2 * Machine specific setup for generic
5 #include <linux/init.h>
6 #include <linux/interrupt.h>
7 #include <asm/arch_hooks.h>
8 #include <asm/voyager.h>
11 #include <asm/setup.h>
14 void __init pre_intr_init_hook(void)
20 * IRQ2 is cascade interrupt to second interrupt controller
22 static struct irqaction irq2 = {
24 .mask = CPU_MASK_NONE,
28 void __init intr_init_hook(void)
31 voyager_smp_intr_init();
37 static void voyager_disable_tsc(void)
39 /* Voyagers run their CPUs from independent clocks, so disable
40 * the TSC code because we can't sync them */
41 setup_clear_cpu_cap(X86_FEATURE_TSC);
44 void __init pre_setup_arch_hook(void)
46 voyager_disable_tsc();
49 void __init pre_time_init_hook(void)
51 voyager_disable_tsc();
54 void __init trap_init_hook(void)
58 static struct irqaction irq0 = {
59 .handler = timer_interrupt,
60 .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
61 .mask = CPU_MASK_NONE,
65 void __init time_init_hook(void)
67 irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
71 /* Hook for machine specific memory setup. */
73 char *__init machine_specific_memory_setup(void)
80 if (voyager_level == 5) {
87 for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
88 e820_add_region(addr, length, E820_RAM);
91 } else if (voyager_level == 4) {
93 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT) << 8;
94 /* select the DINO config space */
95 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
96 /* Read DINO top of memory register */
97 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
98 + ((inb(catbase + 0x5) & 0x7f) << 24);
100 if (inb(catbase) != VOYAGER_DINO) {
102 "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
103 tom = (boot_params.screen_info.ext_mem_k) << 10;
106 e820_add_region(0, 0x9f000, E820_RAM);
107 /* map from 1M to top of memory */
108 e820_add_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
110 /* FIXME: Should check the ASICs to see if I need to
111 * take out the 8M window. Just do it at the moment
113 e820_add_region(8 * 1024 * 1024, 8 * 1024 * 1024,
118 return default_machine_specific_memory_setup();