root/include/asm-alpha/processor.h

/* */

INCLUDED FROM

DEFINITIONS

1. thread_saved_pc
2. start_thread

   1 /*
   2  * include/asm-alpha/processor.h
   3  *
   4  * Copyright (C) 1994 Linus Torvalds
   5  */
   6 
   7 #ifndef __ASM_ALPHA_PROCESSOR_H
   8 #define __ASM_ALPHA_PROCESSOR_H
   9 
  10 /*
  11  * We have a 41-bit user address space: 2TB user VM...
  12  */
  13 #define TASK_SIZE (0x40000000000UL)
  14 
  15 /*
  16  * Bus types
  17  */
  18 #define EISA_bus 1
  19 #define EISA_bus__is_a_macro /* for versions in ksyms.c */
  20 #define MCA_bus 0
  21 #define MCA_bus__is_a_macro /* for versions in ksyms.c */
  22 
  23 /*
  24  * The alpha has no problems with write protection
  25  */
  26 #define wp_works_ok 1
  27 #define wp_works_ok__is_a_macro /* for versions in ksyms.c */
  28 
  29 struct thread_struct {
  30         unsigned long ksp;
  31         unsigned long usp;
  32         unsigned long ptbr;
  33         unsigned int pcc;
  34         unsigned int asn;
  35         unsigned long unique;
  36         unsigned long flags;
  37         unsigned long res1, res2;
  38 };
  39 
  40 #define INIT_MMAP { &init_mm, 0xfffffc0000000000,  0xfffffc0010000000, \
  41         PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC }
  42 
  43 #define INIT_TSS  { \
  44         0, 0, 0, \
  45         0, 0, 0, \
  46         0, 0, 0, \
  47 }
  48 
  49 #include <asm/ptrace.h>
  50 
  51 /*
  52  * Return saved PC of a blocked thread.  This assumes the frame pointer
  53  * is the 6th saved long on the kernel stack and that the saved return
  54  * address is the first long in the frame.  This all holds provided the
  55  * thread blocked through a call to schedule().
  56  */
  57 extern inline unsigned long thread_saved_pc(struct thread_struct *t)
     /*  */
  58 {
  59         unsigned long fp;
  60 
  61         fp = ((unsigned long*)t->ksp)[6];
  62         return *(unsigned long*)fp;
  63 }
  64 
  65 /*
  66  * Do necessary setup to start up a newly executed thread.
  67  */
  68 static inline void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
     /*  */
  69 {
  70         regs->pc = pc;
  71         regs->ps = 8;
  72         wrusp(sp);
  73 }
  74 
  75 #endif /* __ASM_ALPHA_PROCESSOR_H */

/* */