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/**
* @file usb_mem.h
* @brief
*
* Copyright (c) 2022 sakumisu
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
*/
#ifndef _USB_MEM_H
#define _USB_MEM_H
#ifndef CONFIG_DCACHE_LINE_SIZE
#define CONFIG_DCACHE_LINE_SIZE 32
#endif
#ifdef CONFIG_USB_DCACHE_ENABLE
#define USB_NOCACHE_RAM_SECTION __attribute__((section(".nocache_ram")))
#define USB_MEM_ALIGN32 __attribute__((aligned(CONFIG_DCACHE_LINE_SIZE)))
#else
#define USB_NOCACHE_RAM_SECTION
#define USB_MEM_ALIGN32
#endif
#define usb_malloc(size) malloc(size)
#define usb_free(ptr) free(ptr)
#ifdef CONFIG_USB_DCACHE_ENABLE
static inline void *usb_iomalloc(size_t size)
{
void *ptr;
void *align_ptr;
int uintptr_size;
size_t align_size;
uint32_t align = CONFIG_DCACHE_LINE_SIZE;
/* sizeof pointer */
uintptr_size = sizeof(void *);
uintptr_size -= 1;
/* align the alignment size to uintptr size byte */
align = ((align + uintptr_size) & ~uintptr_size);
/* get total aligned size */
align_size = ((size + uintptr_size) & ~uintptr_size) + align;
/* allocate memory block from heap */
ptr = usb_malloc(align_size);
if (ptr != NULL) {
/* the allocated memory block is aligned */
if (((unsigned long)ptr & (align - 1)) == 0) {
align_ptr = (void *)((unsigned long)ptr + align);
} else {
align_ptr = (void *)(((unsigned long)ptr + (align - 1)) & ~(align - 1));
}
/* set the pointer before alignment pointer to the real pointer */
*((unsigned long *)((unsigned long)align_ptr - sizeof(void *))) = (unsigned long)ptr;
ptr = align_ptr;
}
return ptr;
}
static inline void usb_iofree(void *ptr)
{
void *real_ptr;
real_ptr = (void *)*(unsigned long *)((unsigned long)ptr - sizeof(void *));
usb_free(real_ptr);
}
#else
#define usb_iomalloc(size) usb_malloc(size)
#define usb_iofree(ptr) usb_free(ptr)
#endif
#endif
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