patch-2.2.4 linux/arch/sparc64/kernel/starfire.c

• Lines: 122
• Date: Wed Mar 10 16:53:37 1999
• Orig file: v2.2.3/linux/arch/sparc64/kernel/starfire.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.3/linux/arch/sparc64/kernel/starfire.c linux/arch/sparc64/kernel/starfire.c
@@ -0,0 +1,121 @@
+/* $Id: starfire.c,v 1.2 1998/12/09 18:53:11 davem Exp $
+ * starfire.c: Starfire/E10000 support.
+ *
+ * Copyright (C) 1998 David S. Miller (davem@dm.cobaltmicro.com)
+ */
+
+#include <linux/kernel.h>
+#include <linux/malloc.h>
+
+#include <asm/page.h>
+#include <asm/oplib.h>
+#include <asm/smp.h>
+
+/* A few places around the kernel check this to see if
+ * they need to call us to do things in a Starfire specific
+ * way.
+ */
+int this_is_starfire = 0;
+
+void starfire_check(void)
+{
+	int ssnode = prom_finddevice("/ssp-serial");
+
+	if(ssnode != 0 && ssnode != -1) {
+		int i;
+
+		this_is_starfire = 1;
+
+		/* Now must fixup cpu MIDs.  OBP gave us a logical
+		 * linear cpuid number, not the real upaid.
+		 */
+		for(i = 0; i < linux_num_cpus; i++) {
+			unsigned int mid = linux_cpus[i].mid;
+
+			mid = (((mid & 0x3c) << 1) |
+			       ((mid & 0x40) >> 4) |
+			       (mid & 0x3));
+
+			linux_cpus[i].mid = mid;
+		}
+	}
+}
+
+int starfire_hard_smp_processor_id(void)
+{
+	return *((unsigned int *) __va(0x1fff40000d0));
+}
+
+/* Each Starfire board has 32 registers which perform translation
+ * and delivery of traditional interrupt packets into the extended
+ * Starfire hardware format.  Essentially UPAID's now have 2 more
+ * bits than in all previous Sun5 systems.
+ */
+struct starfire_irqinfo {
+	unsigned int *imap_slots[32];
+	unsigned int *tregs[32];
+	struct starfire_irqinfo *next;
+	int upaid, hwmid;
+};
+
+static struct starfire_irqinfo *sflist = NULL;
+
+/* Beam me up Scott(McNeil)y... */
+void *starfire_hookup(int upaid)
+{
+	struct starfire_irqinfo *p;
+	unsigned long treg_base, hwmid, i;
+
+	p = kmalloc(sizeof(*p), GFP_KERNEL);
+	if(!p) {
+		prom_printf("starfire_hookup: No memory, this is insane.\n");
+		prom_halt();
+	}
+	treg_base = 0x100fc000000UL;
+	hwmid = ((upaid & 0x3c) << 1) |
+		((upaid & 0x40) >> 4) |
+		(upaid & 0x3);
+	p->hwmid = hwmid;
+	treg_base += (hwmid << 33UL);
+	treg_base += 0x200UL;
+	for(i = 0; i < 32; i++) {
+		p->imap_slots[i] = NULL;
+		p->tregs[i] = __va(treg_base + (i * 0x10));
+	}
+	p->upaid = upaid;
+	p->next = sflist;
+	sflist = p;
+
+	return (void *) p;
+}
+
+unsigned int starfire_translate(unsigned int *imap,
+				unsigned int upaid)
+{
+	struct starfire_irqinfo *p;
+	unsigned int bus_hwmid;
+	unsigned int i;
+
+	bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
+	for(p = sflist; p != NULL; p = p->next)
+		if(p->hwmid == bus_hwmid)
+			break;
+	if(p == NULL) {
+		prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
+			    ((unsigned long)imap));
+		prom_halt();
+	}
+	for(i = 0; i < 32; i++) {
+		if(p->imap_slots[i] == imap ||
+		   p->imap_slots[i] == NULL)
+			break;
+	}
+	if(i == 32) {
+		printk("starfire_translate: Are you kidding me?\n");
+		panic("Lucy in the sky....");
+	}
+	p->imap_slots[i] = imap;
+	*(p->tregs[i]) = upaid;
+
+	return i;
+}