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| author | Aaron Durbin <adurbin@chromium.org> | 2015-07-03 17:04:21 -0500 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-07-07 20:07:27 +0200 |
| commit | 1936f6cf25bee5a0eb313d6734df7af871757e7c (patch) | |
| tree | 41bfb289d9ee27700bbbeaf46dca5ab899708576 /src/include | |
| parent | d17a8623a54f40c3a8e0aab35859d8e18e73e4a0 (diff) | |
| download | coreboot-1936f6cf25bee5a0eb313d6734df7af871757e7c.tar.xz | |
timestamp: add generic cache region
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)
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/memlayout.h | 3 | ||||
| -rw-r--r-- | src/include/symbols.h | 4 | ||||
| -rw-r--r-- | src/include/timestamp.h | 13 |
3 files changed, 20 insertions, 0 deletions
diff --git a/src/include/memlayout.h b/src/include/memlayout.h index 2771f2fe14..a5296286b2 100644 --- a/src/include/memlayout.h +++ b/src/include/memlayout.h @@ -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) diff --git a/src/include/symbols.h b/src/include/symbols.h index 9102e82952..3fbf819902 100644 --- a/src/include/symbols.h +++ b/src/include/symbols.h @@ -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 \ diff --git a/src/include/timestamp.h b/src/include/timestamp.h index a248ea45cd..54d69ce132 100644 --- a/src/include/timestamp.h +++ b/src/include/timestamp.h @@ -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) |