LXR linux/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/bootinfo.h>
  17#include <asm/cpu.h>
  18#include <asm/io.h>
  19#include <asm/sgialib.h>
  20#include <asm/time.h>
  21#include <asm/sn/agent.h>
  22#include <asm/sn/types.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/intr.h>
  28#include <asm/current.h>
  29#include <asm/processor.h>
  30#include <asm/mmu_context.h>
  31#include <asm/thread_info.h>
  32#include <asm/sn/launch.h>
  33#include <asm/sn/mapped_kernel.h>
  34
  35#include "ip27-common.h"
  36
  37#define CPU_NONE                (cpuid_t)-1
  38
  39static DECLARE_BITMAP(hub_init_mask, MAX_NUMNODES);
  40nasid_t master_nasid = INVALID_NASID;
  41
  42struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
  43EXPORT_SYMBOL_GPL(sn_cpu_info);
  44
  45static void per_hub_init(nasid_t nasid)
  46{
  47        struct hub_data *hub = hub_data(nasid);
  48
  49        cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
  50
  51        if (test_and_set_bit(nasid, hub_init_mask))
  52                return;
  53        /*
  54         * Set CRB timeout at 5ms, (< PI timeout of 10ms)
  55         */
  56        REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
  57        REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
  58
  59        hub_rtc_init(nasid);
  60
  61        if (nasid) {
  62                /* copy exception handlers from first node to current node */
  63                memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
  64                       (void *)CKSEG0, 0x200);
  65                __flush_cache_all();
  66                /* switch to node local exception handlers */
  67                REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
  68        }
  69}
  70
  71void per_cpu_init(void)
  72{
  73        int cpu = smp_processor_id();
  74        nasid_t nasid = get_nasid();
  75
  76        clear_c0_status(ST0_IM);
  77
  78        per_hub_init(nasid);
  79
  80        pr_info("CPU %d clock is %dMHz.\n", cpu, sn_cpu_info[cpu].p_speed);
  81
  82        install_ipi();
  83
  84        /* Install our NMI handler if symmon hasn't installed one. */
  85        install_cpu_nmi_handler(cputoslice(cpu));
  86
  87        enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
  88        enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
  89}
  90
  91void __init plat_mem_setup(void)
  92{
  93        u64 p, e, n_mode;
  94        nasid_t nid;
  95
  96        register_smp_ops(&ip27_smp_ops);
  97
  98        ip27_reboot_setup();
  99
 100        /*
 101         * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
 102         */
 103        nid = get_nasid();
 104        printk("IP27: Running on node %d.\n", nid);
 105
 106        p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
 107        e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
 108        printk("Node %d has %s primary CPU%s.\n", nid,
 109               p ? "a" : "no",
 110               e ? ", CPU is running" : "");
 111
 112        p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
 113        e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
 114        printk("Node %d has %s secondary CPU%s.\n", nid,
 115               p ? "a" : "no",
 116               e ? ", CPU is running" : "");
 117
 118        /*
 119         * Try to catch kernel missconfigurations and give user an
 120         * indication what option to select.
 121         */
 122        n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
 123        printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
 124#ifdef CONFIG_SGI_SN_N_MODE
 125        if (!n_mode)
 126                panic("Kernel compiled for M mode.");
 127#else
 128        if (n_mode)
 129                panic("Kernel compiled for N mode.");
 130#endif
 131
 132        ioport_resource.start = 0;
 133        ioport_resource.end = ~0UL;
 134        set_io_port_base(IO_BASE);
 135}
 136
 137const char *get_system_type(void)
 138{
 139        return "SGI Origin";
 140}
 141
 142void __init prom_init(void)
 143{
 144        prom_init_cmdline(fw_arg0, (LONG *)fw_arg1);
 145        prom_meminit();
 146}
 147
 148