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The FEAT_MTPMU feature disable runs very early after reset. This means,
it needs to be written in assembly, since the C runtime has not been
initialised yet.
However, there is no need for it to be initialised so soon. The PMU
state is only relevant after TF-A has relinquished control. The code
to do this is also very verbose and difficult to read. Delaying the
initialisation allows for it to happen with the rest of the PMU. Align
with FEAT_STATE in the process.
BREAKING CHANGE: This patch explicitly breaks the EL2 entry path. It is
currently unsupported.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: I2aa659d026fbdb75152469f6d19812ece3488c6f
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BL2_AT_EL3 is an overloaded macro which has two uses:
1. When BL2 is entry point into TF-A(no BL1)
2. When BL2 is running at EL3 exception level
These two scenarios are not exactly same even though first implicitly
means second to be true. To distinguish between these two use cases we
introduce new macros.
BL2_AT_EL3 is renamed to RESET_TO_BL2 to better convey both 1. and 2.
Additional macro BL2_RUNS_AT_EL3 is added to cover all scenarious where
BL2 runs at EL3 (including four world systems).
BREAKING CHANGE: BL2_AT_EL3 renamed to RESET_TO_BL2 across the
repository.
Change-Id: I477e1d0f843b44b799c216670e028fcb3509fb72
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
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Add new options SEPARATE_BL2_NOLOAD_REGION to separate no-loadable
sections (.bss, stack, page tables) to a ram region specified
by BL2_NOLOAD_START and BL2_NOLOAD_LIMIT.
Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: I844ee0fc405474af0aff978d292c826fbe0a82fd
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Currently on image entry, the data cache in the RW address range is
invalidated before MMU is enabled to safeguard against potential
stale data from previous firmware stage. If PIE is enabled however,
RO sections including the GOT may be also modified during pie fixup.
Therefore, to be on the safe side, invalidate the entire image
region if PIE is enabled.
Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: I7ee2a324fe4377b026e32f9ab842617ad4e09d89
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Trap bits of trace filter control registers access are in
architecturally UNKNOWN state at boot hence
1. Initialized trap bits to one to prohibit trace filter control
registers accesses in lower ELs (EL2, EL1) in all security states
when FEAT_TRF is implemented.
2. These bits are RES0 when FEAT_TRF is not implemented and hence set
it to zero to aligns with the Arm ARM reference recommendation,
that mentions software must writes RES0 bits with all 0s.
Change-Id: I1b7abf2170ece84ee585c91cda32d22b25c0fc34
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
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Trap bits of trace system registers access are in architecturally
UNKNOWN state at boot hence
1. Initialized trap bits to one to prohibit trace system registers
accesses in lower ELs (EL2, EL1) in all security states when system
trace registers are implemented.
2. These bits are RES0 in the absence of system trace register support
and hence set it to zero to aligns with the Arm ARM reference
recommendation,that mentions software must writes RES0 bits with
all 0s.
Change-Id: I4b6c15cda882325273492895d72568b29de89ca3
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
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Only BL32 (SP_min) is supported at the moment, BL1 and BL2_AT_EL3 are just
stubbed with _pie_fixup_size=0.
The changes are an adaptation for AARCH32 on what has been done for
PIE support on AARCH64.
The RELA_SECTION is redefined for AARCH32, as the created section is
.rel.dyn and the symbols are .rel*.
Change-Id: I92bafe70e6b77735f6f890f32f2b637b98cf01b9
Signed-off-by: Yann Gautier <yann.gautier@st.com>
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The use of end addresses is preferred over the size of sections.
This was done for some AARCH64 files for PIE with commit [1],
and some extra explanations can be found in its commit message.
Align the missing AARCH64 files.
For AARCH32 files, this is required to prepare PIE support introduction.
[1] f1722b693d36 ("PIE: Use PC relative adrp/adr for symbol reference")
Change-Id: I8f1c06580182b10c680310850f72904e58a54d7d
Signed-off-by: Yann Gautier <yann.gautier@st.com>
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If FEAT_PMUv3 is implemented and PMEVTYPER<n>(_EL0).MT bit is implemented
as well, it is possible to control whether PMU counters take into account
events happening on other threads.
If FEAT_MTPMU is implemented, EL3 (or EL2) can override the MT bit
leaving it to effective state of 0 regardless of any write to it.
This patch introduces the DISABLE_MTPMU flag, which allows to diable
multithread event count from EL3 (or EL2). The flag is disabled
by default so the behavior is consistent with those architectures
that do not implement FEAT_MTPMU.
Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: Iee3a8470ae8ba13316af1bd40c8d4aa86e0cb85e
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At each BL entry point, the registers r9 to r12 are used to save info from
the previous BL parameters put in r0 to r3. But zeromem uses r12, leading
to a corruption of arg3. Therefore this change copies r12 to r7 before
zeromem() call and restores r12 afterwards. It may be better to save it
in r7 in el3_arch_init_common and not at the entrypoint as r7 could be used
in other functions, especially platform ones.
This is a fix for Task T661.
Change-Id: Icc11990c69b5d4c542d08aca1a77b1f754b61a53
Signed-off-by: Yann Gautier <yann.gautier@st.com>
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Add the missing flag for aarch32 XIP memory mode. It was
previously added in aarch64 only.
Minor: Correct the aarch64 missing flag.
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Change-Id: Iac0a7581a1fd580aececa75f97deb894858f776f
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This patch changes implementation for disabling Secure Cycle
Counter. For ARMv8.5 the counter gets disabled by setting
SDCR.SCCD bit on CPU cold/warm boot. For the earlier
architectures PMCR register is saved/restored on secure
world entry/exit from/to Non-secure state, and cycle counting
gets disabled by setting PMCR.DP bit.
In 'include\aarch32\arch.h' header file new
ARMv8.5-PMU related definitions were added.
Change-Id: Ia8845db2ebe8de940d66dff479225a5b879316f8
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
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ARMv7 and Cortex-A32(ARMv8/aarch32) uses "arm-linux-gnueabi" toolchain which
has both soft-float and hard-float variants and so there could be scenarios
where soft-float toolchain is used.Even though TF-A documentation recommends
to use hard-float toolchain for aarch32 but there are external projects where
we cannot mandate the selection of toolchain and for those projects at least
the build should not fail.
Current TF-A source fails to build with soft-float toolchain because assembler
does not recognizes "vmsr" instruction which is required to enable floating
point unit.
To avoid this piece of code being compiled with soft-float toolchain add
predefined macro guard " __SOFTFP__" exposed by soft-float toolchain.
Change-Id: I76ba40906a8d622dcd476dd36ab4d277a925996c
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
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Disable processor Cycle Counting in Secure state
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Cortex A5 doesnt support VFP, Large Page addressing and generic timer
which are addressed in this patch. The device tree for Cortex a5
is also included.
Change-Id: I0722345721b145dfcc80bebd36a1afbdc44bb678
Signed-off-by: Usama Arif <usama.arif@arm.com>
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In a system with ARMv8.5-PMU implemented:
- If EL3 is using AArch32, setting MDCR_EL3.SCCD to 1 disables counting
in Secure state in PMCCNTR.
- If EL3 is using AArch64, setting SDCR.SCCD to 1 disables counting in
Secure state in PMCCNTR_EL0.
So far this effect has been achieved by setting PMCR_EL0.DP (in AArch64)
or PMCR.DP (in AArch32) to 1 instead, but this isn't considered secure
as any EL can change that value.
Change-Id: I82cbb3e48f2e5a55c44d9c4445683c5881ef1f6f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
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The architecture dependant header files in include/lib/${ARCH} and
include/common/${ARCH} have been moved to /include/arch/${ARCH}.
Change-Id: I96f30fdb80b191a51448ddf11b1d4a0624c03394
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
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