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Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
e77227eb | 14 | #include <linux/bootmem.h> |
1da177e4 LT |
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 | ||
e5dd42e4 | 24 | /* Used to synchronize accesses to NatSemi SUPER I/O chip configure |
1da177e4 LT |
25 | * operations in asm/ns87303.h |
26 | */ | |
27 | DEFINE_SPINLOCK(ns87303_lock); | |
28 | ||
29 | extern void cpu_probe(void); | |
30 | extern void central_probe(void); | |
31 | ||
4cce4b7c | 32 | static const char *cpu_mid_prop(void) |
1da177e4 LT |
33 | { |
34 | if (tlb_type == spitfire) | |
35 | return "upa-portid"; | |
36 | return "portid"; | |
37 | } | |
38 | ||
07f8e5f3 | 39 | static int get_cpu_mid(struct device_node *dp) |
4cce4b7c | 40 | { |
07f8e5f3 DM |
41 | struct property *prop; |
42 | ||
4cce4b7c | 43 | if (tlb_type == hypervisor) { |
07f8e5f3 DM |
44 | struct linux_prom64_registers *reg; |
45 | int len; | |
4cce4b7c | 46 | |
07f8e5f3 DM |
47 | prop = of_find_property(dp, "cpuid", &len); |
48 | if (prop && len == 4) | |
49 | return *(int *) prop->value; | |
4cce4b7c | 50 | |
07f8e5f3 DM |
51 | prop = of_find_property(dp, "reg", NULL); |
52 | reg = prop->value; | |
53 | return (reg[0].phys_addr >> 32) & 0x0fffffffUL; | |
4cce4b7c DM |
54 | } else { |
55 | const char *prop_name = cpu_mid_prop(); | |
56 | ||
07f8e5f3 DM |
57 | prop = of_find_property(dp, prop_name, NULL); |
58 | if (prop) | |
59 | return *(int *) prop->value; | |
60 | return 0; | |
4cce4b7c DM |
61 | } |
62 | } | |
63 | ||
07f8e5f3 DM |
64 | static 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) | |
1da177e4 | 68 | { |
07f8e5f3 DM |
69 | if (!compare(dp, *cur_inst, compare_arg)) { |
70 | if (dev_node) | |
71 | *dev_node = dp; | |
1da177e4 | 72 | if (mid) |
07f8e5f3 | 73 | *mid = get_cpu_mid(dp); |
1da177e4 LT |
74 | return 0; |
75 | } | |
76 | ||
77 | (*cur_inst)++; | |
78 | ||
79 | return -ENODEV; | |
80 | } | |
81 | ||
07f8e5f3 DM |
82 | static int __cpu_find_by(int (*compare)(struct device_node *, int, void *), |
83 | void *compare_arg, | |
84 | struct device_node **dev_node, int *mid) | |
1da177e4 | 85 | { |
07f8e5f3 DM |
86 | struct device_node *dp; |
87 | int cur_inst; | |
1da177e4 | 88 | |
1da177e4 | 89 | cur_inst = 0; |
07f8e5f3 DM |
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); | |
1da177e4 LT |
94 | if (err == 0) |
95 | return 0; | |
96 | } | |
97 | ||
98 | return -ENODEV; | |
99 | } | |
100 | ||
07f8e5f3 | 101 | static int cpu_instance_compare(struct device_node *dp, int instance, void *_arg) |
1da177e4 LT |
102 | { |
103 | int desired_instance = (int) (long) _arg; | |
104 | ||
105 | if (instance == desired_instance) | |
106 | return 0; | |
107 | return -ENODEV; | |
108 | } | |
109 | ||
07f8e5f3 | 110 | int cpu_find_by_instance(int instance, struct device_node **dev_node, int *mid) |
1da177e4 LT |
111 | { |
112 | return __cpu_find_by(cpu_instance_compare, (void *)(long)instance, | |
07f8e5f3 | 113 | dev_node, mid); |
1da177e4 LT |
114 | } |
115 | ||
07f8e5f3 | 116 | static int cpu_mid_compare(struct device_node *dp, int instance, void *_arg) |
1da177e4 LT |
117 | { |
118 | int desired_mid = (int) (long) _arg; | |
119 | int this_mid; | |
120 | ||
07f8e5f3 | 121 | this_mid = get_cpu_mid(dp); |
1da177e4 LT |
122 | if (this_mid == desired_mid) |
123 | return 0; | |
124 | return -ENODEV; | |
125 | } | |
126 | ||
07f8e5f3 | 127 | int cpu_find_by_mid(int mid, struct device_node **dev_node) |
1da177e4 LT |
128 | { |
129 | return __cpu_find_by(cpu_mid_compare, (void *)(long)mid, | |
07f8e5f3 | 130 | dev_node, NULL); |
1da177e4 LT |
131 | } |
132 | ||
133 | void __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 | { | |
07f8e5f3 DM |
142 | struct device_node *dp; |
143 | int err, def; | |
f03b8a54 | 144 | |
07f8e5f3 | 145 | err = cpu_find_by_instance(0, &dp, NULL); |
1da177e4 LT |
146 | if (err) { |
147 | prom_printf("No cpu nodes, cannot continue\n"); | |
148 | prom_halt(); | |
149 | } | |
07f8e5f3 DM |
150 | cpu_data(0).clock_tick = |
151 | of_getintprop_default(dp, "clock-frequency", 0); | |
f03b8a54 DM |
152 | |
153 | def = ((tlb_type == hypervisor) ? | |
154 | (8 * 1024) : | |
155 | (16 * 1024)); | |
07f8e5f3 DM |
156 | cpu_data(0).dcache_size = of_getintprop_default(dp, |
157 | "dcache-size", | |
158 | def); | |
f03b8a54 DM |
159 | |
160 | def = 32; | |
80dc0d6b | 161 | cpu_data(0).dcache_line_size = |
07f8e5f3 | 162 | of_getintprop_default(dp, "dcache-line-size", def); |
f03b8a54 DM |
163 | |
164 | def = 16 * 1024; | |
07f8e5f3 DM |
165 | cpu_data(0).icache_size = of_getintprop_default(dp, |
166 | "icache-size", | |
167 | def); | |
f03b8a54 DM |
168 | |
169 | def = 32; | |
80dc0d6b | 170 | cpu_data(0).icache_line_size = |
07f8e5f3 | 171 | of_getintprop_default(dp, "icache-line-size", def); |
f03b8a54 DM |
172 | |
173 | def = ((tlb_type == hypervisor) ? | |
174 | (3 * 1024 * 1024) : | |
175 | (4 * 1024 * 1024)); | |
07f8e5f3 DM |
176 | cpu_data(0).ecache_size = of_getintprop_default(dp, |
177 | "ecache-size", | |
178 | def); | |
f03b8a54 DM |
179 | |
180 | def = 64; | |
80dc0d6b | 181 | cpu_data(0).ecache_line_size = |
07f8e5f3 | 182 | of_getintprop_default(dp, "ecache-line-size", def); |
80dc0d6b DM |
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); | |
1da177e4 LT |
190 | } |
191 | #endif | |
192 | ||
193 | central_probe(); | |
194 | ||
195 | cpu_probe(); | |
196 | } |