--- /dev/null
+/*
+ * (C) Copyright 2002-2007
+ * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
+ *
+ * Code used from linux/kernel/printk.c
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * Comments:
+ *
+ * After relocating the code, the environment variable "loglevel" is
+ * copied to console_loglevel. The functionality is similar to the
+ * handling in the Linux kernel, i.e. messages logged with a priority
+ * less than console_loglevel are also output to stdout.
+ *
+ * If you want messages with the default level (e.g. POST messages) to
+ * appear on stdout also, make sure the environment variable
+ * "loglevel" is set at boot time to a number higher than
+ * default_message_loglevel below.
+ */
+
+/*
+ * Logbuffer handling routines
+ */
+
+#include <common.h>
+#include <command.h>
+#include <stdio_dev.h>
+#include <post.h>
+#include <logbuff.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Local prototypes */
+static void logbuff_putc(const char c);
+static void logbuff_puts(const char *s);
+static int logbuff_printk(const char *line);
+
+static char buf[1024];
+
+/* This combination will not print messages with the default loglevel */
+static unsigned console_loglevel = 3;
+static unsigned default_message_loglevel = 4;
+static unsigned log_version = 1;
+#ifdef CONFIG_ALT_LB_ADDR
+static volatile logbuff_t *log;
+#else
+static logbuff_t *log;
+#endif
+static char *lbuf;
+
+unsigned long __logbuffer_base(void)
+{
+ return CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - LOGBUFF_LEN;
+}
+unsigned long logbuffer_base(void)
+__attribute__((weak, alias("__logbuffer_base")));
+
+void logbuff_init_ptrs(void)
+{
+ unsigned long tag, post_word;
+ char *s;
+
+#ifdef CONFIG_ALT_LB_ADDR
+ log = (logbuff_t *)CONFIG_ALT_LH_ADDR;
+ lbuf = (char *)CONFIG_ALT_LB_ADDR;
+#else
+ log = (logbuff_t *)(logbuffer_base()) - 1;
+ lbuf = (char *)log->buf;
+#endif
+
+ /* Set up log version */
+ if ((s = getenv ("logversion")) != NULL)
+ log_version = (int)simple_strtoul(s, NULL, 10);
+
+ if (log_version == 2)
+ tag = log->v2.tag;
+ else
+ tag = log->v1.tag;
+ post_word = post_word_load();
+#ifdef CONFIG_POST
+ /* The post routines have setup the word so we can simply test it */
+ if (tag != LOGBUFF_MAGIC || (post_word & POST_COLDBOOT))
+ logbuff_reset();
+#else
+ /* No post routines, so we do our own checking */
+ if (tag != LOGBUFF_MAGIC || post_word != LOGBUFF_MAGIC) {
+ logbuff_reset ();
+ post_word_store (LOGBUFF_MAGIC);
+ }
+#endif
+ if (log_version == 2 && (long)log->v2.start > (long)log->v2.con)
+ log->v2.start = log->v2.con;
+
+ /* Initialize default loglevel if present */
+ if ((s = getenv ("loglevel")) != NULL)
+ console_loglevel = (int)simple_strtoul(s, NULL, 10);
+
+ gd->flags |= GD_FLG_LOGINIT;
+}
+
+void logbuff_reset(void)
+{
+#ifndef CONFIG_ALT_LB_ADDR
+ memset(log, 0, sizeof(logbuff_t));
+#endif
+ if (log_version == 2) {
+ log->v2.tag = LOGBUFF_MAGIC;
+#ifdef CONFIG_ALT_LB_ADDR
+ log->v2.start = 0;
+ log->v2.con = 0;
+ log->v2.end = 0;
+ log->v2.chars = 0;
+#endif
+ } else {
+ log->v1.tag = LOGBUFF_MAGIC;
+#ifdef CONFIG_ALT_LB_ADDR
+ log->v1.dummy = 0;
+ log->v1.start = 0;
+ log->v1.size = 0;
+ log->v1.chars = 0;
+#endif
+ }
+}
+
+int drv_logbuff_init(void)
+{
+ struct stdio_dev logdev;
+ int rc;
+
+ /* Device initialization */
+ memset (&logdev, 0, sizeof (logdev));
+
+ strcpy (logdev.name, "logbuff");
+ logdev.ext = 0; /* No extensions */
+ logdev.flags = DEV_FLAGS_OUTPUT; /* Output only */
+ logdev.putc = logbuff_putc; /* 'putc' function */
+ logdev.puts = logbuff_puts; /* 'puts' function */
+
+ rc = stdio_register(&logdev);
+
+ return (rc == 0) ? 1 : rc;
+}
+
+static void logbuff_putc(const char c)
+{
+ char buf[2];
+ buf[0] = c;
+ buf[1] = '\0';
+ logbuff_printk(buf);
+}
+
+static void logbuff_puts(const char *s)
+{
+ logbuff_printk (s);
+}
+
+void logbuff_log(char *msg)
+{
+ if ((gd->flags & GD_FLG_LOGINIT)) {
+ logbuff_printk(msg);
+ } else {
+ /*
+ * Can happen only for pre-relocated errors as logging
+ * at that stage should be disabled
+ */
+ puts (msg);
+ }
+}
+
+/*
+ * Subroutine: do_log
+ *
+ * Description: Handler for 'log' command..
+ *
+ * Inputs: argv[1] contains the subcommand
+ *
+ * Return: None
+ *
+ */
+int do_log(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ char *s;
+ unsigned long i, start, size;
+
+ if (strcmp(argv[1], "append") == 0) {
+ /* Log concatenation of all arguments separated by spaces */
+ for (i = 2; i < argc; i++) {
+ logbuff_printk(argv[i]);
+ logbuff_putc((i < argc - 1) ? ' ' : '\n');
+ }
+ return 0;
+ }
+
+ switch (argc) {
+
+ case 2:
+ if (strcmp(argv[1], "show") == 0) {
+ if (log_version == 2) {
+ start = log->v2.start;
+ size = log->v2.end - log->v2.start;
+ } else {
+ start = log->v1.start;
+ size = log->v1.size;
+ }
+ if (size > LOGBUFF_LEN)
+ size = LOGBUFF_LEN;
+ for (i = 0; i < size; i++) {
+ s = lbuf + ((start + i) & LOGBUFF_MASK);
+ putc(*s);
+ }
+ return 0;
+ } else if (strcmp(argv[1], "reset") == 0) {
+ logbuff_reset();
+ return 0;
+ } else if (strcmp(argv[1], "info") == 0) {
+ printf("Logbuffer at %08lx\n", (unsigned long)lbuf);
+ if (log_version == 2) {
+ printf("log_start = %08lx\n",
+ log->v2.start);
+ printf("log_end = %08lx\n", log->v2.end);
+ printf("log_con = %08lx\n", log->v2.con);
+ printf("logged_chars = %08lx\n",
+ log->v2.chars);
+ }
+ else {
+ printf("log_start = %08lx\n",
+ log->v1.start);
+ printf("log_size = %08lx\n",
+ log->v1.size);
+ printf("logged_chars = %08lx\n",
+ log->v1.chars);
+ }
+ return 0;
+ }
+ return CMD_RET_USAGE;
+
+ default:
+ return CMD_RET_USAGE;
+ }
+}
+
+U_BOOT_CMD(
+ log, 255, 1, do_log,
+ "manipulate logbuffer",
+ "info - show pointer details\n"
+ "log reset - clear contents\n"
+ "log show - show contents\n"
+ "log append <msg> - append <msg> to the logbuffer"
+);
+
+static int logbuff_printk(const char *line)
+{
+ int i;
+ char *msg, *p, *buf_end;
+ int line_feed;
+ static signed char msg_level = -1;
+
+ strcpy(buf + 3, line);
+ i = strlen(line);
+ buf_end = buf + 3 + i;
+ for (p = buf + 3; p < buf_end; p++) {
+ msg = p;
+ if (msg_level < 0) {
+ if (
+ p[0] != '<' ||
+ p[1] < '0' ||
+ p[1] > '7' ||
+ p[2] != '>'
+ ) {
+ p -= 3;
+ p[0] = '<';
+ p[1] = default_message_loglevel + '0';
+ p[2] = '>';
+ } else {
+ msg += 3;
+ }
+ msg_level = p[1] - '0';
+ }
+ line_feed = 0;
+ for (; p < buf_end; p++) {
+ if (log_version == 2) {
+ lbuf[log->v2.end & LOGBUFF_MASK] = *p;
+ log->v2.end++;
+ if (log->v2.end - log->v2.start > LOGBUFF_LEN)
+ log->v2.start++;
+ log->v2.chars++;
+ } else {
+ lbuf[(log->v1.start + log->v1.size) &
+ LOGBUFF_MASK] = *p;
+ if (log->v1.size < LOGBUFF_LEN)
+ log->v1.size++;
+ else
+ log->v1.start++;
+ log->v1.chars++;
+ }
+ if (*p == '\n') {
+ line_feed = 1;
+ break;
+ }
+ }
+ if (msg_level < console_loglevel) {
+ printf("%s", msg);
+ }
+ if (line_feed)
+ msg_level = -1;
+ }
+ return i;
+}
Code Review / kvmfornfv.git / blobdiff