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/** @file
This file contains the definination for host controller memory
management routines.
Copyright (c) 2013-2015 Intel Corporation.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _USB_HC_MEM_H_
#define _USB_HC_MEM_H_
#define USB_HC_BIT(a) ((UINTN)(1 << (a)))
#define USB_HC_BIT_IS_SET(Data, Bit) \
((BOOLEAN)(((Data) & USB_HC_BIT(Bit)) == USB_HC_BIT(Bit)))
#define USB_HC_HIGH_32BIT(Addr64) \
((UINT32)(RShiftU64((UINTN)(Addr64), 32) & 0XFFFFFFFF))
typedef struct _USBHC_MEM_BLOCK USBHC_MEM_BLOCK;
struct _USBHC_MEM_BLOCK {
UINT8 *Bits; // Bit array to record which unit is allocated
UINTN BitsLen;
UINT8 *Buf;
UINT8 *BufHost;
UINTN BufLen; // Memory size in bytes
VOID *Mapping;
USBHC_MEM_BLOCK *Next;
};
//
// USBHC_MEM_POOL is used to manage the memory used by USB
// host controller. EHCI requires the control memory and transfer
// data to be on the same 4G memory.
//
typedef struct _USBHC_MEM_POOL {
BOOLEAN Check4G;
UINT32 Which4G;
USBHC_MEM_BLOCK *Head;
} USBHC_MEM_POOL;
//
// Memory allocation unit, must be 2^n, n>4
//
#define USBHC_MEM_UNIT 64
#define USBHC_MEM_UNIT_MASK (USBHC_MEM_UNIT - 1)
#define USBHC_MEM_DEFAULT_PAGES 16
#define USBHC_MEM_ROUND(Len) (((Len) + USBHC_MEM_UNIT_MASK) & (~USBHC_MEM_UNIT_MASK))
//
// Advance the byte and bit to the next bit, adjust byte accordingly.
//
#define NEXT_BIT(Byte, Bit) \
do { \
(Bit)++; \
if ((Bit) > 7) { \
(Byte)++; \
(Bit) = 0; \
} \
} while (0)
/**
Initialize the memory management pool for the host controller.
@param PciIo The PciIo that can be used to access the host controller.
@param Check4G Whether the host controller requires allocated memory
from one 4G address space.
@param Which4G The 4G memory area each memory allocated should be from.
@retval EFI_SUCCESS The memory pool is initialized.
@retval EFI_OUT_OF_RESOURCE Fail to init the memory pool.
**/
USBHC_MEM_POOL *
UsbHcInitMemPool (
IN BOOLEAN Check4G,
IN UINT32 Which4G
);
/**
Release the memory management pool.
@param Pool The USB memory pool to free.
@retval EFI_SUCCESS The memory pool is freed.
@retval EFI_DEVICE_ERROR Failed to free the memory pool.
**/
EFI_STATUS
UsbHcFreeMemPool (
IN USBHC_MEM_POOL *Pool
);
/**
Allocate some memory from the host controller's memory pool
which can be used to communicate with host controller.
@param Pool The host controller's memory pool.
@param Size Size of the memory to allocate.
@return The allocated memory or NULL.
**/
VOID *
UsbHcAllocateMem (
IN USBHC_MEM_POOL *Pool,
IN UINTN Size
);
/**
Free the allocated memory back to the memory pool.
@param Pool The memory pool of the host controller.
@param Mem The memory to free.
@param Size The size of the memory to free.
**/
VOID
UsbHcFreeMem (
IN USBHC_MEM_POOL *Pool,
IN VOID *Mem,
IN UINTN Size
);
#endif
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