git.oblomov.eu Git - linux-2.6/blob - arch/x86/mach-voyager/setup.c

   1 /*
   2  *      Machine specific setup for generic
   3  */
   4
   5 #include <linux/init.h>
   6 #include <linux/interrupt.h>
   7 #include <asm/arch_hooks.h>
   8 #include <asm/voyager.h>
   9 #include <asm/e820.h>
  10 #include <asm/io.h>
  11 #include <asm/setup.h>
  12 #include <asm/cpu.h>
  13
  14 void __init pre_intr_init_hook(void)
  15 {
  16         init_ISA_irqs();
  17 }
  18
  19 /*
  20  * IRQ2 is cascade interrupt to second interrupt controller
  21  */
  22 static struct irqaction irq2 = {
  23         .handler = no_action,
  24         .mask = CPU_MASK_NONE,
  25         .name = "cascade",
  26 };
  27
  28 void __init intr_init_hook(void)
  29 {
  30 #ifdef CONFIG_SMP
  31         voyager_smp_intr_init();
  32 #endif
  33
  34         setup_irq(2, &irq2);
  35 }
  36
  37 static void voyager_disable_tsc(void)
  38 {
  39         /* Voyagers run their CPUs from independent clocks, so disable
  40          * the TSC code because we can't sync them */
  41         setup_clear_cpu_cap(X86_FEATURE_TSC);
  42 }
  43
  44 void __init pre_setup_arch_hook(void)
  45 {
  46         voyager_disable_tsc();
  47 }
  48
  49 void __init pre_time_init_hook(void)
  50 {
  51         voyager_disable_tsc();
  52 }
  53
  54 void __init trap_init_hook(void)
  55 {
  56 }
  57
  58 static struct irqaction irq0 = {
  59         .handler = timer_interrupt,
  60         .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
  61         .mask = CPU_MASK_NONE,
  62         .name = "timer"
  63 };
  64
  65 void __init time_init_hook(void)
  66 {
  67         irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
  68         setup_irq(0, &irq0);
  69 }
  70
  71 /* Hook for machine specific memory setup. */
  72
  73 char *__init machine_specific_memory_setup(void)
  74 {
  75         char *who;
  76         int new_nr;
  77
  78         who = "NOT VOYAGER";
  79
  80         if (voyager_level == 5) {
  81                 __u32 addr, length;
  82                 int i;
  83
  84                 who = "Voyager-SUS";
  85
  86                 e820.nr_map = 0;
  87                 for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
  88                         e820_add_region(addr, length, E820_RAM);
  89                 }
  90                 return who;
  91         } else if (voyager_level == 4) {
  92                 __u32 tom;
  93                 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT) << 8;
  94                 /* select the DINO config space */
  95                 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
  96                 /* Read DINO top of memory register */
  97                 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
  98                     + ((inb(catbase + 0x5) & 0x7f) << 24);
  99
 100                 if (inb(catbase) != VOYAGER_DINO) {
 101                         printk(KERN_ERR
 102                                "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
 103                         tom = (boot_params.screen_info.ext_mem_k) << 10;
 104                 }
 105                 who = "Voyager-TOM";
 106                 e820_add_region(0, 0x9f000, E820_RAM);
 107                 /* map from 1M to top of memory */
 108                 e820_add_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
 109                                   E820_RAM);
 110                 /* FIXME: Should check the ASICs to see if I need to
 111                  * take out the 8M window.  Just do it at the moment
 112                  * */
 113                 e820_add_region(8 * 1024 * 1024, 8 * 1024 * 1024,
 114                                   E820_RESERVED);
 115                 return who;
 116         }
 117
 118         return default_machine_specific_memory_setup();
 119 }