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