include/asm-sparc/head.h

/* */
   1 #ifndef __SPARC_HEAD_H
   2 #define __SPARC_HEAD_H
   3 
   4 #define KERNSIZE        134217728   /* this is how much of a mapping the prom promises */
   5 #define PAGESIZE        4096        /* luckily this is the same on sun4c's and sun4m's */
   6 #define PAGESHIFT       12
   7 #define PROM_BASE       -1568768    /* casa 'de PROM */
   8 #define LOAD_ADDR       0x4000      /* prom jumps to us here */
   9 #define C_STACK         96
  10 #define SUN4C_SEGSZ     (1 << 18)
  11 #define USRSTACK        0x0         /* no joke, this is temporary, trust me */
  12 #define INT_ENABLE_REG_PHYSADR      0xf5000000
  13 #define INTS_ENAB   0x01
  14 
  15 #define BOOT_MSG_LEN    61
  16 #define BOOT_MSG2_LEN   50
  17 
  18 
  19 #define WRITE_PAUSE     nop; nop; nop;
  20 
  21 #define PAGE_SIZE       4096
  22 
  23 /* Here are some trap goodies */
  24 
  25 
  26 /* Generic trap entry. */
  27 
  28 #define TRAP_ENTRY(type, label) \
  29         mov (type), %l3; b label; rd %psr, %l0; nop;
  30 
  31 /* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and
  32  * gets handled with another macro.
  33  */
  34 
  35 #define TRAP_ENTRY_INTERRUPT(int_level) \
  36         mov int_level, %l3; b stray_irq_entry; rd %psr, %l0; nop;
  37 
  38 /* Here is the macro for soft interrupts (ie. not as urgent as hard ones)
  39  * which need to jump to a different handler.
  40  */
  41 
  42 #define TRAP_ENTRY_INTERRUPT_SOFT(int_level, ident) \
  43         mov int_level, %l3; rd %psr, %l0; b stray_irq_entry; mov ident, %l4;
  44 
  45 /* The above two macros are for generic traps. The following is made
  46  * especially for timer interrupts at IRQ level 14.
  47  */
  48 
  49 #define TRAP_ENTRY_TIMER \
  50         mov 10, %l3; rd %psr, %l0; b sparc_timer; nop;
  51 
  52 /* Non-maskable interrupt entry macro. You have to turn off all interrupts
  53  * to not receive this. This is usually due to a asynchronous memory error.
  54  * All we can really do is stop the show. :-(
  55  */
  56 
  57 #define TRAP_ENTRY_INTERRUPT_NMI(t_type, jmp_to) \
  58         mov t_type, %l3; b jmp_to; rd %psr, %l0; nop;
  59 
  60 /* Trap entry code in entry.S needs the offsets into task_struct
  61  * to get at the thread_struct goodies during window craziness.
  62  *
  63  * NOTE: We need to keep these values under 0x3ff in order to do
  64  *       efficient load/stores in the window fill/spill handlers.
  65  *       See TRAP_WIN_CLEAN in entry.S for details.
  66  */
  67 
  68 #define THREAD_UWINDOWS 0x3bc
  69 #define THREAD_WIM 0x3c0
  70 #define THREAD_W_SAVED 0x3c4
  71 #define THREAD_KSP 0x3c8
  72 #define THREAD_USP 0x3cc
  73 #define THREAD_REG_WINDOW 0x3d4
  74 
  75 #endif __SPARC_HEAD_H
/* */
root/include/asm-sparc/head.h

INCLUDED FROM
