| 1 | /*
|
|---|
| 2 | * Copyright (c) 2006 Jakub Jermar
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup libc
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #include <ddi.h>
|
|---|
| 36 | #include <libarch/ddi.h>
|
|---|
| 37 | #include <libc.h>
|
|---|
| 38 | #include <task.h>
|
|---|
| 39 | #include <as.h>
|
|---|
| 40 | #include <align.h>
|
|---|
| 41 | #include <libarch/config.h>
|
|---|
| 42 | #include <kernel/ddi/ddi_arg.h>
|
|---|
| 43 |
|
|---|
| 44 | /** Return unique device number.
|
|---|
| 45 | *
|
|---|
| 46 | * @return New unique device number.
|
|---|
| 47 | *
|
|---|
| 48 | */
|
|---|
| 49 | int device_assign_devno(void)
|
|---|
| 50 | {
|
|---|
| 51 | return __SYSCALL0(SYS_DEVICE_ASSIGN_DEVNO);
|
|---|
| 52 | }
|
|---|
| 53 |
|
|---|
| 54 | /** Map piece of physical memory to task.
|
|---|
| 55 | *
|
|---|
| 56 | * Caller of this function must have the CAP_MEM_MANAGER capability.
|
|---|
| 57 | *
|
|---|
| 58 | * @param pf Physical address of the starting frame.
|
|---|
| 59 | * @param vp Virtual address of the starting page.
|
|---|
| 60 | * @param pages Number of pages to map.
|
|---|
| 61 | * @param flags Flags for the new address space area.
|
|---|
| 62 | *
|
|---|
| 63 | * @return 0 on success, EPERM if the caller lacks the
|
|---|
| 64 | * CAP_MEM_MANAGER capability, ENOENT if there is no task
|
|---|
| 65 | * with specified ID and ENOMEM if there was some problem
|
|---|
| 66 | * in creating address space area.
|
|---|
| 67 | */
|
|---|
| 68 | int physmem_map(void *pf, void *vp, unsigned long pages, int flags)
|
|---|
| 69 | {
|
|---|
| 70 | return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp, pages,
|
|---|
| 71 | flags);
|
|---|
| 72 | }
|
|---|
| 73 |
|
|---|
| 74 | /** Enable I/O space range to task.
|
|---|
| 75 | *
|
|---|
| 76 | * Caller of this function must have the IO_MEM_MANAGER capability.
|
|---|
| 77 | *
|
|---|
| 78 | * @param id Task ID.
|
|---|
| 79 | * @param ioaddr Starting address of the I/O range.
|
|---|
| 80 | * @param size Size of the range.
|
|---|
| 81 | *
|
|---|
| 82 | * @return 0 on success, EPERM if the caller lacks the
|
|---|
| 83 | * CAP_IO_MANAGER capability, ENOENT if there is no task
|
|---|
| 84 | * with specified ID and ENOMEM if there was some problem
|
|---|
| 85 | * in allocating memory.
|
|---|
| 86 | */
|
|---|
| 87 | int iospace_enable(task_id_t id, void *ioaddr, unsigned long size)
|
|---|
| 88 | {
|
|---|
| 89 | ddi_ioarg_t arg;
|
|---|
| 90 |
|
|---|
| 91 | arg.task_id = id;
|
|---|
| 92 | arg.ioaddr = ioaddr;
|
|---|
| 93 | arg.size = size;
|
|---|
| 94 |
|
|---|
| 95 | return __SYSCALL1(SYS_IOSPACE_ENABLE, (sysarg_t) &arg);
|
|---|
| 96 | }
|
|---|
| 97 |
|
|---|
| 98 | /** Enable PIO for specified I/O range.
|
|---|
| 99 | *
|
|---|
| 100 | * @param pio_addr I/O start address.
|
|---|
| 101 | * @param size Size of the I/O region.
|
|---|
| 102 | * @param use_addr Address where the final address for application's PIO
|
|---|
| 103 | * will be stored.
|
|---|
| 104 | *
|
|---|
| 105 | * @return Zero on success or negative error code.
|
|---|
| 106 | */
|
|---|
| 107 | int pio_enable(void *pio_addr, size_t size, void **use_addr)
|
|---|
| 108 | {
|
|---|
| 109 | void *phys;
|
|---|
| 110 | void *virt;
|
|---|
| 111 | size_t offset;
|
|---|
| 112 | unsigned int pages;
|
|---|
| 113 |
|
|---|
| 114 | #ifdef IO_SPACE_BOUNDARY
|
|---|
| 115 | if (pio_addr < IO_SPACE_BOUNDARY) {
|
|---|
| 116 | *use_addr = pio_addr;
|
|---|
| 117 | return iospace_enable(task_get_id(), pio_addr, size);
|
|---|
| 118 | }
|
|---|
| 119 | #endif
|
|---|
| 120 |
|
|---|
| 121 | phys = (void *) ALIGN_DOWN((uintptr_t) pio_addr, PAGE_SIZE);
|
|---|
| 122 | offset = pio_addr - phys;
|
|---|
| 123 | pages = ALIGN_UP(offset + size, PAGE_SIZE) >> PAGE_WIDTH;
|
|---|
| 124 | virt = as_get_mappable_page(pages << PAGE_WIDTH);
|
|---|
| 125 | *use_addr = virt + offset;
|
|---|
| 126 | return physmem_map(phys, virt, pages, AS_AREA_READ | AS_AREA_WRITE);
|
|---|
| 127 | }
|
|---|
| 128 |
|
|---|
| 129 | /** @}
|
|---|
| 130 | */
|
|---|
