Commit 60080265 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

Define kmap_atomic_pfn() for MIPS.


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 129bc8f7
......@@ -83,6 +83,25 @@ void __kunmap_atomic(void *kvaddr, enum km_type type)
preempt_check_resched();
}
/*
* This is the same as kmap_atomic() but can map memory that doesn't
* have a struct page associated with it.
*/
void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
{
enum fixed_addresses idx;
unsigned long vaddr;
inc_preempt_count();
idx = type + KM_TYPE_NR*smp_processor_id();
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
set_pte(kmap_pte-idx, pfn_pte(pfn, kmap_prot));
flush_tlb_one(vaddr);
return (void*) vaddr;
}
struct page *__kmap_atomic_to_page(void *ptr)
{
unsigned long idx, vaddr = (unsigned long)ptr;
......
......@@ -75,6 +75,7 @@ static inline void *kmap_atomic(struct page *page, enum km_type type)
}
static inline void kunmap_atomic(void *kvaddr, enum km_type type) { }
#define kmap_atomic_pfn(pfn, idx) page_address(pfn_to_page(pfn))
#define kmap_atomic_to_page(ptr) virt_to_page(ptr)
......@@ -86,6 +87,7 @@ extern void *__kmap(struct page *page);
extern void __kunmap(struct page *page);
extern void *__kmap_atomic(struct page *page, enum km_type type);
extern void __kunmap_atomic(void *kvaddr, enum km_type type);
extern void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
extern struct page *__kmap_atomic_to_page(void *ptr);
#define kmap __kmap
......
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