88 lines
2.5 KiB
PHP
88 lines
2.5 KiB
PHP
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/*
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* Power ISA decode for Storage Control instructions
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*
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* Copyright (c) 2022 Instituto de Pesquisas Eldorado (eldorado.org.br)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Store Control Instructions
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*/
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static bool do_tlbie(DisasContext *ctx, arg_X_tlbie *a, bool local)
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{
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#if defined(CONFIG_USER_ONLY)
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gen_priv_exception(ctx, POWERPC_EXCP_PRIV_OPC);
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return true;
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#else
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TCGv_i32 t1;
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int rb;
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rb = a->rb;
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if ((ctx->insns_flags2 & PPC2_ISA300) == 0) {
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/*
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* Before Power ISA 3.0, the corresponding bits of RIC, PRS, and R
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* (and RS for tlbiel) were reserved fields and should be ignored.
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*/
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a->ric = 0;
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a->prs = false;
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a->r = false;
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if (local) {
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a->rs = 0;
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}
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}
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if (ctx->pr) {
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/* tlbie[l] is privileged... */
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gen_priv_exception(ctx, POWERPC_EXCP_PRIV_OPC);
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return true;
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} else if (!ctx->hv) {
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if ((!a->prs && ctx->hr) || (!local && !ctx->gtse)) {
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/*
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* ... except when PRS=0 and HR=1, or when GTSE=0 for tlbie,
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* making it hypervisor privileged.
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*/
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gen_priv_exception(ctx, POWERPC_EXCP_PRIV_OPC);
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return true;
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}
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}
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if (!local && NARROW_MODE(ctx)) {
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TCGv t0 = tcg_temp_new();
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tcg_gen_ext32u_tl(t0, cpu_gpr[rb]);
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gen_helper_tlbie(cpu_env, t0);
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tcg_temp_free(t0);
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} else {
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gen_helper_tlbie(cpu_env, cpu_gpr[rb]);
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}
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if (local) {
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return true;
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}
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t1 = tcg_temp_new_i32();
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tcg_gen_ld_i32(t1, cpu_env, offsetof(CPUPPCState, tlb_need_flush));
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tcg_gen_ori_i32(t1, t1, TLB_NEED_GLOBAL_FLUSH);
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tcg_gen_st_i32(t1, cpu_env, offsetof(CPUPPCState, tlb_need_flush));
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tcg_temp_free_i32(t1);
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return true;
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#endif
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}
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TRANS_FLAGS(MEM_TLBIE, TLBIE, do_tlbie, false)
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TRANS_FLAGS(MEM_TLBIE, TLBIEL, do_tlbie, true)
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