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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /* * Copyright (C) 1999, 2000 Ralf Baechle (ralf@gnu.org) * Copyright (C) 1999, 2000 Silcon Graphics, Inc. * Copyright (C) 2004 Christoph Hellwig. * Released under GPL v2. * * Generic XTALK initialization code */ #include <linux/init.h> #include <linux/kernel.h> #include <asm/sn/types.h> #include <asm/sn/klconfig.h> #include <asm/sn/hub.h> #include <asm/pci/bridge.h> #include <asm/xtalk/xtalk.h> #define XBOW_WIDGET_PART_NUM 0x0 #define XXBOW_WIDGET_PART_NUM 0xd000 /* Xbow in Xbridge */ #define BASE_XBOW_PORT 8 /* Lowest external port */ extern int bridge_probe(nasid_t nasid, int widget, int masterwid); static int __init probe_one_port(nasid_t nasid, int widget, int masterwid) { widgetreg_t widget_id; xwidget_part_num_t partnum; widget_id = *(volatile widgetreg_t *) (RAW_NODE_SWIN_BASE(nasid, widget) + WIDGET_ID); partnum = XWIDGET_PART_NUM(widget_id); printk(KERN_INFO "Cpu %d, Nasid 0x%x, widget 0x%x (partnum 0x%x) is ", smp_processor_id(), nasid, widget, partnum); switch (partnum) { case BRIDGE_WIDGET_PART_NUM: case XBRIDGE_WIDGET_PART_NUM: bridge_probe(nasid, widget, masterwid); break; default: break; } return 0; } static int __init xbow_probe(nasid_t nasid) { lboard_t *brd; klxbow_t *xbow_p; unsigned masterwid, i; printk("is xbow\n"); /* * found xbow, so may have multiple bridges * need to probe xbow */ brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_MIDPLANE8); if (!brd) return -ENODEV; xbow_p = (klxbow_t *)find_component(brd, NULL, KLSTRUCT_XBOW); if (!xbow_p) return -ENODEV; /* * Okay, here's a xbow. Lets arbitrate and find * out if we should initialize it. Set enabled * hub connected at highest or lowest widget as * master. */ #ifdef WIDGET_A i = HUB_WIDGET_ID_MAX + 1; do { i--; } while ((!XBOW_PORT_TYPE_HUB(xbow_p, i)) || (!XBOW_PORT_IS_ENABLED(xbow_p, i))); #else i = HUB_WIDGET_ID_MIN - 1; do { i++; } while ((!XBOW_PORT_TYPE_HUB(xbow_p, i)) || (!XBOW_PORT_IS_ENABLED(xbow_p, i))); #endif masterwid = i; if (nasid != XBOW_PORT_NASID(xbow_p, i)) return 1; for (i = HUB_WIDGET_ID_MIN; i <= HUB_WIDGET_ID_MAX; i++) { if (XBOW_PORT_IS_ENABLED(xbow_p, i) && XBOW_PORT_TYPE_IO(xbow_p, i)) probe_one_port(nasid, i, masterwid); } return 0; } void __init xtalk_probe_node(cnodeid_t nid) { volatile u64 hubreg; nasid_t nasid; xwidget_part_num_t partnum; widgetreg_t widget_id; nasid = COMPACT_TO_NASID_NODEID(nid); hubreg = REMOTE_HUB_L(nasid, IIO_LLP_CSR); /* check whether the link is up */ if (!(hubreg & IIO_LLP_CSR_IS_UP)) return; widget_id = *(volatile widgetreg_t *) (RAW_NODE_SWIN_BASE(nasid, 0x0) + WIDGET_ID); partnum = XWIDGET_PART_NUM(widget_id); printk(KERN_INFO "Cpu %d, Nasid 0x%x: partnum 0x%x is ", smp_processor_id(), nasid, partnum); switch (partnum) { case BRIDGE_WIDGET_PART_NUM: bridge_probe(nasid, 0x8, 0xa); break; case XBOW_WIDGET_PART_NUM: case XXBOW_WIDGET_PART_NUM: xbow_probe(nasid); break; default: printk(" unknown widget??\n"); break; } } |