From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753173AbbJWTjm (ORCPT ); Fri, 23 Oct 2015 15:39:42 -0400 Received: from mail.kernel.org ([198.145.29.136]:59624 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751726AbbJWTjk (ORCPT ); Fri, 23 Oct 2015 15:39:40 -0400 Message-ID: <562A8CF4.9040408@kernel.org> Date: Sat, 24 Oct 2015 04:39:32 +0900 From: Kukjin Kim User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Lightning/1.0b3pre Thunderbird/3.1.16 MIME-Version: 1.0 To: Krzysztof Kozlowski CC: Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Kukjin Kim , linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Javier Martinez Canillas Subject: Re: [PATCH] Documentation: ARM: EXYNOS: Update bootloader interface on Exynos542x References: <1445573957-28933-1-git-send-email-k.kozlowski@samsung.com> In-Reply-To: <1445573957-28933-1-git-send-email-k.kozlowski@samsung.com> X-Enigmail-Version: 1.1.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/23/15 13:19, Krzysztof Kozlowski wrote: > Update the documentation about: > 1. Usage of PMU_SPARE2 register. > Bootloaders on Exynos542x-based boards often use the register > PMU_SPARE2 (0x908) in the same way as on Exynos3250: as a indicator > the secondary CPU was booted on. The bootloader will set this value > to non-zero, after sucessfull power up of secondary CPU. In the same > time this booted CPU will stuck (spin) waiting for software reset. > 2. Exynos542x entry address for secondary CPU boot up after system > suspend (with MCPM enabled and in non-secure mode). > > See arch/arm/mach-exynos/mcpm-exynos.c for source code. > > Signed-off-by: Krzysztof Kozlowski > --- > Documentation/arm/Samsung/Bootloader-interface.txt | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/Documentation/arm/Samsung/Bootloader-interface.txt b/Documentation/arm/Samsung/Bootloader-interface.txt > index df8d4fb85939..ed494ac0beb2 100644 > --- a/Documentation/arm/Samsung/Bootloader-interface.txt > +++ b/Documentation/arm/Samsung/Bootloader-interface.txt > @@ -19,7 +19,7 @@ executing kernel. > Address: sysram_ns_base_addr > Offset Value Purpose > ============================================================================= > -0x08 exynos_cpu_resume_ns System suspend > +0x08 exynos_cpu_resume_ns, mcpm_entry_point System suspend > 0x0c 0x00000bad (Magic cookie) System suspend > 0x1c exynos4_secondary_startup Secondary CPU boot > 0x1c + 4*cpu exynos4_secondary_startup (Exynos4412) Secondary CPU boot > @@ -56,7 +56,8 @@ Offset Value Purpose > Address: pmu_base_addr > Offset Value Purpose > ============================================================================= > -0x0908 Non-zero (only Exynos3250) Secondary CPU boot up indicator > +0x0908 Non-zero Secondary CPU boot up indicator > + on Exynos3250 and Exynos542x > > > 4. Glossary Applied, thanks. - Kukjin