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powerpc/32: Add ioremap_wt() and ioremap_coherent()

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Other arches have ioremap_wt() to map IO areas write-through.
Implement it on PPC as well in order to avoid drivers using
__ioremap(_PAGE_WRITETHRU)

Also implement ioremap_coherent() to avoid drivers using
__ioremap(_PAGE_COHERENT)

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2018-10-09 13:51:33 +00:00
committed by Michael Ellerman
parent dfd718a2ed
commit 86c391bd5f
3 changed files with 35 additions and 0 deletions
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16
arch/powerpc/mm/pgtable_32.c
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@ -89,6 +89,22 @@ ioremap_wc(phys_addr_t addr, unsigned long size)
}
EXPORT_SYMBOL(ioremap_wc);
void __iomem *
ioremap_wt(phys_addr_t addr, unsigned long size)
{
return __ioremap_caller(addr, size, _PAGE_WRITETHRU,
__builtin_return_address(0));
}
EXPORT_SYMBOL(ioremap_wt);
void __iomem *
ioremap_coherent(phys_addr_t addr, unsigned long size)
{
return __ioremap_caller(addr, size, _PAGE_COHERENT,
__builtin_return_address(0));
}
EXPORT_SYMBOL(ioremap_coherent);
void __iomem *
ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags)
{