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barebox/arch/mips/include/asm/debug_ll_ns16550.h

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MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
/*
* Copyright (C) 2012, 2013 Antony Pavlov <antonynpavlov@gmail.com>
*
* This file is part of barebox.
* See file CREDITS for list of people who contributed to this project.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
/** @file
* This file contains declaration for early output support
*/
#ifndef __INCLUDE_MIPS_ASM_DEBUG_LL_NS16550_H__
#define __INCLUDE_MIPS_ASM_DEBUG_LL_NS16550_H__
#ifdef CONFIG_DEBUG_LL
#ifndef DEBUG_LL_UART_ADDR
#error DEBUG_LL_UART_ADDR is undefined!
#endif
#ifndef DEBUG_LL_UART_SHIFT
#error DEBUG_LL_UART_SHIFT is undefined!
#endif
#ifndef DEBUG_LL_UART_DIVISOR
#error DEBUG_LL_UART_DIVISOR is undefined!
#endif
#endif /* CONFIG_DEBUG_LL */
#define UART_THR (0x0 << DEBUG_LL_UART_SHIFT)
MIPS: pbl: add nmon MIPS nano-monitor nmon is a tiny monitor (<1200 bytes) program for the MIPS processors. It can operate with NO working RAM at all! It uses only the processor registers and NS16550-compatible UART port for operation, so it can be used for a memory controller setup code debugging. With no changes nmon should work on different MIPS processors as it uses only common MIPS-I instructions. nmon is inspired by mmon, MIPS VR4300 Mini-monitor. mmon is copyrighted 1996, 2003 by Eric Smith. Also Alexander Voropay must be noted for his work on qemu & YAMON mmon adaptations made in 2006 and 2007. See http://www.brouhaha.com/~eric/software/mmon/ for mmon details. The mmon's features missed in nmon: * batch memory dumps; * byte and 16-bit half-words dumps and stores; * fill memory; * load S-records (this function make sense only if RAM works properly). nmon has only 4 commands: q - quit to barebox d <addr> - read 32-bit word from <addr> address w <addr> <val> - write 32-bit word <val> to <addr> g <addr> - jump to <addr> Addresses and data must be given in hexadecimal. Everything (including hex digits 'a'..'f') must be in lower case. EXAMPLE: change value of word with address 0xa0000000 nmon> d a0000000 00000000 nmon> w a0000000 12345678 nmon> d a0000000 12345678 nmon> There is no error checking of any kind. If you give an invalid address you will probably get an exception which will hang the board and you will have to press the reset button. You can interrupt current command (e.g. you have made error in input <addr> value) by pressing the <ESC> key. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-24 19:10:10 +00:00
#define UART_RBR (0x0 << DEBUG_LL_UART_SHIFT)
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
#define UART_DLL (0x0 << DEBUG_LL_UART_SHIFT)
#define UART_DLM (0x1 << DEBUG_LL_UART_SHIFT)
#define UART_LCR (0x3 << DEBUG_LL_UART_SHIFT)
#define UART_LSR (0x5 << DEBUG_LL_UART_SHIFT)
#define UART_LCR_W 0x07 /* Set UART to 8,N,2 & DLAB = 0 */
#define UART_LCR_DLAB 0x87 /* Set UART to 8,N,2 & DLAB = 1 */
MIPS: pbl: add nmon MIPS nano-monitor nmon is a tiny monitor (<1200 bytes) program for the MIPS processors. It can operate with NO working RAM at all! It uses only the processor registers and NS16550-compatible UART port for operation, so it can be used for a memory controller setup code debugging. With no changes nmon should work on different MIPS processors as it uses only common MIPS-I instructions. nmon is inspired by mmon, MIPS VR4300 Mini-monitor. mmon is copyrighted 1996, 2003 by Eric Smith. Also Alexander Voropay must be noted for his work on qemu & YAMON mmon adaptations made in 2006 and 2007. See http://www.brouhaha.com/~eric/software/mmon/ for mmon details. The mmon's features missed in nmon: * batch memory dumps; * byte and 16-bit half-words dumps and stores; * fill memory; * load S-records (this function make sense only if RAM works properly). nmon has only 4 commands: q - quit to barebox d <addr> - read 32-bit word from <addr> address w <addr> <val> - write 32-bit word <val> to <addr> g <addr> - jump to <addr> Addresses and data must be given in hexadecimal. Everything (including hex digits 'a'..'f') must be in lower case. EXAMPLE: change value of word with address 0xa0000000 nmon> d a0000000 00000000 nmon> w a0000000 12345678 nmon> d a0000000 12345678 nmon> There is no error checking of any kind. If you give an invalid address you will probably get an exception which will hang the board and you will have to press the reset button. You can interrupt current command (e.g. you have made error in input <addr> value) by pressing the <ESC> key. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-24 19:10:10 +00:00
#define UART_LSR_DR 0x01 /* UART received data present */
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
#define UART_LSR_THRE 0x20 /* Xmit holding register empty */
MIPS: unify ns16550 debug_ll support code This commit moves the C debug_ll code from the MIPS <debug_ll_ns16550.h> header file to the MIPS <asm/debug_ll_ns16550.h> header file, so the C code and the asm code can use the same register address macros. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-03 10:53:25 +00:00
#ifndef __ASSEMBLY__
/*
* C macros
*/
#include <asm/io.h>
static __inline__ void PUTC_LL(char ch)
{
MIPS: mach-xburst: fix DEBUG_LL=n build error Here is my error log: CC common/startup.o In file included from arch/mips/mach-xburst/include/mach/debug_ll.h:25, from include/debug_ll.h:31, from common/startup.c:36: arch/mips/include/asm/debug_ll_ns16550.h: In function 'PUTC_LL': arch/mips/include/asm/debug_ll_ns16550.h:62: error: 'DEBUG_LL_UART_ADDR' undeclared (first use in this function) arch/mips/include/asm/debug_ll_ns16550.h:62: error: (Each undeclared identifier is reported only once arch/mips/include/asm/debug_ll_ns16550.h:62: error: for each function it appears in.) make[1]: *** [common/startup.o] Error 1 Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2014-03-26 08:29:25 +00:00
#ifdef CONFIG_DEBUG_LL
MIPS: unify ns16550 debug_ll support code This commit moves the C debug_ll code from the MIPS <debug_ll_ns16550.h> header file to the MIPS <asm/debug_ll_ns16550.h> header file, so the C code and the asm code can use the same register address macros. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-03 10:53:25 +00:00
while (!(__raw_readb((u8 *)DEBUG_LL_UART_ADDR + UART_LSR) & UART_LSR_THRE))
;
__raw_writeb(ch, (u8 *)DEBUG_LL_UART_ADDR + UART_THR);
MIPS: mach-xburst: fix DEBUG_LL=n build error Here is my error log: CC common/startup.o In file included from arch/mips/mach-xburst/include/mach/debug_ll.h:25, from include/debug_ll.h:31, from common/startup.c:36: arch/mips/include/asm/debug_ll_ns16550.h: In function 'PUTC_LL': arch/mips/include/asm/debug_ll_ns16550.h:62: error: 'DEBUG_LL_UART_ADDR' undeclared (first use in this function) arch/mips/include/asm/debug_ll_ns16550.h:62: error: (Each undeclared identifier is reported only once arch/mips/include/asm/debug_ll_ns16550.h:62: error: for each function it appears in.) make[1]: *** [common/startup.o] Error 1 Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2014-03-26 08:29:25 +00:00
#endif /* CONFIG_DEBUG_LL */
MIPS: unify ns16550 debug_ll support code This commit moves the C debug_ll code from the MIPS <debug_ll_ns16550.h> header file to the MIPS <asm/debug_ll_ns16550.h> header file, so the C code and the asm code can use the same register address macros. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-03 10:53:25 +00:00
}
#else /* __ASSEMBLY__ */
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
/*
* Macros for use in assembly language code
*/
.macro debug_ll_ns16550_init
#ifdef CONFIG_DEBUG_LL
la t0, DEBUG_LL_UART_ADDR
li t1, UART_LCR_DLAB /* DLAB on */
sb t1, UART_LCR(t0) /* Write it out */
li t1, DEBUG_LL_UART_DIVISOR
sb t1, UART_DLL(t0) /* write low order byte */
srl t1, t1, 8
sb t1, UART_DLM(t0) /* write high order byte */
li t1, UART_LCR_W /* DLAB off */
sb t1, UART_LCR(t0) /* Write it out */
#endif /* CONFIG_DEBUG_LL */
.endm
/*
* output a character in a0
*/
MIPS: pbl: add nmon MIPS nano-monitor nmon is a tiny monitor (<1200 bytes) program for the MIPS processors. It can operate with NO working RAM at all! It uses only the processor registers and NS16550-compatible UART port for operation, so it can be used for a memory controller setup code debugging. With no changes nmon should work on different MIPS processors as it uses only common MIPS-I instructions. nmon is inspired by mmon, MIPS VR4300 Mini-monitor. mmon is copyrighted 1996, 2003 by Eric Smith. Also Alexander Voropay must be noted for his work on qemu & YAMON mmon adaptations made in 2006 and 2007. See http://www.brouhaha.com/~eric/software/mmon/ for mmon details. The mmon's features missed in nmon: * batch memory dumps; * byte and 16-bit half-words dumps and stores; * fill memory; * load S-records (this function make sense only if RAM works properly). nmon has only 4 commands: q - quit to barebox d <addr> - read 32-bit word from <addr> address w <addr> <val> - write 32-bit word <val> to <addr> g <addr> - jump to <addr> Addresses and data must be given in hexadecimal. Everything (including hex digits 'a'..'f') must be in lower case. EXAMPLE: change value of word with address 0xa0000000 nmon> d a0000000 00000000 nmon> w a0000000 12345678 nmon> d a0000000 12345678 nmon> There is no error checking of any kind. If you give an invalid address you will probably get an exception which will hang the board and you will have to press the reset button. You can interrupt current command (e.g. you have made error in input <addr> value) by pressing the <ESC> key. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-24 19:10:10 +00:00
.macro debug_ll_ns16550_outc_a0
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
#ifdef CONFIG_DEBUG_LL
MIPS: pbl: add nmon MIPS nano-monitor nmon is a tiny monitor (<1200 bytes) program for the MIPS processors. It can operate with NO working RAM at all! It uses only the processor registers and NS16550-compatible UART port for operation, so it can be used for a memory controller setup code debugging. With no changes nmon should work on different MIPS processors as it uses only common MIPS-I instructions. nmon is inspired by mmon, MIPS VR4300 Mini-monitor. mmon is copyrighted 1996, 2003 by Eric Smith. Also Alexander Voropay must be noted for his work on qemu & YAMON mmon adaptations made in 2006 and 2007. See http://www.brouhaha.com/~eric/software/mmon/ for mmon details. The mmon's features missed in nmon: * batch memory dumps; * byte and 16-bit half-words dumps and stores; * fill memory; * load S-records (this function make sense only if RAM works properly). nmon has only 4 commands: q - quit to barebox d <addr> - read 32-bit word from <addr> address w <addr> <val> - write 32-bit word <val> to <addr> g <addr> - jump to <addr> Addresses and data must be given in hexadecimal. Everything (including hex digits 'a'..'f') must be in lower case. EXAMPLE: change value of word with address 0xa0000000 nmon> d a0000000 00000000 nmon> w a0000000 12345678 nmon> d a0000000 12345678 nmon> There is no error checking of any kind. If you give an invalid address you will probably get an exception which will hang the board and you will have to press the reset button. You can interrupt current command (e.g. you have made error in input <addr> value) by pressing the <ESC> key. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-24 19:10:10 +00:00
.set push
.set reorder
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
la t0, DEBUG_LL_UART_ADDR
MIPS: pbl: add nmon MIPS nano-monitor nmon is a tiny monitor (<1200 bytes) program for the MIPS processors. It can operate with NO working RAM at all! It uses only the processor registers and NS16550-compatible UART port for operation, so it can be used for a memory controller setup code debugging. With no changes nmon should work on different MIPS processors as it uses only common MIPS-I instructions. nmon is inspired by mmon, MIPS VR4300 Mini-monitor. mmon is copyrighted 1996, 2003 by Eric Smith. Also Alexander Voropay must be noted for his work on qemu & YAMON mmon adaptations made in 2006 and 2007. See http://www.brouhaha.com/~eric/software/mmon/ for mmon details. The mmon's features missed in nmon: * batch memory dumps; * byte and 16-bit half-words dumps and stores; * fill memory; * load S-records (this function make sense only if RAM works properly). nmon has only 4 commands: q - quit to barebox d <addr> - read 32-bit word from <addr> address w <addr> <val> - write 32-bit word <val> to <addr> g <addr> - jump to <addr> Addresses and data must be given in hexadecimal. Everything (including hex digits 'a'..'f') must be in lower case. EXAMPLE: change value of word with address 0xa0000000 nmon> d a0000000 00000000 nmon> w a0000000 12345678 nmon> d a0000000 12345678 nmon> There is no error checking of any kind. If you give an invalid address you will probably get an exception which will hang the board and you will have to press the reset button. You can interrupt current command (e.g. you have made error in input <addr> value) by pressing the <ESC> key. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-24 19:10:10 +00:00
201: lbu t1, UART_LSR(t0) /* get line status */
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
andi t1, t1, UART_LSR_THRE /* check for transmitter empty */
MIPS: pbl: add nmon MIPS nano-monitor nmon is a tiny monitor (<1200 bytes) program for the MIPS processors. It can operate with NO working RAM at all! It uses only the processor registers and NS16550-compatible UART port for operation, so it can be used for a memory controller setup code debugging. With no changes nmon should work on different MIPS processors as it uses only common MIPS-I instructions. nmon is inspired by mmon, MIPS VR4300 Mini-monitor. mmon is copyrighted 1996, 2003 by Eric Smith. Also Alexander Voropay must be noted for his work on qemu & YAMON mmon adaptations made in 2006 and 2007. See http://www.brouhaha.com/~eric/software/mmon/ for mmon details. The mmon's features missed in nmon: * batch memory dumps; * byte and 16-bit half-words dumps and stores; * fill memory; * load S-records (this function make sense only if RAM works properly). nmon has only 4 commands: q - quit to barebox d <addr> - read 32-bit word from <addr> address w <addr> <val> - write 32-bit word <val> to <addr> g <addr> - jump to <addr> Addresses and data must be given in hexadecimal. Everything (including hex digits 'a'..'f') must be in lower case. EXAMPLE: change value of word with address 0xa0000000 nmon> d a0000000 00000000 nmon> w a0000000 12345678 nmon> d a0000000 12345678 nmon> There is no error checking of any kind. If you give an invalid address you will probably get an exception which will hang the board and you will have to press the reset button. You can interrupt current command (e.g. you have made error in input <addr> value) by pressing the <ESC> key. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-24 19:10:10 +00:00
beqz t1, 201b /* try again */
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
sb a0, UART_THR(t0) /* write the character */
MIPS: pbl: add nmon MIPS nano-monitor nmon is a tiny monitor (<1200 bytes) program for the MIPS processors. It can operate with NO working RAM at all! It uses only the processor registers and NS16550-compatible UART port for operation, so it can be used for a memory controller setup code debugging. With no changes nmon should work on different MIPS processors as it uses only common MIPS-I instructions. nmon is inspired by mmon, MIPS VR4300 Mini-monitor. mmon is copyrighted 1996, 2003 by Eric Smith. Also Alexander Voropay must be noted for his work on qemu & YAMON mmon adaptations made in 2006 and 2007. See http://www.brouhaha.com/~eric/software/mmon/ for mmon details. The mmon's features missed in nmon: * batch memory dumps; * byte and 16-bit half-words dumps and stores; * fill memory; * load S-records (this function make sense only if RAM works properly). nmon has only 4 commands: q - quit to barebox d <addr> - read 32-bit word from <addr> address w <addr> <val> - write 32-bit word <val> to <addr> g <addr> - jump to <addr> Addresses and data must be given in hexadecimal. Everything (including hex digits 'a'..'f') must be in lower case. EXAMPLE: change value of word with address 0xa0000000 nmon> d a0000000 00000000 nmon> w a0000000 12345678 nmon> d a0000000 12345678 nmon> There is no error checking of any kind. If you give an invalid address you will probably get an exception which will hang the board and you will have to press the reset button. You can interrupt current command (e.g. you have made error in input <addr> value) by pressing the <ESC> key. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-24 19:10:10 +00:00
.set pop
#endif /* CONFIG_DEBUG_LL */
.endm
/*
* output a character
*/
.macro debug_ll_ns16550_outc chr
#ifdef CONFIG_DEBUG_LL
li a0, \chr
debug_ll_ns16550_outc_a0
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
#endif /* CONFIG_DEBUG_LL */
.endm
/*
* output CR + NL
*/
.macro debug_ll_ns16550_outnl
#ifdef CONFIG_DEBUG_LL
debug_ll_ns16550_outc '\r'
debug_ll_ns16550_outc '\n'
#endif /* CONFIG_DEBUG_LL */
.endm
MIPS: pbl: add nmon MIPS nano-monitor nmon is a tiny monitor (<1200 bytes) program for the MIPS processors. It can operate with NO working RAM at all! It uses only the processor registers and NS16550-compatible UART port for operation, so it can be used for a memory controller setup code debugging. With no changes nmon should work on different MIPS processors as it uses only common MIPS-I instructions. nmon is inspired by mmon, MIPS VR4300 Mini-monitor. mmon is copyrighted 1996, 2003 by Eric Smith. Also Alexander Voropay must be noted for his work on qemu & YAMON mmon adaptations made in 2006 and 2007. See http://www.brouhaha.com/~eric/software/mmon/ for mmon details. The mmon's features missed in nmon: * batch memory dumps; * byte and 16-bit half-words dumps and stores; * fill memory; * load S-records (this function make sense only if RAM works properly). nmon has only 4 commands: q - quit to barebox d <addr> - read 32-bit word from <addr> address w <addr> <val> - write 32-bit word <val> to <addr> g <addr> - jump to <addr> Addresses and data must be given in hexadecimal. Everything (including hex digits 'a'..'f') must be in lower case. EXAMPLE: change value of word with address 0xa0000000 nmon> d a0000000 00000000 nmon> w a0000000 12345678 nmon> d a0000000 12345678 nmon> There is no error checking of any kind. If you give an invalid address you will probably get an exception which will hang the board and you will have to press the reset button. You can interrupt current command (e.g. you have made error in input <addr> value) by pressing the <ESC> key. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-24 19:10:10 +00:00
/*
* output a 32-bit value in hex
*/
.macro debug_ll_ns16550_outhexw
#ifdef CONFIG_DEBUG_LL
.set push
.set reorder
move t6, a0
li t5, 32
202:
addi t5, t5, -4
srlv a0, t6, t5
/* output one hex digit */
andi a0, a0, 15
blt a0, 10, 203f
addi a0, a0, ('a' - '9' - 1)
203:
addi a0, a0, '0'
debug_ll_ns16550_outc_a0
bgtz t5, 202b
.set pop
#endif /* CONFIG_DEBUG_LL */
.endm
/*
* check character in input buffer
* return value:
* v0 = 0 no character in input buffer
* v0 != 0 character in input buffer
*/
.macro debug_ll_ns16550_check_char
#ifdef CONFIG_DEBUG_LL
.set push
.set reorder
la t0, DEBUG_LL_UART_ADDR
/* get line status and check for data present */
lbu t1, UART_LSR(t0)
andi v0, t1, UART_LSR_DR
.set pop
#endif /* CONFIG_DEBUG_LL */
.endm
/*
* get character to v0
*/
.macro debug_ll_ns16550_getc
#ifdef CONFIG_DEBUG_LL
.set push
.set reorder
204:
debug_ll_ns16550_check_char
/* try again */
beqz v0, 204b
/* read a character */
lbu v0, UART_RBR(t0)
.set pop
#endif /* CONFIG_DEBUG_LL */
.endm
MIPS: unify ns16550 debug_ll support code This commit moves the C debug_ll code from the MIPS <debug_ll_ns16550.h> header file to the MIPS <asm/debug_ll_ns16550.h> header file, so the C code and the asm code can use the same register address macros. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-03 10:53:25 +00:00
#endif /* __ASSEMBLY__ */
MIPS: pbl: add low-level debug asm macros for ns16550 This patch adds macros for ns16550 port initialisation and single char output. The macros can be used in MIPS asm pbl code. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2013-06-01 07:52:45 +00:00
#endif /* __INCLUDE_MIPS_ASM_DEBUG_LL_NS16550_H__ */