diff options
Diffstat (limited to 'sim/mips/interp.c')
| -rw-r--r-- | sim/mips/interp.c | 57 |
1 files changed, 53 insertions, 4 deletions
diff --git a/sim/mips/interp.c b/sim/mips/interp.c index 9bef890..13cd26e 100644 --- a/sim/mips/interp.c +++ b/sim/mips/interp.c @@ -1758,6 +1758,20 @@ ColdReset (SIM_DESC sd) FPR_STATE[rn] = fmt_uninterpreted; } + /* Initialise the Config0 register. */ + C0_CONFIG = 0x80000000 /* Config1 present */ + | 2; /* KSEG0 uncached */ + if (WITH_TARGET_WORD_BITSIZE == 64) + { + /* FIXME Currently mips/sim-main.c:address_translation() + truncates all addresses to 32-bits. */ + if (0 && WITH_TARGET_ADDRESS_BITSIZE == 64) + C0_CONFIG |= (2 << 13); /* MIPS64, 64-bit addresses */ + else + C0_CONFIG |= (1 << 13); /* MIPS64, 32-bit addresses */ + } + if (BigEndianMem) + C0_CONFIG |= 0x00008000; /* Big Endian */ } } @@ -2252,10 +2266,11 @@ decode_coproc (SIM_DESC sd, #else /* 16 = Config R4000 VR4100 VR4300 */ case 16: - if (code == 0x00) - GPR[rt] = C0_CONFIG; - else - C0_CONFIG = GPR[rt]; + if (code == 0x00) + GPR[rt] = C0_CONFIG; + else + /* only bottom three bits are writable */ + C0_CONFIG = (C0_CONFIG & ~0x7) | (GPR[rt] & 0x7); break; #endif #ifdef SUBTARGET_R3900 @@ -2296,6 +2311,40 @@ decode_coproc (SIM_DESC sd, #endif } } + else if ((code == 0x00 || code == 0x01) + && rd == 16) + { + /* [D]MFC0 RT,C0_CONFIG,SEL */ + signed32 cfg = 0; + switch (tail & 0x07) + { + case 0: + cfg = C0_CONFIG; + break; + case 1: + /* MIPS32 r/o Config1: + Config2 present */ + cfg = 0x80000000; + /* MIPS16 implemented. + XXX How to check configuration? */ + cfg |= 0x0000004; + if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) + /* MDMX & FPU implemented */ + cfg |= 0x00000021; + break; + case 2: + /* MIPS32 r/o Config2: + Config3 present. */ + cfg = 0x80000000; + break; + case 3: + /* MIPS32 r/o Config3: + SmartMIPS implemented. */ + cfg = 0x00000002; + break; + } + GPR[rt] = cfg; + } else if (code == 0x10 && (tail & 0x3f) == 0x18) { /* ERET */ |