diff options
Diffstat (limited to 'target/loongarch/tcg/insn_trans/trans_privileged.c.inc')
| -rw-r--r-- | target/loongarch/tcg/insn_trans/trans_privileged.c.inc | 498 |
1 files changed, 498 insertions, 0 deletions
diff --git a/target/loongarch/tcg/insn_trans/trans_privileged.c.inc b/target/loongarch/tcg/insn_trans/trans_privileged.c.inc new file mode 100644 index 0000000000..01d457212b --- /dev/null +++ b/target/loongarch/tcg/insn_trans/trans_privileged.c.inc @@ -0,0 +1,498 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * LoongArch translation routines for the privileged instructions. + */ + +#include "cpu-csr.h" + +#ifdef CONFIG_USER_ONLY + +#define GEN_FALSE_TRANS(name) \ +static bool trans_##name(DisasContext *ctx, arg_##name * a) \ +{ \ + return false; \ +} + +GEN_FALSE_TRANS(csrrd) +GEN_FALSE_TRANS(csrwr) +GEN_FALSE_TRANS(csrxchg) +GEN_FALSE_TRANS(iocsrrd_b) +GEN_FALSE_TRANS(iocsrrd_h) +GEN_FALSE_TRANS(iocsrrd_w) +GEN_FALSE_TRANS(iocsrrd_d) +GEN_FALSE_TRANS(iocsrwr_b) +GEN_FALSE_TRANS(iocsrwr_h) +GEN_FALSE_TRANS(iocsrwr_w) +GEN_FALSE_TRANS(iocsrwr_d) +GEN_FALSE_TRANS(tlbsrch) +GEN_FALSE_TRANS(tlbrd) +GEN_FALSE_TRANS(tlbwr) +GEN_FALSE_TRANS(tlbfill) +GEN_FALSE_TRANS(tlbclr) +GEN_FALSE_TRANS(tlbflush) +GEN_FALSE_TRANS(invtlb) +GEN_FALSE_TRANS(cacop) +GEN_FALSE_TRANS(ldpte) +GEN_FALSE_TRANS(lddir) +GEN_FALSE_TRANS(ertn) +GEN_FALSE_TRANS(dbcl) +GEN_FALSE_TRANS(idle) + +#else + +typedef void (*GenCSRRead)(TCGv dest, TCGv_ptr env); +typedef void (*GenCSRWrite)(TCGv dest, TCGv_ptr env, TCGv src); + +typedef struct { + int offset; + int flags; + GenCSRRead readfn; + GenCSRWrite writefn; +} CSRInfo; + +enum { + CSRFL_READONLY = (1 << 0), + CSRFL_EXITTB = (1 << 1), + CSRFL_IO = (1 << 2), +}; + +#define CSR_OFF_FUNCS(NAME, FL, RD, WR) \ + [LOONGARCH_CSR_##NAME] = { \ + .offset = offsetof(CPULoongArchState, CSR_##NAME), \ + .flags = FL, .readfn = RD, .writefn = WR \ + } + +#define CSR_OFF_ARRAY(NAME, N) \ + [LOONGARCH_CSR_##NAME(N)] = { \ + .offset = offsetof(CPULoongArchState, CSR_##NAME[N]), \ + .flags = 0, .readfn = NULL, .writefn = NULL \ + } + +#define CSR_OFF_FLAGS(NAME, FL) \ + CSR_OFF_FUNCS(NAME, FL, NULL, NULL) + +#define CSR_OFF(NAME) \ + CSR_OFF_FLAGS(NAME, 0) + +static const CSRInfo csr_info[] = { + CSR_OFF_FLAGS(CRMD, CSRFL_EXITTB), + CSR_OFF(PRMD), + CSR_OFF_FLAGS(EUEN, CSRFL_EXITTB), + CSR_OFF_FLAGS(MISC, CSRFL_READONLY), + CSR_OFF(ECFG), + CSR_OFF_FUNCS(ESTAT, CSRFL_EXITTB, NULL, gen_helper_csrwr_estat), + CSR_OFF(ERA), + CSR_OFF(BADV), + CSR_OFF_FLAGS(BADI, CSRFL_READONLY), + CSR_OFF(EENTRY), + CSR_OFF(TLBIDX), + CSR_OFF(TLBEHI), + CSR_OFF(TLBELO0), + CSR_OFF(TLBELO1), + CSR_OFF_FUNCS(ASID, CSRFL_EXITTB, NULL, gen_helper_csrwr_asid), + CSR_OFF(PGDL), + CSR_OFF(PGDH), + CSR_OFF_FUNCS(PGD, CSRFL_READONLY, gen_helper_csrrd_pgd, NULL), + CSR_OFF(PWCL), + CSR_OFF(PWCH), + CSR_OFF(STLBPS), + CSR_OFF(RVACFG), + CSR_OFF_FUNCS(CPUID, CSRFL_READONLY, gen_helper_csrrd_cpuid, NULL), + CSR_OFF_FLAGS(PRCFG1, CSRFL_READONLY), + CSR_OFF_FLAGS(PRCFG2, CSRFL_READONLY), + CSR_OFF_FLAGS(PRCFG3, CSRFL_READONLY), + CSR_OFF_ARRAY(SAVE, 0), + CSR_OFF_ARRAY(SAVE, 1), + CSR_OFF_ARRAY(SAVE, 2), + CSR_OFF_ARRAY(SAVE, 3), + CSR_OFF_ARRAY(SAVE, 4), + CSR_OFF_ARRAY(SAVE, 5), + CSR_OFF_ARRAY(SAVE, 6), + CSR_OFF_ARRAY(SAVE, 7), + CSR_OFF_ARRAY(SAVE, 8), + CSR_OFF_ARRAY(SAVE, 9), + CSR_OFF_ARRAY(SAVE, 10), + CSR_OFF_ARRAY(SAVE, 11), + CSR_OFF_ARRAY(SAVE, 12), + CSR_OFF_ARRAY(SAVE, 13), + CSR_OFF_ARRAY(SAVE, 14), + CSR_OFF_ARRAY(SAVE, 15), + CSR_OFF(TID), + CSR_OFF_FUNCS(TCFG, CSRFL_IO, NULL, gen_helper_csrwr_tcfg), + CSR_OFF_FUNCS(TVAL, CSRFL_READONLY | CSRFL_IO, gen_helper_csrrd_tval, NULL), + CSR_OFF(CNTC), + CSR_OFF_FUNCS(TICLR, CSRFL_IO, NULL, gen_helper_csrwr_ticlr), + CSR_OFF(LLBCTL), + CSR_OFF(IMPCTL1), + CSR_OFF(IMPCTL2), + CSR_OFF(TLBRENTRY), + CSR_OFF(TLBRBADV), + CSR_OFF(TLBRERA), + CSR_OFF(TLBRSAVE), + CSR_OFF(TLBRELO0), + CSR_OFF(TLBRELO1), + CSR_OFF(TLBREHI), + CSR_OFF(TLBRPRMD), + CSR_OFF(MERRCTL), + CSR_OFF(MERRINFO1), + CSR_OFF(MERRINFO2), + CSR_OFF(MERRENTRY), + CSR_OFF(MERRERA), + CSR_OFF(MERRSAVE), + CSR_OFF(CTAG), + CSR_OFF_ARRAY(DMW, 0), + CSR_OFF_ARRAY(DMW, 1), + CSR_OFF_ARRAY(DMW, 2), + CSR_OFF_ARRAY(DMW, 3), + CSR_OFF(DBG), + CSR_OFF(DERA), + CSR_OFF(DSAVE), +}; + +static bool check_plv(DisasContext *ctx) +{ + if (ctx->plv == MMU_PLV_USER) { + generate_exception(ctx, EXCCODE_IPE); + return true; + } + return false; +} + +static const CSRInfo *get_csr(unsigned csr_num) +{ + const CSRInfo *csr; + + if (csr_num >= ARRAY_SIZE(csr_info)) { + return NULL; + } + csr = &csr_info[csr_num]; + if (csr->offset == 0) { + return NULL; + } + return csr; +} + +static bool check_csr_flags(DisasContext *ctx, const CSRInfo *csr, bool write) +{ + if ((csr->flags & CSRFL_READONLY) && write) { + return false; + } + if ((csr->flags & CSRFL_IO) && translator_io_start(&ctx->base)) { + ctx->base.is_jmp = DISAS_EXIT_UPDATE; + } else if ((csr->flags & CSRFL_EXITTB) && write) { + ctx->base.is_jmp = DISAS_EXIT_UPDATE; + } + return true; +} + +static bool trans_csrrd(DisasContext *ctx, arg_csrrd *a) +{ + TCGv dest; + const CSRInfo *csr; + + if (check_plv(ctx)) { + return false; + } + csr = get_csr(a->csr); + if (csr == NULL) { + /* CSR is undefined: read as 0. */ + dest = tcg_constant_tl(0); + } else { + check_csr_flags(ctx, csr, false); + dest = gpr_dst(ctx, a->rd, EXT_NONE); + if (csr->readfn) { + csr->readfn(dest, tcg_env); + } else { + tcg_gen_ld_tl(dest, tcg_env, csr->offset); + } + } + gen_set_gpr(a->rd, dest, EXT_NONE); + return true; +} + +static bool trans_csrwr(DisasContext *ctx, arg_csrwr *a) +{ + TCGv dest, src1; + const CSRInfo *csr; + + if (check_plv(ctx)) { + return false; + } + csr = get_csr(a->csr); + if (csr == NULL) { + /* CSR is undefined: write ignored, read old_value as 0. */ + gen_set_gpr(a->rd, tcg_constant_tl(0), EXT_NONE); + return true; + } + if (!check_csr_flags(ctx, csr, true)) { + /* CSR is readonly: trap. */ + return false; + } + src1 = gpr_src(ctx, a->rd, EXT_NONE); + if (csr->writefn) { + dest = gpr_dst(ctx, a->rd, EXT_NONE); + csr->writefn(dest, tcg_env, src1); + } else { + dest = tcg_temp_new(); + tcg_gen_ld_tl(dest, tcg_env, csr->offset); + tcg_gen_st_tl(src1, tcg_env, csr->offset); + } + gen_set_gpr(a->rd, dest, EXT_NONE); + return true; +} + +static bool trans_csrxchg(DisasContext *ctx, arg_csrxchg *a) +{ + TCGv src1, mask, oldv, newv, temp; + const CSRInfo *csr; + + if (check_plv(ctx)) { + return false; + } + csr = get_csr(a->csr); + if (csr == NULL) { + /* CSR is undefined: write ignored, read old_value as 0. */ + gen_set_gpr(a->rd, tcg_constant_tl(0), EXT_NONE); + return true; + } + + if (!check_csr_flags(ctx, csr, true)) { + /* CSR is readonly: trap. */ + return false; + } + + /* So far only readonly csrs have readfn. */ + assert(csr->readfn == NULL); + + src1 = gpr_src(ctx, a->rd, EXT_NONE); + mask = gpr_src(ctx, a->rj, EXT_NONE); + oldv = tcg_temp_new(); + newv = tcg_temp_new(); + temp = tcg_temp_new(); + + tcg_gen_ld_tl(oldv, tcg_env, csr->offset); + tcg_gen_and_tl(newv, src1, mask); + tcg_gen_andc_tl(temp, oldv, mask); + tcg_gen_or_tl(newv, newv, temp); + + if (csr->writefn) { + csr->writefn(oldv, tcg_env, newv); + } else { + tcg_gen_st_tl(newv, tcg_env, csr->offset); + } + gen_set_gpr(a->rd, oldv, EXT_NONE); + return true; +} + +static bool gen_iocsrrd(DisasContext *ctx, arg_rr *a, + void (*func)(TCGv, TCGv_ptr, TCGv)) +{ + TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE); + TCGv src1 = gpr_src(ctx, a->rj, EXT_NONE); + + if (check_plv(ctx)) { + return false; + } + func(dest, tcg_env, src1); + return true; +} + +static bool gen_iocsrwr(DisasContext *ctx, arg_rr *a, + void (*func)(TCGv_ptr, TCGv, TCGv)) +{ + TCGv val = gpr_src(ctx, a->rd, EXT_NONE); + TCGv addr = gpr_src(ctx, a->rj, EXT_NONE); + + if (check_plv(ctx)) { + return false; + } + func(tcg_env, addr, val); + return true; +} + +TRANS(iocsrrd_b, IOCSR, gen_iocsrrd, gen_helper_iocsrrd_b) +TRANS(iocsrrd_h, IOCSR, gen_iocsrrd, gen_helper_iocsrrd_h) +TRANS(iocsrrd_w, IOCSR, gen_iocsrrd, gen_helper_iocsrrd_w) +TRANS(iocsrrd_d, IOCSR, gen_iocsrrd, gen_helper_iocsrrd_d) +TRANS(iocsrwr_b, IOCSR, gen_iocsrwr, gen_helper_iocsrwr_b) +TRANS(iocsrwr_h, IOCSR, gen_iocsrwr, gen_helper_iocsrwr_h) +TRANS(iocsrwr_w, IOCSR, gen_iocsrwr, gen_helper_iocsrwr_w) +TRANS(iocsrwr_d, IOCSR, gen_iocsrwr, gen_helper_iocsrwr_d) + +static void check_mmu_idx(DisasContext *ctx) +{ + if (ctx->mem_idx != MMU_IDX_DA) { + tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next + 4); + ctx->base.is_jmp = DISAS_EXIT; + } +} + +static bool trans_tlbsrch(DisasContext *ctx, arg_tlbsrch *a) +{ + if (check_plv(ctx)) { + return false; + } + gen_helper_tlbsrch(tcg_env); + return true; +} + +static bool trans_tlbrd(DisasContext *ctx, arg_tlbrd *a) +{ + if (check_plv(ctx)) { + return false; + } + gen_helper_tlbrd(tcg_env); + return true; +} + +static bool trans_tlbwr(DisasContext *ctx, arg_tlbwr *a) +{ + if (check_plv(ctx)) { + return false; + } + gen_helper_tlbwr(tcg_env); + check_mmu_idx(ctx); + return true; +} + +static bool trans_tlbfill(DisasContext *ctx, arg_tlbfill *a) +{ + if (check_plv(ctx)) { + return false; + } + gen_helper_tlbfill(tcg_env); + check_mmu_idx(ctx); + return true; +} + +static bool trans_tlbclr(DisasContext *ctx, arg_tlbclr *a) +{ + if (check_plv(ctx)) { + return false; + } + gen_helper_tlbclr(tcg_env); + check_mmu_idx(ctx); + return true; +} + +static bool trans_tlbflush(DisasContext *ctx, arg_tlbflush *a) +{ + if (check_plv(ctx)) { + return false; + } + gen_helper_tlbflush(tcg_env); + check_mmu_idx(ctx); + return true; +} + +static bool trans_invtlb(DisasContext *ctx, arg_invtlb *a) +{ + TCGv rj = gpr_src(ctx, a->rj, EXT_NONE); + TCGv rk = gpr_src(ctx, a->rk, EXT_NONE); + + if (check_plv(ctx)) { + return false; + } + + switch (a->imm) { + case 0: + case 1: + gen_helper_invtlb_all(tcg_env); + break; + case 2: + gen_helper_invtlb_all_g(tcg_env, tcg_constant_i32(1)); + break; + case 3: + gen_helper_invtlb_all_g(tcg_env, tcg_constant_i32(0)); + break; + case 4: + gen_helper_invtlb_all_asid(tcg_env, rj); + break; + case 5: + gen_helper_invtlb_page_asid(tcg_env, rj, rk); + break; + case 6: + gen_helper_invtlb_page_asid_or_g(tcg_env, rj, rk); + break; + default: + return false; + } + ctx->base.is_jmp = DISAS_STOP; + return true; +} + +static bool trans_cacop(DisasContext *ctx, arg_cacop *a) +{ + /* Treat the cacop as a nop */ + if (check_plv(ctx)) { + return false; + } + return true; +} + +static bool trans_ldpte(DisasContext *ctx, arg_ldpte *a) +{ + TCGv_i32 mem_idx = tcg_constant_i32(ctx->mem_idx); + TCGv src1 = gpr_src(ctx, a->rj, EXT_NONE); + + if (!avail_LSPW(ctx)) { + return true; + } + + if (check_plv(ctx)) { + return false; + } + gen_helper_ldpte(tcg_env, src1, tcg_constant_tl(a->imm), mem_idx); + return true; +} + +static bool trans_lddir(DisasContext *ctx, arg_lddir *a) +{ + TCGv_i32 mem_idx = tcg_constant_i32(ctx->mem_idx); + TCGv src = gpr_src(ctx, a->rj, EXT_NONE); + TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE); + + if (!avail_LSPW(ctx)) { + return true; + } + + if (check_plv(ctx)) { + return false; + } + gen_helper_lddir(dest, tcg_env, src, tcg_constant_tl(a->imm), mem_idx); + return true; +} + +static bool trans_ertn(DisasContext *ctx, arg_ertn *a) +{ + if (check_plv(ctx)) { + return false; + } + gen_helper_ertn(tcg_env); + ctx->base.is_jmp = DISAS_EXIT; + return true; +} + +static bool trans_dbcl(DisasContext *ctx, arg_dbcl *a) +{ + if (check_plv(ctx)) { + return false; + } + generate_exception(ctx, EXCCODE_DBP); + return true; +} + +static bool trans_idle(DisasContext *ctx, arg_idle *a) +{ + if (check_plv(ctx)) { + return false; + } + + tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next + 4); + gen_helper_idle(tcg_env); + ctx->base.is_jmp = DISAS_NORETURN; + return true; +} +#endif |