linux-kernel - [PATCH v4 03/22] MIPS: spaces: Define a couple of handy macros

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Message-ID: <20231208161249.1827174-4-gregory.clement@bootlin.com>
Date:   Fri,  8 Dec 2023 17:12:19 +0100
From:   Gregory CLEMENT <gregory.clement@...tlin.com>
To:     Paul Burton <paulburton@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-mips@...r.kernel.org, Jiaxun Yang <jiaxun.yang@...goat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>,
        Tawfik Bayouk <tawfik.bayouk@...ileye.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Théo Lebrun <theo.lebrun@...tlin.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Gregory CLEMENT <gregory.clement@...tlin.com>
Subject: [PATCH v4 03/22] MIPS: spaces: Define a couple of handy macros

KSEGX_SIZE is defined to size of each KSEG segment.

TO_CAC and TO_UNCAC are defined for 32bits builds and point to KSEG 0
and KSEG1.
TO_PHYS remains to be 64bits only as we want people to
use __pa to avoid mixup compat address space.

Co-developed-by: Jiaxun Yang <jiaxun.yang@...goat.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@...tlin.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