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authorYatharth Kochar <yatharth.kochar@arm.com>2016-03-11 14:20:19 +0000
committerSoby Mathew <soby.mathew@arm.com>2016-06-16 08:31:42 +0100
commita31d8983f42153b0448103bdd47e1f4c9c093765 (patch)
tree2a2a051ce2179e8dcaf5efe3192bf0981e457c36 /lib/pmf/pmf_smc.c
parentf9455cea8c38f36f12c524226ccfae2ed2dabf87 (diff)
downloadtrusted-firmware-a-a31d8983f42153b0448103bdd47e1f4c9c093765.tar.gz
Add Performance Measurement Framework(PMF)
This patch adds Performance Measurement Framework(PMF) in the ARM Trusted Firmware. PMF is implemented as a library and the SMC interface is provided through ARM SiP service. The PMF provides capturing, storing, dumping and retrieving the time-stamps, by enabling the development of services by different providers, that can be easily integrated into ARM Trusted Firmware. The PMF capture and retrieval APIs can also do appropriate cache maintenance operations to the timestamp memory when the caller indicates so. `pmf_main.c` consists of core functions that implement service registration, initialization, storing, dumping and retrieving the time-stamp. `pmf_smc.c` consists SMC handling for registered PMF services. `pmf.h` consists of the macros that can be used by the PMF service providers to register service and declare time-stamp functions. `pmf_helpers.h` consists of internal macros that are used by `pmf.h` By default this feature is disabled in the ARM trusted firmware. To enable it set the boolean flag `ENABLE_PMF` to 1. NOTE: The caller is responsible for specifying the appropriate cache maintenance flags and for acquiring/releasing appropriate locks before/after capturing/retrieving the time-stamps. Change-Id: Ib45219ac07c2a81b9726ef6bd9c190cc55e81854
Diffstat (limited to 'lib/pmf/pmf_smc.c')
-rw-r--r--lib/pmf/pmf_smc.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/lib/pmf/pmf_smc.c b/lib/pmf/pmf_smc.c
new file mode 100644
index 0000000000..14190b774d
--- /dev/null
+++ b/lib/pmf/pmf_smc.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <assert.h>
+#include <debug.h>
+#include <platform.h>
+#include <pmf.h>
+#include <smcc_helpers.h>
+
+/*
+ * This function is responsible for handling all PMF SMC calls.
+ */
+uintptr_t pmf_smc_handler(unsigned int smc_fid,
+ u_register_t x1,
+ u_register_t x2,
+ u_register_t x3,
+ u_register_t x4,
+ void *cookie,
+ void *handle,
+ u_register_t flags)
+{
+ int rc;
+ unsigned long long ts_value;
+
+ if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) {
+
+ x1 = (uint32_t)x1;
+ x2 = (uint32_t)x2;
+ x3 = (uint32_t)x3;
+
+ switch (smc_fid) {
+ case PMF_SMC_GET_TIMESTAMP_32:
+ /*
+ * Return error code and the captured
+ * time-stamp to the caller.
+ * x0 --> error code.
+ * x1 - x2 --> time-stamp value.
+ */
+ rc = pmf_get_timestamp_smc(x1, x2, x3, &ts_value);
+ SMC_RET3(handle, rc, (uint32_t)ts_value,
+ (uint32_t)(ts_value >> 32));
+
+ default:
+ break;
+ }
+ } else {
+ switch (smc_fid) {
+ case PMF_SMC_GET_TIMESTAMP_64:
+ /*
+ * Return error code and the captured
+ * time-stamp to the caller.
+ * x0 --> error code.
+ * x1 --> time-stamp value.
+ */
+ rc = pmf_get_timestamp_smc(x1, x2, x3, &ts_value);
+ SMC_RET2(handle, rc, ts_value);
+
+ default:
+ break;
+ }
+ }
+
+ WARN("Unimplemented PMF Call: 0x%x \n", smc_fid);
+ SMC_RET1(handle, SMC_UNK);
+}