arch/blackfin/include/asm/entry.h

   1 #ifndef __BFIN_ENTRY_H
   2 #define __BFIN_ENTRY_H
   3
   4 #include <asm/setup.h>
   5 #include <asm/page.h>
   6
   7 #ifdef __ASSEMBLY__
   8
   9 #define LFLUSH_I_AND_D  0x00000808
  10 #define LSIGTRAP        5
  11
  12 /* process bits for task_struct.flags */
  13 #define PF_TRACESYS_OFF 3
  14 #define PF_TRACESYS_BIT 5
  15 #define PF_PTRACED_OFF  3
  16 #define PF_PTRACED_BIT  4
  17 #define PF_DTRACE_OFF   1
  18 #define PF_DTRACE_BIT   5
  19
  20 /*
  21  * NOTE!  The single-stepping code assumes that all interrupt handlers
  22  * start by saving SYSCFG on the stack with their first instruction.
  23  */
  24
  25 /* This one is used for exceptions, emulation, and NMI.  It doesn't push
  26    RETI and doesn't do cli.  */
  27 #define SAVE_ALL_SYS            save_context_no_interrupts
  28 /* This is used for all normal interrupts.  It saves a minimum of registers
  29    to the stack, loads the IRQ number, and jumps to common code.  */
  30 #ifdef CONFIG_IPIPE
  31 # define LOAD_IPIPE_IPEND \
  32         P0.l = lo(IPEND); \
  33         P0.h = hi(IPEND); \
  34         R1 = [P0];
  35 #else
  36 # define LOAD_IPIPE_IPEND
  37 #endif
  38 #define INTERRUPT_ENTRY(N)                                              \
  39     [--sp] = SYSCFG;                                                    \
  40                                                                         \
  41     [--sp] = P0;        /*orig_p0*/                                     \
  42     [--sp] = R0;        /*orig_r0*/                                     \
  43     [--sp] = (R7:0,P5:0);                                               \
  44     R0 = (N);                                                           \
  45     LOAD_IPIPE_IPEND                                                    \
  46     jump __common_int_entry;
  47
  48 /* For timer interrupts, we need to save IPEND, since the user_mode
  49            macro accesses it to determine where to account time.  */
  50 #define TIMER_INTERRUPT_ENTRY(N)                                        \
  51     [--sp] = SYSCFG;                                                    \
  52                                                                         \
  53     [--sp] = P0;        /*orig_p0*/                                     \
  54     [--sp] = R0;        /*orig_r0*/                                     \
  55     [--sp] = (R7:0,P5:0);                                               \
  56     p0.l = lo(IPEND);                                                   \
  57     p0.h = hi(IPEND);                                                   \
  58     r1 = [p0];                                                          \
  59     R0 = (N);                                                           \
  60     jump __common_int_entry;
  61
  62 /* This one pushes RETI without using CLI.  Interrupts are enabled.  */
  63 #define SAVE_CONTEXT_SYSCALL    save_context_syscall
  64 #define SAVE_CONTEXT            save_context_with_interrupts
  65 #define SAVE_CONTEXT_CPLB       save_context_cplb
  66
  67 #define RESTORE_ALL_SYS         restore_context_no_interrupts
  68 #define RESTORE_CONTEXT         restore_context_with_interrupts
  69 #define RESTORE_CONTEXT_CPLB    restore_context_cplb
  70
  71 #endif                          /* __ASSEMBLY__ */
  72 #endif                          /* __BFIN_ENTRY_H */