x86: rename two e820 related functions
[linux-3.10.git] / 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         smp_intr_init();
31 #endif
32
33         setup_irq(2, &irq2);
34 }
35
36 void __init pre_setup_arch_hook(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 trap_init_hook(void)
44 {
45 }
46
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"
52 };
53
54 void __init time_init_hook(void)
55 {
56         irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
57         setup_irq(0, &irq0);
58 }
59
60 /* Hook for machine specific memory setup. */
61
62 char *__init machine_specific_memory_setup(void)
63 {
64         char *who;
65         int new_nr;
66
67         who = "NOT VOYAGER";
68
69         if (voyager_level == 5) {
70                 __u32 addr, length;
71                 int i;
72
73                 who = "Voyager-SUS";
74
75                 e820.nr_map = 0;
76                 for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
77                         e820_add_region(addr, length, E820_RAM);
78                 }
79                 return who;
80         } else if (voyager_level == 4) {
81                 __u32 tom;
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);
88
89                 if (inb(catbase) != VOYAGER_DINO) {
90                         printk(KERN_ERR
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;
93                 }
94                 who = "Voyager-TOM";
95                 e820_add_region(0, 0x9f000, E820_RAM);
96                 /* map from 1M to top of memory */
97                 e820_add_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
98                                   E820_RAM);
99                 /* FIXME: Should check the ASICs to see if I need to
100                  * take out the 8M window.  Just do it at the moment
101                  * */
102                 e820_add_region(8 * 1024 * 1024, 8 * 1024 * 1024,
103                                   E820_RESERVED);
104                 return who;
105         }
106
107         who = "BIOS-e820";
108
109         /*
110          * Try to copy the BIOS-supplied E820-map.
111          *
112          * Otherwise fake a memory map; one section from 0k->640k,
113          * the next section from 1mb->appropriate_mem_k
114          */
115         new_nr = boot_params.e820_entries;
116         sanitize_e820_map(boot_params.e820_map,
117                         ARRAY_SIZE(boot_params.e820_map),
118                         &new_nr);
119         boot_params.e820_entries = new_nr;
120         if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries)
121             < 0) {
122                 unsigned long mem_size;
123
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;
127                         who = "BIOS-88";
128                 } else {
129                         mem_size = boot_params.alt_mem_k;
130                         who = "BIOS-e801";
131                 }
132
133                 e820.nr_map = 0;
134                 e820_add_region(0, LOWMEMSIZE(), E820_RAM);
135                 e820_add_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
136         }
137         return who;
138 }