MIPS: Loongson64: Enlarge IO_SPACE_LIMIT

It can be very big on LS7A PCH systems. Signed-off-by: Jiaxun Yang <[email protected]> Signed-off-by: Thomas Bogendoerfer <[email protected]>
josf · Jul 28, 2020 · 21a379a · 21a379a
1 parent 6d0068a
commit 21a379a
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Showing 3 changed files with 5 additions and 4 deletions.
diff --git 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
@@ -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
@@ -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