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
  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
  82 static void maple_restart(char *cmd)
  83 {
  84 }
  85
  86 static void maple_power_off(void)
  87 {
  88 }
  89
  90 static void maple_halt(void)
  91 {
  92 }
  93
  94 #ifdef CONFIG_SMP
  95 struct smp_ops_t maple_smp_ops = {
  96         .probe          = smp_mpic_probe,
  97         .message_pass   = smp_mpic_message_pass,
  98         .kick_cpu       = smp_generic_kick_cpu,
  99         .setup_cpu      = smp_mpic_setup_cpu,
 100         .give_timebase  = smp_generic_give_timebase,
 101         .take_timebase  = smp_generic_take_timebase,
 102 };
 103 #endif /* CONFIG_SMP */
 104
 105 void __init maple_setup_arch(void)
 106 {
 107         /* init to some ~sane value until calibrate_delay() runs */
 108         loops_per_jiffy = 50000000;
 109
 110         /* Setup SMP callback */
 111 #ifdef CONFIG_SMP
 112         smp_ops = &maple_smp_ops;
 113 #endif
 114         /* Lookup PCI hosts */
 115         maple_pci_init();
 116
 117 #ifdef CONFIG_DUMMY_CONSOLE
 118         conswitchp = &dummy_con;
 119 #endif
 120 }
 121
 122 /*
 123  * Early initialization.
 124  */
 125 static void __init maple_init_early(void)
 126 {
 127         unsigned int default_speed;
 128         u64 physport;
 129
 130         DBG(" -> maple_init_early\n");
 131
 132         /* Initialize hash table, from now on, we can take hash faults
 133          * and call ioremap
 134          */
 135         hpte_init_native();
 136
 137         /* Find the serial port */
 138         generic_find_legacy_serial_ports(&physport, &default_speed);
 139
 140         DBG("phys port addr: %lx\n", (long)physport);
 141
 142         if (physport) {
 143                 void *comport;
 144                 /* Map the uart for udbg. */
 145                 comport = (void *)__ioremap(physport, 16, _PAGE_NO_CACHE);
 146                 udbg_init_uart(comport, default_speed);
 147
 148                 ppc_md.udbg_putc = udbg_putc;
 149                 ppc_md.udbg_getc = udbg_getc;
 150                 ppc_md.udbg_getc_poll = udbg_getc_poll;
 151                 DBG("Hello World !\n");
 152         }
 153
 154         /* Setup interrupt mapping options */
 155         ppc64_interrupt_controller = IC_OPEN_PIC;
 156
 157         iommu_init_early_u3();
 158
 159         DBG(" <- maple_init_early\n");
 160 }
 161
 162
 163 static __init void maple_init_IRQ(void)
 164 {
 165         struct device_node *root;
 166         unsigned int *opprop;
 167         unsigned long opic_addr;
 168         struct mpic *mpic;
 169         unsigned char senses[128];
 170         int n;
 171
 172         DBG(" -> maple_init_IRQ\n");
 173
 174         /* XXX: Non standard, replace that with a proper openpic/mpic node
 175          * in the device-tree. Find the Open PIC if present */
 176         root = of_find_node_by_path("/");
 177         opprop = (unsigned int *) get_property(root,
 178                                 "platform-open-pic", NULL);
 179         if (opprop == 0)
 180                 panic("OpenPIC not found !\n");
 181
 182         n = prom_n_addr_cells(root);
 183         for (opic_addr = 0; n > 0; --n)
 184                 opic_addr = (opic_addr << 32) + *opprop++;
 185         of_node_put(root);
 186
 187         /* Obtain sense values from device-tree */
 188         prom_get_irq_senses(senses, 0, 128);
 189
 190         mpic = mpic_alloc(opic_addr,
 191                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
 192                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
 193                           0, 0, 128, 128, senses, 128, "U3-MPIC");
 194         BUG_ON(mpic == NULL);
 195         mpic_init(mpic);
 196
 197         DBG(" <- maple_init_IRQ\n");
 198 }
 199
 200 static void __init maple_progress(char *s, unsigned short hex)
 201 {
 202         printk("*** %04x : %s\n", hex, s ? s : "");
 203 }
 204
 205
 206 /*
 207  * Called very early, MMU is off, device-tree isn't unflattened
 208  */
 209 static int __init maple_probe(int platform)
 210 {
 211         if (platform != PLATFORM_MAPLE)
 212                 return 0;
 213         /*
 214          * On U3, the DART (iommu) must be allocated now since it
 215          * has an impact on htab_initialize (due to the large page it
 216          * occupies having to be broken up so the DART itself is not
 217          * part of the cacheable linar mapping
 218          */
 219         alloc_u3_dart_table();
 220
 221         return 1;
 222 }
 223
 224 struct machdep_calls __initdata maple_md = {
 225         .probe                  = maple_probe,
 226         .setup_arch             = maple_setup_arch,
 227         .init_early             = maple_init_early,
 228         .init_IRQ               = maple_init_IRQ,
 229         .get_irq                = mpic_get_irq,
 230         .pcibios_fixup          = maple_pcibios_fixup,
 231         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
 232         .restart                = maple_restart,
 233         .power_off              = maple_power_off,
 234         .halt                   = maple_halt,
 235         .get_boot_time          = maple_get_boot_time,
 236         .set_rtc_time           = maple_set_rtc_time,
 237         .get_rtc_time           = maple_get_rtc_time,
 238         .calibrate_decr         = maple_calibrate_decr,
 239         .progress               = maple_progress,
 240 };