diff options
Diffstat (limited to 'target-ppc/op_helper.c')
| -rw-r--r-- | target-ppc/op_helper.c | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c index d5db484b4a..e165444102 100644 --- a/target-ppc/op_helper.c +++ b/target-ppc/op_helper.c @@ -4206,4 +4206,300 @@ target_ulong helper_440_tlbsx (target_ulong address) return ppcemb_tlb_search(env, address, env->spr[SPR_440_MMUCR] & 0xFF); } +/* PowerPC BookE 2.06 TLB management */ + +static ppcemb_tlb_t *booke206_cur_tlb(CPUState *env) +{ + uint32_t tlbncfg = 0; + int esel = (env->spr[SPR_BOOKE_MAS0] & MAS0_ESEL_MASK) >> MAS0_ESEL_SHIFT; + int ea = (env->spr[SPR_BOOKE_MAS2] & MAS2_EPN_MASK); + int tlb; + + tlb = (env->spr[SPR_BOOKE_MAS0] & MAS0_TLBSEL_MASK) >> MAS0_TLBSEL_SHIFT; + tlbncfg = env->spr[SPR_BOOKE_TLB0CFG + tlb]; + + if ((tlbncfg & TLBnCFG_HES) && (env->spr[SPR_BOOKE_MAS0] & MAS0_HES)) { + cpu_abort(env, "we don't support HES yet\n"); + } + + return booke206_get_tlbe(env, tlb, ea, esel); +} + +static inline target_phys_addr_t booke206_tlb_to_page_size(int size) +{ + return (1 << (size << 1)) << 10; +} + +static inline target_phys_addr_t booke206_page_size_to_tlb(uint64_t size) +{ + return (ffs(size >> 10) - 1) >> 1; +} + +void helper_booke_setpid(uint32_t pidn, target_ulong pid) +{ + env->spr[pidn] = pid; + /* changing PIDs mean we're in a different address space now */ + tlb_flush(env, 1); +} + +void helper_booke206_tlbwe(void) +{ + uint32_t tlbncfg, tlbn; + ppcemb_tlb_t *tlb; + target_phys_addr_t rpn; + int tlbe_size; + + switch (env->spr[SPR_BOOKE_MAS0] & MAS0_WQ_MASK) { + case MAS0_WQ_ALWAYS: + /* good to go, write that entry */ + break; + case MAS0_WQ_COND: + /* XXX check if reserved */ + if (0) { + return; + } + break; + case MAS0_WQ_CLR_RSRV: + /* XXX clear entry */ + return; + default: + /* no idea what to do */ + return; + } + + if (((env->spr[SPR_BOOKE_MAS0] & MAS0_ATSEL) == MAS0_ATSEL_LRAT) && + !msr_gs) { + /* XXX we don't support direct LRAT setting yet */ + fprintf(stderr, "cpu: don't support LRAT setting yet\n"); + return; + } + + tlbn = (env->spr[SPR_BOOKE_MAS0] & MAS0_TLBSEL_MASK) >> MAS0_TLBSEL_SHIFT; + tlbncfg = env->spr[SPR_BOOKE_TLB0CFG + tlbn]; + + tlb = booke206_cur_tlb(env); + + if (msr_gs) { + cpu_abort(env, "missing HV implementation\n"); + } else { + rpn = ((uint64_t)env->spr[SPR_BOOKE_MAS7] << 32) | + (env->spr[SPR_BOOKE_MAS3] & 0xfffff000); + } + tlb->RPN = rpn; + + tlb->PID = (env->spr[SPR_BOOKE_MAS1] & MAS1_TID_MASK) >> MAS1_TID_SHIFT; + if (tlbncfg & TLBnCFG_AVAIL) { + tlbe_size = (env->spr[SPR_BOOKE_MAS1] & MAS1_TSIZE_MASK) + >> MAS1_TSIZE_SHIFT; + } else { + tlbe_size = (tlbncfg & TLBnCFG_MINSIZE) >> TLBnCFG_MINSIZE_SHIFT; + } + + tlb->size = booke206_tlb_to_page_size(tlbe_size); + tlb->EPN = (uint32_t)(env->spr[SPR_BOOKE_MAS2] & MAS2_EPN_MASK); + tlb->attr = env->spr[SPR_BOOKE_MAS2] & (MAS2_ACM | MAS2_VLE | MAS2_W | + MAS2_I | MAS2_M | MAS2_G | MAS2_E) + << 1; + + if (tlbncfg & TLBnCFG_IPROT) { + tlb->attr |= env->spr[SPR_BOOKE_MAS1] & MAS1_IPROT; + } + tlb->attr |= (env->spr[SPR_BOOKE_MAS3] & + ((MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3)) << 8); + if (env->spr[SPR_BOOKE_MAS1] & MAS1_TS) { + tlb->attr |= 1; + } + + tlb->prot = 0; + + if (env->spr[SPR_BOOKE_MAS1] & MAS1_VALID) { + tlb->prot |= PAGE_VALID; + } + if (env->spr[SPR_BOOKE_MAS3] & MAS3_UX) { + tlb->prot |= PAGE_EXEC; + } + if (env->spr[SPR_BOOKE_MAS3] & MAS3_SX) { + tlb->prot |= PAGE_EXEC << 4; + } + if (env->spr[SPR_BOOKE_MAS3] & MAS3_UW) { + tlb->prot |= PAGE_WRITE; + } + if (env->spr[SPR_BOOKE_MAS3] & MAS3_SW) { + tlb->prot |= PAGE_WRITE << 4; + } + if (env->spr[SPR_BOOKE_MAS3] & MAS3_UR) { + tlb->prot |= PAGE_READ; + } + if (env->spr[SPR_BOOKE_MAS3] & MAS3_SR) { + tlb->prot |= PAGE_READ << 4; + } + + if (tlb->size == TARGET_PAGE_SIZE) { + tlb_flush_page(env, tlb->EPN); + } else { + tlb_flush(env, 1); + } +} + +static inline void booke206_tlb_to_mas(CPUState *env, ppcemb_tlb_t *tlb) +{ + int tlbn = booke206_tlbe_to_tlbn(env, tlb); + int way = booke206_tlbe_to_way(env, tlb); + + env->spr[SPR_BOOKE_MAS0] = tlbn << MAS0_TLBSEL_SHIFT; + env->spr[SPR_BOOKE_MAS0] |= way << MAS0_ESEL_SHIFT; + + env->spr[SPR_BOOKE_MAS1] = MAS1_VALID; + env->spr[SPR_BOOKE_MAS2] = 0; + + env->spr[SPR_BOOKE_MAS7] = (uint64_t)tlb->RPN >> 32; + env->spr[SPR_BOOKE_MAS3] = tlb->RPN; + env->spr[SPR_BOOKE_MAS1] |= tlb->PID << MAS1_TID_SHIFT; + env->spr[SPR_BOOKE_MAS1] |= booke206_page_size_to_tlb(tlb->size) + << MAS1_TSIZE_SHIFT; + env->spr[SPR_BOOKE_MAS1] |= tlb->attr & MAS1_IPROT; + if (tlb->attr & 1) { + env->spr[SPR_BOOKE_MAS1] |= MAS1_TS; + } + + env->spr[SPR_BOOKE_MAS2] = tlb->EPN; + env->spr[SPR_BOOKE_MAS2] |= (tlb->attr >> 1) & + (MAS2_ACM | MAS2_VLE | MAS2_W | MAS2_I | MAS2_M | MAS2_G | MAS2_E); + + if (tlb->prot & PAGE_EXEC) { + env->spr[SPR_BOOKE_MAS3] |= MAS3_UX; + } + if (tlb->prot & (PAGE_EXEC << 4)) { + env->spr[SPR_BOOKE_MAS3] |= MAS3_SX; + } + if (tlb->prot & PAGE_WRITE) { + env->spr[SPR_BOOKE_MAS3] |= MAS3_UW; + } + if (tlb->prot & (PAGE_WRITE << 4)) { + env->spr[SPR_BOOKE_MAS3] |= MAS3_SW; + } + if (tlb->prot & PAGE_READ) { + env->spr[SPR_BOOKE_MAS3] |= MAS3_UR; + } + if (tlb->prot & (PAGE_READ << 4)) { + env->spr[SPR_BOOKE_MAS3] |= MAS3_SR; + } + + env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_NV_SHIFT; +} + +void helper_booke206_tlbre(void) +{ + ppcemb_tlb_t *tlb = NULL; + + tlb = booke206_cur_tlb(env); + booke206_tlb_to_mas(env, tlb); +} + +void helper_booke206_tlbsx(target_ulong address) +{ + ppcemb_tlb_t *tlb = NULL; + int i, j; + target_phys_addr_t raddr; + uint32_t spid, sas; + + spid = (env->spr[SPR_BOOKE_MAS6] & MAS6_SPID_MASK) >> MAS6_SPID_SHIFT; + sas = env->spr[SPR_BOOKE_MAS6] & MAS6_SAS; + + for (i = 0; i < BOOKE206_MAX_TLBN; i++) { + int ways = booke206_tlb_ways(env, i); + + for (j = 0; j < ways; j++) { + tlb = booke206_get_tlbe(env, i, address, j); + + if (ppcemb_tlb_check(env, tlb, &raddr, address, spid, 0, j)) { + continue; + } + + if (sas != (tlb->attr & MAS6_SAS)) { + continue; + } + + booke206_tlb_to_mas(env, tlb); + return; + } + } + + /* no entry found, fill with defaults */ + env->spr[SPR_BOOKE_MAS0] = env->spr[SPR_BOOKE_MAS4] & MAS4_TLBSELD_MASK; + env->spr[SPR_BOOKE_MAS1] = env->spr[SPR_BOOKE_MAS4] & MAS4_TSIZED_MASK; + env->spr[SPR_BOOKE_MAS2] = env->spr[SPR_BOOKE_MAS4] & MAS4_WIMGED_MASK; + env->spr[SPR_BOOKE_MAS3] = 0; + env->spr[SPR_BOOKE_MAS7] = 0; + + if (env->spr[SPR_BOOKE_MAS6] & MAS6_SAS) { + env->spr[SPR_BOOKE_MAS1] |= MAS1_TS; + } + + env->spr[SPR_BOOKE_MAS1] |= (env->spr[SPR_BOOKE_MAS6] >> 16) + << MAS1_TID_SHIFT; + + /* next victim logic */ + env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_ESEL_SHIFT; + env->last_way++; + env->last_way &= booke206_tlb_ways(env, 0) - 1; + env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_NV_SHIFT; +} + +static inline void booke206_invalidate_ea_tlb(CPUState *env, int tlbn, + uint32_t ea) +{ + int i; + int ways = booke206_tlb_ways(env, tlbn); + + for (i = 0; i < ways; i++) { + ppcemb_tlb_t *tlb = booke206_get_tlbe(env, tlbn, ea, i); + target_phys_addr_t masked_ea = ea & ~(tlb->size - 1); + if ((tlb->EPN == (masked_ea >> MAS2_EPN_SHIFT)) && + !(tlb->attr & MAS1_IPROT)) { + tlb->prot = 0; + } + } +} + +void helper_booke206_tlbivax(target_ulong address) +{ + if (address & 0x4) { + /* flush all entries */ + if (address & 0x8) { + /* flush all of TLB1 */ + booke206_flush_tlb(env, BOOKE206_FLUSH_TLB1, 1); + } else { + /* flush all of TLB0 */ + booke206_flush_tlb(env, BOOKE206_FLUSH_TLB0, 0); + } + return; + } + + if (address & 0x8) { + /* flush TLB1 entries */ + booke206_invalidate_ea_tlb(env, 1, address); + tlb_flush(env, 1); + } else { + /* flush TLB0 entries */ + booke206_invalidate_ea_tlb(env, 0, address); + tlb_flush_page(env, address & MAS2_EPN_MASK); + } +} + +void helper_booke206_tlbflush(uint32_t type) +{ + int flags = 0; + + if (type & 2) { + flags |= BOOKE206_FLUSH_TLB1; + } + + if (type & 4) { + flags |= BOOKE206_FLUSH_TLB0; + } + + booke206_flush_tlb(env, flags, 1); +} + #endif /* !CONFIG_USER_ONLY */ |