r1418 - cpu/x86/pc/olpc/via

Author: wmb
Date: 2009-10-12 09:51:36 +0200 (Mon, 12 Oct 2009)
New Revision: 1418

Modified:
   cpu/x86/pc/olpc/via/demodram.fth
   cpu/x86/pc/olpc/via/ioinit.fth
   cpu/x86/pc/olpc/via/starthostctl.fth
Log:
Via - folded in a few register settings as recommended by Via,
and added commentary relative to a few others.

Modified: cpu/x86/pc/olpc/via/demodram.fth
===================================================================
--- cpu/x86/pc/olpc/via/demodram.fth	2009-10-11 09:19:26 UTC (rev 1417)
+++ cpu/x86/pc/olpc/via/demodram.fth	2009-10-12 07:51:36 UTC (rev 1418)
@@ -228,6 +228,8 @@
    0 3 devfunc
    50 ee ee mreg \ DDR default MA7 for DRAM init
    51 ee 60 mreg \ DDR default MA3 for CHB init
+   \ Via says 11, 1F gives slightly better performance in their environment,
+   \ but that setting doesn't work for us - it crashes with Forth+X+
    52 ff 33 mreg \ DDR use BA0=M17, BA1=M18,
    53 ff 3F mreg \ DDR	  BA2=M19

@@ -240,7 +242,7 @@
    65 ff d1 mreg \ AGP timer = D; Host timer = 1; (coreboot uses 9 for host timer)
    66 ff 88 mreg \ DRAMC Queue Size = 4; park at the last bus owner,Priority promotion timer = 8
    68 ff 0C mreg
-   69 0F 04 mreg \ set RX69[3:0]=0000b
+   69 0F 04 mreg \ Disable multiple page and page active for now, enable refresh priority
    6A ff 00 mreg \ refresh counter
    6E 87 80 mreg \ must set 6E[7],or else DDR2  probe test will fail
    85 ff 00 mreg
@@ -327,9 +329,9 @@

0 3 devfunc
 forth #banks 8 = assembler [if]
-   69 c3 c3 mreg \ Reinstate page optimizations (03) 8-bank interleave (c0)
+   69 c3 c3 mreg \ Enable page optimizations (03) 8-bank interleave (c0)
 [else]
-   69 c3 83 mreg \ Reinstate page optimizations (03) 4-bank interleave (80)
+   69 c3 83 mreg \ Enable page optimizations (03) 4-bank interleave (80)
 [then]

Modified: cpu/x86/pc/olpc/via/ioinit.fth
===================================================================
--- cpu/x86/pc/olpc/via/ioinit.fth	2009-10-11 09:19:26 UTC (rev 1417)
+++ cpu/x86/pc/olpc/via/ioinit.fth	2009-10-12 07:51:36 UTC (rev 1418)
@@ -43,6 +43,11 @@
    89 ff f8 mreg  \ Dynamic clocks
    8b ff bf mreg  \ Dynamic clocks
    8d ff 30 mreg  \ Self-refresh in C3 and C4
+   \ LuckeLin at Via says: If D0F4 Rx8e[5] was set to 0, we could turn-off PLL in S1 state.
+   \ If your machine does not support S1, it was fine to set it to 1 at all time.
+   \ (wmb adds - D0F4 Rx8e[5] needs to be set to 1 before entering S3, even if set to 0 for S1)
+   \ LuckeLin also says: [Phoenix] Set(s) Rx8e[4] to 1 to fix another S3 issue. Chip internal control
+   \ signal was hard-wired to 1 in new chip. It does not control anything. Please just keep it to be default setting.
    8e ff 20 mreg  \ Leave PLL on in suspend state - necessary for reliable S3
    90 ff ff mreg  \ Gate clocks
    91 ff ff mreg  \ Gate clocks

Modified: cpu/x86/pc/olpc/via/starthostctl.fth
===================================================================
--- cpu/x86/pc/olpc/via/starthostctl.fth	2009-10-11 09:19:26 UTC (rev 1417)
+++ cpu/x86/pc/olpc/via/starthostctl.fth	2009-10-12 07:51:36 UTC (rev 1418)
@@ -25,6 +25,7 @@

55 06 04 mreg  \ Miscellaneous Control 2
    56 f7 63 mreg  \ Write Policy 1
+   57 01 01 mreg  \ Enable fast TRDY by detecting HREQa[5]# de-assertion
    5d ff a2 mreg  \ Write Policy
    5e ff 88 mreg  \ Bandwidth Timer
    5f 46 46 mreg  \ CPU Misc Ctrl