linux-kernel - [PATCH v2 02/10] MIPS: spaces: Define a couple of handy macros

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Message-Id: <20231027221106.405666-3-jiaxun.yang@flygoat.com>
Date:   Fri, 27 Oct 2023 23:10:58 +0100
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     linux-mips@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, tsbogend@...ha.franken.de,
        gregory.clement@...tlin.com, vladimir.kondratiev@...el.com,
        Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: [PATCH v2 02/10] MIPS: spaces: Define a couple of handy macros

KSEGX_SIZE is defined to size of each KSEG segment.

TO_CAC and TO_UNCAC are brought to 32bit builds as well,
TO_PHYS remains to be 64bit only as we want people to
use __pa to avoid mixup compat address space.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
 arch/mips/include/asm/addrspace.h           | 5 +++++
 arch/mips/include/asm/mach-generic/spaces.h | 5 +++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/addrspace.h b/arch/mips/include/asm/addrspace.h
index 59a48c60a065..03a5e2c8b5dc 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 b247575c5e69..05db19521e81 100644
--- a/arch/mips/include/asm/mach-generic/spaces.h
+++ b/arch/mips/include/asm/mach-generic/spaces.h
@@ -79,11 +79,12 @@
 #endif
 
 #define TO_PHYS(x)		(	      ((x) & TO_PHYS_MASK))
-#define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
-#define TO_UNCAC(x)		(UNCAC_BASE | ((x) & TO_PHYS_MASK))
 
 #endif /* CONFIG_64BIT */
 
+#define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
+#define TO_UNCAC(x)		(UNCAC_BASE | ((x) & TO_PHYS_MASK))
+
 /*
  * This handles the memory map.
  */
-- 
2.34.1