xnu-1228.3.13.tar.gz

[apple/xnu.git] / osfmk / ppc / io_map.c

diff --git a/osfmk/ppc/io_map.c b/osfmk/ppc/io_map.c
index 5ce5ab5e8ea1e485db1a7f3ed0065069537aab54..25607c1ccd4777719e8ca2eb0fa00d0dcc26de5d 100644 (file)
--- a/osfmk/ppc/io_map.c
+++ b/osfmk/ppc/io_map.c
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *

- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * 

- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.

  * 
  * 

- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER

  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.

  * 
  * 

- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*
  * @OSF_COPYRIGHT@
  */
 /*
  * @OSF_COPYRIGHT@


@@ -42,54 +48,84 @@ extern vm_offset_t  virtual_avail;
  * outside the usual physical memory. If phys_addr is NULL then
  * steal the appropriate number of physical pages from the vm
  * system and map them.
  * outside the usual physical memory. If phys_addr is NULL then
  * steal the appropriate number of physical pages from the vm
  * system and map them.

+ *
+ * Note, this will onl

  */
 vm_offset_t
  */
 vm_offset_t

-io_map(phys_addr, size)
-       vm_offset_t     phys_addr;
-       vm_size_t       size;
+io_map(vm_offset_t phys_addr, vm_size_t size, unsigned int flags)

 {
        vm_offset_t     start;
 {
        vm_offset_t     start;

-       int             i;
-       unsigned int j;
+       vm_size_t       i;
+       unsigned int    mflags;

        vm_page_t       m;
 
        vm_page_t       m;
 

+       mflags = mmFlgBlock | mmFlgUseAttr | (flags & VM_MEM_GUARDED) | ((flags & VM_MEM_NOT_CACHEABLE) >> 1);  /* Convert to our mapping_make flags */

 
 #if DEBUG
        assert (kernel_map != VM_MAP_NULL);                     /* VM must be initialised */
 #endif
 
 
 #if DEBUG
        assert (kernel_map != VM_MAP_NULL);                     /* VM must be initialised */
 #endif
 

-       if (phys_addr != 0) {
-               /* make sure we map full contents of all the pages concerned */
-               size = round_page(size + (phys_addr & PAGE_MASK));
+       if (phys_addr != 0) {                                           /* If they supplied a physical address, use it */

 
 

-               /* Steal some free virtual addresses */
+               size = round_page(size + (phys_addr & PAGE_MASK));      /* Make sure we map all of it */

 
 

-               (void) kmem_alloc_pageable(kernel_map, &start, size);
+               (void) kmem_alloc_pageable(kernel_map, &start, size);   /* Get some virtual addresses to use */

                
                

-               pmap_map_block(kernel_pmap, start, phys_addr, size, 
-                  VM_PROT_READ|VM_PROT_WRITE, PTE_WIMG_IO, 0); /* Set up a block mapped area */
+               (void)mapping_make(kernel_pmap, (addr64_t)start, (ppnum_t)(phys_addr >> 12), 
+                       mflags,                                 /* Map with requested cache mode */
+                       (size >> 12), VM_PROT_READ|VM_PROT_WRITE);

 
 

-               return (start + (phys_addr & PAGE_MASK));
+               return (start + (phys_addr & PAGE_MASK));       /* Pass back the physical address */

        
        } else {
        
        
        } else {
        

-               /* Steal some free virtual addresses */
-               (void) kmem_alloc_pageable(kernel_map, &start, size);
+               (void) kmem_alloc_pageable(kernel_map, &start, size);   /* Get some virtual addresses */

 
                mapping_prealloc(size);                                 /* Make sure there are enough free mappings */
 
                mapping_prealloc(size);                                 /* Make sure there are enough free mappings */

-               /* Steal some physical pages and map them one by one */
+

                for (i = 0; i < size ; i += PAGE_SIZE) {
                        m = VM_PAGE_NULL;
                for (i = 0; i < size ; i += PAGE_SIZE) {
                        m = VM_PAGE_NULL;

-                       while ((m = vm_page_grab()) == VM_PAGE_NULL)
-                               VM_PAGE_WAIT();
+                       while ((m = vm_page_grab()) == VM_PAGE_NULL) {  /* Get a physical page */
+                               VM_PAGE_WAIT();                                 /* Wait if we didn't have one */
+                       }

                        vm_page_gobble(m);
                        vm_page_gobble(m);

-                       (void) pmap_map_bd(start + i,
-                                          m->phys_addr,
-                                          m->phys_addr + PAGE_SIZE,
-                                          VM_PROT_READ|VM_PROT_WRITE);
+                       
+                       (void)mapping_make(kernel_pmap, 
+                               (addr64_t)(start + i), m->phys_page, 
+                               mflags,                                 /* Map with requested cache mode */
+                               1, VM_PROT_READ|VM_PROT_WRITE); 
+                       

                }
 
                mapping_relpre();                                               /* Allow mapping release */
                return start;
        }
 }
                }
 
                mapping_relpre();                                               /* Allow mapping release */
                return start;
        }
 }

+
+
+/*
+ * Allocate and map memory for devices before the VM system comes alive.
+ */
+
+vm_offset_t io_map_spec(vm_offset_t phys_addr, vm_size_t size, unsigned int flags)
+{
+       vm_offset_t     start;
+       unsigned int    mflags;
+
+       if(kernel_map != VM_MAP_NULL) {                         /* If VM system is up, redirect to normal routine */
+               
+               return io_map(phys_addr, size, flags);                  /* Map the address */
+       
+       }
+
+       mflags = mmFlgBlock | mmFlgUseAttr | (flags & VM_MEM_GUARDED) | ((flags & VM_MEM_NOT_CACHEABLE) >> 1);  /* Convert to our mapping_make flags */
+       
+       size = round_page(size + (phys_addr - (phys_addr & -PAGE_SIZE)));       /* Extend the length to include it all */
+       start = pmap_boot_map(size);                            /* Get me some virtual address */
+
+       (void)mapping_make(kernel_pmap, (addr64_t)start, (ppnum_t)(phys_addr >> 12), 
+               mflags,                                 /* Map with requested cache mode */
+               (size >> 12), VM_PROT_READ|VM_PROT_WRITE);
+
+       return (start + (phys_addr & PAGE_MASK));
+}