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