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