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authorFurquan Shaikh <furquan@google.com>2014-06-24 15:21:03 -0700
committerMarc Jones <marc.jones@se-eng.com>2015-03-02 22:19:46 +0100
commitd653ae89606459d3fccc507c923bdfce262c0f7b (patch)
tree1b2ffbab58a317b0e934a8b614efcbfa94a0b7f5 /src/arch/arm64
parent732b83ed3667d7c3066d2c16406ab6acdd8f32b9 (diff)
coreboot arm: Define function for setting cntfrq register
Define functions for setting cntfrq register in arm and arm64 arch. This allows SoCs to set this register independently of the architecture being used. BUG=None BRANCH=None TEST=Compiles successfully for nyan and rush Original-Change-Id: I93240419b2c012eee29a408deff34a42af943a63 Original-Signed-off-by: Furquan Shaikh <furquan@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/205580 Original-Tested-by: Furquan Shaikh <furquan@chromium.org> Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Original-Commit-Queue: Aaron Durbin <adurbin@chromium.org> (cherry picked from commit 768463fef5d630dec915aa0b95e7724d4a6f74b6) armv8: GPL license armv8 lib BUG=None BRANCH=None TEST=Compiles successfully. Original-Change-Id: Ibe0f09ef6704ad808cc482ffec27a4db32d7f6fd Original-Signed-off-by: Furquan Shaikh <furquan@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/250950 Original-Trybot-Ready: Furquan Shaikh <furquan@chromium.org> Original-Tested-by: Furquan Shaikh <furquan@chromium.org> Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org> (cherry picked from commit bc115869bb0bcedbc284677ca5743b9ab40bfc7e) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: I298c3e76cb52f0876bce3dd4f54d875f62e9310a Reviewed-on: http://review.coreboot.org/8468 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Aaron Durbin <adurbin@google.com>
Diffstat (limited to 'src/arch/arm64')
-rw-r--r--src/arch/arm64/armv8/lib/Makefile.inc2
-rw-r--r--src/arch/arm64/armv8/lib/clock.c32
-rw-r--r--src/arch/arm64/include/arch/clock.h25
3 files changed, 58 insertions, 1 deletions
diff --git a/src/arch/arm64/armv8/lib/Makefile.inc b/src/arch/arm64/armv8/lib/Makefile.inc
index bda203b0d5..3e393bbe23 100644
--- a/src/arch/arm64/armv8/lib/Makefile.inc
+++ b/src/arch/arm64/armv8/lib/Makefile.inc
@@ -20,7 +20,7 @@
##
################################################################################
-lib_access = pstate.c sysctrl.c cache.c tlb.c misc.c
+lib_access = pstate.c sysctrl.c cache.c tlb.c misc.c clock.c
ifeq ($(CONFIG_ARCH_BOOTBLOCK_ARMV8_64),y)
bootblock-y += $(lib_access)
diff --git a/src/arch/arm64/armv8/lib/clock.c b/src/arch/arm64/armv8/lib/clock.c
new file mode 100644
index 0000000000..00c9208e5e
--- /dev/null
+++ b/src/arch/arm64/armv8/lib/clock.c
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google Inc
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ *
+ * clock.c: Functions for accessing clock and timer related registers
+ * Reference: ARM Architecture Reference Manual, ARMv8-A edition
+ */
+
+#include <stdint.h>
+
+#include <arch/clock.h>
+
+void set_cntfrq(uint32_t freq)
+{
+ __asm__ __volatile__("msr cntfrq_el0, %0" :: "r"(freq));
+}
diff --git a/src/arch/arm64/include/arch/clock.h b/src/arch/arm64/include/arch/clock.h
new file mode 100644
index 0000000000..a11fbd4999
--- /dev/null
+++ b/src/arch/arm64/include/arch/clock.h
@@ -0,0 +1,25 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __ARM_CLOCK_H_
+#define __ARM_CLOCK_H_
+
+void set_cntfrq(uint32_t);
+
+#endif //__ARM_CLOCK_H_