bde8eb35ae
This patch fixes UART system call authorization initialization (when protection domain support is enabled) to only initialize the system call entrypoint and authorization data structures once, prior to per-port setup. Previously, if two UARTs were configured, the setup procedure for the second UART would erase the system call authorization for the first (console) UART, resulting in a crash upon the next attempt to perform console output.
46 lines
2 KiB
C
46 lines
2 KiB
C
/*
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* Copyright (C) 2015, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CPU_X86_DRIVERS_LEGACY_PC_UART_16X50_H_
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#define CPU_X86_DRIVERS_LEGACY_PC_UART_16X50_H_
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#include "pci.h"
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typedef pci_driver_t uart_16x50_driver_t;
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void uart_16x50_init(void);
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void uart_16x50_init_port(uart_16x50_driver_t ATTR_KERN_ADDR_SPACE *c_this,
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pci_config_addr_t pci_addr,
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uint16_t dl);
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void uart_16x50_tx(uart_16x50_driver_t c_this, uint8_t c);
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#endif /* CPU_X86_DRIVERS_LEGACY_PC_UART_16X50_H_ */
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