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https://github.com/handsomezhuzhu/2025-yatcpu.git
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33 lines
1.6 KiB
C
33 lines
1.6 KiB
C
// Copyright 2021 Howard Lau
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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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#define VRAM_BASE 0x20000000
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#define VRAM ((volatile unsigned char *) VRAM_BASE)
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#define TIMER_BASE 0x80000000
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#define TIMER_LIMIT ((volatile unsigned int *) (TIMER_BASE + 4))
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#define TIMER_ENABLED ((volatile unsigned int *) (TIMER_BASE + 8))
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#define UART_BASE 0x40000000
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#define UART_BAUDRATE ((volatile unsigned int *) (UART_BASE + 4))
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#define UART_RECV ((volatile unsigned int *) (UART_BASE + 12))
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#define UART_SEND ((volatile unsigned int *) (UART_BASE + 16))
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//remap the mmio to reduce memory usage of page table
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#define VA_VRAM_BASE 0x00100000
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#define VA_VRAM ((volatile unsigned char *) VA_VRAM_BASE)
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#define VA_TIMER_BASE 0x00200000
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#define VA_TIMER_LIMIT ((volatile unsigned int *) (VA_TIMER_BASE + 4))
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#define VA_TIMER_ENABLED ((volatile unsigned int *) (VA_TIMER_BASE + 8))
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#define VA_UART_BASE 0x00300000
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#define VA_UART_BAUDRATE ((volatile unsigned int *) (VA_UART_BASE + 4))
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#define VA_UART_RECV ((volatile unsigned int *) (VA_UART_BASE + 12))
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#define VA_UART_SEND ((volatile unsigned int *) (VA_UART_BASE + 16)) |