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-rw-r--r--cpu/blackfin/Makefile2
-rw-r--r--cpu/blackfin/os_log.c30
-rw-r--r--include/asm-blackfin/blackfin_local.h3
-rw-r--r--lib_blackfin/board.c6
4 files changed, 40 insertions, 1 deletions
diff --git a/cpu/blackfin/Makefile b/cpu/blackfin/Makefile
index 1378fd1..f684106 100644
--- a/cpu/blackfin/Makefile
+++ b/cpu/blackfin/Makefile
@@ -17,7 +17,7 @@ EXTRA :=
CEXTRA := initcode.o
SEXTRA := start.o
SOBJS := interrupt.o cache.o
-COBJS-y := cpu.o traps.o interrupts.o reset.o serial.o watchdog.o
+COBJS-y := cpu.o traps.o interrupts.o os_log.o reset.o serial.o watchdog.o
COBJS-$(CONFIG_JTAG_CONSOLE) += jtag-console.o
ifeq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)
diff --git a/cpu/blackfin/os_log.c b/cpu/blackfin/os_log.c
new file mode 100644
index 0000000..e1c8e29
--- /dev/null
+++ b/cpu/blackfin/os_log.c
@@ -0,0 +1,30 @@
+/*
+ * functions for handling OS log buffer
+ *
+ * Copyright (c) 2009 Analog Devices Inc.
+ *
+ * Licensed under the 2-clause BSD.
+ */
+
+#include <common.h>
+
+#define OS_LOG_MAGIC 0xDEADBEEF
+#define OS_LOG_MAGIC_ADDR ((unsigned long *)0x4f0)
+#define OS_LOG_PTR_ADDR ((char **)0x4f4)
+
+bool bfin_os_log_check(void)
+{
+ if (*OS_LOG_MAGIC_ADDR != OS_LOG_MAGIC)
+ return false;
+ *OS_LOG_MAGIC_ADDR = 0;
+ return true;
+}
+
+void bfin_os_log_dump(void)
+{
+ char *log = *OS_LOG_PTR_ADDR;
+ while (*log) {
+ puts(log);
+ log += strlen(log) + 1;
+ }
+}
diff --git a/include/asm-blackfin/blackfin_local.h b/include/asm-blackfin/blackfin_local.h
index e17d8a2..8ec7928 100644
--- a/include/asm-blackfin/blackfin_local.h
+++ b/include/asm-blackfin/blackfin_local.h
@@ -61,6 +61,9 @@ extern u_long get_sclk(void);
# define bfin_revid() (*pCHIPID >> 28)
+extern bool bfin_os_log_check(void);
+extern void bfin_os_log_dump(void);
+
extern void blackfin_icache_flush_range(const void *, const void *);
extern void blackfin_dcache_flush_range(const void *, const void *);
extern void blackfin_icache_dcache_flush_range(const void *, const void *);
diff --git a/lib_blackfin/board.c b/lib_blackfin/board.c
index 28de372..b957a9d 100644
--- a/lib_blackfin/board.c
+++ b/lib_blackfin/board.c
@@ -384,6 +384,12 @@ void board_init_r(gd_t * id, ulong dest_addr)
post_run(NULL, POST_RAM | post_bootmode_get(0));
#endif
+ if (bfin_os_log_check()) {
+ puts("\nLog buffer from operating system:\n");
+ bfin_os_log_dump();
+ puts("\n");
+ }
+
/* main_loop() can return to retry autoboot, if so just run it again. */
for (;;)
main_loop();