Where can I find documentation on FreeBSD 64 bit port

[BHALCHANDRA DESHPANDE]

Hi

Could you please point me to relevant documentation regarding

FreeBSD port? I would like to know things like

1)       64 bit programming model

2)       Map of virtual address space on 64 bit.

3)       How 32 bit binaries are supported etc.

4)       General guidelines for making a module (kernel or user level)

64 bit safe.

 

Thanks

Bhala