File: /usr/src/linux/arch/mips64/sgi-ip27/ip27-klconfig.c
1 /*
2 * Copyright (C) 1999, 2000 Ralf Baechle (ralf@gnu.org)
3 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
4 */
5 #include <linux/init.h>
6 #include <linux/kernel.h>
7 #include <linux/sched.h>
8 #include <linux/interrupt.h>
9 #include <linux/kernel_stat.h>
10 #include <linux/param.h>
11 #include <linux/timex.h>
12 #include <linux/mm.h>
13
14 #include <asm/sn/klconfig.h>
15 #include <asm/sn/arch.h>
16 #include <asm/sn/gda.h>
17
18 klinfo_t *find_component(lboard_t *brd, klinfo_t *kli, unsigned char struct_type)
19 {
20 int index, j;
21
22 if (kli == (klinfo_t *)NULL) {
23 index = 0;
24 } else {
25 for (j = 0; j < KLCF_NUM_COMPS(brd); j++)
26 if (kli == KLCF_COMP(brd, j))
27 break;
28 index = j;
29 if (index == KLCF_NUM_COMPS(brd)) {
30 printk("find_component: Bad pointer: 0x%p\n", kli);
31 return (klinfo_t *)NULL;
32 }
33 index++; /* next component */
34 }
35
36 for (; index < KLCF_NUM_COMPS(brd); index++) {
37 kli = KLCF_COMP(brd, index);
38 if (KLCF_COMP_TYPE(kli) == struct_type)
39 return kli;
40 }
41
42 /* Didn't find it. */
43 return (klinfo_t *)NULL;
44 }
45
46 klinfo_t *find_first_component(lboard_t *brd, unsigned char struct_type)
47 {
48 return find_component(brd, (klinfo_t *)NULL, struct_type);
49 }
50
51 lboard_t * find_lboard(lboard_t *start, unsigned char brd_type)
52 {
53 /* Search all boards stored on this node. */
54 while (start) {
55 if (start->brd_type == brd_type)
56 return start;
57 start = KLCF_NEXT(start);
58 }
59 /* Didn't find it. */
60 return (lboard_t *)NULL;
61 }
62
63 lboard_t * find_lboard_class(lboard_t *start, unsigned char brd_type)
64 {
65 /* Search all boards stored on this node. */
66 while (start) {
67 if (KLCLASS(start->brd_type) == KLCLASS(brd_type))
68 return start;
69 start = KLCF_NEXT(start);
70 }
71
72 /* Didn't find it. */
73 return (lboard_t *)NULL;
74 }
75
76 cnodeid_t get_cpu_cnode(cpuid_t cpu)
77 {
78 return CPUID_TO_COMPACT_NODEID(cpu);
79 }
80
81 klcpu_t * nasid_slice_to_cpuinfo(nasid_t nasid, int slice)
82 {
83 lboard_t *brd;
84 klcpu_t *acpu;
85
86 if (!(brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27)))
87 return (klcpu_t *)NULL;
88
89 if (!(acpu = (klcpu_t *)find_first_component(brd, KLSTRUCT_CPU)))
90 return (klcpu_t *)NULL;
91
92 do {
93 if ((acpu->cpu_info.physid) == slice)
94 return acpu;
95 } while ((acpu = (klcpu_t *)find_component(brd, (klinfo_t *)acpu,
96 KLSTRUCT_CPU)));
97 return (klcpu_t *)NULL;
98 }
99
100 klcpu_t * sn_get_cpuinfo(cpuid_t cpu)
101 {
102 nasid_t nasid;
103 int slice;
104 klcpu_t *acpu;
105 gda_t *gdap = GDA;
106 cnodeid_t cnode;
107
108 if (!(cpu < MAXCPUS)) {
109 printk("sn_get_cpuinfo: illegal cpuid 0x%lx\n", cpu);
110 return NULL;
111 }
112
113 cnode = get_cpu_cnode(cpu);
114 if (cnode == INVALID_CNODEID)
115 return NULL;
116
117 if ((nasid = gdap->g_nasidtable[cnode]) == INVALID_NASID)
118 return NULL;
119
120 for (slice = 0; slice < CPUS_PER_NODE; slice++) {
121 acpu = nasid_slice_to_cpuinfo(nasid, slice);
122 if (acpu && acpu->cpu_info.virtid == cpu)
123 return acpu;
124 }
125 return NULL;
126 }
127
128 int get_cpu_slice(cpuid_t cpu)
129 {
130 klcpu_t *acpu;
131
132 if ((acpu = sn_get_cpuinfo(cpu)) == NULL)
133 return -1;
134 return acpu->cpu_info.physid;
135 }
136