diff options
| author | Shawn Guo <shawn.guo@freescale.com> | 2013-05-12 17:22:17 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2013-10-30 09:53:40 +0800 |
| commit | f12b16eb8f29afe0195877093f55f40a3351526e (patch) | |
| tree | 82d22fee94854bef1ddc93cf9136e15f26158a39 /arch/arm/include | |
| parent | 720cbc5c305dda4550dd799e1c6b187545391116 (diff) | |
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 <shawn.guo@freescale.com>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/debug/vf.S | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/include/debug/vf.S b/arch/arm/include/debug/vf.S new file mode 100644 index 000000000000..3791e5e7b6a6 --- /dev/null +++ b/arch/arm/include/debug/vf.S @@ -0,0 +1,26 @@ +/* + * Copyright (C) 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 |