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  BITS(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 sp_el1;
  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     return BITS_GET(hstate->execp.syndrome, SYNDROME_ETYPE);
  48 }
  49
  50 static inline unsigned int
  51 hart_ecause(struct hart_state* hstate) {
  52     return hstate->execp.syndrome;
  53 }
  54
  55 static inline struct hart_state*
  56 hart_parent_state(struct hart_state* hstate)
  57 {
  58     return hstate->execp.parent_state;
  59 }
  60
  61 static inline void
  62 hart_push_state(struct hart_state* p_hstate, struct hart_state* hstate)
  63 {
  64     hstate->execp.parent_state = p_hstate;
  65 }
  66
  67 static inline ptr_t
  68 hart_pc(struct hart_state* hstate)
  69 {
  70     return hstate->execp.link;
  71 }
  72
  73 static inline ptr_t
  74 hart_sp(struct hart_state* hstate)
  75 {
  76     if (spsr_from_el0(hstate->execp.spsr)) {
  77         return hstate->execp.sp_el0;
  78     }
  79     return hstate->execp.sp_el1;
  80 }
  81
  82 static inline bool
  83 kernel_context(struct hart_state* hstate)
  84 {
  85     // TODO
  86     return false;
  87 }
  88
  89 static inline ptr_t
  90 hart_stack_frame(struct hart_state* hstate)
  91 {
  92     return hstate->registers.fp;
  93 }
  94
  95 #endif
  96
  97 #endif /* __LUNAIX_ARCH_HART_H */