arch/sh/include/asm/kexec.h

   1 #ifndef __ASM_SH_KEXEC_H
   2 #define __ASM_SH_KEXEC_H
   3
   4 #include <asm/ptrace.h>
   5 #include <asm/string.h>
   6
   7 /*
   8  * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
   9  * I.e. Maximum page that is mapped directly into kernel memory,
  10  * and kmap is not required.
  11  *
  12  * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct
  13  * calculation for the amount of memory directly mappable into the
  14  * kernel memory space.
  15  */
  16
  17 /* Maximum physical address we can use pages from */
  18 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
  19 /* Maximum address we can reach in physical address mode */
  20 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
  21 /* Maximum address we can use for the control code buffer */
  22 #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
  23
  24 #define KEXEC_CONTROL_PAGE_SIZE 4096
  25
  26 /* The native architecture */
  27 #define KEXEC_ARCH KEXEC_ARCH_SH
  28
  29 #ifdef CONFIG_KEXEC
  30 /* arch/sh/kernel/machine_kexec.c */
  31 void reserve_crashkernel(void);
  32
  33 static inline void crash_setup_regs(struct pt_regs *newregs,
  34                                     struct pt_regs *oldregs)
  35 {
  36         if (oldregs)
  37                 memcpy(newregs, oldregs, sizeof(*newregs));
  38         else {
  39                 __asm__ __volatile__ ("mov r0, %0" : "=r" (newregs->regs[0]));
  40                 __asm__ __volatile__ ("mov r1, %0" : "=r" (newregs->regs[1]));
  41                 __asm__ __volatile__ ("mov r2, %0" : "=r" (newregs->regs[2]));
  42                 __asm__ __volatile__ ("mov r3, %0" : "=r" (newregs->regs[3]));
  43                 __asm__ __volatile__ ("mov r4, %0" : "=r" (newregs->regs[4]));
  44                 __asm__ __volatile__ ("mov r5, %0" : "=r" (newregs->regs[5]));
  45                 __asm__ __volatile__ ("mov r6, %0" : "=r" (newregs->regs[6]));
  46                 __asm__ __volatile__ ("mov r7, %0" : "=r" (newregs->regs[7]));
  47                 __asm__ __volatile__ ("mov r8, %0" : "=r" (newregs->regs[8]));
  48                 __asm__ __volatile__ ("mov r9, %0" : "=r" (newregs->regs[9]));
  49                 __asm__ __volatile__ ("mov r10, %0" : "=r" (newregs->regs[10]));
  50                 __asm__ __volatile__ ("mov r11, %0" : "=r" (newregs->regs[11]));
  51                 __asm__ __volatile__ ("mov r12, %0" : "=r" (newregs->regs[12]));
  52                 __asm__ __volatile__ ("mov r13, %0" : "=r" (newregs->regs[13]));
  53                 __asm__ __volatile__ ("mov r14, %0" : "=r" (newregs->regs[14]));
  54                 __asm__ __volatile__ ("mov r15, %0" : "=r" (newregs->regs[15]));
  55
  56                 __asm__ __volatile__ ("sts pr, %0" : "=r" (newregs->pr));
  57                 __asm__ __volatile__ ("sts macl, %0" : "=r" (newregs->macl));
  58                 __asm__ __volatile__ ("sts mach, %0" : "=r" (newregs->mach));
  59
  60                 __asm__ __volatile__ ("stc gbr, %0" : "=r" (newregs->gbr));
  61                 __asm__ __volatile__ ("stc sr, %0" : "=r" (newregs->sr));
  62
  63                 newregs->pc = (unsigned long)current_text_addr();
  64         }
  65 }
  66 #else
  67 static inline void reserve_crashkernel(void) { }
  68 #endif /* CONFIG_KEXEC */
  69
  70 #endif /* __ASM_SH_KEXEC_H */