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mmap: support device mapping (in progress) refs #218

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NAKAMURA Gou
2014-09-17 18:35:30 +09:00
parent 438c7fd784
commit c9f8bb0201
2 changed files with 38 additions and 0 deletions
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26
kernel/syscall.c
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@ -812,6 +812,32 @@ SYSCALL_DECLARE(mmap)
if (!(flags & MAP_ANONYMOUS)) {
off = off0;
error = fileobj_create(fd, &memobj, &maxprot);
#ifdef ATTACHED_MIC
/*
* XXX: refuse device mapping in attached-mic now:
*
* In attached-mic, ihk_mc_map_memory() cannot convert into a local
* physical address a remote physical address which point KNC's memory.
* It seems that ihk_mc_map_memory() needs to set up SMPT.
*/
if (error == -ESRCH) {
error = -ENODEV;
}
#endif
if (error == -ESRCH) {
kprintf("sys_mmap:hit non VREG\n");
/*
* XXX: temporary:
*
* device mappings are uncachable
* until memory type setting codes are implemented.
*/
if (1) {
vrflags &= ~VR_MEMTYPE_MASK;
vrflags |= VR_MEMTYPE_UC;
}
error = devobj_create(fd, len, off, &memobj, &maxprot);
}
if (error) {
ekprintf("sys_mmap:fileobj_create failed. %d\n", error);
goto out;