为指针分配内存地址

我试图给一个指针分配一个内存地址,但无法编译它。 地址是一个内存映射的硬件寄存器。

#include <memory>

template<void* Address>
struct ClassAImpl {
    uint64_t* Register = reinterpret_cast<uint64_t*>(Address);
};

uint8_t arrA[10] = { 1, 2, 3, 4 };
using ClassA1 = ClassAImpl<(void*)&arrA>;       // error: the address of the 'void' subobject of 'arrA' is not a valid template argument
using ClassA2 = ClassAImpl<0x8767876787678767>; // error: could not convert template argument '9756915996444559207' from 'long unsigned int' to 'void*'


template<uint64_t Address>
struct ClassBImpl {
    uint64_t* Register = reinterpret_cast<uint64_t*>(Address);
};

uint8_t arrB[10] = { 1, 2, 3, 4 };
using ClassB1 = ClassBImpl<(void*)&arrB>;       // error: conversion from 'void*' to 'long unsigned int' in a converted constant expression       
using ClassB2 = ClassBImpl<0x8767876787678767>; // This compiles.

我想让a1类从指向缓冲区的指针,而a2类从一个固定地址。

我用GCC 8.2编译C++