OsdMemory.c revision 117530 
1/*-
2 * Copyright (c) 2000 Mitsaru Iwasaki
3 * Copyright (c) 2000 Michael Smith
4 * Copyright (c) 2000 BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 *	$FreeBSD: head/sys/dev/acpica/Osd/OsdMemory.c 117530 2003-07-13 22:57:16Z njl $
29 */
30
31/*
32 * 6.2 : Memory Management
33 */
34
35#include "acpi.h"
36
37#include <sys/kernel.h>
38#include <sys/malloc.h>
39#include <vm/vm.h>
40#include <vm/pmap.h>
41
42static MALLOC_DEFINE(M_ACPICA, "acpica", "ACPI CA memory pool");
43
44void *
45AcpiOsAllocate(ACPI_SIZE Size)
46{
47    return(malloc(Size, M_ACPICA, M_NOWAIT));
48}
49
50void
51AcpiOsFree (void *Memory)
52{
53    free(Memory, M_ACPICA);
54}
55
56ACPI_STATUS
57AcpiOsMapMemory (ACPI_PHYSICAL_ADDRESS PhysicalAddress, ACPI_SIZE Length, void **LogicalAddress)
58{
59    *LogicalAddress = pmap_mapdev((vm_offset_t)PhysicalAddress, Length);
60    if (*LogicalAddress == NULL)
61	return(AE_BAD_ADDRESS);
62    return(AE_OK);
63}
64
65void
66AcpiOsUnmapMemory (void *LogicalAddress, ACPI_SIZE Length)
67{
68    pmap_unmapdev((vm_offset_t)LogicalAddress, Length);
69}
70
71ACPI_STATUS
72AcpiOsGetPhysicalAddress(void *LogicalAddress, ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
73{
74    /* we can't necessarily do this, so cop out */
75    return(AE_BAD_ADDRESS);
76}
77
78/*
79 * There is no clean way to do this.  We make the charitable assumption
80 * that callers will not pass garbage to us.
81 */
82BOOLEAN
83AcpiOsReadable (void *Pointer, UINT32 Length)
84{
85    return(TRUE);
86}
87
88BOOLEAN
89AcpiOsWritable (void *Pointer, UINT32 Length)
90{
91    return(TRUE);
92}
93
94ACPI_STATUS
95AcpiOsReadMemory (
96    ACPI_PHYSICAL_ADDRESS	Address,
97    UINT32			*Value,
98    UINT32			Width)
99{
100    void	*LogicalAddress;
101
102    if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK) {
103	return(AE_NOT_EXIST);
104    }
105
106    switch (Width) {
107    case 8:
108	*(u_int8_t *)Value = (*(volatile u_int8_t *)LogicalAddress);
109	break;
110    case 16:
111	*(u_int16_t *)Value = (*(volatile u_int16_t *)LogicalAddress);
112	break;
113    case 32:
114	*(u_int32_t *)Value = (*(volatile u_int32_t *)LogicalAddress);
115	break;
116    case 64:
117	*(u_int64_t *)Value = (*(volatile u_int64_t *)LogicalAddress);
118	break;
119    default:
120	/* debug trap goes here */
121	break;
122    }
123
124    AcpiOsUnmapMemory(LogicalAddress, Width / 8);
125
126    return(AE_OK);
127}
128
129ACPI_STATUS
130AcpiOsWriteMemory (
131    ACPI_PHYSICAL_ADDRESS	Address,
132    UINT32			Value,
133    UINT32			Width)
134{
135    void	*LogicalAddress;
136
137    if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK) {
138	return(AE_NOT_EXIST);
139    }
140
141    switch (Width) {
142    case 8:
143	(*(volatile u_int8_t *)LogicalAddress) = Value & 0xff;
144	break;
145    case 16:
146	(*(volatile u_int16_t *)LogicalAddress) = Value & 0xffff;
147	break;
148    case 32:
149	(*(volatile u_int32_t *)LogicalAddress) = Value & 0xffffffff;
150	break;
151    case 64:
152	(*(volatile u_int64_t *)LogicalAddress) = Value;
153	break;
154    default:
155	/* debug trap goes here */
156	break;
157    }
158
159    AcpiOsUnmapMemory(LogicalAddress, Width / 8);
160
161    return(AE_OK);
162}
163