arch/loongarch/include/asm/kexec.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * kexec.h for kexec
   4  *
   5  * Copyright (C) 2022 Loongson Technology Corporation Limited
   6  */
   7
   8 #ifndef _ASM_KEXEC_H
   9 #define _ASM_KEXEC_H
  10
  11 #include <asm/stacktrace.h>
  12 #include <asm/page.h>
  13
  14 /* Maximum physical address we can use pages from */
  15 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
  16 /* Maximum address we can reach in physical address mode */
  17 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
  18  /* Maximum address we can use for the control code buffer */
  19 #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
  20
  21 /* Reserve a page for the control code buffer */
  22 #define KEXEC_CONTROL_PAGE_SIZE PAGE_SIZE
  23
  24 /* The native architecture */
  25 #define KEXEC_ARCH KEXEC_ARCH_LOONGARCH
  26
  27 static inline void crash_setup_regs(struct pt_regs *newregs,
  28                                     struct pt_regs *oldregs)
  29 {
  30         if (oldregs)
  31                 memcpy(newregs, oldregs, sizeof(*newregs));
  32         else
  33                 prepare_frametrace(newregs);
  34 }
  35
  36 #define ARCH_HAS_KIMAGE_ARCH
  37
  38 struct kimage_arch {
  39         unsigned long efi_boot;
  40         unsigned long cmdline_ptr;
  41         unsigned long systable_ptr;
  42 };
  43
  44 typedef void (*do_kexec_t)(unsigned long efi_boot,
  45                            unsigned long cmdline_ptr,
  46                            unsigned long systable_ptr,
  47                            unsigned long start_addr,
  48                            unsigned long first_ind_entry);
  49
  50 struct kimage;
  51 extern const unsigned char relocate_new_kernel[];
  52 extern const size_t relocate_new_kernel_size;
  53 extern void kexec_reboot(void);
  54
  55 #ifdef CONFIG_SMP
  56 extern atomic_t kexec_ready_to_reboot;
  57 extern const unsigned char kexec_smp_wait[];
  58 #endif
  59
  60 #endif /* !_ASM_KEXEC_H */