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authorDavid S. Miller <davem@sunset.davemloft.net>2007-05-25 18:49:59 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-05-29 05:49:41 -0400
commit5cbc30737398b49f62ae8603129ce43ac7db1a41 (patch)
tree45d01a686865e6fd9c32b670f77af1e37db03008 /arch/sparc64/kernel/devices.c
parente01c0d6d8cf29c1c11725837b265598cab687952 (diff)
[SPARC64]: Use machine description and OBP properly for cpu probing.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/devices.c')
-rw-r--r--arch/sparc64/kernel/devices.c196
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/sparc64/kernel/devices.c b/arch/sparc64/kernel/devices.c
deleted file mode 100644
index 0e03c8e218cd..000000000000
--- a/arch/sparc64/kernel/devices.c
+++ /dev/null
@@ -1,196 +0,0 @@
1/* devices.c: Initial scan of the prom device tree for important
2 * Sparc device nodes which we need to find.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#include <linux/kernel.h>
8#include <linux/threads.h>
9#include <linux/init.h>
10#include <linux/ioport.h>
11#include <linux/string.h>
12#include <linux/spinlock.h>
13#include <linux/errno.h>
14#include <linux/bootmem.h>
15
16#include <asm/page.h>
17#include <asm/oplib.h>
18#include <asm/system.h>
19#include <asm/smp.h>
20#include <asm/spitfire.h>
21#include <asm/timer.h>
22#include <asm/cpudata.h>
23
24/* Used to synchronize accesses to NatSemi SUPER I/O chip configure
25 * operations in asm/ns87303.h
26 */
27DEFINE_SPINLOCK(ns87303_lock);
28
29extern void cpu_probe(void);
30extern void central_probe(void);
31
32static const char *cpu_mid_prop(void)
33{
34 if (tlb_type == spitfire)
35 return "upa-portid";
36 return "portid";
37}
38
39static int get_cpu_mid(struct device_node *dp)
40{
41 struct property *prop;
42
43 if (tlb_type == hypervisor) {
44 struct linux_prom64_registers *reg;
45 int len;
46
47 prop = of_find_property(dp, "cpuid", &len);
48 if (prop && len == 4)
49 return *(int *) prop->value;
50
51 prop = of_find_property(dp, "reg", NULL);
52 reg = prop->value;
53 return (reg[0].phys_addr >> 32) & 0x0fffffffUL;
54 } else {
55 const char *prop_name = cpu_mid_prop();
56
57 prop = of_find_property(dp, prop_name, NULL);
58 if (prop)
59 return *(int *) prop->value;
60 return 0;
61 }
62}
63
64static int check_cpu_node(struct device_node *dp, int *cur_inst,
65 int (*compare)(struct device_node *, int, void *),
66 void *compare_arg,
67 struct device_node **dev_node, int *mid)
68{
69 if (!compare(dp, *cur_inst, compare_arg)) {
70 if (dev_node)
71 *dev_node = dp;
72 if (mid)
73 *mid = get_cpu_mid(dp);
74 return 0;
75 }
76
77 (*cur_inst)++;
78
79 return -ENODEV;
80}
81
82static int __cpu_find_by(int (*compare)(struct device_node *, int, void *),
83 void *compare_arg,
84 struct device_node **dev_node, int *mid)
85{
86 struct device_node *dp;
87 int cur_inst;
88
89 cur_inst = 0;
90 for_each_node_by_type(dp, "cpu") {
91 int err = check_cpu_node(dp, &cur_inst,
92 compare, compare_arg,
93 dev_node, mid);
94 if (err == 0)
95 return 0;
96 }
97
98 return -ENODEV;
99}
100
101static int cpu_instance_compare(struct device_node *dp, int instance, void *_arg)
102{
103 int desired_instance = (int) (long) _arg;
104
105 if (instance == desired_instance)
106 return 0;
107 return -ENODEV;
108}
109
110int cpu_find_by_instance(int instance, struct device_node **dev_node, int *mid)
111{
112 return __cpu_find_by(cpu_instance_compare, (void *)(long)instance,
113 dev_node, mid);
114}
115
116static int cpu_mid_compare(struct device_node *dp, int instance, void *_arg)
117{
118 int desired_mid = (int) (long) _arg;
119 int this_mid;
120
121 this_mid = get_cpu_mid(dp);
122 if (this_mid == desired_mid)
123 return 0;
124 return -ENODEV;
125}
126
127int cpu_find_by_mid(int mid, struct device_node **dev_node)
128{
129 return __cpu_find_by(cpu_mid_compare, (void *)(long)mid,
130 dev_node, NULL);
131}
132
133void __init device_scan(void)
134{
135 /* FIX ME FAST... -DaveM */
136 ioport_resource.end = 0xffffffffffffffffUL;
137
138 prom_printf("Booting Linux...\n");
139
140#ifndef CONFIG_SMP
141 {
142 struct device_node *dp;
143 int err, def;
144
145 err = cpu_find_by_instance(0, &dp, NULL);
146 if (err) {
147 prom_printf("No cpu nodes, cannot continue\n");
148 prom_halt();
149 }
150 cpu_data(0).clock_tick =
151 of_getintprop_default(dp, "clock-frequency", 0);
152
153 def = ((tlb_type == hypervisor) ?
154 (8 * 1024) :
155 (16 * 1024));
156 cpu_data(0).dcache_size = of_getintprop_default(dp,
157 "dcache-size",
158 def);
159
160 def = 32;
161 cpu_data(0).dcache_line_size =
162 of_getintprop_default(dp, "dcache-line-size", def);
163
164 def = 16 * 1024;
165 cpu_data(0).icache_size = of_getintprop_default(dp,
166 "icache-size",
167 def);
168
169 def = 32;
170 cpu_data(0).icache_line_size =
171 of_getintprop_default(dp, "icache-line-size", def);
172
173 def = ((tlb_type == hypervisor) ?
174 (3 * 1024 * 1024) :
175 (4 * 1024 * 1024));
176 cpu_data(0).ecache_size = of_getintprop_default(dp,
177 "ecache-size",
178 def);
179
180 def = 64;
181 cpu_data(0).ecache_line_size =
182 of_getintprop_default(dp, "ecache-line-size", def);
183 printk("CPU[0]: Caches "
184 "D[sz(%d):line_sz(%d)] "
185 "I[sz(%d):line_sz(%d)] "
186 "E[sz(%d):line_sz(%d)]\n",
187 cpu_data(0).dcache_size, cpu_data(0).dcache_line_size,
188 cpu_data(0).icache_size, cpu_data(0).icache_line_size,
189 cpu_data(0).ecache_size, cpu_data(0).ecache_line_size);
190 }
191#endif
192
193 central_probe();
194
195 cpu_probe();
196}
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