Add support for bus_space_write_region_[1248] bus_space_read_region_[1248]

as needed for some drivers, primarily drivers from NetBSD, where these
defines came from.

1 files changed, 125 insertions, 1 deletions

diff --git a/sys/arch/powerpc/include/bus.h b/sys/arch/powerpc/include/bus.h
index 366e63ba286..5ae28d7e150 100644
--- a/sys/arch/powerpc/include/bus.h
+++ b/sys/arch/powerpc/include/bus.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: bus.h,v 1.9 2000/11/11 17:27:45 drahn Exp $	*/
+/*	$OpenBSD: bus.h,v 1.10 2001/02/07 06:06:10 drahn Exp $	*/
 
 /*
  * Copyright (c) 1997 Per Fogelstrom.  All rights reserved.
@@ -137,6 +137,130 @@ bus_space_write_multi(4,32)
 
 #define	bus_space_write_multi_8	!!! bus_space_write_multi_8 not implemented !!!
 
+/*
+ *	void bus_space_read_region_N __P((bus_space_tag_t tag,
+ *	    bus_space_handle_t bsh, bus_size_t offset,
+ *	    u_intN_t *addr, size_t count));
+ *
+ * Read `count' 1, 2, 4, or 8 byte quantities from bus space
+ * described by tag/handle and starting at `offset' and copy into
+ * buffer provided.
+ */
+#define __BA(t, h, o) ((void *)((h) + (o)))
+
+static __inline void
+bus_space_read_region_1(tag, bsh, offset, addr, count)
+	bus_space_tag_t tag;
+	bus_space_handle_t bsh;
+	bus_size_t offset;
+	u_int8_t *addr;
+	size_t count;
+{
+	volatile u_int8_t *s = __BA(tag, bsh, offset);
+
+	while (count--)
+		*addr++ = *s++;
+	__asm __volatile("eieio; sync");
+}
+
+static __inline void
+bus_space_read_region_2(tag, bsh, offset, addr, count)
+	bus_space_tag_t tag;
+	bus_space_handle_t bsh;
+	bus_size_t offset;
+	u_int16_t *addr;
+	size_t count;
+{
+	volatile u_int16_t *s = __BA(tag, bsh, offset);
+
+	while (count--)
+		__asm __volatile("lhbrx %0, 0, %1" :
+			"=r"(*addr++) : "r"(s++));
+	__asm __volatile("eieio; sync");
+}
+
+static __inline void
+bus_space_read_region_4(tag, bsh, offset, addr, count)
+	bus_space_tag_t tag;
+	bus_space_handle_t bsh;
+	bus_size_t offset;
+	u_int32_t *addr;
+	size_t count;
+{
+	volatile u_int32_t *s = __BA(tag, bsh, offset);
+
+	while (count--)
+		__asm __volatile("lwbrx %0, 0, %1" :
+			"=r"(*addr++) : "r"(s++));
+	__asm __volatile("eieio; sync");
+}
+
+#if 0	/* Cause a link error for bus_space_read_region_8 */
+#define	bus_space_read_region_8		!!! unimplemented !!!
+#endif
+
+
+/*
+ *	void bus_space_write_region_N __P((bus_space_tag_t tag,
+ *	    bus_space_handle_t bsh, bus_size_t offset,
+ *	    const u_intN_t *addr, size_t count));
+ *
+ * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
+ * to bus space described by tag/handle starting at `offset'.
+ */
+
+static __inline void
+bus_space_write_region_1(tag, bsh, offset, addr, count)
+	bus_space_tag_t tag;
+	bus_space_handle_t bsh;
+	bus_size_t offset;
+	const u_int8_t *addr;
+	size_t count;
+{
+	volatile u_int8_t *d = __BA(tag, bsh, offset);
+
+	while (count--)
+		*d++ = *addr++;
+	__asm __volatile("eieio; sync");
+}
+
+static __inline void
+bus_space_write_region_2(tag, bsh, offset, addr, count)
+	bus_space_tag_t tag;
+	bus_space_handle_t bsh;
+	bus_size_t offset;
+	const u_int16_t *addr;
+	size_t count;
+{
+	volatile u_int16_t *d = __BA(tag, bsh, offset);
+
+	while (count--)
+		__asm __volatile("sthbrx %0, 0, %1" ::
+			"r"(*addr++), "r"(d++));
+	__asm __volatile("eieio; sync");
+}
+
+static __inline void
+bus_space_write_region_4(tag, bsh, offset, addr, count)
+	bus_space_tag_t tag;
+	bus_space_handle_t bsh;
+	bus_size_t offset;
+	const u_int32_t *addr;
+	size_t count;
+{
+	volatile u_int32_t *d = __BA(tag, bsh, offset);
+
+	while (count--)
+		__asm __volatile("stwbrx %0, 0, %1" ::
+			"r"(*addr++), "r"(d++));
+	__asm __volatile("eieio; sync");
+}
+
+#if 0
+#define	bus_space_write_region_8 !!! bus_space_write_region_8 unimplemented !!!
+#endif
+
+
 /* These are OpenBSD extensions to the general NetBSD bus interface.  */
 void
 bus_space_read_raw_multi_1(bus_space_tag_t bst, bus_space_handle_t bsh,