mirror of https://gitee.com/openkylin/linux.git
117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
/*
|
|
* starfire.c: Starfire/E10000 support.
|
|
*
|
|
* Copyright (C) 1998 David S. Miller (davem@redhat.com)
|
|
* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/oplib.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/upa.h>
|
|
#include <asm/starfire.h>
|
|
|
|
/*
|
|
* A few places around the kernel check this to see if
|
|
* they need to call us to do things in a Starfire specific
|
|
* way.
|
|
*/
|
|
int this_is_starfire = 0;
|
|
|
|
void check_if_starfire(void)
|
|
{
|
|
phandle ssnode = prom_finddevice("/ssp-serial");
|
|
if (ssnode != 0 && ssnode != -1)
|
|
this_is_starfire = 1;
|
|
}
|
|
|
|
int starfire_hard_smp_processor_id(void)
|
|
{
|
|
return upa_readl(0x1fff40000d0UL);
|
|
}
|
|
|
|
/*
|
|
* Each Starfire board has 32 registers which perform translation
|
|
* and delivery of traditional interrupt packets into the extended
|
|
* Starfire hardware format. Essentially UPAID's now have 2 more
|
|
* bits than in all previous Sun5 systems.
|
|
*/
|
|
struct starfire_irqinfo {
|
|
unsigned long imap_slots[32];
|
|
unsigned long tregs[32];
|
|
struct starfire_irqinfo *next;
|
|
int upaid, hwmid;
|
|
};
|
|
|
|
static struct starfire_irqinfo *sflist = NULL;
|
|
|
|
/* Beam me up Scott(McNeil)y... */
|
|
void starfire_hookup(int upaid)
|
|
{
|
|
struct starfire_irqinfo *p;
|
|
unsigned long treg_base, hwmid, i;
|
|
|
|
p = kmalloc(sizeof(*p), GFP_KERNEL);
|
|
if (!p) {
|
|
prom_printf("starfire_hookup: No memory, this is insane.\n");
|
|
prom_halt();
|
|
}
|
|
treg_base = 0x100fc000000UL;
|
|
hwmid = ((upaid & 0x3c) << 1) |
|
|
((upaid & 0x40) >> 4) |
|
|
(upaid & 0x3);
|
|
p->hwmid = hwmid;
|
|
treg_base += (hwmid << 33UL);
|
|
treg_base += 0x200UL;
|
|
for (i = 0; i < 32; i++) {
|
|
p->imap_slots[i] = 0UL;
|
|
p->tregs[i] = treg_base + (i * 0x10UL);
|
|
/* Lets play it safe and not overwrite existing mappings */
|
|
if (upa_readl(p->tregs[i]) != 0)
|
|
p->imap_slots[i] = 0xdeadbeaf;
|
|
}
|
|
p->upaid = upaid;
|
|
p->next = sflist;
|
|
sflist = p;
|
|
}
|
|
|
|
unsigned int starfire_translate(unsigned long imap,
|
|
unsigned int upaid)
|
|
{
|
|
struct starfire_irqinfo *p;
|
|
unsigned int bus_hwmid;
|
|
unsigned int i;
|
|
|
|
bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
|
|
for (p = sflist; p != NULL; p = p->next)
|
|
if (p->hwmid == bus_hwmid)
|
|
break;
|
|
if (p == NULL) {
|
|
prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
|
|
((unsigned long)imap));
|
|
prom_halt();
|
|
}
|
|
for (i = 0; i < 32; i++) {
|
|
if (p->imap_slots[i] == imap ||
|
|
p->imap_slots[i] == 0UL)
|
|
break;
|
|
}
|
|
if (i == 32) {
|
|
printk("starfire_translate: Are you kidding me?\n");
|
|
panic("Lucy in the sky....");
|
|
}
|
|
p->imap_slots[i] = imap;
|
|
|
|
/* map to real upaid */
|
|
upaid = (((upaid & 0x3c) << 1) |
|
|
((upaid & 0x40) >> 4) |
|
|
(upaid & 0x3));
|
|
|
|
upa_writel(upaid, p->tregs[i]);
|
|
|
|
return i;
|
|
}
|