path: root/c/src/lib/libbsp/powerpc/helas403/bsp_specs
diff options
authorJoel Sherrill <>1998-09-30 21:50:42 +0000
committerJoel Sherrill <>1998-09-30 21:50:42 +0000
commitbe4284d0f20bccba0b27e915fd196c7ebac86297 (patch)
tree46597a2c2cb3d74b3292093e5c2de43d00fa43fd /c/src/lib/libbsp/powerpc/helas403/bsp_specs
parentCorrected TYPO error in the file. (diff)
BSP submitted by Thomas Doerfler <>:
Finally I am through: I have found the last bugs that made RTEMS- 4.0-beta3 start on my ppc403 board from ROM. So now the '403 support is up to date again. Roughly I have added the following features: - support for the on-chip interrupt controller (in a separate module) - interrupt support for the console device - termios support for the console device ============================================== Since the BSP behaivour changed in some details (console no longer is polling, other memory layout etc) I have created a new BSP "helas403" rather than changing the "papyrus" BSP. The old "polled" console driver still sticks around in "console.c.polled" To get the BSP up and running, I had to create the new BSP files (derived from papyrus). Besides that, the following source areas have been changed: - c/src/lib/libcpu/powerpc/ppc403: changes to console driver, small changes to clock driver, new "ictrl" interrupt controller driver - c/src/exec/score/cpu/powerpc/ppc.h: some small changes (added ppc403 characteristics like a exception vector prefix register, some special register definitions). I am quite sure, they are compatible with the existing sources, although I did not check - c/src/exec/score/cpu/powerpc/cpu.c: There is one severe limitation in the exception entries: Due to the current code arrangement, the "branch absolute" to the ISR handler may only jump to the first 128MByte or the last 128MByte of the 4GByte address range. When the ppc403 is running out of ROM, the ROM functions are located in the last 128MByte (0xFFF00000 and up). These addresses were not handled correctly (sign reduced) in "install_raw_handler". The change I added should work on existing ppc BSPs aswell... - c/src/lib/libc/termios.c: During my tests, I added one change you sent me, so this patch will already be incorporated in the current source tree. There are some smaller changes, see the attached diff file. ========================================= Concerning the GNU toolchain: I tried several tool chains. Finally I almost succeeded with egcs-1.0.3a with patch egcs-1.0.3-rtems-diff-19980527 I had to add the following lines to the egcs files. Without them configure complaint that the cross compiler could not generate executable output. - additional lines needed in egcs distribution in file gcc/config/rs6000/rtems.h: +++ lines start #undef STARTFILE_DEFAULT_SPEC #define STARTFILE_DEFAULT_SPEC "ecrti.o%s" #undef ENDFILE_DEFAULT_SPEC #define ENDFILE_DEFAULT_SPEC "ecrtn.o%s" ++++ lines end As far as I have seen in the Changelog of egcs, you have recently sent two patches affecting the powerpc support, but they were added in the wrong order.... :-( egcs-19980628 with patch egcs-19980628-rtems-diff-19980707 does not work! I used binutils 2.9.1 with patch binutils-2.9.1-rtems-diff-19980515 (binutils 2.8.1 does not work, internal error in gas) and newlib-1.8.0 with patch newlib-1.8.0-rtems-diff-19980707 Finally I had to poke a line in the "bit" script, since, on my LINUX machine, the GNU make is only available as "make", not as "gmake"... For all the tools and newlib I selected configuration "powerpc- rtems". -------------------------------------------- IMD Ingenieurbuero fuer Microcomputertechnik Thomas Doerfler Herbststrasse 8 D-82178 Puchheim Germany email:
Diffstat (limited to 'c/src/lib/libbsp/powerpc/helas403/bsp_specs')
1 files changed, 23 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/helas403/bsp_specs b/c/src/lib/libbsp/powerpc/helas403/bsp_specs
new file mode 100644
index 0000000000..c08f0a293b
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/helas403/bsp_specs
@@ -0,0 +1,23 @@
+%rename cpp old_cpp
+%rename lib old_lib
+%rename endfile old_endfile
+%rename startfile old_startfile
+%rename link old_link
+%(old_cpp) %{qrtems: -D__embedded__} -Asystem(embedded)
+%{!qrtems: %(old_lib)} %{qrtems: ecrti%O%s --start-group \
+%{!qrtems_debug: -lrtemsall} %{qrtems_debug: -lrtemsall_g} \
+-lc -lgcc --end-group \
+%{!qnolinkcmds: -T linkcmds%s}}
+%{!qrtems: %(old_startfile)} %{qrtems: \
+%{!qrtems_debug: } \
+%{qrtems_debug: }}
+%{!qrtems: %(old_link)} %{qrtems: -dc -dp -u __vectors -u flash_entry -N }