ARM: add lolevel debug support for asm9260

Since there is no public documentation, this patch also provide register
offsets for different UART units on this SoC.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 29 insertions, 0 deletions

diff --git a/arch/arm/include/debug/asm9260.S b/arch/arm/include/debug/asm9260.S
new file mode 100644
index 000000000000..292f85b49fca
--- /dev/null
+++ b/arch/arm/include/debug/asm9260.S
@@ -0,0 +1,29 @@
+/* Debugging macro include header
+ *
+ *  Copyright (C) 1994-1999 Russell King
+ *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *  Modified for ASM9260 by Oleksij Remepl <linux@rempel-privat.de>
+ *
+ * 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, = CONFIG_DEBUG_UART_PHYS
+                ldr     \rv, = CONFIG_DEBUG_UART_VIRT
+                .endm
+
+                .macro  waituart,rd,rx
+                .endm
+
+                .macro  senduart,rd,rx
+                str     \rd, [\rx, #0x50]       @ TXDATA
+                .endm
+
+                .macro  busyuart,rd,rx
+1002:           ldr     \rd, [\rx, #0x60]       @ STAT
+                tst     \rd, #1 << 27           @ TXEMPTY
+                beq     1002b                   @ wait until transmit done
+                .endm