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 #include <asm/of_platform.h>
  39
  40 #include "pasemi.h"
  41
  42 static void __iomem *reset_reg;
  43
  44 static void pas_restart(char *cmd)
  45 {
  46         printk("Restarting...\n");
  47         while (1)
  48                 out_le32(reset_reg, 0x6000000);
  49 }
  50
  51 #ifdef CONFIG_SMP
  52 static DEFINE_SPINLOCK(timebase_lock);
  53 static unsigned long timebase;
  54
  55 static void __devinit pas_give_timebase(void)
  56 {
  57         spin_lock(&timebase_lock);
  58         mtspr(SPRN_TBCTL, TBCTL_FREEZE);
  59         isync();
  60         timebase = get_tb();
  61         spin_unlock(&timebase_lock);
  62
  63         while (timebase)
  64                 barrier();
  65         mtspr(SPRN_TBCTL, TBCTL_RESTART);
  66 }
  67
  68 static void __devinit pas_take_timebase(void)
  69 {
  70         while (!timebase)
  71                 smp_rmb();
  72
  73         spin_lock(&timebase_lock);
  74         set_tb(timebase >> 32, timebase & 0xffffffff);
  75         timebase = 0;
  76         spin_unlock(&timebase_lock);
  77 }
  78
  79 struct smp_ops_t pas_smp_ops = {
  80         .probe          = smp_mpic_probe,
  81         .message_pass   = smp_mpic_message_pass,
  82         .kick_cpu       = smp_generic_kick_cpu,
  83         .setup_cpu      = smp_mpic_setup_cpu,
  84         .give_timebase  = pas_give_timebase,
  85         .take_timebase  = pas_take_timebase,
  86 };
  87 #endif /* CONFIG_SMP */
  88
  89 void __init pas_setup_arch(void)
  90 {
  91 #ifdef CONFIG_SMP
  92         /* Setup SMP callback */
  93         smp_ops = &pas_smp_ops;
  94 #endif
  95         /* Lookup PCI hosts */
  96         pas_pci_init();
  97
  98 #ifdef CONFIG_DUMMY_CONSOLE
  99         conswitchp = &dummy_con;
 100 #endif
 101
 102         /* Remap SDC register for doing reset */
 103         /* XXXOJN This should maybe come out of the device tree */
 104         reset_reg = ioremap(0xfc101100, 4);
 105
 106         pasemi_idle_init();
 107 }
 108
 109 static __init void pas_init_IRQ(void)
 110 {
 111         struct device_node *np;
 112         struct device_node *root, *mpic_node;
 113         unsigned long openpic_addr;
 114         const unsigned int *opprop;
 115         int naddr, opplen;
 116         struct mpic *mpic;
 117
 118         mpic_node = NULL;
 119
 120         for_each_node_by_type(np, "interrupt-controller")
 121                 if (of_device_is_compatible(np, "open-pic")) {
 122                         mpic_node = np;
 123                         break;
 124                 }
 125         if (!mpic_node)
 126                 for_each_node_by_type(np, "open-pic") {
 127                         mpic_node = np;
 128                         break;
 129                 }
 130         if (!mpic_node) {
 131                 printk(KERN_ERR
 132                         "Failed to locate the MPIC interrupt controller\n");
 133                 return;
 134         }
 135
 136         /* Find address list in /platform-open-pic */
 137         root = of_find_node_by_path("/");
 138         naddr = of_n_addr_cells(root);
 139         opprop = of_get_property(root, "platform-open-pic", &opplen);
 140         if (!opprop) {
 141                 printk(KERN_ERR "No platform-open-pic property.\n");
 142                 of_node_put(root);
 143                 return;
 144         }
 145         openpic_addr = of_read_number(opprop, naddr);
 146         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 147
 148         mpic = mpic_alloc(mpic_node, openpic_addr,
 149                           MPIC_PRIMARY|MPIC_LARGE_VECTORS|MPIC_WANTS_RESET,
 150                           0, 0, " PAS-OPIC  ");
 151         BUG_ON(!mpic);
 152
 153         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
 154         mpic_init(mpic);
 155         of_node_put(mpic_node);
 156         of_node_put(root);
 157 }
 158
 159 static void __init pas_progress(char *s, unsigned short hex)
 160 {
 161         printk("[%04x] : %s\n", hex, s ? s : "");
 162 }
 163
 164
 165 static int pas_machine_check_handler(struct pt_regs *regs)
 166 {
 167         int cpu = smp_processor_id();
 168         unsigned long srr0, srr1, dsisr;
 169
 170         srr0 = regs->nip;
 171         srr1 = regs->msr;
 172         dsisr = mfspr(SPRN_DSISR);
 173         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
 174         printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
 175         printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
 176         printk(KERN_ERR "Cause:\n");
 177
 178         if (srr1 & 0x200000)
 179                 printk(KERN_ERR "Signalled by SDC\n");
 180         if (srr1 & 0x100000) {
 181                 printk(KERN_ERR "Load/Store detected error:\n");
 182                 if (dsisr & 0x8000)
 183                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
 184                 if (dsisr & 0x4000)
 185                         printk(KERN_ERR "LSU snoop response error\n");
 186                 if (dsisr & 0x2000)
 187                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
 188                 if (dsisr & 0x1000)
 189                         printk(KERN_ERR "Recoverable Duptags\n");
 190                 if (dsisr & 0x800)
 191                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
 192                 if (dsisr & 0x400)
 193                         printk(KERN_ERR "TLB parity error count overflow\n");
 194         }
 195         if (srr1 & 0x80000)
 196                 printk(KERN_ERR "Bus Error\n");
 197         if (srr1 & 0x40000)
 198                 printk(KERN_ERR "I-side SLB multiple hit\n");
 199         if (srr1 & 0x20000)
 200                 printk(KERN_ERR "I-cache parity error hit\n");
 201
 202         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
 203         return !!(srr1 & 0x2);
 204 }
 205
 206 static void __init pas_init_early(void)
 207 {
 208         iommu_init_early_pasemi();
 209 }
 210
 211 static struct of_device_id pasemi_bus_ids[] = {
 212         { .type = "sdc", },
 213         {},
 214 };
 215
 216 static int __init pasemi_publish_devices(void)
 217 {
 218         if (!machine_is(pasemi))
 219                 return 0;
 220
 221         /* Publish OF platform devices for SDC and other non-PCI devices */
 222         of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
 223
 224         return 0;
 225 }
 226 device_initcall(pasemi_publish_devices);
 227
 228
 229 /*
 230  * Called very early, MMU is off, device-tree isn't unflattened
 231  */
 232 static int __init pas_probe(void)
 233 {
 234         unsigned long root = of_get_flat_dt_root();
 235
 236         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
 237                 return 0;
 238
 239         hpte_init_native();
 240
 241         alloc_iobmap_l2();
 242
 243         return 1;
 244 }
 245
 246 define_machine(pasemi) {
 247         .name                   = "PA Semi PA6T-1682M",
 248         .probe                  = pas_probe,
 249         .setup_arch             = pas_setup_arch,
 250         .init_early             = pas_init_early,
 251         .init_IRQ               = pas_init_IRQ,
 252         .get_irq                = mpic_get_irq,
 253         .restart                = pas_restart,
 254         .get_boot_time          = pas_get_boot_time,
 255         .calibrate_decr         = generic_calibrate_decr,
 256         .progress               = pas_progress,
 257         .machine_check_exception = pas_machine_check_handler,
 258 };