mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
Documenting the LX port.
I am documenting, step by step, the LX port on v3. Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@336 f3766cd6-281f-0410-b1cd-43a5c92072e9
This commit is contained in:
Ronald G. Minnich
parent
db83d17b19
commit
6015ba232a
1 changed files with 202 additions and 1 deletions
|
|
@ -1,4 +1,4 @@
|
|||
#LyX 1.4.2 created this file. For more info see http://www.lyx.org/
|
||||
#LyX 1.4.4 created this file. For more info see http://www.lyx.org/
|
||||
\lyxformat 245
|
||||
\begin_document
|
||||
\begin_header
|
||||
|
|
@ -1921,5 +1921,206 @@ on code.
|
|||
;)
|
||||
\end_layout
|
||||
|
||||
\begin_layout Section
|
||||
Case study: new port
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
This is a case study of installing the amd norwich board into V3.
|
||||
For each commit, I'll record what we did.
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Subsection
|
||||
319
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: mainboard/Kconfig -- had to modify this to include the amd directory
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: mainboard/amd/Kconfig -- had to add and modify this for the norwich
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: mainboard/amd/norwich/Kconfig -- created by modifying the qemu target.
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Subsection
|
||||
320
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: southbridge/Kconfig -- had to modify this to include the amd options
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: southbridge/amd/Kconfig -- had to modify this to include the cs5536
|
||||
options
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: southbridge/amd/cs5536/Makefile -- created by modifying the Intel
|
||||
piix4 target.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: southbridge/amd/Makefile -- had to modify this to include the amd
|
||||
directory
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: southbridge/Makefile-- had to add and modify this for the cs5536
|
||||
\end_layout
|
||||
|
||||
\begin_layout Subsection
|
||||
321
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: northbridge/Kconfig -- had to modify this to include the amd options
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: northbridge/amd/Kconfig -- had to modify this to include the cs5536
|
||||
options
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: northbridge/amd/geodelx/Makefile -- created from scratch -- we're
|
||||
getting the hang of this
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: northbridge/amd/Makefile -- had to modify this to include the geodelx
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: northbridge/Makefile -- had to add and modify this for adding amd
|
||||
\end_layout
|
||||
|
||||
\begin_layout Subsection
|
||||
322
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
We had some errors and made some changes for building.
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: mainboard/amd/Kconfig
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Index: mainboard/amd/norwich/Makefile
|
||||
\end_layout
|
||||
|
||||
\begin_layout Subsection
|
||||
R323
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
The real work begins.
|
||||
To this point it has been more directory structure and Kconfig.
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Create the file arch/x86/amd_geode_lx.h.
|
||||
This file contains definitions for the chip.
|
||||
This is from V2, and had a few mods for V3 conventions.
|
||||
Also, there were complaints about spacing etc.
|
||||
and these got fixed.
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Create the file arch/x86/stage0_amd_geodelx.S.
|
||||
This contains the CAR code for the CPU.
|
||||
We took the qemu target and pulled out the
|
||||
\begin_inset Quotes eld
|
||||
\end_inset
|
||||
|
||||
CAR
|
||||
\begin_inset Quotes erd
|
||||
\end_inset
|
||||
|
||||
part and pulled in the v2 car code for the LX.
|
||||
The CAR part really gets sandwiched in between startup stuff at the beginning
|
||||
of the file and the jmp vector at the end.
|
||||
It begins at the DCacheSetup label and ends before the leave_DCacheSetup
|
||||
label.
|
||||
This builds.
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
Next we bring in the initram.c from v2.
|
||||
This is LinuxBIOSv2/src/mainboard/amd/norwich/cache_as_ram_auto.c.
|
||||
It will not build in V3, as the includes are wrong.
|
||||
We fix these and, while we are at it, change the entry point to be called
|
||||
main().
|
||||
This file will be a standalone file in the LinuxBIOS Archive (LAR), and
|
||||
hence needs to have main() as the entry point.
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
We pretty much get a ton of errors once include is fixed.
|
||||
Why? Because the old code was started from romcc, and included lots of
|
||||
.c files, since that is how romcc worked.
|
||||
The new code is going to be linked.
|
||||
We took all the .c includes out, so now we get this:
|
||||
\end_layout
|
||||
|
||||
\begin_layout LyX-Code
|
||||
/home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c: In function
|
||||
'spd_read_byte': /home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/init
|
||||
ram.c:30: error: implicit declaration of function 'smbus_read_byte' /home/rminnic
|
||||
h/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c: In function 'msr_init':
|
||||
/home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c:41:
|
||||
error: 'msr_t' undeclared (first use in this function) /home/rminnich/src/bios/
|
||||
LinuxBIOSv3/mainboard/amd/norwich/initram.c:41: error: (Each undeclared identifie
|
||||
r is reported only once /home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwic
|
||||
h/initram.c:41: error: for each function it appears in.) /home/rminnich/src/bios/L
|
||||
inuxBIOSv3/mainboard/amd/norwich/initram.c:41: error: expected ';' before
|
||||
'msr' /home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c:43:
|
||||
error: 'msr' undeclared (first use in this function) /home/rminnich/src/bios/Li
|
||||
nuxBIOSv3/mainboard/amd/norwich/initram.c:45: error: implicit declaration
|
||||
of function 'wrmsr' /home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/i
|
||||
nitram.c: In function 'main': /home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/n
|
||||
orwich/initram.c:79: error: implicit declaration of function 'POST_CODE'
|
||||
/home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c:81:
|
||||
error: array type has incomplete element type /home/rminnich/src/bios/LinuxBIOS
|
||||
v3/mainboard/amd/norwich/initram.c:82: error: field name not in record or
|
||||
union initializer /home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/ini
|
||||
tram.c:82: error: (near initialization for 'memctrl') /home/rminnich/src/bios/Lin
|
||||
uxBIOSv3/mainboard/amd/norwich/initram.c:85: error: implicit declaration
|
||||
of function 'SystemPreInit' /home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/n
|
||||
orwich/initram.c:88: error: implicit declaration of function 'cs5536_early_setup'
|
||||
/home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c:95:
|
||||
error: implicit declaration of function 'cs5536_setup_onchipuart' /home/rminnic
|
||||
h/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c:97: error: implicit
|
||||
declaration of function 'uart_init' /home/rminnich/src/bios/LinuxBIOSv3/mainboa
|
||||
rd/amd/norwich/initram.c:100: error: implicit declaration of function 'pll_reset'
|
||||
/home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c:102:
|
||||
error: implicit declaration of function 'cpuRegInit' /home/rminnich/src/bios/Li
|
||||
nuxBIOSv3/mainboard/amd/norwich/initram.c:104: error: implicit declaration
|
||||
of function 'sdram_initialize' /home/rminnich/src/bios/LinuxBIOSv3/mainboard/am
|
||||
d/norwich/initram.c:110: warning: 'return' with no value, in function returning
|
||||
non-void /home/rminnich/src/bios/LinuxBIOSv3/mainboard/amd/norwich/initram.c:81:
|
||||
warning: unused variable 'memctrl' make: exit 2 make: *** [/home/rminnich/src/b
|
||||
ios/LinuxBIOSv3/build/mainboard/amd/norwich/initram.o] Error 1
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
Now what we have to do is start building initram in the familiar way, via
|
||||
linking it with other .o files so it can become a true standalone program.
|
||||
|
||||
\end_layout
|
||||
|
||||
\end_body
|
||||
\end_document
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue