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  = { timer_interrupt, IRQF_DISABLED, CPU_MASK_NONE, "timer", NULL, NULL};
  44
  45 void __init time_init_hook(void)
  46 {
  47         setup_irq(0, &irq0);
  48 }
  49
  50 /* Hook for machine specific memory setup. */
  51
  52 char * __init machine_specific_memory_setup(void)
  53 {
  54         char *who;
  55
  56         who = "NOT VOYAGER";
  57
  58         if(voyager_level == 5) {
  59                 __u32 addr, length;
  60                 int i;
  61
  62                 who = "Voyager-SUS";
  63
  64                 e820.nr_map = 0;
  65                 for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
  66                         add_memory_region(addr, length, E820_RAM);
  67                 }
  68                 return who;
  69         } else if(voyager_level == 4) {
  70                 __u32 tom;
  71                 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
  72                 /* select the DINO config space */
  73                 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
  74                 /* Read DINO top of memory register */
  75                 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
  76                         + ((inb(catbase + 0x5) & 0x7f) << 24);
  77
  78                 if(inb(catbase) != VOYAGER_DINO) {
  79                         printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
  80                         tom = (EXT_MEM_K)<<10;
  81                 }
  82                 who = "Voyager-TOM";
  83                 add_memory_region(0, 0x9f000, E820_RAM);
  84                 /* map from 1M to top of memory */
  85                 add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
  86                 /* FIXME: Should check the ASICs to see if I need to
  87                  * take out the 8M window.  Just do it at the moment
  88                  * */
  89                 add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
  90                 return who;
  91         }
  92
  93         who = "BIOS-e820";
  94
  95         /*
  96          * Try to copy the BIOS-supplied E820-map.
  97          *
  98          * Otherwise fake a memory map; one section from 0k->640k,
  99          * the next section from 1mb->appropriate_mem_k
 100          */
 101         sanitize_e820_map(E820_MAP, &E820_MAP_NR);
 102         if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
 103                 unsigned long mem_size;
 104
 105                 /* compare results from other methods and take the greater */
 106                 if (ALT_MEM_K < EXT_MEM_K) {
 107                         mem_size = EXT_MEM_K;
 108                         who = "BIOS-88";
 109                 } else {
 110                         mem_size = ALT_MEM_K;
 111                         who = "BIOS-e801";
 112                 }
 113
 114                 e820.nr_map = 0;
 115                 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
 116                 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
 117         }
 118         return who;
 119 }