diff options
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 78 |
1 files changed, 38 insertions, 40 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 6b24e5ed85c2..19357f76ce89 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -144,6 +144,44 @@ static struct arm_vmregion_head consistent_head = { #error ARM Coherent DMA allocator does not (yet) support huge TLB #endif +/* + * Initialise the consistent memory allocation. + */ +static int __init consistent_init(void) +{ + int ret = 0; + pgd_t *pgd; + pmd_t *pmd; + pte_t *pte; + int i = 0; + u32 base = CONSISTENT_BASE; + + do { + pgd = pgd_offset(&init_mm, base); + pmd = pmd_alloc(&init_mm, pgd, base); + if (!pmd) { + printk(KERN_ERR "%s: no pmd tables\n", __func__); + ret = -ENOMEM; + break; + } + WARN_ON(!pmd_none(*pmd)); + + pte = pte_alloc_kernel(pmd, base); + if (!pte) { + printk(KERN_ERR "%s: no pte tables\n", __func__); + ret = -ENOMEM; + break; + } + + consistent_pte[i++] = pte; + base += (1 << PGDIR_SHIFT); + } while (base < CONSISTENT_END); + + return ret; +} + +core_initcall(consistent_init); + static void * __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, pgprot_t prot) @@ -400,46 +438,6 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr EXPORT_SYMBOL(dma_free_coherent); /* - * Initialise the consistent memory allocation. - */ -static int __init consistent_init(void) -{ - int ret = 0; -#ifdef CONFIG_MMU - pgd_t *pgd; - pmd_t *pmd; - pte_t *pte; - int i = 0; - u32 base = CONSISTENT_BASE; - - do { - pgd = pgd_offset(&init_mm, base); - pmd = pmd_alloc(&init_mm, pgd, base); - if (!pmd) { - printk(KERN_ERR "%s: no pmd tables\n", __func__); - ret = -ENOMEM; - break; - } - WARN_ON(!pmd_none(*pmd)); - - pte = pte_alloc_kernel(pmd, base); - if (!pte) { - printk(KERN_ERR "%s: no pte tables\n", __func__); - ret = -ENOMEM; - break; - } - - consistent_pte[i++] = pte; - base += (1 << PGDIR_SHIFT); - } while (base < CONSISTENT_END); -#endif /* !CONFIG_MMU */ - - return ret; -} - -core_initcall(consistent_init); - -/* * Make an area consistent for devices. * Note: Drivers should NOT use this function directly, as it will break * platforms with CONFIG_DMABOUNCE. |