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/*
* Machine specific setup for generic
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/arch_hooks.h>
#include <asm/voyager.h>
#include <asm/e820.h>
#include <asm/io.h>
#include <asm/setup.h>
void __init pre_intr_init_hook(void)
{
init_ISA_irqs();
}
/*
* IRQ2 is cascade interrupt to second interrupt controller
*/
static struct irqaction irq2 = {
.handler = no_action,
.mask = CPU_MASK_NONE,
.name = "cascade",
};
void __init intr_init_hook(void)
{
#ifdef CONFIG_SMP
smp_intr_init();
#endif
setup_irq(2, &irq2);
}
void __init pre_setup_arch_hook(void)
{
/* Voyagers run their CPUs from independent clocks, so disable
* the TSC code because we can't sync them */
setup_clear_cpu_cap(X86_FEATURE_TSC);
}
void __init trap_init_hook(void)
{
}
static struct irqaction irq0 = {
.handler = timer_interrupt,
.flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
.mask = CPU_MASK_NONE,
.name = "timer"
};
void __init time_init_hook(void)
{
irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
setup_irq(0, &irq0);
}
/* Hook for machine specific memory setup. */
char *__init machine_specific_memory_setup(void)
{
char *who;
who = "NOT VOYAGER";
if (voyager_level == 5) {
__u32 addr, length;
int i;
who = "Voyager-SUS";
e820.nr_map = 0;
for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
add_memory_region(addr, length, E820_RAM);
}
return who;
} else if (voyager_level == 4) {
__u32 tom;
__u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT) << 8;
/* select the DINO config space */
outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
/* Read DINO top of memory register */
tom = ((inb(catbase + 0x4) & 0xf0) << 16)
+ ((inb(catbase + 0x5) & 0x7f) << 24);
if (inb(catbase) != VOYAGER_DINO) {
printk(KERN_ERR
"Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
tom = (boot_params.screen_info.ext_mem_k) << 10;
}
who = "Voyager-TOM";
add_memory_region(0, 0x9f000, E820_RAM);
/* map from 1M to top of memory */
add_memory_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
E820_RAM);
/* FIXME: Should check the ASICs to see if I need to
* take out the 8M window. Just do it at the moment
* */
add_memory_region(8 * 1024 * 1024, 8 * 1024 * 1024,
E820_RESERVED);
return who;
}
who = "BIOS-e820";
/*
* Try to copy the BIOS-supplied E820-map.
*
* Otherwise fake a memory map; one section from 0k->640k,
* the next section from 1mb->appropriate_mem_k
*/
sanitize_e820_map(boot_params.e820_map,
ARRAY_SIZE(boot_params.e820_map),
&boot_params.e820_entries);
if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries)
< 0) {
unsigned long mem_size;
/* compare results from other methods and take the greater */
if (boot_params.alt_mem_k < boot_params.screen_info.ext_mem_k) {
mem_size = boot_params.screen_info.ext_mem_k;
who = "BIOS-88";
} else {
mem_size = boot_params.alt_mem_k;
who = "BIOS-e801";
}
e820.nr_map = 0;
add_memory_region(0, LOWMEMSIZE(), E820_RAM);
add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
}
return who;
}
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