include/asm-sparc/head.h

/* */
   1 /* $Id: head.h,v 1.23 1996/02/15 09:12:55 davem Exp $ */
   2 #ifndef __SPARC_HEAD_H
   3 #define __SPARC_HEAD_H
   4 
   5 #define KERNBASE        0xf0000000  /* First address the kernel will eventually be */
   6 #define LOAD_ADDR       0x4000      /* prom jumps to us here unless this is elf /boot */
   7 #define SUN4C_SEGSZ     (1 << 18)
   8 #define SRMMU_L1_KBASE_OFFSET ((KERNBASE>>24)<<2)  /* Used in boot remapping. */
   9 #define INTS_ENAB        0x01           /* entry.S uses this. */
  10 
  11 #define NCPUS            4              /* Architectual limit of sun4m. */
  12 
  13 #define SUN4_PROM_VECTOR 0xFFE81000     /* To safely die on a SUN4 */
  14 #define SUN4_PRINTF      0x84           /* Offset into SUN4_PROM_VECTOR */
  15 
  16 #define WRITE_PAUSE      nop; nop; nop; /* Have to do this after %wim/%psr chg */
  17 #define NOP_INSN         0x01000000     /* Used to patch sparc_save_state */
  18 
  19 /* Here are some trap goodies */
  20 
  21 /* Generic trap entry. */
  22 #define TRAP_ENTRY(type, label) \
  23         rd %psr, %l0; b label; rd %wim, %l3; nop;
  24 
  25 /* Data/text faults. Defaults to sun4c version at boot time. */
  26 #define SPARC_TFAULT rd %psr, %l0; rd %wim, %l3; b sun4c_fault; mov 1, %l7;
  27 #define SPARC_DFAULT rd %psr, %l0; rd %wim, %l3; b sun4c_fault; mov 0, %l7;
  28 
  29 /* This is for traps we should NEVER get. */
  30 #define BAD_TRAP(num) \
  31         rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3;
  32 
  33 /* Notice that for the system calls we pull a trick.  We load up a
  34  * different pointer to the system call vector table in %l7, but call
  35  * the same generic system call low-level entry point.  The trap table
  36  * entry sequences are also HyperSparc pipeline friendly ;-)
  37  */
  38 
  39 /* Software trap for Linux system calls. */
  40 #define LINUX_SYSCALL_TRAP \
  41         sethi %hi(C_LABEL(sys_call_table)), %l7; \
  42         or %l7, %lo(C_LABEL(sys_call_table)), %l7; \
  43         b linux_sparc_syscall; \
  44         rd %psr, %l0;
  45 
  46 /* Software trap for SunOS4.1.x system calls. */
  47 #define SUNOS_SYSCALL_TRAP \
  48         rd %psr, %l0; \
  49         sethi %hi(C_LABEL(sunos_sys_table)), %l7; \
  50         b linux_sparc_syscall; \
  51         or %l7, %lo(C_LABEL(sunos_sys_table)), %l7;
  52 
  53 /* Software trap for Slowaris system calls. */
  54 #define SOLARIS_SYSCALL_TRAP \
  55         sethi %hi(C_LABEL(sys_call_table)), %l7; \
  56         or %l7, %lo(C_LABEL(sys_call_table)), %l7; \
  57         b linux_sparc_syscall; \
  58         rd %psr, %l0;
  59 
  60 /* Software trap for Sparc-netbsd system calls. */
  61 #define NETBSD_SYSCALL_TRAP \
  62         sethi %hi(C_LABEL(sys_call_table)), %l7; \
  63         or %l7, %lo(C_LABEL(sys_call_table)), %l7; \
  64         b linux_sparc_syscall; \
  65         rd %psr, %l0;
  66 
  67 /* The Get Condition Codes software trap for userland. */
  68 #define GETCC_TRAP \
  69         b getcc_trap_handler; mov %psr, %l0; nop; nop
  70 
  71 /* The Set Condition Codes software trap for userland. */
  72 #define SETCC_TRAP \
  73         b setcc_trap_handler; mov %psr, %l0; nop; nop
  74 
  75 /* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and
  76  * gets handled with another macro.
  77  */
  78 #define TRAP_ENTRY_INTERRUPT(int_level) \
  79         mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3;
  80 
  81 /* NMI's (Non Maskable Interrupts) are special, you can't keep them
  82  * from coming in, and basically if you get one, the shows over. ;(
  83  * On the sun4c they are usually asyncronous memory errors, on the
  84  * the sun4m they could be either due to mem errors or a software
  85  * initiated interrupt from the prom/kern on an SMP box saying "I
  86  * command you to do CPU tricks, read your mailbox for more info."
  87  */
  88 #define NMI_TRAP \
  89         rd %wim, %l3; b linux_trap_nmi_sun4c; mov %psr, %l0; nop;
  90 
  91 /* Window overflows/underflows are special and we need to try and be as
  92  * efficient as possible here....
  93  */
  94 #define WINDOW_SPILL \
  95         rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0;
  96 
  97 #define WINDOW_FILL \
  98         rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0;
  99 
 100 #endif __SPARC_HEAD_H
/* */
root/include/asm-sparc/head.h

INCLUDED FROM
