From c7c3eac6277bc60fb4472a16c5af5d54afc83596 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sun, 12 May 2013 17:22:17 +0800 Subject: ARM: imx: add low-level debug for vybrid Add low-level debug support for vybrid, so that earlyprintk can be enabled for debugging early boot issue. Signed-off-by: Shawn Guo --- arch/arm/include/debug/vf.S | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 arch/arm/include/debug/vf.S (limited to 'arch/arm/include') diff --git a/arch/arm/include/debug/vf.S b/arch/arm/include/debug/vf.S new file mode 100644 index 00000000000..ba12cc44b2c --- /dev/null +++ b/arch/arm/include/debug/vf.S @@ -0,0 +1,26 @@ +/* + * Copyright 2013 Freescale Semiconductor, Inc. + * + * 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. + * + */ + + .macro addruart, rp, rv, tmp + ldr \rp, =0x40028000 @ physical + ldr \rv, =0xfe028000 @ virtual + .endm + + .macro senduart, rd, rx + strb \rd, [\rx, #0x7] @ Data Register + .endm + + .macro busyuart, rd, rx +1001: ldrb \rd, [\rx, #0x4] @ Status Register 1 + tst \rd, #1 << 6 @ TC + beq 1001b @ wait until transmit done + .endm + + .macro waituart,rd,rx + .endm -- cgit v1.2.3