OsdMemory.c revision 148318 
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
29/*
30 * 6.2 : Memory Management
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/dev/acpica/Osd/OsdMemory.c 148318 2005-07-22 23:10:02Z njl $");
35
36#include "acpi.h"
37
38#include <sys/kernel.h>
39#include <sys/malloc.h>
40#include <vm/vm.h>
41#include <vm/pmap.h>
42
43MALLOC_DEFINE(M_ACPICA, "acpica", "ACPI CA memory pool");
44
45void *
46AcpiOsAllocate(ACPI_SIZE Size)
47{
48    return (malloc(Size, M_ACPICA, M_NOWAIT));
49}
50
51void
52AcpiOsFree(void *Memory)
53{
54    free(Memory, M_ACPICA);
55}
56
57ACPI_STATUS
58AcpiOsMapMemory(ACPI_PHYSICAL_ADDRESS PhysicalAddress, ACPI_SIZE Length,
59    void **LogicalAddress)
60{
61    *LogicalAddress = pmap_mapdev((vm_offset_t)PhysicalAddress, Length);
62    if (*LogicalAddress == NULL)
63	return (AE_BAD_ADDRESS);
64    return (AE_OK);
65}
66
67void
68AcpiOsUnmapMemory(void *LogicalAddress, ACPI_SIZE Length)
69{
70    pmap_unmapdev((vm_offset_t)LogicalAddress, Length);
71}
72
73ACPI_STATUS
74AcpiOsGetPhysicalAddress(void *LogicalAddress,
75    ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
76{
77    /* We can't necessarily do this, so cop out. */
78    return (AE_BAD_ADDRESS);
79}
80
81/*
82 * There is no clean way to do this.  We make the charitable assumption
83 * that callers will not pass garbage to us.
84 */
85BOOLEAN
86AcpiOsReadable (void *Pointer, ACPI_SIZE Length)
87{
88    return (TRUE);
89}
90
91BOOLEAN
92AcpiOsWritable (void *Pointer, ACPI_SIZE Length)
93{
94    return (TRUE);
95}
96
97ACPI_STATUS
98AcpiOsReadMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 *Value, UINT32 Width)
99{
100    void	*LogicalAddress;
101
102    if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK)
103	return (AE_NOT_EXIST);
104
105    switch (Width) {
106    case 8:
107	*(u_int8_t *)Value = (*(volatile u_int8_t *)LogicalAddress);
108	break;
109    case 16:
110	*(u_int16_t *)Value = (*(volatile u_int16_t *)LogicalAddress);
111	break;
112    case 32:
113	*(u_int32_t *)Value = (*(volatile u_int32_t *)LogicalAddress);
114	break;
115    case 64:
116	*(u_int64_t *)Value = (*(volatile u_int64_t *)LogicalAddress);
117	break;
118    default:
119	/* debug trap goes here */
120	break;
121    }
122
123    AcpiOsUnmapMemory(LogicalAddress, Width / 8);
124
125    return (AE_OK);
126}
127
128ACPI_STATUS
129AcpiOsWriteMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 Value, UINT32 Width)
130{
131    void	*LogicalAddress;
132
133    if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK)
134	return (AE_NOT_EXIST);
135
136    switch (Width) {
137    case 8:
138	(*(volatile u_int8_t *)LogicalAddress) = Value & 0xff;
139	break;
140    case 16:
141	(*(volatile u_int16_t *)LogicalAddress) = Value & 0xffff;
142	break;
143    case 32:
144	(*(volatile u_int32_t *)LogicalAddress) = Value & 0xffffffff;
145	break;
146    case 64:
147	(*(volatile u_int64_t *)LogicalAddress) = Value;
148	break;
149    default:
150	/* debug trap goes here */
151	break;
152    }
153
154    AcpiOsUnmapMemory(LogicalAddress, Width / 8);
155
156    return (AE_OK);
157}
158