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authorMasahiro Yamada <yamada.m@jp.panasonic.com>2014-09-01 11:06:32 +0900
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2014-10-26 22:21:59 +0100
commit1cfe9fa012da6c70402b5c2787414fd47fafb65f (patch)
tree4a741337ef555ab59bb97016a74cfd3c432aff49 /arch/arm/include/debug
parent5b3ee386fde82a1ba42ff09b95247842c9a1585e (diff)
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arm: debug: import debug files from Linux 3.16
U-Boot does not have arch/arm/kernel, include/uapi directories, This commit copies files as follows: Location in Linux -> Location in U-Boot arch/arm/kernel/debug.S -> arch/arm/lib/debug.S arch/arm/include/debug/8250.S -> arch/arm/include/debug/8250.S include/uapi/linux/serial_reg.h -> include/linux/serial_reg.h Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Diffstat (limited to 'arch/arm/include/debug')
-rw-r--r--arch/arm/include/debug/8250.S54
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/arm/include/debug/8250.S b/arch/arm/include/debug/8250.S
new file mode 100644
index 0000000..7a2baf9
--- /dev/null
+++ b/arch/arm/include/debug/8250.S
@@ -0,0 +1,54 @@
+/*
+ * arch/arm/include/debug/8250.S
+ *
+ * Copyright (C) 1994-2013 Russell King
+ *
+ * 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.
+ */
+#include <linux/serial_reg.h>
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT
+ .endm
+
+#ifdef CONFIG_DEBUG_UART_8250_WORD
+ .macro store, rd, rx:vararg
+ str \rd, \rx
+ .endm
+
+ .macro load, rd, rx:vararg
+ ldr \rd, \rx
+ .endm
+#else
+ .macro store, rd, rx:vararg
+ strb \rd, \rx
+ .endm
+
+ .macro load, rd, rx:vararg
+ ldrb \rd, \rx
+ .endm
+#endif
+
+#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
+
+ .macro senduart,rd,rx
+ store \rd, [\rx, #UART_TX << UART_SHIFT]
+ .endm
+
+ .macro busyuart,rd,rx
+1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]
+ and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ bne 1002b
+ .endm
+
+ .macro waituart,rd,rx
+#ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL
+1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]
+ tst \rd, #UART_MSR_CTS
+ beq 1001b
+#endif
+ .endm