diff options
Diffstat (limited to 'arch/m68k/mm/motorola.c')
| -rw-r--r-- | arch/m68k/mm/motorola.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c index 904c2a663977..8e5e74121a78 100644 --- a/arch/m68k/mm/motorola.c +++ b/arch/m68k/mm/motorola.c @@ -45,6 +45,49 @@ unsigned long mm_cachebits; EXPORT_SYMBOL(mm_cachebits); #endif +/* Prior to calling these routines, the page should have been flushed + * from both the cache and ATC, or the CPU might not notice that the + * cache setting for the page has been changed. -jskov + */ +static inline void nocache_page(void *vaddr) +{ + unsigned long addr = (unsigned long)vaddr; + + if (CPU_IS_040_OR_060) { + pgd_t *dir; + p4d_t *p4dp; + pud_t *pudp; + pmd_t *pmdp; + pte_t *ptep; + + dir = pgd_offset_k(addr); + p4dp = p4d_offset(dir, addr); + pudp = pud_offset(p4dp, addr); + pmdp = pmd_offset(pudp, addr); + ptep = pte_offset_kernel(pmdp, addr); + *ptep = pte_mknocache(*ptep); + } +} + +static inline void cache_page(void *vaddr) +{ + unsigned long addr = (unsigned long)vaddr; + + if (CPU_IS_040_OR_060) { + pgd_t *dir; + p4d_t *p4dp; + pud_t *pudp; + pmd_t *pmdp; + pte_t *ptep; + + dir = pgd_offset_k(addr); + p4dp = p4d_offset(dir, addr); + pudp = pud_offset(p4dp, addr); + pmdp = pmd_offset(pudp, addr); + ptep = pte_offset_kernel(pmdp, addr); + *ptep = pte_mkcache(*ptep); + } +} /* * Motorola 680x0 user's manual recommends using uncached memory for address |