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arch: arm64: Deprecate booting from EL2

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We are deprecating booting and running in EL2.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
This commit is contained in:
Carlo Caione 2020-09-07 12:31:37 +02:00 • committed by Anas Nashif
commit 871bdd0712
1 changed files with 2 additions and 20 deletions
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22
arch/arm/core/aarch64/reset.S
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@ -120,26 +120,8 @@ SECTION_SUBSEC_FUNC(TEXT,_reset_section,__start)
eret
2:
/* Initialize VBAR */
msr vbar_el2, x19
/* SError, IRQ and FIQ routing enablement in EL2 */
mrs x0, hcr_el2
orr x0, x0, #(HCR_EL2_FMO | HCR_EL2_IMO | HCR_EL2_AMO)
msr hcr_el2, x0
/* Disable access trapping in EL2 for NEON/FP */
msr cptr_el2, xzr
/*
* Enable the instruction cache, stack pointer and data access
* alignment checks.
*/
mov x1, #(SCTLR_I_BIT | SCTLR_A_BIT | SCTLR_SA_BIT)
mrs x0, sctlr_el2
orr x0, x0, x1
msr sctlr_el2, x0
b 0f
/* Booting from EL2 is not supported */
b .
1:
/* Initialize VBAR */