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Commit 15444a89 authored by David McKay's avatar David McKay Committed by Paul Mundt
Browse files

sh: Allow use of GENERIC_IOMAP 



The synopsys PCI cell used in the later STMicro chips requires code to
be run in order to do IO cycles, rather than just memory mapping the IO
space. Rather than extending the existing SH infrastructure to allow
this, use the GENERIC_IOMAP implmentation to save re-inventing the
wheel.

This set of changes allows the SH to be built with GENERIC_IOMAP
enabled, it just ifdef's out the functions provided by the GENERIC_IOMAP
implementation, and provides a few required missing functions.

Signed-off-by: default avatarDavid McKay <david.mckay@st.com>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 2fc742f8

arch/sh/drivers/pci/pci.c

+4 −0
Original line number Diff line number Diff line
@@ -295,6 +295,8 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, 
			       vma->vm_page_prot);

}



#ifndef CONFIG_GENERIC_IOMAP



static void __iomem *ioport_map_pci(struct pci_dev *dev,

				    unsigned long port, unsigned int nr)

{
@@ -346,6 +348,8 @@ void pci_iounmap(struct pci_dev *dev, void __iomem *addr) 
}

EXPORT_SYMBOL(pci_iounmap);



#endif /* CONFIG_GENERIC_IOMAP */



#ifdef CONFIG_HOTPLUG

EXPORT_SYMBOL(pcibios_resource_to_bus);

EXPORT_SYMBOL(pcibios_bus_to_resource);

arch/sh/include/asm/io.h

+10 −0
Original line number Diff line number Diff line
@@ -146,6 +146,7 @@ __BUILD_MEMORY_STRING(q, u64) 
#define readl_relaxed(a)	readl(a)

#define readq_relaxed(a)	readq(a)



#ifndef CONFIG_GENERIC_IOMAP

/* Simple MMIO */

#define ioread8(a)		__raw_readb(a)

#define ioread16(a)		__raw_readw(a)
@@ -166,6 +167,15 @@ __BUILD_MEMORY_STRING(q, u64) 
#define iowrite8_rep(a, s, c)	__raw_writesb((a), (s), (c))

#define iowrite16_rep(a, s, c)	__raw_writesw((a), (s), (c))

#define iowrite32_rep(a, s, c)	__raw_writesl((a), (s), (c))

#endif



#define mmio_insb(p,d,c)	__raw_readsb(p,d,c)

#define mmio_insw(p,d,c)	__raw_readsw(p,d,c)

#define mmio_insl(p,d,c)	__raw_readsl(p,d,c)



#define mmio_outsb(p,s,c)	__raw_writesb(p,s,c)

#define mmio_outsw(p,s,c)	__raw_writesw(p,s,c)

#define mmio_outsl(p,s,c)	__raw_writesl(p,s,c)



/* synco on SH-4A, otherwise a nop */

#define mmiowb()		wmb()

arch/sh/kernel/io.c

+4 −0
Original line number Diff line number Diff line
@@ -62,6 +62,8 @@ void memset_io(volatile void __iomem *dst, int c, unsigned long count) 
}

EXPORT_SYMBOL(memset_io);



#ifndef CONFIG_GENERIC_IOMAP



void __iomem *ioport_map(unsigned long port, unsigned int nr)

{

	void __iomem *ret;
@@ -79,3 +81,5 @@ void ioport_unmap(void __iomem *addr) 
	sh_mv.mv_ioport_unmap(addr);

}

EXPORT_SYMBOL(ioport_unmap);



#endif /* CONFIG_GENERIC_IOMAP */