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MIPS: Loongson64: Define PCI_IOBASE

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PCI_IOBASE is used to create VM maps for PCI I/O ports, it is
required by generic PCI drivers to make memory mapped I/O range
work.

To deal with legacy drivers that have fixed I/O ports range we
reserved 0x10000 in PCI_IOBASE, should be enough for i8259 i8042
stuff.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Jiaxun Yang
2020-05-27 21:17:21 +08:00
committed by Thomas Bogendoerfer
parent a202bf71f0
commit 482cd90cd7
2 changed files with 48 additions and 2 deletions
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8
arch/mips/include/asm/mach-loongson64/spaces.h
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@@ -6,5 +6,13 @@
#define CAC_BASE _AC(0x9800000000000000, UL)
#endif /* CONFIG_64BIT */
/* Skip 128k to trap NULL pointer dereferences */
#define PCI_IOBASE _AC(0xc000000000000000 + SZ_128K, UL)
#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
#include <asm/mach-generic/spaces.h>
#endif