rt-thread-official/bsp/loongson/ls2kdev/drivers/pci/pci.c

21 lines
656 B
C

/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-12-28 lizhirui first version
*/
#include <rtthread.h>
#include <pci.h>
rt_uint64_t pci_get_device_map_addr(rt_uint64_t bus,rt_uint64_t device,rt_uint64_t function,rt_uint32_t index)
{
rt_uint64_t device_addr = 0xFE00000000 | (bus << 16) | ((device & 0x1f) << 11) | ((function & 0x07) << 8);
struct pci_header *p = (struct pci_header *)(0x9000000000000000UL | device_addr);
return 0x9000000000000000UL | ((rt_uint64_t)(p -> BaseAddressRegister[index] & 0xFFFFFFF0));
}