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[128.107.239.234]) by mx.google.com with ESMTPSA id ry4sm36533776pab.4.2013.11.04.18.16.31 for (version=TLSv1.2 cipher=AES128-GCM-SHA256 bits=128/128); Mon, 04 Nov 2013 18:16:32 -0800 (PST) From: Victor Kamensky To: linux-arm-kernel@lists.infradead.org, ben.dooks@codethink.co.uk, rmk@arm.linux.org.uk Cc: santosh.shilimkar@ti.com, r.sricharan@ti.com, nicolas.pitre@linaro.org, patches@linaro.org, linaro-kernel@lists.linaro.org, linaro-networking@linaro.org, Victor Kamensky Subject: [PATCH 1/3] ARM: __fixup_smp read of SCU config should do byteswap in BE case Date: Mon, 4 Nov 2013 18:16:03 -0800 Message-Id: <1383617765-28052-2-git-send-email-victor.kamensky@linaro.org> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1383617765-28052-1-git-send-email-victor.kamensky@linaro.org> References: <1383617765-28052-1-git-send-email-victor.kamensky@linaro.org> X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: victor.kamensky@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.212.45 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , Commit "bc41b8724f24b9a27d1dcc6c974b8f686b38d554 ARM: 7846/1: Update SMP_ON_UP code to detect A9MPCore with 1 CPU devices" added read of SCU config register into __fixup_smp function. Such read should be followed by byteswap, if kernel runs in BE mode. Signed-off-by: Victor Kamensky Acked-by: Santosh Shilimkar --- arch/arm/kernel/head.S | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 7801866..cd788d5 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -508,6 +508,7 @@ __fixup_smp: teq r0, #0x0 @ '0' on actual UP A9 hardware beq __fixup_smp_on_up @ So its an A9 UP ldr r0, [r0, #4] @ read SCU Config +ARM_BE8(rev r0, r0) @ byteswap if big endian and r0, r0, #0x3 @ number of CPUs teq r0, #0x0 @ is 1? movne pc, lr