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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-08-20 16:07:19 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-27 05:03:35 +0200 |
| commit | 4a45b7460cf458012a6930f675e141256b81dcf4 (patch) | |
| tree | 20eb37cd0bb73b81a000e32e811b9f4ea39c05ff /arch/powerpc/include/asm/io.h | |
| parent | powerpc/mm: refactor ioremap_range() and use ioremap_page_range() (diff) | |
| download | linux-4a45b7460cf458012a6930f675e141256b81dcf4.tar.xz linux-4a45b7460cf458012a6930f675e141256b81dcf4.zip | |
powerpc/mm: refactor ioremap vm area setup.
PPC32 and PPC64 are doing the same once SLAB is available.
Create a do_ioremap() function that calls get_vm_area and
do the mapping.
For PPC64, we add the 4K PFN hack sanity check to __ioremap_caller()
in order to avoid using __ioremap_at(). Other checks in __ioremap_at()
are irrelevant for __ioremap_caller().
On PPC64, VM area is allocated in the range [ioremap_bot ; IOREMAP_END]
On PPC32, VM area is allocated in the range [VMALLOC_START ; VMALLOC_END]
Lets define IOREMAP_START is ioremap_bot for PPC64, and alias
IOREMAP_START/END to VMALLOC_START/END on PPC32
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/42e7e36ad32e0fdf76692426cc642799c9f689b8.1566309263.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/include/asm/io.h')
| -rw-r--r-- | arch/powerpc/include/asm/io.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 8e00d95f9600..dc529ea0fffa 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -723,6 +723,8 @@ void __iomem *ioremap_coherent(phys_addr_t address, unsigned long size); extern void iounmap(volatile void __iomem *addr); int ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size, pgprot_t prot); +void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size, + pgprot_t prot, void *caller); extern void __iomem *__ioremap_caller(phys_addr_t, unsigned long size, pgprot_t prot, void *caller); |