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/* $Id: traps.h,v 1.9 1998/03/09 14:04:53 jj Exp $
* traps.h: Format of entries for the Sparc trap table.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC_TRAPS_H
#define _SPARC_TRAPS_H
#define NUM_SPARC_TRAPS 255
#ifndef __ASSEMBLY__
/* This is for V8 compliant Sparc CPUS */
struct tt_entry {
unsigned long inst_one;
unsigned long inst_two;
unsigned long inst_three;
unsigned long inst_four;
};
/* We set this to _start in system setup. */
extern struct tt_entry *sparc_ttable;
static inline unsigned long get_tbr(void)
{
unsigned long tbr;
__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (tbr));
return tbr;
}
#endif /* !(__ASSEMBLY__) */
/* For patching the trap table at boot time, we need to know how to
* form various common Sparc instructions. Thus these macros...
*/
#define SPARC_MOV_CONST_L3(const) (0xa6102000 | (const&0xfff))
/* The following assumes that the branch lies before the place we
* are branching to. This is the case for a trap vector...
* You have been warned.
*/
#define SPARC_BRANCH(dest_addr, inst_addr) \
(0x10800000 | (((dest_addr-inst_addr)>>2)&0x3fffff))
#define SPARC_RD_PSR_L0 (0xa1480000)
#define SPARC_RD_WIM_L3 (0xa7500000)
#define SPARC_NOP (0x01000000)
/* Various interesting trap levels. */
/* First, hardware traps. */
#define SP_TRAP_TFLT 0x1 /* Text fault */
#define SP_TRAP_II 0x2 /* Illegal Instruction */
#define SP_TRAP_PI 0x3 /* Privileged Instruction */
#define SP_TRAP_FPD 0x4 /* Floating Point Disabled */
#define SP_TRAP_WOVF 0x5 /* Window Overflow */
#define SP_TRAP_WUNF 0x6 /* Window Underflow */
#define SP_TRAP_MNA 0x7 /* Memory Address Unaligned */
#define SP_TRAP_FPE 0x8 /* Floating Point Exception */
#define SP_TRAP_DFLT 0x9 /* Data Fault */
#define SP_TRAP_TOF 0xa /* Tag Overflow */
#define SP_TRAP_WDOG 0xb /* Watchpoint Detected */
#define SP_TRAP_IRQ1 0x11 /* IRQ level 1 */
#define SP_TRAP_IRQ2 0x12 /* IRQ level 2 */
#define SP_TRAP_IRQ3 0x13 /* IRQ level 3 */
#define SP_TRAP_IRQ4 0x14 /* IRQ level 4 */
#define SP_TRAP_IRQ5 0x15 /* IRQ level 5 */
#define SP_TRAP_IRQ6 0x16 /* IRQ level 6 */
#define SP_TRAP_IRQ7 0x17 /* IRQ level 7 */
#define SP_TRAP_IRQ8 0x18 /* IRQ level 8 */
#define SP_TRAP_IRQ9 0x19 /* IRQ level 9 */
#define SP_TRAP_IRQ10 0x1a /* IRQ level 10 */
#define SP_TRAP_IRQ11 0x1b /* IRQ level 11 */
#define SP_TRAP_IRQ12 0x1c /* IRQ level 12 */
#define SP_TRAP_IRQ13 0x1d /* IRQ level 13 */
#define SP_TRAP_IRQ14 0x1e /* IRQ level 14 */
#define SP_TRAP_IRQ15 0x1f /* IRQ level 15 Non-maskable */
#define SP_TRAP_RACC 0x20 /* Register Access Error ??? */
#define SP_TRAP_IACC 0x21 /* Instruction Access Error */
#define SP_TRAP_CPDIS 0x24 /* Co-Processor Disabled */
#define SP_TRAP_BADFL 0x25 /* Unimplemented Flush Instruction */
#define SP_TRAP_CPEXP 0x28 /* Co-Processor Exception */
#define SP_TRAP_DACC 0x29 /* Data Access Error */
#define SP_TRAP_DIVZ 0x2a /* Divide By Zero */
#define SP_TRAP_DSTORE 0x2b /* Data Store Error ??? */
#define SP_TRAP_DMM 0x2c /* Data Access MMU Miss ??? */
#define SP_TRAP_IMM 0x3c /* Instruction Access MMU Miss ??? */
/* Now the Software Traps... */
#define SP_TRAP_SUNOS 0x80 /* SunOS System Call */
#define SP_TRAP_SBPT 0x81 /* Software Breakpoint */
#define SP_TRAP_SDIVZ 0x82 /* Software Divide-by-Zero trap */
#define SP_TRAP_FWIN 0x83 /* Flush Windows */
#define SP_TRAP_CWIN 0x84 /* Clean Windows */
#define SP_TRAP_RCHK 0x85 /* Range Check */
#define SP_TRAP_FUNA 0x86 /* Fix Unaligned Access */
#define SP_TRAP_IOWFL 0x87 /* Integer Overflow */
#define SP_TRAP_SOLARIS 0x88 /* Solaris System Call */
#define SP_TRAP_NETBSD 0x89 /* NetBSD System Call */
#define SP_TRAP_LINUX 0x90 /* Linux System Call */
/* Names used for compatibility with SunOS */
#define ST_SYSCALL 0x00
#define ST_BREAKPOINT 0x01
#define ST_DIV0 0x02
#define ST_FLUSH_WINDOWS 0x03
#define ST_CLEAN_WINDOWS 0x04
#define ST_RANGE_CHECK 0x05
#define ST_FIX_ALIGN 0x06
#define ST_INT_OVERFLOW 0x07
/* Special traps... */
#define SP_TRAP_KBPT1 0xfe /* KADB/PROM Breakpoint one */
#define SP_TRAP_KBPT2 0xff /* KADB/PROM Breakpoint two */
/* Handy Macros */
/* Is this a trap we never expect to get? */
#define BAD_TRAP_P(level) \
((level > SP_TRAP_WDOG && level < SP_TRAP_IRQ1) || \
(level > SP_TRAP_IACC && level < SP_TRAP_CPDIS) || \
(level > SP_TRAP_BADFL && level < SP_TRAP_CPEXP) || \
(level > SP_TRAP_DMM && level < SP_TRAP_IMM) || \
(level > SP_TRAP_IMM && level < SP_TRAP_SUNOS) || \
(level > SP_TRAP_LINUX && level < SP_TRAP_KBPT1))
/* Is this a Hardware trap? */
#define HW_TRAP_P(level) ((level > 0) && (level < SP_TRAP_SUNOS))
/* Is this a Software trap? */
#define SW_TRAP_P(level) ((level >= SP_TRAP_SUNOS) && (level <= SP_TRAP_KBPT2))
/* Is this a system call for some OS we know about? */
#define SCALL_TRAP_P(level) ((level == SP_TRAP_SUNOS) || \
(level == SP_TRAP_SOLARIS) || \
(level == SP_TRAP_NETBSD) || \
(level == SP_TRAP_LINUX))
#endif /* !(_SPARC_TRAPS_H) */
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