diff options
| author | Vijay Kumar Banerjee <vijaykumar9597@gmail.com> | 2019-07-18 14:26:26 +0530 |
|---|---|---|
| committer | Christian Mauderer <oss@c-mauderer.de> | 2019-07-27 13:49:07 +0200 |
| commit | b68ca55c964cac5a6940e27f2880ee740cb1618a (patch) | |
| tree | b2611e6b76b74b788be08eddf90baf830b8b0e17 /rtemsbsd | |
| parent | EPOCH(9): Add epoch_drain_callbacks() (diff) | |
| download | rtems-libbsd-b68ca55c964cac5a6940e27f2880ee740cb1618a.tar.bz2 | |
Add mmap
Diffstat (limited to 'rtemsbsd')
| -rw-r--r-- | rtemsbsd/include/machine/vm.h | 2 | ||||
| -rw-r--r-- | rtemsbsd/sys/fs/devfs/devfs_devs.c | 38 |
2 files changed, 40 insertions, 0 deletions
diff --git a/rtemsbsd/include/machine/vm.h b/rtemsbsd/include/machine/vm.h index e69de29b..351b7472 100644 --- a/rtemsbsd/include/machine/vm.h +++ b/rtemsbsd/include/machine/vm.h @@ -0,0 +1,2 @@ +#define VM_MEMATTR_DEFAULT 0 +#define VM_MEMATTR_UNCACHEABLE 1 diff --git a/rtemsbsd/sys/fs/devfs/devfs_devs.c b/rtemsbsd/sys/fs/devfs/devfs_devs.c index 7c697b0a..7b09e530 100644 --- a/rtemsbsd/sys/fs/devfs/devfs_devs.c +++ b/rtemsbsd/sys/fs/devfs/devfs_devs.c @@ -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( |