arch/ppc64/kernel/maple_setup.c

   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 #include <asm/mpic.h>
  63
  64 #ifdef DEBUG
  65 #define DBG(fmt...) udbg_printf(fmt)
  66 #else
  67 #define DBG(fmt...)
  68 #endif
  69
  70 extern int maple_set_rtc_time(struct rtc_time *tm);
  71 extern void maple_get_rtc_time(struct rtc_time *tm);
  72 extern void maple_get_boot_time(struct rtc_time *tm);
  73 extern void maple_calibrate_decr(void);
  74 extern void maple_pci_init(void);
  75 extern void maple_pcibios_fixup(void);
  76 extern int maple_pci_get_legacy_ide_irq(struct pci_dev *dev, int channel);
  77 extern void generic_find_legacy_serial_ports(u64 *physport,
  78                 unsigned int *default_speed);
  79
  80 static void maple_restart(char *cmd)
  81 {
  82         unsigned int maple_nvram_base;
  83         unsigned int maple_nvram_offset;
  84         unsigned int maple_nvram_command;
  85         struct device_node *rtcs;
  86
  87         /* find NVRAM device */
  88         rtcs = find_compatible_devices("nvram", "AMD8111");
  89         if (rtcs && rtcs->addrs) {
  90                 maple_nvram_base = rtcs->addrs[0].address;
  91         } else {
  92                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
  93                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
  94                 return;
  95         }
  96
  97         /* find service processor device */
  98         rtcs = find_devices("service-processor");
  99         if (!rtcs) {
 100                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 101                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
 102                 return;
 103         }
 104         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 105                         "restart-addr", NULL);
 106         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 107                         "restart-value", NULL);
 108
 109         /* send command */
 110         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 111         for (;;) ;
 112 }
 113
 114 static void maple_power_off(void)
 115 {
 116         unsigned int maple_nvram_base;
 117         unsigned int maple_nvram_offset;
 118         unsigned int maple_nvram_command;
 119         struct device_node *rtcs;
 120
 121         /* find NVRAM device */
 122         rtcs = find_compatible_devices("nvram", "AMD8111");
 123         if (rtcs && rtcs->addrs) {
 124                 maple_nvram_base = rtcs->addrs[0].address;
 125         } else {
 126                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
 127                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 128                 return;
 129         }
 130
 131         /* find service processor device */
 132         rtcs = find_devices("service-processor");
 133         if (!rtcs) {
 134                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 135                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 136                 return;
 137         }
 138         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 139                         "power-off-addr", NULL);
 140         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 141                         "power-off-value", NULL);
 142
 143         /* send command */
 144         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 145         for (;;) ;
 146 }
 147
 148 static void maple_halt(void)
 149 {
 150         maple_power_off();
 151 }
 152
 153 #ifdef CONFIG_SMP
 154 struct smp_ops_t maple_smp_ops = {
 155         .probe          = smp_mpic_probe,
 156         .message_pass   = smp_mpic_message_pass,
 157         .kick_cpu       = smp_generic_kick_cpu,
 158         .setup_cpu      = smp_mpic_setup_cpu,
 159         .give_timebase  = smp_generic_give_timebase,
 160         .take_timebase  = smp_generic_take_timebase,
 161 };
 162 #endif /* CONFIG_SMP */
 163
 164 void __init maple_setup_arch(void)
 165 {
 166         /* init to some ~sane value until calibrate_delay() runs */
 167         loops_per_jiffy = 50000000;
 168
 169         /* Setup SMP callback */
 170 #ifdef CONFIG_SMP
 171         smp_ops = &maple_smp_ops;
 172 #endif
 173         /* Lookup PCI hosts */
 174         maple_pci_init();
 175
 176 #ifdef CONFIG_DUMMY_CONSOLE
 177         conswitchp = &dummy_con;
 178 #endif
 179
 180         printk(KERN_INFO "Using native/NAP idle loop\n");
 181 }
 182
 183 /*
 184  * Early initialization.
 185  */
 186 static void __init maple_init_early(void)
 187 {
 188         unsigned int default_speed;
 189         u64 physport;
 190
 191         DBG(" -> maple_init_early\n");
 192
 193         /* Initialize hash table, from now on, we can take hash faults
 194          * and call ioremap
 195          */
 196         hpte_init_native();
 197
 198         /* Find the serial port */
 199         generic_find_legacy_serial_ports(&physport, &default_speed);
 200
 201         DBG("phys port addr: %lx\n", (long)physport);
 202
 203         if (physport) {
 204                 void *comport;
 205                 /* Map the uart for udbg. */
 206                 comport = (void *)ioremap(physport, 16);
 207                 udbg_init_uart(comport, default_speed);
 208
 209                 DBG("Hello World !\n");
 210         }
 211
 212         /* Setup interrupt mapping options */
 213         ppc64_interrupt_controller = IC_OPEN_PIC;
 214
 215         iommu_init_early_u3();
 216
 217         DBG(" <- maple_init_early\n");
 218 }
 219
 220
 221 static __init void maple_init_IRQ(void)
 222 {
 223         struct device_node *root;
 224         unsigned int *opprop;
 225         unsigned long opic_addr;
 226         struct mpic *mpic;
 227         unsigned char senses[128];
 228         int n;
 229
 230         DBG(" -> maple_init_IRQ\n");
 231
 232         /* XXX: Non standard, replace that with a proper openpic/mpic node
 233          * in the device-tree. Find the Open PIC if present */
 234         root = of_find_node_by_path("/");
 235         opprop = (unsigned int *) get_property(root,
 236                                 "platform-open-pic", NULL);
 237         if (opprop == 0)
 238                 panic("OpenPIC not found !\n");
 239
 240         n = prom_n_addr_cells(root);
 241         for (opic_addr = 0; n > 0; --n)
 242                 opic_addr = (opic_addr << 32) + *opprop++;
 243         of_node_put(root);
 244
 245         /* Obtain sense values from device-tree */
 246         prom_get_irq_senses(senses, 0, 128);
 247
 248         mpic = mpic_alloc(opic_addr,
 249                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
 250                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
 251                           0, 0, 128, 128, senses, 128, "U3-MPIC");
 252         BUG_ON(mpic == NULL);
 253         mpic_init(mpic);
 254
 255         DBG(" <- maple_init_IRQ\n");
 256 }
 257
 258 static void __init maple_progress(char *s, unsigned short hex)
 259 {
 260         printk("*** %04x : %s\n", hex, s ? s : "");
 261 }
 262
 263
 264 /*
 265  * Called very early, MMU is off, device-tree isn't unflattened
 266  */
 267 static int __init maple_probe(int platform)
 268 {
 269         if (platform != PLATFORM_MAPLE)
 270                 return 0;
 271         /*
 272          * On U3, the DART (iommu) must be allocated now since it
 273          * has an impact on htab_initialize (due to the large page it
 274          * occupies having to be broken up so the DART itself is not
 275          * part of the cacheable linar mapping
 276          */
 277         alloc_u3_dart_table();
 278
 279         return 1;
 280 }
 281
 282 struct machdep_calls __initdata maple_md = {
 283         .probe                  = maple_probe,
 284         .setup_arch             = maple_setup_arch,
 285         .init_early             = maple_init_early,
 286         .init_IRQ               = maple_init_IRQ,
 287         .get_irq                = mpic_get_irq,
 288         .pcibios_fixup          = maple_pcibios_fixup,
 289         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
 290         .restart                = maple_restart,
 291         .power_off              = maple_power_off,
 292         .halt                   = maple_halt,
 293         .get_boot_time          = maple_get_boot_time,
 294         .set_rtc_time           = maple_set_rtc_time,
 295         .get_rtc_time           = maple_get_rtc_time,
 296         .calibrate_decr         = generic_calibrate_decr,
 297         .progress               = maple_progress,
 298         .idle_loop              = native_idle,
 299 };