linux-kernel - [PATCH 4/9] ARM: add CONFIG_PHYS

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Message-Id: <1455804123-2526139-5-git-send-email-arnd@arndb.de>
Date:	Thu, 18 Feb 2016 15:01:56 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Russell King <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Nicolas Pitre <nico@...aro.org>,
	Jon Medhurst <tixy@...aro.org>,
	Marc Zyngier <marc.zyngier@....com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/9] ARM: add CONFIG_PHYS_OFFSET default values

For platforms that are not yet converted to ARCH_MULTIPLATFORM,
we can disable CONFIG_ARM_PATCH_PHYS_VIRT, which in turn requires
setting a correct address here.

As we actualy know what all the values are supposed to be based
on the old mach/memory.h header file contents (from git history),
we can just add them here.

This also solves a problem in Kconfig where 'make randconfig'
fails to continue if no number is selected for a 'hex' option.
Users can still override the number at configuration time, e.g.
when the memory visible to the kernel starts at a nonstandard
address on some machine, but it should no longer be required
now.

To make this foolproof, another patch is required in mach-davinci
to prevent a configuration with both DMx and DA8xx enabled but
ARM_PATCH_PHYS_VIRT disabled. The two patches however can be
merged independently as there is no direct dependency between
them.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm/Kconfig | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index be00b53f399b..7839c9923709 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -271,15 +271,29 @@ config PHYS_OFFSET
 	depends on !ARM_PATCH_PHYS_VIRT
 	default DRAM_BASE if !MMU
 	default 0x00000000 if ARCH_EBSA110 || \
+			ARCH_DOVE || \
 			ARCH_FOOTBRIDGE || \
+			(ARCH_GEMINI && GEMINI_MEM_SWAP) || \
 			ARCH_INTEGRATOR || \
+			ARCH_IOP33X || \
 			ARCH_IOP13XX || \
+			ARCH_IXP4XX || \
 			ARCH_KS8695 || \
-			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
-	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
+			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET) || \
+			ARCH_W90X900
+	default 0x10000000 if (ARCH_GEMINI && !GEMINI_MEM_SWAP) || \
+			ARCH_OMAP1 || \
+			ARCH_RPC
 	default 0x20000000 if ARCH_S5PV210
+	default 0x30000000 if ARCH_S3C24XX
 	default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
-	default 0xc0000000 if ARCH_SA1100
+	default 0x80000000 if (ARCH_DAVINCI_DMx && !ARCH_DAVINCI_DA8XX) || \
+			ARCH_NETX || \
+			ARCH_LPC32XX
+	default 0xa0000000 if ARCH_IOP32X || ARCH_PXA
+	default 0xc0000000 if (ARCH_DAVINCI_DA8XX && !ARCH_DAVINCI_DMx) || \
+			ARCH_CLPS711X || \
+			ARCH_SA1100
 	help
 	  Please provide the physical address corresponding to the
 	  location of main memory in your system.
-- 
2.7.0