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linux-sg2042/arch/arm/include/debug/8250.S

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[ARM] Collect 8250-based debug implementations together Several ARM machine implementations used an 8250 compatible port for debugging purposes, and indepdently implemented the low level debug macros every time. Provide a common implementation and convert these implementations to use this version. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-17 04:40:25 +08:00
/*
ARM: debug: move 8250 debug include into arch/arm/include/debug/ Now that the 8250 debug include can stand alone without requiring platforms to provide any macros, move it into the debug directory so it can be directly included. This allows us to get rid of a lot of debug-macros include files. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-07-07 07:11:35 +08:00
* arch/arm/include/debug/8250.S
[ARM] Collect 8250-based debug implementations together Several ARM machine implementations used an 8250 compatible port for debugging purposes, and indepdently implemented the low level debug macros every time. Provide a common implementation and convert these implementations to use this version. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-17 04:40:25 +08:00
*
ARM: debug: provide 8250 debug uart phys/virt address configuration options Move the definition of the UART register addresses out of the platform specific header file into the Kconfig files. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-07-07 07:01:39 +08:00
* Copyright (C) 1994-2013 Russell King
[ARM] Collect 8250-based debug implementations together Several ARM machine implementations used an 8250 compatible port for debugging purposes, and indepdently implemented the low level debug macros every time. Provide a common implementation and convert these implementations to use this version. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-17 04:40:25 +08:00
*
* 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>
ARM: debug: provide 8250 debug uart phys/virt address configuration options Move the definition of the UART register addresses out of the platform specific header file into the Kconfig files. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-07-07 07:01:39 +08:00
.macro addruart, rp, rv, tmp
ldr \rp, =CONFIG_DEBUG_UART_PHYS
ldr \rv, =CONFIG_DEBUG_UART_VIRT
.endm
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>
2013-07-07 18:42:46 +08:00
#ifdef CONFIG_DEBUG_UART_8250_WORD
.macro store, rd, rx:vararg
ARM: debug: fix big endian operation for 8250 word mode If the 8250 debug code is used in word mode on an big endian host then the writes need to be change into little endian for the bus. Note, we have to re-convert the value back as the debug code will inspect the value after writing it to see if a newline has been written. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2015-03-25 19:27:46 +08:00
ARM_BE8(rev \rd, \rd)
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>
2013-07-07 18:42:46 +08:00
str \rd, \rx
ARM: debug: fix big endian operation for 8250 word mode If the 8250 debug code is used in word mode on an big endian host then the writes need to be change into little endian for the bus. Note, we have to re-convert the value back as the debug code will inspect the value after writing it to see if a newline has been written. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2015-03-25 19:27:46 +08:00
ARM_BE8(rev \rd, \rd)
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>
2013-07-07 18:42:46 +08:00
.endm
.macro load, rd, rx:vararg
ldr \rd, \rx
ARM: debug: fix big endian operation for 8250 word mode If the 8250 debug code is used in word mode on an big endian host then the writes need to be change into little endian for the bus. Note, we have to re-convert the value back as the debug code will inspect the value after writing it to see if a newline has been written. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2015-03-25 19:27:46 +08:00
ARM_BE8(rev \rd, \rd)
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>
2013-07-07 18:42:46 +08:00
.endm
#else
.macro store, rd, rx:vararg
strb \rd, \rx
.endm
.macro load, rd, rx:vararg
ldrb \rd, \rx
.endm
#endif
ARM: debug: provide 8250 debug uart register shift configuration option Move the definition of the UART register shift out of the platform specific header file into the Kconfig files. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-07-07 06:13:15 +08:00
#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
[ARM] Collect 8250-based debug implementations together Several ARM machine implementations used an 8250 compatible port for debugging purposes, and indepdently implemented the low level debug macros every time. Provide a common implementation and convert these implementations to use this version. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-17 04:40:25 +08:00
.macro senduart,rd,rx
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>
2013-07-07 18:42:46 +08:00
store \rd, [\rx, #UART_TX << UART_SHIFT]
[ARM] Collect 8250-based debug implementations together Several ARM machine implementations used an 8250 compatible port for debugging purposes, and indepdently implemented the low level debug macros every time. Provide a common implementation and convert these implementations to use this version. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-17 04:40:25 +08:00
.endm
.macro busyuart,rd,rx
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>
2013-07-07 18:42:46 +08:00
1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]
[ARM] Collect 8250-based debug implementations together Several ARM machine implementations used an 8250 compatible port for debugging purposes, and indepdently implemented the low level debug macros every time. Provide a common implementation and convert these implementations to use this version. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-17 04:40:25 +08:00
and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
bne 1002b
.endm
.macro waituart,rd,rx
ARM: debug: provide 8250 debug uart flow control configuration option Move the definition out of the machine class debug-macro.S header into the Kconfig files. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-07-07 05:59:10 +08:00
#ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL
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>
2013-07-07 18:42:46 +08:00
1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]
[ARM] Collect 8250-based debug implementations together Several ARM machine implementations used an 8250 compatible port for debugging purposes, and indepdently implemented the low level debug macros every time. Provide a common implementation and convert these implementations to use this version. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-17 04:40:25 +08:00
tst \rd, #UART_MSR_CTS
beq 1001b
#endif
.endm