/* * Copyright (c) 2008 Pavel Rimsky * Copyright (c) 2017 Jiri Svoboda * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup kernel_sparc64 * @{ */ /** * @file * @brief Niagara input/output buffer shared between kernel and user space */ #ifdef KERNEL #include <mm/as.h> #else #include <as.h> #endif #include <stdint.h> #define OUTPUT_BUFFER_SIZE ((PAGE_SIZE) - 2 * 8) typedef struct { uint64_t read_ptr; uint64_t write_ptr; char data[OUTPUT_BUFFER_SIZE]; } __attribute__((packed)) niagara_output_buffer_t; #define INPUT_BUFFER_SIZE ((PAGE_SIZE) - 2 * 8) typedef struct { uint64_t write_ptr; uint64_t read_ptr; char data[INPUT_BUFFER_SIZE]; } __attribute__((packed)) niagara_input_buffer_t; /** @} */