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Virtual memory layout on Codezero/ARMv5:
========================================



0xFFFF FFFF     .---------------. End of virtual memory
                | Syscall page  |
0xFFFF F000     |---------------|
                |   Reserved    |
0xFFFF 1000     |---------------|
                |  Vector page  |
0xFFFF 0000     |---------------|
                |   Reserved    |
0xF900 0000     |---------------| UTCB area ends
                |               |
                |      ...      |
                |   ---------   |
                |   UTCB page   |
                |   ---------   |
                |   UTCB page   |
0xF800 0000     |---------------| UTCB area starts
                |               |
                |   Codezero    |
                |  Microkernel  |
                |               |
0xF000 0000     |---------------|
                |               |
                |   MM0 pager   |
                |               |
0xE000 0000     |---------------|
                |               |
                |               |
                |   Reserved    |
                |               |
                |               |
                | ...           |
0x2000 0000     |---------------| User task area ends
                |               |
                |               |
                |               |
                |     Task      |
                | Address Space |
                |               |
                |               |
0x1000 0000     |---------------| User task area starts
                |               |
                |               |
                |   Reserved    |
                |               |
                |               |
0x0             '---------------' Start of virtual memory




User task address space layout on Codezero/ARMv5:
=================================================

0xF8xx x000     .---------------.
                |  Task's UTCB  |
0xF8xx x000     '---------------'


0x2000 0000     .---------------. End of user task address space
                |4KB Environment|
0x1FFF F000     |---------------|
                |  16KB Stack   |
                |       |       |
                |       v       |
                |               |
0x1FFE F000     |---------------|
                |               |
                |    Memory     |
                |   available   |
                |   for mmap()  |
                |               |
0x1xxx x000     |---------------|
                |     BSS       |
                |---------------|
                |     Data      |
                |---------------|
                |     Text      |
0x1000 0000     '---------------' Start of user task address space