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030 version of transparent translation init.

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26459 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
François Revol 2008-07-17 00:03:38 +00:00
parent 3cd9fb7518
commit b092ec2850
1 changed files with 31 additions and 1 deletions
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32
src/system/boot/platform/atari_m68k/mmu_030.cpp
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@ -46,8 +46,38 @@ static status_t
set_tt(int which, addr_t pa, size_t len, uint32 perms)
{
TRACE(("mmu_030:set_tt(%d, 0x%lx, %ld, 0x%08lx)\n", which, pa, len, perms));
uint32 mask;
uint32 ttr = 0;
mask = 1;
if (len) {
while (len >>= 1)
mask <<= 1;
mask = (mask - 1);
// enable, cachable(?), r/w
// super only
// mc68030 user's manual, page 9-57
ttr = 0x08043;
ttr |= (pa & 0xff000000);
ttr |= ((mask & 0xff000000) >> 8);
}
TRACE(("mmu_030:set_tt: 0x%08lx\n", ttr));
return B_ERROR;
switch (which) {
case 0:
asm volatile( \
"pmove %0,%%tt0\n" \
: : "d"(ttr));
break;
case 1:
asm volatile( \
"pmove %0,%%tt1\n" \
: : "d"(ttr));
break;
default:
return EINVAL;
}
return B_OK;
}