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

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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@xxxxxxxxxxx>
Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxx>
---
 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





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