cbmem_console: Improve 'cbmem -1' behavior for truncated pre-CBMEM logs

The 'cbmem -1' flag that cuts off console output before the last boot
will ignore content from earlier stages if it was truncated due to lack
of pre-CBMEM console space. This patch makes the "log truncated" message
more specific and adds it as an additional cut-off marker to 'cbmem -1'
to counteract that problem.

Also raise the log level of the coreboot banner one step to BIOS_NOTICE
to make it more likely to be included in the output for 'cbmem -1' to
find. (I believe NOTICE is reasonable but I wouldn't want to go as far
as WARN which should be reserved for actual problems. Of course this is
not ideal, but then again, our whole log-level system really isn't... it
would be better if we could make it always print a banner to the CBMEM
console without affecting the UART at the same time, but that would
require a larger amount of work.)

Change-Id: I58288593dfa757e14f4a9da4ffa7e27b0b66feb9
Reported-by: https://ticket.coreboot.org/issues/117
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/19720
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/cbmem_console.c b/src/lib/cbmem_console.c
index eb0cc93ee4..b0008b1d9c 100644
--- a/src/lib/cbmem_console.c
+++ b/src/lib/cbmem_console.c
@@ -156,8 +156,8 @@ static void copy_console_buffer(struct cbmem_console *src_cons_p)
 		return;
 
 	if (src_cons_p->cursor & OVERFLOW) {
-		const char overflow_warning[] = "\n*** Pre-CBMEM console "
-			"overflowed, log truncated ***\n";
+		const char overflow_warning[] = "\n*** Pre-CBMEM " ENV_STRING
+			" console overflowed, log truncated! ***\n";
 		for (c = 0; c < sizeof(overflow_warning) - 1; c++)
 			cbmemc_tx_byte(overflow_warning[c]);
 		for (c = src_cons_p->cursor & CURSOR_MASK;