forked from Github_Repos/cvw
68 lines
2.9 KiB
ArmAsm
68 lines
2.9 KiB
ArmAsm
///////////////////////////////////////////
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//
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// WALLY-wait-for-interrupt
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//
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// Author: Kip Macsai-Goren <kmacsaigoren@g.hmc.edu>
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//
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// Created 2022-04-24
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//
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// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
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// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
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// is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
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// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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///////////////////////////////////////////
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#include "WALLY-TEST-LIB-64.h"
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RVTEST_ISA("RV64I")
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RVTEST_CASE(0,"//check ISA:=regex(.*64.*);check ISA:=regex(.*I.*);def TEST_CASE_1=True;def NO_SAIL=True;",wfi)
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INIT_TESTS
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TRAP_HANDLER m, EXT_SIGNATURE=1 // turn on recording mtval and status bits on traps
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li x28, 0x8
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csrs mstatus, x28 // set mstatus.MIE bit to 1
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WRITE_READ_CSR mie, 0xFFF // Enable interrupts from all sources
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// Code copied from test library to cause m time interrupt, with time loop replaced with wfi.
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li x28, 0x60 // Desired offset from the present time
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mv a3, x28 // copy value in to know to stop waiting for interrupt after this many cycles
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la x29, 0x02004000 // MTIMECMP register in CLINT
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la x30, 0x0200BFF8 // MTIME register in CLINT
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lw x7, 0(x30) // low word of MTIME
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lw x31, 4(x30) // high word of MTIME
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add x28, x7, x28 // add desired offset to the current time
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bgtu x28, x7, nowrap // check new time exceeds current time (no wraparound)
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addi x31, x31, 1 // if wrap, increment most significant word
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sw x31,4(x29) // store into most significant word of MTIMECMP
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nowrap:
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sw x28, 0(x29) // store into least significant word of MTIMECMP
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auipc ra, 0x0
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addi ra, ra, 0xC // load address after wfi into ra so we return to the right place after handling the time interrupt
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wfi // test wfi until trap goes off
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li x28, 0x600d111 // magic number "good 111" to write to output after interrupt goes off.
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// this tests whether wfi is a nop or not since we should get the output for the interrupt before this one
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sd x28, 0(x6)
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addi x6, x6, 8
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addi x16, x16, 8
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END_TESTS
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TEST_STACK_AND_DATA
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