release/src-rt-6.x/linux/linux-2.6/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/smp.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 extern void pcibr_setup(cnodeid_t);
  51
  52 extern void xtalk_probe_node(cnodeid_t nid);
  53
  54 static void __cpuinit per_hub_init(cnodeid_t cnode)
  55 {
  56         struct hub_data *hub = hub_data(cnode);
  57         nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
  58         int i;
  59
  60         cpu_set(smp_processor_id(), hub->h_cpus);
  61
  62         if (test_and_set_bit(cnode, hub_init_mask))
  63                 return;
  64         /*
  65          * Set CRB timeout at 5ms, (< PI timeout of 10ms)
  66          */
  67         REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
  68         REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
  69
  70         hub_rtc_init(cnode);
  71         xtalk_probe_node(cnode);
  72
  73 #ifdef CONFIG_REPLICATE_EXHANDLERS
  74         /*
  75          * If this is not a headless node initialization,
  76          * copy over the caliased exception handlers.
  77          */
  78         if (get_compact_nodeid() == cnode) {
  79                 extern char except_vec2_generic, except_vec3_generic;
  80                 extern void build_tlb_refill_handler(void);
  81
  82                 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
  83                 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
  84                 build_tlb_refill_handler();
  85                 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
  86                 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
  87                 __flush_cache_all();
  88         }
  89 #endif
  90
  91         /*
  92          * Some interrupts are reserved by hardware or by software convention.
  93          * Mark these as reserved right away so they won't be used accidently
  94          * later.
  95          */
  96         for (i = 0; i <= BASE_PCI_IRQ; i++) {
  97                 __set_bit(i, hub->irq_alloc_mask);
  98                 LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i);
  99         }
 100
 101         __set_bit(IP_PEND0_6_63, hub->irq_alloc_mask);
 102         LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63);
 103
 104         for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) {
 105                 __set_bit(i, hub->irq_alloc_mask);
 106                 LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i);
 107         }
 108 }
 109
 110 void __init per_cpu_init(void)
 111 {
 112         int cpu = smp_processor_id();
 113         int slice = LOCAL_HUB_L(PI_CPU_NUM);
 114         cnodeid_t cnode = get_compact_nodeid();
 115         struct hub_data *hub = hub_data(cnode);
 116         struct slice_data *si = hub->slice + slice;
 117         int i;
 118
 119         if (test_and_set_bit(slice, &hub->slice_map))
 120                 return;
 121
 122         clear_c0_status(ST0_IM);
 123
 124         per_hub_init(cnode);
 125
 126         for (i = 0; i < LEVELS_PER_SLICE; i++)
 127                 si->level_to_irq[i] = -1;
 128
 129         /*
 130          * We use this so we can find the local hub's data as fast as only
 131          * possible.
 132          */
 133         cpu_data[cpu].data = si;
 134
 135         cpu_time_init();
 136         install_ipi();
 137
 138         /* Install our NMI handler if symmon hasn't installed one. */
 139         install_cpu_nmi_handler(cputoslice(cpu));
 140
 141         set_c0_status(SRB_DEV0 | SRB_DEV1);
 142 }
 143
 144 /*
 145  * get_nasid() returns the physical node id number of the caller.
 146  */
 147 nasid_t
 148 get_nasid(void)
 149 {
 150         return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
 151                          >> NSRI_NODEID_SHFT);
 152 }
 153
 154 /*
 155  * Map the physical node id to a virtual node id (virtual node ids are contiguous).
 156  */
 157 cnodeid_t get_compact_nodeid(void)
 158 {
 159         return NASID_TO_COMPACT_NODEID(get_nasid());
 160 }
 161
 162 /* Extracted from the IOC3 meta driver.  FIXME.  */
 163 static inline void ioc3_sio_init(void)
 164 {
 165         struct ioc3 *ioc3;
 166         nasid_t nid;
 167         long loops;
 168
 169         nid = get_nasid();
 170         ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
 171
 172         ioc3->sscr_a = 0;                       /* PIO mode for uarta.  */
 173         ioc3->sscr_b = 0;                       /* PIO mode for uartb.  */
 174         ioc3->sio_iec = ~0;
 175         ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT);
 176
 177         loops=1000000; while(loops--);
 178         ioc3->sregs.uarta.iu_fcr = 0;
 179         ioc3->sregs.uartb.iu_fcr = 0;
 180         loops=1000000; while(loops--);
 181 }
 182
 183 static inline void ioc3_eth_init(void)
 184 {
 185         struct ioc3 *ioc3;
 186         nasid_t nid;
 187
 188         nid = get_nasid();
 189         ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
 190
 191         ioc3->eier = 0;
 192 }
 193
 194 extern void ip27_time_init(void);
 195 extern void ip27_reboot_setup(void);
 196
 197 void __init plat_mem_setup(void)
 198 {
 199         hubreg_t p, e, n_mode;
 200         nasid_t nid;
 201
 202         ip27_reboot_setup();
 203
 204         /*
 205          * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
 206          */
 207         nid = get_nasid();
 208         printk("IP27: Running on node %d.\n", nid);
 209
 210         p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
 211         e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
 212         printk("Node %d has %s primary CPU%s.\n", nid,
 213                p ? "a" : "no",
 214                e ? ", CPU is running" : "");
 215
 216         p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
 217         e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
 218         printk("Node %d has %s secondary CPU%s.\n", nid,
 219                p ? "a" : "no",
 220                e ? ", CPU is running" : "");
 221
 222         /*
 223          * Try to catch kernel missconfigurations and give user an
 224          * indication what option to select.
 225          */
 226         n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
 227         printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
 228 #ifdef CONFIG_SGI_SN_N_MODE
 229         if (!n_mode)
 230                 panic("Kernel compiled for M mode.");
 231 #else
 232         if (n_mode)
 233                 panic("Kernel compiled for N mode.");
 234 #endif
 235
 236         ioc3_sio_init();
 237         ioc3_eth_init();
 238         per_cpu_init();
 239
 240         set_io_port_base(IO_BASE);
 241
 242         board_time_init = ip27_time_init;
 243 }