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author | Nicholas Piggin <npiggin@gmail.com> | 2019-06-10 13:08:17 +1000 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-06-19 20:05:09 +1000 |
commit | d38153f9ccc9b6b6a27a91559999292c27b72b8c (patch) | |
tree | 4973187ccc5391cf51c9fa5eade9140a57ea7bfd /arch/powerpc/mm/book3s64/pgtable.c | |
parent | a72808a7ec5d340417a91a81e5cabdaa50650f2e (diff) | |
download | linux-d38153f9ccc9b6b6a27a91559999292c27b72b8c.tar.bz2 |
powerpc/64s/radix: ioremap use ioremap_page_range
Radix can use ioremap_page_range for ioremap, after slab is available.
This makes it possible to enable huge ioremap mapping support.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/book3s64/pgtable.c')
-rw-r--r-- | arch/powerpc/mm/book3s64/pgtable.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index 16bda049187a..ad3dd977c22d 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -447,3 +447,24 @@ int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl, return true; } + +int ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size, pgprot_t prot, int nid) +{ + unsigned long i; + + if (radix_enabled()) + return radix__ioremap_range(ea, pa, size, prot, nid); + + for (i = 0; i < size; i += PAGE_SIZE) { + int err = map_kernel_page(ea + i, pa + i, prot); + if (err) { + if (slab_is_available()) + unmap_kernel_range(ea, size); + else + WARN_ON_ONCE(1); /* Should clean up */ + return err; + } + } + + return 0; +} |