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-rw-r--r--devio/dev.c227
1 files changed, 0 insertions, 227 deletions
diff --git a/devio/dev.c b/devio/dev.c
deleted file mode 100644
index 4d3b89cb..00000000
--- a/devio/dev.c
+++ /dev/null
@@ -1,227 +0,0 @@
-/* Mach devices.
-
- Copyright (C) 1995 Free Software Foundation, Inc.
-
- Written by Miles Bader <miles@gnu.ai.mit.edu>
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2, or (at
- your option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include <hurd.h>
-#include <device/device.h>
-#include <assert.h>
-#include <hurd/pager.h>
-
-#include "dev.h"
-#include "iostate.h"
-
-/* ---------------------------------------------------------------- */
-
-/* Returns a pointer to a new device structure in DEV for the kernel device
- NAME, with the given FLAGS. If BLOCK_SIZE is non-zero, it should be the
- desired block size, and must be a multiple of the device block size.
- If an error occurs, the error code is returned, otherwise 0. */
-error_t
-dev_open(char *name, int flags, int block_size, struct dev **dev)
-{
- error_t err = 0;
- static mach_port_t device_master = MACH_PORT_NULL;
-
- *dev = malloc(sizeof (struct dev));
-
- if (!(flags & DEV_SERIAL))
- flags |= DEV_SEEKABLE;
-
- if (*dev == NULL)
- return ENOMEM;
-
- (*dev)->name = malloc (strlen (name) + 1);
- if ((*dev)->name)
- strcpy ((*dev)->name, name);
- else
- err = ENOMEM;
-
- (*dev)->port = MACH_PORT_NULL;
-
- if (!err && device_master == MACH_PORT_NULL)
- err = get_privileged_ports(NULL, &device_master);
-
- if (!err)
- err = device_open(device_master,
- D_READ | (flags & DEV_READONLY ? D_WRITE : 0),
- name, &(*dev)->port);
-
- if (!err)
- {
- int count = DEV_GET_SIZE_COUNT;
- int sizes[DEV_GET_SIZE_COUNT];
-
- /* Get info about the device: total size (in bytes) and block size (in
- bytes). Block size is unit in which device addressing is done. */
- err = device_get_status((*dev)->port, DEV_GET_SIZE, sizes, &count);
- if (!err)
- {
- (*dev)->size = sizes[DEV_GET_SIZE_DEVICE_SIZE];
- (*dev)->dev_block_size = sizes[DEV_GET_SIZE_RECORD_SIZE];
- }
- }
-
- if (!err)
- {
- if (block_size > 0)
- if (block_size > (*dev)->dev_block_size
- && block_size % (*dev)->dev_block_size == 0)
- (*dev)->block_size = block_size;
- else
- err = EINVAL;
- else
- (*dev)->block_size = (*dev)->dev_block_size;
-
- if ((*dev)->dev_block_size == 1)
- flags |= DEV_SERIAL;
-
- (*dev)->flags = flags;
- (*dev)->owner = 0;
- }
-
- if (!err)
- err = io_state_init(&(*dev)->io_state, *dev);
-
- if (err)
- {
- if ((*dev)->port != MACH_PORT_NULL)
- mach_port_deallocate(mach_task_self(), (*dev)->port);
- free(*dev);
- }
-
- return err;
-}
-
-/* Free DEV and any resources it consumes. */
-void
-dev_close(struct dev *dev)
-{
- if (!dev_is(dev, DEV_READONLY))
- {
- if (dev->pager != NULL)
- pager_shutdown(dev->pager);
- io_state_sync(&dev->io_state, dev);
- }
-
- device_close(dev->port);
- io_state_finalize(&dev->io_state);
-
- free(dev);
-}
-
-/* ---------------------------------------------------------------- */
-
-/* Try and write out any pending writes to DEV. If WAIT is true, will wait
- for any paging activity to cease. */
-error_t
-dev_sync(struct dev *dev, int wait)
-{
- error_t err = 0;
-
- if (!dev_is(dev, DEV_READONLY))
- {
- struct io_state *ios = &dev->io_state;
-
- io_state_lock(ios);
-
- /* Sync any paged backing store. */
- if (dev->pager != NULL)
- pager_sync(dev->pager, wait);
-
- /* Write out any stuff buffered in our io_state. */
- err = io_state_sync(ios, dev);
-
- io_state_unlock(ios);
- }
-
- return err;
-}
-
-/* ---------------------------------------------------------------- */
-
-/* Writes AMOUNT bytes from the buffer pointed to by BUF to the device DEV.
- *OFFS is incremented to reflect the amount read/written. Both AMOUNT and
- *OFFS must be multiples of DEV's block size, and either BUF must be
- page-aligned, or dev_write_valid() must return true for these arguments.
- If an error occurs, the error code is returned, otherwise 0. */
-error_t
-dev_write(struct dev *dev,
- vm_address_t buf, vm_size_t amount, vm_offset_t *offs)
-{
- int bsize = dev->dev_block_size;
- vm_offset_t written = 0;
- vm_offset_t block = (bsize == 1 ? *offs : *offs / bsize);
- error_t err;
-
- assert(dev_write_valid(dev, buf, amount, *offs));
- assert(*offs % bsize == 0);
- assert(amount % bsize == 0);
-
- if (amount < IO_INBAND_MAX)
- err =
- device_write_inband (dev->port, 0, block,
- (io_buf_ptr_t)buf, amount, &written);
- else
- err =
- device_write (dev->port, 0, block, (io_buf_ptr_t)buf, amount, &written);
-
- if (!err)
- *offs += written;
-
- return err;
-}
-
-/* Reads AMOUNT bytes from DEV and returns it in BUF and BUF_LEN (using the
- standard mach out-array convention). *OFFS is incremented to reflect the
- amount read/written. Both LEN and *OFFS must be multiples of DEV's block
- size. If an error occurs, the error code is returned, otherwise 0. */
-error_t
-dev_read(struct dev *dev,
- vm_address_t *buf, vm_size_t *buf_len, vm_size_t amount,
- vm_offset_t *offs)
-{
- error_t err = 0;
- int bsize = dev->dev_block_size;
- vm_offset_t read = 0;
- vm_offset_t block = (bsize == 1 ? *offs : *offs / bsize);
-
- assert(*offs % bsize == 0);
- assert(amount % bsize == 0);
-
- if (amount < IO_INBAND_MAX)
- {
- if (*buf_len < amount)
- err = vm_allocate(mach_task_self(), buf, amount, 1);
- if (!err)
- err =
- device_read_inband(dev->port, 0, block,
- amount, (io_buf_ptr_t)*buf, &read);
- }
- else
- err =
- device_read(dev->port, 0, block, amount, (io_buf_ptr_t *)buf, &read);
-
- if (!err)
- {
- *offs += read;
- *buf_len = read;
- }
-
- return err;
-}
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