WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/ddi/ddi.c

 /*
  * Copyright (C) 2006 Jakub Jermar
  * 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.
  */
 #include <ddi/ddi.h>
 #include <ddi/ddi_arg.h>
 #include <proc/task.h>
 #include <security/cap.h>
 #include <mm/frame.h>
 #include <mm/page.h>
 #include <mm/as.h>
 #include <synch/spinlock.h>
 #include <arch.h>
 #include <align.h>
 #include <errno.h>
 /** Map piece of physical memory into virtual address space of specified task.
+ *
  * @param id Task ID of the destination task.
  * @param pf Physical frame address of the starting frame.
  * @param vp Virtual page address of the starting page.
  * @param pages Number of pages to map.
  * @param writable If true, the mapping will be created writable.
+ *
  * @return 0 on success, EPERM if the caller lacks capabilities to use this syscall,
  *     ENOENT if there is no task matching the specified ID and ENOMEM if
  *     there was a problem in creating address space area.
  */
 static int ddi_map_physmem(task_id_t id, __address pf, __address vp, count_t pages, bool writable)
+{
     ipl_t ipl;
     cap_t caps;
     task_t *t;
     int flags;
     count_t i;
     /*
      * Make sure the caller is authorised to make this syscall.
      */
     caps = cap_get(TASK);
     if (!(caps & CAP_MEM_MANAGER))
         return EPERM;
     ipl = interrupts_disable();
     spinlock_lock(&tasks_lock);
     t = task_find_by_id(id);
     if (!t) {
         /*
          * There is no task with the specified ID.
          */
         spinlock_unlock(&tasks_lock);
         interrupts_restore(ipl);
         return ENOENT;
+    }
     /*
      * TODO: We are currently lacking support for task destroying.
      * Once it is added to the kernel, we must take care to
      * synchronize in a way that prevents race conditions here.
      */
     /* Lock the task and release the lock protecting tasks_btree. */
     spinlock_lock(&t->lock);
     spinlock_unlock(&tasks_lock);
     flags = AS_AREA_DEVICE | AS_AREA_READ;
     if (writable)
         flags |= AS_AREA_WRITE;
     if (!as_area_create(t->as, flags, pages * PAGE_SIZE, vp)) {
         /*
          * The address space area could not have been created.
          * We report it using ENOMEM.
          */
         spinlock_unlock(&t->lock);
         interrupts_restore(ipl);
         return ENOMEM;
+    }
     /* Initialize page tables. */
     for (i = 0; i < pages; i++)
         as_set_mapping(t->as, vp + i * PAGE_SIZE, pf + i * FRAME_SIZE);
     spinlock_unlock(&t->lock);
     interrupts_restore(ipl);
     return 0;
+}
+/** Enable range of I/O space for task.
+ *
+ * @param id Task ID of the destination task.
+ * @param ioaddr Starting I/O address.
+ * @param size Size of the enabled I/O space..
+ *
+ * @return 0 on success, EPERM if the caller lacks capabilities to use this syscall,
+ *     ENOENT if there is no task matching the specified ID.
+ */
+static int ddi_enable_iospace(task_id_t id, __address ioaddr, size_t size)
+{
+    ipl_t ipl;
+    cap_t caps;
+    task_t *t;
+    int rc;
+    /*
+     * Make sure the caller is authorised to make this syscall.
+     */
+    caps = cap_get(TASK);
+    if (!(caps & CAP_IO_MANAGER))
+        return EPERM;
+    ipl = interrupts_disable();
+    spinlock_lock(&tasks_lock);
+    t = task_find_by_id(id);
+    if (!t) {
+        /*
+         * There is no task with the specified ID.
+         */
+        spinlock_unlock(&tasks_lock);
+        interrupts_restore(ipl);
+        return ENOENT;
+    }
+    /*
+     * TODO: We are currently lacking support for task destroying.
+     * Once it is added to the kernel, we must take care to
+     * synchronize in a way that prevents race conditions here.
+     */
+    /* Lock the task and release the lock protecting tasks_btree. */
+    spinlock_lock(&t->lock);
+    spinlock_unlock(&tasks_lock);
+    rc = ddi_enable_iospace_arch(t, ioaddr, size);
+    spinlock_unlock(&t->lock);
+    interrupts_restore(ipl);
+    return rc;
+}
 /** Wrapper for SYS_MAP_PHYSMEM syscall.
+ *
- * @param User space address of DDI argument structure.
+ * @param User space address of memory DDI argument structure.
+ *
  * @return 0 on success, otherwise it returns error code found in errno.h
  */
-__native sys_map_physmem(ddi_arg_t *uspace_ddi_arg)
+__native sys_map_physmem(ddi_memarg_t *uspace_mem_arg)
+{
-    ddi_arg_t arg;
+    ddi_memarg_t arg;
-    copy_from_uspace(&arg, uspace_ddi_arg, sizeof(ddi_arg_t));
+    copy_from_uspace(&arg, uspace_mem_arg, sizeof(ddi_memarg_t));
     return (__native) ddi_map_physmem((task_id_t) arg.task_id, ALIGN_DOWN((__address) arg.phys_base, FRAME_SIZE),
                       ALIGN_DOWN((__address) arg.virt_base, PAGE_SIZE), (count_t) arg.pages,
                       (bool) arg.writable);
+}
+/** Wrapper for SYS_ENABLE_IOSPACE syscall.
+ *
+ * @param User space address of DDI argument structure.
+ *
+ * @return 0 on success, otherwise it returns error code found in errno.h
+ */
+__native sys_enable_iospace(ddi_ioarg_t *uspace_io_arg)
+{
+    ddi_ioarg_t arg;
+    copy_from_uspace(&arg, uspace_io_arg, sizeof(ddi_ioarg_t));
+    return (__native) ddi_enable_iospace((task_id_t) arg.task_id, (__address) arg.ioaddr, (size_t) arg.size);
+}

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/ddi/ddi.c – Rev 1178 → 1191