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 <uvm/uvm_glue.h>
14 #include <lib/libkern/libkern.h> /* for flsl */
15 #include <linux/shrinker.h>
16 #include <linux/overflow.h>
17 #include <linux/pgtable.h>
18
19 #define PageHighMem(x) 0
20
21 #define page_to_phys(page) (VM_PAGE_TO_PHYS(page))
22 #define page_to_pfn(pp) (VM_PAGE_TO_PHYS(pp) / PAGE_SIZE)
23 #define pfn_to_page(pfn) (PHYS_TO_VM_PAGE(ptoa(pfn)))
24 #define nth_page(page, n) (&(page)[(n)])
25 #define offset_in_page(off) ((vaddr_t)(off) & PAGE_MASK)
26 #define set_page_dirty(page) atomic_clearbits_int(&page->pg_flags, PG_CLEAN)
27
28 #define PAGE_ALIGN(addr) (((addr) + PAGE_MASK) & ~PAGE_MASK)
29
30 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
31 #define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
32 #define PFN_PHYS(x) ((x) << PAGE_SHIFT)
33
34 bool is_vmalloc_addr(const void *);
35
36 static inline void *
kvmalloc(size_t size,gfp_t flags)37 kvmalloc(size_t size, gfp_t flags)
38 {
39 return malloc(size, M_DRM, flags);
40 }
41
42 static inline void *
kvmalloc_array(size_t n,size_t size,int flags)43 kvmalloc_array(size_t n, size_t size, int flags)
44 {
45 if (n != 0 && SIZE_MAX / n < size)
46 return NULL;
47 return malloc(n * size, M_DRM, flags);
48 }
49
50 static inline struct vm_page *
vmalloc_to_page(const void * va)51 vmalloc_to_page(const void *va)
52 {
53 return uvm_atopg((vaddr_t)va);
54 }
55
56 static inline struct vm_page *
virt_to_page(const void * va)57 virt_to_page(const void *va)
58 {
59 return uvm_atopg((vaddr_t)va);
60 }
61
62 static inline void *
kvcalloc(size_t n,size_t size,int flags)63 kvcalloc(size_t n, size_t size, int flags)
64 {
65 return kvmalloc_array(n, size, flags | M_ZERO);
66 }
67
68 static inline void *
kvzalloc(size_t size,int flags)69 kvzalloc(size_t size, int flags)
70 {
71 return malloc(size, M_DRM, flags | M_ZERO);
72 }
73
74 static inline void
kvfree(const void * objp)75 kvfree(const void *objp)
76 {
77 free((void *)objp, M_DRM, 0);
78 }
79
80 static inline long
si_mem_available(void)81 si_mem_available(void)
82 {
83 return uvmexp.free;
84 }
85
86 static inline unsigned int
get_order(size_t size)87 get_order(size_t size)
88 {
89 return flsl((size - 1) >> PAGE_SHIFT);
90 }
91
92 static inline int
totalram_pages(void)93 totalram_pages(void)
94 {
95 return uvmexp.npages;
96 }
97
98 static inline bool
want_init_on_free(void)99 want_init_on_free(void)
100 {
101 return false;
102 }
103
104 #endif
105