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   1 /*
   2  *  arch/ppc64/kernel/maple_setup.c
   3  *
   4  *  (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
   5  *                     IBM Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU General Public License
   9  *  as published by the Free Software Foundation; either version
  10  *  2 of the License, or (at your option) any later version.
  11  *
  12  */
  13
  14 #define DEBUG
  15
  16 #include <linux/config.h>
  17 #include <linux/init.h>
  18 #include <linux/errno.h>
  19 #include <linux/sched.h>
  20 #include <linux/kernel.h>
  21 #include <linux/mm.h>
  22 #include <linux/stddef.h>
  23 #include <linux/unistd.h>
  24 #include <linux/ptrace.h>
  25 #include <linux/slab.h>
  26 #include <linux/user.h>
  27 #include <linux/a.out.h>
  28 #include <linux/tty.h>
  29 #include <linux/string.h>
  30 #include <linux/delay.h>
  31 #include <linux/ioport.h>
  32 #include <linux/major.h>
  33 #include <linux/initrd.h>
  34 #include <linux/vt_kern.h>
  35 #include <linux/console.h>
  36 #include <linux/ide.h>
  37 #include <linux/pci.h>
  38 #include <linux/adb.h>
  39 #include <linux/cuda.h>
  40 #include <linux/pmu.h>
  41 #include <linux/irq.h>
  42 #include <linux/seq_file.h>
  43 #include <linux/root_dev.h>
  44 #include <linux/serial.h>
  45 #include <linux/smp.h>
  46
  47 #include <asm/processor.h>
  48 #include <asm/sections.h>
  49 #include <asm/prom.h>
  50 #include <asm/system.h>
  51 #include <asm/pgtable.h>
  52 #include <asm/bitops.h>
  53 #include <asm/io.h>
  54 #include <asm/pci-bridge.h>
  55 #include <asm/iommu.h>
  56 #include <asm/machdep.h>
  57 #include <asm/dma.h>
  58 #include <asm/cputable.h>
  59 #include <asm/time.h>
  60 #include <asm/of_device.h>
  61 #include <asm/lmb.h>
  62
  63 #include "mpic.h"
  64
  65 #ifdef DEBUG
  66 #define DBG(fmt...) udbg_printf(fmt)
  67 #else
  68 #define DBG(fmt...)
  69 #endif
  70
  71 extern int maple_set_rtc_time(struct rtc_time *tm);
  72 extern void maple_get_rtc_time(struct rtc_time *tm);
  73 extern void maple_get_boot_time(struct rtc_time *tm);
  74 extern void maple_calibrate_decr(void);
  75 extern void maple_pci_init(void);
  76 extern void maple_pcibios_fixup(void);
  77 extern int maple_pci_get_legacy_ide_irq(struct pci_dev *dev, int channel);
  78 extern void generic_find_legacy_serial_ports(u64 *physport,
  79                 unsigned int *default_speed);
  80
  81 static void maple_restart(char *cmd)
  82 {
  83         unsigned int maple_nvram_base;
  84         unsigned int maple_nvram_offset;
  85         unsigned int maple_nvram_command;
  86         struct device_node *rtcs;
  87
  88         /* find NVRAM device */
  89         rtcs = find_compatible_devices("nvram", "AMD8111");
  90         if (rtcs && rtcs->addrs) {
  91                 maple_nvram_base = rtcs->addrs[0].address;
  92         } else {
  93                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
  94                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
  95                 return;
  96         }
  97
  98         /* find service processor device */
  99         rtcs = find_devices("service-processor");
 100         if (!rtcs) {
 101                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 102                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
 103                 return;
 104         }
 105         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 106                         "restart-addr", NULL);
 107         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 108                         "restart-value", NULL);
 109
 110         /* send command */
 111         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 112         for (;;) ;
 113 }
 114
 115 static void maple_power_off(void)
 116 {
 117         unsigned int maple_nvram_base;
 118         unsigned int maple_nvram_offset;
 119         unsigned int maple_nvram_command;
 120         struct device_node *rtcs;
 121
 122         /* find NVRAM device */
 123         rtcs = find_compatible_devices("nvram", "AMD8111");
 124         if (rtcs && rtcs->addrs) {
 125                 maple_nvram_base = rtcs->addrs[0].address;
 126         } else {
 127                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
 128                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 129                 return;
 130         }
 131
 132         /* find service processor device */
 133         rtcs = find_devices("service-processor");
 134         if (!rtcs) {
 135                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 136                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 137                 return;
 138         }
 139         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 140                         "power-off-addr", NULL);
 141         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 142                         "power-off-value", NULL);
 143
 144         /* send command */
 145         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 146         for (;;) ;
 147 }
 148
 149 static void maple_halt(void)
 150 {
 151         maple_power_off();
 152 }
 153
 154 #ifdef CONFIG_SMP
 155 struct smp_ops_t maple_smp_ops = {
 156         .probe          = smp_mpic_probe,
 157         .message_pass   = smp_mpic_message_pass,
 158         .kick_cpu       = smp_generic_kick_cpu,
 159         .setup_cpu      = smp_mpic_setup_cpu,
 160         .give_timebase  = smp_generic_give_timebase,
 161         .take_timebase  = smp_generic_take_timebase,
 162 };
 163 #endif /* CONFIG_SMP */
 164
 165 void __init maple_setup_arch(void)
 166 {
 167         /* init to some ~sane value until calibrate_delay() runs */
 168         loops_per_jiffy = 50000000;
 169
 170         /* Setup SMP callback */
 171 #ifdef CONFIG_SMP
 172         smp_ops = &maple_smp_ops;
 173 #endif
 174         /* Lookup PCI hosts */
 175         maple_pci_init();
 176
 177 #ifdef CONFIG_DUMMY_CONSOLE
 178         conswitchp = &dummy_con;
 179 #endif
 180
 181         printk(KERN_INFO "Using native/NAP idle loop\n");
 182 }
 183
 184 /*
 185  * Early initialization.
 186  */
 187 static void __init maple_init_early(void)
 188 {
 189         unsigned int default_speed;
 190         u64 physport;
 191
 192         DBG(" -> maple_init_early\n");
 193
 194         /* Initialize hash table, from now on, we can take hash faults
 195          * and call ioremap
 196          */
 197         hpte_init_native();
 198
 199         /* Find the serial port */
 200         generic_find_legacy_serial_ports(&physport, &default_speed);
 201
 202         DBG("phys port addr: %lx\n", (long)physport);
 203
 204         if (physport) {
 205                 void *comport;
 206                 /* Map the uart for udbg. */
 207                 comport = (void *)ioremap(physport, 16);
 208                 udbg_init_uart(comport, default_speed);
 209
 210                 ppc_md.udbg_putc = udbg_putc;
 211                 ppc_md.udbg_getc = udbg_getc;
 212                 ppc_md.udbg_getc_poll = udbg_getc_poll;
 213                 DBG("Hello World !\n");
 214         }
 215
 216         /* Setup interrupt mapping options */
 217         ppc64_interrupt_controller = IC_OPEN_PIC;
 218
 219         iommu_init_early_u3();
 220
 221         DBG(" <- maple_init_early\n");
 222 }
 223
 224
 225 static __init void maple_init_IRQ(void)
 226 {
 227         struct device_node *root;
 228         unsigned int *opprop;
 229         unsigned long opic_addr;
 230         struct mpic *mpic;
 231         unsigned char senses[128];
 232         int n;
 233
 234         DBG(" -> maple_init_IRQ\n");
 235
 236         /* XXX: Non standard, replace that with a proper openpic/mpic node
 237          * in the device-tree. Find the Open PIC if present */
 238         root = of_find_node_by_path("/");
 239         opprop = (unsigned int *) get_property(root,
 240                                 "platform-open-pic", NULL);
 241         if (opprop == 0)
 242                 panic("OpenPIC not found !\n");
 243
 244         n = prom_n_addr_cells(root);
 245         for (opic_addr = 0; n > 0; --n)
 246                 opic_addr = (opic_addr << 32) + *opprop++;
 247         of_node_put(root);
 248
 249         /* Obtain sense values from device-tree */
 250         prom_get_irq_senses(senses, 0, 128);
 251
 252         mpic = mpic_alloc(opic_addr,
 253                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
 254                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
 255                           0, 0, 128, 128, senses, 128, "U3-MPIC");
 256         BUG_ON(mpic == NULL);
 257         mpic_init(mpic);
 258
 259         DBG(" <- maple_init_IRQ\n");
 260 }
 261
 262 static void __init maple_progress(char *s, unsigned short hex)
 263 {
 264         printk("*** %04x : %s\n", hex, s ? s : "");
 265 }
 266
 267
 268 /*
 269  * Called very early, MMU is off, device-tree isn't unflattened
 270  */
 271 static int __init maple_probe(int platform)
 272 {
 273         if (platform != PLATFORM_MAPLE)
 274                 return 0;
 275         /*
 276          * On U3, the DART (iommu) must be allocated now since it
 277          * has an impact on htab_initialize (due to the large page it
 278          * occupies having to be broken up so the DART itself is not
 279          * part of the cacheable linar mapping
 280          */
 281         alloc_u3_dart_table();
 282
 283         return 1;
 284 }
 285
 286 struct machdep_calls __initdata maple_md = {
 287         .probe                  = maple_probe,
 288         .setup_arch             = maple_setup_arch,
 289         .init_early             = maple_init_early,
 290         .init_IRQ               = maple_init_IRQ,
 291         .get_irq                = mpic_get_irq,
 292         .pcibios_fixup          = maple_pcibios_fixup,
 293         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
 294         .restart                = maple_restart,
 295         .power_off              = maple_power_off,
 296         .halt                   = maple_halt,
 297         .get_boot_time          = maple_get_boot_time,
 298         .set_rtc_time           = maple_set_rtc_time,
 299         .get_rtc_time           = maple_get_rtc_time,
 300         .calibrate_decr         = generic_calibrate_decr,
 301         .progress               = maple_progress,
 302         .idle_loop              = native_idle,
 303 };