[U-Boot] [PATCH v4 07/15] Drop the log buffer

[Simon Glass <sjg@chromium.org>]

This does not appear to be used by any boards. Before introducing a new
log system, remove this old one.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

 cmd/Makefile                      |   1 -
 cmd/log.c                         | 313 --------------------------------------
 common/board_f.c                  |  18 ---
 common/board_r.c                  |  25 +--
 common/image.c                    |   9 --
 common/stdio.c                    |   6 -
 include/asm-generic/global_data.h |   2 +-
 include/logbuff.h                 |  49 ------
 include/post.h                    |   4 +-
 post/post.c                       |   9 --
 post/tests.c                      |   4 -
 scripts/config_whitelist.txt      |   1 -
 12 files changed, 5 insertions(+), 436 deletions(-)
 delete mode 100644 cmd/log.c
 delete mode 100644 include/logbuff.h

diff --git a/cmd/Makefile b/cmd/Makefile
index 2b0444d5b7..f9eb76090d 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -76,7 +76,6 @@ obj-$(CONFIG_LED_STATUS_CMD) += legacy_led.o
 obj-$(CONFIG_CMD_LED) += led.o
 obj-$(CONFIG_CMD_LICENSE) += license.o
 obj-y += load.o
-obj-$(CONFIG_LOGBUFFER) += log.o
 obj-$(CONFIG_ID_EEPROM) += mac.o
 obj-$(CONFIG_CMD_MD5SUM) += md5sum.o
 obj-$(CONFIG_CMD_MEMORY) += mem.o
diff --git a/cmd/log.c b/cmd/log.c
deleted file mode 100644
index 7a3bd5cd69..0000000000
--- a/cmd/log.c
+++ /dev/null
@@ -1,313 +0,0 @@
-/*
- * (C) Copyright 2002-2007
- * Detlev Zundel, DENX Software Engineering, dzu at 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(struct stdio_dev *dev, const char c);
-static void logbuff_puts(struct stdio_dev *dev, 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 */
-	s = env_get("logversion");
-	if (s)
-		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 */
-	s = env_get("loglevel");
-	if (s)
-		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(struct stdio_dev *dev, const char c)
-{
-	char buf[2];
-	buf[0] = c;
-	buf[1] = '\0';
-	logbuff_printk(buf);
-}
-
-static void logbuff_puts(struct stdio_dev *dev, 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[])
-{
-	struct stdio_dev *sdev = NULL;
-	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(sdev, (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  @ %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;
-}
diff --git a/common/board_f.c b/common/board_f.c
index 9220815441..1e8bf63ec1 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -19,7 +19,6 @@
 #include <i2c.h>
 #include <initcall.h>
 #include <init_helpers.h>
-#include <logbuff.h>
 #include <malloc.h>
 #include <mapmem.h>
 #include <os.h>
@@ -296,20 +295,6 @@ static int setup_dest_addr(void)
 	return 0;
 }
 
-#if defined(CONFIG_LOGBUFFER)
-static int reserve_logbuffer(void)
-{
-#ifndef CONFIG_ALT_LB_ADDR
-	/* reserve kernel log buffer */
-	gd->relocaddr -= LOGBUFF_RESERVE;
-	debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
-		gd->relocaddr);
-#endif
-
-	return 0;
-}
-#endif
-
 #ifdef CONFIG_PRAM
 /* reserve protected RAM */
 static int reserve_pram(void)
@@ -846,9 +831,6 @@ static const init_fnc_t init_sequence_f[] = {
 	 *  - board info struct
 	 */
 	setup_dest_addr,
-#if defined(CONFIG_LOGBUFFER)
-	reserve_logbuffer,
-#endif
 #ifdef CONFIG_PRAM
 	reserve_pram,
 #endif
diff --git a/common/board_r.c b/common/board_r.c
index a3b9bfb8ee..89729d7736 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -30,7 +30,6 @@
 #if defined(CONFIG_CMD_KGDB)
 #include <kgdb.h>
 #endif
-#include <logbuff.h>
 #include <malloc.h>
 #include <mapmem.h>
 #ifdef CONFIG_BITBANGMII
@@ -200,19 +199,6 @@ static int initr_addr_map(void)
 }
 #endif
 
-#ifdef CONFIG_LOGBUFFER
-unsigned long logbuffer_base(void)
-{
-	return gd->ram_top - LOGBUFF_LEN;
-}
-
-static int initr_logbuffer(void)
-{
-	logbuff_init_ptrs();
-	return 0;
-}
-#endif
-
 #ifdef CONFIG_POST
 static int initr_post_backlog(void)
 {
@@ -628,7 +614,7 @@ static int initr_ide(void)
 }
 #endif
 
-#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
+#if defined(CONFIG_PRAM)
 /*
  * Export available size of memory for Linux, taking into account the
  * protected RAM at top of memory
@@ -640,10 +626,6 @@ int initr_mem(void)
 
 # ifdef CONFIG_PRAM
 	pram = env_get_ulong("pram", 10, CONFIG_PRAM);
-# endif
-# if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
-	/* Also take the logbuffer into account (pram is in kB) */
-	pram += (LOGBUFF_LEN + LOGBUFF_OVERHEAD) / 1024;
 # endif
 	sprintf(memsz, "%ldk", (long int) ((gd->ram_size / 1024) - pram));
 	env_set("mem", memsz);
@@ -753,9 +735,6 @@ static init_fnc_t init_sequence_r[] = {
 	board_early_init_r,
 #endif
 	INIT_FUNC_WATCHDOG_RESET
-#ifdef CONFIG_LOGBUFFER
-	initr_logbuffer,
-#endif
 #ifdef CONFIG_POST
 	initr_post_backlog,
 #endif
@@ -877,7 +856,7 @@ static init_fnc_t init_sequence_r[] = {
 	INIT_FUNC_WATCHDOG_RESET
 	initr_bedbug,
 #endif
-#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
+#if defined(CONFIG_PRAM)
 	initr_mem,
 #endif
 #ifdef CONFIG_PS2KBD
diff --git a/common/image.c b/common/image.c
index 4ec4744589..4bcf6b3128 100644
--- a/common/image.c
+++ b/common/image.c
@@ -15,10 +15,6 @@
 #include <status_led.h>
 #endif
 
-#ifdef CONFIG_LOGBUFFER
-#include <logbuff.h>
-#endif
-
 #include <rtc.h>
 
 #include <environment.h>
@@ -1154,11 +1150,6 @@ int boot_ramdisk_high(struct lmb *lmb, ulong rd_data, ulong rd_len,
 	}
 
 
-#ifdef CONFIG_LOGBUFFER
-	/* Prevent initrd from overwriting logbuffer */
-	lmb_reserve(lmb, logbuffer_base() - LOGBUFF_OVERHEAD, LOGBUFF_RESERVE);
-#endif
-
 	debug("## initrd_high = 0x%08lx, copy_to_ram = %d\n",
 			initrd_high, initrd_copy_to_ram);
 
diff --git a/common/stdio.c b/common/stdio.c
index ee4f0bda9e..2e5143a025 100644
--- a/common/stdio.c
+++ b/common/stdio.c
@@ -17,9 +17,6 @@
 #include <malloc.h>
 #include <stdio_dev.h>
 #include <serial.h>
-#ifdef CONFIG_LOGBUFFER
-#include <logbuff.h>
-#endif
 
 #if defined(CONFIG_SYS_I2C)
 #include <i2c.h>
@@ -380,9 +377,6 @@ int stdio_add_devices(void)
 #endif /* CONFIG_DM_VIDEO */
 #if defined(CONFIG_KEYBOARD) && !defined(CONFIG_DM_KEYBOARD)
 	drv_keyboard_init ();
-#endif
-#ifdef CONFIG_LOGBUFFER
-	drv_logbuff_init ();
 #endif
 	drv_system_init ();
 	serial_stdio_init ();
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index 944f58195c..79197acfa4 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -36,7 +36,7 @@ typedef struct global_data {
 #if defined(CONFIG_LCD) || defined(CONFIG_VIDEO)
 	unsigned long fb_base;		/* Base address of framebuffer mem */
 #endif
-#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
+#if defined(CONFIG_POST)
 	unsigned long post_log_word;	/* Record POST activities */
 	unsigned long post_log_res;	/* success of POST test */
 	unsigned long post_init_f_time;	/* When post_init_f started */
diff --git a/include/logbuff.h b/include/logbuff.h
deleted file mode 100644
index 625feb9f95..0000000000
--- a/include/logbuff.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * (C) Copyright 2002-2007
- * Detlev Zundel, dzu at denx.de.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-#ifndef _LOGBUFF_H
-#define _LOGBUFF_H
-
-#ifdef CONFIG_LOGBUFFER
-
-#define LOGBUFF_MAGIC	0xc0de4ced	/* Forced by code, eh!	*/
-#define LOGBUFF_LEN	(16384)	/* Must be 16k right now */
-#define LOGBUFF_MASK	(LOGBUFF_LEN-1)
-#define LOGBUFF_OVERHEAD (4096) /* Logbuffer overhead for extra info */
-#define LOGBUFF_RESERVE (LOGBUFF_LEN+LOGBUFF_OVERHEAD)
-
-/* The mapping used here has to be the same as in setup_ext_logbuff ()
-   in linux/kernel/printk */
-
-typedef struct {
-	union {
-		struct {
-			unsigned long	tag;
-			unsigned long	start;
-			unsigned long	con;
-			unsigned long	end;
-			unsigned long	chars;
-		} v2;
-		struct {
-			unsigned long	dummy;
-			unsigned long	tag;
-			unsigned long	start;
-			unsigned long	size;
-			unsigned long	chars;
-		} v1;
-	};
-	unsigned char	buf[0];
-} logbuff_t;
-
-int drv_logbuff_init (void);
-void logbuff_init_ptrs (void);
-void logbuff_log(char *msg);
-void logbuff_reset (void);
-unsigned long logbuffer_base (void);
-
-#endif /* CONFIG_LOGBUFFER */
-
-#endif /* _LOGBUFF_H */
diff --git a/include/post.h b/include/post.h
index d5278111e8..b41a6c8127 100644
--- a/include/post.h
+++ b/include/post.h
@@ -15,7 +15,7 @@
 #include <common.h>
 #include <asm/io.h>
 
-#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
+#if defined(CONFIG_POST)
 
 #ifndef CONFIG_POST_EXTERNAL_WORD_FUNCS
 #ifdef CONFIG_SYS_POST_WORD_ADDR
@@ -58,7 +58,7 @@ extern ulong post_word_load(void);
 extern void post_word_store(ulong value);
 
 #endif /* CONFIG_POST_EXTERNAL_WORD_FUNCS */
-#endif /* defined (CONFIG_POST) || defined(CONFIG_LOGBUFFER) */
+#endif /* defined (CONFIG_POST) */
 #endif /* __ASSEMBLY__ */
 
 #ifdef CONFIG_POST
diff --git a/post/post.c b/post/post.c
index 8fef0c3412..6c7902ad0c 100644
--- a/post/post.c
+++ b/post/post.c
@@ -15,10 +15,6 @@
 #include <asm/gpio.h>
 #endif
 
-#ifdef CONFIG_LOGBUFFER
-#include <logbuff.h>
-#endif
-
 DECLARE_GLOBAL_DATA_PTR;
 
 #define POST_MAX_NUMBER		32
@@ -407,13 +403,8 @@ int post_log(char *format, ...)
 	vsprintf(printbuffer, format, args);
 	va_end(args);
 
-#ifdef CONFIG_LOGBUFFER
-	/* Send to the logbuffer */
-	logbuff_log(printbuffer);
-#else
 	/* Send to the stdout file */
 	puts(printbuffer);
-#endif
 
 	return 0;
 }
diff --git a/post/tests.c b/post/tests.c
index bc8e398051..473c0ea1e1 100644
--- a/post/tests.c
+++ b/post/tests.c
@@ -3,10 +3,6 @@
  * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
  *
  * SPDX-License-Identifier:	GPL-2.0+
- *
- * Be sure to mark tests to be run before relocation as such with the
- * CONFIG_SYS_POST_PREREL flag so that logging is done correctly if the
- * logbuffer support is enabled.
  */
 
 #include <common.h>
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index c2fe81e552..d5ae1f4685 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -1258,7 +1258,6 @@ CONFIG_LMS283GF05
 CONFIG_LOADADDR
 CONFIG_LOADCMD
 CONFIG_LOADS_ECHO
-CONFIG_LOGBUFFER
 CONFIG_LOWPOWER_ADDR
 CONFIG_LOWPOWER_FLAG
 CONFIG_LOW_MCFCLK
-- 
2.15.0.531.g2ccb3012c9-goog