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authorHaiying Wang <haiying.wang@freescale.com>2007-01-22 12:37:30 -0600
committerJon Loeliger <jdl@freescale.com>2007-04-09 14:25:05 -0500
commit3d98b85800c80dc68227c8f10bf5c93456d6d054 (patch)
tree791444da92489cc58c16e417e33fb73e852323a6 /doc/README.mpc8641hpcn
parent6db7d0af2336c126e4d4b2f248cc23516bdd46a8 (diff)
downloadtalos-obmc-uboot-3d98b85800c80dc68227c8f10bf5c93456d6d054.tar.gz
talos-obmc-uboot-3d98b85800c80dc68227c8f10bf5c93456d6d054.zip
Add PIXIS FPGA support for MPC8641HPCN board.
Move the 8641HPCN's PIXIS code to the new directory board/freescale/common/ as it will be shared by future boards not in the same processor family. Write a "pixis_reset" command that utilizes the FPGA reset sequencer to support alternate soft-reset options such as using the "alternate" flash bank, enabling the watch dog, or choosing different CPU frequencies. Add documentation for the pixis_reset to README.mpc8641hpcn. Signed-off-by: Haiying Wang <haiying.wang@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com>
Diffstat (limited to 'doc/README.mpc8641hpcn')
-rw-r--r--doc/README.mpc8641hpcn34
1 files changed, 34 insertions, 0 deletions
diff --git a/doc/README.mpc8641hpcn b/doc/README.mpc8641hpcn
index 4a650ce43c..3b88f8bc72 100644
--- a/doc/README.mpc8641hpcn
+++ b/doc/README.mpc8641hpcn
@@ -121,3 +121,37 @@ To Flash U-boot into the alternative bank (0xFF800000 - 0xFFBFFFFF):
0xe300_0000 0xe3ff_ffff PCI2/PEX2 IO 16M
0xfe00_0000 0xfeff_ffff Flash(alternate)16M
0xff00_0000 0xffff_ffff Flash(boot bank)16M
+
+5. pixis_reset command
+--------------------
+A new command, "pixis_reset", is introduced to reset mpc8641hpcn board
+using the FPGA sequencer. When the board restarts, it has the option
+of using either the current or alternate flash bank as the boot
+image, with or without the watchdog timer enabled, and finally with
+or without frequency changes.
+
+Usage is;
+
+ pixis_reset
+ pixis_reset altbank
+ pixis_reset altbank wd
+ pixis_reset altbank cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>
+ pixis_reset cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>
+
+Examples;
+
+ /* reset to current bank, like "reset" command */
+ pixis_reset
+
+ /* reset board but use the to alternate flash bank */
+ pixis_reset altbank
+
+ /* reset board, use alternate flash bank with watchdog timer enabled*/
+ pixis_reset altbank wd
+
+ /* reset board to alternate bank with frequency changed.
+ * 40 is SYSCLK, 2.5 is COREPLL ratio, 10 is MPXPLL ratio
+ */
+ pixis-reset altbank cf 40 2.5 10
+
+Valid clock choices are in the 8641 Reference Manuals.
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