arch/mips/sgi-ip27/ip27-init.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General
   3  * Public License.  See the file "COPYING" in the main directory of this
   4  * archive for more details.
   5  *
   6  * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
   7  * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
   8  */
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <linux/sched.h>
  12 #include <linux/smp.h>
  13 #include <linux/mm.h>
  14 #include <linux/export.h>
  15 #include <linux/cpumask.h>
  16 #include <asm/cpu.h>
  17 #include <asm/io.h>
  18 #include <asm/pgtable.h>
  19 #include <asm/time.h>
  20 #include <asm/sn/types.h>
  21 #include <asm/sn/sn0/addrs.h>
  22 #include <asm/sn/sn0/hubni.h>
  23 #include <asm/sn/sn0/hubio.h>
  24 #include <asm/sn/klconfig.h>
  25 #include <asm/sn/ioc3.h>
  26 #include <asm/mipsregs.h>
  27 #include <asm/sn/gda.h>
  28 #include <asm/sn/hub.h>
  29 #include <asm/sn/intr.h>
  30 #include <asm/current.h>
  31 #include <asm/processor.h>
  32 #include <asm/mmu_context.h>
  33 #include <asm/thread_info.h>
  34 #include <asm/sn/launch.h>
  35 #include <asm/sn/sn_private.h>
  36 #include <asm/sn/sn0/ip27.h>
  37 #include <asm/sn/mapped_kernel.h>
  38
  39 #define CPU_NONE                (cpuid_t)-1
  40
  41 static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
  42 nasid_t master_nasid = INVALID_NASID;
  43
  44 cnodeid_t       nasid_to_compact_node[MAX_NASIDS];
  45 nasid_t         compact_to_nasid_node[MAX_COMPACT_NODES];
  46 cnodeid_t       cpuid_to_compact_node[MAXCPUS];
  47
  48 EXPORT_SYMBOL(nasid_to_compact_node);
  49
  50 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
  51 EXPORT_SYMBOL_GPL(sn_cpu_info);
  52
  53 extern void pcibr_setup(cnodeid_t);
  54
  55 extern void xtalk_probe_node(cnodeid_t nid);
  56
  57 static void per_hub_init(cnodeid_t cnode)
  58 {
  59         struct hub_data *hub = hub_data(cnode);
  60         nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
  61         int i;
  62
  63         cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
  64
  65         if (test_and_set_bit(cnode, hub_init_mask))
  66                 return;
  67         /*
  68          * Set CRB timeout at 5ms, (< PI timeout of 10ms)
  69          */
  70         REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
  71         REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
  72
  73         hub_rtc_init(cnode);
  74         xtalk_probe_node(cnode);
  75
  76 #ifdef CONFIG_REPLICATE_EXHANDLERS
  77         /*
  78          * If this is not a headless node initialization,
  79          * copy over the caliased exception handlers.
  80          */
  81         if (get_compact_nodeid() == cnode) {
  82                 extern char except_vec2_generic, except_vec3_generic;
  83                 extern void build_tlb_refill_handler(void);
  84
  85                 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
  86                 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
  87                 build_tlb_refill_handler();
  88                 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
  89                 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
  90                 __flush_cache_all();
  91         }
  92 #endif
  93
  94         /*
  95          * Some interrupts are reserved by hardware or by software convention.
  96          * Mark these as reserved right away so they won't be used accidentally
  97          * later.
  98          */
  99         for (i = 0; i <= BASE_PCI_IRQ; i++) {
 100                 __set_bit(i, hub->irq_alloc_mask);
 101                 LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i);
 102         }
 103
 104         __set_bit(IP_PEND0_6_63, hub->irq_alloc_mask);
 105         LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63);
 106
 107         for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) {
 108                 __set_bit(i, hub->irq_alloc_mask);
 109                 LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i);
 110         }
 111 }
 112
 113 void per_cpu_init(void)
 114 {
 115         int cpu = smp_processor_id();
 116         int slice = LOCAL_HUB_L(PI_CPU_NUM);
 117         cnodeid_t cnode = get_compact_nodeid();
 118         struct hub_data *hub = hub_data(cnode);
 119         struct slice_data *si = hub->slice + slice;
 120         int i;
 121
 122         if (test_and_set_bit(slice, &hub->slice_map))
 123                 return;
 124
 125         clear_c0_status(ST0_IM);
 126
 127         per_hub_init(cnode);
 128
 129         for (i = 0; i < LEVELS_PER_SLICE; i++)
 130                 si->level_to_irq[i] = -1;
 131
 132         /*
 133          * We use this so we can find the local hub's data as fast as only
 134          * possible.
 135          */
 136         cpu_data[cpu].data = si;
 137
 138         cpu_time_init();
 139         install_ipi();
 140
 141         /* Install our NMI handler if symmon hasn't installed one. */
 142         install_cpu_nmi_handler(cputoslice(cpu));
 143
 144         set_c0_status(SRB_DEV0 | SRB_DEV1);
 145 }
 146
 147 /*
 148  * get_nasid() returns the physical node id number of the caller.
 149  */
 150 nasid_t
 151 get_nasid(void)
 152 {
 153         return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
 154                          >> NSRI_NODEID_SHFT);
 155 }
 156
 157 /*
 158  * Map the physical node id to a virtual node id (virtual node ids are contiguous).
 159  */
 160 cnodeid_t get_compact_nodeid(void)
 161 {
 162         return NASID_TO_COMPACT_NODEID(get_nasid());
 163 }
 164
 165 static inline void ioc3_eth_init(void)
 166 {
 167         struct ioc3 *ioc3;
 168         nasid_t nid;
 169
 170         nid = get_nasid();
 171         ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
 172
 173         ioc3->eier = 0;
 174 }
 175
 176 extern void ip27_reboot_setup(void);
 177
 178 void __init plat_mem_setup(void)
 179 {
 180         hubreg_t p, e, n_mode;
 181         nasid_t nid;
 182
 183         ip27_reboot_setup();
 184
 185         /*
 186          * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
 187          */
 188         nid = get_nasid();
 189         printk("IP27: Running on node %d.\n", nid);
 190
 191         p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
 192         e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
 193         printk("Node %d has %s primary CPU%s.\n", nid,
 194                p ? "a" : "no",
 195                e ? ", CPU is running" : "");
 196
 197         p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
 198         e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
 199         printk("Node %d has %s secondary CPU%s.\n", nid,
 200                p ? "a" : "no",
 201                e ? ", CPU is running" : "");
 202
 203         /*
 204          * Try to catch kernel missconfigurations and give user an
 205          * indication what option to select.
 206          */
 207         n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
 208         printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
 209 #ifdef CONFIG_SGI_SN_N_MODE
 210         if (!n_mode)
 211                 panic("Kernel compiled for M mode.");
 212 #else
 213         if (n_mode)
 214                 panic("Kernel compiled for N mode.");
 215 #endif
 216
 217         ioc3_eth_init();
 218         per_cpu_init();
 219
 220         set_io_port_base(IO_BASE);
 221 }