e05da09b7c
Zicbom is the Cache-Block Management extension defined in the already ratified RISC-V Base Cache Management Operation (CBO) ISA extension [1]. The extension contains three instructions: cbo.clean, cbo.flush and cbo.inval. All of them must be implemented in the same group as LQ and cbo.zero due to overlapping patterns. All these instructions can throw a Illegal Instruction/Virtual Instruction exception, similar to the existing cbo.zero. The same check_zicbo_envcfg() is used to handle these exceptions. Aside from that, these instructions also need to handle page faults and guest page faults. This is done in a new check_zicbom_access() helper. As with Zicboz, the cache block size for Zicbom is also configurable. Note that the spec determines that Zicbo[mp] and Zicboz can have different cache sizes (Section 2.7 of [1]), so we also include a 'cbom_blocksize' to go along with the existing 'cboz_blocksize'. They are set to the same size, so unless users want to play around with the settings both sizes will be the same. [1] https://github.com/riscv/riscv-CMOs/blob/master/specifications/cmobase-v1.0.1.pdf Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn> Co-developed-by: Philipp Tomsich <philipp.tomsich@vrull.eu> Signed-off-by: Christoph Muellner <cmuellner@linux.com> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Message-ID: <20230224132536.552293-4-dbarboza@ventanamicro.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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* RISC-V translation routines for the RISC-V CBO Extension.
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*
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* Copyright (c) 2021 Philipp Tomsich, philipp.tomsich@vrull.eu
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2 or later, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define REQUIRE_ZICBOM(ctx) do { \
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if (!ctx->cfg_ptr->ext_icbom) { \
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return false; \
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} \
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} while (0)
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#define REQUIRE_ZICBOZ(ctx) do { \
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if (!ctx->cfg_ptr->ext_icboz) { \
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return false; \
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} \
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} while (0)
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static bool trans_cbo_clean(DisasContext *ctx, arg_cbo_clean *a)
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{
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REQUIRE_ZICBOM(ctx);
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gen_helper_cbo_clean_flush(cpu_env, cpu_gpr[a->rs1]);
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return true;
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}
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static bool trans_cbo_flush(DisasContext *ctx, arg_cbo_flush *a)
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{
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REQUIRE_ZICBOM(ctx);
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gen_helper_cbo_clean_flush(cpu_env, cpu_gpr[a->rs1]);
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return true;
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}
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static bool trans_cbo_inval(DisasContext *ctx, arg_cbo_inval *a)
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{
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REQUIRE_ZICBOM(ctx);
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gen_helper_cbo_inval(cpu_env, cpu_gpr[a->rs1]);
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return true;
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}
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static bool trans_cbo_zero(DisasContext *ctx, arg_cbo_zero *a)
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{
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REQUIRE_ZICBOZ(ctx);
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gen_helper_cbo_zero(cpu_env, cpu_gpr[a->rs1]);
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return true;
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}
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