OsdMemory.c revision 128225 
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 128225 2004-04-14 03:39:08Z 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
42MALLOC_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,
58    void **LogicalAddress)
59{
60    *LogicalAddress = pmap_mapdev((vm_offset_t)PhysicalAddress, Length);
61    if (*LogicalAddress == NULL)
62	return (AE_BAD_ADDRESS);
63    return (AE_OK);
64}
65
66void
67AcpiOsUnmapMemory(void *LogicalAddress, ACPI_SIZE Length)
68{
69    pmap_unmapdev((vm_offset_t)LogicalAddress, Length);
70}
71
72ACPI_STATUS
73AcpiOsGetPhysicalAddress(void *LogicalAddress,
74    ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
75{
76    /* We can't necessarily do this, so cop out. */
77    return (AE_BAD_ADDRESS);
78}
79
80/*
81 * There is no clean way to do this.  We make the charitable assumption
82 * that callers will not pass garbage to us.
83 */
84BOOLEAN
85AcpiOsReadable (void *Pointer, ACPI_SIZE Length)
86{
87    return (TRUE);
88}
89
90BOOLEAN
91AcpiOsWritable (void *Pointer, ACPI_SIZE Length)
92{
93    return (TRUE);
94}
95
96ACPI_STATUS
97AcpiOsReadMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 *Value, UINT32 Width)
98{
99    void	*LogicalAddress;
100
101    if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK)
102	return (AE_NOT_EXIST);
103
104    switch (Width) {
105    case 8:
106	*(u_int8_t *)Value = (*(volatile u_int8_t *)LogicalAddress);
107	break;
108    case 16:
109	*(u_int16_t *)Value = (*(volatile u_int16_t *)LogicalAddress);
110	break;
111    case 32:
112	*(u_int32_t *)Value = (*(volatile u_int32_t *)LogicalAddress);
113	break;
114    case 64:
115	*(u_int64_t *)Value = (*(volatile u_int64_t *)LogicalAddress);
116	break;
117    default:
118	/* debug trap goes here */
119	break;
120    }
121
122    AcpiOsUnmapMemory(LogicalAddress, Width / 8);
123
124    return (AE_OK);
125}
126
127ACPI_STATUS
128AcpiOsWriteMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 Value, UINT32 Width)
129{
130    void	*LogicalAddress;
131
132    if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK)
133	return (AE_NOT_EXIST);
134
135    switch (Width) {
136    case 8:
137	(*(volatile u_int8_t *)LogicalAddress) = Value & 0xff;
138	break;
139    case 16:
140	(*(volatile u_int16_t *)LogicalAddress) = Value & 0xffff;
141	break;
142    case 32:
143	(*(volatile u_int32_t *)LogicalAddress) = Value & 0xffffffff;
144	break;
145    case 64:
146	(*(volatile u_int64_t *)LogicalAddress) = Value;
147	break;
148    default:
149	/* debug trap goes here */
150	break;
151    }
152
153    AcpiOsUnmapMemory(LogicalAddress, Width / 8);
154
155    return (AE_OK);
156}
157