Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6] / arch / x86 / 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 = {
22         .handler = no_action,
23         .mask = CPU_MASK_NONE,
24         .name = "cascade",
25 };
26
27 void __init intr_init_hook(void)
28 {
29 #ifdef CONFIG_SMP
30         voyager_smp_intr_init();
31 #endif
32
33         setup_irq(2, &irq2);
34 }
35
36 static void voyager_disable_tsc(void)
37 {
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);
41 }
42
43 void __init pre_setup_arch_hook(void)
44 {
45         voyager_disable_tsc();
46 }
47
48 void __init pre_time_init_hook(void)
49 {
50         voyager_disable_tsc();
51 }
52
53 void __init trap_init_hook(void)
54 {
55 }
56
57 static struct irqaction irq0 = {
58         .handler = timer_interrupt,
59         .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
60         .mask = CPU_MASK_NONE,
61         .name = "timer"
62 };
63
64 void __init time_init_hook(void)
65 {
66         irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
67         setup_irq(0, &irq0);
68 }
69
70 /* Hook for machine specific memory setup. */
71
72 char *__init machine_specific_memory_setup(void)
73 {
74         char *who;
75         int new_nr;
76
77         who = "NOT VOYAGER";
78
79         if (voyager_level == 5) {
80                 __u32 addr, length;
81                 int i;
82
83                 who = "Voyager-SUS";
84
85                 e820.nr_map = 0;
86                 for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
87                         e820_add_region(addr, length, E820_RAM);
88                 }
89                 return who;
90         } else if (voyager_level == 4) {
91                 __u32 tom;
92                 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT) << 8;
93                 /* select the DINO config space */
94                 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
95                 /* Read DINO top of memory register */
96                 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
97                     + ((inb(catbase + 0x5) & 0x7f) << 24);
98
99                 if (inb(catbase) != VOYAGER_DINO) {
100                         printk(KERN_ERR
101                                "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
102                         tom = (boot_params.screen_info.ext_mem_k) << 10;
103                 }
104                 who = "Voyager-TOM";
105                 e820_add_region(0, 0x9f000, E820_RAM);
106                 /* map from 1M to top of memory */
107                 e820_add_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
108                                   E820_RAM);
109                 /* FIXME: Should check the ASICs to see if I need to
110                  * take out the 8M window.  Just do it at the moment
111                  * */
112                 e820_add_region(8 * 1024 * 1024, 8 * 1024 * 1024,
113                                   E820_RESERVED);
114                 return who;
115         }
116
117         return default_machine_specific_memory_setup();
118 }