1 /* 2 * Loongson CSR instructions translation routines 3 * 4 * Copyright (c) 2023 Jiaxun Yang <jiaxun.yang@flygoat.com> 5 * 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #include "qemu/osdep.h" 10 #include "cpu.h" 11 #include "tcg/tcg-op.h" 12 #include "tcg/tcg-op-gvec.h" 13 #include "exec/helper-gen.h" 14 #include "translate.h" 15 16 /* Include the auto-generated decoder. */ 17 #include "decode-lcsr.c.inc" 18 19 static bool trans_CPUCFG(DisasContext *ctx, arg_CPUCFG *a) 20 { 21 TCGv dest = tcg_temp_new(); 22 TCGv src1 = tcg_temp_new(); 23 24 gen_load_gpr(src1, a->rs); 25 gen_helper_lcsr_cpucfg(dest, tcg_env, src1); 26 gen_store_gpr(dest, a->rd); 27 28 return true; 29 } 30 31 #ifndef CONFIG_USER_ONLY 32 static bool gen_rdcsr(DisasContext *ctx, arg_r *a, 33 void (*func)(TCGv, TCGv_ptr, TCGv)) 34 { 35 TCGv dest = tcg_temp_new(); 36 TCGv src1 = tcg_temp_new(); 37 38 check_cp0_enabled(ctx); 39 gen_load_gpr(src1, a->rs); 40 func(dest, tcg_env, src1); 41 gen_store_gpr(dest, a->rd); 42 43 return true; 44 } 45 46 static bool gen_wrcsr(DisasContext *ctx, arg_r *a, 47 void (*func)(TCGv_ptr, TCGv, TCGv)) 48 { 49 TCGv val = tcg_temp_new(); 50 TCGv addr = tcg_temp_new(); 51 52 check_cp0_enabled(ctx); 53 gen_load_gpr(addr, a->rs); 54 gen_load_gpr(val, a->rd); 55 func(tcg_env, addr, val); 56 57 return true; 58 } 59 60 TRANS(RDCSR, gen_rdcsr, gen_helper_lcsr_rdcsr) 61 TRANS(DRDCSR, gen_rdcsr, gen_helper_lcsr_drdcsr) 62 TRANS(WRCSR, gen_wrcsr, gen_helper_lcsr_wrcsr) 63 TRANS(DWRCSR, gen_wrcsr, gen_helper_lcsr_dwrcsr) 64 #else 65 #define GEN_FALSE_TRANS(name) \ 66 static bool trans_##name(DisasContext *ctx, arg_##name * a) \ 67 { \ 68 return false; \ 69 } 70 71 GEN_FALSE_TRANS(RDCSR) 72 GEN_FALSE_TRANS(DRDCSR) 73 GEN_FALSE_TRANS(WRCSR) 74 GEN_FALSE_TRANS(DWRCSR) 75 #endif 76