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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.220.180.131; envelope-from=brian.cain@oss.qualcomm.com; helo=mx0b-0031df01.pphosted.com X-Spam_score_int: -7 X-Spam_score: -0.8 X-Spam_bar: / X-Spam_report: (-0.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=1, RCVD_IN_VALIDITY_RPBL_BLOCKED=1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @qualcomm.com) X-ZM-MESSAGEID: 1775057493562158501 From: Brian Cain This commit provides handlers to generate TCG for guest and system register reads and writes. They will be leveraged by a future commit. Reviewed-by: Taylor Simpson Signed-off-by: Brian Cain --- target/hexagon/genptr.c | 147 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 147 insertions(+) diff --git a/target/hexagon/genptr.c b/target/hexagon/genptr.c index c7b9436c8d4..d71fa578b6f 100644 --- a/target/hexagon/genptr.c +++ b/target/hexagon/genptr.c @@ -23,6 +23,7 @@ #include "exec/helper-gen.h" #include "insn.h" #include "opcodes.h" +#include "sys_macros.h" #include "translate.h" #define QEMU_GENERATE /* Used internally by macros.h */ #include "macros.h" @@ -120,6 +121,152 @@ TCGv get_result_pred(DisasContext *ctx, int pnum) } } =20 +#ifndef CONFIG_USER_ONLY +G_GNUC_UNUSED +static bool greg_writable(int rnum, bool pair) +{ + if (pair) { + if (rnum < HEX_GREG_G3) { + return true; + } + qemu_log_mask(LOG_UNIMP, + "Warning: ignoring write to guest register pair G%d:%d\n", + rnum + 1, rnum); + } else { + if (rnum <=3D HEX_GREG_G3) { + return true; + } + qemu_log_mask(LOG_UNIMP, + "Warning: ignoring write to guest register G%d\n", rnum); + } + return false; +} + +G_GNUC_UNUSED +static void check_greg_impl(int rnum, bool pair) +{ + if (pair && (!greg_implemented(rnum) || !greg_implemented(rnum + 1))) { + qemu_log_mask(LOG_UNIMP, + "Warning: guest register pair G%d:%d is unimplemented or " + "reserved. Read will yield 0.\n", + rnum + 1, rnum); + } else if (!pair && !greg_implemented(rnum)) { + qemu_log_mask(LOG_UNIMP, + "Warning: guest register G%d is unimplemented or reserved." + " Read will yield 0.\n", rnum); + } +} + +G_GNUC_UNUSED +static inline void gen_log_greg_write(DisasContext *ctx, int rnum, TCGv_i3= 2 val) +{ + tcg_gen_mov_i32(ctx->greg_new_value[rnum], val); +} + +G_GNUC_UNUSED +static void gen_log_greg_write_pair(DisasContext *ctx, int rnum, TCGv_i64 = val) +{ + TCGv_i32 val32 =3D tcg_temp_new_i32(); + + /* Low word */ + tcg_gen_extrl_i64_i32(val32, val); + gen_log_greg_write(ctx, rnum, val32); + + /* High word */ + tcg_gen_extrh_i64_i32(val32, val); + gen_log_greg_write(ctx, rnum + 1, val32); +} + +static const uint32_t sreg_immut_masks[NUM_SREGS] =3D { + [HEX_SREG_STID] =3D 0xff00ff00, + [HEX_SREG_ELR] =3D 0x00000003, + [HEX_SREG_SSR] =3D 0x00008000, + [HEX_SREG_CCR] =3D 0x10e0ff24, + [HEX_SREG_HTID] =3D IMMUTABLE, + [HEX_SREG_IMASK] =3D 0xffff0000, + [HEX_SREG_GEVB] =3D 0x000000ff, +}; + +G_GNUC_UNUSED +static void gen_log_sreg_write(DisasContext *ctx, int rnum, TCGv_i32 val) +{ + const uint32_t reg_mask =3D sreg_immut_masks[rnum]; + + if (reg_mask !=3D IMMUTABLE) { + if (rnum < HEX_SREG_GLB_START) { + gen_masked_reg_write(val, hex_t_sreg[rnum], reg_mask); + tcg_gen_mov_i32(ctx->t_sreg_new_value[rnum], val); + } else { + gen_helper_sreg_write_masked(tcg_env, tcg_constant_i32(rnum), = val); + } + } +} + +G_GNUC_UNUSED +static void gen_log_sreg_write_pair(DisasContext *ctx, int rnum, TCGv_i64 = val) +{ + TCGv_i32 val32 =3D tcg_temp_new_i32(); + + /* Low word */ + tcg_gen_extrl_i64_i32(val32, val); + gen_log_sreg_write(ctx, rnum, val32); + + /* High word */ + tcg_gen_extrh_i64_i32(val32, val); + gen_log_sreg_write(ctx, rnum + 1, val32); +} + +G_GNUC_UNUSED +static void gen_read_sreg(TCGv_i32 dst, int reg_num) +{ + if (reg_num >=3D HEX_SREG_GLB_START || reg_num =3D=3D HEX_SREG_BADVA) { + gen_helper_sreg_read(dst, tcg_env, tcg_constant_i32(reg_num)); + } else { + tcg_gen_mov_i32(dst, hex_t_sreg[reg_num]); + } +} + +G_GNUC_UNUSED +static void gen_read_sreg_pair(TCGv_i64 dst, int reg_num) +{ + if (reg_num < HEX_SREG_GLB_START) { + if (reg_num + 1 =3D=3D HEX_SREG_BADVA) { + TCGv_i32 badva =3D tcg_temp_new_i32(); + gen_helper_sreg_read(badva, tcg_env, + tcg_constant_i32(HEX_SREG_BADVA)); + tcg_gen_concat_i32_i64(dst, hex_t_sreg[reg_num], badva); + } else { + tcg_gen_concat_i32_i64(dst, hex_t_sreg[reg_num], + hex_t_sreg[reg_num + 1]); + } + } else { + gen_helper_sreg_read_pair(dst, tcg_env, tcg_constant_i32(reg_num)); + } +} + +G_GNUC_UNUSED +static void gen_read_greg(TCGv_i32 dst, int reg_num) +{ + if (reg_num <=3D HEX_GREG_G3) { + tcg_gen_mov_i32(dst, hex_greg[reg_num]); + } else { + gen_helper_greg_read(dst, tcg_env, tcg_constant_i32(reg_num)); + } +} + +G_GNUC_UNUSED +static void gen_read_greg_pair(TCGv_i64 dst, int reg_num) +{ + if (reg_num =3D=3D HEX_GREG_G0 || reg_num =3D=3D HEX_GREG_G2) { + tcg_gen_concat_i32_i64(dst, hex_greg[reg_num], + hex_greg[reg_num + 1]); + } else { + gen_helper_greg_read_pair(dst, tcg_env, tcg_constant_i32(reg_num)); + } +} +#endif + + void gen_pred_write(DisasContext *ctx, int pnum, TCGv val) { TCGv pred =3D get_result_pred(ctx, pnum); --=20 2.34.1