Loading...
1/*
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 phandle ssnode = prom_finddevice("/ssp-serial");
27 if (ssnode != 0 && (s32)ssnode != -1)
28 this_is_starfire = 1;
29}
30
31/*
32 * Each Starfire board has 32 registers which perform translation
33 * and delivery of traditional interrupt packets into the extended
34 * Starfire hardware format. Essentially UPAID's now have 2 more
35 * bits than in all previous Sun5 systems.
36 */
37struct starfire_irqinfo {
38 unsigned long imap_slots[32];
39 unsigned long tregs[32];
40 struct starfire_irqinfo *next;
41 int upaid, hwmid;
42};
43
44static struct starfire_irqinfo *sflist = NULL;
45
46/* Beam me up Scott(McNeil)y... */
47void starfire_hookup(int upaid)
48{
49 struct starfire_irqinfo *p;
50 unsigned long treg_base, hwmid, i;
51
52 p = kmalloc(sizeof(*p), GFP_KERNEL);
53 if (!p) {
54 prom_printf("starfire_hookup: No memory, this is insane.\n");
55 prom_halt();
56 }
57 treg_base = 0x100fc000000UL;
58 hwmid = ((upaid & 0x3c) << 1) |
59 ((upaid & 0x40) >> 4) |
60 (upaid & 0x3);
61 p->hwmid = hwmid;
62 treg_base += (hwmid << 33UL);
63 treg_base += 0x200UL;
64 for (i = 0; i < 32; i++) {
65 p->imap_slots[i] = 0UL;
66 p->tregs[i] = treg_base + (i * 0x10UL);
67 /* Lets play it safe and not overwrite existing mappings */
68 if (upa_readl(p->tregs[i]) != 0)
69 p->imap_slots[i] = 0xdeadbeaf;
70 }
71 p->upaid = upaid;
72 p->next = sflist;
73 sflist = p;
74}
75
76unsigned int starfire_translate(unsigned long imap,
77 unsigned int upaid)
78{
79 struct starfire_irqinfo *p;
80 unsigned int bus_hwmid;
81 unsigned int i;
82
83 bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
84 for (p = sflist; p != NULL; p = p->next)
85 if (p->hwmid == bus_hwmid)
86 break;
87 if (p == NULL) {
88 prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
89 ((unsigned long)imap));
90 prom_halt();
91 }
92 for (i = 0; i < 32; i++) {
93 if (p->imap_slots[i] == imap ||
94 p->imap_slots[i] == 0UL)
95 break;
96 }
97 if (i == 32) {
98 printk("starfire_translate: Are you kidding me?\n");
99 panic("Lucy in the sky....");
100 }
101 p->imap_slots[i] = imap;
102
103 /* map to real upaid */
104 upaid = (((upaid & 0x3c) << 1) |
105 ((upaid & 0x40) >> 4) |
106 (upaid & 0x3));
107
108 upa_writel(upaid, p->tregs[i]);
109
110 return i;
111}
1/*
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 phandle ssnode = prom_finddevice("/ssp-serial");
27 if (ssnode != 0 && (s32)ssnode != -1)
28 this_is_starfire = 1;
29}
30
31/*
32 * Each Starfire board has 32 registers which perform translation
33 * and delivery of traditional interrupt packets into the extended
34 * Starfire hardware format. Essentially UPAID's now have 2 more
35 * bits than in all previous Sun5 systems.
36 */
37struct starfire_irqinfo {
38 unsigned long imap_slots[32];
39 unsigned long tregs[32];
40 struct starfire_irqinfo *next;
41 int upaid, hwmid;
42};
43
44static struct starfire_irqinfo *sflist = NULL;
45
46/* Beam me up Scott(McNeil)y... */
47void starfire_hookup(int upaid)
48{
49 struct starfire_irqinfo *p;
50 unsigned long treg_base, hwmid, i;
51
52 p = kmalloc(sizeof(*p), GFP_KERNEL);
53 if (!p) {
54 prom_printf("starfire_hookup: No memory, this is insane.\n");
55 prom_halt();
56 }
57 treg_base = 0x100fc000000UL;
58 hwmid = ((upaid & 0x3c) << 1) |
59 ((upaid & 0x40) >> 4) |
60 (upaid & 0x3);
61 p->hwmid = hwmid;
62 treg_base += (hwmid << 33UL);
63 treg_base += 0x200UL;
64 for (i = 0; i < 32; i++) {
65 p->imap_slots[i] = 0UL;
66 p->tregs[i] = treg_base + (i * 0x10UL);
67 /* Lets play it safe and not overwrite existing mappings */
68 if (upa_readl(p->tregs[i]) != 0)
69 p->imap_slots[i] = 0xdeadbeaf;
70 }
71 p->upaid = upaid;
72 p->next = sflist;
73 sflist = p;
74}
75
76unsigned int starfire_translate(unsigned long imap,
77 unsigned int upaid)
78{
79 struct starfire_irqinfo *p;
80 unsigned int bus_hwmid;
81 unsigned int i;
82
83 bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
84 for (p = sflist; p != NULL; p = p->next)
85 if (p->hwmid == bus_hwmid)
86 break;
87 if (p == NULL) {
88 prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
89 ((unsigned long)imap));
90 prom_halt();
91 }
92 for (i = 0; i < 32; i++) {
93 if (p->imap_slots[i] == imap ||
94 p->imap_slots[i] == 0UL)
95 break;
96 }
97 if (i == 32) {
98 printk("starfire_translate: Are you kidding me?\n");
99 panic("Lucy in the sky....");
100 }
101 p->imap_slots[i] = imap;
102
103 /* map to real upaid */
104 upaid = (((upaid & 0x3c) << 1) |
105 ((upaid & 0x40) >> 4) |
106 (upaid & 0x3));
107
108 upa_writel(upaid, p->tregs[i]);
109
110 return i;
111}