1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/*
* memory.c: PROM library functions for acquiring/using memory descriptors
* given to us from the ARCS firmware.
*
* Copyright (C) 1996 by David S. Miller
* Copyright (C) 1999, 2000, 2001 by Ralf Baechle
* Copyright (C) 1999, 2000 by Silicon Graphics, Inc.
*
* PROM library functions for acquiring/using memory descriptors given to us
* from the ARCS firmware. This is only used when CONFIG_ARC_MEMORY is set
* because on some machines like SGI IP27 the ARC memory configuration data
* completly bogus and alternate easier to use mechanisms are available.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/swap.h>
#include <asm/sgialib.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/bootinfo.h>
#undef DEBUG
/*
* For ARC firmware memory functions the unit of meassuring memory is always
* a 4k page of memory
*/
#define ARC_PAGE_SHIFT 12
struct linux_mdesc * __init ArcGetMemoryDescriptor(struct linux_mdesc *Current)
{
return (struct linux_mdesc *) ARC_CALL1(get_mdesc, Current);
}
#ifdef DEBUG /* convenient for debugging */
static char *arcs_mtypes[8] = {
"Exception Block",
"ARCS Romvec Page",
"Free/Contig RAM",
"Generic Free RAM",
"Bad Memory",
"Standalone Program Pages",
"ARCS Temp Storage Area",
"ARCS Permanent Storage Area"
};
static char *arc_mtypes[8] = {
"Exception Block",
"SystemParameterBlock",
"FreeMemory",
"Bad Memory",
"LoadedProgram",
"FirmwareTemporary",
"FirmwarePermanent",
"FreeContiguous"
};
#define mtypes(a) (prom_flags & PROM_FLAG_ARCS) ? arcs_mtypes[a.arcs] \
: arc_mtypes[a.arc]
#endif
static inline int memtype_classify_arcs(union linux_memtypes type)
{
switch (type.arcs) {
case arcs_fcontig:
case arcs_free:
return BOOT_MEM_RAM;
case arcs_atmp:
return BOOT_MEM_ROM_DATA;
case arcs_eblock:
case arcs_rvpage:
case arcs_bmem:
case arcs_prog:
case arcs_aperm:
return BOOT_MEM_RESERVED;
default:
BUG();
}
while(1); /* Nuke warning. */
}
static inline int memtype_classify_arc(union linux_memtypes type)
{
switch (type.arc) {
case arc_free:
case arc_fcontig:
return BOOT_MEM_RAM;
case arc_atmp:
return BOOT_MEM_ROM_DATA;
case arc_eblock:
case arc_rvpage:
case arc_bmem:
case arc_prog:
case arc_aperm:
return BOOT_MEM_RESERVED;
default:
BUG();
}
while(1); /* Nuke warning. */
}
static int __init prom_memtype_classify(union linux_memtypes type)
{
if (prom_flags & PROM_FLAG_ARCS) /* SGI is ``different'' ... */
return memtype_classify_arcs(type);
return memtype_classify_arc(type);
}
void __init prom_meminit(void)
{
struct linux_mdesc *p;
#ifdef DEBUG
int i = 0;
printk("ARCS MEMORY DESCRIPTOR dump:\n");
p = ArcGetMemoryDescriptor(PROM_NULL_MDESC);
while(p) {
printk("[%d,%p]: base<%08lx> pages<%08lx> type<%s>\n",
i, p, p->base, p->pages, mtypes(p->type));
p = ArcGetMemoryDescriptor(p);
i++;
}
#endif
p = PROM_NULL_MDESC;
while ((p = ArcGetMemoryDescriptor(p))) {
unsigned long base, size;
long type;
base = p->base << ARC_PAGE_SHIFT;
size = p->pages << ARC_PAGE_SHIFT;
type = prom_memtype_classify(p->type);
add_memory_region(base, size, type);
}
}
void __init prom_free_prom_memory(void)
{
unsigned long addr;
int i;
if (prom_flags & PROM_FLAG_DONT_FREE_TEMP)
return;
for (i = 0; i < boot_mem_map.nr_map; i++) {
if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
continue;
addr = boot_mem_map.map[i].addr;
free_init_pages("prom memory",
addr, addr + boot_mem_map.map[i].size);
}
}
|
