mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
![York Sun](/assets/img/avatar_default.png)
This function has been around for powerpc. It is used for systems with memory more than CONFIG_MAX_MEM_MAPPED. In case of non-contiguous memory, this feature can limit U-boot to one block without going over the limit. Signed-off-by: York Sun <yorksun@freescale.com> Acked-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
311 lines
6.7 KiB
C
311 lines
6.7 KiB
C
/*
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* (C) Copyright 2002-2007
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* Detlev Zundel, DENX Software Engineering, dzu@denx.de.
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*
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* Code used from linux/kernel/printk.c
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* Comments:
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*
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* After relocating the code, the environment variable "loglevel" is
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* copied to console_loglevel. The functionality is similar to the
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* handling in the Linux kernel, i.e. messages logged with a priority
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* less than console_loglevel are also output to stdout.
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*
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* If you want messages with the default level (e.g. POST messages) to
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* appear on stdout also, make sure the environment variable
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* "loglevel" is set at boot time to a number higher than
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* default_message_loglevel below.
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*/
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/*
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* Logbuffer handling routines
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*/
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#include <common.h>
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#include <command.h>
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#include <stdio_dev.h>
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#include <post.h>
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#include <logbuff.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* Local prototypes */
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static void logbuff_putc(const char c);
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static void logbuff_puts(const char *s);
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static int logbuff_printk(const char *line);
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static char buf[1024];
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/* This combination will not print messages with the default loglevel */
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static unsigned console_loglevel = 3;
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static unsigned default_message_loglevel = 4;
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static unsigned log_version = 1;
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#ifdef CONFIG_ALT_LB_ADDR
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static volatile logbuff_t *log;
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#else
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static logbuff_t *log;
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#endif
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static char *lbuf;
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unsigned long __logbuffer_base(void)
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{
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return CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - LOGBUFF_LEN;
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}
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unsigned long logbuffer_base(void)
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__attribute__((weak, alias("__logbuffer_base")));
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void logbuff_init_ptrs(void)
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{
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unsigned long tag, post_word;
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char *s;
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#ifdef CONFIG_ALT_LB_ADDR
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log = (logbuff_t *)CONFIG_ALT_LH_ADDR;
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lbuf = (char *)CONFIG_ALT_LB_ADDR;
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#else
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log = (logbuff_t *)(logbuffer_base()) - 1;
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lbuf = (char *)log->buf;
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#endif
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/* Set up log version */
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if ((s = getenv ("logversion")) != NULL)
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log_version = (int)simple_strtoul(s, NULL, 10);
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if (log_version == 2)
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tag = log->v2.tag;
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else
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tag = log->v1.tag;
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post_word = post_word_load();
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#ifdef CONFIG_POST
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/* The post routines have setup the word so we can simply test it */
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if (tag != LOGBUFF_MAGIC || (post_word & POST_COLDBOOT))
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logbuff_reset();
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#else
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/* No post routines, so we do our own checking */
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if (tag != LOGBUFF_MAGIC || post_word != LOGBUFF_MAGIC) {
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logbuff_reset ();
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post_word_store (LOGBUFF_MAGIC);
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}
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#endif
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if (log_version == 2 && (long)log->v2.start > (long)log->v2.con)
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log->v2.start = log->v2.con;
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/* Initialize default loglevel if present */
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if ((s = getenv ("loglevel")) != NULL)
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console_loglevel = (int)simple_strtoul(s, NULL, 10);
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gd->flags |= GD_FLG_LOGINIT;
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}
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void logbuff_reset(void)
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{
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#ifndef CONFIG_ALT_LB_ADDR
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memset(log, 0, sizeof(logbuff_t));
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#endif
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if (log_version == 2) {
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log->v2.tag = LOGBUFF_MAGIC;
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#ifdef CONFIG_ALT_LB_ADDR
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log->v2.start = 0;
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log->v2.con = 0;
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log->v2.end = 0;
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log->v2.chars = 0;
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#endif
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} else {
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log->v1.tag = LOGBUFF_MAGIC;
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#ifdef CONFIG_ALT_LB_ADDR
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log->v1.dummy = 0;
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log->v1.start = 0;
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log->v1.size = 0;
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log->v1.chars = 0;
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#endif
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}
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}
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int drv_logbuff_init(void)
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{
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struct stdio_dev logdev;
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int rc;
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/* Device initialization */
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memset (&logdev, 0, sizeof (logdev));
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strcpy (logdev.name, "logbuff");
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logdev.ext = 0; /* No extensions */
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logdev.flags = DEV_FLAGS_OUTPUT; /* Output only */
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logdev.putc = logbuff_putc; /* 'putc' function */
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logdev.puts = logbuff_puts; /* 'puts' function */
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rc = stdio_register(&logdev);
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return (rc == 0) ? 1 : rc;
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}
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static void logbuff_putc(const char c)
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{
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char buf[2];
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buf[0] = c;
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buf[1] = '\0';
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logbuff_printk(buf);
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}
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static void logbuff_puts(const char *s)
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{
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logbuff_printk (s);
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}
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void logbuff_log(char *msg)
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{
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if ((gd->flags & GD_FLG_LOGINIT)) {
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logbuff_printk(msg);
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} else {
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/*
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* Can happen only for pre-relocated errors as logging
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* at that stage should be disabled
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*/
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puts (msg);
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}
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}
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/*
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* Subroutine: do_log
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*
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* Description: Handler for 'log' command..
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*
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* Inputs: argv[1] contains the subcommand
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*
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* Return: None
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*
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*/
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int do_log(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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char *s;
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unsigned long i, start, size;
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if (strcmp(argv[1], "append") == 0) {
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/* Log concatenation of all arguments separated by spaces */
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for (i = 2; i < argc; i++) {
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logbuff_printk(argv[i]);
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logbuff_putc((i < argc - 1) ? ' ' : '\n');
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}
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return 0;
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}
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switch (argc) {
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case 2:
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if (strcmp(argv[1], "show") == 0) {
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if (log_version == 2) {
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start = log->v2.start;
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size = log->v2.end - log->v2.start;
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} else {
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start = log->v1.start;
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size = log->v1.size;
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}
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if (size > LOGBUFF_LEN)
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size = LOGBUFF_LEN;
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for (i = 0; i < size; i++) {
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s = lbuf + ((start + i) & LOGBUFF_MASK);
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putc(*s);
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}
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return 0;
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} else if (strcmp(argv[1], "reset") == 0) {
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logbuff_reset();
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return 0;
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} else if (strcmp(argv[1], "info") == 0) {
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printf("Logbuffer at %08lx\n", (unsigned long)lbuf);
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if (log_version == 2) {
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printf("log_start = %08lx\n",
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log->v2.start);
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printf("log_end = %08lx\n", log->v2.end);
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printf("log_con = %08lx\n", log->v2.con);
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printf("logged_chars = %08lx\n",
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log->v2.chars);
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}
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else {
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printf("log_start = %08lx\n",
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log->v1.start);
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printf("log_size = %08lx\n",
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log->v1.size);
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printf("logged_chars = %08lx\n",
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log->v1.chars);
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}
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return 0;
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}
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return CMD_RET_USAGE;
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default:
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return CMD_RET_USAGE;
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}
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}
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U_BOOT_CMD(
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log, 255, 1, do_log,
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"manipulate logbuffer",
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"info - show pointer details\n"
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"log reset - clear contents\n"
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"log show - show contents\n"
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"log append <msg> - append <msg> to the logbuffer"
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);
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static int logbuff_printk(const char *line)
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{
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int i;
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char *msg, *p, *buf_end;
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int line_feed;
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static signed char msg_level = -1;
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strcpy(buf + 3, line);
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i = strlen(line);
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buf_end = buf + 3 + i;
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for (p = buf + 3; p < buf_end; p++) {
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msg = p;
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if (msg_level < 0) {
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if (
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p[0] != '<' ||
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p[1] < '0' ||
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p[1] > '7' ||
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p[2] != '>'
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) {
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p -= 3;
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p[0] = '<';
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p[1] = default_message_loglevel + '0';
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p[2] = '>';
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} else {
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msg += 3;
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}
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msg_level = p[1] - '0';
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}
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line_feed = 0;
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for (; p < buf_end; p++) {
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if (log_version == 2) {
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lbuf[log->v2.end & LOGBUFF_MASK] = *p;
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log->v2.end++;
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if (log->v2.end - log->v2.start > LOGBUFF_LEN)
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log->v2.start++;
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log->v2.chars++;
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} else {
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lbuf[(log->v1.start + log->v1.size) &
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LOGBUFF_MASK] = *p;
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if (log->v1.size < LOGBUFF_LEN)
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log->v1.size++;
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else
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log->v1.start++;
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log->v1.chars++;
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}
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if (*p == '\n') {
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line_feed = 1;
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break;
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}
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}
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if (msg_level < console_loglevel) {
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printf("%s", msg);
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}
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if (line_feed)
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msg_level = -1;
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}
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return i;
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}
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