126 строки
2.8 KiB
C
126 строки
2.8 KiB
C
/*
|
|
* 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 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
|
|
|
|
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 */
|
|
tsc_disable = 1;
|
|
}
|
|
|
|
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 = (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(E820_MAP, &E820_MAP_NR);
|
|
if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
|
|
unsigned long mem_size;
|
|
|
|
/* compare results from other methods and take the greater */
|
|
if (ALT_MEM_K < EXT_MEM_K) {
|
|
mem_size = EXT_MEM_K;
|
|
who = "BIOS-88";
|
|
} else {
|
|
mem_size = 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;
|
|
}
|