arch/sparc64/context.h

   1 #ifndef SPARC64_CONTEXT_H
   2 #define SPARC64_CONTEXT_H
   3
   4 #define STACK_BIAS             2047
   5
   6 struct context {
   7     /* General registers */
   8     uint64_t regs[32];
   9     uint64_t pc;
  10     uint64_t npc;
  11 #define REG_O0 8
  12 #define REG_SP 14
  13 #define SP_LOC(ctx) (&(ctx)->regs[REG_SP])
  14     /* Flags */
  15     /* Optional stack contents */
  16     uint64_t return_addr;
  17     uint64_t param[0];
  18 };
  19
  20 /* Create a new context in the given stack */
  21 struct context *
  22 init_context(uint8_t *stack, uint64_t stack_size, int num_param);
  23
  24 /* Switch context */
  25 struct context *switch_to(struct context *);
  26
  27 /* Holds physical address of boot context */
  28 extern unsigned long __boot_ctx;
  29
  30 /* This can always be safely used to refer to the boot context */
  31 #define boot_ctx ((struct context *) phys_to_virt(__boot_ctx))
  32
  33 #endif /* SPARC64_CONTEXT_H */