forked from Imagelibrary/rtems
0d776cd247
* rtems/powerpc/registers.h, rtems/score/ppc.h: Per PR213, add the following: - support for the MPC74000 (AKA G4); there is no AltiVec support yet, however. - the cache flushing assembly code uses hardware-flush on the G4. Also, a couple of hardcoded numerical values were replaced by more readable symbolic constants. - extended interrupt-disabled code section so enclose the entire cache flush/invalidate procedure (as recommended by the book). This is not (latency) critical as it is only used by init code but prevents possible corruption. - Trivial page table support as been added. (1:1 effective-virtual-physical address mapping which is only useful only on CPUs which feature hardware TLB replacement, e.g. >604. This allows for write-protecting memory regions, e.g. text/ro-data which makes catching corruptors a lot easier. It also frees one DBAT/IBAT and gives more flexibility for setting up address maps :-) - setdbat() allows changing BAT0 also (since the BSP may use a page table, BAT0 could be available...). - asm_setdbatX() violated the SVR ABI by using r20 as a scratch register; changed for r0 - according to the book, a context synchronizing instruction is necessary prior to and after changing a DBAT -> isync added
#
# $Id$
#
This is the top level of the RTEMS directory structure. The following
is a description of the files and directories in this directory:
Makefile.in
The top-level Make command file used to build the C implementation
of RTEMS. [RTEMS assumes the use of GNU make.]
README
This file.
REQUIRES
A list of the other tools which are assumed to be installed
before RTEMS is built.
SUPPORT
Information on third-party support for RTEMS.
build-tools
This directory contains the source for various utilities
needed to build RTEMS.
make
Make command files "included" from those in the source distribution.
[RTEMS assumes the use of GNU make.]
patches
This directory contains patches for this release of RTEMS.
src
This directory contains the source code for the C
implementation of RTEMS as well as the test suites, sample
applications, Board Support Packages, Device Drivers, and
support libraries.