/** @file | |
This file contains the definination for host controller memory management routines | |
Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#ifndef _EFI_EHCI_MEM_H_ | |
#define _EFI_EHCI_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 { | |
EFI_PCI_IO_PROTOCOL *PciIo; | |
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 EFI_PCI_IO_PROTOCOL *PciIo, | |
IN BOOLEAN Check4G, | |
IN UINT32 Which4G | |
); | |
/** | |
Release the memory management pool. | |
@param Pool The USB memory pool to free. | |
@return EFI_SUCCESS The memory pool is freed. | |
@return 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. | |
@return None. | |
**/ | |
VOID | |
UsbHcFreeMem ( | |
IN USBHC_MEM_POOL *Pool, | |
IN VOID *Mem, | |
IN UINTN Size | |
); | |
/** | |
Calculate the corresponding pci bus address according to the Mem parameter. | |
@param Pool The memory pool of the host controller. | |
@param Mem The pointer to host memory. | |
@param Size The size of the memory region. | |
@return the pci memory address | |
**/ | |
EFI_PHYSICAL_ADDRESS | |
UsbHcGetPciAddressForHostMem ( | |
IN USBHC_MEM_POOL *Pool, | |
IN VOID *Mem, | |
IN UINTN Size | |
); | |
#endif |