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timestamp: add generic cache region

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In order to accommodate tracking timestamps in all the
__PRE_RAM__ stages (bootblock, verstage, romstage, etc)
of a platform one needs to provide a way to specify
a persistent region of SRAM or cache-as-ram to store
the timestamps until cbmem comes online. Provide that
infrastructure.

Based on original patches from chromium.org:
Original-Change-Id: I4d78653c0595523eeeb02115423e7fecceea5e1e
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/223348
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>

Original-Change-Id: Ie5ffda3112d626068bd1904afcc5a09bc4916d16
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/224024
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>

Change-Id: I8779526136e89ae61a6f177ce5c74a6530469ae1
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/10790
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
This commit is contained in:
Aaron Durbin
2015-07-03 17:04:21 -05:00
committed by Patrick Georgi
parent d17a8623a5
commit 1936f6cf25
6 changed files with 221 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/include/memlayout.h
View File

@@ -47,6 +47,9 @@
#define DRAM_START(addr) SYMBOL(dram, addr)
#define TIMESTAMP(addr, size) \
REGION(timestamp, addr, size, 8)
#define PRERAM_CBMEM_CONSOLE(addr, size) \
REGION(preram_cbmem_console, addr, size, 4)

4
src/include/symbols.h
View File

@@ -28,6 +28,10 @@ extern u8 _esram[];
extern u8 _dram[];
extern u8 _timestamp[];
extern u8 _etimestamp[];
#define _timestamp_size (_etimestamp - _timestamp)
extern u8 _preram_cbmem_console[];
extern u8 _epreram_cbmem_console[];
#define _preram_cbmem_console_size \

13
src/include/timestamp.h
View File

@@ -89,8 +89,21 @@ enum timestamp_id {
};
#if CONFIG_COLLECT_TIMESTAMPS && (CONFIG_EARLY_CBMEM_INIT || !defined(__PRE_RAM__))
/*
* timestamp_init() needs to be called once for each of these cases:
* 1. __PRE_RAM__ (bootblock, romstage, verstage, etc) and
* 2. !__PRE_RAM__ (ramstage)
* The latter is taken care of by the generic coreboot infrastructure so
* it's up to the chipset/arch to call timestamp_init() in *one* of
* the __PRE_RAM__ stages. If multiple calls are made timestamps will be lost.
*/
void timestamp_init(uint64_t base);
/*
* Add a new timestamp. Depending on cbmem is available or not, this timestamp
* will be stored to cbmem / timestamp cache.
*/
void timestamp_add(enum timestamp_id id, uint64_t ts_time);
/* Calls timestamp_add with current timestamp. */
void timestamp_add_now(enum timestamp_id id);
#else
#define timestamp_init(base)