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(ColdReset): Set CP0 Config0 to reflect the address size supported 

by this simulator.
	(decode_coproc): Recognise additional CP0 Config registers
	correctly.
This commit is contained in:
Thiemo Seufer 2007-02-19 17:34:18 +00:00
parent 14fb6c5a50
commit 07802d9880
2 changed files with 61 additions and 4 deletions
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8
sim/mips/ChangeLog
View File

@ -1,3 +1,11 @@
2007-02-19 Thiemo Seufer <ths@mips.com>
Nigel Stephens <nigel@mips.com>
(ColdReset): Set CP0 Config0 to reflect the address size supported
by this simulator.
(decode_coproc): Recognise additional CP0 Config registers
correctly.
2007-02-19 Thiemo Seufer <ths@mips.com>
Nigel Stephens <nigel@mips.com>
David Ung <davidu@mips.com>

57
sim/mips/interp.c
View File

@ -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 */