Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 161 insertions, 0 deletions

diff --git a/arch/sparc64/prom/p1275.c b/arch/sparc64/prom/p1275.c
new file mode 100644
index 0000000..59fe38b
--- /dev/null
+++ b/arch/sparc64/prom/p1275.c
@@ -0,0 +1,161 @@
+/* $Id: p1275.c,v 1.22 2001/10/18 09:40:00 davem Exp $
+ * p1275.c: Sun IEEE 1275 PROM low level interface routines
+ *
+ * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/system.h>
+#include <asm/spitfire.h>
+#include <asm/pstate.h>
+
+struct {
+	long prom_callback;			/* 0x00 */
+	void (*prom_cif_handler)(long *);	/* 0x08 */
+	unsigned long prom_cif_stack;		/* 0x10 */
+	unsigned long prom_args [23];		/* 0x18 */
+	char prom_buffer [3000];
+} p1275buf;
+
+extern void prom_world(int);
+
+extern void prom_cif_interface(void);
+extern void prom_cif_callback(void);
+
+static inline unsigned long spitfire_get_primary_context(void)
+{
+	unsigned long ctx;
+
+	__asm__ __volatile__("ldxa	[%1] %2, %0"
+			     : "=r" (ctx)
+			     : "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+	return ctx;
+}
+
+/*
+ * This provides SMP safety on the p1275buf. prom_callback() drops this lock
+ * to allow recursuve acquisition.
+ */
+DEFINE_SPINLOCK(prom_entry_lock);
+
+long p1275_cmd (char *service, long fmt, ...)
+{
+	char *p, *q;
+	unsigned long flags;
+	int nargs, nrets, i;
+	va_list list;
+	long attrs, x;
+	
+	p = p1275buf.prom_buffer;
+	BUG_ON((spitfire_get_primary_context() & CTX_NR_MASK) != 0);
+
+	spin_lock_irqsave(&prom_entry_lock, flags);
+
+	p1275buf.prom_args[0] = (unsigned long)p;		/* service */
+	strcpy (p, service);
+	p = (char *)(((long)(strchr (p, 0) + 8)) & ~7);
+	p1275buf.prom_args[1] = nargs = (fmt & 0x0f);		/* nargs */
+	p1275buf.prom_args[2] = nrets = ((fmt & 0xf0) >> 4); 	/* nrets */
+	attrs = fmt >> 8;
+	va_start(list, fmt);
+	for (i = 0; i < nargs; i++, attrs >>= 3) {
+		switch (attrs & 0x7) {
+		case P1275_ARG_NUMBER:
+			p1275buf.prom_args[i + 3] =
+						(unsigned)va_arg(list, long);
+			break;
+		case P1275_ARG_IN_64B:
+			p1275buf.prom_args[i + 3] =
+				va_arg(list, unsigned long);
+			break;
+		case P1275_ARG_IN_STRING:
+			strcpy (p, va_arg(list, char *));
+			p1275buf.prom_args[i + 3] = (unsigned long)p;
+			p = (char *)(((long)(strchr (p, 0) + 8)) & ~7);
+			break;
+		case P1275_ARG_OUT_BUF:
+			(void) va_arg(list, char *);
+			p1275buf.prom_args[i + 3] = (unsigned long)p;
+			x = va_arg(list, long);
+			i++; attrs >>= 3;
+			p = (char *)(((long)(p + (int)x + 7)) & ~7);
+			p1275buf.prom_args[i + 3] = x;
+			break;
+		case P1275_ARG_IN_BUF:
+			q = va_arg(list, char *);
+			p1275buf.prom_args[i + 3] = (unsigned long)p;
+			x = va_arg(list, long);
+			i++; attrs >>= 3;
+			memcpy (p, q, (int)x);
+			p = (char *)(((long)(p + (int)x + 7)) & ~7);
+			p1275buf.prom_args[i + 3] = x;
+			break;
+		case P1275_ARG_OUT_32B:
+			(void) va_arg(list, char *);
+			p1275buf.prom_args[i + 3] = (unsigned long)p;
+			p += 32;
+			break;
+		case P1275_ARG_IN_FUNCTION:
+			p1275buf.prom_args[i + 3] =
+					(unsigned long)prom_cif_callback;
+			p1275buf.prom_callback = va_arg(list, long);
+			break;
+		}
+	}
+	va_end(list);
+
+	prom_world(1);
+	prom_cif_interface();
+	prom_world(0);
+
+	attrs = fmt >> 8;
+	va_start(list, fmt);
+	for (i = 0; i < nargs; i++, attrs >>= 3) {
+		switch (attrs & 0x7) {
+		case P1275_ARG_NUMBER:
+			(void) va_arg(list, long);
+			break;
+		case P1275_ARG_IN_STRING:
+			(void) va_arg(list, char *);
+			break;
+		case P1275_ARG_IN_FUNCTION:
+			(void) va_arg(list, long);
+			break;
+		case P1275_ARG_IN_BUF:
+			(void) va_arg(list, char *);
+			(void) va_arg(list, long);
+			i++; attrs >>= 3;
+			break;
+		case P1275_ARG_OUT_BUF:
+			p = va_arg(list, char *);
+			x = va_arg(list, long);
+			memcpy (p, (char *)(p1275buf.prom_args[i + 3]), (int)x);
+			i++; attrs >>= 3;
+			break;
+		case P1275_ARG_OUT_32B:
+			p = va_arg(list, char *);
+			memcpy (p, (char *)(p1275buf.prom_args[i + 3]), 32);
+			break;
+		}
+	}
+	va_end(list);
+	x = p1275buf.prom_args [nargs + 3];
+
+	spin_unlock_irqrestore(&prom_entry_lock, flags);
+
+	return x;
+}
+
+void prom_cif_init(void *cif_handler, void *cif_stack)
+{
+	p1275buf.prom_cif_handler = (void (*)(long *))cif_handler;
+	p1275buf.prom_cif_stack = (unsigned long)cif_stack;
+}