DM: add log macro/func and basic data structure.

also set default logger as console and enabled.

Tracked-On: #3012
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Yin Fengwei <fengwei.yin@intel.com>

devicemodel/Makefile

@@ -154,6 +154,9 @@ SRCS += arch/x86/pm.c
 SRCS += vmcfg/vmcfg.c
 SRCS += vmcfg/apl-mrb/vm1/vm1.c
 
+# log
+SRCS += log/log.c
+
 OBJS := $(patsubst %.c,$(DM_OBJDIR)/%.o,$(SRCS))
 
 VERSION_H := $(DM_OBJDIR)/include/version.h

devicemodel/include/log.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __LOG_H__
+#define __LOG_H__
+
+#include "types.h"
+
+/* Logging severity levels */
+#define LOG_ERROR		1U
+#define LOG_WARNING		2U
+#define LOG_NOTICE		3U
+#define LOG_INFO			4U
+#define LOG_DEBUG		5U
+
+#define DEFAULT_LOG_LEVEL         4
+#define MAX_ONE_LOG_SIZE     256
+
+struct logger_ops {
+	const char *name;
+	bool (*is_enabled)(void);
+	uint8_t (*get_log_level)(void);
+	int (*init)(bool enable, uint8_t log_level);
+	void (*deinit)(void);
+	void (*output)(const char *fmt, va_list args);
+};
+
+void init_logger_setting(const char *opt);
+void output_log(uint8_t level, const char *fmt, ...);
+
+/*
+ * Put all logger instances' addresses into one section named logger_dev_ops
+ * so that DM could enumerate and initialize each of them.
+ */
+#define DECLARE_LOGGER_SECTION()    SET_DECLARE(logger_dev_ops, struct logger_ops)
+#define DEFINE_LOGGER_DEVICE(x)    DATA_SET(logger_dev_ops, x)
+#define FOR_EACH_LOGGER(pp_logger)    SET_FOREACH(pp_logger, logger_dev_ops)
+
+
+#ifndef pr_prefix
+#define pr_prefix
+#endif
+
+#define pr_err(...) output_log(LOG_ERROR, pr_prefix __VA_ARGS__)
+#define pr_warn(...) output_log(LOG_WARNING, pr_prefix __VA_ARGS__)
+#define pr_notice(...) output_log(LOG_NOTICE, pr_prefix __VA_ARGS__)
+#define pr_info(...) output_log(LOG_INFO, pr_prefix __VA_ARGS__)
+#define pr_dbg(...) output_log(LOG_DEBUG, pr_prefix __VA_ARGS__)
+
+#endif /* __LOG_H__ */

devicemodel/log/log.c

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <paths.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <fcntl.h>
+
+#include "log.h"
+
+
+DECLARE_LOGGER_SECTION();
+
+/*
+ * --logger_setting: console,level=4;disk,level=4;kmsg,level=3
+ * the setting param is from acrn-dm input, will be parsed here
+ */
+void init_logger_setting(const char *opt)
+{
+
+}
+
+void output_log(uint8_t level, const char *fmt, ...)
+{
+	va_list args;
+	struct logger_ops **pp_logger, *logger;
+
+	/* check each logger flag and level, to output */
+	FOR_EACH_LOGGER(pp_logger) {
+		logger = *pp_logger;
+		if (logger->is_enabled() && (level <= logger->get_log_level()) && (logger->output)) {
+			va_start(args, fmt);
+			logger->output(fmt, args);
+			va_end(args);
+		}
+	}
+}
+
+/* console setting and its API interface */
+static uint8_t console_log_level = DEFAULT_LOG_LEVEL;
+static bool console_enabled = true;
+
+static bool is_console_enabled(void)
+{
+	return console_enabled;
+}
+
+static uint8_t get_console_log_level(void)
+{
+	return console_log_level;
+}
+
+static int init_console_setting(bool enable, uint8_t log_level)
+{
+	console_enabled = enable;
+	console_log_level = log_level;
+
+	return 0;
+}
+
+static void write_to_console(const char *fmt, va_list args)
+{
+	/* if no need add other info, just output */
+	vprintf(fmt, args);
+}
+
+struct logger_ops logger_console = {
+	.name = "console",
+	.is_enabled = is_console_enabled,
+	.get_log_level = get_console_log_level,
+	.init = init_console_setting,
+	.output = write_to_console,
+};
+
+
+DEFINE_LOGGER_DEVICE(logger_console);