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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-07-07 11:42:46 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-08-25 17:11:03 +0100
commit0b4cccbec60678212eccdb42dc1e1c233ddf7092 (patch)
tree6459ff818dec42f9e640bc3a6b4ab149f92b53cd /arch/arm/include
parent2facbc88733b34e1f992cde054c88b8e07607043 (diff)
ARM: debug: add support for word accesses to debug/8250.S
Add 32-bit word access support to debug/8250.S and convert Picoxcell and SoCFPGA to this. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/debug/8250.S24
-rw-r--r--arch/arm/include/debug/8250_32.S27
-rw-r--r--arch/arm/include/debug/picoxcell.S19
-rw-r--r--arch/arm/include/debug/socfpga.S21
4 files changed, 21 insertions, 70 deletions
diff --git a/arch/arm/include/debug/8250.S b/arch/arm/include/debug/8250.S
index 92cab395677a..7a2baf913aa0 100644
--- a/arch/arm/include/debug/8250.S
+++ b/arch/arm/include/debug/8250.S
@@ -14,14 +14,32 @@
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
- strb \rd, [\rx, #UART_TX << UART_SHIFT]
+ store \rd, [\rx, #UART_TX << UART_SHIFT]
.endm
.macro busyuart,rd,rx
-1002: ldrb \rd, [\rx, #UART_LSR << UART_SHIFT]
+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
@@ -29,7 +47,7 @@
.macro waituart,rd,rx
#ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL
-1001: ldrb \rd, [\rx, #UART_MSR << UART_SHIFT]
+1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]
tst \rd, #UART_MSR_CTS
beq 1001b
#endif
diff --git a/arch/arm/include/debug/8250_32.S b/arch/arm/include/debug/8250_32.S
deleted file mode 100644
index 8db01eeabbb4..000000000000
--- a/arch/arm/include/debug/8250_32.S
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright (c) 2011 Picochip Ltd., Jamie Iles
- *
- * 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.
- *
- * Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
- * accesses to the 8250.
- */
-
-#include <linux/serial_reg.h>
-
- .macro senduart,rd,rx
- str \rd, [\rx, #UART_TX << UART_SHIFT]
- .endm
-
- .macro busyuart,rd,rx
-1002: ldr \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
-
- /* The UART's don't have any flow control IO's wired up. */
- .macro waituart,rd,rx
- .endm
diff --git a/arch/arm/include/debug/picoxcell.S b/arch/arm/include/debug/picoxcell.S
deleted file mode 100644
index bc1f07c49cd4..000000000000
--- a/arch/arm/include/debug/picoxcell.S
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright (c) 2011 Picochip Ltd., Jamie Iles
- *
- * 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_SHIFT 2
-#define PICOXCELL_UART1_BASE 0x80230000
-#define PHYS_TO_IO(x) (((x) & 0x00ffffff) | 0xfe000000)
-
- .macro addruart, rp, rv, tmp
- ldr \rv, =PHYS_TO_IO(PICOXCELL_UART1_BASE)
- ldr \rp, =PICOXCELL_UART1_BASE
- .endm
-
-#include "8250_32.S"
diff --git a/arch/arm/include/debug/socfpga.S b/arch/arm/include/debug/socfpga.S
deleted file mode 100644
index 966b2f994946..000000000000
--- a/arch/arm/include/debug/socfpga.S
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * 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_SHIFT 2
-#define DEBUG_LL_UART_OFFSET 0x00002000
-
- .macro addruart, rp, rv, tmp
- mov \rp, #DEBUG_LL_UART_OFFSET
- orr \rp, \rp, #0x00c00000
- orr \rv, \rp, #0xfe000000 @ virtual base
- orr \rp, \rp, #0xff000000 @ physical base
- .endm
-
-#include "8250_32.S"
-