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
  53 #ifdef DEBUG
  54 #define DBG(fmt...) udbg_printf(fmt)
  55 #else
  56 #define DBG(fmt...)
  57 #endif
  58
  59 void cell_show_cpuinfo(struct seq_file *m)
  60 {
  61         struct device_node *root;
  62         const char *model = "";
  63
  64         root = of_find_node_by_path("/");
  65         if (root)
  66                 model = get_property(root, "model", NULL);
  67         seq_printf(m, "machine\t\t: CHRP %s\n", model);
  68         of_node_put(root);
  69 }
  70
  71 #ifdef CONFIG_SPARSEMEM
  72 static int __init find_spu_node_id(struct device_node *spe)
  73 {
  74         unsigned int *id;
  75 #ifdef CONFIG_NUMA
  76         struct device_node *cpu;
  77         cpu = spe->parent->parent;
  78         id = (unsigned int *)get_property(cpu, "node-id", NULL);
  79 #else
  80         id = NULL;
  81 #endif
  82         return id ? *id : 0;
  83 }
  84
  85 static void __init cell_spuprop_present(struct device_node *spe,
  86                                        const char *prop, int early)
  87 {
  88         struct address_prop {
  89                 unsigned long address;
  90                 unsigned int len;
  91         } __attribute__((packed)) *p;
  92         int proplen;
  93
  94         unsigned long start_pfn, end_pfn, pfn;
  95         int node_id;
  96
  97         p = (void*)get_property(spe, prop, &proplen);
  98         WARN_ON(proplen != sizeof (*p));
  99
 100         node_id = find_spu_node_id(spe);
 101
 102         start_pfn = p->address >> PAGE_SHIFT;
 103         end_pfn = (p->address + p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
 104
 105         /* We need to call memory_present *before* the call to sparse_init,
 106            but we can initialize the page structs only *after* that call.
 107            Thus, we're being called twice. */
 108         if (early)
 109                 memory_present(node_id, start_pfn, end_pfn);
 110         else {
 111                 /* As the pages backing SPU LS and I/O are outside the range
 112                    of regular memory, their page structs were not initialized
 113                    by free_area_init. Do it here instead. */
 114                 for (pfn = start_pfn; pfn < end_pfn; pfn++) {
 115                         struct page *page = pfn_to_page(pfn);
 116                         set_page_links(page, ZONE_DMA, node_id, pfn);
 117                         set_page_count(page, 0);
 118                         reset_page_mapcount(page);
 119                         SetPageReserved(page);
 120                         INIT_LIST_HEAD(&page->lru);
 121                 }
 122         }
 123 }
 124
 125 static void __init cell_spumem_init(int early)
 126 {
 127         struct device_node *node;
 128         for (node = of_find_node_by_type(NULL, "spe");
 129                         node; node = of_find_node_by_type(node, "spe")) {
 130                 cell_spuprop_present(node, "local-store", early);
 131                 cell_spuprop_present(node, "problem", early);
 132                 cell_spuprop_present(node, "priv1", early);
 133                 cell_spuprop_present(node, "priv2", early);
 134         }
 135 }
 136 #else
 137 static void __init cell_spumem_init(int early)
 138 {
 139 }
 140 #endif
 141
 142 static void cell_progress(char *s, unsigned short hex)
 143 {
 144         printk("*** %04x : %s\n", hex, s ? s : "");
 145 }
 146
 147 static void __init cell_setup_arch(void)
 148 {
 149         ppc_md.init_IRQ       = iic_init_IRQ;
 150         ppc_md.get_irq        = iic_get_irq;
 151
 152 #ifdef CONFIG_SMP
 153         smp_init_cell();
 154 #endif
 155
 156         /* init to some ~sane value until calibrate_delay() runs */
 157         loops_per_jiffy = 50000000;
 158
 159         if (ROOT_DEV == 0) {
 160                 printk("No ramdisk, default root is /dev/hda2\n");
 161                 ROOT_DEV = Root_HDA2;
 162         }
 163
 164         /* Find and initialize PCI host bridges */
 165         init_pci_config_tokens();
 166         find_and_init_phbs();
 167         spider_init_IRQ();
 168 #ifdef CONFIG_DUMMY_CONSOLE
 169         conswitchp = &dummy_con;
 170 #endif
 171
 172         mmio_nvram_init();
 173
 174         cell_spumem_init(0);
 175 }
 176
 177 /*
 178  * Early initialization.  Relocation is on but do not reference unbolted pages
 179  */
 180 static void __init cell_init_early(void)
 181 {
 182         DBG(" -> cell_init_early()\n");
 183
 184         hpte_init_native();
 185
 186         cell_init_iommu();
 187
 188         ppc64_interrupt_controller = IC_CELL_PIC;
 189
 190         cell_spumem_init(1);
 191
 192         DBG(" <- cell_init_early()\n");
 193 }
 194
 195
 196 static int __init cell_probe(int platform)
 197 {
 198         if (platform != PLATFORM_CELL)
 199                 return 0;
 200
 201         return 1;
 202 }
 203
 204 struct machdep_calls __initdata cell_md = {
 205         .probe                  = cell_probe,
 206         .setup_arch             = cell_setup_arch,
 207         .init_early             = cell_init_early,
 208         .show_cpuinfo           = cell_show_cpuinfo,
 209         .restart                = rtas_restart,
 210         .power_off              = rtas_power_off,
 211         .halt                   = rtas_halt,
 212         .get_boot_time          = rtas_get_boot_time,
 213         .get_rtc_time           = rtas_get_rtc_time,
 214         .set_rtc_time           = rtas_set_rtc_time,
 215         .calibrate_decr         = generic_calibrate_decr,
 216         .progress               = cell_progress,
 217 #ifdef CONFIG_KEXEC
 218         .machine_kexec          = default_machine_kexec,
 219         .machine_kexec_prepare  = default_machine_kexec_prepare,
 220         .machine_crash_shutdown = default_machine_crash_shutdown,
 221 #endif
 222 };