ARM: 8272/1: netx: Migrate DEBUG_LL macros to shared directory

As part of the migration we introduce DEBUG_UART_PHYS/DEBUG_UART_VIRT
which default to UART1 but allow a user to configure UART2 or UART3.
We also introduce symbolic names for the registers and flags.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Arnd Bergmann <arnd.bergmann@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/arm/include/debug/netx.S b/arch/arm/include/debug/netx.S
new file mode 100644
index 000000000000..81e1b2af70f7
--- /dev/null
+++ b/arch/arm/include/debug/netx.S
@@ -0,0 +1,36 @@
+/*
+ * Debugging macro include header
+ *
+ *  Copyright (C) 1994-1999 Russell King
+ *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * 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.
+ *
+*/
+
+#define UART_DATA 0
+#define UART_FLAG 0x18
+#define UART_FLAG_BUSY (1 << 3)
+
+                .macro  addruart, rp, rv, tmp
+                ldr     \rp, =CONFIG_DEBUG_UART_PHYS
+                ldr     \rv, =CONFIG_DEBUG_UART_VIRT
+                .endm
+
+                .macro  senduart,rd,rx
+                str     \rd, [\rx, #UART_DATA]
+                .endm
+
+                .macro  busyuart,rd,rx
+1002:           ldr     \rd, [\rx, #UART_FLAG]
+                tst     \rd, #UART_FLAG_BUSY
+                bne     1002b
+                .endm
+
+                .macro  waituart,rd,rx
+1001:           ldr     \rd, [\rx, #UART_FLAG]
+                tst     \rd, #UART_FLAG_BUSY
+                bne     1001b
+                .endm