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| author | David S. Miller <davem@sunset.davemloft.net> | 2006-03-21 13:29:39 +0300 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-22 12:15:13 +0300 |
| commit | 14778d9072e53d2171f66ffd9657daff41acfaed (patch) | |
| tree | 3b60565ec1e957800fc3bf4743497202a24f8279 /arch/sparc/mm/sun4c.c | |
| parent | e952f31bce6e9f64db01f607abc46529ba57ac9e (diff) | |
| download | linux-14778d9072e53d2171f66ffd9657daff41acfaed.tar.xz | |
[SPARC]: Respect vm_page_prot in io_remap_page_range().
Make sure the callers do a pgprot_noncached() on
vma->vm_page_prot.
Pointed out by Hugh Dickens.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/mm/sun4c.c')
| -rw-r--r-- | arch/sparc/mm/sun4c.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c index 731f19603cad..49f28c1bdc6d 100644 --- a/arch/sparc/mm/sun4c.c +++ b/arch/sparc/mm/sun4c.c @@ -1589,7 +1589,10 @@ static void sun4c_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) static inline void sun4c_mapioaddr(unsigned long physaddr, unsigned long virt_addr) { - unsigned long page_entry; + unsigned long page_entry, pg_iobits; + + pg_iobits = _SUN4C_PAGE_PRESENT | _SUN4C_READABLE | _SUN4C_WRITEABLE | + _SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE; page_entry = ((physaddr >> PAGE_SHIFT) & SUN4C_PFN_MASK); page_entry |= ((pg_iobits | _SUN4C_PAGE_PRIV) & ~(_SUN4C_PAGE_PRESENT)); @@ -2134,6 +2137,13 @@ void __init sun4c_paging_init(void) printk("SUN4C: %d mmu entries for the kernel\n", cnt); } +static pgprot_t sun4c_pgprot_noncached(pgprot_t prot) +{ + prot |= __pgprot(_SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE); + + return prot; +} + /* Load up routines and constants for sun4c mmu */ void __init ld_mmu_sun4c(void) { @@ -2156,10 +2166,9 @@ void __init ld_mmu_sun4c(void) BTFIXUPSET_INT(page_readonly, pgprot_val(SUN4C_PAGE_READONLY)); BTFIXUPSET_INT(page_kernel, pgprot_val(SUN4C_PAGE_KERNEL)); page_kernel = pgprot_val(SUN4C_PAGE_KERNEL); - pg_iobits = _SUN4C_PAGE_PRESENT | _SUN4C_READABLE | _SUN4C_WRITEABLE | - _SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE; /* Functions */ + BTFIXUPSET_CALL(pgprot_noncached, sun4c_pgprot_noncached, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(___xchg32, ___xchg32_sun4c, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(do_check_pgt_cache, sun4c_check_pgt_cache, BTFIXUPCALL_NORM); |