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 13void __init pre_intr_init_hook(void) 14{ 15 init_ISA_irqs(); 16} 17 18/* 19 * IRQ2 is cascade interrupt to second interrupt controller 20 */ 21static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL}; 22 23void __init intr_init_hook(void) 24{ 25#ifdef CONFIG_SMP 26 smp_intr_init(); 27#endif 28 29 setup_irq(2, &irq2); 30} 31 32void __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 39void __init trap_init_hook(void) 40{ 41} 42 43static 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 50void __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 58char * __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 add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED); 93 return who; 94 } 95 96 who = "BIOS-e820"; 97 98 /* 99 * Try to copy the BIOS-supplied E820-map. 100 * 101 * Otherwise fake a memory map; one section from 0k->640k, 102 * the next section from 1mb->appropriate_mem_k 103 */ 104 sanitize_e820_map(E820_MAP, &E820_MAP_NR); 105 if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) { 106 unsigned long mem_size; 107 108 /* compare results from other methods and take the greater */ 109 if (ALT_MEM_K < EXT_MEM_K) { 110 mem_size = EXT_MEM_K; 111 who = "BIOS-88"; 112 } else { 113 mem_size = ALT_MEM_K; 114 who = "BIOS-e801"; 115 } 116 117 e820.nr_map = 0; 118 add_memory_region(0, LOWMEMSIZE(), E820_RAM); 119 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM); 120 } 121 return who; 122} 123