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-rw-r--r--kernel/arch/arm/include/debug/samsung.S87
1 files changed, 87 insertions, 0 deletions
diff --git a/kernel/arch/arm/include/debug/samsung.S b/kernel/arch/arm/include/debug/samsung.S
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index 000000000..8d8d922e5
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+++ b/kernel/arch/arm/include/debug/samsung.S
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+/* arch/arm/plat-samsung/include/plat/debug-macro.S
+ *
+ * Copyright 2005, 2007 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * 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_s3c.h>
+
+/* The S5PV210/S5PC110 implementations are as belows. */
+
+ .macro fifo_level_s5pv210 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ and \rd, \rd, #S5PV210_UFSTAT_TXMASK
+ .endm
+
+ .macro fifo_full_s5pv210 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ tst \rd, #S5PV210_UFSTAT_TXFULL
+ .endm
+
+/* The S3C2440 implementations are used by default as they are the
+ * most widely re-used */
+
+ .macro fifo_level_s3c2440 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ and \rd, \rd, #S3C2440_UFSTAT_TXMASK
+ .endm
+
+#ifndef fifo_level
+#define fifo_level fifo_level_s3c2440
+#endif
+
+ .macro fifo_full_s3c2440 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ tst \rd, #S3C2440_UFSTAT_TXFULL
+ .endm
+
+#ifndef fifo_full
+#define fifo_full fifo_full_s3c2440
+#endif
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, # S3C2410_UTXH]
+ .endm
+
+ .macro busyuart, rd, rx
+ ldr \rd, [\rx, # S3C2410_UFCON]
+ tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
+ beq 1001f @
+ @ FIFO enabled...
+1003:
+ fifo_full \rd, \rx
+ bne 1003b
+ b 1002f
+
+1001:
+ @ busy waiting for non fifo
+ ldr \rd, [\rx, # S3C2410_UTRSTAT]
+ tst \rd, #S3C2410_UTRSTAT_TXFE
+ beq 1001b
+
+1002: @ exit busyuart
+ .endm
+
+ .macro waituart,rd,rx
+ ldr \rd, [\rx, # S3C2410_UFCON]
+ tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
+ beq 1001f @
+ @ FIFO enabled...
+1003:
+ fifo_level \rd, \rx
+ teq \rd, #0
+ bne 1003b
+ b 1002f
+1001:
+ @ idle waiting for non fifo
+ ldr \rd, [\rx, # S3C2410_UTRSTAT]
+ tst \rd, #S3C2410_UTRSTAT_TXFE
+ beq 1001b
+
+1002: @ exit busyuart
+ .endm