diff options
| author | Paul Burton <paul.burton@mips.com> | 2018-08-29 23:54:00 +0200 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2018-08-30 18:41:16 +0200 |
| commit | b962aeb022051915c26dcaba97d3ed0883bef9f5 (patch) | |
| tree | c9ae12a1d25d7988dd937badb7ed11a057ac45b6 /arch/mips/include/asm/io.h | |
| parent | MIPS: Use a custom elf-entry program to find kernel entry point (diff) | |
| download | linux-b962aeb022051915c26dcaba97d3ed0883bef9f5.tar.xz linux-b962aeb022051915c26dcaba97d3ed0883bef9f5.zip | |
MIPS: Use GENERIC_IOMAP
MIPS has a copy of lib/iomap.c with minor alterations, none of which are
necessary given appropriate definitions of PIO_OFFSET, PIO_MASK &
PIO_RESERVED. Provide such definitions, select GENERIC_IOMAP & remove
arch/mips/lib/iomap.c to cut back on the needless duplication.
The one change this does make is to our mmio_{in,out}s[bwl] functions,
which began to deviate from their generic counterparts with commit
0845bb721ebb ("MIPS: iomap: Use __mem_{read,write}{b,w,l} for MMIO"). I
suspect that this commit was incorrect, and that the SEAD-3 platform
should have instead selected CONFIG_SWAP_IO_SPACE. Since the SEAD-3
platform code is now gone & the board is instead supported by the
generic platform (CONFIG_MIPS_GENERIC) which selects
CONFIG_SWAP_IO_SPACE anyway, this shouldn't be a problem any more.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20342/
Cc: linux-mips@linux-mips.org
Diffstat (limited to 'arch/mips/include/asm/io.h')
| -rw-r--r-- | arch/mips/include/asm/io.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h index 54c730aed327..bbbeede9fea1 100644 --- a/arch/mips/include/asm/io.h +++ b/arch/mips/include/asm/io.h @@ -80,6 +80,16 @@ static inline void set_io_port_base(unsigned long base) } /* + * Provide the necessary definitions for generic iomap. We make use of + * mips_io_port_base for iomap(), but we don't reserve any low addresses for + * use with I/O ports. + */ +#define HAVE_ARCH_PIO_SIZE +#define PIO_OFFSET mips_io_port_base +#define PIO_MASK IO_SPACE_LIMIT +#define PIO_RESERVED 0x0UL + +/* * Thanks to James van Artsdalen for a better timing-fix than * the two short jumps: using outb's to a nonexistent port seems * to guarantee better timings even on fast machines. @@ -172,11 +182,6 @@ static inline void *isa_bus_to_virt(unsigned long address) extern void __iomem * __ioremap(phys_addr_t offset, phys_addr_t size, unsigned long flags); extern void __iounmap(const volatile void __iomem *addr); -#ifndef CONFIG_PCI -struct pci_dev; -static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) {} -#endif - static inline void __iomem * __ioremap_mode(phys_addr_t offset, unsigned long size, unsigned long flags) { |