| 1 | /*
|
|---|
| 2 | * Copyright (c) 2010 Jan Vesely
|
|---|
| 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 | /** @addtogroup drvusbuhci
|
|---|
| 29 | * @{
|
|---|
| 30 | */
|
|---|
| 31 | /** @file
|
|---|
| 32 | * @brief UHCI driver
|
|---|
| 33 | */
|
|---|
| 34 | #ifndef DRV_UHCI_UTILS_MALLOC32_H
|
|---|
| 35 | #define DRV_UHCI_UTILS_MALLOC32_H
|
|---|
| 36 |
|
|---|
| 37 | #include <assert.h>
|
|---|
| 38 | #include <errno.h>
|
|---|
| 39 | #include <malloc.h>
|
|---|
| 40 | #include <mem.h>
|
|---|
| 41 | #include <as.h>
|
|---|
| 42 |
|
|---|
| 43 | #define UHCI_STRCUTURES_ALIGNMENT 16
|
|---|
| 44 | #define UHCI_REQUIRED_PAGE_SIZE 4096
|
|---|
| 45 |
|
|---|
| 46 |
|
|---|
| 47 | /** Get physical address translation
|
|---|
| 48 | *
|
|---|
| 49 | * @param[in] addr Virtual address to translate
|
|---|
| 50 | * @return Physical address if exists, NULL otherwise.
|
|---|
| 51 | */
|
|---|
| 52 | static inline uintptr_t addr_to_phys(const void *addr)
|
|---|
| 53 | {
|
|---|
| 54 | if (addr == NULL)
|
|---|
| 55 | return 0;
|
|---|
| 56 |
|
|---|
| 57 | uintptr_t result;
|
|---|
| 58 | const int ret = as_get_physical_mapping(addr, &result);
|
|---|
| 59 | if (ret != EOK)
|
|---|
| 60 | return 0;
|
|---|
| 61 | return (result | ((uintptr_t)addr & 0xfff));
|
|---|
| 62 | }
|
|---|
| 63 | /*----------------------------------------------------------------------------*/
|
|---|
| 64 | /** DMA malloc simulator
|
|---|
| 65 | *
|
|---|
| 66 | * @param[in] size Size of the required memory space
|
|---|
| 67 | * @return Address of the aligned and big enough memory place, NULL on failure.
|
|---|
| 68 | */
|
|---|
| 69 | static inline void * malloc32(size_t size)
|
|---|
| 70 | {
|
|---|
| 71 | /* This works only when the host has less than 4GB of memory as
|
|---|
| 72 | * physical address needs to fit into 32 bits */
|
|---|
| 73 |
|
|---|
| 74 | /* If we need more than one page there is no guarantee that the
|
|---|
| 75 | * memory will be continuous */
|
|---|
| 76 | if (size > PAGE_SIZE)
|
|---|
| 77 | return NULL;
|
|---|
| 78 | /* Calculate alignment to make sure the block won't cross page
|
|---|
| 79 | * boundary */
|
|---|
| 80 | size_t alignment = UHCI_STRCUTURES_ALIGNMENT;
|
|---|
| 81 | while (alignment < size)
|
|---|
| 82 | alignment *= 2;
|
|---|
| 83 | return memalign(alignment, size);
|
|---|
| 84 | }
|
|---|
| 85 | /*----------------------------------------------------------------------------*/
|
|---|
| 86 | /** DMA malloc simulator
|
|---|
| 87 | *
|
|---|
| 88 | * @param[in] addr Address of the place allocated by malloc32
|
|---|
| 89 | */
|
|---|
| 90 | static inline void free32(void *addr)
|
|---|
| 91 | { free(addr); }
|
|---|
| 92 | /*----------------------------------------------------------------------------*/
|
|---|
| 93 | /** Create 4KB page mapping
|
|---|
| 94 | *
|
|---|
| 95 | * @return Address of the mapped page, NULL on failure.
|
|---|
| 96 | */
|
|---|
| 97 | static inline void * get_page(void)
|
|---|
| 98 | {
|
|---|
| 99 | void *free_address = as_get_mappable_page(UHCI_REQUIRED_PAGE_SIZE);
|
|---|
| 100 | if (free_address == 0)
|
|---|
| 101 | return NULL;
|
|---|
| 102 | void *address = as_area_create(free_address, UHCI_REQUIRED_PAGE_SIZE,
|
|---|
| 103 | AS_AREA_READ | AS_AREA_WRITE);
|
|---|
| 104 | if (address != free_address)
|
|---|
| 105 | return NULL;
|
|---|
| 106 | return address;
|
|---|
| 107 | }
|
|---|
| 108 | /*----------------------------------------------------------------------------*/
|
|---|
| 109 | static inline void return_page(void *page)
|
|---|
| 110 | {
|
|---|
| 111 | if (page)
|
|---|
| 112 | as_area_destroy(page);
|
|---|
| 113 | }
|
|---|
| 114 |
|
|---|
| 115 | #endif
|
|---|
| 116 | /**
|
|---|
| 117 | * @}
|
|---|
| 118 | */
|
|---|
