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From:   Hector Martin <marcan@marcan.st>
To:     linux-arm-kernel@lists.infradead.org
Cc:     Hector Martin <marcan@marcan.st>, Marc Zyngier <maz@kernel.org>,
        Rob Herring <robh@kernel.org>, Arnd Bergmann <arnd@kernel.org>,
        Olof Johansson <olof@lixom.net>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        Mark Kettenis <mark.kettenis@xs4all.nl>,
        Tony Lindgren <tony@atomide.com>,
        Mohamed Mediouni <mohamed.mediouni@caramail.com>,
        Stan Skowronek <stan@corellium.com>,
        Alexander Graf <graf@amazon.com>,
        Will Deacon <will@kernel.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Christoph Hellwig <hch@infradead.org>,
        "David S. Miller" <davem@davemloft.net>,
        devicetree@vger.kernel.org, linux-doc@vger.kernel.org,
        linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 10/18] arm64: Implement ioremap_np() to map MMIO as nGnRnE
Date:   Fri,  2 Apr 2021 18:05:34 +0900
Message-Id: <20210402090542.131194-11-marcan@marcan.st>
In-Reply-To: <20210402090542.131194-1-marcan@marcan.st>
References: <20210402090542.131194-1-marcan@marcan.st>
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This is used on Apple ARM platforms, which require most MMIO
(except PCI devices) to be mapped as nGnRnE.

Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>
---
 arch/arm64/include/asm/io.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 5ea8656a2030..953b8703af60 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -169,6 +169,7 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
 
 #define ioremap(addr, size)		__ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
 #define ioremap_wc(addr, size)		__ioremap((addr), (size), __pgprot(PROT_NORMAL_NC))
+#define ioremap_np(addr, size)		__ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRnE))
 
 /*
  * PCI configuration space mapping function.
-- 
2.30.0