Date: Tue, 1 Mar 2016 08:15:01 +0000 (UTC) From: Wojciech Macek <wma@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r296256 - in head/sys/arm64: arm64 include Message-ID: <201603010815.u218F1fX092334@repo.freebsd.org>
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Author: wma Date: Tue Mar 1 08:15:00 2016 New Revision: 296256 URL: https://svnweb.freebsd.org/changeset/base/296256 Log: Enable SRE_EL2 on ARM64 Enable system register access for EL2. Alpine-V2 is the first device requiring this to be enabled. It is also in-sync with Linux initialization code, and compatible with Alpine-V2 uboot requirements. Obtained from: Semihalf Submitted by: Michal Stanek <mst@semihalf.com> Sponsored by: Annapurna Labs Approved by: cognet (mentor) Reviewed by: wma Differential revision: https://reviews.freebsd.org/D5394 Modified: head/sys/arm64/arm64/locore.S head/sys/arm64/include/armreg.h Modified: head/sys/arm64/arm64/locore.S ============================================================================== --- head/sys/arm64/arm64/locore.S Tue Mar 1 07:06:36 2016 (r296255) +++ head/sys/arm64/arm64/locore.S Tue Mar 1 08:15:00 2016 (r296256) @@ -265,6 +265,7 @@ drop_to_el1: mrs x2, icc_sre_el2 orr x2, x2, #ICC_SRE_EL2_EN /* Enable access from insecure EL1 */ + orr x2, x2, #ICC_SRE_EL2_SRE /* Enable system registers */ msr icc_sre_el2, x2 2: Modified: head/sys/arm64/include/armreg.h ============================================================================== --- head/sys/arm64/include/armreg.h Tue Mar 1 07:06:36 2016 (r296255) +++ head/sys/arm64/include/armreg.h Tue Mar 1 08:15:00 2016 (r296256) @@ -131,6 +131,7 @@ #define ICC_SRE_EL1_SRE (1U << 0) /* ICC_SRE_EL2 */ +#define ICC_SRE_EL2_SRE (1U << 0) #define ICC_SRE_EL2_EN (1U << 3) /* ID_AA64DFR0_EL1 */
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