/* * Copyright (c) 2006 Jakub Jermar * Copyright (c) 2008 Jakub Vana * 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_ia64_ddi * @{ */ /** @file */ #include <ddi/ddi.h> #include <proc/task.h> #include <typedefs.h> #include <stdlib.h> #include <errno.h> #define IO_MEMMAP_PAGES 16384 #define PORTS_PER_PAGE 4 /** Enable I/O space range for task. * * Interrupts are disabled and task is locked. * * @param task Task. * @param ioaddr Starting I/O space address. * @param size Size of the enabled I/O range. * * @return EOK on success or an error code from errno.h. */ errno_t ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size) { if (!task->arch.iomap) { task->arch.iomap = malloc(sizeof(bitmap_t)); if (task->arch.iomap == NULL) return ENOMEM; void *store = malloc(bitmap_size(IO_MEMMAP_PAGES)); if (store == NULL) return ENOMEM; bitmap_initialize(task->arch.iomap, IO_MEMMAP_PAGES, store); bitmap_clear_range(task->arch.iomap, 0, IO_MEMMAP_PAGES); } uintptr_t iopage = ioaddr / PORTS_PER_PAGE; size = ALIGN_UP(size + ioaddr - 4 * iopage, PORTS_PER_PAGE); bitmap_set_range(task->arch.iomap, iopage, size / 4); return EOK; } /** Disable I/O space range for task. * * Interrupts are disabled and task is locked. * * @param task Task. * @param ioaddr Starting I/O space address. * @param size Size of the disabled I/O range. * * @return EOK on success or an error code from errno.h. */ errno_t ddi_iospace_disable_arch(task_t *task, uintptr_t ioaddr, size_t size) { if (!task->arch.iomap) return EINVAL; uintptr_t iopage = ioaddr / PORTS_PER_PAGE; size = ALIGN_UP(size + ioaddr - 4 * iopage, PORTS_PER_PAGE); bitmap_clear_range(task->arch.iomap, iopage, size / 4); return EOK; } /** @} */