Flat OF Device Tree for ppc32 [was: Platform bus/ppc sys model...]
jakob.viketoft at bitsim.se
Thu Apr 14 19:54:14 EST 2005
Has any more happened on this off-list, or it is just in testing-mode
I applied the changes to a 2.6.12-rc2 tree (with some minor rejects to
sort out) and it compiles and boots fine on my Memec FF1152 board with
the Virtex-II Pro chip (Xilinx ML300 config).
A couple of small changes to be able to use the simple boot-loader is below.
diff -ruN org-nobd-linux-2.6.12-rc2/arch/ppc/boot/simple/embed_config.c
2005-04-04 18:38:03.000000000 +0200
2005-04-14 11:36:49.000000000 +0200
@@ -23,6 +23,8 @@
extern unsigned long timebase_period_ns;
/* For those boards that don't provide one.
@@ -776,8 +778,7 @@
bd->bi_intfreq = XPAR_CORE_CLOCK_FREQ_HZ;
bd->bi_busfreq = XPAR_PLB_CLOCK_FREQ_HZ;
bd->bi_pci_busfreq = XPAR_PCI_0_CLOCK_FREQ_HZ;
- timebase_period_ns = 1000000000 / bd->bi_tbfreq;
- /* see bi_tbfreq definition in
+ timebase_period_ns = 1000000000 / bd->bi_intfreq;
#endif /* CONFIG_XILINX_ML300 */
diff -ruN org-nobd-linux-2.6.12-rc2/arch/ppc/boot/simple/misc-embedded.c
2005-04-04 18:38:04.000000000 +0200
2005-04-14 10:22:38.000000000 +0200
@@ -22,6 +22,7 @@
/* The linker tells us where the image is. */
extern char __image_begin, __image_end;
Jon Loeliger wrote:
> On Thu, 2005-04-07 at 12:49, Tom Rini wrote:
>>Please post to the list as an RFC. Thanks.
> Apologies to those who have received this notice twice.
> I first sent it to the list where it was summarily
> denied for size reasons.
> I have now posted a tgz file here instead:
> What follows is my original email content.
> OK, for those keeping score over on the U-Boot list, _this_
> message is really intended to be sent to the public list. :-)
> Here (as noted above) are my diffs against a clone of
> as last pulled a couple days ago. (*)
> Please consider this a Request For Comments for now. Feel free
> to apply it and test it out as well, of course. :-) I'll sign-off
> on it when it has ripened some more and gets a nod or two...
> These changes relocate almost all of the ppcboot.h definitions
> into new files, arc/ppc/syslib/fw_bdt.[ch] and front them
> with a new, shim interface in include/asm-ppc/firmware.h.
> There is a Kconfig option that allows you to select between
> a "bd_t" interface and a non-existant "OF Flat dev tree"
> interface. Choose wisely (default) for now. It adds the
> new fw_bdt.o file.
> Some potential gotchas or points to note:
> - As of this patch, no interface to any board should change.
> This just isolates the scattered bd_t references to one place.
> - On Kumar's advice arch/ppc/boot/simple was totally ignored.
> For now; this round. It can be next on the hit parade easily.
> It holds the last reference to ppcboot.h still.
> - Earlier cut-n-paste of some devices led to me changing a few
> files over in 68k land to remove some now-obsolete ppcboot.h
> related comments justs for completeness.
> - I've compiled uImage using defconfigs for the following boards:
> 8560_ads cpci690 ash redwood5
> 8540_ads ads_8272 TQM8260 est8260
> rpx8260 bseip mbx mpc834x_sys
> ocotea lite5200 hdpu lopec
> TQM860L rpxlite radstone_ppc7d walnut
> - The file include/asm-ppc/ppcboot.h used to contain a nested
> include of linux/types.h that was tacitly used by many files.
> In ripping ppcboot.h out of many platform .h files, I've had
> to add direct #include <linux/types.h> in several places.
> If your board isn't listed above and it looks really broken,
> consider if it needs a <linux/types.h>?
> (*) -- BK is dead. Long live BK!
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