mirror of
https://github.com/holub/mame
synced 2025-04-23 17:00:53 +03:00
Changed how the PowerPC MMU is enabled at compile time, to cut down on the
amount of unused functions in MAME.
This commit is contained in:
Nathan Woods
parent
2a8c73cc45
commit
43c2c2a002
@ -817,12 +817,10 @@ INLINE UINT32 ppc_get_cr(void)
|
||||
return CR(0) << 28 | CR(1) << 24 | CR(2) << 20 | CR(3) << 16 | CR(4) << 12 | CR(5) << 8 | CR(6) << 4 | CR(7);
|
||||
}
|
||||
|
||||
#ifdef UNUSED_FUNCTION
|
||||
INLINE void ppc_exception(int exception_type)
|
||||
{
|
||||
longjmp(ppc.exception_jmpbuf, exception_type);
|
||||
}
|
||||
#endif
|
||||
|
||||
/***********************************************************************/
|
||||
|
||||
|
||||
@ -122,6 +122,14 @@ enum
|
||||
};
|
||||
|
||||
#ifdef MESS
|
||||
#define PPC_MMU_ENABLED 1
|
||||
#else /* !MESS */
|
||||
/* MMU not enabled in MAME; model3 drivers don't work properly */
|
||||
#define PPC_MMU_ENABLED 0
|
||||
#endif /* MESS */
|
||||
|
||||
|
||||
|
||||
static int ppc_is_protected(UINT32 pp, int flags)
|
||||
{
|
||||
if (flags & PPC_TRANSLATE_WRITE)
|
||||
@ -136,154 +144,156 @@ static int ppc_is_protected(UINT32 pp, int flags)
|
||||
}
|
||||
return FALSE;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int ppc_translate_address(offs_t *addr_ptr, int flags)
|
||||
{
|
||||
#ifdef MESS
|
||||
const BATENT *bat;
|
||||
UINT32 address;
|
||||
UINT32 sr, vsid, hash;
|
||||
UINT32 pteg_address;
|
||||
UINT32 target_pte, bl, mask;
|
||||
UINT64 pte;
|
||||
UINT64 *pteg_ptr[2];
|
||||
int i, hash_type;
|
||||
UINT32 dsisr = DSISR_PROT;
|
||||
|
||||
bat = (flags & PPC_TRANSLATE_CODE) ? ppc.ibat : ppc.dbat;
|
||||
|
||||
address = *addr_ptr;
|
||||
|
||||
/* first check the block address translation table */
|
||||
for (i = 0; i < 4; i++)
|
||||
if (PPC_MMU_ENABLED)
|
||||
{
|
||||
if (bat[i].u & ((MSR & MSR_PR) ? 0x00000001 : 0x00000002))
|
||||
const BATENT *bat;
|
||||
UINT32 address;
|
||||
UINT32 sr, vsid, hash;
|
||||
UINT32 pteg_address;
|
||||
UINT32 target_pte, bl, mask;
|
||||
UINT64 pte;
|
||||
UINT64 *pteg_ptr[2];
|
||||
int i, hash_type;
|
||||
UINT32 dsisr = DSISR_PROT;
|
||||
|
||||
bat = (flags & PPC_TRANSLATE_CODE) ? ppc.ibat : ppc.dbat;
|
||||
|
||||
address = *addr_ptr;
|
||||
|
||||
/* first check the block address translation table */
|
||||
for (i = 0; i < 4; i++)
|
||||
{
|
||||
bl = bat[i].u & 0x00001FFC;
|
||||
mask = (~bl << 15) & 0xFFFE0000;
|
||||
|
||||
if ((address & mask) == (bat[i].u & 0xFFFE0000))
|
||||
{
|
||||
if (ppc_is_protected(bat[i].l, flags))
|
||||
goto exception;
|
||||
|
||||
*addr_ptr = (bat[i].l & 0xFFFE0000)
|
||||
| (address & ((bl << 15) | 0x0001FFFF));
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* now try page address translation */
|
||||
sr = ppc.sr[(address >> 28) & 0x0F];
|
||||
if (sr & 0x80000000)
|
||||
{
|
||||
/* direct store translation */
|
||||
if ((flags & PPC_TRANSLATE_NOEXCEPTION) == 0)
|
||||
fatalerror("ppc: direct store translation not yet implemented");
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* is no execute is set? */
|
||||
if ((flags & PPC_TRANSLATE_CODE) && (sr & 0x10000000))
|
||||
goto exception;
|
||||
|
||||
vsid = sr & 0x00FFFFFF;
|
||||
hash = (vsid & 0x0007FFFF) ^ ((address >> 12) & 0xFFFF);
|
||||
target_pte = (vsid << 7) | ((address >> 22) & 0x3F) | 0x80000000;
|
||||
|
||||
/* we have to try both types of hashes */
|
||||
for (hash_type = 0; hash_type <= 1; hash_type++)
|
||||
{
|
||||
pteg_address = (ppc.sdr1 & 0xFFFF0000)
|
||||
| (((ppc.sdr1 & 0x01FF) & (hash >> 10)) << 16)
|
||||
| ((hash & 0x03FF) << 6);
|
||||
|
||||
pteg_ptr[hash_type] = memory_get_read_ptr(cpu_getactivecpu(), ADDRESS_SPACE_PROGRAM, pteg_address);
|
||||
if (pteg_ptr[hash_type])
|
||||
{
|
||||
for (i = 0; i < 8; i++)
|
||||
{
|
||||
pte = pteg_ptr[hash_type][i];
|
||||
|
||||
/* is valid? */
|
||||
if (((pte >> 32) & 0xFFFFFFFF) == target_pte)
|
||||
{
|
||||
if (ppc_is_protected((UINT32) pte, flags))
|
||||
goto exception;
|
||||
|
||||
*addr_ptr = ((UINT32) (pte & 0xFFFFF000))
|
||||
| (address & 0x0FFF);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
hash ^= 0x7FFFF;
|
||||
target_pte ^= 0x40;
|
||||
}
|
||||
|
||||
if (DUMP_PAGEFAULTS)
|
||||
{
|
||||
mame_printf_debug("PAGE FAULT: address=%08X PC=%08X SDR1=%08X MSR=%08X\n", address, ppc.pc, ppc.sdr1, ppc.msr);
|
||||
mame_printf_debug("\n");
|
||||
|
||||
for (i = 0; i < 4; i++)
|
||||
if (bat[i].u & ((MSR & MSR_PR) ? 0x00000001 : 0x00000002))
|
||||
{
|
||||
bl = bat[i].u & 0x00001FFC;
|
||||
mask = (~bl << 15) & 0xFFFE0000;
|
||||
mame_printf_debug(" BAT[%d]=%08X%08X (A & %08X = %08X)\n", i, bat[i].u, bat[i].l,
|
||||
mask, bat[i].u & 0xFFFE0000);
|
||||
}
|
||||
mame_printf_debug("\n");
|
||||
mame_printf_debug(" VSID=%06X HASH=%05X HASH\'=%05X\n", vsid, hash, hash ^ 0x7FFFF);
|
||||
|
||||
if ((address & mask) == (bat[i].u & 0xFFFE0000))
|
||||
{
|
||||
if (ppc_is_protected(bat[i].l, flags))
|
||||
goto exception;
|
||||
|
||||
*addr_ptr = (bat[i].l & 0xFFFE0000)
|
||||
| (address & ((bl << 15) | 0x0001FFFF));
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* now try page address translation */
|
||||
sr = ppc.sr[(address >> 28) & 0x0F];
|
||||
if (sr & 0x80000000)
|
||||
{
|
||||
/* direct store translation */
|
||||
if ((flags & PPC_TRANSLATE_NOEXCEPTION) == 0)
|
||||
fatalerror("ppc: direct store translation not yet implemented");
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* is no execute is set? */
|
||||
if ((flags & PPC_TRANSLATE_CODE) && (sr & 0x10000000))
|
||||
goto exception;
|
||||
|
||||
vsid = sr & 0x00FFFFFF;
|
||||
hash = (vsid & 0x0007FFFF) ^ ((address >> 12) & 0xFFFF);
|
||||
target_pte = (vsid << 7) | ((address >> 22) & 0x3F) | 0x80000000;
|
||||
|
||||
/* we have to try both types of hashes */
|
||||
for (hash_type = 0; hash_type <= 1; hash_type++)
|
||||
{
|
||||
pteg_address = (ppc.sdr1 & 0xFFFF0000)
|
||||
| (((ppc.sdr1 & 0x01FF) & (hash >> 10)) << 16)
|
||||
| ((hash & 0x03FF) << 6);
|
||||
|
||||
pteg_ptr[hash_type] = memory_get_read_ptr(cpu_getactivecpu(), ADDRESS_SPACE_PROGRAM, pteg_address);
|
||||
if (pteg_ptr[hash_type])
|
||||
{
|
||||
for (i = 0; i < 8; i++)
|
||||
{
|
||||
pte = pteg_ptr[hash_type][i];
|
||||
mame_printf_debug(" PTE[%i%c]=%08X%08X\n",
|
||||
i,
|
||||
hash_type ? '\'' : ' ',
|
||||
(unsigned) (pte >> 32),
|
||||
(unsigned) (pte >> 0));
|
||||
|
||||
/* is valid? */
|
||||
if (((pte >> 32) & 0xFFFFFFFF) == target_pte)
|
||||
{
|
||||
if (ppc_is_protected((UINT32) pte, flags))
|
||||
goto exception;
|
||||
|
||||
*addr_ptr = ((UINT32) (pte & 0xFFFFF000))
|
||||
| (address & 0x0FFF);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
hash ^= 0x7FFFF;
|
||||
target_pte ^= 0x40;
|
||||
}
|
||||
|
||||
if (DUMP_PAGEFAULTS)
|
||||
{
|
||||
mame_printf_debug("PAGE FAULT: address=%08X PC=%08X SDR1=%08X MSR=%08X\n", address, ppc.pc, ppc.sdr1, ppc.msr);
|
||||
mame_printf_debug("\n");
|
||||
|
||||
for (i = 0; i < 4; i++)
|
||||
{
|
||||
bl = bat[i].u & 0x00001FFC;
|
||||
mask = (~bl << 15) & 0xFFFE0000;
|
||||
mame_printf_debug(" BAT[%d]=%08X%08X (A & %08X = %08X)\n", i, bat[i].u, bat[i].l,
|
||||
mask, bat[i].u & 0xFFFE0000);
|
||||
}
|
||||
mame_printf_debug("\n");
|
||||
mame_printf_debug(" VSID=%06X HASH=%05X HASH\'=%05X\n", vsid, hash, hash ^ 0x7FFFF);
|
||||
|
||||
for (hash_type = 0; hash_type <= 1; hash_type++)
|
||||
{
|
||||
if (pteg_ptr[hash_type])
|
||||
{
|
||||
for (i = 0; i < 8; i++)
|
||||
{
|
||||
pte = pteg_ptr[hash_type][i];
|
||||
mame_printf_debug(" PTE[%i%c]=%08X%08X\n",
|
||||
i,
|
||||
hash_type ? '\'' : ' ',
|
||||
(unsigned) (pte >> 32),
|
||||
(unsigned) (pte >> 0));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
dsisr = DSISR_PAGE;
|
||||
dsisr = DSISR_PAGE;
|
||||
|
||||
exception:
|
||||
/* lookup failure - exception */
|
||||
if ((flags & PPC_TRANSLATE_NOEXCEPTION) == 0)
|
||||
{
|
||||
if (flags & PPC_TRANSLATE_CODE)
|
||||
/* lookup failure - exception */
|
||||
if ((flags & PPC_TRANSLATE_NOEXCEPTION) == 0)
|
||||
{
|
||||
ppc_exception(EXCEPTION_ISI);
|
||||
}
|
||||
else
|
||||
{
|
||||
ppc.dar = address;
|
||||
if (flags & PPC_TRANSLATE_WRITE)
|
||||
ppc.dsisr = dsisr | DSISR_STORE;
|
||||
if (flags & PPC_TRANSLATE_CODE)
|
||||
{
|
||||
ppc_exception(EXCEPTION_ISI);
|
||||
}
|
||||
else
|
||||
ppc.dsisr = dsisr;
|
||||
{
|
||||
ppc.dar = address;
|
||||
if (flags & PPC_TRANSLATE_WRITE)
|
||||
ppc.dsisr = dsisr | DSISR_STORE;
|
||||
else
|
||||
ppc.dsisr = dsisr;
|
||||
|
||||
ppc_exception(EXCEPTION_DSI);
|
||||
ppc_exception(EXCEPTION_DSI);
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* MMU not enabled in MAME; model3 drivers don't work properly */
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
#else
|
||||
/* MMU not enabled in MAME; model3 drivers don't work properly */
|
||||
return 1;
|
||||
#endif
|
||||
}
|
||||
|
||||
#if (HAS_PPC602||HAS_PPC603)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user