mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-30 05:48:51 +09:00
![Simon Glass](/assets/img/avatar_default.png)
At present stdio device functions do not get any clue as to which stdio device is being acted on. Some implementations go to great lengths to work around this, such as defining a whole separate set of functions for each possible device. For driver model we need to associate a stdio_dev with a device. It doesn't seem possible to continue with this work-around approach. Instead, add a stdio_dev pointer to each of the stdio member functions. Note: The serial drivers have the same problem, but it is not strictly necessary to fix that to get driver model running. Also, if we convert serial over to driver model the problem will go away. Code size increases by 244 bytes for Thumb2 and 428 for PowerPC. 22: stdio: Pass device pointer to stdio methods arm: (for 2/2 boards) all +244.0 bss -4.0 text +248.0 powerpc: (for 1/1 boards) all +428.0 text +428.0 Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de> Reviewed-by: Marek Vasut <marex@denx.de>
312 lines
6.8 KiB
C
312 lines
6.8 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(struct stdio_dev *dev, const char c);
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static void logbuff_puts(struct stdio_dev *dev, 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(struct stdio_dev *dev, 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(struct stdio_dev *dev, 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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struct stdio_dev *sdev = NULL;
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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(sdev, (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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