44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
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/***************************************************************************************
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* Copyright (c) 2014-2022 Zihao Yu, Nanjing University
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*
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* NEMU is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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*
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* See the Mulan PSL v2 for more details.
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***************************************************************************************/
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#include <isa.h>
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#include <memory/paddr.h>
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// this is not consistent with uint8_t
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// but it is ok since we do not access the array directly
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static const uint32_t img [] = {
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0x00000297, // auipc t0,0
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0x00028823, // sb zero,16(t0)
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0x0102c503, // lbu a0,16(t0)
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0x00100073, // ebreak (used as nemu_trap)
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0xdeadbeef, // some data
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};
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static void restart() {
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/* Set the initial program counter. */
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cpu.pc = RESET_VECTOR;
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/* The zero register is always 0. */
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cpu.gpr[0] = 0;
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}
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void init_isa() {
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/* Load built-in image. */
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memcpy(guest_to_host(RESET_VECTOR), img, sizeof(img));
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/* Initialize this virtual computer system. */
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restart();
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}
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