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1da177e4 LT |
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 | */ | |
22 | int this_is_starfire = 0; | |
23 | ||
24 | void 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 | ||
31 | void starfire_cpu_setup(void) | |
32 | { | |
33 | /* Currently, nothing to do. */ | |
34 | } | |
35 | ||
36 | int 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 | */ | |
47 | struct starfire_irqinfo { | |
48 | unsigned long imap_slots[32]; | |
49 | unsigned long tregs[32]; | |
50 | struct starfire_irqinfo *next; | |
51 | int upaid, hwmid; | |
52 | }; | |
53 | ||
54 | static struct starfire_irqinfo *sflist = NULL; | |
55 | ||
56 | /* Beam me up Scott(McNeil)y... */ | |
286bbe87 | 57 | void starfire_hookup(int upaid) |
1da177e4 LT |
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; | |
1da177e4 LT |
84 | } |
85 | ||
86 | unsigned int starfire_translate(unsigned long imap, | |
87 | unsigned int upaid) | |
88 | { | |
89 | struct starfire_irqinfo *p; | |
90 | unsigned int bus_hwmid; | |
91 | unsigned int i; | |
92 | ||
93 | bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f; | |
94 | for (p = sflist; p != NULL; p = p->next) | |
95 | if (p->hwmid == bus_hwmid) | |
96 | break; | |
97 | if (p == NULL) { | |
98 | prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n", | |
99 | ((unsigned long)imap)); | |
100 | prom_halt(); | |
101 | } | |
102 | for (i = 0; i < 32; i++) { | |
103 | if (p->imap_slots[i] == imap || | |
104 | p->imap_slots[i] == 0UL) | |
105 | break; | |
106 | } | |
107 | if (i == 32) { | |
108 | printk("starfire_translate: Are you kidding me?\n"); | |
109 | panic("Lucy in the sky...."); | |
110 | } | |
111 | p->imap_slots[i] = imap; | |
112 | ||
113 | /* map to real upaid */ | |
114 | upaid = (((upaid & 0x3c) << 1) | | |
115 | ((upaid & 0x40) >> 4) | | |
116 | (upaid & 0x3)); | |
117 | ||
118 | upa_writel(upaid, p->tregs[i]); | |
119 | ||
120 | return i; | |
121 | } |