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litex/software/include/hw/uart.h

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Copy some software code from the original Milkymist SoC. Libbase should keep its RAM usage to a minimum as it is meant to be executed before the SDRAM is up and running. (Having lots of code is OK though as we XIP from the flash)
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/*
* Milkymist SoC (Software)
software: use new UART
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* Copyright (C) 2007, 2008, 2009, 2010, 2012 Sebastien Bourdeauducq
Copy some software code from the original Milkymist SoC. Libbase should keep its RAM usage to a minimum as it is meant to be executed before the SDRAM is up and running. (Having lots of code is OK though as we XIP from the flash)
2012-02-03 06:08:17 -05:00
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __HW_UART_H
#define __HW_UART_H
#include <hw/common.h>
Common include files
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#include <csrbase.h>
Copy some software code from the original Milkymist SoC. Libbase should keep its RAM usage to a minimum as it is meant to be executed before the SDRAM is up and running. (Having lots of code is OK though as we XIP from the flash)
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Common include files
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#define UART_CSR(x) MMPTR(UART_BASE+(x))
Copy some software code from the original Milkymist SoC. Libbase should keep its RAM usage to a minimum as it is meant to be executed before the SDRAM is up and running. (Having lots of code is OK though as we XIP from the flash)
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Common include files
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#define CSR_UART_RXTX UART_CSR(0x00)
#define CSR_UART_DIVISORH UART_CSR(0x04)
#define CSR_UART_DIVISORL UART_CSR(0x08)
Copy some software code from the original Milkymist SoC. Libbase should keep its RAM usage to a minimum as it is meant to be executed before the SDRAM is up and running. (Having lots of code is OK though as we XIP from the flash)
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Common include files
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#define CSR_UART_EV_STAT UART_CSR(0x0c)
#define CSR_UART_EV_PENDING UART_CSR(0x10)
#define CSR_UART_EV_ENABLE UART_CSR(0x14)
#define UART_EV_TX 0x1
#define UART_EV_RX 0x2
Copy some software code from the original Milkymist SoC. Libbase should keep its RAM usage to a minimum as it is meant to be executed before the SDRAM is up and running. (Having lots of code is OK though as we XIP from the flash)
2012-02-03 06:08:17 -05:00
#endif /* __HW_UART_H */