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m68k/nommu: stop using GENERIC_IOMAP

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There is no need to go through the GENERIC_IOMAP wrapper for PIO on
nommu platforms, since these always come from PCI I/O space that is
itself memory mapped.

Instead, the generic ioport_map() can just return the MMIO location
of the ports directly by applying the PCI_IO_PA offset, while
ioread32/iowrite32 trivially turn into readl/writel as they do
on most other architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2025-03-11 12:01:13 +01:00
parent 976bf3aec3
commit 9d48cc07d0
2 changed files with 1 additions and 5 deletions
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2
arch/m68k/Kconfig
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@ -18,7 +18,7 @@ config M68K
select DMA_DIRECT_REMAP if M68K_NONCOHERENT_DMA && !COLDFIRE
select GENERIC_ATOMIC64
select GENERIC_CPU_DEVICES
select GENERIC_IOMAP if HAS_IOPORT
select GENERIC_IOMAP if HAS_IOPORT && MMU
select GENERIC_IRQ_SHOW
select GENERIC_LIB_ASHLDI3
select GENERIC_LIB_ASHRDI3

4
arch/m68k/include/asm/io_no.h
View File

@ -123,10 +123,6 @@ static inline void writel(u32 value, volatile void __iomem *addr)
#define PCI_IO_SIZE 0x00010000 /* 64k */
#define PCI_IO_MASK (PCI_IO_SIZE - 1)
#define HAVE_ARCH_PIO_SIZE
#define PIO_OFFSET 0
#define PIO_MASK 0xffff
#define PIO_RESERVED 0x10000
#define PCI_IOBASE ((void __iomem *) PCI_IO_PA)
#define PCI_SPACE_LIMIT PCI_IO_MASK
#endif /* CONFIG_PCI */