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 55 typedef 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 */ 63 static 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 72 extern void kexec_smp_wait(void); /* get and clear naca physid, wait for 73 master to copy new code to 0 */ 74 extern int crashing_cpu; 75 extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); 76 extern void crash_ipi_callback(struct pt_regs *); 77 extern int crash_wake_offline; 78 79 struct kimage; 80 struct pt_regs; 81 extern void default_machine_kexec(struct kimage *image); 82 extern void default_machine_crash_shutdown(struct pt_regs *regs); 83 extern int crash_shutdown_register(crash_shutdown_t handler); 84 extern int crash_shutdown_unregister(crash_shutdown_t handler); 85 86 extern void crash_kexec_secondary(struct pt_regs *regs); 87 int __init overlaps_crashkernel(unsigned long start, unsigned long size); 88 extern void reserve_crashkernel(void); 89 extern void machine_kexec_mask_interrupts(void); 90 91 static inline bool kdump_in_progress(void) 92 { 93 return crashing_cpu >= 0; 94 } 95 96 void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer, 97 unsigned long start_address) __noreturn; 98 99 void kexec_copy_flush(struct kimage *image); 100 101 #ifdef CONFIG_KEXEC_FILE 102 extern const struct kexec_file_ops kexec_elf64_ops; 103 104 #define ARCH_HAS_KIMAGE_ARCH 105 106 struct kimage_arch { 107 struct crash_mem *exclude_ranges; 108 109 unsigned long backup_start; 110 void *backup_buf; 111 void *fdt; 112 }; 113 114 char *setup_kdump_cmdline(struct kimage *image, char *cmdline, 115 unsigned long cmdline_len); 116 int 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 121 struct kexec_buf; 122 123 int load_crashdump_segments_ppc64(struct kimage *image, 124 struct kexec_buf *kbuf); 125 int 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); 128 unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image); 129 int 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 */ 137 static inline void crash_kexec_secondary(struct pt_regs *regs) { } 138 139 static inline int overlaps_crashkernel(unsigned long start, unsigned long size) 140 { 141 return 0; 142 } 143 144 static inline void reserve_crashkernel(void) { ; } 145 146 static inline int crash_shutdown_register(crash_shutdown_t handler) 147 { 148 return 0; 149 } 150 151 static inline int crash_shutdown_unregister(crash_shutdown_t handler) 152 { 153 return 0; 154 } 155 156 static inline bool kdump_in_progress(void) 157 { 158 return false; 159 } 160 161 static inline void crash_ipi_callback(struct pt_regs *regs) { } 162 163 static 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 175 static inline void reset_sprs(void) 176 { 177 } 178 #endif 179 180 #endif /* ! __ASSEMBLY__ */ 181 #endif /* __KERNEL__ */ 182 #endif /* _ASM_POWERPC_KEXEC_H */ 183