1433d6423SLionel Sambuc
2433d6423SLionel Sambuc #include "syslib.h"
3433d6423SLionel Sambuc
4433d6423SLionel Sambuc #include <stdlib.h>
5433d6423SLionel Sambuc #include <errno.h>
6433d6423SLionel Sambuc #include <sys/mman.h>
7433d6423SLionel Sambuc #include <minix/sysutil.h>
8433d6423SLionel Sambuc
alloc_contig(size_t len,int flags,phys_bytes * phys)9433d6423SLionel Sambuc void *alloc_contig(size_t len, int flags, phys_bytes *phys)
10433d6423SLionel Sambuc {
11*5c8eb53dSCristiano Giuffrida void* buf;
12433d6423SLionel Sambuc int mmapflags = MAP_PREALLOC|MAP_CONTIG|MAP_ANON;
13433d6423SLionel Sambuc
14433d6423SLionel Sambuc if(flags & AC_LOWER16M)
15433d6423SLionel Sambuc mmapflags |= MAP_LOWER16M;
16433d6423SLionel Sambuc if(flags & AC_LOWER1M)
17433d6423SLionel Sambuc mmapflags |= MAP_LOWER1M;
18433d6423SLionel Sambuc if(flags & AC_ALIGN64K)
19433d6423SLionel Sambuc mmapflags |= MAP_ALIGNMENT_64KB;
20433d6423SLionel Sambuc
21433d6423SLionel Sambuc /* First try to get memory with mmap. This is guaranteed
22433d6423SLionel Sambuc * to be page-aligned, and we can tell VM it has to be
23433d6423SLionel Sambuc * pre-allocated and contiguous.
24433d6423SLionel Sambuc */
25433d6423SLionel Sambuc errno = 0;
26*5c8eb53dSCristiano Giuffrida buf = sef_llvm_ac_mmap(0, len, PROT_READ|PROT_WRITE, mmapflags, -1, 0);
27*5c8eb53dSCristiano Giuffrida if(buf == MAP_FAILED) {
28433d6423SLionel Sambuc return NULL;
29433d6423SLionel Sambuc }
30433d6423SLionel Sambuc
31433d6423SLionel Sambuc /* Get physical address, if requested. */
32*5c8eb53dSCristiano Giuffrida if(phys != NULL && sys_umap(SELF, VM_D, (vir_bytes)buf, len,
33*5c8eb53dSCristiano Giuffrida phys) != OK)
34433d6423SLionel Sambuc panic("sys_umap_data_fb failed");
35433d6423SLionel Sambuc
36*5c8eb53dSCristiano Giuffrida return buf;
37433d6423SLionel Sambuc }
38433d6423SLionel Sambuc
free_contig(void * addr,size_t len)39433d6423SLionel Sambuc int free_contig(void *addr, size_t len)
40433d6423SLionel Sambuc {
41*5c8eb53dSCristiano Giuffrida return sef_llvm_ac_munmap(addr, len);
42433d6423SLionel Sambuc }
43433d6423SLionel Sambuc
44