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[174.52.16.57]) by smtp.gmail.com with ESMTPSA id 12sm11809361qkg.39.2021.01.31.15.25.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 31 Jan 2021 15:25:26 -0800 (PST) From: "Rebecca Cran" To: devel@edk2.groups.io Cc: Rebecca Cran , leif@nuviainc.com, Ard Biesheuvel , nd@arm.com, Sami Mujawar , Liming Gao , Michael D Kinney , Zhiguang Liu , Samer El-Haj-Mahmoud , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Sami Mujawar Subject: [edk2-devel] [PATCH v7 05/21] ArmPkg: Add helper function to read the Memory Model Feature Register 4 Date: Sun, 31 Jan 2021 16:24:55 -0700 Message-Id: <20210131232511.18340-6-rebecca@nuviainc.com> In-Reply-To: <20210131232511.18340-1-rebecca@nuviainc.com> References: <20210131232511.18340-1-rebecca@nuviainc.com> MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,rebecca@nuviainc.com Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1612135531; bh=fa4l8vlAL1+DD/rH3YPoChGyg/URXdXWEu6xk9UsAgg=; h=Cc:Date:From:Reply-To:Subject:To; b=tqVctpYNtMgc/gDtFsUR6tWtszz+g8kPeLBR50rSz4w/vIAcWVIoWW+3TpAMmjfxrDB Kir2YLLA4NDzkbvOr+Z62qdFSisIG8lwgVP4GsiqEDZrhbj+ce0K+bdMGZBHESrvTqlDH eLaUXgqVyWMaCeI5UtrtszHZOJpgtBokGUQ= X-ZohoMail-DKIM: pass (identity @groups.io) Content-Type: text/plain; charset="utf-8" In AARCH32, CCIDX support is indicated in the MMFR4 register - unlike under AARCH64 where it's in MMFR2. Add a helper function to read it. Signed-off-by: Rebecca Cran Reviewed-by: Sami Mujawar Reviewed-by: Leif Lindholm --- ArmPkg/Library/ArmLib/Arm/ArmV7Lib.h | 8 ++++++-- ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S | 4 ++++ ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.asm | 4 ++++ 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.h b/ArmPkg/Library/ArmLib/A= rm/ArmV7Lib.h index bb7bda0a3aeb..dcf6723b803b 100644 --- a/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.h +++ b/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.h @@ -48,9 +48,13 @@ ArmCleanInvalidateDataCacheEntryBySetWay ( IN UINTN SetWayFormat ); =20 -UINTN +/** Reads the ID_MMFR4 register. + + @return The contents of the ID_MMFR4 register. +**/ +UINT32 EFIAPI -ArmReadIdPfr0 ( +ArmReadIdMmfr4 ( VOID ); =20 diff --git a/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S b/ArmPkg/Library/A= rmLib/Arm/ArmLibSupportV7.S index 01c91b10fcb7..a60a2f634132 100644 --- a/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S +++ b/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S @@ -60,6 +60,10 @@ ASM_FUNC(ArmDisableInterrupts) isb bx LR =20 +ASM_FUNC(ArmReadIdMmfr4) + mrc p15,0,r0,c0,c2,6 @ Read ID_MMFR4 Register + bx lr + // UINT32 // ReadCCSIDR ( // IN UINT32 CSSELR diff --git a/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.asm b/ArmPkg/Library= /ArmLib/Arm/ArmLibSupportV7.asm index 26ffa331b929..1679b09b797a 100644 --- a/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.asm +++ b/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.asm @@ -64,6 +64,10 @@ isb bx LR =20 + RVCT_ASM_EXPORT ArmReadIdMmfr4 + mrc p15,0,r0,c0,c2,6 ; Read ID_MMFR4 Register + bx LR + // UINT32 // ReadCCSIDR ( // IN UINT32 CSSELR --=20 2.26.2 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. 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