RTEMS virtual address to physical address on i386

[Eric Valette]

Daron Chabot wrote:

> On the 386 BSP, all addresses are physical. Kernel and user applications 
> run at the same privilege level (i.e. 0).

That is simply not true. We use the VM to be able to clear caching on 
PCI hardware registers for memory mapped hardware. Without this, caching 
is on or off for all acessible address space which is simply not tenable.

BUT the mapping is virtual address = physical address


> And no, there is no DMA API like linux's pci_alloc_consistent().

malloc is OK.

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