1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/include/debug/imx.S b/arch/arm/include/debug/imx.S
new file mode 100644
index 000000000..bb7b95505
--- /dev/null
+++ b/arch/arm/include/debug/imx.S
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* arch/arm/mach-imx/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ *  Copyright (C) 1994-1999 Russell King
+ *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ */
+
+#include <asm/assembler.h>
+#include "imx-uart.h"
+
+/*
+ * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
+ * stay sync with that.  It's hard to maintain, and should be fixed
+ * globally for multi-platform build to use a fixed virtual address
+ * for low-level debug uart port across platforms.
+ */
+#define IMX_IO_P2V(x)	(						\
+			(((x) & 0x80000000) >> 7) |			\
+			(0xf4000000 +					\
+			(((x) & 0x50000000) >> 6) +			\
+			(((x) & 0x0b000000) >> 4) +			\
+			(((x) & 0x000fffff))))
+
+#define UART_VADDR	IMX_IO_P2V(UART_PADDR)
+
+		.macro	addruart, rp, rv, tmp
+		ldr	\rp, =UART_PADDR	@ physical
+		ldr	\rv, =UART_VADDR	@ virtual
+		.endm
+
+		.macro	senduart,rd,rx
+		ARM_BE8(rev \rd, \rd)
+		str	\rd, [\rx, #0x40]	@ TXDATA
+		.endm
+
+		.macro	waituartcts,rd,rx
+		.endm
+
+		.macro	waituarttxrdy,rd,rx
+		.endm
+
+		.macro	busyuart,rd,rx
+1002:		ldr	\rd, [\rx, #0x98]	@ SR2
+		ARM_BE8(rev \rd, \rd)
+		tst	\rd, #1 << 3		@ TXDC
+		beq	1002b			@ wait until transmit done
+		.endm