summaryrefslogtreecommitdiffstats
path: root/c/src/lib/libcpu/powerpc/mpc6xx/mmu/bat.c
diff options
context:
space:
mode:
authorJoel Sherrill <joel.sherrill@OARcorp.com>2003-02-20 22:07:22 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2003-02-20 22:07:22 +0000
commitd49389adb995168842d8f5b967945f6bbb281244 (patch)
tree7035607055dbc6c107416c594e7baefb89e69332 /c/src/lib/libcpu/powerpc/mpc6xx/mmu/bat.c
parent2003-02-20 Till Straumann <strauman@slac.stanford.edu> (diff)
downloadrtems-d49389adb995168842d8f5b967945f6bbb281244.tar.bz2
2003-02-20 Till Straumann <strauman@slac.stanford.edu>
PR 349/bsps * mpc6xx/exceptions/raw_exception.c, mpc6xx/mmu/bat.c, mpc6xx/mmu/pte121.c, shared/include/cpuIdent.c, shared/include/cpuIdent.h, shared/src/Makefile.am, shared/src/stack.c, shared/src/stackTrace.h, powerpc/registers.h: - undo improper 'fix' who broke mpc604r identification - fix: 7400 identification PVR value was wrong - enhance 'setdbat()' to switch OFF a given BAT if called with 0 size - fix: page table support bugfix - enhancement: provide routines to take and print stack trace snapshots - add definitions for HID1 and DABR SPRs
Diffstat (limited to 'c/src/lib/libcpu/powerpc/mpc6xx/mmu/bat.c')
-rw-r--r--c/src/lib/libcpu/powerpc/mpc6xx/mmu/bat.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/c/src/lib/libcpu/powerpc/mpc6xx/mmu/bat.c b/c/src/lib/libcpu/powerpc/mpc6xx/mmu/bat.c
index 4e49bcc07e..9c2df3f03f 100644
--- a/c/src/lib/libcpu/powerpc/mpc6xx/mmu/bat.c
+++ b/c/src/lib/libcpu/powerpc/mpc6xx/mmu/bat.c
@@ -43,7 +43,7 @@ void setdbat(int bat_index, unsigned long virt, unsigned long phys,
int wimgxpp;
ubat bat;
- bl = (size >> 17) - 1;
+ bl = (size >= (1<<17)) ? (size >> 17) - 1 : 0;
/* 603, 604, etc. */
wimgxpp = flags & (_PAGE_WRITETHRU | _PAGE_NO_CACHE
| _PAGE_COHERENT | _PAGE_GUARDED);
@@ -53,8 +53,13 @@ void setdbat(int bat_index, unsigned long virt, unsigned long phys,
if (flags & _PAGE_USER)
bat.bat.batu.vp = 1;
bat_addrs[bat_index].start = virt;
- bat_addrs[bat_index].limit = virt + ((bl + 1) << 17) - 1;
+ bat_addrs[bat_index].limit = virt + (bl ? ((bl + 1) << 17) - 1 : 0);
bat_addrs[bat_index].phys = phys;
+ if ( 0 == bl ) {
+ /* size of 0 tells us to switch it off */
+ bat.bat.batu.vp = 0;
+ bat.bat.batu.vs = 0;
+ }
switch (bat_index) {
case 0 : asm_setdbat0(bat.word[0], bat.word[1]); break;
case 1 : asm_setdbat1(bat.word[0], bat.word[1]); break;