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target/m68k: use M68K_FEATURE_MOVEFROMSR_PRIV feature for move_from_sr privilege check

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Now that M68K_FEATURE_M68000 has been renamed to M68K_FEATURE_M68K it is easier
to see that the privilege exception check is wrong: it is currently only generated
for ColdFire CPUs when in fact it should also be generated for Motorola CPUs from
the 68010 onwards.

Introduce a new M68K_FEATURE_MOVEFROMSR_PRIV feature which is set for all non-
Motorola CPUs, and for all Motorola CPUs from the 68010 onwards and use it to
determine whether a privilege exception should be generated for the MOVE-from-SR
instruction.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220925134804.139706-3-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2022-09-25 14:48:04 +01:00 • committed by Laurent Vivier
parent 2dc7bf63cf
commit b342e56b23
3 changed files with 8 additions and 1 deletions
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2
target/m68k/cpu.h
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@ -537,6 +537,8 @@ enum m68k_features {
M68K_FEATURE_UNALIGNED_DATA,
/* TRAPcc insn. (680[2346]0, and CPU32) */
M68K_FEATURE_TRAPCC,
/* MOVE from SR privileged (from 68010) */
M68K_FEATURE_MOVEFROMSR_PRIV,
};
static inline bool m68k_feature(CPUM68KState *env, int feature)