[src/trunk]: src/sys/arch/amiga/amiga Include word access methods with stride 4.

[mhitch <mhitch%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/62b4b0f465f5
branches:  trunk
changeset: 481513:62b4b0f465f5
user:      mhitch <mhitch%NetBSD.org@localhost>
date:      Tue Feb 01 05:21:24 2000 +0000

description:
Include word access methods with stride 4.
Add a byte-swapping access_method array for use with MI wdc driver.
XXX Currently only read_multi_2 and write_multi_2 are used by MI wdc code;
XXX The other byte-swapping routines still need to be added.

diffstat:

 sys/arch/amiga/amiga/amiga_bus_simple_4.c |  82 ++++++++++++++++++++++++++++++-
 1 files changed, 81 insertions(+), 1 deletions(-)

diffs (94 lines):

diff -r 7c68438ea191 -r 62b4b0f465f5 sys/arch/amiga/amiga/amiga_bus_simple_4.c
--- a/sys/arch/amiga/amiga/amiga_bus_simple_4.c Tue Feb 01 05:13:17 2000 +0000
+++ b/sys/arch/amiga/amiga/amiga_bus_simple_4.c Tue Feb 01 05:21:24 2000 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: amiga_bus_simple_4.c,v 1.1 1999/12/30 20:56:44 is Exp $ */
+/* $NetBSD: amiga_bus_simple_4.c,v 1.2 2000/02/01 05:21:24 mhitch Exp $ */
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -37,4 +37,84 @@
  */
 
 #define AMIGA_SIMPLE_BUS_STRIDE 4              /* 1 byte per long */
+#define AMIGA_SIMPLE_BUS_WORD_METHODS
+
 #include "simple_busfuncs.c"
+
+/*
+ * Little-endian word methods.
+ * Stream access does not swap, used for 16-bit wide transfers of byte streams.
+ * Non-stream access swaps bytes.
+ * XXX Only *_multi_2 transfers currently swap bytes XXX
+ */
+
+bsrm(oabs(bsrm2_swap_), u_int16_t);
+bswm(oabs(bswm2_swap_), u_int16_t);
+
+void
+oabs(bsrm2_swap_)(handle, offset, pointer, count)
+       bus_space_handle_t handle;
+       bus_size_t offset;
+       u_int16_t *pointer;
+       bus_size_t count;
+{
+       volatile u_int16_t *p;
+
+       p = (volatile u_int16_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
+       
+       while (count > 0) {
+               *pointer++ = bswap16(*p);
+               --count;
+       }
+}
+
+void
+oabs(bswm2_swap_)(handle, offset, pointer, count)
+       bus_space_handle_t handle;
+       bus_size_t offset;
+       const u_int16_t *pointer;
+       bus_size_t count;
+{
+       volatile u_int16_t *p;
+
+       p = (volatile u_int16_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
+       
+       while (count > 0) {
+               *p = bswap16(*pointer);
+               ++pointer;
+               --count;
+       }
+}
+
+const struct amiga_bus_space_methods amiga_bus_stride_4swap = {
+
+        oabs(bsm_),
+        oabs(bsms_),
+        oabs(bsu_),
+        0,
+        0,
+ 
+        oabs(bsr1_),
+        oabs(bsw1_),
+        oabs(bsrm1_),
+        oabs(bswm1_),
+        oabs(bsrr1_),
+        oabs(bswr1_),
+        oabs(bssr1_),
+        oabs(bscr1_),
+
+        oabs(bsr2_),           /* XXX swap? */
+        oabs(bsw2_),           /* XXX swap? */
+        oabs(bsr2_),
+        oabs(bsw2_),
+        oabs(bsrm2_swap_),
+        oabs(bswm2_swap_),
+        oabs(bsrm2_),
+        oabs(bswm2_),
+        oabs(bsrr2_),          /* XXX swap? */
+        oabs(bswr2_),          /* XXX swap? */
+        oabs(bsrr2_),
+        oabs(bswr2_),
+        oabs(bssr2_),          /* XXX swap? */
+        oabs(bscr2_)           /* XXX swap? */
+};