Address Conversion
[Memory Management]

Linux' __va()/__pa() macro replacements. More...

Functions
void *	__va (volatile unsigned long paddr)
	Convert physical to virtual memory address.
unsigned long	__pa (volatile void *vaddr)
	Convert virtual to physical memory address.

---

Detailed Description

Linux' __va()/__pa() macro replacements.

We look in our local table(s) to save IPC costs. If this fails nasty things are going on and we Panic.

The current implementation is slow, iteration based. Optimization is possible and should be done soon using a hashing-like scheme.

Another straight-forward solution was mentioned by Jork: configure only one big kmem region and save traversing a list. This can be done be setting KMEM_RSIZE.

Todo:

error handling

Todo:

what about I/O pages?

Todo:

implement remove_region()

Todo:

introduce region names

Test:

krishna: Ouch, if "struct conv_region" is vmalloc'ed, we may get a pfault on address conversion - that IS slow.

---

Function Documentation

unsigned long __pa

(

volatile void *

vaddr

)

Convert virtual to physical memory address.

Parameters:

vaddr

virtual memory address

Returns:

physical address

Definition at line 117 of file address.c.

void* __va

(

volatile unsigned long

paddr

)

Convert physical to virtual memory address.

Parameters:

paddr

physical memory address

Returns:

virtual address

Definition at line 86 of file address.c.