* Improve log buffer code; use "loglevel" to decide which messages

  to log on the console, too (like in Linux); get rid of "logstart"

CHANGELOG

@@ -2,6 +2,12 @@
 Changes since for U-Boot 0.1.0:
 ======================================================================
 
+* Improve log buffer code; use "loglevel" to decide which messages
+  to log on the console, too (like in Linux); get rid of "logstart"
+
+* Add command line tool to access the U-Boot's environment
+  (board-specific for TRAB now, to be fixed later)
+
 * Patch by Hans-Joerg Frieden, 06 Dec 2002
   Fix misc problems with AmigaOne support
 

Makefile

@@ -658,6 +658,7 @@ clean:
 	rm -f tools/img2srec tools/mkimage tools/envcrc tools/gen_eth_addr
 	rm -f tools/easylogo/easylogo tools/bmp_logo
 	rm -f tools/gdb/astest tools/gdb/gdbcont tools/gdb/gdbsend
+	rm -f tools/env/fw_printenv tools/env/fw_setenv
 
 clobber:	clean
 	find . -type f \
@@ -667,7 +668,7 @@ clobber:	clean
 	rm -f $(OBJS) *.bak tags TAGS
 	rm -fr *.*~
 	rm -f u-boot u-boot.bin u-boot.elf u-boot.srec u-boot.map System.map
-	rm -f tools/crc32.c tools/environment.c
+	rm -f tools/crc32.c tools/environment.c tools/env/crc32.c
 	rm -f include/asm/arch include/asm
 
 mrproper \

common/cmd_bootm.c

@@ -51,6 +51,10 @@
 #include <asm/cache.h>
 #endif
 
+#ifdef CONFIG_LOGBUFFER
+#include <logbuff.h>
+#endif
+
 /*
  * Some systems (for example LWMON) have very short watchdog periods;
  * we must make sure to split long operations like memmove() or
@@ -357,19 +361,15 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 		 * turning the "load high" feature off. This is intentional.
 		 */
 		initrd_high = simple_strtoul(s, NULL, 16);
-	} else {			/* not set, no restrictions to load high */
+	} else {	/* not set, no restrictions to load high */
 		initrd_high = ~0;
 	}
 
 #ifdef CONFIG_LOGBUFFER
-	kbd=gd->bd;
-	if ((s = getenv ("logstart")) != NULL) {
-		kbd->bi_sramstart = simple_strtoul(s, NULL, 16);
-		/* Prevent initrd from overwriting logbuffer */
-		if (initrd_high < kbd->bi_sramstart)
-			initrd_high = kbd->bi_sramstart-1024;
-	}
-	debug ("## Logbuffer at 0x%08lX ", kbd->bi_sramstart);
+	/* Prevent initrd from overwriting logbuffer */
+	if (initrd_high < (kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD))
+		initrd_high = kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD;
+	debug ("## Logbuffer at 0x%08lX ", kbd->bi_memsize-LOGBUFF_LEN);
 #endif
 
 	/*

common/cmd_log.c

@@ -2,6 +2,9 @@
  * (C) Copyright 2002
  * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
  *
+ * Code used from linux/kernel/printk.c
+ * Copyright (C) 1991, 1992  Linus Torvalds
+ *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
@@ -19,6 +22,18 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
+ *
+ * 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.
  */
 
 /*
@@ -28,13 +43,11 @@
 #include <common.h>
 #include <command.h>
 #include <devices.h>
+#include <post.h>
 #include <logbuff.h>
 
 #if defined(CONFIG_LOGBUFFER)
 
-#define LOG_BUF_LEN	(16384)
-#define LOG_BUF_MASK	(LOG_BUF_LEN-1)
-
 /* Local prototypes */
 static void logbuff_putc (const char c);
 static void logbuff_puts (const char *s);
@@ -42,17 +55,44 @@ 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 long log_size;
-static unsigned char *log_buf=NULL;
-static unsigned long *ext_log_start, *ext_logged_chars;
+static unsigned char *log_buf = NULL;
+static unsigned long *ext_log_size;
+static unsigned long *ext_log_start;
+static unsigned long *ext_logged_chars;
+#define log_size (*ext_log_size)
 #define log_start (*ext_log_start)
 #define logged_chars (*ext_logged_chars)
 
 /* Forced by code, eh! */
 #define LOGBUFF_MAGIC 0xc0de4ced
 
+/* The mapping used here has to be the same as in setup_ext_logbuff ()
+   in linux/kernel/printk */
+void logbuff_init_ptrs (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	unsigned long *ext_tag;
+	char *s;
+
+	log_buf = (unsigned char *)(gd->bd->bi_memsize-LOGBUFF_LEN);
+	ext_tag = (unsigned long *)(log_buf)-4;
+	ext_log_start = (unsigned long *)(log_buf)-3;
+	ext_log_size = (unsigned long *)(log_buf)-2;
+	ext_logged_chars = (unsigned long *)(log_buf)-1;
+ 	if (*ext_tag!=LOGBUFF_MAGIC) {
+ 		logged_chars = log_size = log_start = 0;
+ 		*ext_tag = LOGBUFF_MAGIC;
+ 	}
+	/* Initialize default loglevel if present */
+	if ((s = getenv ("loglevel")) != NULL)
+		console_loglevel = (int)simple_strtoul (s, NULL, 10);
+
+	gd->post_log_word |= LOGBUFF_INITIALIZED;
+}
+
 int drv_logbuff_init (void)
 {
 	device_t logdev;
@@ -75,45 +115,26 @@ int drv_logbuff_init (void)
 static void logbuff_putc (const char c)
 {
 	char buf[2];
-	buf[0]=c;
-	buf[1]='\0';
-	logbuff_printk(buf);
+	buf[0] = c;
+	buf[1] = '\0';
+	logbuff_printk (buf);
 }
 
 static void logbuff_puts (const char *s)
 {
-	char buf[512];
-
-	sprintf(buf, "%s\n", s);
-	logbuff_printk(buf);
+	logbuff_printk (s);
 }
 
 void logbuff_log(char *msg)
 {
 	DECLARE_GLOBAL_DATA_PTR;
 
-	if ((gd->flags & GD_FLG_RELOC)&&(getenv ("logstart") != NULL)) {
-		logbuff_printk(msg);
+	if ((gd->post_log_word & LOGBUFF_INITIALIZED)) {
+		logbuff_printk (msg);
 	} else {
-		puts(msg);
-	}
-}
-
-void logbuff_reset (void)
-{
-	char *s;
-	unsigned long *ext_tag;
-
-	if ((s = getenv ("logstart")) != NULL) {
-		log_buf = (unsigned char *)simple_strtoul(s, NULL, 16);
-		ext_tag=(unsigned long *)(log_buf)-3;
-		ext_log_start=(unsigned long *)(log_buf)-2;
-		ext_logged_chars=(unsigned long *)(log_buf)-1;
-/*		if (*ext_tag!=LOGBUFF_MAGIC) {	*/
-			logged_chars=log_start=0;
-			*ext_tag=LOGBUFF_MAGIC;
-/*		}	*/
-		log_size=logged_chars;
+		/* Can happen only for pre-relocated errors as logging */
+		/* at that stage should be disabled                    */
+		puts (msg);
 	}
 }
 
@@ -132,34 +153,39 @@ int do_log (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	char *s;
 	unsigned long i;
 
-	if (log_buf==NULL) {
-		printf ("No logbuffer defined!  Set 'logstart' to use this feature.\n");
-		return 1;
+	if (strcmp(argv[1],"append") == 0) {
+		/* Log concatenation of all arguments separated by spaces */
+		for (i=2; i<argc; i++) {
+			if (i<argc-1) {
+				logbuff_printk (argv[i]);
+				logbuff_putc (' ');
+			} else {
+				logbuff_puts (argv[i]);
+			}
+		}
+		return 0;
 	}
 
 	switch (argc) {
 
 	case 2:
 		if (strcmp(argv[1],"show") == 0) {
-			for (i=0; i<logged_chars; i++) {
-				s=log_buf+((log_start+i)&LOG_BUF_MASK);
-				putc(*s);
+			for (i=0; i < (log_size&LOGBUFF_MASK); i++) {
+				s = log_buf+((log_start+i)&LOGBUFF_MASK);
+				putc (*s);
 			}
 			return 0;
 		} else if (strcmp(argv[1],"reset") == 0) {
-			log_start=0;
-			logged_chars=0;
-			log_size=0;
+			log_start    = 0;
+			log_size     = 0;
+			logged_chars = 0;
 			return 0;
-		}
-		printf ("Usage:\n%s\n", cmdtp->usage);
-		return 1;
-
-	case 3:
-		if (strcmp(argv[1],"append") == 0) {
-			logbuff_puts(argv[2]);
+		} else if (strcmp(argv[1],"info") == 0) {
+			printf ("Logbuffer   at  %08lx\n", (unsigned long)log_buf);
+			printf ("log_start    =  %08lx\n", log_start);
+			printf ("log_size     =  %08lx\n", log_size);
+			printf ("logged_chars =  %08lx\n", logged_chars);
 			return 0;
-
 		}
 		printf ("Usage:\n%s\n", cmdtp->usage);
 		return 1;
@@ -177,8 +203,8 @@ static int logbuff_printk(const char *line)
 	int line_feed;
 	static signed char msg_level = -1;
 
-	strcpy(buf + 3, line);
-	i = strlen(line);
+	strcpy (buf + 3, line);
+	i = strlen (line);
 	buf_end = buf + 3 + i;
 	for (p = buf + 3; p < buf_end; p++) {
 		msg = p;
@@ -199,8 +225,8 @@ static int logbuff_printk(const char *line)
 		}
 		line_feed = 0;
 		for (; p < buf_end; p++) {
-			log_buf[(log_start+log_size) & LOG_BUF_MASK] = *p;
-			if (log_size < LOG_BUF_LEN)
+			log_buf[(log_start+log_size) & LOGBUFF_MASK] = *p;
+			if (log_size < LOGBUFF_LEN)
 				log_size++;
 			else
 				log_start++;

include/asm-ppc/global_data.h

@@ -68,6 +68,9 @@ typedef	struct	global_data {
 #if defined(CONFIG_LCD) || defined(CONFIG_VIDEO)
 	unsigned long	fb_base;	/* Base address of framebuffer memory	*/
 #endif
+#ifdef CONFIG_POST
+	unsigned long	post_log_word;  /* Record POST activities */
+#endif
 #ifdef CONFIG_BOARD_TYPES
 	unsigned long	board_type;
 #endif

include/cmd_log.h

@@ -33,8 +33,9 @@
 #define LOG_BU_MASK ~(LOG_BUF_LEN-1)
 
 #define	CMD_TBL_LOG	MK_CMD_TBL_ENTRY(			\
-	"log",	3,	3,	1,	do_log,			\
+	"log",	3,     255,	1,	do_log,			\
 	"log     - manipulate logbuffer\n",                     \
+	"log info   - show pointer details\n"			\
 	"log reset  - clear contents\n"				\
 	"log show   - show contents\n"				\
 	"log append <msg> - append <msg> to the logbuffer\n"	\

include/configs/lwmon.h

@@ -31,11 +31,6 @@
 /* External logbuffer support */
 #define CONFIG_LOGBUFFER
 
-/* Reserve space for the logbuffer */
-#ifdef CONFIG_LOGBUFFER
-#define CONFIG_PRAM 20
-#endif
-
 /*
  * High Level Configuration Options
  * (easy to change)

include/logbuff.h

@@ -25,9 +25,15 @@
 
 #ifdef CONFIG_LOGBUFFER
 
-#define LOGBUFF_TEST0	0x01
+#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)
+
+#define LOGBUFF_INITIALIZED	(1<<31)
 
 int drv_logbuff_init (void);
+void logbuff_init_ptrs (void);
 void logbuff_log(char *msg);
 void logbuff_reset (void);
 

include/post.h

@@ -38,6 +38,7 @@
 #define POST_RAM		0x0200	/* test runs in RAM */
 #define POST_MANUAL		0x0400	/* test runs on diag command */
 #define POST_REBOOT		0x0800	/* test may cause rebooting */
+#define POST_PREREL             0x1000  /* test runs before relocation */
 
 #define POST_MEM		(POST_RAM | POST_ROM)
 #define POST_ALWAYS		(POST_POWERNORMAL | \
@@ -53,10 +54,12 @@ struct post_test {
 	char *desc;
 	int flags;
 	int (*test) (int flags);
+	unsigned long testid;
 };
 void post_bootmode_init (void);
 int post_bootmode_get (unsigned int * last_test);
 void post_bootmode_clear (void);
+void post_output_backlog ( void );
 int post_run (char *name, int flags);
 int post_info (char *name);
 int post_log (char *format, ...);

lib_ppc/board.c

@@ -362,6 +362,7 @@ void board_init_f (ulong bootflag)
 	 * relocate the code and continue running from DRAM.
 	 *
 	 * Reserve memory at end of RAM for (top down in that order):
+         *  - kernel log buffer
 	 *  - protected RAM
 	 *  - LCD framebuffer
 	 *  - monitor code
@@ -386,6 +387,14 @@ void board_init_f (ulong bootflag)
 	       (gd->ram_size > 256 << 20) ? 256 << 20 : gd->ram_size;
 #endif
 
+#ifdef CONFIG_LOGBUFFER
+	/* reserve kernel log buffer */
+	addr -= (LOGBUFF_RESERVE);
+# ifdef DEBUG
+	printf ("Reserving %ldk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
+# endif
+#endif
+
 #ifdef CONFIG_PRAM
 	/*
 	 * reserve protected RAM
@@ -613,9 +622,10 @@ void board_init_r (gd_t *id, ulong dest_addr)
 	WATCHDOG_RESET ();
 
 #ifdef CONFIG_LOGBUFFER
-	logbuff_reset ();
+	logbuff_init_ptrs ();
 #endif
 #ifdef CONFIG_POST
+	post_output_backlog ();
 	post_reloc ();
 #endif
 
@@ -929,21 +939,29 @@ void board_init_r (gd_t *id, ulong dest_addr)
 	bedbug_init ();
 #endif
 
-#ifdef CONFIG_PRAM
+#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
 	/*
 	 * Export available size of memory for Linux,
 	 * taking into account the protected RAM at top of memory
 	 */
 	{
 		ulong pram;
-		char *s;
 		uchar memsz[32];
+#ifdef CONFIG_PRAM
+		char *s;
 
 		if ((s = getenv ("pram")) != NULL) {
 			pram = simple_strtoul (s, NULL, 10);
 		} else {
 			pram = CONFIG_PRAM;
 		}
+#else
+		pram=0;
+#endif
+#ifdef CONFIG_LOGBUFFER
+		/* Also take the logbuffer into account (pram is in kB) */
+		pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
+#endif
 		sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
 		setenv ("mem", memsz);
 	}

post/post.c

@@ -38,6 +38,7 @@
 
 void post_bootmode_init (void)
 {
+	DECLARE_GLOBAL_DATA_PTR;
 	int bootmode = post_bootmode_get (0);
 
 	if (bootmode == 0) {
@@ -49,6 +50,8 @@ void post_bootmode_init (void)
 	}
 
 	post_word_store (BOOTMODE_MAGIC | bootmode);
+	/* Reset activity record */
+	gd->post_log_word = 0;
 }
 
 int post_bootmode_get (unsigned int *last_test)
@@ -74,6 +77,36 @@ void post_bootmode_clear (void)
 	post_word_store (0);
 }
 
+/* POST tests run before relocation only mark status bits .... */
+static void post_log_mark_start ( unsigned long testid )
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	gd->post_log_word |= (testid)<<16;
+}
+
+static void post_log_mark_succ ( unsigned long testid )
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	gd->post_log_word |= testid;
+}
+
+/* ... and the messages are output once we are relocated */
+void post_output_backlog ( void )
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	int j;
+
+	for (j = 0; j < post_list_size; j++) {
+		if (gd->post_log_word & (post_list[j].testid<<16)) {
+			post_log ("POST %s ", post_list[j].cmd);
+			if (gd->post_log_word & post_list[j].testid)
+				post_log ("PASSED\n");
+			else
+				post_log ("FAILED\n");
+		}
+	}
+}
+
 static void post_bootmode_test_on (unsigned int last_test)
 {
 	unsigned long word = post_word_load ();
@@ -160,13 +193,21 @@ static int post_run_single (struct post_test *test,
 				post_bootmode_test_on (i);
 			}
 
+			if (test_flags & POST_PREREL)
+				post_log_mark_start ( test->testid );
+			else
 			post_log ("POST %s ", test->cmd);
 		}
 
+		if (test_flags & POST_PREREL) {
+			if ((*test->test) (flags) == 0)
+				post_log_mark_succ ( test->testid );
+		} else {
 		if ((*test->test) (flags) != 0)
 			post_log ("FAILED\n");
 		else
 			post_log ("PASSED\n");
+		}
 
 		if ((test_flags & POST_REBOOT) && !(flags & POST_MANUAL)) {
 			post_bootmode_test_off ();
@@ -282,6 +323,7 @@ int post_log (char *format, ...)
 	va_end (args);
 
 #ifdef CONFIG_LOGBUFFER
+	/* Send to the logbuffer */
 	logbuff_log (printbuffer);
 #else
 	/* Send to the stdout file */

post/tests.c

@@ -19,6 +19,10 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
+ *
+ * Be sure to mark tests to be run before relocation as such with the
+ * CFG_POST_PREREL flag so that logging is done correctly if the
+ * logbuffer support is enabled.
  */
 
 #include <common.h>
@@ -47,7 +51,8 @@ struct post_test post_list[] =
         "cache",
         "This test verifies the CPU cache operation.",
         POST_RAM | POST_ALWAYS,
-        &cache_post_test
+        &cache_post_test,
+	CFG_POST_CACHE
     },
 #endif
 #if CONFIG_POST & CFG_POST_WATCHDOG
@@ -56,7 +61,8 @@ struct post_test post_list[] =
         "watchdog",
         "This test checks the watchdog timer.",
         POST_RAM | POST_POWERON | POST_POWERFAIL | POST_MANUAL | POST_REBOOT,
-        &watchdog_post_test
+        &watchdog_post_test,
+	CFG_POST_WATCHDOG
     },
 #endif
 #if CONFIG_POST & CFG_POST_I2C
@@ -65,7 +71,8 @@ struct post_test post_list[] =
         "i2c",
         "This test verifies the I2C operation.",
         POST_RAM | POST_ALWAYS,
-        &i2c_post_test
+        &i2c_post_test,
+	CFG_POST_I2C
     },
 #endif
 #if CONFIG_POST & CFG_POST_RTC
@@ -74,7 +81,8 @@ struct post_test post_list[] =
         "rtc",
         "This test verifies the RTC operation.",
         POST_RAM | POST_POWERFAIL | POST_MANUAL,
-        &rtc_post_test
+        &rtc_post_test,
+	CFG_POST_RTC
     },
 #endif
 #if CONFIG_POST & CFG_POST_MEMORY
@@ -82,8 +90,9 @@ struct post_test post_list[] =
         "Memory test",
         "memory",
         "This test checks RAM.",
-        POST_ROM | POST_POWERON | POST_POWERFAIL,
-        &memory_post_test
+        POST_ROM | POST_POWERON | POST_POWERFAIL | POST_PREREL,
+        &memory_post_test,
+	CFG_POST_MEMORY
     },
 #endif
 #if CONFIG_POST & CFG_POST_CPU
@@ -93,7 +102,8 @@ struct post_test post_list[] =
         "This test verifies the arithmetic logic unit of"
         " CPU.",
         POST_RAM | POST_ALWAYS,
-        &cpu_post_test
+        &cpu_post_test,
+	CFG_POST_CPU
     },
 #endif
 #if CONFIG_POST & CFG_POST_UART
@@ -102,7 +112,8 @@ struct post_test post_list[] =
         "uart",
         "This test verifies the UART operation.",
         POST_RAM | POST_POWERFAIL | POST_MANUAL,
-        &uart_post_test
+        &uart_post_test,
+	CFG_POST_UART
     },
 #endif
 #if CONFIG_POST & CFG_POST_ETHER
@@ -111,7 +122,8 @@ struct post_test post_list[] =
         "ethernet",
         "This test verifies the ETHERNET operation.",
         POST_RAM | POST_ALWAYS | POST_MANUAL,
-        &ether_post_test
+        &ether_post_test,
+	CFG_POST_ETHER
     },
 #endif
 #if CONFIG_POST & CFG_POST_SPI
@@ -120,7 +132,8 @@ struct post_test post_list[] =
         "spi",
         "This test verifies the SPI operation.",
         POST_RAM | POST_ALWAYS | POST_MANUAL,
-        &spi_post_test
+        &spi_post_test,
+	CFG_POST_SPI
     },
 #endif
 #if CONFIG_POST & CFG_POST_USB
@@ -129,7 +142,8 @@ struct post_test post_list[] =
         "usb",
         "This test verifies the USB operation.",
         POST_RAM | POST_ALWAYS | POST_MANUAL,
-        &usb_post_test
+        &usb_post_test,
+	CFG_POST_USB
     },
 #endif
 #if CONFIG_POST & CFG_POST_SPR
@@ -137,8 +151,9 @@ struct post_test post_list[] =
         "SPR test",
         "spr",
         "This test checks SPR contents.",
-        POST_ROM | POST_ALWAYS,
-        &spr_post_test
+        POST_ROM | POST_ALWAYS | POST_PREREL,
+        &spr_post_test,
+	CFG_POST_SPR
     },
 #endif
 };