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)
30 voyager_smp_intr_init();
36 static void voyager_disable_tsc(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
pre_setup_arch_hook(void)
45 voyager_disable_tsc();
48 void __init
pre_time_init_hook(void)
50 voyager_disable_tsc();
53 void __init
trap_init_hook(void)
57 static struct irqaction irq0
= {
58 .handler
= timer_interrupt
,
59 .flags
= IRQF_DISABLED
| IRQF_NOBALANCING
| IRQF_IRQPOLL
| IRQF_TIMER
,
60 .mask
= CPU_MASK_NONE
,
64 void __init
time_init_hook(void)
66 irq0
.mask
= cpumask_of_cpu(safe_smp_processor_id());
70 /* Hook for machine specific memory setup. */
72 char *__init
machine_specific_memory_setup(void)
79 if (voyager_level
== 5) {
86 for (i
= 0; voyager_memory_detect(i
, &addr
, &length
); i
++) {
87 e820_add_region(addr
, length
, E820_RAM
);
90 } else if (voyager_level
== 4) {
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);
99 if (inb(catbase
) != VOYAGER_DINO
) {
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;
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,
109 /* FIXME: Should check the ASICs to see if I need to
110 * take out the 8M window. Just do it at the moment
112 e820_add_region(8 * 1024 * 1024, 8 * 1024 * 1024,
117 return default_machine_specific_memory_setup();