111 lines
3.7 KiB
C
111 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
|
|
* The President and Fellows of Harvard College.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _MIPS_TRAPFRAME_H_
|
|
#define _MIPS_TRAPFRAME_H_
|
|
|
|
/*
|
|
* Structure describing what is saved on the stack during entry to
|
|
* the exception handler.
|
|
*
|
|
* This must agree with the code in exception-*.S.
|
|
*/
|
|
|
|
struct trapframe {
|
|
uint32_t tf_vaddr; /* coprocessor 0 vaddr register */
|
|
uint32_t tf_status; /* coprocessor 0 status register */
|
|
uint32_t tf_cause; /* coprocessor 0 cause register */
|
|
uint32_t tf_lo;
|
|
uint32_t tf_hi;
|
|
uint32_t tf_ra; /* Saved register 31 */
|
|
uint32_t tf_at; /* Saved register 1 (AT) */
|
|
uint32_t tf_v0; /* Saved register 2 (v0) */
|
|
uint32_t tf_v1; /* etc. */
|
|
uint32_t tf_a0;
|
|
uint32_t tf_a1;
|
|
uint32_t tf_a2;
|
|
uint32_t tf_a3;
|
|
uint32_t tf_t0;
|
|
uint32_t tf_t1;
|
|
uint32_t tf_t2;
|
|
uint32_t tf_t3;
|
|
uint32_t tf_t4;
|
|
uint32_t tf_t5;
|
|
uint32_t tf_t6;
|
|
uint32_t tf_t7;
|
|
uint32_t tf_s0;
|
|
uint32_t tf_s1;
|
|
uint32_t tf_s2;
|
|
uint32_t tf_s3;
|
|
uint32_t tf_s4;
|
|
uint32_t tf_s5;
|
|
uint32_t tf_s6;
|
|
uint32_t tf_s7;
|
|
uint32_t tf_t8;
|
|
uint32_t tf_t9;
|
|
uint32_t tf_k0; /* dummy (see exception-mips1.S comments) */
|
|
uint32_t tf_k1; /* dummy */
|
|
uint32_t tf_gp;
|
|
uint32_t tf_sp;
|
|
uint32_t tf_s8;
|
|
uint32_t tf_epc; /* coprocessor 0 epc register */
|
|
};
|
|
|
|
/*
|
|
* MIPS exception codes.
|
|
*/
|
|
#define EX_IRQ 0 /* Interrupt */
|
|
#define EX_MOD 1 /* TLB Modify (write to read-only page) */
|
|
#define EX_TLBL 2 /* TLB miss on load */
|
|
#define EX_TLBS 3 /* TLB miss on store */
|
|
#define EX_ADEL 4 /* Address error on load */
|
|
#define EX_ADES 5 /* Address error on store */
|
|
#define EX_IBE 6 /* Bus error on instruction fetch */
|
|
#define EX_DBE 7 /* Bus error on data load *or* store */
|
|
#define EX_SYS 8 /* Syscall */
|
|
#define EX_BP 9 /* Breakpoint */
|
|
#define EX_RI 10 /* Reserved (illegal) instruction */
|
|
#define EX_CPU 11 /* Coprocessor unusable */
|
|
#define EX_OVF 12 /* Arithmetic overflow */
|
|
|
|
/*
|
|
* Function to enter user mode. Does not return. The trapframe must
|
|
* be on the thread's own stack or bad things will happen.
|
|
*/
|
|
__DEAD void mips_usermode(struct trapframe *tf);
|
|
|
|
/*
|
|
* Arrays used to load the kernel stack and curthread on trap entry.
|
|
*/
|
|
extern vaddr_t cpustacks[];
|
|
extern vaddr_t cputhreads[];
|
|
|
|
|
|
#endif /* _MIPS_TRAPFRAME_H_ */
|