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>
13 void __init pre_intr_init_hook(void)
19 * IRQ2 is cascade interrupt to second interrupt controller
21 static struct irqaction irq2 = {
23 .mask = CPU_MASK_NONE,
27 void __init intr_init_hook(void)
36 void __init pre_setup_arch_hook(void)
38 /* Voyagers run their CPUs from independent clocks, so disable
39 * the TSC code because we can't sync them */
40 setup_clear_cpu_cap(X86_FEATURE_TSC);
43 void __init trap_init_hook(void)
47 static struct irqaction irq0 = {
48 .handler = timer_interrupt,
49 .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
50 .mask = CPU_MASK_NONE,
54 void __init time_init_hook(void)
56 irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
60 /* Hook for machine specific memory setup. */
62 char *__init machine_specific_memory_setup(void)
69 if (voyager_level == 5) {
76 for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
77 add_memory_region(addr, length, E820_RAM);
80 } else if (voyager_level == 4) {
82 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT) << 8;
83 /* select the DINO config space */
84 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
85 /* Read DINO top of memory register */
86 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
87 + ((inb(catbase + 0x5) & 0x7f) << 24);
89 if (inb(catbase) != VOYAGER_DINO) {
91 "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
92 tom = (boot_params.screen_info.ext_mem_k) << 10;
95 add_memory_region(0, 0x9f000, E820_RAM);
96 /* map from 1M to top of memory */
97 add_memory_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
99 /* FIXME: Should check the ASICs to see if I need to
100 * take out the 8M window. Just do it at the moment
102 add_memory_region(8 * 1024 * 1024, 8 * 1024 * 1024,
110 * Try to copy the BIOS-supplied E820-map.
112 * Otherwise fake a memory map; one section from 0k->640k,
113 * the next section from 1mb->appropriate_mem_k
115 new_nr = boot_params.e820_entries;
116 sanitize_e820_map(boot_params.e820_map,
117 ARRAY_SIZE(boot_params.e820_map),
119 boot_params.e820_entries = new_nr;
120 if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries)
122 unsigned long mem_size;
124 /* compare results from other methods and take the greater */
125 if (boot_params.alt_mem_k < boot_params.screen_info.ext_mem_k) {
126 mem_size = boot_params.screen_info.ext_mem_k;
129 mem_size = boot_params.alt_mem_k;
134 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
135 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);