target/ppc/translate: Add dummy implementation for dcblc instruction
The dcblc instruction is used by u-boot in mpc85xx/start.S. Without it, an illegal istruction exception is generated very early in the boot process where the processor is not yet able to handle exceptions. See: https://github.com/u-boot/u-boot/blob/v2023.01/arch/powerpc/cpu/mpc85xx/start.S#L1840 Signed-off-by: Bernhard Beschow <shentey@gmail.com> Message-Id: <20230130184950.5241-1-shentey@gmail.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
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@ -5253,6 +5253,14 @@ static void gen_dcbtls(DisasContext *ctx)
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tcg_temp_free(t0);
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}
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/* dcblc */
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static void gen_dcblc(DisasContext *ctx)
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{
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/*
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* interpreted as no-op
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*/
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}
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/* dcbz */
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static void gen_dcbz(DisasContext *ctx)
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{
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@ -6824,6 +6832,7 @@ GEN_HANDLER_E(dcbtep, 0x1F, 0x1F, 0x09, 0x00000001, PPC_NONE, PPC2_BOOKE206),
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GEN_HANDLER(dcbtst, 0x1F, 0x16, 0x07, 0x00000001, PPC_CACHE),
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GEN_HANDLER_E(dcbtstep, 0x1F, 0x1F, 0x07, 0x00000001, PPC_NONE, PPC2_BOOKE206),
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GEN_HANDLER_E(dcbtls, 0x1F, 0x06, 0x05, 0x02000001, PPC_BOOKE, PPC2_BOOKE206),
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GEN_HANDLER_E(dcblc, 0x1F, 0x06, 0x0c, 0x02000001, PPC_BOOKE, PPC2_BOOKE206),
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GEN_HANDLER(dcbz, 0x1F, 0x16, 0x1F, 0x03C00001, PPC_CACHE_DCBZ),
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GEN_HANDLER_E(dcbzep, 0x1F, 0x1F, 0x1F, 0x03C00001, PPC_NONE, PPC2_BOOKE206),
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GEN_HANDLER(dst, 0x1F, 0x16, 0x0A, 0x01800001, PPC_ALTIVEC),
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