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Add mmap

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This commit is contained in:
Vijay Kumar Banerjee
2019-07-18 14:26:26 +05:30
committed by Christian Mauderer
parent bc2ba9a9cd
commit b68ca55c96
7 changed files with 71 additions and 7 deletions
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2
rtemsbsd/include/machine/vm.h
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@@ -0,0 +1,2 @@
#define VM_MEMATTR_DEFAULT 0
#define VM_MEMATTR_UNCACHEABLE 1

38
rtemsbsd/sys/fs/devfs/devfs_devs.c
View File

@@ -387,6 +387,43 @@ devfs_imfs_kqfilter(rtems_libio_t *iop, struct knote *kn)
return error;
}
static int
devfs_imfs_mmap(rtems_libio_t *iop, void **addr, size_t len, int prot,
off_t off)
{
struct cdev *cdev = devfs_imfs_get_context_by_iop(iop);
struct file *fp = rtems_bsd_iop_to_fp(iop);
struct thread *td = rtems_bsd_get_curthread_or_null();
struct file *fpop;
struct cdevsw *dsw;
int error, ref;
if (td != 0) {
if (cdev == NULL) {
error = ENXIO;
goto err;
}
if (cdev->si_flags & SI_ALIAS) {
cdev = cdev->si_parent;
}
dsw = dev_refthread(cdev, &ref);
if (dsw == NULL) {
error = ENXIO;
goto err;
}
fpop = td->td_fpop;
curthread->td_fpop = fp;
error = dsw->d_mmap( cdev, off, (vm_paddr_t *) addr, prot, VM_MEMATTR_DEFAULT);
td->td_fpop = fpop;
dev_relthread(cdev, ref);
} else {
error = ENOMEM;
}
err:
return rtems_bsd_error_to_status_and_errno(error);
}
static const rtems_filesystem_file_handlers_r devfs_imfs_handlers = {
.open_h = devfs_imfs_open,
.close_h = devfs_imfs_close,
@@ -403,6 +440,7 @@ static const rtems_filesystem_file_handlers_r devfs_imfs_handlers = {
.kqfilter_h = devfs_imfs_kqfilter,
.readv_h = devfs_imfs_readv,
.writev_h = devfs_imfs_writev,
.mmap_h = devfs_imfs_mmap,
};
static const IMFS_node_control devfs_imfs_control = IMFS_GENERIC_INITIALIZER(