arch/i386/mach-voyager/setup.c

   1 /*
   2  *      Machine specific setup for generic
   3  */
   4
   5 #include <linux/config.h>
   6 #include <linux/init.h>
   7 #include <linux/interrupt.h>
   8 #include <asm/arch_hooks.h>
   9 #include <asm/voyager.h>
  10 #include <asm/e820.h>
  11 #include <asm/io.h>
  12 #include <asm/setup.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 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
  23
  24 void __init intr_init_hook(void)
  25 {
  26 #ifdef CONFIG_SMP
  27         smp_intr_init();
  28 #endif
  29
  30         setup_irq(2, &irq2);
  31 }
  32
  33 void __init pre_setup_arch_hook(void)
  34 {
  35         /* Voyagers run their CPUs from independent clocks, so disable
  36          * the TSC code because we can't sync them */
  37         tsc_disable = 1;
  38 }
  39
  40 void __init trap_init_hook(void)
  41 {
  42 }
  43
  44 static struct irqaction irq0  = { timer_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "timer", NULL, NULL};
  45
  46 void __init time_init_hook(void)
  47 {
  48         setup_irq(0, &irq0);
  49 }
  50
  51 /* Hook for machine specific memory setup. */
  52
  53 char * __init machine_specific_memory_setup(void)
  54 {
  55         char *who;
  56
  57         who = "NOT VOYAGER";
  58
  59         if(voyager_level == 5) {
  60                 __u32 addr, length;
  61                 int i;
  62
  63                 who = "Voyager-SUS";
  64
  65                 e820.nr_map = 0;
  66                 for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
  67                         add_memory_region(addr, length, E820_RAM);
  68                 }
  69                 return who;
  70         } else if(voyager_level == 4) {
  71                 __u32 tom;
  72                 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
  73                 /* select the DINO config space */
  74                 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
  75                 /* Read DINO top of memory register */
  76                 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
  77                         + ((inb(catbase + 0x5) & 0x7f) << 24);
  78
  79                 if(inb(catbase) != VOYAGER_DINO) {
  80                         printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
  81                         tom = (EXT_MEM_K)<<10;
  82                 }
  83                 who = "Voyager-TOM";
  84                 add_memory_region(0, 0x9f000, E820_RAM);
  85                 /* map from 1M to top of memory */
  86                 add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
  87                 /* FIXME: Should check the ASICs to see if I need to
  88                  * take out the 8M window.  Just do it at the moment
  89                  * */
  90                 add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
  91                 return who;
  92         }
  93
  94         who = "BIOS-e820";
  95
  96         /*
  97          * Try to copy the BIOS-supplied E820-map.
  98          *
  99          * Otherwise fake a memory map; one section from 0k->640k,
 100          * the next section from 1mb->appropriate_mem_k
 101          */
 102         sanitize_e820_map(E820_MAP, &E820_MAP_NR);
 103         if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
 104                 unsigned long mem_size;
 105
 106                 /* compare results from other methods and take the greater */
 107                 if (ALT_MEM_K < EXT_MEM_K) {
 108                         mem_size = EXT_MEM_K;
 109                         who = "BIOS-88";
 110                 } else {
 111                         mem_size = ALT_MEM_K;
 112                         who = "BIOS-e801";
 113                 }
 114
 115                 e820.nr_map = 0;
 116                 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
 117                 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
 118         }
 119         return who;
 120 }