(void); 56 57#ifdef CONFIG_KEXEC_CORE 58 59/* 60 * This function is responsible for capturing register states if coming 61 * via panic or invoking dump using sysrq-trigger. 62 */ 63static inline void crash_setup_regs(struct pt_regs *newregs, 64 struct pt_regs *oldregs) 65{ 66 if (oldregs) 67 memcpy(newregs, oldregs, sizeof(*newregs)); 68 else 69 ppc_save_regs(newregs); 70} 71 72extern void kexec_smp_wait(void); /* get and clear naca physid, wait for 73 master to copy new code to 0 */ 74extern int crashing_cpu; 75extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); 76extern void crash_ipi_callback(struct pt_regs *); 77extern int crash_wake_offline; 78 79struct kimage; 80struct pt_regs; 81extern void default_machine_kexec(struct kimage *image); 82extern void default_machine_crash_shutdown(struct pt_regs *regs); 83extern int crash_shutdown_register(crash_shutdown_t handler); 84extern int crash_shutdown_unregister(crash_shutdown_t handler); 85 86extern void crash_kexec_secondary(struct pt_regs *regs); 87int __init overlaps_crashkernel(unsigned long start, unsigned long size); 88extern void reserve_crashkernel(void); 89extern void machine_kexec_mask_interrupts(void); 90 91static inline bool kdump_in_progress(void) 92{ 93 return crashing_cpu >= 0; 94} 95 96void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer, 97 unsigned long start_address) __noreturn; 98 99void kexec_copy_flush(struct kimage *image); 100 101#ifdef CONFIG_KEXEC_FILE 102extern const struct kexec_file_ops kexec_elf64_ops; 103 104#define ARCH_HAS_KIMAGE_ARCH 105 106struct kimage_arch { 107 struct crash_mem *exclude_ranges; 108 109 unsigned long backup_start; 110 void *backup_buf; 111 void *fdt; 112}; 113 114char *setup_kdump_cmdline(struct kimage *image, char *cmdline, 115 unsigned long cmdline_len); 116int setup_purgatory(struct kimage *image, const void *slave_code, 117 const void *fdt, unsigned long kernel_load_addr, 118 unsigned long fdt_load_addr); 119 120#ifdef CONFIG_PPC64 121struct kexec_buf; 122 123int load_crashdump_segments_ppc64(struct kimage *image, 124 struct kexec_buf *kbuf); 125int setup_purgatory_ppc64(struct kimage *image, const void *slave_code, 126 const void *fdt, unsigned long kernel_load_addr, 127 unsigned long fdt_load_addr); 128unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image); 129int setup_new_fdt_ppc64(const struct kimage *image, void *fdt, 130 unsigned long initrd_load_addr, 131 unsigned long initrd_len, const char *cmdline); 132#endif /* CONFIG_PPC64 */ 133 134#endif /* CONFIG_KEXEC_FILE */ 135 136#else /* !CONFIG_KEXEC_CORE */ 137static inline void crash_kexec_secondary(struct pt_regs *regs) { } 138 139static inline int overlaps_crashkernel(unsigned long start, unsigned long size) 140{ 141 return 0; 142} 143 144static inline void reserve_crashkernel(void) { ; } 145 146static inline int crash_shutdown_register(crash_shutdown_t handler) 147{ 148 return 0; 149} 150 151static inline int crash_shutdown_unregister(crash_shutdown_t handler) 152{ 153 return 0; 154} 155 156static inline bool kdump_in_progress(void) 157{ 158 return false; 159} 160 161static inline void crash_ipi_callback(struct pt_regs *regs) { } 162 163static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)) 164{ 165} 166 167#endif /* CONFIG_KEXEC_CORE */ 168 169#ifdef CONFIG_PPC_BOOK3S_64 170#include <asm/book3s/64/kexec.h> 171#endif 172 173#ifndef reset_sprs 174#define reset_sprs reset_sprs 175static inline void reset_sprs(void) 176{ 177} 178#endif 179 180#endif /* ! __ASSEMBLY__ */ 181#endif /* __KERNEL__ */ 182#endif /* _ASM_POWERPC_KEXEC_H */