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/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
  55static void per_hub_init(cnodeid_t cnode)
  56{
  57        struct hub_data *hub = hub_data(cnode);
  58        nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
  59
  60        cpumask_set_cpu(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
  72        if (nasid) {
  73                /* copy exception handlers from first node to current node */
  74                memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
  75                       (void *)CKSEG0, 0x200);
  76                __flush_cache_all();
  77                /* switch to node local exception handlers */
  78                REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
  79        }
  80}
  81
  82void per_cpu_init(void)
  83{
  84        int cpu = smp_processor_id();
  85        int slice = LOCAL_HUB_L(PI_CPU_NUM);
  86        cnodeid_t cnode = get_compact_nodeid();
  87        struct hub_data *hub = hub_data(cnode);
  88
  89        if (test_and_set_bit(slice, &hub->slice_map))
  90                return;
  91
  92        clear_c0_status(ST0_IM);
  93
  94        per_hub_init(cnode);
  95
  96        cpu_time_init();
  97        install_ipi();
  98
  99        /* Install our NMI handler if symmon hasn't installed one. */
 100        install_cpu_nmi_handler(cputoslice(cpu));
 101
 102        enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
 103        enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
 104}
 105
 106/*
 107 * get_nasid() returns the physical node id number of the caller.
 108 */
 109nasid_t
 110get_nasid(void)
 111{
 112        return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
 113                         >> NSRI_NODEID_SHFT);
 114}
 115
 116/*
 117 * Map the physical node id to a virtual node id (virtual node ids are contiguous).
 118 */
 119cnodeid_t get_compact_nodeid(void)
 120{
 121        return NASID_TO_COMPACT_NODEID(get_nasid());
 122}
 123
 124extern void ip27_reboot_setup(void);
 125
 126void __init plat_mem_setup(void)
 127{
 128        u64 p, e, n_mode;
 129        nasid_t nid;
 130
 131        ip27_reboot_setup();
 132
 133        /*
 134         * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
 135         */
 136        nid = get_nasid();
 137        printk("IP27: Running on node %d.\n", nid);
 138
 139        p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
 140        e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
 141        printk("Node %d has %s primary CPU%s.\n", nid,
 142               p ? "a" : "no",
 143               e ? ", CPU is running" : "");
 144
 145        p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
 146        e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
 147        printk("Node %d has %s secondary CPU%s.\n", nid,
 148               p ? "a" : "no",
 149               e ? ", CPU is running" : "");
 150
 151        /*
 152         * Try to catch kernel missconfigurations and give user an
 153         * indication what option to select.
 154         */
 155        n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
 156        printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
 157#ifdef CONFIG_SGI_SN_N_MODE
 158        if (!n_mode)
 159                panic("Kernel compiled for M mode.");
 160#else
 161        if (n_mode)
 162                panic("Kernel compiled for N mode.");
 163#endif
 164
 165        ioport_resource.start = 0;
 166        ioport_resource.end = ~0UL;
 167        set_io_port_base(IO_BASE);
 168}
 169