[PATCH v4 3/5] MIPS: Loongson64: Enlarge IO_SPACE_LIMIT

[Jiaxun Yang]

It can be very big on LS7A PCH systems.

Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
--
v3: Move IO_SPACE_LIMIT to spaces.h
---
 arch/mips/include/asm/io.h                     | 2 --
 arch/mips/include/asm/mach-generic/spaces.h    | 4 ++++
 arch/mips/include/asm/mach-loongson64/spaces.h | 3 +--
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index 346fffd9e972..8ca53f17c7c2 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -51,8 +51,6 @@
 
 /* ioswab[bwlq], __mem_ioswab[bwlq] are defined in mangle-port.h */
 
-#define IO_SPACE_LIMIT 0xffff
-
 /*
  * On MIPS I/O ports are memory mapped, so we access them using normal
  * load/store instructions. mips_io_port_base is the virtual address to
diff --git a/arch/mips/include/asm/mach-generic/spaces.h b/arch/mips/include/asm/mach-generic/spaces.h
index ee5ebe98f6cf..c3ac06a6acd2 100644
--- a/arch/mips/include/asm/mach-generic/spaces.h
+++ b/arch/mips/include/asm/mach-generic/spaces.h
@@ -14,6 +14,10 @@
 
 #include <asm/mipsregs.h>
 
+#ifndef IO_SPACE_LIMIT
+#define IO_SPACE_LIMIT 0xffff
+#endif
+
 /*
  * This gives the physical RAM offset.
  */
diff --git a/arch/mips/include/asm/mach-loongson64/spaces.h b/arch/mips/include/asm/mach-loongson64/spaces.h
index 3de0ac9d8829..ce04e998a37b 100644
--- a/arch/mips/include/asm/mach-loongson64/spaces.h
+++ b/arch/mips/include/asm/mach-loongson64/spaces.h
@@ -11,8 +11,7 @@
 #define PCI_IOSIZE	SZ_16M
 #define MAP_BASE	(PCI_IOBASE + PCI_IOSIZE)
 
-/* Reserved at the start of PCI_IOBASE for legacy drivers */
-#define MMIO_LOWER_RESERVED	0x10000
+#define IO_SPACE_LIMIT  (PCI_IOSIZE - 1)
 
 #include <asm/mach-generic/spaces.h>
 #endif
-- 
2.28.0.rc1