From: Bernhard Beschow <shen...@gmail.com> 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 <shen...@gmail.com> Message-Id: <20230130184950.5241-1-shen...@gmail.com> Acked-by: Richard Henderson <richard.hender...@linaro.org> Reviewed-by: Daniel Henrique Barboza <danielhb...@gmail.com> Signed-off-by: Daniel Henrique Barboza <danielhb...@gmail.com> --- target/ppc/translate.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/target/ppc/translate.c b/target/ppc/translate.c index 2956021e89..37b67d5175 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -5253,6 +5253,14 @@ static void gen_dcbtls(DisasContext *ctx) tcg_temp_free(t0); } +/* dcblc */ +static void gen_dcblc(DisasContext *ctx) +{ + /* + * interpreted as no-op + */ +} + /* dcbz */ static void gen_dcbz(DisasContext *ctx) { @@ -6824,6 +6832,7 @@ GEN_HANDLER_E(dcbtep, 0x1F, 0x1F, 0x09, 0x00000001, PPC_NONE, PPC2_BOOKE206), GEN_HANDLER(dcbtst, 0x1F, 0x16, 0x07, 0x00000001, PPC_CACHE), GEN_HANDLER_E(dcbtstep, 0x1F, 0x1F, 0x07, 0x00000001, PPC_NONE, PPC2_BOOKE206), GEN_HANDLER_E(dcbtls, 0x1F, 0x06, 0x05, 0x02000001, PPC_BOOKE, PPC2_BOOKE206), +GEN_HANDLER_E(dcblc, 0x1F, 0x06, 0x0c, 0x02000001, PPC_BOOKE, PPC2_BOOKE206), GEN_HANDLER(dcbz, 0x1F, 0x16, 0x1F, 0x03C00001, PPC_CACHE_DCBZ), GEN_HANDLER_E(dcbzep, 0x1F, 0x1F, 0x1F, 0x03C00001, PPC_NONE, PPC2_BOOKE206), GEN_HANDLER(dst, 0x1F, 0x16, 0x0A, 0x01800001, PPC_ALTIVEC), -- 2.39.2
