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Initial Spring 2016 commit.

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Geoffrey Challen
2015-12-23 00:50:04 +00:00
commit cafa9f5690
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kern/arch/mips/include/trapframe.h Normal file
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/*
* 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_ */