arch/powerpc/platforms/cell/setup.c

   1 /*
   2  *  linux/arch/powerpc/platforms/cell/cell_setup.c
   3  *
   4  *  Copyright (C) 1995  Linus Torvalds
   5  *  Adapted from 'alpha' version by Gary Thomas
   6  *  Modified by Cort Dougan (cort@cs.nmt.edu)
   7  *  Modified by PPC64 Team, IBM Corp
   8  *  Modified by Cell Team, IBM Deutschland Entwicklung GmbH
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version
  13  * 2 of the License, or (at your option) any later version.
  14  */
  15 #undef DEBUG
  16
  17 #include <linux/config.h>
  18 #include <linux/sched.h>
  19 #include <linux/kernel.h>
  20 #include <linux/mm.h>
  21 #include <linux/stddef.h>
  22 #include <linux/unistd.h>
  23 #include <linux/slab.h>
  24 #include <linux/user.h>
  25 #include <linux/reboot.h>
  26 #include <linux/init.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #include <linux/seq_file.h>
  30 #include <linux/root_dev.h>
  31 #include <linux/console.h>
  32
  33 #include <asm/mmu.h>
  34 #include <asm/processor.h>
  35 #include <asm/io.h>
  36 #include <asm/kexec.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/prom.h>
  39 #include <asm/rtas.h>
  40 #include <asm/pci-bridge.h>
  41 #include <asm/iommu.h>
  42 #include <asm/dma.h>
  43 #include <asm/machdep.h>
  44 #include <asm/time.h>
  45 #include <asm/nvram.h>
  46 #include <asm/cputable.h>
  47 #include <asm/ppc-pci.h>
  48 #include <asm/irq.h>
  49
  50 #include "interrupt.h"
  51 #include "iommu.h"
  52 #include "pervasive.h"
  53
  54 #ifdef DEBUG
  55 #define DBG(fmt...) udbg_printf(fmt)
  56 #else
  57 #define DBG(fmt...)
  58 #endif
  59
  60 static void cell_show_cpuinfo(struct seq_file *m)
  61 {
  62         struct device_node *root;
  63         const char *model = "";
  64
  65         root = of_find_node_by_path("/");
  66         if (root)
  67                 model = get_property(root, "model", NULL);
  68         seq_printf(m, "machine\t\t: CHRP %s\n", model);
  69         of_node_put(root);
  70 }
  71
  72 #ifdef CONFIG_SPARSEMEM
  73 static int __init find_spu_node_id(struct device_node *spe)
  74 {
  75         unsigned int *id;
  76 #ifdef CONFIG_NUMA
  77         struct device_node *cpu;
  78         cpu = spe->parent->parent;
  79         id = (unsigned int *)get_property(cpu, "node-id", NULL);
  80 #else
  81         id = NULL;
  82 #endif
  83         return id ? *id : 0;
  84 }
  85
  86 static void __init cell_spuprop_present(struct device_node *spe,
  87                                        const char *prop, int early)
  88 {
  89         struct address_prop {
  90                 unsigned long address;
  91                 unsigned int len;
  92         } __attribute__((packed)) *p;
  93         int proplen;
  94
  95         unsigned long start_pfn, end_pfn, pfn;
  96         int node_id;
  97
  98         p = (void*)get_property(spe, prop, &proplen);
  99         WARN_ON(proplen != sizeof (*p));
 100
 101         node_id = find_spu_node_id(spe);
 102
 103         start_pfn = p->address >> PAGE_SHIFT;
 104         end_pfn = (p->address + p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
 105
 106         /* We need to call memory_present *before* the call to sparse_init,
 107            but we can initialize the page structs only *after* that call.
 108            Thus, we're being called twice. */
 109         if (early)
 110                 memory_present(node_id, start_pfn, end_pfn);
 111         else {
 112                 /* As the pages backing SPU LS and I/O are outside the range
 113                    of regular memory, their page structs were not initialized
 114                    by free_area_init. Do it here instead. */
 115                 for (pfn = start_pfn; pfn < end_pfn; pfn++) {
 116                         struct page *page = pfn_to_page(pfn);
 117                         set_page_links(page, ZONE_DMA, node_id, pfn);
 118                         set_page_count(page, 1);
 119                         reset_page_mapcount(page);
 120                         SetPageReserved(page);
 121                         INIT_LIST_HEAD(&page->lru);
 122                 }
 123         }
 124 }
 125
 126 static void __init cell_spumem_init(int early)
 127 {
 128         struct device_node *node;
 129         for (node = of_find_node_by_type(NULL, "spe");
 130                         node; node = of_find_node_by_type(node, "spe")) {
 131                 cell_spuprop_present(node, "local-store", early);
 132                 cell_spuprop_present(node, "problem", early);
 133                 cell_spuprop_present(node, "priv1", early);
 134                 cell_spuprop_present(node, "priv2", early);
 135         }
 136 }
 137 #else
 138 static void __init cell_spumem_init(int early)
 139 {
 140 }
 141 #endif
 142
 143 static void cell_progress(char *s, unsigned short hex)
 144 {
 145         printk("*** %04x : %s\n", hex, s ? s : "");
 146 }
 147
 148 static void __init cell_setup_arch(void)
 149 {
 150         ppc_md.init_IRQ       = iic_init_IRQ;
 151         ppc_md.get_irq        = iic_get_irq;
 152
 153 #ifdef CONFIG_SMP
 154         smp_init_cell();
 155 #endif
 156
 157         /* init to some ~sane value until calibrate_delay() runs */
 158         loops_per_jiffy = 50000000;
 159
 160         if (ROOT_DEV == 0) {
 161                 printk("No ramdisk, default root is /dev/hda2\n");
 162                 ROOT_DEV = Root_HDA2;
 163         }
 164
 165         /* Find and initialize PCI host bridges */
 166         init_pci_config_tokens();
 167         find_and_init_phbs();
 168         spider_init_IRQ();
 169         cell_pervasive_init();
 170 #ifdef CONFIG_DUMMY_CONSOLE
 171         conswitchp = &dummy_con;
 172 #endif
 173
 174         mmio_nvram_init();
 175
 176         cell_spumem_init(0);
 177 }
 178
 179 /*
 180  * Early initialization.  Relocation is on but do not reference unbolted pages
 181  */
 182 static void __init cell_init_early(void)
 183 {
 184         DBG(" -> cell_init_early()\n");
 185
 186         hpte_init_native();
 187
 188         cell_init_iommu();
 189
 190         ppc64_interrupt_controller = IC_CELL_PIC;
 191
 192         cell_spumem_init(1);
 193
 194         DBG(" <- cell_init_early()\n");
 195 }
 196
 197
 198 static int __init cell_probe(int platform)
 199 {
 200         if (platform != PLATFORM_CELL)
 201                 return 0;
 202
 203         return 1;
 204 }
 205
 206 /*
 207  * Cell has no legacy IO; anything calling this function has to
 208  * fail or bad things will happen
 209  */
 210 static int cell_check_legacy_ioport(unsigned int baseport)
 211 {
 212         return -ENODEV;
 213 }
 214
 215 struct machdep_calls __initdata cell_md = {
 216         .probe                  = cell_probe,
 217         .setup_arch             = cell_setup_arch,
 218         .init_early             = cell_init_early,
 219         .show_cpuinfo           = cell_show_cpuinfo,
 220         .restart                = rtas_restart,
 221         .power_off              = rtas_power_off,
 222         .halt                   = rtas_halt,
 223         .get_boot_time          = rtas_get_boot_time,
 224         .get_rtc_time           = rtas_get_rtc_time,
 225         .set_rtc_time           = rtas_set_rtc_time,
 226         .calibrate_decr         = generic_calibrate_decr,
 227         .check_legacy_ioport    = cell_check_legacy_ioport,
 228         .progress               = cell_progress,
 229 #ifdef CONFIG_KEXEC
 230         .machine_kexec          = default_machine_kexec,
 231         .machine_kexec_prepare  = default_machine_kexec_prepare,
 232         .machine_crash_shutdown = default_machine_crash_shutdown,
 233 #endif
 234 };