linux/arch/mips/sgi-ip27/ip27-init.c
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   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/module.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
  41static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
  42nasid_t master_nasid = INVALID_NASID;
  43
  44cnodeid_t       nasid_to_compact_node[MAX_NASIDS];
  45nasid_t         compact_to_nasid_node[MAX_COMPACT_NODES];
  46cnodeid_t       cpuid_to_compact_node[MAXCPUS];
  47
  48EXPORT_SYMBOL(nasid_to_compact_node);
  49
  50struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
  51EXPORT_SYMBOL_GPL(sn_cpu_info);
  52
  53extern void pcibr_setup(cnodeid_t);
  54
  55extern void xtalk_probe_node(cnodeid_t nid);
  56
  57static 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        cpu_set(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
 113void 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 */
 150nasid_t
 151get_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 */
 160cnodeid_t get_compact_nodeid(void)
 161{
 162        return NASID_TO_COMPACT_NODEID(get_nasid());
 163}
 164
 165static 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
 176extern void ip27_reboot_setup(void);
 177
 178void __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}
 222