err.no Git - linux-2.6/blob - arch/powerpc/platforms/pasemi/setup.c

   1 /*
   2  * Copyright (C) 2006 PA Semi, Inc
   3  *
   4  * Authors: Kip Walker, PA Semi
   5  *          Olof Johansson, PA Semi
   6  *
   7  * Maintained by: Olof Johansson <olof@lixom.net>
   8  *
   9  * Based on arch/powerpc/platforms/maple/setup.c
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  */
  24
  25 #include <linux/errno.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28 #include <linux/console.h>
  29 #include <linux/pci.h>
  30
  31 #include <asm/prom.h>
  32 #include <asm/system.h>
  33 #include <asm/iommu.h>
  34 #include <asm/machdep.h>
  35 #include <asm/mpic.h>
  36 #include <asm/smp.h>
  37 #include <asm/time.h>
  38
  39 #include "pasemi.h"
  40
  41 static void __iomem *reset_reg;
  42
  43 static void pas_restart(char *cmd)
  44 {
  45         printk("Restarting...\n");
  46         while (1)
  47                 out_le32(reset_reg, 0x6000000);
  48 }
  49
  50 #ifdef CONFIG_SMP
  51 struct smp_ops_t pas_smp_ops = {
  52         .probe          = smp_mpic_probe,
  53         .message_pass   = smp_mpic_message_pass,
  54         .kick_cpu       = smp_generic_kick_cpu,
  55         .setup_cpu      = smp_mpic_setup_cpu,
  56         .give_timebase  = smp_generic_give_timebase,
  57         .take_timebase  = smp_generic_take_timebase,
  58 };
  59 #endif /* CONFIG_SMP */
  60
  61 void __init pas_setup_arch(void)
  62 {
  63 #ifdef CONFIG_SMP
  64         /* Setup SMP callback */
  65         smp_ops = &pas_smp_ops;
  66 #endif
  67         /* no iommu yet */
  68         pci_dma_ops = &dma_direct_ops;
  69
  70         /* Lookup PCI hosts */
  71         pas_pci_init();
  72
  73 #ifdef CONFIG_DUMMY_CONSOLE
  74         conswitchp = &dummy_con;
  75 #endif
  76
  77         /* Remap SDC register for doing reset */
  78         /* XXXOJN This should maybe come out of the device tree */
  79         reset_reg = ioremap(0xfc101100, 4);
  80
  81         pasemi_idle_init();
  82 }
  83
  84 /* No legacy IO on our parts */
  85 static int pas_check_legacy_ioport(unsigned int baseport)
  86 {
  87         return -ENODEV;
  88 }
  89
  90 static __init void pas_init_IRQ(void)
  91 {
  92         struct device_node *np;
  93         struct device_node *root, *mpic_node;
  94         unsigned long openpic_addr;
  95         const unsigned int *opprop;
  96         int naddr, opplen;
  97         struct mpic *mpic;
  98
  99         mpic_node = NULL;
 100
 101         for_each_node_by_type(np, "interrupt-controller")
 102                 if (device_is_compatible(np, "open-pic")) {
 103                         mpic_node = np;
 104                         break;
 105                 }
 106         if (!mpic_node)
 107                 for_each_node_by_type(np, "open-pic") {
 108                         mpic_node = np;
 109                         break;
 110                 }
 111         if (!mpic_node) {
 112                 printk(KERN_ERR
 113                         "Failed to locate the MPIC interrupt controller\n");
 114                 return;
 115         }
 116
 117         /* Find address list in /platform-open-pic */
 118         root = of_find_node_by_path("/");
 119         naddr = prom_n_addr_cells(root);
 120         opprop = get_property(root, "platform-open-pic", &opplen);
 121         if (!opprop) {
 122                 printk(KERN_ERR "No platform-open-pic property.\n");
 123                 of_node_put(root);
 124                 return;
 125         }
 126         openpic_addr = of_read_number(opprop, naddr);
 127         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 128
 129         mpic = mpic_alloc(mpic_node, openpic_addr,
 130                           MPIC_PRIMARY|MPIC_LARGE_VECTORS,
 131                           0, 0, " PAS-OPIC  ");
 132         BUG_ON(!mpic);
 133
 134         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
 135         mpic_init(mpic);
 136         of_node_put(mpic_node);
 137         of_node_put(root);
 138 }
 139
 140 static void __init pas_progress(char *s, unsigned short hex)
 141 {
 142         printk("[%04x] : %s\n", hex, s ? s : "");
 143 }
 144
 145
 146 static int pas_machine_check_handler(struct pt_regs *regs)
 147 {
 148         int cpu = smp_processor_id();
 149         unsigned long srr0, srr1, dsisr;
 150
 151         srr0 = regs->nip;
 152         srr1 = regs->msr;
 153         dsisr = mfspr(SPRN_DSISR);
 154         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
 155         printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
 156         printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
 157         printk(KERN_ERR "Cause:\n");
 158
 159         if (srr1 & 0x200000)
 160                 printk(KERN_ERR "Signalled by SDC\n");
 161         if (srr1 & 0x100000) {
 162                 printk(KERN_ERR "Load/Store detected error:\n");
 163                 if (dsisr & 0x8000)
 164                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
 165                 if (dsisr & 0x4000)
 166                         printk(KERN_ERR "LSU snoop response error\n");
 167                 if (dsisr & 0x2000)
 168                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
 169                 if (dsisr & 0x1000)
 170                         printk(KERN_ERR "Recoverable Duptags\n");
 171                 if (dsisr & 0x800)
 172                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
 173                 if (dsisr & 0x400)
 174                         printk(KERN_ERR "TLB parity error count overflow\n");
 175         }
 176         if (srr1 & 0x80000)
 177                 printk(KERN_ERR "Bus Error\n");
 178         if (srr1 & 0x40000)
 179                 printk(KERN_ERR "I-side SLB multiple hit\n");
 180         if (srr1 & 0x20000)
 181                 printk(KERN_ERR "I-cache parity error hit\n");
 182
 183         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
 184         return !!(srr1 & 0x2);
 185 }
 186
 187
 188 /*
 189  * Called very early, MMU is off, device-tree isn't unflattened
 190  */
 191 static int __init pas_probe(void)
 192 {
 193         unsigned long root = of_get_flat_dt_root();
 194
 195         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
 196                 return 0;
 197
 198         hpte_init_native();
 199
 200         return 1;
 201 }
 202
 203 define_machine(pas) {
 204         .name                   = "PA Semi PA6T-1682M",
 205         .probe                  = pas_probe,
 206         .setup_arch             = pas_setup_arch,
 207         .init_IRQ               = pas_init_IRQ,
 208         .get_irq                = mpic_get_irq,
 209         .restart                = pas_restart,
 210         .get_boot_time          = pas_get_boot_time,
 211         .calibrate_decr         = generic_calibrate_decr,
 212         .check_legacy_ioport    = pas_check_legacy_ioport,
 213         .progress               = pas_progress,
 214         .machine_check_exception = pas_machine_check_handler,
 215 };