56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* Copyright 2018 Canaan Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stddef.h>
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#include "env/encoding.h"
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#include "common.h"
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void set_bit(volatile uint32_t* bits, uint32_t mask, uint32_t value)
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{
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uint32_t org = (*bits) & ~mask;
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*bits = org | (value & mask);
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}
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void set_bit_offset(volatile uint32_t* bits, uint32_t mask, size_t offset, uint32_t value)
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{
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set_bit(bits, mask << offset, value << offset);
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}
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void set_gpio_bit(volatile uint32_t* bits, size_t offset, uint32_t value)
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{
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set_bit_offset(bits, 1, offset, value);
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}
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uint32_t get_bit(volatile uint32_t* bits, uint32_t mask, size_t offset)
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{
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return ((*bits) & (mask << offset)) >> offset;
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}
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uint32_t get_gpio_bit(volatile uint32_t* bits, size_t offset)
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{
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return get_bit(bits, 1, offset);
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}
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void machine_irq_enable(void)
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{
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set_csr(mie, MIP_MEIP);
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set_csr(mstatus, MSTATUS_MIE);
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}
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void machine_irq_disable(void)
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{
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clear_csr(mie, MIP_MEIP);
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clear_csr(mstatus, MSTATUS_MIE);
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}
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