release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/include/asm/kexec.h

   1 #ifndef _ARM_KEXEC_H
   2 #define _ARM_KEXEC_H
   3
   4 #ifdef CONFIG_KEXEC
   5
   6 /* Maximum physical address we can use pages from */
   7 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
   8 /* Maximum address we can reach in physical address mode */
   9 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
  10 /* Maximum address we can use for the control code buffer */
  11 #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
  12
  13 #define KEXEC_CONTROL_PAGE_SIZE 4096
  14
  15 #define KEXEC_ARCH KEXEC_ARCH_ARM
  16
  17 #define KEXEC_ARM_ATAGS_OFFSET  0x1000
  18 #define KEXEC_ARM_ZIMAGE_OFFSET 0x8000
  19
  20 #ifndef __ASSEMBLY__
  21
  22 /**
  23  * crash_setup_regs() - save registers for the panic kernel
  24  * @newregs: registers are saved here
  25  * @oldregs: registers to be saved (may be %NULL)
  26  *
  27  * Function copies machine registers from @oldregs to @newregs. If @oldregs is
  28  * %NULL then current registers are stored there.
  29  */
  30 static inline void crash_setup_regs(struct pt_regs *newregs,
  31                                     struct pt_regs *oldregs)
  32 {
  33         if (oldregs) {
  34                 memcpy(newregs, oldregs, sizeof(*newregs));
  35         } else {
  36                 __asm__ __volatile__ ("stmia %0, {r0 - r15}"
  37                                       : : "r" (&newregs->ARM_r0));
  38                 __asm__ __volatile__ ("mrs %0, cpsr"
  39                                       : "=r" (newregs->ARM_cpsr));
  40         }
  41 }
  42
  43 #endif /* __ASSEMBLY__ */
  44
  45 #endif /* CONFIG_KEXEC */
  46
  47 #endif /* _ARM_KEXEC_H */