1 /* $Id: starfire.c,v 1.10 2001/04/14 21:13:45 davem Exp $
2 * starfire.c: Starfire/E10000 support.
4 * Copyright (C) 1998 David S. Miller (davem@redhat.com)
5 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
8 #include <linux/kernel.h>
9 #include <linux/slab.h>
12 #include <asm/oplib.h>
15 #include <asm/starfire.h>
18 * A few places around the kernel check this to see if
19 * they need to call us to do things in a Starfire specific
22 int this_is_starfire = 0;
24 void check_if_starfire(void)
26 int ssnode = prom_finddevice("/ssp-serial");
27 if (ssnode != 0 && ssnode != -1)
31 void starfire_cpu_setup(void)
33 /* Currently, nothing to do. */
36 int starfire_hard_smp_processor_id(void)
38 return upa_readl(0x1fff40000d0UL);
42 * Each Starfire board has 32 registers which perform translation
43 * and delivery of traditional interrupt packets into the extended
44 * Starfire hardware format. Essentially UPAID's now have 2 more
45 * bits than in all previous Sun5 systems.
47 struct starfire_irqinfo {
48 unsigned long imap_slots[32];
49 unsigned long tregs[32];
50 struct starfire_irqinfo *next;
54 static struct starfire_irqinfo *sflist = NULL;
56 /* Beam me up Scott(McNeil)y... */
57 void *starfire_hookup(int upaid)
59 struct starfire_irqinfo *p;
60 unsigned long treg_base, hwmid, i;
62 p = kmalloc(sizeof(*p), GFP_KERNEL);
64 prom_printf("starfire_hookup: No memory, this is insane.\n");
67 treg_base = 0x100fc000000UL;
68 hwmid = ((upaid & 0x3c) << 1) |
69 ((upaid & 0x40) >> 4) |
72 treg_base += (hwmid << 33UL);
74 for (i = 0; i < 32; i++) {
75 p->imap_slots[i] = 0UL;
76 p->tregs[i] = treg_base + (i * 0x10UL);
77 /* Lets play it safe and not overwrite existing mappings */
78 if (upa_readl(p->tregs[i]) != 0)
79 p->imap_slots[i] = 0xdeadbeaf;
88 unsigned int starfire_translate(unsigned long imap,
91 struct starfire_irqinfo *p;
92 unsigned int bus_hwmid;
95 bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
96 for (p = sflist; p != NULL; p = p->next)
97 if (p->hwmid == bus_hwmid)
100 prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
101 ((unsigned long)imap));
104 for (i = 0; i < 32; i++) {
105 if (p->imap_slots[i] == imap ||
106 p->imap_slots[i] == 0UL)
110 printk("starfire_translate: Are you kidding me?\n");
111 panic("Lucy in the sky....");
113 p->imap_slots[i] = imap;
115 /* map to real upaid */
116 upaid = (((upaid & 0x3c) << 1) |
117 ((upaid & 0x40) >> 4) |
120 upa_writel(upaid, p->tregs[i]);