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107 |
jeremybenn |
/* inst-set-test.S. Instruction set test library for Or1ksim
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*
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* Copyright (C) 1999-2006 OpenCores
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* Copyright (C) 2010 Embecosm Limited
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*
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* Contributors various OpenCores participants
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* Contributor Jeremy Bennett
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*
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* This file is part of OpenRISC 1000 Architectural Simulator.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see .
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*/
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/* ----------------------------------------------------------------------------
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* Coding conventions
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*
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* A simple rising stack is provided starting at _stack and pointed to by
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* r1. r1 points to the next free word. Only 32-bit registers may be pushed
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* onto the stack.
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*
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* Local labels up to 49 are reserved for macros. Each is used only once in
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* all macros. You can get in a serious mess if you get local label clashing
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* in macros.
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*
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* Arguments to functions are passed in r3 through r8.
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* r9 is the link (return address)
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* r11 is for returning results
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*
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116 |
jeremybenn |
* All registers apart from r2, r9 and r11 are preserved across function calls.
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107 |
jeremybenn |
* ------------------------------------------------------------------------- */
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/* ----------------------------------------------------------------------------
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* This library contains the stack implementation and reset sequence and a set
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* of library functions.
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*
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* The functions provided here provide simple utilities that are useful when
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* writing tests in assembler.
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* ------------------------------------------------------------------------- */
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#include "inst-set-test.h"
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/* ----------------------------------------------------------------------------
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* Simple stack, will be pointed to by r1, which is the next empty slot
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* ------------------------------------------------------------------------- */
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.section .stack
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.balign 4
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.global _stack
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_stack:
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.space 0x1000,0x0
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/* ----------------------------------------------------------------------------
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* Exception handling
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* ------------------------------------------------------------------------- */
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.section .boot-text
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/* ----------------------------------------------------------------------------
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* Reset exception
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*
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* Set up the stack and jump to _start
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* ------------------------------------------------------------------------- */
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.org 0x100
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.global _reset
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_reset:
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787 |
jeremybenn |
// Clear R0 on start-up. There is no guarantee that R0 is hardwired to zero,
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// and indeed it is not when simulating the or1200 Verilog core.
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l.andi r0,r0,0x0
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107 |
jeremybenn |
l.movhi r1,hi(_stack) /* Set up the stack */
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l.ori r1,r1,lo(_stack)
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l.j _start /* Jump to the start of code */
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l.nop
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/* ----------------------------------------------------------------------------
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121 |
jeremybenn |
* Alignment exception
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107 |
jeremybenn |
*
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* Don't be tempted to use the LOAD_STR macro here, it will dump us back into
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121 |
jeremybenn |
* text section.
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*
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* The handling is a bit dubious at present. We just patch the instruction and
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* restart. This will go wrong in branch delay slots. Really we need to single
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* step past and then continue.
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*
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* Print a message identifying the exception type.
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107 |
jeremybenn |
* ------------------------------------------------------------------------- */
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.section .rodata
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121 |
jeremybenn |
50: .string " ALIGNMENT exception\n"
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107 |
jeremybenn |
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.section .boot-text
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121 |
jeremybenn |
.org 0x600
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.global _align
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_align:
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/* Report exception */
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107 |
jeremybenn |
LOAD_CONST (r3, 50b)
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l.jal _puts
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l.nop
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121 |
jeremybenn |
/* Patch with l.nop */
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l.mfspr r2,r0,SPR_EPCR_BASE /* Addr of problem instr */
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LOAD_CONST (r3, 0x15000000) /* l.nop */
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l.sw 0(r2),r3
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/* All done */
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l.rfe
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_align_end:
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/* ----------------------------------------------------------------------------
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* Illegal instruction exception
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*
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* Don't be tempted to use the LOAD_STR macro here, it will dump us back into
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* text section.
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*
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* The handling is a bit dubious at present. We just patch the instruction and
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* restart. This will go wrong in branch delay slots. Really we need to single
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* step past and then continue.
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*
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* Print a message identifying the exception type.
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* ------------------------------------------------------------------------- */
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.section .rodata
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51: .string " ILLEGAL INSTRUCTION exception\n"
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.section .boot-text
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.org 0x700
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.global _illegal
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_illegal:
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/* Report exception */
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107 |
jeremybenn |
LOAD_CONST (r3, 51b)
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l.jal _puts
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l.nop
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| 142 |
121 |
jeremybenn |
/* Patch with l.nop */
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| 143 |
107 |
jeremybenn |
l.mfspr r2,r0,SPR_EPCR_BASE /* Addr of problem instr */
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| 144 |
121 |
jeremybenn |
LOAD_CONST (r3, 0x15000000) /* l.nop */
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l.sw 0(r2),r3
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| 146 |
107 |
jeremybenn |
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| 147 |
121 |
jeremybenn |
/* All done */
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l.rfe
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_illegal_end:
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| 151 |
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/* ----------------------------------------------------------------------------
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* Range exception
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*
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* Don't be tempted to use the LOAD_STR macro here, it will dump us back into
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| 155 |
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* text section.
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| 156 |
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*
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| 157 |
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* The handling is a bit dubious at present. We just patch the instruction and
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| 158 |
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* restart. This will go wrong in branch delay slots. Really we need to single
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| 159 |
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* step past and then continue.
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| 160 |
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*
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* Print a message identifying the exception type.
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| 162 |
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* ------------------------------------------------------------------------- */
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.section .rodata
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52: .string " RANGE exception\n"
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| 166 |
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.section .boot-text
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.org 0xb00
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.global _range
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_range:
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/* Report exception */
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| 171 |
107 |
jeremybenn |
LOAD_CONST (r3, 52b)
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l.jal _puts
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| 173 |
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l.nop
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| 175 |
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/* Patch with l.nop */
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| 176 |
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l.mfspr r2,r0,SPR_EPCR_BASE /* Addr of problem instr */
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| 177 |
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LOAD_CONST (r3, 0x15000000) /* l.nop */
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l.sw 0(r2),r3
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| 180 |
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/* All done */
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| 181 |
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l.rfe
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| 182 |
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_range_end:
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| 183 |
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| 184 |
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/* ----------------------------------------------------------------------------
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| 185 |
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* End of exception vectors
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| 186 |
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*
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| 187 |
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* Guarantee the exception vector space does not have general purpose code
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| 188 |
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* ------------------------------------------------------------------------- */
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| 189 |
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.org 0xffc
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| 190 |
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l.nop
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| 191 |
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| 192 |
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/* ----------------------------------------------------------------------------
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| 193 |
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* All subroutines are in the text section.
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| 194 |
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* ------------------------------------------------------------------------- */
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.section .text
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| 196 |
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| 197 |
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/* ----------------------------------------------------------------------------
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* Subroutine to print out a string
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| 199 |
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*
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| 200 |
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* The string is followed by a newline
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*
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| 202 |
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* Parameters:
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| 203 |
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* r3 Pointer to the string to print
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| 204 |
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* ------------------------------------------------------------------------- */
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.global _puts
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_puts:
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| 207 |
116 |
jeremybenn |
PUSH (r3)
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107 |
jeremybenn |
l.add r2,r0,r3 /* Copy the string pointer */
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| 210 |
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/* Loop getting and printing each char until end of string */
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60: l.lbz r3,0(r2)
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l.sfeq r3,r0 /* NULL termination? */
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l.bf 61f
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| 214 |
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| 215 |
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l.addi r2,r2,1 /* Delay slot, move to next char */
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| 216 |
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l.j 60b /* Repeat */
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| 217 |
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l.nop NOP_PUTC /* Delay slot */
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| 218 |
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| 219 |
116 |
jeremybenn |
61: POP (r3)
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| 220 |
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l.jr r9 /* Return */
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| 221 |
107 |
jeremybenn |
l.nop
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| 222 |
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| 223 |
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/* ----------------------------------------------------------------------------
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| 224 |
116 |
jeremybenn |
* Subroutine to print out a register in hex
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| 225 |
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*
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| 226 |
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* Parameters:
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| 227 |
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* r3 The value to print
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| 228 |
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* ------------------------------------------------------------------------- */
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| 229 |
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.section .rodata
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| 230 |
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62: .string "0123456789abcdef"
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| 231 |
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.section .text
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| 232 |
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| 233 |
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.global _puth
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| 234 |
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_puth:
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| 235 |
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PUSH (r3)
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| 236 |
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PUSH (r4)
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| 237 |
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| 238 |
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l.add r2,r0,r3 /* Copy the value pointer */
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| 239 |
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LOAD_CONST (r4,62b) /* Ptr to digit chars */
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| 240 |
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| 241 |
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l.srli r3,r2,28 /* Print each digit in turn. */
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| 242 |
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l.add r3,r4,r3
|
| 243 |
|
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l.lbz r3,0(r3)
|
| 244 |
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l.nop NOP_PUTC
|
| 245 |
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|
| 246 |
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l.srli r3,r2,24
|
| 247 |
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l.andi r3,r3,0xf
|
| 248 |
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l.add r3,r4,r3
|
| 249 |
|
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l.lbz r3,0(r3)
|
| 250 |
|
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l.nop NOP_PUTC
|
| 251 |
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|
| 252 |
|
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l.srli r3,r2,20
|
| 253 |
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l.andi r3,r3,0xf
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| 254 |
|
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l.add r3,r4,r3
|
| 255 |
|
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l.lbz r3,0(r3)
|
| 256 |
|
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l.nop NOP_PUTC
|
| 257 |
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|
| 258 |
|
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l.srli r3,r2,16
|
| 259 |
|
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l.andi r3,r3,0xf
|
| 260 |
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l.add r3,r4,r3
|
| 261 |
|
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l.lbz r3,0(r3)
|
| 262 |
|
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l.nop NOP_PUTC
|
| 263 |
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|
|
| 264 |
|
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l.srli r3,r2,12
|
| 265 |
|
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l.andi r3,r3,0xf
|
| 266 |
|
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l.add r3,r4,r3
|
| 267 |
|
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l.lbz r3,0(r3)
|
| 268 |
|
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l.nop NOP_PUTC
|
| 269 |
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|
|
| 270 |
|
|
l.srli r3,r2,8
|
| 271 |
|
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l.andi r3,r3,0xf
|
| 272 |
|
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l.add r3,r4,r3
|
| 273 |
|
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l.lbz r3,0(r3)
|
| 274 |
|
|
l.nop NOP_PUTC
|
| 275 |
|
|
|
| 276 |
|
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l.srli r3,r2,4
|
| 277 |
|
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l.andi r3,r3,0xf
|
| 278 |
|
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l.add r3,r4,r3
|
| 279 |
|
|
l.lbz r3,0(r3)
|
| 280 |
|
|
l.nop NOP_PUTC
|
| 281 |
|
|
|
| 282 |
|
|
l.andi r3,r2,0xf
|
| 283 |
|
|
l.add r3,r4,r3
|
| 284 |
|
|
l.lbz r3,0(r3)
|
| 285 |
|
|
l.nop NOP_PUTC
|
| 286 |
|
|
|
| 287 |
|
|
POP (r4) /* Return */
|
| 288 |
|
|
POP (r3)
|
| 289 |
|
|
l.jr r9
|
| 290 |
|
|
l.nop
|
| 291 |
|
|
|
| 292 |
|
|
/* ----------------------------------------------------------------------------
|
| 293 |
118 |
jeremybenn |
* Subroutine to print out the lower half of a register in hex
|
| 294 |
|
|
*
|
| 295 |
|
|
* Parameters:
|
| 296 |
|
|
* r3 The value to print
|
| 297 |
|
|
* ------------------------------------------------------------------------- */
|
| 298 |
|
|
.section .rodata
|
| 299 |
|
|
63: .string "0123456789abcdef"
|
| 300 |
|
|
.section .text
|
| 301 |
|
|
|
| 302 |
|
|
.global _puthh
|
| 303 |
|
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_puthh:
|
| 304 |
|
|
PUSH (r3)
|
| 305 |
|
|
PUSH (r4)
|
| 306 |
|
|
|
| 307 |
|
|
l.add r2,r0,r3 /* Copy the value pointer */
|
| 308 |
|
|
LOAD_CONST (r4,63b) /* Ptr to digit chars */
|
| 309 |
|
|
|
| 310 |
|
|
l.srli r3,r2,12 /* Print each digit in turn. */
|
| 311 |
|
|
l.andi r3,r3,0xf
|
| 312 |
|
|
l.add r3,r4,r3
|
| 313 |
|
|
l.lbz r3,0(r3)
|
| 314 |
|
|
l.nop NOP_PUTC
|
| 315 |
|
|
|
| 316 |
|
|
l.srli r3,r2,8
|
| 317 |
|
|
l.andi r3,r3,0xf
|
| 318 |
|
|
l.add r3,r4,r3
|
| 319 |
|
|
l.lbz r3,0(r3)
|
| 320 |
|
|
l.nop NOP_PUTC
|
| 321 |
|
|
|
| 322 |
|
|
l.srli r3,r2,4
|
| 323 |
|
|
l.andi r3,r3,0xf
|
| 324 |
|
|
l.add r3,r4,r3
|
| 325 |
|
|
l.lbz r3,0(r3)
|
| 326 |
|
|
l.nop NOP_PUTC
|
| 327 |
|
|
|
| 328 |
|
|
l.andi r3,r2,0xf
|
| 329 |
|
|
l.add r3,r4,r3
|
| 330 |
|
|
l.lbz r3,0(r3)
|
| 331 |
|
|
l.nop NOP_PUTC
|
| 332 |
|
|
|
| 333 |
|
|
POP (r4) /* Return */
|
| 334 |
|
|
POP (r3)
|
| 335 |
|
|
l.jr r9
|
| 336 |
|
|
l.nop
|
| 337 |
|
|
|
| 338 |
|
|
/* ----------------------------------------------------------------------------
|
| 339 |
|
|
* Subroutine to print out the lowest byte of a register in hex
|
| 340 |
|
|
*
|
| 341 |
|
|
* Parameters:
|
| 342 |
|
|
* r3 The value to print
|
| 343 |
|
|
* ------------------------------------------------------------------------- */
|
| 344 |
|
|
.section .rodata
|
| 345 |
|
|
63: .string "0123456789abcdef"
|
| 346 |
|
|
.section .text
|
| 347 |
|
|
|
| 348 |
|
|
.global _puthq
|
| 349 |
|
|
_puthq:
|
| 350 |
|
|
PUSH (r3)
|
| 351 |
|
|
PUSH (r4)
|
| 352 |
|
|
|
| 353 |
|
|
l.add r2,r0,r3 /* Copy the value pointer */
|
| 354 |
|
|
LOAD_CONST (r4,63b) /* Ptr to digit chars */
|
| 355 |
|
|
|
| 356 |
|
|
l.srli r3,r2,4 /* Print each digit in turn. */
|
| 357 |
|
|
l.andi r3,r3,0xf
|
| 358 |
|
|
l.add r3,r4,r3
|
| 359 |
|
|
l.lbz r3,0(r3)
|
| 360 |
|
|
l.nop NOP_PUTC
|
| 361 |
|
|
|
| 362 |
|
|
l.andi r3,r2,0xf
|
| 363 |
|
|
l.add r3,r4,r3
|
| 364 |
|
|
l.lbz r3,0(r3)
|
| 365 |
|
|
l.nop NOP_PUTC
|
| 366 |
|
|
|
| 367 |
|
|
POP (r4) /* Return */
|
| 368 |
|
|
POP (r3)
|
| 369 |
|
|
l.jr r9
|
| 370 |
|
|
l.nop
|
| 371 |
|
|
|
| 372 |
|
|
/* ----------------------------------------------------------------------------
|
| 373 |
107 |
jeremybenn |
* Subroutine to print out a test name prompt
|
| 374 |
|
|
*
|
| 375 |
|
|
* The string is preceded by two spaces
|
| 376 |
|
|
*
|
| 377 |
|
|
* Parameters:
|
| 378 |
|
|
* r3 Pointer to the test name to print
|
| 379 |
|
|
* ------------------------------------------------------------------------- */
|
| 380 |
|
|
.global _ptest
|
| 381 |
|
|
_ptest:
|
| 382 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 383 |
|
|
PUSH (r3) /* Save the test name for later */
|
| 384 |
107 |
jeremybenn |
|
| 385 |
116 |
jeremybenn |
LOAD_STR (r3, " ") /* Prefix */
|
| 386 |
107 |
jeremybenn |
l.jal _puts
|
| 387 |
|
|
l.nop
|
| 388 |
|
|
|
| 389 |
|
|
POP(r3) /* Test name */
|
| 390 |
|
|
l.jal _puts
|
| 391 |
|
|
l.nop
|
| 392 |
|
|
|
| 393 |
|
|
POP (r9)
|
| 394 |
|
|
l.jr r9
|
| 395 |
|
|
l.nop
|
| 396 |
|
|
|
| 397 |
|
|
/* ----------------------------------------------------------------------------
|
| 398 |
|
|
* Subroutine to print out "OK"
|
| 399 |
|
|
*
|
| 400 |
|
|
* The string is followed by a newline
|
| 401 |
|
|
* ------------------------------------------------------------------------- */
|
| 402 |
|
|
.global _pok
|
| 403 |
|
|
_pok:
|
| 404 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 405 |
|
|
PUSH (r3)
|
| 406 |
107 |
jeremybenn |
|
| 407 |
116 |
jeremybenn |
LOAD_STR (r3, "OK\n")
|
| 408 |
107 |
jeremybenn |
l.jal _puts
|
| 409 |
|
|
l.nop
|
| 410 |
|
|
|
| 411 |
116 |
jeremybenn |
POP (r3)
|
| 412 |
107 |
jeremybenn |
POP (r9)
|
| 413 |
|
|
l.jr r9
|
| 414 |
|
|
l.nop
|
| 415 |
|
|
|
| 416 |
|
|
/* ----------------------------------------------------------------------------
|
| 417 |
|
|
* Subroutine to print out "Failed"
|
| 418 |
|
|
*
|
| 419 |
|
|
* The string is followed by a ": ", which will then allow a report
|
| 420 |
|
|
* ------------------------------------------------------------------------- */
|
| 421 |
|
|
.global _pfail
|
| 422 |
|
|
_pfail:
|
| 423 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 424 |
|
|
PUSH (r3)
|
| 425 |
107 |
jeremybenn |
|
| 426 |
116 |
jeremybenn |
LOAD_STR (r3, "Failed: ")
|
| 427 |
107 |
jeremybenn |
l.jal _puts
|
| 428 |
|
|
l.nop
|
| 429 |
|
|
|
| 430 |
116 |
jeremybenn |
POP (r3)
|
| 431 |
107 |
jeremybenn |
POP (r9)
|
| 432 |
|
|
l.jr r9
|
| 433 |
|
|
l.nop
|
| 434 |
|
|
|
| 435 |
|
|
/* ----------------------------------------------------------------------------
|
| 436 |
|
|
* Subroutine to print out "TRUE"
|
| 437 |
|
|
* ------------------------------------------------------------------------- */
|
| 438 |
|
|
.global _ptrue
|
| 439 |
|
|
_ptrue:
|
| 440 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 441 |
|
|
PUSH (r3)
|
| 442 |
107 |
jeremybenn |
|
| 443 |
116 |
jeremybenn |
LOAD_STR (r3, "TRUE")
|
| 444 |
107 |
jeremybenn |
l.jal _puts
|
| 445 |
|
|
l.nop
|
| 446 |
|
|
|
| 447 |
116 |
jeremybenn |
POP (r3)
|
| 448 |
107 |
jeremybenn |
POP (r9)
|
| 449 |
|
|
l.jr r9
|
| 450 |
|
|
l.nop
|
| 451 |
|
|
|
| 452 |
|
|
/* ----------------------------------------------------------------------------
|
| 453 |
|
|
* Subroutine to print out "FALSE"
|
| 454 |
|
|
* ------------------------------------------------------------------------- */
|
| 455 |
|
|
.global _pfalse
|
| 456 |
|
|
_pfalse:
|
| 457 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 458 |
|
|
PUSH (r3)
|
| 459 |
107 |
jeremybenn |
|
| 460 |
116 |
jeremybenn |
LOAD_STR (r3, "FALSE")
|
| 461 |
107 |
jeremybenn |
l.jal _puts
|
| 462 |
|
|
l.nop
|
| 463 |
|
|
|
| 464 |
116 |
jeremybenn |
POP (r3)
|
| 465 |
107 |
jeremybenn |
POP (r9)
|
| 466 |
|
|
l.jr r9
|
| 467 |
|
|
l.nop
|
| 468 |
|
|
|
| 469 |
|
|
/* ----------------------------------------------------------------------------
|
| 470 |
|
|
* Subroutine to print out "unexpected"
|
| 471 |
|
|
*
|
| 472 |
|
|
* Preceded by a space and followed by a newline
|
| 473 |
|
|
* ------------------------------------------------------------------------- */
|
| 474 |
|
|
.global _punexpected
|
| 475 |
|
|
_punexpected:
|
| 476 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 477 |
|
|
PUSH (r3)
|
| 478 |
107 |
jeremybenn |
|
| 479 |
116 |
jeremybenn |
LOAD_STR (r3, " unexpected\n")
|
| 480 |
107 |
jeremybenn |
l.jal _puts
|
| 481 |
|
|
l.nop
|
| 482 |
|
|
|
| 483 |
116 |
jeremybenn |
POP (r3)
|
| 484 |
107 |
jeremybenn |
POP (r9)
|
| 485 |
|
|
l.jr r9
|
| 486 |
|
|
l.nop
|
