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