diff options
Diffstat (limited to 'c/src/lib/libcpu/powerpc/mpc6xx/mmu/pte121.c')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/mpc6xx/mmu/pte121.c | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/c/src/lib/libcpu/powerpc/mpc6xx/mmu/pte121.c b/c/src/lib/libcpu/powerpc/mpc6xx/mmu/pte121.c index d0676833f7..5d25a1ac17 100644 --- a/c/src/lib/libcpu/powerpc/mpc6xx/mmu/pte121.c +++ b/c/src/lib/libcpu/powerpc/mpc6xx/mmu/pte121.c @@ -22,8 +22,8 @@ #include <rtems.h> #include <rtems/bspIo.h> #include <libcpu/cpuIdent.h> -#include <bsp.h> #ifdef DEBUG_EXC +#include <bsp.h> #include <bsp/vectors.h> #include <libcpu/raw_exception.h> #endif @@ -125,7 +125,7 @@ /* Horrible Macros */ -#ifdef __rtems +#ifdef __rtems__ /* must not use printf until multitasking is up */ typedef void (*PrintF)(char *,...); static PrintF whatPrintf(void) @@ -363,8 +363,8 @@ triv121PgTblInit(unsigned long base, unsigned ldSize) if (base & ((1<<ldSize)-1)) return 0; /* misaligned */ - /* This should work on a 604, but I couldn't test (I did - * on 750 and 7400). Verify that the TLB invalidation works + /* This was tested on 604r, 750 and 7400. + * On other CPUs, verify that the TLB invalidation works * for a new CPU variant and that it has hardware PTE lookup/ * TLB replacement before adding it to this list. * @@ -678,10 +678,34 @@ static int maxw=20; /* mute after detecting this many errors */ } v=m=0; - for (i=0, pte=pt->base; i<pt->size/sizeof(PTERec); i++,pte++) { +#if 1 + /* 10/9/2002: I had machine checks crashing after this loop + * terminated. Maybe caused by speculative loads + * from beyond the valid memory area (since the + * page hash table sits at the top of physical + * memory). + * Very bizarre - the other loops in this file + * seem to be fine. Maybe there is a compiler bug?? + * For the moment, I let the loop run backwards... + * + * Also see the comment a couple of lines down. + */ + for (i=pt->size/sizeof(PTERec)-1, pte=pt->base + i; i>=0; i--,pte--) +#else + for (i=0, pte=pt->base; i<pt->size/sizeof(PTERec); i++,pte++) +#endif + { int err=0; char buf[500]; unsigned long *lp=(unsigned long*)pte; +#if 0 + /* If I put this bogus while statement here (the body is + * never reached), the original loop works OK + */ + while (pte >= pt->base + pt->size/sizeof(PTERec)) + /* never reached */; +#endif + if ( (*lp & (0xfffff0<<7)) || *(lp+1) & 0xe00 || (pte->v && pte->marked)) { /* check for vsid (without segment bits) == 0, unused bits == 0, valid && marked */ sprintf(buf,"invalid VSID , unused bits or v && m"); |