forked from len0rd/rockbox
Fork of rockbox tailored for ipod classic
8e07d68452
The JZ misc allows to enable and test SRAM.
The XBurst code uses the coprocessor interface to analyse the cpu. It also
provides a test platform for various features like EBASE and exceptions.
I was able to test and confirm that on jz4760b (thus xburst), EBASE works
(but top 2 bits are not controllable and always 01). The processor claims
to support vector interrupts but this is untested. The values in ConfigX
are not to be trusted blindly, clearly some are wrong. I tried to use the
JZ4780 Config7 "ebase gate" to change bit 30 of EBASE but it does not work,
which suggests that JZ480 uses a newer version of XBurst. Detailled log below:
> ./hwstub_shell -q -f lua/xburst.lua -e "XBURST.init()"
[...]
XBurst:
PRId: 0x2ed0024f
CPU: JZ4760(B)
Config: 0x80000483
Architecture Type: MIPS32
Architecture Level: Release 2 (or more)
MMU Type: Standard TLB
Config1: 0x3e63318a
MMU Size: 32
ICache
Sets per way: 128
Ways: 4
Line size: 32
DCache
Sets per way: 128
Ways: 4
Line size: 32
FPU: no
Config2: 0x80000000
Config3: 0x20
Vectored interrupt: yes
Config7: 0x0
> ./hwstub_shell -q -e 'require("jz/misc"); JZ.misc.enable_sram()' \
-f lua/xburst.lua -e "XBURST.test_ebase(0x80000000);XBURST.test_ebase(0xb32d0000)
[...]
Testing EBASE...
Disable BEV
SR value: 0x2000fc00
EBASE value: 0x80000000
Value after writing 0x80000000: 0x80000000
Value after writing 0x80040000: 0x80040000
Test result: EBase seems to work
Disable config7 gate: write 0x0 to Config7
Value after writing 0xfffff000: 0xbffff000
Enable config7 gate: write 0x80 to Config7
Value after writing 0xc0000000: 0x80000000
Config7 result: Config7 gate does not work
Exception test with EBASE at 0x80000000...
Writing instructions to memory
Old SR: 0x2000fc00
New SR: 0xfc00
EBASE: 80000000
Before: cafebabe
After: deadbeef
Exception result: Exception and EBASE are working
Testing EBASE...
Disable BEV
SR value: 0x2000fc00
EBASE value: 0x80000000
Value after writing 0x80000000: 0x80000000
Value after writing 0x80040000: 0x80040000
Test result: EBase seems to work
Disable config7 gate: write 0x0 to Config7
Value after writing 0xfffff000: 0xbffff000
Enable config7 gate: write 0x80 to Config7
Value after writing 0xc0000000: 0x80000000
Config7 result: Config7 gate does not work
Exception test with EBASE at 0xb32d0000...
Writing instructions to memory
Old SR: 0x2000fc00
New SR: 0xfc00
EBASE: b32d0000
Before: cafebabe
After: deadbeef
Exception result: Exception and EBASE are working
Change-Id: I894227981a141a8c14419b36ed9f519baf145ad1
|
||
|---|---|---|
| android | ||
| apps | ||
| backdrops | ||
| bootloader | ||
| debian | ||
| docs | ||
| firmware | ||
| flash | ||
| fonts | ||
| gdb | ||
| icons | ||
| lib | ||
| manual | ||
| packaging | ||
| rbutil | ||
| tools | ||
| uisimulator | ||
| utils | ||
| wps | ||
| .gitattributes | ||
| .gitignore | ||
__________ __ ___.
Open \______ \ ____ ____ | | _\_ |__ _______ ___
Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
\/ \/ \/ \/ \/
Build Your Own Rockbox
1. Clone 'rockbox' from git (or extract a downloaded archive).
$ git clone git://git.rockbox.org/rockbox
or
$ tar xjf rockbox.tar.bz2
2. Create a build directory, preferably in the same directory as the firmware/
and apps/ directories. This is where all generated files will be written.
$ cd rockbox
$ mkdir build
$ cd build
3. Make sure you have sh/arm/m68k-elf-gcc and siblings in the PATH. Make sure
that you have 'perl' in your PATH too. Your gcc cross compiler needs to be
a particular version depending on what player you are compiling for. These
can be acquired with the rockboxdev.sh script in the /tools/ folder of the
source, or will have been included if you've installed one of the
toolchains or development environments provided at http://www.rockbox.org/
$ which sh-elf-gcc
$ which perl
4. In your build directory, run the 'tools/configure' script and enter what
target you want to build for and if you want a debug version or not (and a
few more questions). It'll prompt you. The debug version is for making a
gdb version out of it. It is only useful if you run gdb towards your target
Archos.
$ ../tools/configure
5. *ploink*. Now you have got a Makefile generated for you.
6. Run 'make' and soon the necessary pieces from the firmware and the apps
directories have been compiled, linked and scrambled for you.
$ make
$ make zip
7. unzip the rockbox.zip on your music player, reboot it and
*smile*.
If you want to build for more than one target, just create several build
directories and create a setup for each target:
$ mkdir build-fmrecorder
$ cd build-fmrecorder
$ ../tools/configure
$ mkdir build-player
$ cd build-player
$ ../tools/configure
Questions anyone? Ask on the mailing list. We'll be happy to help you!