summaryrefslogtreecommitdiff
path: root/src/include
diff options
context:
space:
mode:
authorAaron Durbin <adurbin@chromium.org>2015-07-03 17:04:21 -0500
committerPatrick Georgi <pgeorgi@google.com>2015-07-07 20:07:27 +0200
commit1936f6cf25bee5a0eb313d6734df7af871757e7c (patch)
tree41bfb289d9ee27700bbbeaf46dca5ab899708576 /src/include
parentd17a8623a54f40c3a8e0aab35859d8e18e73e4a0 (diff)
downloadcoreboot-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.h3
-rw-r--r--src/include/symbols.h4
-rw-r--r--src/include/timestamp.h13
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)