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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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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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* 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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* text space.
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*
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* Print a message about the instruction triggering the exception. Then
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* replace it by l.nop and return.
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* ------------------------------------------------------------------------- */
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.section .rodata
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50: .string " RANGE exception\n"
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51: .string " - caused by: "
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52: .string " - SR value: "
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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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/* Note exception */
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LOAD_CONST (r3, 50b)
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l.jal _puts
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l.nop
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/* Report problem instruction */
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LOAD_CONST (r3, 51b)
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l.jal _puts
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l.nop
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l.mfspr r2,r0,SPR_EPCR_BASE /* Addr of problem instr */
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l.lws r3,0(r2) /* The actual instruction */
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l.nop NOP_REPORT
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/* Report status register */
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LOAD_CONST (r3, 52b)
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l.jal _puts
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l.nop
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l.mfspr r3,r0,SPR_ESR_BASE /* Status reg */
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l.nop NOP_REPORT
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/* 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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_range_end:
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/* ----------------------------------------------------------------------------
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* End of exception vectors
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*
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* Guarantee the exception vector space does not have general purpose code
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* ------------------------------------------------------------------------- */
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.org 0xffc
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l.nop
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/* ----------------------------------------------------------------------------
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* All subroutines are in the text section.
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* ------------------------------------------------------------------------- */
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.section .text
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/* ----------------------------------------------------------------------------
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* Subroutine to print out a string
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*
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* The string is followed by a newline
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*
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* Parameters:
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* r3 Pointer to the string to print
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* ------------------------------------------------------------------------- */
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.global _puts
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_puts:
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116 |
jeremybenn |
PUSH (r3)
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107 |
jeremybenn |
l.add r2,r0,r3 /* Copy the string pointer */
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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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l.addi r2,r2,1 /* Delay slot, move to next char */
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l.j 60b /* Repeat */
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l.nop NOP_PUTC /* Delay slot */
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116 |
jeremybenn |
61: POP (r3)
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l.jr r9 /* Return */
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107 |
jeremybenn |
l.nop
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/* ----------------------------------------------------------------------------
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116 |
jeremybenn |
* Subroutine to print out a register in hex
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*
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* Parameters:
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* r3 The value to print
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* ------------------------------------------------------------------------- */
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.section .rodata
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62: .string "0123456789abcdef"
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.section .text
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.global _puth
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_puth:
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PUSH (r3)
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PUSH (r4)
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l.add r2,r0,r3 /* Copy the value pointer */
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LOAD_CONST (r4,62b) /* Ptr to digit chars */
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l.srli r3,r2,28 /* Print each digit in turn. */
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l.add r3,r4,r3
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l.lbz r3,0(r3)
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l.nop NOP_PUTC
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l.srli r3,r2,24
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l.andi r3,r3,0xf
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l.add r3,r4,r3
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l.lbz r3,0(r3)
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l.nop NOP_PUTC
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l.srli r3,r2,20
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l.andi r3,r3,0xf
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l.add r3,r4,r3
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l.lbz r3,0(r3)
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l.nop NOP_PUTC
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l.srli r3,r2,16
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l.andi r3,r3,0xf
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l.add r3,r4,r3
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l.lbz r3,0(r3)
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l.nop NOP_PUTC
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l.srli r3,r2,12
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l.andi r3,r3,0xf
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l.add r3,r4,r3
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l.lbz r3,0(r3)
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l.nop NOP_PUTC
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| 216 |
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l.srli r3,r2,8
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l.andi r3,r3,0xf
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l.add r3,r4,r3
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| 219 |
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l.lbz r3,0(r3)
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| 220 |
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l.nop NOP_PUTC
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| 222 |
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l.srli r3,r2,4
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| 223 |
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l.andi r3,r3,0xf
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| 224 |
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l.add r3,r4,r3
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| 225 |
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l.lbz r3,0(r3)
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| 226 |
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l.nop NOP_PUTC
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| 228 |
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l.andi r3,r2,0xf
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| 229 |
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l.add r3,r4,r3
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l.lbz r3,0(r3)
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| 231 |
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l.nop NOP_PUTC
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| 233 |
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POP (r4) /* Return */
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POP (r3)
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l.jr r9
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| 236 |
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l.nop
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| 237 |
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| 238 |
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/* ----------------------------------------------------------------------------
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| 239 |
107 |
jeremybenn |
* Subroutine to print out a test name prompt
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| 240 |
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*
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| 241 |
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* The string is preceded by two spaces
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| 242 |
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*
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| 243 |
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* Parameters:
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| 244 |
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* r3 Pointer to the test name to print
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| 245 |
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* ------------------------------------------------------------------------- */
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| 246 |
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.global _ptest
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| 247 |
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_ptest:
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| 248 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
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| 249 |
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PUSH (r3) /* Save the test name for later */
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| 250 |
107 |
jeremybenn |
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| 251 |
116 |
jeremybenn |
LOAD_STR (r3, " ") /* Prefix */
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| 252 |
107 |
jeremybenn |
l.jal _puts
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| 253 |
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l.nop
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| 254 |
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| 255 |
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POP(r3) /* Test name */
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| 256 |
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l.jal _puts
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| 257 |
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l.nop
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| 258 |
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| 259 |
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POP (r9)
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| 260 |
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l.jr r9
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| 261 |
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l.nop
|
| 262 |
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| 263 |
|
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/* ----------------------------------------------------------------------------
|
| 264 |
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* Subroutine to print out "OK"
|
| 265 |
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*
|
| 266 |
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* The string is followed by a newline
|
| 267 |
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* ------------------------------------------------------------------------- */
|
| 268 |
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.global _pok
|
| 269 |
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_pok:
|
| 270 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 271 |
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PUSH (r3)
|
| 272 |
107 |
jeremybenn |
|
| 273 |
116 |
jeremybenn |
LOAD_STR (r3, "OK\n")
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| 274 |
107 |
jeremybenn |
l.jal _puts
|
| 275 |
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l.nop
|
| 276 |
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|
| 277 |
116 |
jeremybenn |
POP (r3)
|
| 278 |
107 |
jeremybenn |
POP (r9)
|
| 279 |
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l.jr r9
|
| 280 |
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l.nop
|
| 281 |
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|
|
| 282 |
|
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/* ----------------------------------------------------------------------------
|
| 283 |
|
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* Subroutine to print out "Failed"
|
| 284 |
|
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*
|
| 285 |
|
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* The string is followed by a ": ", which will then allow a report
|
| 286 |
|
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* ------------------------------------------------------------------------- */
|
| 287 |
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.global _pfail
|
| 288 |
|
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_pfail:
|
| 289 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 290 |
|
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PUSH (r3)
|
| 291 |
107 |
jeremybenn |
|
| 292 |
116 |
jeremybenn |
LOAD_STR (r3, "Failed: ")
|
| 293 |
107 |
jeremybenn |
l.jal _puts
|
| 294 |
|
|
l.nop
|
| 295 |
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|
|
| 296 |
116 |
jeremybenn |
POP (r3)
|
| 297 |
107 |
jeremybenn |
POP (r9)
|
| 298 |
|
|
l.jr r9
|
| 299 |
|
|
l.nop
|
| 300 |
|
|
|
| 301 |
|
|
/* ----------------------------------------------------------------------------
|
| 302 |
|
|
* Subroutine to print out "TRUE"
|
| 303 |
|
|
* ------------------------------------------------------------------------- */
|
| 304 |
|
|
.global _ptrue
|
| 305 |
|
|
_ptrue:
|
| 306 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 307 |
|
|
PUSH (r3)
|
| 308 |
107 |
jeremybenn |
|
| 309 |
116 |
jeremybenn |
LOAD_STR (r3, "TRUE")
|
| 310 |
107 |
jeremybenn |
l.jal _puts
|
| 311 |
|
|
l.nop
|
| 312 |
|
|
|
| 313 |
116 |
jeremybenn |
POP (r3)
|
| 314 |
107 |
jeremybenn |
POP (r9)
|
| 315 |
|
|
l.jr r9
|
| 316 |
|
|
l.nop
|
| 317 |
|
|
|
| 318 |
|
|
/* ----------------------------------------------------------------------------
|
| 319 |
|
|
* Subroutine to print out "FALSE"
|
| 320 |
|
|
* ------------------------------------------------------------------------- */
|
| 321 |
|
|
.global _pfalse
|
| 322 |
|
|
_pfalse:
|
| 323 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 324 |
|
|
PUSH (r3)
|
| 325 |
107 |
jeremybenn |
|
| 326 |
116 |
jeremybenn |
LOAD_STR (r3, "FALSE")
|
| 327 |
107 |
jeremybenn |
l.jal _puts
|
| 328 |
|
|
l.nop
|
| 329 |
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|
|
| 330 |
116 |
jeremybenn |
POP (r3)
|
| 331 |
107 |
jeremybenn |
POP (r9)
|
| 332 |
|
|
l.jr r9
|
| 333 |
|
|
l.nop
|
| 334 |
|
|
|
| 335 |
|
|
/* ----------------------------------------------------------------------------
|
| 336 |
|
|
* Subroutine to print out "unexpected"
|
| 337 |
|
|
*
|
| 338 |
|
|
* Preceded by a space and followed by a newline
|
| 339 |
|
|
* ------------------------------------------------------------------------- */
|
| 340 |
|
|
.global _punexpected
|
| 341 |
|
|
_punexpected:
|
| 342 |
116 |
jeremybenn |
PUSH (r9) /* Save the return address */
|
| 343 |
|
|
PUSH (r3)
|
| 344 |
107 |
jeremybenn |
|
| 345 |
116 |
jeremybenn |
LOAD_STR (r3, " unexpected\n")
|
| 346 |
107 |
jeremybenn |
l.jal _puts
|
| 347 |
|
|
l.nop
|
| 348 |
|
|
|
| 349 |
116 |
jeremybenn |
POP (r3)
|
| 350 |
107 |
jeremybenn |
POP (r9)
|
| 351 |
|
|
l.jr r9
|
| 352 |
|
|
l.nop
|
