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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc64/kernel/starfire.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sparc64/kernel/starfire.c')
-rw-r--r--arch/sparc64/kernel/starfire.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/starfire.c b/arch/sparc64/kernel/starfire.c
new file mode 100644
index 000000000000..ae859d40771e
--- /dev/null
+++ b/arch/sparc64/kernel/starfire.c
@@ -0,0 +1,123 @@
1/* $Id: starfire.c,v 1.10 2001/04/14 21:13:45 davem Exp $
2 * starfire.c: Starfire/E10000 support.
3 *
4 * Copyright (C) 1998 David S. Miller (davem@redhat.com)
5 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
6 */
7
8#include <linux/kernel.h>
9#include <linux/slab.h>
10
11#include <asm/page.h>
12#include <asm/oplib.h>
13#include <asm/smp.h>
14#include <asm/upa.h>
15#include <asm/starfire.h>
16
17/*
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
20 * way.
21 */
22int this_is_starfire = 0;
23
24void check_if_starfire(void)
25{
26 int ssnode = prom_finddevice("/ssp-serial");
27 if (ssnode != 0 && ssnode != -1)
28 this_is_starfire = 1;
29}
30
31void starfire_cpu_setup(void)
32{
33 /* Currently, nothing to do. */
34}
35
36int starfire_hard_smp_processor_id(void)
37{
38 return upa_readl(0x1fff40000d0UL);
39}
40
41/*
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.
46 */
47struct starfire_irqinfo {
48 unsigned long imap_slots[32];
49 unsigned long tregs[32];
50 struct starfire_irqinfo *next;
51 int upaid, hwmid;
52};
53
54static struct starfire_irqinfo *sflist = NULL;
55
56/* Beam me up Scott(McNeil)y... */
57void *starfire_hookup(int upaid)
58{
59 struct starfire_irqinfo *p;
60 unsigned long treg_base, hwmid, i;
61
62 p = kmalloc(sizeof(*p), GFP_KERNEL);
63 if (!p) {
64 prom_printf("starfire_hookup: No memory, this is insane.\n");
65 prom_halt();
66 }
67 treg_base = 0x100fc000000UL;
68 hwmid = ((upaid & 0x3c) << 1) |
69 ((upaid & 0x40) >> 4) |
70 (upaid & 0x3);
71 p->hwmid = hwmid;
72 treg_base += (hwmid << 33UL);
73 treg_base += 0x200UL;
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;
80 }
81 p->upaid = upaid;
82 p->next = sflist;
83 sflist = p;
84
85 return (void *) p;
86}
87
88unsigned int starfire_translate(unsigned long imap,
89 unsigned int upaid)
90{
91 struct starfire_irqinfo *p;
92 unsigned int bus_hwmid;
93 unsigned int i;
94
95 bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
96 for (p = sflist; p != NULL; p = p->next)
97 if (p->hwmid == bus_hwmid)
98 break;
99 if (p == NULL) {
100 prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
101 ((unsigned long)imap));
102 prom_halt();
103 }
104 for (i = 0; i < 32; i++) {
105 if (p->imap_slots[i] == imap ||
106 p->imap_slots[i] == 0UL)
107 break;
108 }
109 if (i == 32) {
110 printk("starfire_translate: Are you kidding me?\n");
111 panic("Lucy in the sky....");
112 }
113 p->imap_slots[i] = imap;
114
115 /* map to real upaid */
116 upaid = (((upaid & 0x3c) << 1) |
117 ((upaid & 0x40) >> 4) |
118 (upaid & 0x3));
119
120 upa_writel(upaid, p->tregs[i]);
121
122 return i;
123}