12 Jun
2003
12 Jun
'03
2:04 p.m.
Hi,
On some MPC8260ADS boards, the FPGA (BCSR) supplies Hardware Reset Configuration Word (HRCW) which disables BADDR29-31 pins. As a result of this initialisation, every command must be 8-byte aligned to be fetched. Of course, PPC commands are 4-byte aligned so the board simply does not work. Attached patch fixes the problem by changing SIUMCR. Patch's commands are 8-byte aligned by nops.
--
========================================================================
Yuli Barcohen | Phone +972-9-765-1788 | Software Project Leader
yuli@arabellasw.com | Fax +972-9-765-7494 | Arabella Software, Israel
========================================================================
--- cpu/mpc8260/start.S 2003-06-12 12:25:22.000000000 +0300
+++ Arabella/u-boot/cpu/mpc8260/start.S 2003-06-12 13:43:18.000000000 +0300
@@ -161,9 +161,9 @@ _hrcw_table:
.globl _start
_start:
li r21, BOOTFLAG_COLD /* Normal Power-On: Boot from FLASH*/
+ nop
b boot_cold
-
- . = EXC_OFF_SYS_RESET + 0x10
+ nop
.globl _start_warm
_start_warm:
@@ -171,6 +171,18 @@ _start_warm:
b boot_warm
boot_cold:
+#if defined(CONFIG_MPC8260ADS)
+ lis r3, CFG_DEFAULT_IMMR@h
+ nop
+ lwz r4, 0(r3)
+ nop
+ rlwinm r4, r4, 0, 8, 5
+ nop
+ oris r4, r4, 0x0200
+ nop
+ stw r4, 0(r3)
+ nop
+#endif /* CONFIG_MPC8260ADS */
boot_warm:
mfmsr r5 /* save msr contents */
Fix incorrect SIUMCR initialisation caused by wrong Hard Reset
configuration word supplied by FPGA on some MPC8260ADS boards