xinyangli
2824efad33
NJU-ProjectN/nemu eb63cf3568dbf4e0c3c6ef462e6ec685550fabbc Merge pull request #76 from rijuyuezhu/master
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/***************************************************************************************
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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 <device/map.h>
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#include <device/alarm.h>
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#include <utils.h>
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static uint32_t *rtc_port_base = NULL;
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static void rtc_io_handler(uint32_t offset, int len, bool is_write) {
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assert(offset == 0 || offset == 4);
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if (!is_write && offset == 4) {
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uint64_t us = get_time();
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rtc_port_base[0] = (uint32_t)us;
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rtc_port_base[1] = us >> 32;
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}
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}
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#ifndef CONFIG_TARGET_AM
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static void timer_intr() {
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if (nemu_state.state == NEMU_RUNNING) {
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extern void dev_raise_intr();
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dev_raise_intr();
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}
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}
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#endif
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void init_timer() {
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rtc_port_base = (uint32_t *)new_space(8);
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#ifdef CONFIG_HAS_PORT_IO
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add_pio_map ("rtc", CONFIG_RTC_PORT, rtc_port_base, 8, rtc_io_handler);
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#else
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add_mmio_map("rtc", CONFIG_RTC_MMIO, rtc_port_base, 8, rtc_io_handler);
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#endif
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IFNDEF(CONFIG_TARGET_AM, add_alarm_handle(timer_intr));
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}
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