jcs.org
jcs's openbsd hax
openbsd
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
34bool is_vmalloc_addr(const void *);
35
36static inline void *
37kvmalloc(size_t size, gfp_t flags)
38{
39 return malloc(size, M_DRM, flags);
40}
41
42static inline void *
43kvmalloc_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
50static inline struct vm_page *
51vmalloc_to_page(const void *va)
52{
53 return uvm_atopg((vaddr_t)va);
54}
55
56static inline struct vm_page *
57virt_to_page(const void *va)
58{
59 return uvm_atopg((vaddr_t)va);
60}
61
62static inline void *
63kvcalloc(size_t n, size_t size, int flags)
64{
65 return kvmalloc_array(n, size, flags | M_ZERO);
66}
67
68static inline void *
69kvzalloc(size_t size, int flags)
70{
71 return malloc(size, M_DRM, flags | M_ZERO);
72}
73
74static inline void
75kvfree(const void *objp)
76{
77 free((void *)objp, M_DRM, 0);
78}
79
80static inline long
81si_mem_available(void)
82{
83 return uvmexp.free;
84}
85
86static inline unsigned int
87get_order(size_t size)
88{
89 return flsl((size - 1) >> PAGE_SHIFT);
90}
91
92static inline long
93totalram_pages(void)
94{
95 return uvmexp.npages;
96}
97
98static inline bool
99want_init_on_free(void)
100{
101 return false;
102}
103
104#endif