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jeremybenn |
/* lws-test.S. l.lws instruction test of Or1ksim
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Copyright (C) 1999-2006 OpenCores
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Copyright (C) 2010 Embecosm Limited
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Contributors various OpenCores participants
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Contributor Jeremy Bennett
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This file is part of OpenRISC 1000 Architectural Simulator.
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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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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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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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* Test coverage
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*
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* The l.lws instruction was omitted from Or1ksim originally. It is specified
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* for ORBIS32, even though it is functionally equivalent to l.lwz.
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*
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* Having fixed the problem, this is (in good software engineering style), a
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* regresison test to go with the fix.
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*
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* Of course what is really needed is a comprehensive instruction test...
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* ------------------------------------------------------------------------- */
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#include "spr-defs.h"
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#include "board.h"
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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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* Temporary labels up to 49 are reserved for macros and subroutines. Each is
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* used only once in any macro or subroutine. You can get in a serious mess if
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* you get local label clashing 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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* r2 through r11 are not preserved across calls. All other registers are.
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* ------------------------------------------------------------------------- */
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/* ----------------------------------------------------------------------------
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* Memory controller constants
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* ------------------------------------------------------------------------- */
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#define MEM_RAM 0x00000000
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#define MC_CSR (0x00)
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#define MC_POC (0x04)
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#define MC_BA_MASK (0x08)
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#define MC_CSC(i) (0x10 + (i) * 8)
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#define MC_TMS(i) (0x14 + (i) * 8)
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/* ----------------------------------------------------------------------------
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* Useful constants
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* ------------------------------------------------------------------------- */
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/* Indicator of completion */
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#define ALL_DONE (0xdeaddead)
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/* Logical values */
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#define TRUE 1
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#define FALSE 0
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/* ----------------------------------------------------------------------------
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* Macro to push a register onto the stack
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*
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* r1 points to the next free slot. Push the supplied register on, then
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* advance the stack pointer.
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*
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* Arguments:
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* reg The register to push
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*
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* Registers modified
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* r1
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* ------------------------------------------------------------------------- */
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#define PUSH(reg) \
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l.sw 0(r1),reg /* Push */ ;\
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l.addi r1,r1,4 /* Advance the stack */
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/* ----------------------------------------------------------------------------
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* Macro to pop a register off the stack
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*
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* r1 points to the next free slot. Decrement the stack pointer, then pop the
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* requested register.
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*
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* Arguments:
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* reg The register to pop
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*
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* Registers modified
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* r1
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* ------------------------------------------------------------------------- */
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#define POP(reg) \
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l.addi r1,r1,-4 /* Decrement the stack */ ;\
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l.lws reg,0(r1) /* Pop */
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/* ----------------------------------------------------------------------------
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* Macro to load a 32-bit constant into a register
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*
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* Arguments:
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* reg The register to load
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* val The value to load
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*
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* ------------------------------------------------------------------------- */
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#define LOAD_CONST(reg,val) \
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l.movhi reg,hi(val) ;\
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l.ori reg,reg,lo(val)
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/* ----------------------------------------------------------------------------
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* Macro to define and load a pointer to a string
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*
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* Arguments:
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* reg The register to load
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* str The string
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*
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* ------------------------------------------------------------------------- */
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#define LOAD_STR(reg,str) \
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.section .rodata ;\
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1: ;\
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.string str ;\
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;\
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.section .text ;\
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l.movhi reg,hi(1b) ;\
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l.ori reg,reg,lo(1b)
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/* ----------------------------------------------------------------------------
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* Macro to print a character
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*
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* Arguments:
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* c The character to print
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* ------------------------------------------------------------------------- */
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#define PUTC(c) \
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l.addi r3,r0,c ;\
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l.nop NOP_PUTC
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/* ----------------------------------------------------------------------------
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* Macro for recording the result of a test
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*
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* The test result is in r4. Print out the name of test indented two spaces,
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* followed by ": ", either "OK" or "Failed" and a newline.
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*
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* Arguments:
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* str Textual name of the test
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* reg The result to test (not r2)
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* val Desired result of the test
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* ------------------------------------------------------------------------- */
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#define CHECK_RES(str,reg,val) \
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.section .rodata ;\
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2: ;\
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.string str ;\
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;\
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.section .text ;\
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PUSH (reg) /* Save the register to test */ ;\
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;\
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LOAD_CONST (r3,2b) /* Print out the string */ ;\
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l.jal _ptest ;\
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l.nop ;\
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;\
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LOAD_CONST(r2,val) /* The desired result */ ;\
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POP (reg) /* The register to test */ ;\
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PUSH (reg) /* May need again later */ ;\
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l.sfeq r2,reg /* Does the result match? */ ;\
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l.bf 3f ;\
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l.nop ;\
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;\
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l.jal _pfail /* Test failed */ ;\
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l.nop ;\
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POP (reg) /* Report the register */ ;\
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l.add r3,r0,reg ;\
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l.j 4f ;\
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l.nop NOP_REPORT ;\
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3: ;\
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POP (reg) /* Discard the register */ ;\
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l.jal _pok /* Test succeeded */ ;\
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l.nop ;\
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4:
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/* ----------------------------------------------------------------------------
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* Macro for recording the result of a comparison
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*
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* If the flag is set print the string argument indented by 2 spaces, followed
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* by "TRUE" and a newline, otherwise print the string argument indented by
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* two spaces, followed by "FALSE" and a newline.
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*
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* Arguments:
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* str Textual name of the test
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* res Expected result (TRUE or FALSE)
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* ------------------------------------------------------------------------- */
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#define CHECK_FLAG(str,res) \
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.section .rodata ;\
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5: ;\
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.string str ;\
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;\
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.section .text ;\
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l.bnf 7f /* Branch if result FALSE */ ;\
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;\
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/* Branch for TRUE result */ ;\
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LOAD_CONST (r3,5b) /* The string to print */ ;\
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l.jal _ptest ;\
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l.nop ;\
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;\
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l.addi r2,r0,TRUE /* Was it expected? */ ;\
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l.addi r3,r0,res ;\
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l.sfeq r2,r3 ;\
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l.bnf 6f /* Branch if not expected */ ;\
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;\
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/* Sub-branch for TRUE found and expected */ ;\
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l.jal _ptrue ;\
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l.nop ;\
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PUTC ('\n') ;\
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l.j 9f ;\
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l.nop ;\
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6: ;\
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/* Sub-branch for TRUE found and not expected */ ;\
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l.jal _ptrue ;\
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l.nop ;\
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l.jal _punexpected ;\
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l.nop ;\
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l.j 9f ;\
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l.nop ;\
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;\
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7: ;\
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/* Branch for FALSE result */ ;\
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LOAD_CONST (r3,5b) /* The string to print */ ;\
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l.jal _ptest ;\
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l.nop ;\
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;\
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l.addi r2,r0,FALSE /* Was it expected? */ ;\
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l.addi r3,r0,res ;\
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l.sfeq r2,r3 ;\
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l.bnf 8f /* Branch if not expected */ ;\
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;\
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/* Sub-branch for FALSE found and expected */ ;\
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l.jal _pfalse ;\
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l.nop ;\
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PUTC ('\n') ;\
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l.j 9f ;\
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l.nop ;\
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8: ;\
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/* Sub-branch for FALSE found and not expected */ ;\
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l.jal _pfalse ;\
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l.nop ;\
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l.jal _punexpected ;\
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l.nop ;\
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9:
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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 .data
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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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* reset exception
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* ------------------------------------------------------------------------- */
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.section .except, "ax"
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l.addi r1,r0,0
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.section .text
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.org 0x100
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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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| 286 |
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l.movhi r3,hi(_init_mc) /* Code starts with MC setup */
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l.ori r3,r3,lo(_init_mc)
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l.jr r3
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l.nop
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| 290 |
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| 291 |
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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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| 297 |
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* r3 Pointer to the string to print
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| 298 |
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* ------------------------------------------------------------------------- */
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_puts:
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l.add r2,r0,r3 /* Copy the string pointer */
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| 302 |
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/* Loop getting and printing each char until end of string */
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10:
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l.lbz r3,0(r2)
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l.sfeq r3,r0 /* NULL termination? */
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l.bf 11f
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| 308 |
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l.addi r2,r2,1 /* Delay slot, move to next char */
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| 309 |
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l.j 10b /* Repeat */
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| 310 |
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l.nop NOP_PUTC /* Delay slot */
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| 312 |
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11:
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| 313 |
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l.jr r9 /* Return */
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| 314 |
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l.nop
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| 315 |
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| 316 |
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/* ----------------------------------------------------------------------------
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| 317 |
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* Subroutine to print out a test name prompt
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| 318 |
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*
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| 319 |
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* The string is preceded by two spaces
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| 320 |
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*
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| 321 |
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* Parameters:
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| 322 |
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* r3 Pointer to the test name to print
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| 323 |
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* ------------------------------------------------------------------------- */
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| 324 |
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_ptest:
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| 325 |
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PUSH(r9) /* Save the return address */
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| 326 |
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PUSH(r3) /* Save the test name for later */
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| 327 |
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| 328 |
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LOAD_STR(r3, " ") /* Prefix */
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| 329 |
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l.jal _puts
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| 330 |
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l.nop
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| 331 |
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|
| 332 |
|
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POP(r3) /* Test name */
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| 333 |
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l.jal _puts
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| 334 |
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l.nop
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| 335 |
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| 336 |
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POP (r9)
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| 337 |
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l.jr r9
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| 338 |
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| 339 |
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| 340 |
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/* ----------------------------------------------------------------------------
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| 341 |
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* Subroutine to print out "OK"
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| 342 |
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*
|
| 343 |
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* The string is followed by a newline
|
| 344 |
|
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* ------------------------------------------------------------------------- */
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| 345 |
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_pok:
|
| 346 |
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PUSH(r9) /* Save the return address */
|
| 347 |
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| 348 |
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LOAD_STR(r3, "OK\n")
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| 349 |
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l.jal _puts
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| 350 |
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l.nop
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| 351 |
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| 352 |
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POP (r9)
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| 353 |
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l.jr r9
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| 354 |
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| 355 |
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|
| 356 |
|
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/* ----------------------------------------------------------------------------
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| 357 |
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* Subroutine to print out "Failed"
|
| 358 |
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*
|
| 359 |
|
|
* The string is followed by a ": ", which will then allow a report
|
| 360 |
|
|
* ------------------------------------------------------------------------- */
|
| 361 |
|
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_pfail:
|
| 362 |
|
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PUSH(r9) /* Save the return address */
|
| 363 |
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|
| 364 |
|
|
LOAD_STR(r3, "Failed: ")
|
| 365 |
|
|
l.jal _puts
|
| 366 |
|
|
l.nop
|
| 367 |
|
|
|
| 368 |
|
|
POP (r9)
|
| 369 |
|
|
l.jr r9
|
| 370 |
|
|
|
| 371 |
|
|
/* ----------------------------------------------------------------------------
|
| 372 |
|
|
* Subroutine to print out "TRUE"
|
| 373 |
|
|
* ------------------------------------------------------------------------- */
|
| 374 |
|
|
_ptrue:
|
| 375 |
|
|
PUSH(r9) /* Save the return address */
|
| 376 |
|
|
|
| 377 |
|
|
LOAD_STR(r3, "TRUE")
|
| 378 |
|
|
l.jal _puts
|
| 379 |
|
|
l.nop
|
| 380 |
|
|
|
| 381 |
|
|
POP (r9)
|
| 382 |
|
|
l.jr r9
|
| 383 |
|
|
|
| 384 |
|
|
|
| 385 |
|
|
/* ----------------------------------------------------------------------------
|
| 386 |
|
|
* Subroutine to print out "FALSE"
|
| 387 |
|
|
* ------------------------------------------------------------------------- */
|
| 388 |
|
|
_pfalse:
|
| 389 |
|
|
PUSH(r9) /* Save the return address */
|
| 390 |
|
|
|
| 391 |
|
|
LOAD_STR(r3, "FALSE")
|
| 392 |
|
|
l.jal _puts
|
| 393 |
|
|
l.nop
|
| 394 |
|
|
|
| 395 |
|
|
POP (r9)
|
| 396 |
|
|
l.jr r9
|
| 397 |
|
|
|
| 398 |
|
|
/* ----------------------------------------------------------------------------
|
| 399 |
|
|
* Subroutine to print out "unexpected"
|
| 400 |
|
|
*
|
| 401 |
|
|
* Preceded by a space and followed by a newline
|
| 402 |
|
|
* ------------------------------------------------------------------------- */
|
| 403 |
|
|
_punexpected:
|
| 404 |
|
|
PUSH(r9) /* Save the return address */
|
| 405 |
|
|
|
| 406 |
|
|
LOAD_STR(r3, " unexpected\n")
|
| 407 |
|
|
l.jal _puts
|
| 408 |
|
|
l.nop
|
| 409 |
|
|
|
| 410 |
|
|
POP (r9)
|
| 411 |
|
|
l.jr r9
|
| 412 |
|
|
|
| 413 |
|
|
/* ----------------------------------------------------------------------------
|
| 414 |
|
|
* Memory controller initialization initialization
|
| 415 |
|
|
* ------------------------------------------------------------------------- */
|
| 416 |
|
|
_init_mc:
|
| 417 |
|
|
|
| 418 |
|
|
l.movhi r3,hi(MC_BASE_ADDR)
|
| 419 |
|
|
l.ori r3,r3,lo(MC_BASE_ADDR)
|
| 420 |
|
|
|
| 421 |
|
|
l.addi r4,r3,MC_CSC(0)
|
| 422 |
|
|
l.movhi r5,hi(FLASH_BASE_ADDR)
|
| 423 |
|
|
l.srai r5,r5,6
|
| 424 |
|
|
l.ori r5,r5,0x0025
|
| 425 |
|
|
l.sw 0(r4),r5
|
| 426 |
|
|
|
| 427 |
|
|
l.addi r4,r3,MC_TMS(0)
|
| 428 |
|
|
l.movhi r5,hi(FLASH_TMS_VAL)
|
| 429 |
|
|
l.ori r5,r5,lo(FLASH_TMS_VAL)
|
| 430 |
|
|
l.sw 0(r4),r5
|
| 431 |
|
|
|
| 432 |
|
|
l.addi r4,r3,MC_BA_MASK
|
| 433 |
|
|
l.addi r5,r0,MC_MASK_VAL
|
| 434 |
|
|
l.sw 0(r4),r5
|
| 435 |
|
|
|
| 436 |
|
|
l.addi r4,r3,MC_CSR
|
| 437 |
|
|
l.movhi r5,hi(MC_CSR_VAL)
|
| 438 |
|
|
l.ori r5,r5,lo(MC_CSR_VAL)
|
| 439 |
|
|
l.sw 0(r4),r5
|
| 440 |
|
|
|
| 441 |
|
|
l.addi r4,r3,MC_TMS(1)
|
| 442 |
|
|
l.movhi r5,hi(SDRAM_TMS_VAL)
|
| 443 |
|
|
l.ori r5,r5,lo(SDRAM_TMS_VAL)
|
| 444 |
|
|
l.sw 0(r4),r5
|
| 445 |
|
|
|
| 446 |
|
|
l.addi r4,r3,MC_CSC(1)
|
| 447 |
|
|
l.movhi r5,hi(SDRAM_BASE_ADDR)
|
| 448 |
|
|
l.srai r5,r5,6
|
| 449 |
|
|
l.ori r5,r5,0x0411
|
| 450 |
|
|
l.sw 0(r4),r5
|
| 451 |
|
|
|
| 452 |
|
|
/* ----------------------------------------------------------------------------
|
| 453 |
|
|
* Test of load single word and extend with sign: l.lws
|
| 454 |
|
|
* ------------------------------------------------------------------------- */
|
| 455 |
|
|
.section .rodata
|
| 456 |
|
|
50: .word 0xdeadbeef
|
| 457 |
|
|
51: .word 0x00000000
|
| 458 |
|
|
52: .word 0x7fffffff
|
| 459 |
|
|
53: .word 0x80000000
|
| 460 |
|
|
54: .word 0xffffffff
|
| 461 |
|
|
|
| 462 |
|
|
.section .text
|
| 463 |
|
|
_lws:
|
| 464 |
|
|
LOAD_STR (r3, "l.lws\n")
|
| 465 |
|
|
l.jal _puts
|
| 466 |
|
|
l.nop
|
| 467 |
|
|
|
| 468 |
|
|
/* Load with zero offset */
|
| 469 |
|
|
LOAD_CONST (r5,50b)
|
| 470 |
|
|
l.lws r4,0(r5)
|
| 471 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0xdeadbeef: ", r4, 0xdeadbeef)
|
| 472 |
|
|
|
| 473 |
|
|
LOAD_CONST (r5,51b)
|
| 474 |
|
|
l.lws r4,0(r5)
|
| 475 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x00000000: ", r4, 0x00000000)
|
| 476 |
|
|
|
| 477 |
|
|
LOAD_CONST (r5,52b)
|
| 478 |
|
|
l.lws r4,0(r5)
|
| 479 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x7fffffff: ", r4, 0x7fffffff)
|
| 480 |
|
|
|
| 481 |
|
|
LOAD_CONST (r5,53b)
|
| 482 |
|
|
l.lws r4,0(r5)
|
| 483 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x80000000: ", r4, 0x80000000)
|
| 484 |
|
|
|
| 485 |
|
|
LOAD_CONST (r5,54b)
|
| 486 |
|
|
l.lws r4,0(r5)
|
| 487 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0xffffffff: ", r4, 0xffffffff)
|
| 488 |
|
|
|
| 489 |
|
|
/* Load with positive offset */
|
| 490 |
|
|
LOAD_CONST (r5,50b)
|
| 491 |
|
|
l.lws r4,4(r5)
|
| 492 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x00000000: ", r4, 0x00000000)
|
| 493 |
|
|
|
| 494 |
|
|
LOAD_CONST (r5,50b)
|
| 495 |
|
|
l.lws r4,8(r5)
|
| 496 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x7fffffff: ", r4, 0x7fffffff)
|
| 497 |
|
|
|
| 498 |
|
|
LOAD_CONST (r5,50b)
|
| 499 |
|
|
l.lws r4,12(r5)
|
| 500 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x80000000: ", r4, 0x80000000)
|
| 501 |
|
|
|
| 502 |
|
|
LOAD_CONST (r5,50b)
|
| 503 |
|
|
l.lws r4,16(r5)
|
| 504 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0xffffffff: ", r4, 0xffffffff)
|
| 505 |
|
|
|
| 506 |
|
|
/* Load with negative offset */
|
| 507 |
|
|
LOAD_CONST (r5,54b)
|
| 508 |
|
|
l.lws r4,-16(r5)
|
| 509 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0xdeadbeef: ", r4, 0xdeadbeef)
|
| 510 |
|
|
|
| 511 |
|
|
LOAD_CONST (r5,54b)
|
| 512 |
|
|
l.lws r4,-12(r5)
|
| 513 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x00000000: ", r4, 0x00000000)
|
| 514 |
|
|
|
| 515 |
|
|
LOAD_CONST (r5,54b)
|
| 516 |
|
|
l.lws r4,-8(r5)
|
| 517 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x7fffffff: ", r4, 0x7fffffff)
|
| 518 |
|
|
|
| 519 |
|
|
LOAD_CONST (r5,54b)
|
| 520 |
|
|
l.lws r4,-4(r5)
|
| 521 |
|
|
CHECK_RES (" l.lws r4,0(r5): r4=0x80000000: ", r4, 0x80000000)
|
| 522 |
|
|
|
| 523 |
|
|
/* ----------------------------------------------------------------------------
|
| 524 |
|
|
* All done
|
| 525 |
|
|
* ------------------------------------------------------------------------- */
|
| 526 |
|
|
_exit:
|
| 527 |
|
|
LOAD_STR (r3, "Test completed\n")
|
| 528 |
|
|
l.jal _puts
|
| 529 |
|
|
l.nop
|
| 530 |
|
|
|
| 531 |
|
|
l.movhi r3,hi(ALL_DONE)
|
| 532 |
|
|
l.ori r3,r3,lo(ALL_DONE)
|
| 533 |
|
|
l.nop NOP_REPORT /* Should be 0xdeaddead */
|
| 534 |
|
|
|
| 535 |
|
|
l.addi r3,r0,0
|
| 536 |
|
|
l.nop NOP_EXIT
|
