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
13void __init pre_intr_init_hook(void)
14{
15	init_ISA_irqs();
16}
17
18/*
19 * IRQ2 is cascade interrupt to second interrupt controller
20 */
21static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
22
23void __init intr_init_hook(void)
24{
25#ifdef CONFIG_SMP
26	smp_intr_init();
27#endif
28
29	setup_irq(2, &irq2);
30}
31
32void __init pre_setup_arch_hook(void)
33{
34	/* Voyagers run their CPUs from independent clocks, so disable
35	 * the TSC code because we can't sync them */
36	tsc_disable = 1;
37}
38
39void __init trap_init_hook(void)
40{
41}
42
43static struct irqaction irq0  = {
44	.handler = timer_interrupt,
45	.flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
46	.mask = CPU_MASK_NONE,
47	.name = "timer"
48};
49
50void __init time_init_hook(void)
51{
52	irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
53	setup_irq(0, &irq0);
54}
55
56/* Hook for machine specific memory setup. */
57
58char * __init machine_specific_memory_setup(void)
59{
60	char *who;
61
62	who = "NOT VOYAGER";
63
64	if(voyager_level == 5) {
65		__u32 addr, length;
66		int i;
67
68		who = "Voyager-SUS";
69
70		e820.nr_map = 0;
71		for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
72			add_memory_region(addr, length, E820_RAM);
73		}
74		return who;
75	} else if(voyager_level == 4) {
76		__u32 tom;
77		__u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
78		/* select the DINO config space */
79		outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
80		/* Read DINO top of memory register */
81		tom = ((inb(catbase + 0x4) & 0xf0) << 16)
82			+ ((inb(catbase + 0x5) & 0x7f) << 24);
83
84		if(inb(catbase) != VOYAGER_DINO) {
85			printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
86			tom = (EXT_MEM_K)<<10;
87		}
88		who = "Voyager-TOM";
89		add_memory_region(0, 0x9f000, E820_RAM);
90		/* map from 1M to top of memory */
91		add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
92		add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
93		return who;
94	}
95
96	who = "BIOS-e820";
97
98	/*
99	 * Try to copy the BIOS-supplied E820-map.
100	 *
101	 * Otherwise fake a memory map; one section from 0k->640k,
102	 * the next section from 1mb->appropriate_mem_k
103	 */
104	sanitize_e820_map(E820_MAP, &E820_MAP_NR);
105	if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
106		unsigned long mem_size;
107
108		/* compare results from other methods and take the greater */
109		if (ALT_MEM_K < EXT_MEM_K) {
110			mem_size = EXT_MEM_K;
111			who = "BIOS-88";
112		} else {
113			mem_size = ALT_MEM_K;
114			who = "BIOS-e801";
115		}
116
117		e820.nr_map = 0;
118		add_memory_region(0, LOWMEMSIZE(), E820_RAM);
119		add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
120  	}
121	return who;
122}
123