ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / arch / x86 / mach-voyager / setup.c
blob5ae5466b9eb9c3b9850fca6617e36dab2c653da7
1 /*
2 * Machine specific setup for generic
3 */
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>
13 void __init pre_intr_init_hook(void)
15 init_ISA_irqs();
19 * IRQ2 is cascade interrupt to second interrupt controller
21 static struct irqaction irq2 = {
22 .handler = no_action,
23 .mask = CPU_MASK_NONE,
24 .name = "cascade",
27 void __init intr_init_hook(void)
29 #ifdef CONFIG_SMP
30 smp_intr_init();
31 #endif
33 setup_irq(2, &irq2);
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,
51 .name = "timer"
54 void __init time_init_hook(void)
56 irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
57 setup_irq(0, &irq0);
60 /* Hook for machine specific memory setup. */
62 char *__init machine_specific_memory_setup(void)
64 char *who;
66 who = "NOT VOYAGER";
68 if (voyager_level == 5) {
69 __u32 addr, length;
70 int i;
72 who = "Voyager-SUS";
74 e820.nr_map = 0;
75 for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
76 add_memory_region(addr, length, E820_RAM);
78 return who;
79 } else if (voyager_level == 4) {
80 __u32 tom;
81 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT) << 8;
82 /* select the DINO config space */
83 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
84 /* Read DINO top of memory register */
85 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
86 + ((inb(catbase + 0x5) & 0x7f) << 24);
88 if (inb(catbase) != VOYAGER_DINO) {
89 printk(KERN_ERR
90 "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
91 tom = (boot_params.screen_info.ext_mem_k) << 10;
93 who = "Voyager-TOM";
94 add_memory_region(0, 0x9f000, E820_RAM);
95 /* map from 1M to top of memory */
96 add_memory_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
97 E820_RAM);
98 /* FIXME: Should check the ASICs to see if I need to
99 * take out the 8M window. Just do it at the moment
100 * */
101 add_memory_region(8 * 1024 * 1024, 8 * 1024 * 1024,
102 E820_RESERVED);
103 return who;
106 who = "BIOS-e820";
109 * Try to copy the BIOS-supplied E820-map.
111 * Otherwise fake a memory map; one section from 0k->640k,
112 * the next section from 1mb->appropriate_mem_k
114 sanitize_e820_map(boot_params.e820_map, &boot_params.e820_entries);
115 if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries)
116 < 0) {
117 unsigned long mem_size;
119 /* compare results from other methods and take the greater */
120 if (boot_params.alt_mem_k < boot_params.screen_info.ext_mem_k) {
121 mem_size = boot_params.screen_info.ext_mem_k;
122 who = "BIOS-88";
123 } else {
124 mem_size = boot_params.alt_mem_k;
125 who = "BIOS-e801";
128 e820.nr_map = 0;
129 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
130 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
132 return who;