| 1 | |
| 2 | |
| 3 | * starfire.c: Starfire/E10000 support.
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| 4 | *
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| 5 | * Copyright (C) 1998 David S. Miller ([email protected])
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| 6 | * Copyright (C) 2000 Anton Blanchard ([email protected])
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| 7 |
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| 8 |
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| 9 | #include <linux/kernel.h>
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| 10 | #include <linux/slab.h>
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| 11 |
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| 12 | #include <asm/page.h>
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| 13 | #include <asm/oplib.h>
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| 14 | #include <asm/smp.h>
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| 15 | #include <asm/upa.h>
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| 16 | #include <asm/starfire.h>
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| 17 |
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| 18 | |
| 19 | * A few places around the kernel check this to see if
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| 20 | * they need to call us to do things in a Starfire specific
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| 21 | * way.
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| 22 |
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| 23 | int this_is_starfire = 0;
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| 24 |
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| 25 | void check_if_starfire(void)
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| 26 | {
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| 27 | phandle ssnode = prom_finddevice("/ssp-serial");
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| 28 | if (ssnode != 0 && (s32)ssnode != -1)
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| 29 | this_is_starfire = 1;
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| 30 | }
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| 31 |
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| 32 | |
| 33 | * Each Starfire board has 32 registers which perform translation
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| 34 | * and delivery of traditional interrupt packets into the extended
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| 35 | * Starfire hardware format. Essentially UPAID's now have 2 more
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| 36 | * bits than in all previous Sun5 systems.
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| 37 |
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| 38 | struct starfire_irqinfo {
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| 39 | unsigned long imap_slots[32];
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| 40 | unsigned long tregs[32];
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| 41 | struct starfire_irqinfo *next;
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| 42 | int upaid, hwmid;
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| 43 | };
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| 44 |
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| 45 | static struct starfire_irqinfo *sflist = NULL;
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| 46 |
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| 47 |
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| 48 | void starfire_hookup(int upaid)
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| 49 | {
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| 50 | struct starfire_irqinfo *p;
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| 51 | unsigned long treg_base, hwmid, i;
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| 52 |
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| 53 | p = kmalloc_obj(*p);
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| 54 | if (!p) {
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| 55 | prom_printf("starfire_hookup: No memory, this is insane.\n");
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| 56 | prom_halt();
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| 57 | }
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| 58 | treg_base = 0x100fc000000UL;
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| 59 | hwmid = ((upaid & 0x3c) << 1) |
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| 60 | ((upaid & 0x40) >> 4) |
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| 61 | (upaid & 0x3);
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| 62 | p->hwmid = hwmid;
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| 63 | treg_base += (hwmid << 33UL);
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| 64 | treg_base += 0x200UL;
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| 65 | for (i = 0; i < 32; i++) {
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| 66 | p->imap_slots[i] = 0UL;
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| 67 | p->tregs[i] = treg_base + (i * 0x10UL);
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| 68 |
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| 69 | if (upa_readl(p->tregs[i]) != 0)
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| 70 | p->imap_slots[i] = 0xdeadbeaf;
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| 71 | }
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| 72 | p->upaid = upaid;
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| 73 | p->next = sflist;
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| 74 | sflist = p;
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| 75 | }
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| 76 |
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| 77 | unsigned int starfire_translate(unsigned long imap,
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| 78 | unsigned int upaid)
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| 79 | {
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| 80 | struct starfire_irqinfo *p;
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| 81 | unsigned int bus_hwmid;
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| 82 | unsigned int i;
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| 83 |
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| 84 | bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
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| 85 | for (p = sflist; p != NULL; p = p->next)
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| 86 | if (p->hwmid == bus_hwmid)
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| 87 | break;
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| 88 | if (p == NULL) {
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| 89 | prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
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| 90 | ((unsigned long)imap));
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| 91 | prom_halt();
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| 92 | }
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| 93 | for (i = 0; i < 32; i++) {
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| 94 | if (p->imap_slots[i] == imap ||
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| 95 | p->imap_slots[i] == 0UL)
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| 96 | break;
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| 97 | }
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| 98 | if (i == 32) {
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| 99 | printk("starfire_translate: Are you kidding me?\n");
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| 100 | panic("Lucy in the sky....");
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| 101 | }
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| 102 | p->imap_slots[i] = imap;
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| 103 |
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| 104 |
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| 105 | upaid = (((upaid & 0x3c) << 1) |
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| 106 | ((upaid & 0x40) >> 4) |
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| 107 | (upaid & 0x3));
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| 108 |
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| 109 | upa_writel(upaid, p->tregs[i]);
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| 110 |
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| 111 | return i;
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| 112 | }
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