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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/mach-rpc/include/mach/io.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-rpc/include/mach/io.h')
-rw-r--r--arch/arm/mach-rpc/include/mach/io.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/mach-rpc/include/mach/io.h b/arch/arm/mach-rpc/include/mach/io.h
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-rpc/include/mach/io.h
+ *
+ * Copyright (C) 1997 Russell King
+ *
+ * Modifications:
+ * 06-Dec-1997 RMK Created.
+ */
+#ifndef __ASM_ARM_ARCH_IO_H
+#define __ASM_ARM_ARCH_IO_H
+
+#include <mach/hardware.h>
+
+#define IO_SPACE_LIMIT 0xffff
+
+/*
+ * We need PC style IO addressing for:
+ * - floppy (at 0x3f2,0x3f4,0x3f5,0x3f7)
+ * - parport (at 0x278-0x27a, 0x27b-0x27f, 0x778-0x77a)
+ * - 8250 serial (only for compile)
+ *
+ * These peripherals are found in an area of MMIO which looks very much
+ * like an ISA bus, but with registers at the low byte of each word.
+ */
+#define __io(a) (PCIO_BASE + ((a) << 2))
+
+#endif