Xtensa port: Added support for Xtensa simulator console driver.
Change-Id: I58effa98fd6ff53bcfd21cb8de2fcd89651dc1d9 Signed-off-by: Mazen NEIFER <mazen@nestwave.com>
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4 changed files with 105 additions and 1 deletions
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@ -2,6 +2,7 @@
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#
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# Copyright (c) 2014-2015 Wind River Systems, Inc.
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# Copyright (c) 2016 Cadence Design Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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@ -164,6 +165,22 @@ config UART_PIPE_ON_DEV_NAME
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This option specifies the name of UART device to be used
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for pipe UART.
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source "drivers/console/Kconfig.telnet"
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config XTENSA_SIM_CONSOLE
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bool
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prompt "Use Xtensa simulator console"
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depends on SIMULATOR_XTENSA
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select CONSOLE_HAS_DRIVER
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default y
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help
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Use simulator console to print messages.
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config XTENSA_CONSOLE_INIT_PRIORITY
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int
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prompt "Init priority"
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default 60
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depends on XTENSA_SIM_CONSOLE
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help
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Device driver initialization priority.
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source "drivers/console/Kconfig.telnet"
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endif
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@ -5,3 +5,4 @@ obj-$(CONFIG_IPM_CONSOLE_RECEIVER) += ipm_console_receiver.o
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obj-$(CONFIG_IPM_CONSOLE_SENDER) += ipm_console_sender.o
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obj-$(CONFIG_UART_PIPE) += uart_pipe.o
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obj-$(CONFIG_TELNET_CONSOLE) += telnet_console.o
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obj-$(CONFIG_XTENSA_SIM_CONSOLE) += xtensa_sim_console.o
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85
drivers/console/xtensa_sim_console.c
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85
drivers/console/xtensa_sim_console.c
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@ -0,0 +1,85 @@
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/*
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* Copyright (c) 2016 Cadence Design Systems, Inc.
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <xtensa/simcall.h>
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#include <device.h>
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#include <init.h>
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#if defined(CONFIG_PRINTK) || defined(CONFIG_STDOUT_CONSOLE)
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/**
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* @brief Output one character to SIMULATOR console
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* @param c Character to output
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* @return The character passed as input.
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*/
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static int console_out(int c)
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{
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char buf[16];
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register int a2 __asm__ ("a2") = SYS_write;
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register int a3 __asm__ ("a3") = 1;
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register char *a4 __asm__ ("a4") = buf;
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register int a5 __asm__ ("a5") = 1;
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register int ret_val __asm__ ("a2");
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register int ret_err __asm__ ("a3");
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buf[0] = (char)c;
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__asm__ ("simcall"
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: "=a" (ret_val), "=a" (ret_err)
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: "a" (a2), "a" (a3), "a" (a4), "a" (a5));
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return c;
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}
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#endif
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#if defined(CONFIG_STDOUT_CONSOLE)
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extern void __stdout_hook_install(int (*hook)(int));
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#else
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#define __stdout_hook_install(x) \
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do {/* nothing */ \
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} while ((0))
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#endif
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#if defined(CONFIG_PRINTK)
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extern void __printk_hook_install(int (*fn)(int));
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#else
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#define __printk_hook_install(x) \
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do {/* nothing */ \
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} while ((0))
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#endif
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/**
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*
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* @brief Install printk/stdout hook for Xtensa Simulator console output
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* @return N/A
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*/
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void xt_sim_console_hook_install(void)
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{
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__stdout_hook_install(console_out);
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__printk_hook_install(console_out);
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}
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/**
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*
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* @brief Initialize the console/debug port
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* @return 0 if successful, otherwise failed.
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*/
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static int xt_sim_console_init(struct device *arg)
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{
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ARG_UNUSED(arg);
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xt_sim_console_hook_install();
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return 0;
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}
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/* UART consloe initializes after the UART device itself */
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SYS_INIT(xt_sim_console_init,
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#if defined(CONFIG_EARLY_CONSOLE)
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PRIMARY,
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#else
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SECONDARY,
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#endif
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CONFIG_XTENSA_CONSOLE_INIT_PRIORITY);
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@ -2,6 +2,7 @@
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#
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# Copyright (c) 2014-2015 Wind River Systems, Inc.
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# Copyright (c) 2016 Cadence Design Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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