/*
* Copyright (c) 2013 Jan Vesely
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup drvusbehci
* @{
*/
/** @file
* @brief EHCI driver
*/
#ifndef DRV_EHCI_UTILS_MALLOC32_H
#define DRV_EHCI_UTILS_MALLOC32_H
#include <align.h>
#include <as.h>
#include <ddi.h>
#include <errno.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdint.h>
/*
* Generic TDs and EDs require 16byte alignment,
* Isochronous TD require 32byte alignment,
* buffers do not have to be aligned.
*/
#define EHCI_ALIGN 32
#define EHCI_REQUIRED_PAGE_SIZE 4096
/** Get physical address translation
*
* @param[in] addr Virtual address to translate
* @return Physical address if exists, NULL otherwise.
*/
static inline uintptr_t addr_to_phys(const void *addr)
{
uintptr_t result;
errno_t ret = as_get_physical_mapping(addr, &result);
if (ret != EOK)
return 0;
return result;
}
/** Physical mallocator simulator
*
* @param[in] size Size of the required memory space
* @return Address of the aligned and big enough memory place, NULL on failure.
*/
static inline void *malloc32(size_t size)
{
uintptr_t phys;
void *address = AS_AREA_ANY;
size_t real_size = ALIGN_UP(size, PAGE_SIZE);
const errno_t ret = dmamem_map_anonymous(real_size,
DMAMEM_4GiB, AS_AREA_READ | AS_AREA_WRITE, 0, &phys,
&address);
if (ret == EOK) {
/*
* Poison, accessing it should be enough to make sure
* the location is mapped, but poison works better
*/
memset(address, 0x5, real_size);
return address;
}
return NULL;
}
/** Physical mallocator simulator
*
* @param[in] addr Address of the place allocated by malloc32
*/
static inline void free32(void *addr)
{
dmamem_unmap_anonymous(addr);
}
/** Create 4KB page mapping
*
* @return Address of the mapped page, NULL on failure.
*/
static inline void *get_page()
{
return malloc32(PAGE_SIZE);
}
static inline void return_page(void *page)
{
free32(page);
}
#endif
/**
* @}
*/