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From:   Gregory CLEMENT <gregory.clement@bootlin.com>
To:     Paul Burton <paulburton@kernel.org>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        linux-mips@vger.kernel.org, Jiaxun Yang <jiaxun.yang@flygoat.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>,
        Tawfik Bayouk <tawfik.bayouk@mobileye.com>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        =?UTF-8?q?Th=C3=A9o=20Lebrun?= <theo.lebrun@bootlin.com>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        Gregory CLEMENT <gregory.clement@bootlin.com>
Subject: [PATCH v5 03/22] MIPS: spaces: Define a couple of handy macros
Date:   Tue, 12 Dec 2023 17:34:35 +0100
Message-ID: <20231212163459.1923041-4-gregory.clement@bootlin.com>
In-Reply-To: <20231212163459.1923041-1-gregory.clement@bootlin.com>
References: <20231212163459.1923041-1-gregory.clement@bootlin.com>
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Define KSEGX_SIZE to represent the size of each KSEG segment.

Introduce TO_CAC and TO_UNCAC specifically for 32-bit builds, pointing
to KSEG0 and KSEG1.

TO_PHYS remains exclusive to 64-bit builds to encourage the use of
__pa and prevent compatibility address space confusion.

KSEGX_SIZE is defined to size of each KSEG segment.

Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
---
 arch/mips/include/asm/addrspace.h           | 5 +++++
 arch/mips/include/asm/mach-generic/spaces.h | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/arch/mips/include/asm/addrspace.h b/arch/mips/include/asm/addrspace.h
index 59a48c60a065c..03a5e2c8b5dc9 100644
--- a/arch/mips/include/asm/addrspace.h
+++ b/arch/mips/include/asm/addrspace.h
@@ -47,6 +47,11 @@
  */
 #define KSEGX(a)		((_ACAST32_(a)) & _ACAST32_(0xe0000000))
 
+/*
+ * Gives the size of each kernel segment
+ */
+#define KSEGX_SIZE		0x20000000
+
 /*
  * Returns the physical address of a CKSEGx / XKPHYS address
  */
diff --git a/arch/mips/include/asm/mach-generic/spaces.h b/arch/mips/include/asm/mach-generic/spaces.h
index b247575c5e699..c502bdd98aad0 100644
--- a/arch/mips/include/asm/mach-generic/spaces.h
+++ b/arch/mips/include/asm/mach-generic/spaces.h
@@ -49,6 +49,8 @@
 #define HIGHMEM_START		_AC(0x20000000, UL)
 #endif
 
+#define TO_UNCAC(x)		CKSEG1ADDR(x)
+#define TO_CAC(x)		CKSEG0ADDR(x)
 #endif /* CONFIG_32BIT */
 
 #ifdef CONFIG_64BIT
-- 
2.42.0