arch/i386/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 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
  22
  23 void __init intr_init_hook(void)
  24 {
  25 #ifdef CONFIG_SMP
  26         smp_intr_init();
  27 #endif
  28
  29         setup_irq(2, &irq2);
  30 }
  31
  32 void __init pre_setup_arch_hook(void)
  33 {
  34         /* Voyagers run their CPUs from independent clocks, so disable
  35          * the TSC code because we can't sync them */
  36         tsc_disable = 1;
  37 }
  38
  39 void __init trap_init_hook(void)
  40 {
  41 }
  42
  43 static struct irqaction irq0  = {
  44         .handler = timer_interrupt,
  45         .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
  46         .mask = CPU_MASK_NONE,
  47         .name = "timer"
  48 };
  49
  50 void __init time_init_hook(void)
  51 {
  52         irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
  53         setup_irq(0, &irq0);
  54 }
  55
  56 /* Hook for machine specific memory setup. */
  57
  58 char * __init machine_specific_memory_setup(void)
  59 {
  60         char *who;
  61
  62         who = "NOT VOYAGER";
  63
  64         if(voyager_level == 5) {
  65                 __u32 addr, length;
  66                 int i;
  67
  68                 who = "Voyager-SUS";
  69
  70                 e820.nr_map = 0;
  71                 for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
  72                         add_memory_region(addr, length, E820_RAM);
  73                 }
  74                 return who;
  75         } else if(voyager_level == 4) {
  76                 __u32 tom;
  77                 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
  78                 /* select the DINO config space */
  79                 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
  80                 /* Read DINO top of memory register */
  81                 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
  82                         + ((inb(catbase + 0x5) & 0x7f) << 24);
  83
  84                 if(inb(catbase) != VOYAGER_DINO) {
  85                         printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
  86                         tom = (EXT_MEM_K)<<10;
  87                 }
  88                 who = "Voyager-TOM";
  89                 add_memory_region(0, 0x9f000, E820_RAM);
  90                 /* map from 1M to top of memory */
  91                 add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
  92                 /* FIXME: Should check the ASICs to see if I need to
  93                  * take out the 8M window.  Just do it at the moment
  94                  * */
  95                 add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
  96                 return who;
  97         }
  98
  99         who = "BIOS-e820";
 100
 101         /*
 102          * Try to copy the BIOS-supplied E820-map.
 103          *
 104          * Otherwise fake a memory map; one section from 0k->640k,
 105          * the next section from 1mb->appropriate_mem_k
 106          */
 107         sanitize_e820_map(E820_MAP, &E820_MAP_NR);
 108         if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
 109                 unsigned long mem_size;
 110
 111                 /* compare results from other methods and take the greater */
 112                 if (ALT_MEM_K < EXT_MEM_K) {
 113                         mem_size = EXT_MEM_K;
 114                         who = "BIOS-88";
 115                 } else {
 116                         mem_size = ALT_MEM_K;
 117                         who = "BIOS-e801";
 118                 }
 119
 120                 e820.nr_map = 0;
 121                 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
 122                 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
 123         }
 124         return who;
 125 }