1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm26/lib/io-acorn.S b/arch/arm26/lib/io-acorn.S
new file mode 100644
index 00000000000..f6c3e30b1b4
--- /dev/null
+++ b/arch/arm26/lib/io-acorn.S
@@ -0,0 +1,71 @@
+/*
+ *  linux/arch/arm26/lib/io-acorn.S
+ *
+ *  Copyright (C) 1995, 1996 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h> /* for CONFIG_CPU_nn */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/hardware.h>
+
+		.text
+		.align
+
+		.equ	diff_pcio_base, PCIO_BASE - IO_BASE
+
+		.macro	outw2	rd
+		mov	r8, \rd, lsl #16
+		orr	r8, r8, r8, lsr #16
+		str	r8, [r3, r0, lsl #2]
+		mov	r8, \rd, lsr #16
+		orr	r8, r8, r8, lsl #16
+		str	r8, [r3, r0, lsl #2]
+		.endm
+
+		.macro	inw2	rd, mask, temp
+		ldr	\rd, [r0]
+		and	\rd, \rd, \mask
+		ldr	\temp, [r0]
+		orr	\rd, \rd, \temp, lsl #16
+		.endm
+
+		.macro	addr	rd
+		tst	\rd, #0x80000000
+		mov	\rd, \rd, lsl #2
+		add	\rd, \rd, #IO_BASE
+		addeq	\rd, \rd, #diff_pcio_base
+		.endm
+
+.iosl_warning:
+		.ascii	"<4>insl/outsl not implemented, called from %08lX\0"
+		.align
+
+/*
+ * These make no sense on Acorn machines.
+ * Print a warning message.
+ */
+ENTRY(insl)
+ENTRY(outsl)
+		adr	r0, .iosl_warning
+		mov	r1, lr
+		b	printk
+
+@ Purpose: write a memc register
+@ Proto  : void memc_write(int register, int value);
+@ Returns: nothing
+
+ENTRY(memc_write)
+		cmp	r0, #7
+		RETINSTR(movgt,pc,lr)
+		mov	r0, r0, lsl #17
+		mov	r1, r1, lsl #15
+		mov	r1, r1, lsr #17
+		orr	r0, r0, r1, lsl #2
+		add	r0, r0, #0x03600000
+		strb	r0, [r0]
+		RETINSTR(mov,pc,lr)
+