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arch-arm: Add support for automatic reset addr selection

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Add an option to automatically set the aarch64 reset vector to the
entry point of the kernel. This is useful when running bare metal
workloads that don't use a normal boot loader.

Change-Id: Id472f865d461f0d8d8ea8efe5db582c170de0b90
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8143
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
This commit is contained in:
Andreas Sandberg
2018-02-09 18:26:44 +00:00
parent 9c97d3fe69
commit dec0025dea
2 changed files with 7 additions and 3 deletions
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4
src/arch/arm/ArmSystem.py
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@@ -1,4 +1,4 @@
# Copyright (c) 2009, 2012-2013, 2015-2017 ARM Limited
# Copyright (c) 2009, 2012-2013, 2015-2018 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
@@ -72,6 +72,8 @@ class ArmSystem(System):
reset_addr_64 = Param.Addr(0x0,
"Reset address if the highest implemented exception level is 64 bits "
"(ARMv8)")
auto_reset_addr_64 = Param.Bool(False,
"Determine reset address from kernel entry point if no boot loader")
phys_addr_range_64 = Param.UInt8(40,
"Supported physical address range in bits when using AArch64 (ARMv8)")
have_large_asid_64 = Param.Bool(False,

6
src/arch/arm/system.cc
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2010, 2012-2013, 2015,2017 ARM Limited
* Copyright (c) 2010, 2012-2013, 2015,2017-2018 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
@@ -62,7 +62,9 @@ ArmSystem::ArmSystem(Params *p)
_haveVirtualization(p->have_virtualization),
_genericTimer(nullptr),
_highestELIs64(p->highest_el_is_64),
_resetAddr64(p->reset_addr_64),
_resetAddr64(p->auto_reset_addr_64 ?
(kernelEntry & loadAddrMask) + loadAddrOffset :
p->reset_addr_64),
_physAddrRange64(p->phys_addr_range_64),
_haveLargeAsid64(p->have_large_asid_64),
_m5opRange(p->m5ops_base ?