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author | Julius Werner <jwerner@chromium.org> | 2018-10-10 15:31:36 -0700 |
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committer | Julius Werner <jwerner@chromium.org> | 2018-10-12 20:14:54 +0000 |
commit | ca52a258822c1c47d533684c5a4cbe5f2b7bd487 (patch) | |
tree | 4017c7a2e999f6a7e58f942a7a789352a6666660 /payloads/libpayload/arch/arm64/lib/clock.c | |
parent | e1b1ec7154e4c41adf4eb6a0e4ebd08a2e938a2c (diff) | |
download | coreboot-ca52a258822c1c47d533684c5a4cbe5f2b7bd487.tar.xz |
libpayload: arm64: Conform to new coreboot lib_helpers.h and assume EL2
This patch adds the new, faster architectural register accessors to
libpayload that were already added to coreboot in CB:27881. It also
hardcodes the assumption that coreboot payloads run at EL2, which has
already been hardcoded in coreboot with CB:27880 (see rationale there).
This means we can drop all the read_current/write_current stuff which
added a lot of unnecessary helpers to check the current exception level.
This patch breaks payloads that used read_current/write_current
accessors, but it seems unlikely that many payloads deal with this stuff
anyway, and it should be a trivial fix (just replace them with the
respective _el2 versions).
Also add accessors for a couple of more registers that are required to
enable debug mode while I'm here.
Change-Id: Ic9dfa48411f3805747613f03611f8a134a51cc46
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/29017
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Diffstat (limited to 'payloads/libpayload/arch/arm64/lib/clock.c')
-rw-r--r-- | payloads/libpayload/arch/arm64/lib/clock.c | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/payloads/libpayload/arch/arm64/lib/clock.c b/payloads/libpayload/arch/arm64/lib/clock.c deleted file mode 100644 index 9f06f0828c..0000000000 --- a/payloads/libpayload/arch/arm64/lib/clock.c +++ /dev/null @@ -1,40 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2014 Google Inc. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. 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. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. - * - * clock.c: Functions for accessing clock and timer related registers - * Reference: ARM Architecture Reference Manual, ARMv8-A edition - */ - -#include <stdint.h> - -#include <arch/lib_helpers.h> - -void set_cntfrq(uint32_t freq) -{ - __asm__ __volatile__("msr cntfrq_el0, %0" :: "r"(freq)); -} |