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CBMEM console: Fix and enhance pre-RAM support

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Use the value of CONSOLE_PRERAM_BUFFER_SIZE to determine if we can
do CBMEM console in bootblock and romstage. Kconfig forces it to zero
if _BASE is unset or we cannot do CAR migration on x86.

Add CBMEM console to bootblock, except for x86. Only one of bootblock
and romstage clears the pre-RAM buffer.

To start with empty console log on S3 wakeup, ramstage now clears
previous contents of CBMEM buffer if there was no pre-RAM buffer.

Unify Kconfig variable naming.

TODO: ARM configurations do not define PRERAM_BUFFER_BASE values.

Change-Id: I70d82da629529dbfd7bc9491223abd703cbc0115
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7862
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
This commit is contained in:
Kyösti Mälkki
2014-12-21 08:55:47 +02:00
parent 4d10750d13
commit 8659e4072e
10 changed files with 66 additions and 48 deletions
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2
src/arch/riscv/romstage.ld
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@@ -76,7 +76,7 @@ SECTIONS
_end = .;
/*preram_cbmem_console = CONFIG_CBMEM_CONSOLE_PRERAM_BASE;*/
/*preram_cbmem_console = CONFIG_CONSOLE_PRERAM_BUFFER_BASE;*/
/* Discard the sections we don't need/want */
/DISCARD/ : {