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 int ssnode = prom_finddevice("/ssp-serial"); 27 if (ssnode != 0 && ssnode != -1) 28 this_is_starfire = 1; 29} 30 31int starfire_hard_smp_processor_id(void) 32{ 33 return upa_readl(0x1fff40000d0UL); 34} 35 36/* 37 * Each Starfire board has 32 registers which perform translation 38 * and delivery of traditional interrupt packets into the extended 39 * Starfire hardware format. Essentially UPAID's now have 2 more 40 * bits than in all previous Sun5 systems. 41 */ 42struct starfire_irqinfo { 43 unsigned long imap_slots[32]; 44 unsigned long tregs[32]; 45 struct starfire_irqinfo *next; 46 int upaid, hwmid; 47}; 48 49static struct starfire_irqinfo *sflist = NULL; 50 51/* Beam me up Scott(McNeil)y... */ 52void starfire_hookup(int upaid) 53{ 54 struct starfire_irqinfo *p; 55 unsigned long treg_base, hwmid, i; 56 57 p = kmalloc(sizeof(*p), GFP_KERNEL); 58 if (!p) { 59 prom_printf("starfire_hookup: No memory, this is insane.\n"); 60 prom_halt(); 61 } 62 treg_base = 0x100fc000000UL; 63 hwmid = ((upaid & 0x3c) << 1) | 64 ((upaid & 0x40) >> 4) | 65 (upaid & 0x3); 66 p->hwmid = hwmid; 67 treg_base += (hwmid << 33UL); 68 treg_base += 0x200UL; 69 for (i = 0; i < 32; i++) { 70 p->imap_slots[i] = 0UL; 71 p->tregs[i] = treg_base + (i * 0x10UL); 72 /* Lets play it safe and not overwrite existing mappings */ 73 if (upa_readl(p->tregs[i]) != 0) 74 p->imap_slots[i] = 0xdeadbeaf; 75 } 76 p->upaid = upaid; 77 p->next = sflist; 78 sflist = p; 79} 80 81unsigned int starfire_translate(unsigned long imap, 82 unsigned int upaid) 83{ 84 struct starfire_irqinfo *p; 85 unsigned int bus_hwmid; 86 unsigned int i; 87 88 bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f; 89 for (p = sflist; p != NULL; p = p->next) 90 if (p->hwmid == bus_hwmid) 91 break; 92 if (p == NULL) { 93 prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n", 94 ((unsigned long)imap)); 95 prom_halt(); 96 } 97 for (i = 0; i < 32; i++) { 98 if (p->imap_slots[i] == imap || 99 p->imap_slots[i] == 0UL) 100 break; 101 } 102 if (i == 32) { 103 printk("starfire_translate: Are you kidding me?\n"); 104 panic("Lucy in the sky...."); 105 } 106 p->imap_slots[i] = imap; 107 108 /* map to real upaid */ 109 upaid = (((upaid & 0x3c) << 1) | 110 ((upaid & 0x40) >> 4) | 111 (upaid & 0x3)); 112 113 upa_writel(upaid, p->tregs[i]); 114 115 return i; 116} 117