| /* |
| * MIPS emulation helpers for qemu. |
| * |
| * Copyright (c) 2004-2005 Jocelyn Mayer |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "cpu.h" |
| #include "internal.h" |
| #include "exec/helper-proto.h" |
| #include "exec/exec-all.h" |
| #include "exec/memop.h" |
| #include "fpu_helper.h" |
| |
| static inline target_ulong bitswap(target_ulong v) |
| { |
| v = ((v >> 1) & (target_ulong)0x5555555555555555ULL) | |
| ((v & (target_ulong)0x5555555555555555ULL) << 1); |
| v = ((v >> 2) & (target_ulong)0x3333333333333333ULL) | |
| ((v & (target_ulong)0x3333333333333333ULL) << 2); |
| v = ((v >> 4) & (target_ulong)0x0F0F0F0F0F0F0F0FULL) | |
| ((v & (target_ulong)0x0F0F0F0F0F0F0F0FULL) << 4); |
| return v; |
| } |
| |
| #ifdef TARGET_MIPS64 |
| target_ulong helper_dbitswap(target_ulong rt) |
| { |
| return bitswap(rt); |
| } |
| #endif |
| |
| target_ulong helper_bitswap(target_ulong rt) |
| { |
| return (int32_t)bitswap(rt); |
| } |
| |
| target_ulong helper_rotx(target_ulong rs, uint32_t shift, uint32_t shiftx, |
| uint32_t stripe) |
| { |
| int i; |
| uint64_t tmp0 = ((uint64_t)rs) << 32 | ((uint64_t)rs & 0xffffffff); |
| uint64_t tmp1 = tmp0; |
| for (i = 0; i <= 46; i++) { |
| int s; |
| if (i & 0x8) { |
| s = shift; |
| } else { |
| s = shiftx; |
| } |
| |
| if (stripe != 0 && !(i & 0x4)) { |
| s = ~s; |
| } |
| if (s & 0x10) { |
| if (tmp0 & (1LL << (i + 16))) { |
| tmp1 |= 1LL << i; |
| } else { |
| tmp1 &= ~(1LL << i); |
| } |
| } |
| } |
| |
| uint64_t tmp2 = tmp1; |
| for (i = 0; i <= 38; i++) { |
| int s; |
| if (i & 0x4) { |
| s = shift; |
| } else { |
| s = shiftx; |
| } |
| |
| if (s & 0x8) { |
| if (tmp1 & (1LL << (i + 8))) { |
| tmp2 |= 1LL << i; |
| } else { |
| tmp2 &= ~(1LL << i); |
| } |
| } |
| } |
| |
| uint64_t tmp3 = tmp2; |
| for (i = 0; i <= 34; i++) { |
| int s; |
| if (i & 0x2) { |
| s = shift; |
| } else { |
| s = shiftx; |
| } |
| if (s & 0x4) { |
| if (tmp2 & (1LL << (i + 4))) { |
| tmp3 |= 1LL << i; |
| } else { |
| tmp3 &= ~(1LL << i); |
| } |
| } |
| } |
| |
| uint64_t tmp4 = tmp3; |
| for (i = 0; i <= 32; i++) { |
| int s; |
| if (i & 0x1) { |
| s = shift; |
| } else { |
| s = shiftx; |
| } |
| if (s & 0x2) { |
| if (tmp3 & (1LL << (i + 2))) { |
| tmp4 |= 1LL << i; |
| } else { |
| tmp4 &= ~(1LL << i); |
| } |
| } |
| } |
| |
| uint64_t tmp5 = tmp4; |
| for (i = 0; i <= 31; i++) { |
| int s; |
| s = shift; |
| if (s & 0x1) { |
| if (tmp4 & (1LL << (i + 1))) { |
| tmp5 |= 1LL << i; |
| } else { |
| tmp5 &= ~(1LL << i); |
| } |
| } |
| } |
| |
| return (int64_t)(int32_t)(uint32_t)tmp5; |
| } |
| |
| void helper_fork(target_ulong arg1, target_ulong arg2) |
| { |
| /* |
| * arg1 = rt, arg2 = rs |
| * TODO: store to TC register |
| */ |
| } |
| |
| target_ulong helper_yield(CPUMIPSState *env, target_ulong arg) |
| { |
| target_long arg1 = arg; |
| |
| if (arg1 < 0) { |
| /* No scheduling policy implemented. */ |
| if (arg1 != -2) { |
| if (env->CP0_VPEControl & (1 << CP0VPECo_YSI) && |
| env->active_tc.CP0_TCStatus & (1 << CP0TCSt_DT)) { |
| env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT); |
| env->CP0_VPEControl |= 4 << CP0VPECo_EXCPT; |
| do_raise_exception(env, EXCP_THREAD, GETPC()); |
| } |
| } |
| } else if (arg1 == 0) { |
| if (0) { |
| /* TODO: TC underflow */ |
| env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT); |
| do_raise_exception(env, EXCP_THREAD, GETPC()); |
| } else { |
| /* TODO: Deallocate TC */ |
| } |
| } else if (arg1 > 0) { |
| /* Yield qualifier inputs not implemented. */ |
| env->CP0_VPEControl &= ~(0x7 << CP0VPECo_EXCPT); |
| env->CP0_VPEControl |= 2 << CP0VPECo_EXCPT; |
| do_raise_exception(env, EXCP_THREAD, GETPC()); |
| } |
| return env->CP0_YQMask; |
| } |
| |
| static inline void check_hwrena(CPUMIPSState *env, int reg, uintptr_t pc) |
| { |
| if ((env->hflags & MIPS_HFLAG_CP0) || (env->CP0_HWREna & (1 << reg))) { |
| return; |
| } |
| do_raise_exception(env, EXCP_RI, pc); |
| } |
| |
| target_ulong helper_rdhwr_cpunum(CPUMIPSState *env) |
| { |
| check_hwrena(env, 0, GETPC()); |
| return env->CP0_EBase & 0x3ff; |
| } |
| |
| target_ulong helper_rdhwr_synci_step(CPUMIPSState *env) |
| { |
| check_hwrena(env, 1, GETPC()); |
| return env->SYNCI_Step; |
| } |
| |
| target_ulong helper_rdhwr_cc(CPUMIPSState *env) |
| { |
| check_hwrena(env, 2, GETPC()); |
| #ifdef CONFIG_USER_ONLY |
| return env->CP0_Count; |
| #else |
| return (int32_t)cpu_mips_get_count(env); |
| #endif |
| } |
| |
| target_ulong helper_rdhwr_ccres(CPUMIPSState *env) |
| { |
| check_hwrena(env, 3, GETPC()); |
| return env->CCRes; |
| } |
| |
| target_ulong helper_rdhwr_performance(CPUMIPSState *env) |
| { |
| check_hwrena(env, 4, GETPC()); |
| return env->CP0_Performance0; |
| } |
| |
| target_ulong helper_rdhwr_xnp(CPUMIPSState *env) |
| { |
| check_hwrena(env, 5, GETPC()); |
| return (env->CP0_Config5 >> CP0C5_XNP) & 1; |
| } |
| |
| void helper_pmon(CPUMIPSState *env, int function) |
| { |
| function /= 2; |
| switch (function) { |
| case 2: /* TODO: char inbyte(int waitflag); */ |
| if (env->active_tc.gpr[4] == 0) { |
| env->active_tc.gpr[2] = -1; |
| } |
| /* Fall through */ |
| case 11: /* TODO: char inbyte (void); */ |
| env->active_tc.gpr[2] = -1; |
| break; |
| case 3: |
| case 12: |
| printf("%c", (char)(env->active_tc.gpr[4] & 0xFF)); |
| break; |
| case 17: |
| break; |
| case 158: |
| { |
| unsigned char *fmt = (void *)(uintptr_t)env->active_tc.gpr[4]; |
| printf("%s", fmt); |
| } |
| break; |
| } |
| } |
| |
| #ifdef TARGET_MIPS64 |
| target_ulong helper_lcsr_cpucfg(CPUMIPSState *env, target_ulong rs) |
| { |
| switch (rs) { |
| case 0: |
| return env->CP0_PRid; |
| case 1: |
| return env->lcsr_cpucfg1; |
| case 2: |
| return env->lcsr_cpucfg2; |
| default: |
| return 0; |
| } |
| } |
| #endif |
| |
| #if !defined(CONFIG_USER_ONLY) |
| |
| void mips_cpu_do_unaligned_access(CPUState *cs, vaddr addr, |
| MMUAccessType access_type, |
| int mmu_idx, uintptr_t retaddr) |
| { |
| CPUMIPSState *env = cpu_env(cs); |
| int error_code = 0; |
| int excp; |
| |
| if (!(env->hflags & MIPS_HFLAG_DM)) { |
| env->CP0_BadVAddr = addr; |
| } |
| |
| if (access_type == MMU_DATA_STORE) { |
| excp = EXCP_AdES; |
| } else { |
| excp = EXCP_AdEL; |
| if (access_type == MMU_INST_FETCH) { |
| error_code |= EXCP_INST_NOTAVAIL; |
| } |
| } |
| |
| do_raise_exception_err(env, excp, error_code, retaddr); |
| } |
| |
| void mips_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, |
| vaddr addr, unsigned size, |
| MMUAccessType access_type, |
| int mmu_idx, MemTxAttrs attrs, |
| MemTxResult response, uintptr_t retaddr) |
| { |
| MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(cs); |
| CPUMIPSState *env = cpu_env(cs); |
| |
| if (access_type == MMU_INST_FETCH) { |
| do_raise_exception(env, EXCP_IBE, retaddr); |
| } else if (!mcc->no_data_aborts) { |
| do_raise_exception(env, EXCP_DBE, retaddr); |
| } |
| } |
| #endif /* !CONFIG_USER_ONLY */ |
