1 /* *********************************************************************
2 * Broadcom Common Firmware Environment (CFE)
4 * Physical memory peek/poke routines File: lib_physio.S
6 * Little stub routines to allow access to arbitrary physical
7 * addresses. In most cases this should not be needed, as
8 * many physical addresses are within kseg1, but this handles
9 * the cases that are not automagically, so we don't need
10 * to mess up the code with icky macros and such.
14 *********************************************************************
16 * Copyright 2000,2001,2002,2003
17 * Broadcom Corporation. All rights reserved.
19 * This software is furnished under license and may be used and
20 * copied only in accordance with the following terms and
21 * conditions. Subject to these conditions, you may download,
22 * copy, install, use, modify and distribute modified or unmodified
23 * copies of this software in source and/or binary form. No title
24 * or ownership is transferred hereby.
26 * 1) Any source code used, modified or distributed must reproduce
27 * and retain this copyright notice and list of conditions
28 * as they appear in the source file.
30 * 2) No right is granted to use any trade name, trademark, or
31 * logo of Broadcom Corporation. The "Broadcom Corporation"
32 * name may not be used to endorse or promote products derived
33 * from this software without the prior written permission of
34 * Broadcom Corporation.
36 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
37 * IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
38 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
39 * PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
40 * SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
41 * PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
42 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
43 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
44 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
45 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
46 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
47 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
48 * THE POSSIBILITY OF SUCH DAMAGE.
49 ********************************************************************* */
53 #include <armmacros.h>
56 /* *********************************************************************
59 * Macro to construct code for doing the physical I/O
60 * We try to avoid messing with KX or doing 64-bit stuff
63 * r0: addr / return value
68 ********************************************************************* */
70 /* *********************************************************************
71 * phys_read8 - read 8-bit bytes
72 ********************************************************************* */
80 /* *********************************************************************
81 * phys_read16 - read 16-bit shorts
82 ********************************************************************* */
90 /* *********************************************************************
91 * phys_read32 - read 32-bit ints
92 ********************************************************************* */
100 /* *********************************************************************
101 * phys_read64 - read 64-bit longs
102 ********************************************************************* */
110 /* *********************************************************************
111 * phys_write8 - write 8-bit bytes
112 ********************************************************************* */
115 /* r0: addr, r1: value */
120 /* *********************************************************************
121 * phys_write16 - write 16-bit shorts
122 ********************************************************************* */
125 /* r0: addr, r1: value */
130 /* *********************************************************************
131 * phys_write32 - write 32-bit longs
132 ********************************************************************* */
135 /* r0: addr, r1: value */
140 /* *********************************************************************
141 * phys_write64 - write 64-bit longs
142 ********************************************************************* */
144 /* r0: addr, r1: value */
150 /* *********************************************************************
152 ********************************************************************* */