#include "sim-main.h"
#include "sim-assert.h"
-#if !(WITH_IGEN)
-#define SIM_MANIFESTS
-#include "oengine.c"
-#undef SIM_MANIFESTS
-#endif
-
/*---------------------------------------------------------------------------*/
/*-- simulator engine -------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
-/* start-sanitize-sky */
-#ifdef TARGET_SKY
-
-/* Description from page A-22 of the "MIPS IV Instruction Set" manual
- (revision 3.1) */
-
-/* Translate a virtual address to a physical address and cache
- coherence algorithm describing the mechanism used to resolve the
- memory reference. Given the virtual address vAddr, and whether the
- reference is to Instructions ot Data (IorD), find the corresponding
- physical address (pAddr) and the cache coherence algorithm (CCA)
- used to resolve the reference. If the virtual address is in one of
- the unmapped address spaces the physical address and the CCA are
- determined directly by the virtual address. If the virtual address
- is in one of the mapped address spaces then the TLB is used to
- determine the physical address and access type; if the required
- translation is not present in the TLB or the desired access is not
- permitted the function fails and an exception is taken.
-
- NOTE: Normally (RAW == 0), when address translation fails, this
- function raises an exception and does not return. */
-
-/* This implementation is for the MIPS R4000 family. See MIPS RISC
- Architecture, Kane & Heinrich, Chapter 4. It is no good for any
- of the 2000, 3000, or 6000 family.
-
- One possible error in the K&H book of note. K&H has the PFN entry
- in the TLB as being 24 bits. The high-order 4 bits would seem to be
- unused, as the PFN is only 20-bits long. The 5900 manual shows
- this as a 20-bit field. At any rate, the high order 4 bits are
- unused.
-*/
-
-
-
-/* A place to remember the last cache hit. */
-static r4000_tlb_entry_t *last_hit = 0;
-
-/* Try to match a single TLB entry. Three possibilities.
- 1. No match, returns 0
- 2. Match w/o exception, pAddr and CCA set, returns 1
- 3. Match w/ exception, in which case tlb_try_match does not return.
-*/
-INLINE_SIM_MAIN (int)
-tlb_try_match (SIM_DESC SD, sim_cpu *CPU, address_word cia, r4000_tlb_entry_t * entry, unsigned32 asid, unsigned32 vAddr, address_word * pAddr, int *CCA, int LorS)
-{
- unsigned32 page_mask, vpn2_mask;
- page_mask = (entry->mask & 0x01ffe000);
- vpn2_mask = ~(page_mask | 0x00001fff);
-
- if ((vAddr & vpn2_mask) == (entry->hi & vpn2_mask)
- && ((entry->hi & TLB_HI_ASID_MASK) == asid
- || (entry->hi & TLB_HI_G_MASK) != 0))
- {
- /* OK. Now, do we match lo0, or lo1? */
- unsigned32 offset_mask, vpn_lo_mask, vpn_mask, lo;
-
- offset_mask = (page_mask >> 1) | 0xfff;
- vpn_lo_mask = offset_mask + 1;
- vpn_mask = ~(offset_mask);
-
- ASSERT(vpn_lo_mask == (-vpn2_mask) >> 1);
- ASSERT(vpn_mask ^ vpn_lo_mask == vpn2_mask);
-
- if ((vAddr & vpn_lo_mask) == 0)
- {
- lo = entry->lo0;
- }
- else
- {
- lo = entry->lo1;
- }
-
- /* Warn upon attempted use of scratchpad RAM */
- if(entry->lo0 & TLB_LO_S_MASK)
- {
- sim_io_printf(SD,
- "Warning: no scratchpad RAM: virtual 0x%08x maps to physical 0x%08x.\n",
- vAddr, (vAddr & offset_mask));
-
- /* act as if this is a valid, read/write page. */
- lo = TLB_LO_V_MASK | TLB_LO_D_MASK;
-
- /* alternately, act as if this TLB entry is not a match */
- /* return 0; */
- }
-
- if ((lo & TLB_LO_V_MASK) == 0)
- {
- COP0_BADVADDR = vAddr;
- COP0_CONTEXT_set_BADVPN2((vAddr & 0xffffe) >> 19); /* Top 19 bits */
- COP0_ENTRYHI = (vAddr & 0xffffe) | asid;
- COP0_RANDOM = rand()%(TLB_SIZE - COP0_WIRED) + COP0_WIRED;
- if (LorS == isLOAD)
- SignalExceptionTLBInvalidLoad ();
- else
- SignalExceptionTLBInvalidStore ();
- ASSERT(0); /* Signal should never return. */
- }
-
- if ((lo & TLB_LO_D_MASK) == 0 && (LorS == isSTORE))
- {
- COP0_BADVADDR = vAddr;
- COP0_CONTEXT_set_BADVPN2((vAddr & 0xffffe) >> 19); /* Top 19 bits */
- COP0_ENTRYHI = (vAddr & 0xffffe) | asid;
- COP0_RANDOM = rand()%(TLB_SIZE - COP0_WIRED) + COP0_WIRED;
- SignalExceptionTLBModification ();
- ASSERT(0); /* Signal should never return. */
- }
-
- /* Ignore lo.C rule for Cache access */
-
- *pAddr = (((lo & 0x03ffffc0) << 6) & (~offset_mask)) + (vAddr & offset_mask);
- *CCA = Uncached; /* FOR NOW, no CCA support. */
-
- last_hit = entry; /* Remember last hit. */
-
- return 1; /* Match */
- }
-
- return 0; /* No Match */
-}
-
-static void
-dump_tlb(SIM_DESC SD, sim_cpu *CPU, address_word cia) {
-
- int i;
- /* Now linear search for a match. */
-
- for (i = 0; i < TLB_SIZE; i++)
- {
- sim_io_eprintf(SD, "%2d: %08x %08x %08x %08x\n", i, TLB[i].mask, TLB[i].hi,
- TLB[i].lo0, TLB[i].lo1);
- }
-}
-
-
-INLINE_SIM_MAIN (void)
-tlb_lookup (SIM_DESC SD, sim_cpu * CPU, address_word cia, unsigned32 vAddr, address_word * pAddr, int *CCA, int LorS)
-{
- r4000_tlb_entry_t *p;
- unsigned32 asid;
- int rc;
-
- asid = COP0_ENTRYHI & 0x000000ff;
-
- /* Test last hit first. More code, but probably faster on average. */
- if (last_hit)
- {
- if (tlb_try_match (SD, CPU, cia, last_hit, asid, vAddr, pAddr, CCA, LorS))
- return;
- }
-
- /* Now linear search for a match. */
- for (p = &TLB[0]; p < &TLB[TLB_SIZE]; p++)
- {
- if (tlb_try_match (SD, CPU, cia, p, asid, vAddr, pAddr, CCA, LorS))
- return;
- }
-
- /* No match, raise a TLB refill exception. */
- COP0_BADVADDR = vAddr;
- COP0_CONTEXT_set_BADVPN2((vAddr & 0xffffe) >> 19); /* Top 19 bits */
- COP0_ENTRYHI = (vAddr & 0xffffe) | asid;
- COP0_RANDOM = rand()%(TLB_SIZE - COP0_WIRED) + COP0_WIRED;
-
-#if 0
-sim_io_eprintf(SD, "TLB Refill exception at address 0x%0x\n", vAddr);
-dump_tlb(SD, CPU, cia);
-#endif
-
- if (LorS == isLOAD)
- SignalExceptionTLBRefillLoad ();
- else
- SignalExceptionTLBRefillStore ();
- ASSERT(0); /* Signal should never return. */
-}
-
-
-INLINE_SIM_MAIN (int)
-address_translation (SIM_DESC SD,
- sim_cpu * CPU,
- address_word cia,
- address_word vAddr,
- int IorD,
- int LorS,
- address_word * pAddr,
- int *CCA,
- int raw)
-{
- unsigned32 operating_mode;
- unsigned32 asid, vpn, offset, offset_bits;
-
-#ifdef DEBUG
- sim_io_printf (sd, "AddressTranslation(0x%s,%s,%s,...);\n", pr_addr (vAddr), (IorD ? "isDATA" : "isINSTRUCTION"), (LorS ? "iSTORE" : "isLOAD"));
-#endif
-
- vAddr &= 0xFFFFFFFF;
-
- /* Determine operating mode. */
- operating_mode = SR_KSU;
- if (SR & status_ERL || SR & status_EXL)
- operating_mode = ksu_kernel;
-
- switch (operating_mode)
- {
- case ksu_unknown:
- sim_io_eprintf (SD, "Invalid operating mode SR.KSU == 0x3. Treated as 0x0.\n");
- operating_mode = ksu_kernel;
- /* Fall-through */
- case ksu_kernel:
- /* Map and return for kseg0 and kseg1. */
- if ((vAddr & 0xc0000000) == 0x80000000)
- {
- ASSERT (0x80000000 <= vAddr && vAddr < 0xc0000000);
- if (vAddr < 0xa0000000)
- {
- /* kseg0: Unmapped, Cached */
- *pAddr = vAddr - 0x80000000;
- *CCA = Uncached; /* For now, until cache model is supported. */
- return -1;
- }
- else
- {
- /* kseg1: Unmapped, Uncached */
- *pAddr = vAddr - 0xa0000000;
- *CCA = Uncached;
- return -1;
- }
- }
- break;
-
- case ksu_supervisor:
- {
- /* Address error for 0x80000000->0xbfffffff and 0xe00000000->0xffffffff. */
- unsigned32 top_three = vAddr & 0xe0000000;
- if (top_three != 0x00000000 && top_three != 0xc0000000)
- {
- if (LorS == isLOAD)
- SignalExceptionAddressLoad ();
- else
- SignalExceptionAddressStore ();
- ASSERT(0); /* Signal should never return. */
- }
- }
- break;
-
- case ksu_user:
- {
- if (vAddr & 0x80000000)
- {
- if (LorS == isLOAD)
- SignalExceptionAddressLoad ();
- else
- SignalExceptionAddressStore ();
- ASSERT(0); /* Signal should never return. */
- }
- }
- break;
-
- default:
- ASSERT(0);
- }
-
- /* OK. If we got this far, we're ready to use the normal virtual->physical memory mapping. */
- tlb_lookup (SD, CPU, cia, vAddr, pAddr, CCA, LorS);
-
- /* If the preceding call returns, a match was found, and CCA and pAddr have been set. */
- return -1;
-}
-
-#else /* TARGET_SKY */
-/* end-sanitize-sky */
/* Description from page A-22 of the "MIPS IV Instruction Set" manual
(revision 3.1) */
return (res);
}
-/* start-sanitize-sky */
-#endif /* !TARGET_SKY */
-/* end-sanitize-sky */
/* Description from page A-23 of the "MIPS IV Instruction Set" manual
sim_io_eprintf(sd,"LoadMemory CCA (%d) is not uncached (currently all accesses treated as cached)\n",CCA);
#endif /* WARN_MEM */
-#if !(WITH_IGEN)
- /* IGEN performs this test in ifetch16() / ifetch32() */
- /* If instruction fetch then we need to check that the two lo-order
- bits are zero, otherwise raise a InstructionFetch exception: */
- if ((IorD == isINSTRUCTION)
- && ((pAddr & 0x3) != 0)
- && (((pAddr & 0x1) != 0) || ((vAddr & 0x1) == 0)))
- SignalExceptionInstructionFetch ();
-#endif
-
if (((pAddr & LOADDRMASK) + AccessLength) > LOADDRMASK)
{
/* In reality this should be a Bus Error */
switch (AccessLength)
{
- case AccessLength_QUADWORD :
+ case AccessLength_QUADWORD:
{
- unsigned_16 val = sim_core_read_aligned_16 (CPU, NULL_CIA, read_map, pAddr);
+ unsigned_16 val = sim_core_read_aligned_16 (CPU, cia, read_map, pAddr);
value1 = VH8_16 (val);
value = VL8_16 (val);
break;
}
- case AccessLength_DOUBLEWORD :
- value = sim_core_read_aligned_8 (CPU, NULL_CIA,
- read_map, pAddr);
+ case AccessLength_DOUBLEWORD:
+ value = sim_core_read_aligned_8 (CPU, cia, read_map, pAddr);
break;
- case AccessLength_SEPTIBYTE :
- value = sim_core_read_misaligned_7 (CPU, NULL_CIA,
- read_map, pAddr);
+ case AccessLength_SEPTIBYTE:
+ value = sim_core_read_misaligned_7 (CPU, cia, read_map, pAddr);
break;
- case AccessLength_SEXTIBYTE :
- value = sim_core_read_misaligned_6 (CPU, NULL_CIA,
- read_map, pAddr);
+ case AccessLength_SEXTIBYTE:
+ value = sim_core_read_misaligned_6 (CPU, cia, read_map, pAddr);
break;
- case AccessLength_QUINTIBYTE :
- value = sim_core_read_misaligned_5 (CPU, NULL_CIA,
- read_map, pAddr);
+ case AccessLength_QUINTIBYTE:
+ value = sim_core_read_misaligned_5 (CPU, cia, read_map, pAddr);
break;
- case AccessLength_WORD :
- value = sim_core_read_aligned_4 (CPU, NULL_CIA,
- read_map, pAddr);
+ case AccessLength_WORD:
+ value = sim_core_read_aligned_4 (CPU, cia, read_map, pAddr);
break;
- case AccessLength_TRIPLEBYTE :
- value = sim_core_read_misaligned_3 (CPU, NULL_CIA,
- read_map, pAddr);
+ case AccessLength_TRIPLEBYTE:
+ value = sim_core_read_misaligned_3 (CPU, cia, read_map, pAddr);
break;
- case AccessLength_HALFWORD :
- value = sim_core_read_aligned_2 (CPU, NULL_CIA,
- read_map, pAddr);
+ case AccessLength_HALFWORD:
+ value = sim_core_read_aligned_2 (CPU, cia, read_map, pAddr);
break;
- case AccessLength_BYTE :
- value = sim_core_read_aligned_1 (CPU, NULL_CIA,
- read_map, pAddr);
+ case AccessLength_BYTE:
+ value = sim_core_read_aligned_1 (CPU, cia, read_map, pAddr);
break;
default:
abort ();
switch (AccessLength)
{
- case AccessLength_QUADWORD :
+ case AccessLength_QUADWORD:
{
unsigned_16 val = U16_8 (MemElem1, MemElem);
- sim_core_write_aligned_16 (CPU, NULL_CIA, write_map, pAddr, val);
+ sim_core_write_aligned_16 (CPU, cia, write_map, pAddr, val);
break;
}
- case AccessLength_DOUBLEWORD :
- sim_core_write_aligned_8 (CPU, NULL_CIA,
- write_map, pAddr, MemElem);
+ case AccessLength_DOUBLEWORD:
+ sim_core_write_aligned_8 (CPU, cia, write_map, pAddr, MemElem);
break;
- case AccessLength_SEPTIBYTE :
- sim_core_write_misaligned_7 (CPU, NULL_CIA,
- write_map, pAddr, MemElem);
+ case AccessLength_SEPTIBYTE:
+ sim_core_write_misaligned_7 (CPU, cia, write_map, pAddr, MemElem);
break;
- case AccessLength_SEXTIBYTE :
- sim_core_write_misaligned_6 (CPU, NULL_CIA,
- write_map, pAddr, MemElem);
+ case AccessLength_SEXTIBYTE:
+ sim_core_write_misaligned_6 (CPU, cia, write_map, pAddr, MemElem);
break;
- case AccessLength_QUINTIBYTE :
- sim_core_write_misaligned_5 (CPU, NULL_CIA,
- write_map, pAddr, MemElem);
+ case AccessLength_QUINTIBYTE:
+ sim_core_write_misaligned_5 (CPU, cia, write_map, pAddr, MemElem);
break;
- case AccessLength_WORD :
- sim_core_write_aligned_4 (CPU, NULL_CIA,
- write_map, pAddr, MemElem);
+ case AccessLength_WORD:
+ sim_core_write_aligned_4 (CPU, cia, write_map, pAddr, MemElem);
break;
- case AccessLength_TRIPLEBYTE :
- sim_core_write_misaligned_3 (CPU, NULL_CIA,
- write_map, pAddr, MemElem);
+ case AccessLength_TRIPLEBYTE:
+ sim_core_write_misaligned_3 (CPU, cia, write_map, pAddr, MemElem);
break;
- case AccessLength_HALFWORD :
- sim_core_write_aligned_2 (CPU, NULL_CIA,
- write_map, pAddr, MemElem);
+ case AccessLength_HALFWORD:
+ sim_core_write_aligned_2 (CPU, cia, write_map, pAddr, MemElem);
break;
- case AccessLength_BYTE :
- sim_core_write_aligned_1 (CPU, NULL_CIA,
- write_map, pAddr, MemElem);
+ case AccessLength_BYTE:
+ sim_core_write_aligned_1 (CPU, cia, write_map, pAddr, MemElem);
break;
default:
abort ();
break;
case 1: /* data cache */
+ case 3: /* secondary data cache */
switch (op >> 2) {
case 0: /* Index Writeback Invalidate */
case 1: /* Index Load Tag */
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