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_PPC_85xx) || 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 55 typedef void (*crash_shutdown_t)(void); 56 57 #ifdef CONFIG_KEXEC_CORE 58 struct kimage; 59 struct pt_regs; 60 61 extern void kexec_smp_wait(void); /* get and clear naca physid, wait for 62 master to copy new code to 0 */ 63 extern void default_machine_kexec(struct kimage *image); 64 extern void machine_kexec_mask_interrupts(void); 65 66 void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer, 67 unsigned long start_address) __noreturn; 68 void kexec_copy_flush(struct kimage *image); 69 70 #ifdef CONFIG_KEXEC_FILE 71 extern const struct kexec_file_ops kexec_elf64_ops; 72 73 #define ARCH_HAS_KIMAGE_ARCH 74 75 struct kimage_arch { 76 struct crash_mem *exclude_ranges; 77 78 unsigned long backup_start; 79 void *backup_buf; 80 void *fdt; 81 }; 82 83 char *setup_kdump_cmdline(struct kimage *image, char *cmdline, 84 unsigned long cmdline_len); 85 int setup_purgatory(struct kimage *image, const void *slave_code, 86 const void *fdt, unsigned long kernel_load_addr, 87 unsigned long fdt_load_addr); 88 89 #ifdef CONFIG_PPC64 90 struct kexec_buf; 91 92 int arch_kexec_kernel_image_probe(struct kimage *image, void *buf, unsigned long buf_len); 93 #define arch_kexec_kernel_image_probe arch_kexec_kernel_image_probe 94 95 int arch_kimage_file_post_load_cleanup(struct kimage *image); 96 #define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup 97 98 int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf); 99 #define arch_kexec_locate_mem_hole arch_kexec_locate_mem_hole 100 101 int load_crashdump_segments_ppc64(struct kimage *image, 102 struct kexec_buf *kbuf); 103 int setup_purgatory_ppc64(struct kimage *image, const void *slave_code, 104 const void *fdt, unsigned long kernel_load_addr, 105 unsigned long fdt_load_addr); 106 unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image); 107 int setup_new_fdt_ppc64(const struct kimage *image, void *fdt, 108 unsigned long initrd_load_addr, 109 unsigned long initrd_len, const char *cmdline); 110 #endif /* CONFIG_PPC64 */ 111 112 #endif /* CONFIG_KEXEC_FILE */ 113 114 #endif /* CONFIG_KEXEC_CORE */ 115 116 #ifdef CONFIG_CRASH_RESERVE 117 int __init overlaps_crashkernel(unsigned long start, unsigned long size); 118 extern void reserve_crashkernel(void); 119 #else 120 static inline void reserve_crashkernel(void) {} 121 static inline int overlaps_crashkernel(unsigned long start, unsigned long size) { return 0; } 122 #endif 123 124 #if defined(CONFIG_CRASH_DUMP) 125 /* 126 * This function is responsible for capturing register states if coming 127 * via panic or invoking dump using sysrq-trigger. 128 */ 129 static inline void crash_setup_regs(struct pt_regs *newregs, 130 struct pt_regs *oldregs) 131 { 132 if (oldregs) 133 memcpy(newregs, oldregs, sizeof(*newregs)); 134 else 135 ppc_save_regs(newregs); 136 } 137 138 #ifdef CONFIG_CRASH_HOTPLUG 139 void arch_crash_handle_hotplug_event(struct kimage *image, void *arg); 140 #define arch_crash_handle_hotplug_event arch_crash_handle_hotplug_event 141 142 int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags); 143 #define arch_crash_hotplug_support arch_crash_hotplug_support 144 145 unsigned int arch_crash_get_elfcorehdr_size(void); 146 #define crash_get_elfcorehdr_size arch_crash_get_elfcorehdr_size 147 #endif /* CONFIG_CRASH_HOTPLUG */ 148 149 extern int crashing_cpu; 150 extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); 151 extern void crash_ipi_callback(struct pt_regs *regs); 152 extern int crash_wake_offline; 153 154 extern int crash_shutdown_register(crash_shutdown_t handler); 155 extern int crash_shutdown_unregister(crash_shutdown_t handler); 156 extern void default_machine_crash_shutdown(struct pt_regs *regs); 157 158 extern void crash_kexec_prepare(void); 159 extern void crash_kexec_secondary(struct pt_regs *regs); 160 161 static inline bool kdump_in_progress(void) 162 { 163 return crashing_cpu >= 0; 164 } 165 166 bool is_kdump_kernel(void); 167 #define is_kdump_kernel is_kdump_kernel 168 #if defined(CONFIG_PPC_RTAS) 169 void crash_free_reserved_phys_range(unsigned long begin, unsigned long end); 170 #define crash_free_reserved_phys_range crash_free_reserved_phys_range 171 #endif /* CONFIG_PPC_RTAS */ 172 173 #else /* !CONFIG_CRASH_DUMP */ 174 static inline void crash_kexec_secondary(struct pt_regs *regs) { } 175 176 static inline int crash_shutdown_register(crash_shutdown_t handler) 177 { 178 return 0; 179 } 180 181 static inline int crash_shutdown_unregister(crash_shutdown_t handler) 182 { 183 return 0; 184 } 185 186 static inline bool kdump_in_progress(void) 187 { 188 return false; 189 } 190 191 static inline void crash_ipi_callback(struct pt_regs *regs) { } 192 193 static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)) 194 { 195 } 196 197 #endif /* CONFIG_CRASH_DUMP */ 198 199 #if defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP) 200 int update_cpus_node(void *fdt); 201 #endif 202 203 #ifdef CONFIG_PPC_BOOK3S_64 204 #include <asm/book3s/64/kexec.h> 205 #endif 206 207 #ifndef reset_sprs 208 #define reset_sprs reset_sprs 209 static inline void reset_sprs(void) 210 { 211 } 212 #endif 213 214 #endif /* ! __ASSEMBLY__ */ 215 #endif /* __KERNEL__ */ 216 #endif /* _ASM_POWERPC_KEXEC_H */ 217