arch/powerpc/platforms/pasemi/setup.c

   1 /*
   2  * Copyright (C) 2006-2007 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 static DEFINE_SPINLOCK(timebase_lock);
  52
  53 static void __devinit pas_give_timebase(void)
  54 {
  55         unsigned long tb;
  56
  57         spin_lock(&timebase_lock);
  58         mtspr(SPRN_TBCTL, TBCTL_FREEZE);
  59         tb = mftb();
  60         mtspr(SPRN_TBCTL, TBCTL_UPDATE_LOWER | (tb & 0xffffffff));
  61         mtspr(SPRN_TBCTL, TBCTL_UPDATE_UPPER | (tb >> 32));
  62         mtspr(SPRN_TBCTL, TBCTL_RESTART);
  63         spin_unlock(&timebase_lock);
  64         pr_debug("pas_give_timebase: cpu %d gave tb %lx\n",
  65                  smp_processor_id(), tb);
  66 }
  67
  68 static void __devinit pas_take_timebase(void)
  69 {
  70         pr_debug("pas_take_timebase: cpu %d has tb %lx\n",
  71                  smp_processor_id(), mftb());
  72 }
  73
  74 struct smp_ops_t pas_smp_ops = {
  75         .probe          = smp_mpic_probe,
  76         .message_pass   = smp_mpic_message_pass,
  77         .kick_cpu       = smp_generic_kick_cpu,
  78         .setup_cpu      = smp_mpic_setup_cpu,
  79         .give_timebase  = pas_give_timebase,
  80         .take_timebase  = pas_take_timebase,
  81 };
  82 #endif /* CONFIG_SMP */
  83
  84 void __init pas_setup_arch(void)
  85 {
  86 #ifdef CONFIG_SMP
  87         /* Setup SMP callback */
  88         smp_ops = &pas_smp_ops;
  89 #endif
  90         /* Lookup PCI hosts */
  91         pas_pci_init();
  92
  93 #ifdef CONFIG_DUMMY_CONSOLE
  94         conswitchp = &dummy_con;
  95 #endif
  96
  97         /* Remap SDC register for doing reset */
  98         /* XXXOJN This should maybe come out of the device tree */
  99         reset_reg = ioremap(0xfc101100, 4);
 100
 101         pasemi_idle_init();
 102 }
 103
 104 /* No legacy IO on our parts */
 105 static int pas_check_legacy_ioport(unsigned int baseport)
 106 {
 107         return -ENODEV;
 108 }
 109
 110 static __init void pas_init_IRQ(void)
 111 {
 112         struct device_node *np;
 113         struct device_node *root, *mpic_node;
 114         unsigned long openpic_addr;
 115         const unsigned int *opprop;
 116         int naddr, opplen;
 117         struct mpic *mpic;
 118
 119         mpic_node = NULL;
 120
 121         for_each_node_by_type(np, "interrupt-controller")
 122                 if (device_is_compatible(np, "open-pic")) {
 123                         mpic_node = np;
 124                         break;
 125                 }
 126         if (!mpic_node)
 127                 for_each_node_by_type(np, "open-pic") {
 128                         mpic_node = np;
 129                         break;
 130                 }
 131         if (!mpic_node) {
 132                 printk(KERN_ERR
 133                         "Failed to locate the MPIC interrupt controller\n");
 134                 return;
 135         }
 136
 137         /* Find address list in /platform-open-pic */
 138         root = of_find_node_by_path("/");
 139         naddr = prom_n_addr_cells(root);
 140         opprop = get_property(root, "platform-open-pic", &opplen);
 141         if (!opprop) {
 142                 printk(KERN_ERR "No platform-open-pic property.\n");
 143                 of_node_put(root);
 144                 return;
 145         }
 146         openpic_addr = of_read_number(opprop, naddr);
 147         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 148
 149         mpic = mpic_alloc(mpic_node, openpic_addr,
 150                           MPIC_PRIMARY|MPIC_LARGE_VECTORS,
 151                           0, 0, " PAS-OPIC  ");
 152         BUG_ON(!mpic);
 153
 154         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
 155         mpic_init(mpic);
 156         of_node_put(mpic_node);
 157         of_node_put(root);
 158 }
 159
 160 static void __init pas_progress(char *s, unsigned short hex)
 161 {
 162         printk("[%04x] : %s\n", hex, s ? s : "");
 163 }
 164
 165
 166 static int pas_machine_check_handler(struct pt_regs *regs)
 167 {
 168         int cpu = smp_processor_id();
 169         unsigned long srr0, srr1, dsisr;
 170
 171         srr0 = regs->nip;
 172         srr1 = regs->msr;
 173         dsisr = mfspr(SPRN_DSISR);
 174         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
 175         printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
 176         printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
 177         printk(KERN_ERR "Cause:\n");
 178
 179         if (srr1 & 0x200000)
 180                 printk(KERN_ERR "Signalled by SDC\n");
 181         if (srr1 & 0x100000) {
 182                 printk(KERN_ERR "Load/Store detected error:\n");
 183                 if (dsisr & 0x8000)
 184                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
 185                 if (dsisr & 0x4000)
 186                         printk(KERN_ERR "LSU snoop response error\n");
 187                 if (dsisr & 0x2000)
 188                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
 189                 if (dsisr & 0x1000)
 190                         printk(KERN_ERR "Recoverable Duptags\n");
 191                 if (dsisr & 0x800)
 192                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
 193                 if (dsisr & 0x400)
 194                         printk(KERN_ERR "TLB parity error count overflow\n");
 195         }
 196         if (srr1 & 0x80000)
 197                 printk(KERN_ERR "Bus Error\n");
 198         if (srr1 & 0x40000)
 199                 printk(KERN_ERR "I-side SLB multiple hit\n");
 200         if (srr1 & 0x20000)
 201                 printk(KERN_ERR "I-cache parity error hit\n");
 202
 203         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
 204         return !!(srr1 & 0x2);
 205 }
 206
 207 static void __init pas_init_early(void)
 208 {
 209         iommu_init_early_pasemi();
 210 }
 211
 212
 213 /*
 214  * Called very early, MMU is off, device-tree isn't unflattened
 215  */
 216 static int __init pas_probe(void)
 217 {
 218         unsigned long root = of_get_flat_dt_root();
 219
 220         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
 221                 return 0;
 222
 223         hpte_init_native();
 224
 225         alloc_iobmap_l2();
 226
 227         return 1;
 228 }
 229
 230 define_machine(pas) {
 231         .name                   = "PA Semi PA6T-1682M",
 232         .probe                  = pas_probe,
 233         .setup_arch             = pas_setup_arch,
 234         .init_early             = pas_init_early,
 235         .init_IRQ               = pas_init_IRQ,
 236         .get_irq                = mpic_get_irq,
 237         .restart                = pas_restart,
 238         .get_boot_time          = pas_get_boot_time,
 239         .calibrate_decr         = generic_calibrate_decr,
 240         .check_legacy_ioport    = pas_check_legacy_ioport,
 241         .progress               = pas_progress,
 242         .machine_check_exception = pas_machine_check_handler,
 243         .pci_irq_fixup          = pas_pci_irq_fixup,
 244 };