root/arch/mips/sgi-ip27/ip27-klconfig.c

DEFINITIONS

1. find_component
2. find_first_component
3. find_lboard
4. find_lboard_class
5. get_cpu_cnode
6. nasid_slice_to_cpuinfo
7. sn_get_cpuinfo
8. get_cpu_slice

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 1999, 2000 Ralf Baechle (ralf@gnu.org)
   4  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
   5  */
   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 }