patch-2.3.99-pre9 linux/arch/mips64/sgi-ip27/ip27-setup.c

• Lines: 174
• Date: Mon May 15 12:10:26 2000
• Orig file: v2.3.99-pre8/linux/arch/mips64/sgi-ip27/ip27-setup.c
• Orig date: Thu Mar 2 14:36:22 2000

diff -u --recursive --new-file v2.3.99-pre8/linux/arch/mips64/sgi-ip27/ip27-setup.c linux/arch/mips64/sgi-ip27/ip27-setup.c
@@ -1,4 +1,4 @@
-/* $Id: ip27-setup.c,v 1.6 2000/02/05 02:12:32 kanoj Exp $
+/* $Id: ip27-setup.c,v 1.7 2000/03/07 15:45:29 ralf Exp $
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -19,12 +19,25 @@
 #include <asm/sn/klconfig.h>
 #include <asm/ioc3.h>
 #include <asm/mipsregs.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/sn_private.h>
+#include <asm/pci/bridge.h>
+#include <asm/paccess.h>
+#include <asm/sn/sn0/ip27.h>
 
 /* Check against user dumbness.  */
 #ifdef CONFIG_VT
 #error CONFIG_VT not allowed for IP27.
 #endif
 
+#undef DEBUG_SETUP
+#ifdef DEBUG_SETUP
+#define DBG(x...) printk(x)
+#else
+#define DBG(x...)
+#endif
+
+
 /*
  * get_nasid() returns the physical node id number of the caller.
  */
@@ -84,12 +97,130 @@
 #endif
 }
 
+#define XBOW_WIDGET_PART_NUM    0x0
+#define XXBOW_WIDGET_PART_NUM   0xd000          /* Xbridge */
+#define BASE_XBOW_PORT  	8     /* Lowest external port */
+
+static void __init pcibr_setup(void)
+{
+	int 			i;
+	bridge_t 		*bridge; 
+	volatile u64 		hubreg;
+	nasid_t	 		nasid;
+	xwidget_part_num_t	partnum;
+	widgetreg_t 		widget_id;
+
+	num_bridges = 0;
+	/*
+	 * find what's on our local node
+	 */
+	nasid = 0;
+	hubreg = LOCAL_HUB_L(IIO_LLP_CSR);
+	if (hubreg & IIO_LLP_CSR_IS_UP) {
+		/* link is up */
+		widget_id = *(volatile widgetreg_t *)
+                        (RAW_NODE_SWIN_BASE(nasid, 0x0) + WIDGET_ID);
+		partnum = XWIDGET_PART_NUM(widget_id);
+		printk("pcibr_setup(): found partnum= 0x%x ", partnum);
+		if (partnum == BRIDGE_WIDGET_PART_NUM) {
+			/*
+			 * found direct connected bridge so must be Origin200
+			 */
+			printk("...is bridge\n");
+			num_bridges = 1;
+        		bus_to_wid[0] = 0x8;
+			bus_to_nid[0] = 0;
+		}
+		if (partnum == XBOW_WIDGET_PART_NUM) {
+			lboard_t *brd;
+			klxbow_t *xbow_p;
+			/*
+			 * found xbow, so may have multiple bridges
+			 * need to probe xbow
+			 */
+			printk("...is xbow\n");
+
+			if ((brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid),
+                                   KLTYPE_MIDPLANE8)) == NULL)
+				printk("argh\n");
+			else
+				printk("brd= 0x%x\n", brd);
+			if ((xbow_p = (klxbow_t *)
+			     find_component(brd, NULL, KLSTRUCT_XBOW)) == NULL)
+				printk("argh\n");
+			else {
+			   for (i=HUB_WIDGET_ID_MIN; i<=HUB_WIDGET_ID_MAX; i++) {
+				if (!XBOW_PORT_IS_ENABLED(xbow_p, i))
+					continue;
+				if (XBOW_PORT_TYPE_IO(xbow_p, i)) {
+				   widget_id = *(volatile widgetreg_t *)
+                        		   (RAW_NODE_SWIN_BASE(nasid, i) + WIDGET_ID);
+				   partnum = XWIDGET_PART_NUM(widget_id);
+				   if (partnum == BRIDGE_WIDGET_PART_NUM) {
+					printk("widget 0x%x is a bridge\n", i);
+					bus_to_wid[num_bridges] = i;
+					bus_to_nid[num_bridges] = nasid;
+					num_bridges++;
+				   }
+				}
+			   }
+			}
+		}
+		if (partnum == XXBOW_WIDGET_PART_NUM) {
+			/*
+			 * found xbridge, assume ibrick for now 
+			 */
+			printk("...is xbridge\n");
+        		bus_to_wid[0] = 0xb;
+        		bus_to_wid[1] = 0xe;
+        		bus_to_wid[2] = 0xf;
+
+        		bus_to_nid[0] = 0;
+        		bus_to_nid[1] = 0;
+        		bus_to_nid[2] = 0;
+
+			num_bridges = 3;
+		}
+	}
+	/*
+         * set bridge registers
+         */
+	for (i=0; i<num_bridges; i++) {
+		DBG("pcibr_setup: bus= %d  bus_to_wid[%2d]= %d  bus_to_nid[%2d]= %d\n",
+                        i, i, bus_to_wid[i], i, bus_to_nid[i]);
+
+		/*
+		 * point to this bridge
+		 */
+		bridge = (bridge_t *) NODE_SWIN_BASE(bus_to_nid[i],bus_to_wid[i]);
+		/*
+	 	 * Clear all pending interrupts.
+	 	 */
+		bridge->b_int_rst_stat = (BRIDGE_IRR_ALL_CLR);
+		/*
+	 	 * Until otherwise set up, assume all interrupts are from slot 0
+	 	 */
+		bridge->b_int_device = (u32) 0x0;
+		/*
+	 	 * swap pio's to pci mem and io space (big windows)
+	 	 */
+		bridge->b_wid_control |= BRIDGE_CTRL_IO_SWAP;
+		bridge->b_wid_control |= BRIDGE_CTRL_MEM_SWAP;
+
+		bridge->b_wid_tflush;     /* wait until Bridge PIO complete */
+	}
+}
+
 void __init ip27_setup(void)
 {
 	nasid_t nid;
 	hubreg_t p, e;
 
-	set_cp0_status(ST0_IM, 0);
+	/*
+	 * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
+	 */
+	DBG("ip27_setup(): Entered.\n");
+	per_cpu_init();
 	nid = get_nasid();
 	printk("IP27: Running on node %d.\n", nid);
 
@@ -108,4 +239,9 @@
 	verify_mode();
 	ioc3_sio_init();
 	ioc3_eth_init();
+
+	DBG("ip27_setup(): calling pcibr_setup\n");
+	/* set some bridge registers */
+	pcibr_setup();
+	DBG("ip27_setup(): Exit.\n");
 }