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Asynchronous abort exceptions generated by the platform during cold boot are not taken in EL3 unless SCR_EL3.EA is set. Therefore EA bit is set along with RES1 bits in early BL1 and BL31 architecture initialisation. Further write accesses to SCR_EL3 preserve these bits during cold boot. A build flag controls SCR_EL3.EA value to keep asynchronous abort exceptions being trapped by EL3 after cold boot or not. For further reference SError Interrupts are also known as asynchronous external aborts. On Cortex-A53 revisions below r0p2, asynchronous abort exceptions are taken in EL3 whatever the SCR_EL3.EA value is. Fixes arm-software/tf-issues#368 Signed-off-by: Gerald Lejeune <gerald.lejeune@st.com> |
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aarch64 | ||
tbbr | ||
bl1_context_mgmt.c | ||
bl1_fwu.c | ||
bl1_main.c | ||
bl1_private.h | ||
bl1.ld.S | ||
bl1.mk |