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| Rev | Author | Line No. | Line |
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| 1180 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
| 1180 | jermar | 3 | * All rights reserved. |
| 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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| 1653 | cejka | 27 | */ |
| 28 | |||
| 1719 | decky | 29 | /** @addtogroup libc |
| 1653 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 1180 | jermar | 33 | */ |
| 34 | |||
| 35 | #include <ddi.h> |
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| 36 | #include <libc.h> |
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| 37 | #include <task.h> |
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| 4344 | svoboda | 38 | #include <as.h> |
| 39 | #include <align.h> |
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| 40 | #include <libarch/config.h> |
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| 1180 | jermar | 41 | #include <kernel/ddi/ddi_arg.h> |
| 42 | |||
| 43 | /** Map piece of physical memory to task. |
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| 44 | * |
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| 45 | * Caller of this function must have the CAP_MEM_MANAGER capability. |
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| 46 | * |
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| 4344 | svoboda | 47 | * @param pf Physical address of the starting frame. |
| 48 | * @param vp Virtual address of the starting page. |
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| 49 | * @param pages Number of pages to map. |
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| 50 | * @param flags Flags for the new address space area. |
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| 1180 | jermar | 51 | * |
| 4344 | svoboda | 52 | * @return 0 on success, EPERM if the caller lacks the |
| 53 | * CAP_MEM_MANAGER capability, ENOENT if there is no task |
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| 54 | * with specified ID and ENOMEM if there was some problem |
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| 55 | * in creating address space area. |
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| 1180 | jermar | 56 | */ |
| 2012 | jermar | 57 | int physmem_map(void *pf, void *vp, unsigned long pages, int flags) |
| 1180 | jermar | 58 | { |
| 4344 | svoboda | 59 | return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp, pages, |
| 60 | flags); |
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| 1180 | jermar | 61 | } |
| 1192 | jermar | 62 | |
| 63 | /** Enable I/O space range to task. |
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| 64 | * |
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| 65 | * Caller of this function must have the IO_MEM_MANAGER capability. |
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| 66 | * |
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| 4344 | svoboda | 67 | * @param id Task ID. |
| 68 | * @param ioaddr Starting address of the I/O range. |
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| 69 | * @param size Size of the range. |
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| 1192 | jermar | 70 | * |
| 4344 | svoboda | 71 | * @return 0 on success, EPERM if the caller lacks the |
| 72 | * CAP_IO_MANAGER capability, ENOENT if there is no task |
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| 73 | * with specified ID and ENOMEM if there was some problem |
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| 74 | * in allocating memory. |
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| 1192 | jermar | 75 | */ |
| 1254 | jermar | 76 | int iospace_enable(task_id_t id, void *ioaddr, unsigned long size) |
| 1192 | jermar | 77 | { |
| 78 | ddi_ioarg_t arg; |
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| 79 | |||
| 80 | arg.task_id = id; |
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| 81 | arg.ioaddr = ioaddr; |
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| 82 | arg.size = size; |
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| 83 | |||
| 1254 | jermar | 84 | return __SYSCALL1(SYS_IOSPACE_ENABLE, (sysarg_t) &arg); |
| 1192 | jermar | 85 | } |
| 1213 | palkovsky | 86 | |
| 87 | /** Interrupt control |
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| 88 | * |
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| 4344 | svoboda | 89 | * @param enable 1 - enable interrupts, 0 - disable interrupts |
| 1213 | palkovsky | 90 | */ |
| 1279 | palkovsky | 91 | int preemption_control(int enable) |
| 1213 | palkovsky | 92 | { |
| 1279 | palkovsky | 93 | return __SYSCALL1(SYS_PREEMPT_CONTROL, (sysarg_t) enable); |
| 1213 | palkovsky | 94 | } |
| 1653 | cejka | 95 | |
| 4344 | svoboda | 96 | /** Enable PIO for specified I/O range. |
| 97 | * |
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| 98 | * @param pio_addr I/O start address. |
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| 99 | * @param size Size of the I/O region. |
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| 100 | * @param use_addr Address where the final address for application's PIO |
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| 101 | * will be stored. |
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| 102 | * |
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| 103 | * @return Zero on success or negative error code. |
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| 104 | */ |
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| 105 | int pio_enable(void *pio_addr, size_t size, void **use_addr) |
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| 106 | { |
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| 107 | void *phys; |
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| 108 | void *virt; |
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| 109 | size_t offset; |
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| 110 | unsigned int pages; |
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| 111 | |||
| 112 | #ifdef IO_SPACE_BOUNDARY |
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| 113 | if (pio_addr < IO_SPACE_BOUNDARY) { |
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| 114 | *use_addr = pio_addr; |
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| 115 | return iospace_enable(task_get_id(), pio_addr, size); |
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| 116 | } |
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| 117 | #endif |
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| 118 | |||
| 119 | phys = ALIGN_DOWN((uintptr_t) pio_addr, PAGE_SIZE); |
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| 120 | offset = pio_addr - phys; |
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| 121 | pages = ALIGN_UP(offset + size, PAGE_SIZE) >> PAGE_WIDTH; |
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| 122 | virt = as_get_mappable_page(pages); |
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| 123 | *use_addr = virt + offset; |
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| 124 | return physmem_map(phys, virt, pages, AS_AREA_READ | AS_AREA_WRITE); |
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| 125 | } |
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| 126 | |||
| 1719 | decky | 127 | /** @} |
| 1653 | cejka | 128 | */ |