Write allocation broken on AMD K6.

From: Dave Jones (dave@denial.force9.co.uk)
Date: Mon Mar 27 2000 - 19:29:33 EST

All,
 The AMD pdf says that the memory range is in bits 7-1, though
I believe the current code doesn't honour this.

The fix is as follows:

--- setup.c~ Tue Mar 28 00:39:19 2000
+++ setup.c Tue Mar 28 00:39:44 2000
@@ -501,7 +501,7 @@
                                 rdmsr(0xC0000082, l, h);
                                 if((l&0x0000FFFF)==0)
                                 {
- l=(1<<0)|(mbytes/4);
+ l=(1<<0)|((mbytes/4)<<1);
                                         save_flags(flags);
                                         __cli();
                                         __asm__ __volatile__ ("wbinvd": : :"memory");

The same problem exists in 2.2.15pre15 and 2.3.99pre3.

regards, 

-- 
Dave.

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This archive was generated by hypermail 2b29 : Fri Mar 31 2000 - 21:00:21 EST