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
  13 void __init pre_intr_init_hook(void)
  14 {
  15         init_ISA_irqs();
  16 }
  17
  18 /*
  19  * IRQ2 is cascade interrupt to second interrupt controller
  20  */
  21 static struct irqaction irq2 = {
  22         .handler = no_action,
  23         .mask = CPU_MASK_NONE,
  24         .name = "cascade",
  25 };
  26
  27 void __init intr_init_hook(void)
  28 {
  29 #ifdef CONFIG_SMP
  30         smp_intr_init();
  31 #endif
  32
  33         setup_irq(2, &irq2);
  34 }
  35
  36 void __init pre_setup_arch_hook(void)
  37 {
  38         /* Voyagers run their CPUs from independent clocks, so disable
  39          * the TSC code because we can't sync them */
  40         setup_clear_cpu_cap(X86_FEATURE_TSC);
  41 }
  42
  43 void __init trap_init_hook(void)
  44 {
  45 }
  46
  47 static struct irqaction irq0 = {
  48         .handler = timer_interrupt,
  49         .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
  50         .mask = CPU_MASK_NONE,
  51         .name = "timer"
  52 };
  53
  54 void __init time_init_hook(void)
  55 {
  56         irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
  57         setup_irq(0, &irq0);
  58 }
  59
  60 /* Hook for machine specific memory setup. */
  61
  62 char *__init machine_specific_memory_setup(void)
  63 {
  64         char *who;
  65
  66         who = "NOT VOYAGER";
  67
  68         if (voyager_level == 5) {
  69                 __u32 addr, length;
  70                 int i;
  71
  72                 who = "Voyager-SUS";
  73
  74                 e820.nr_map = 0;
  75                 for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
  76                         add_memory_region(addr, length, E820_RAM);
  77                 }
  78                 return who;
  79         } else if (voyager_level == 4) {
  80                 __u32 tom;
  81                 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT) << 8;
  82                 /* select the DINO config space */
  83                 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
  84                 /* Read DINO top of memory register */
  85                 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
  86                     + ((inb(catbase + 0x5) & 0x7f) << 24);
  87
  88                 if (inb(catbase) != VOYAGER_DINO) {
  89                         printk(KERN_ERR
  90                                "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
  91                         tom = (boot_params.screen_info.ext_mem_k) << 10;
  92                 }
  93                 who = "Voyager-TOM";
  94                 add_memory_region(0, 0x9f000, E820_RAM);
  95                 /* map from 1M to top of memory */
  96                 add_memory_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
  97                                   E820_RAM);
  98                 /* FIXME: Should check the ASICs to see if I need to
  99                  * take out the 8M window.  Just do it at the moment
 100                  * */
 101                 add_memory_region(8 * 1024 * 1024, 8 * 1024 * 1024,
 102                                   E820_RESERVED);
 103                 return who;
 104         }
 105
 106         who = "BIOS-e820";
 107
 108         /*
 109          * Try to copy the BIOS-supplied E820-map.
 110          *
 111          * Otherwise fake a memory map; one section from 0k->640k,
 112          * the next section from 1mb->appropriate_mem_k
 113          */
 114         sanitize_e820_map(boot_params.e820_map, &boot_params.e820_entries);
 115         if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries)
 116             < 0) {
 117                 unsigned long mem_size;
 118
 119                 /* compare results from other methods and take the greater */
 120                 if (boot_params.alt_mem_k < boot_params.screen_info.ext_mem_k) {
 121                         mem_size = boot_params.screen_info.ext_mem_k;
 122                         who = "BIOS-88";
 123                 } else {
 124                         mem_size = boot_params.alt_mem_k;
 125                         who = "BIOS-e801";
 126                 }
 127
 128                 e820.nr_map = 0;
 129                 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
 130                 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
 131         }
 132         return who;
 133 }