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target/m68k: only change valid bits in CACR

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This is used by netBSD (and MacOS ROM) to detect the MMU type

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Thomas Huth <huth@tuxfamily.org>
Message-Id: <20191220172415.35838-1-laurent@vivier.eu>
[lv: add a comment before m680x0_cpu_common()]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2019-12-20 18:24:15 +01:00
parent e24e58e8ac
commit 18b6102e51
3 changed files with 36 additions and 9 deletions
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5
target/m68k/cpu.h
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@ -460,6 +460,10 @@ void do_m68k_semihosting(CPUM68KState *env, int nr);
enum m68k_features {
M68K_FEATURE_M68000,
M68K_FEATURE_M68020,
M68K_FEATURE_M68030,
M68K_FEATURE_M68040,
M68K_FEATURE_M68060,
M68K_FEATURE_CF_ISA_A,
M68K_FEATURE_CF_ISA_B, /* (ISA B or C). */
M68K_FEATURE_CF_ISA_APLUSC, /* BIT/BITREV, FF1, STRLDSR (ISA A+ or C). */
@ -481,7 +485,6 @@ enum m68k_features {
M68K_FEATURE_BKPT,
M68K_FEATURE_RTD,
M68K_FEATURE_CHK2,
M68K_FEATURE_M68040, /* instructions specific to MC68040 */
M68K_FEATURE_MOVEP,
};