1 /* Public domain. */ 2 3 #ifndef _LINUX_MM_H 4 #define _LINUX_MM_H 5 6 #include <sys/types.h> 7 #include <sys/param.h> 8 #include <sys/malloc.h> 9 #include <sys/stdint.h> 10 #include <sys/atomic.h> 11 #include <machine/cpu.h> 12 #include <uvm/uvm_extern.h> 13 #include <linux/fs.h> 14 #include <linux/shrinker.h> 15 #include <linux/overflow.h> 16 #include <asm/pgtable.h> 17 18 #define PageHighMem(x) 0 19 20 #define page_to_phys(page) (VM_PAGE_TO_PHYS(page)) 21 #define page_to_pfn(pp) (VM_PAGE_TO_PHYS(pp) / PAGE_SIZE) 22 #define pfn_to_page(pfn) (PHYS_TO_VM_PAGE(ptoa(pfn))) 23 #define nth_page(page, n) (&(page)[(n)]) 24 #define offset_in_page(off) ((vaddr_t)(off) & PAGE_MASK) 25 #define set_page_dirty(page) atomic_clearbits_int(&page->pg_flags, PG_CLEAN) 26 27 #define PAGE_ALIGN(addr) (((addr) + PAGE_MASK) & ~PAGE_MASK) 28 29 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) 30 #define PFN_DOWN(x) ((x) >> PAGE_SHIFT) 31 #define PFN_PHYS(x) ((x) << PAGE_SHIFT) 32 33 bool is_vmalloc_addr(const void *); 34 35 void *kvmalloc(size_t, gfp_t); 36 void kvfree(const void *); 37 38 static inline void * 39 kvmalloc_array(size_t n, size_t size, gfp_t flags) 40 { 41 if (n != 0 && SIZE_MAX / n < size) 42 return NULL; 43 return kvmalloc(n * size, flags); 44 } 45 46 static inline void * 47 kvcalloc(size_t n, size_t size, gfp_t flags) 48 { 49 if (n != 0 && SIZE_MAX / n < size) 50 return NULL; 51 return kvmalloc(n * size, flags | M_ZERO); 52 } 53 54 static inline void * 55 kvzalloc(size_t size, gfp_t flags) 56 { 57 return kvmalloc(size, flags | M_ZERO); 58 } 59 60 static inline long 61 si_mem_available(void) 62 { 63 return uvmexp.free; 64 } 65 66 #define MAX_ORDER 11 67 68 static inline unsigned int 69 get_order(size_t size) 70 { 71 return flsl((size - 1) >> PAGE_SHIFT); 72 } 73 74 #endif 75