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/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/cpumask.h>
  15 #include <asm/cpu.h>
  16 #include <asm/io.h>
  17 #include <asm/pgtable.h>
  18 #include <asm/time.h>
  19 #include <asm/sn/types.h>
  20 #include <asm/sn/sn0/addrs.h>
  21 #include <asm/sn/sn0/hubni.h>
  22 #include <asm/sn/sn0/hubio.h>
  23 #include <asm/sn/klconfig.h>
  24 #include <asm/sn/ioc3.h>
  25 #include <asm/mipsregs.h>
  26 #include <asm/sn/gda.h>
  27 #include <asm/sn/hub.h>
  28 #include <asm/sn/intr.h>
  29 #include <asm/current.h>
  30 #include <asm/processor.h>
  31 #include <asm/mmu_context.h>
  32 #include <asm/thread_info.h>
  33 #include <asm/sn/launch.h>
  34 #include <asm/sn/sn_private.h>
  35 #include <asm/sn/sn0/ip27.h>
  36 #include <asm/sn/mapped_kernel.h>
  37
  38 #define CPU_NONE                (cpuid_t)-1
  39
  40 static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
  41 nasid_t master_nasid = INVALID_NASID;
  42
  43 cnodeid_t       nasid_to_compact_node[MAX_NASIDS];
  44 nasid_t         compact_to_nasid_node[MAX_COMPACT_NODES];
  45 cnodeid_t       cpuid_to_compact_node[MAXCPUS];
  46
  47 EXPORT_SYMBOL(nasid_to_compact_node);
  48
  49 struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
  50 EXPORT_SYMBOL_GPL(sn_cpu_info);
  51
  52 extern void pcibr_setup(cnodeid_t);
  53
  54 extern void xtalk_probe_node(cnodeid_t nid);
  55
  56 <<<<<<< HEAD:arch/mips/sgi-ip27/ip27-init.c
  57 static void __init per_hub_init(cnodeid_t cnode)
  58 =======
  59 static void __cpuinit per_hub_init(cnodeid_t cnode)
  60 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/mips/sgi-ip27/ip27-init.c
  61 {
  62         struct hub_data *hub = hub_data(cnode);
  63         nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
  64         int i;
  65
  66         cpu_set(smp_processor_id(), hub->h_cpus);
  67
  68         if (test_and_set_bit(cnode, hub_init_mask))
  69                 return;
  70         /*
  71          * Set CRB timeout at 5ms, (< PI timeout of 10ms)
  72          */
  73         REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
  74         REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
  75
  76         hub_rtc_init(cnode);
  77         xtalk_probe_node(cnode);
  78
  79 #ifdef CONFIG_REPLICATE_EXHANDLERS
  80         /*
  81          * If this is not a headless node initialization,
  82          * copy over the caliased exception handlers.
  83          */
  84         if (get_compact_nodeid() == cnode) {
  85                 extern char except_vec2_generic, except_vec3_generic;
  86                 extern void build_tlb_refill_handler(void);
  87
  88                 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
  89                 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
  90                 build_tlb_refill_handler();
  91                 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
  92                 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
  93                 __flush_cache_all();
  94         }
  95 #endif
  96
  97         /*
  98          * Some interrupts are reserved by hardware or by software convention.
  99          * Mark these as reserved right away so they won't be used accidently
 100          * later.
 101          */
 102         for (i = 0; i <= BASE_PCI_IRQ; i++) {
 103                 __set_bit(i, hub->irq_alloc_mask);
 104                 LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i);
 105         }
 106
 107         __set_bit(IP_PEND0_6_63, hub->irq_alloc_mask);
 108         LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63);
 109
 110         for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) {
 111                 __set_bit(i, hub->irq_alloc_mask);
 112                 LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i);
 113         }
 114 }
 115
 116 void __cpuinit per_cpu_init(void)
 117 {
 118         int cpu = smp_processor_id();
 119         int slice = LOCAL_HUB_L(PI_CPU_NUM);
 120         cnodeid_t cnode = get_compact_nodeid();
 121         struct hub_data *hub = hub_data(cnode);
 122         struct slice_data *si = hub->slice + slice;
 123         int i;
 124
 125         if (test_and_set_bit(slice, &hub->slice_map))
 126                 return;
 127
 128         clear_c0_status(ST0_IM);
 129
 130         per_hub_init(cnode);
 131
 132         for (i = 0; i < LEVELS_PER_SLICE; i++)
 133                 si->level_to_irq[i] = -1;
 134
 135         /*
 136          * We use this so we can find the local hub's data as fast as only
 137          * possible.
 138          */
 139         cpu_data[cpu].data = si;
 140
 141         cpu_time_init();
 142         install_ipi();
 143
 144         /* Install our NMI handler if symmon hasn't installed one. */
 145         install_cpu_nmi_handler(cputoslice(cpu));
 146
 147         set_c0_status(SRB_DEV0 | SRB_DEV1);
 148 }
 149
 150 /*
 151  * get_nasid() returns the physical node id number of the caller.
 152  */
 153 nasid_t
 154 get_nasid(void)
 155 {
 156         return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
 157                          >> NSRI_NODEID_SHFT);
 158 }
 159
 160 /*
 161  * Map the physical node id to a virtual node id (virtual node ids are contiguous).
 162  */
 163 cnodeid_t get_compact_nodeid(void)
 164 {
 165         return NASID_TO_COMPACT_NODEID(get_nasid());
 166 }
 167
 168 /* Extracted from the IOC3 meta driver.  FIXME.  */
 169 static inline void ioc3_sio_init(void)
 170 {
 171         struct ioc3 *ioc3;
 172         nasid_t nid;
 173         long loops;
 174
 175         nid = get_nasid();
 176         ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
 177
 178         ioc3->sscr_a = 0;                       /* PIO mode for uarta.  */
 179         ioc3->sscr_b = 0;                       /* PIO mode for uartb.  */
 180         ioc3->sio_iec = ~0;
 181         ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT);
 182
 183         loops=1000000; while(loops--);
 184         ioc3->sregs.uarta.iu_fcr = 0;
 185         ioc3->sregs.uartb.iu_fcr = 0;
 186         loops=1000000; while(loops--);
 187 }
 188
 189 static inline void ioc3_eth_init(void)
 190 {
 191         struct ioc3 *ioc3;
 192         nasid_t nid;
 193
 194         nid = get_nasid();
 195         ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
 196
 197         ioc3->eier = 0;
 198 }
 199
 200 extern void ip27_reboot_setup(void);
 201
 202 void __init plat_mem_setup(void)
 203 {
 204         hubreg_t p, e, n_mode;
 205         nasid_t nid;
 206
 207         ip27_reboot_setup();
 208
 209         /*
 210          * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
 211          */
 212         nid = get_nasid();
 213         printk("IP27: Running on node %d.\n", nid);
 214
 215         p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
 216         e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
 217         printk("Node %d has %s primary CPU%s.\n", nid,
 218                p ? "a" : "no",
 219                e ? ", CPU is running" : "");
 220
 221         p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
 222         e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
 223         printk("Node %d has %s secondary CPU%s.\n", nid,
 224                p ? "a" : "no",
 225                e ? ", CPU is running" : "");
 226
 227         /*
 228          * Try to catch kernel missconfigurations and give user an
 229          * indication what option to select.
 230          */
 231         n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
 232         printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
 233 #ifdef CONFIG_SGI_SN_N_MODE
 234         if (!n_mode)
 235                 panic("Kernel compiled for M mode.");
 236 #else
 237         if (n_mode)
 238                 panic("Kernel compiled for N mode.");
 239 #endif
 240
 241         ioc3_sio_init();
 242         ioc3_eth_init();
 243         per_cpu_init();
 244
 245         set_io_port_base(IO_BASE);
 246 }