lunaix-os/arch/aarch64/includes/asm/hart.h

   1 #ifndef __LUNAIX_ARCH_HART_H
   2 #define __LUNAIX_ARCH_HART_H
   3
   4 #ifndef __ASM__
   5 #include <lunaix/types.h>
   6 #include <lunaix/bits.h>
   7 #include <asm/aa64_spsr.h>
   8
   9 #define SYNDROME_ETYPE  BITFIELD(63, 56)
  10
  11 struct hart_state;
  12
  13 struct regcontext
  14 {
  15     union {
  16         reg_t x[31];
  17         struct {
  18             reg_t x_[29];
  19             reg_t fp;
  20             reg_t lr;
  21         };
  22     };
  23 } compact align(8);
  24
  25 struct exec_param
  26 {
  27     struct hart_state* parent_state;
  28     reg_t spsr;
  29     reg_t link;
  30     struct {
  31         reg_t sp_el0;
  32         reg_t rsvd;
  33     };
  34
  35     reg_t syndrome;
  36 } compact align(8);
  37
  38 struct hart_state
  39 {
  40     reg_t depth;
  41     struct regcontext registers;
  42     struct exec_param execp;
  43 } compact align(16);
  44
  45 static inline int
  46 hart_vector_stamp(struct hart_state* hstate)
  47 {
  48     return BITS_GET(hstate->execp.syndrome, SYNDROME_ETYPE);
  49 }
  50
  51 static inline unsigned int
  52 hart_ecause(struct hart_state* hstate)
  53 {
  54     return hstate->execp.syndrome;
  55 }
  56
  57 static inline struct hart_state*
  58 hart_parent_state(struct hart_state* hstate)
  59 {
  60     return hstate->execp.parent_state;
  61 }
  62
  63 static inline void
  64 hart_push_state(struct hart_state* p_hstate, struct hart_state* hstate)
  65 {
  66     hstate->execp.parent_state = p_hstate;
  67 }
  68
  69 static inline ptr_t
  70 hart_pc(struct hart_state* hstate)
  71 {
  72     return hstate->execp.link;
  73 }
  74
  75 static inline ptr_t
  76 hart_sp(struct hart_state* hstate)
  77 {
  78     return __ptr(&hstate[-1]);
  79 }
  80
  81 static inline bool
  82 kernel_context(struct hart_state* hstate)
  83 {
  84     reg_t spsr;
  85
  86     spsr = hstate->execp.spsr;
  87     return !spsr_from_el0(spsr);
  88 }
  89
  90 static inline ptr_t
  91 hart_stack_frame(struct hart_state* hstate)
  92 {
  93     return hstate->registers.fp;
  94 }
  95
  96 #endif
  97
  98 #endif /* __LUNAIX_ARCH_HART_H */