AMU: Add configuration helpers for aarch64

Add some AMU helper functions to allow configuring, reading and
writing of the Group 0 and Group 1 counters.  Documentation for these
helpers will come in a separate patch.

Change-Id: I656e070d2dae830c22414f694aa655341d4e2c40
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>

4 files changed, 72 insertions, 0 deletions

diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h
index 96e2d5fe..1d86205e 100644
--- a/include/lib/aarch64/arch.h
+++ b/include/lib/aarch64/arch.h
@@ -656,4 +656,45 @@
 #define AMEVTYPER02_EL0		S3_3_C13_C6_2
 #define AMEVTYPER03_EL0		S3_3_C13_C6_3
 
+/* Activity Monitor Group 1 Event Counter Registers */
+#define AMEVCNTR10_EL0		S3_3_C13_C12_0
+#define AMEVCNTR11_EL0		S3_3_C13_C12_1
+#define AMEVCNTR12_EL0		S3_3_C13_C12_2
+#define AMEVCNTR13_EL0		S3_3_C13_C12_3
+#define AMEVCNTR14_EL0		S3_3_C13_C12_4
+#define AMEVCNTR15_EL0		S3_3_C13_C12_5
+#define AMEVCNTR16_EL0		S3_3_C13_C12_6
+#define AMEVCNTR17_EL0		S3_3_C13_C12_7
+#define AMEVCNTR18_EL0		S3_3_C13_C13_0
+#define AMEVCNTR19_EL0		S3_3_C13_C13_1
+#define AMEVCNTR1A_EL0		S3_3_C13_C13_2
+#define AMEVCNTR1B_EL0		S3_3_C13_C13_3
+#define AMEVCNTR1C_EL0		S3_3_C13_C13_4
+#define AMEVCNTR1D_EL0		S3_3_C13_C13_5
+#define AMEVCNTR1E_EL0		S3_3_C13_C13_6
+#define AMEVCNTR1F_EL0		S3_3_C13_C13_7
+
+/* Activity Monitor Group 1 Event Type Registers */
+#define AMEVTYPER10_EL0		S3_3_C13_C14_0
+#define AMEVTYPER11_EL0		S3_3_C13_C14_1
+#define AMEVTYPER12_EL0		S3_3_C13_C14_2
+#define AMEVTYPER13_EL0		S3_3_C13_C14_3
+#define AMEVTYPER14_EL0		S3_3_C13_C14_4
+#define AMEVTYPER15_EL0		S3_3_C13_C14_5
+#define AMEVTYPER16_EL0		S3_3_C13_C14_6
+#define AMEVTYPER17_EL0		S3_3_C13_C14_7
+#define AMEVTYPER18_EL0		S3_3_C13_C15_0
+#define AMEVTYPER19_EL0		S3_3_C13_C15_1
+#define AMEVTYPER1A_EL0		S3_3_C13_C15_2
+#define AMEVTYPER1B_EL0		S3_3_C13_C15_3
+#define AMEVTYPER1C_EL0		S3_3_C13_C15_4
+#define AMEVTYPER1D_EL0		S3_3_C13_C15_5
+#define AMEVTYPER1E_EL0		S3_3_C13_C15_6
+#define AMEVTYPER1F_EL0		S3_3_C13_C15_7
+
+/* AMCGCR_EL0 definitions */
+#define AMCGCR_EL0_CG1NC_SHIFT	U(8)
+#define AMCGCR_EL0_CG1NC_LENGTH	U(8)
+#define AMCGCR_EL0_CG1NC_MASK	U(0xff)
+
 #endif /* __ARCH_H__ */
diff --git a/include/lib/aarch64/arch_helpers.h b/include/lib/aarch64/arch_helpers.h
index 831dfb06..485ed432 100644
--- a/include/lib/aarch64/arch_helpers.h
+++ b/include/lib/aarch64/arch_helpers.h
@@ -322,6 +322,7 @@ DEFINE_RENAME_SYSREG_WRITE_FUNC(icc_eoir0_el1, ICC_EOIR0_EL1)
 DEFINE_RENAME_SYSREG_WRITE_FUNC(icc_eoir1_el1, ICC_EOIR1_EL1)
 DEFINE_RENAME_SYSREG_WRITE_FUNC(icc_sgi0r_el1, ICC_SGI0R_EL1)
 
+DEFINE_RENAME_SYSREG_RW_FUNCS(amcgcr_el0, AMCGCR_EL0)
 DEFINE_RENAME_SYSREG_RW_FUNCS(amcntenclr0_el0, AMCNTENCLR0_EL0)
 DEFINE_RENAME_SYSREG_RW_FUNCS(amcntenset0_el0, AMCNTENSET0_EL0)
 DEFINE_RENAME_SYSREG_RW_FUNCS(amcntenclr1_el0, AMCNTENCLR1_EL0)
diff --git a/include/lib/extensions/amu.h b/include/lib/extensions/amu.h
index 2ecbea56..faa0ee12 100644
--- a/include/lib/extensions/amu.h
+++ b/include/lib/extensions/amu.h
@@ -10,6 +10,7 @@
 #include <sys/cdefs.h> /* for CASSERT() */
 #include <cassert.h>
 #include <platform_def.h>
+#include <stdint.h>
 
 /* All group 0 counters */
 #define AMU_GROUP0_COUNTERS_MASK	0xf
@@ -29,6 +30,16 @@
 CASSERT(AMU_GROUP1_COUNTERS_MASK <= 0xffff, invalid_amu_group1_counters_mask);
 CASSERT(AMU_GROUP1_NR_COUNTERS <= 16, invalid_amu_group1_nr_counters);
 
+int amu_supported(void);
 void amu_enable(int el2_unused);
 
+/* Group 0 configuration helpers */
+uint64_t amu_group0_cnt_read(int idx);
+void amu_group0_cnt_write(int idx, uint64_t val);
+
+/* Group 1 configuration helpers */
+uint64_t amu_group1_cnt_read(int idx);
+void amu_group1_cnt_write(int idx, uint64_t val);
+void amu_group1_set_evtype(int idx, unsigned int val);
+
 #endif /* __AMU_H__ */
diff --git a/include/lib/extensions/amu_private.h b/include/lib/extensions/amu_private.h
new file mode 100644
index 00000000..0c660bb8
--- /dev/null
+++ b/include/lib/extensions/amu_private.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __AMU_PRIVATE_H__
+#define __AMU_PRIVATE_H__
+
+#include <stdint.h>
+
+uint64_t amu_group0_cnt_read_internal(int idx);
+void amu_group0_cnt_write_internal(int idx, uint64_t);
+
+uint64_t amu_group1_cnt_read_internal(int idx);
+void amu_group1_cnt_write_internal(int idx, uint64_t);
+void amu_group1_set_evtype_internal(int idx, unsigned int val);
+
+#endif /* __AMU_PRIVATE_H__ */