diff options
Diffstat (limited to 'target/ppc')
| -rw-r--r-- | target/ppc/mmu-hash64.c | 68 |
1 files changed, 42 insertions, 26 deletions
diff --git a/target/ppc/mmu-hash64.c b/target/ppc/mmu-hash64.c index 214149f65b..c74818b2e7 100644 --- a/target/ppc/mmu-hash64.c +++ b/target/ppc/mmu-hash64.c @@ -30,7 +30,7 @@ #include "hw/hw.h" #include "mmu-book3s-v3.h" -//#define DEBUG_SLB +/* #define DEBUG_SLB */ #ifdef DEBUG_SLB # define LOG_SLB(...) qemu_log_mask(CPU_LOG_MMU, __VA_ARGS__) @@ -58,9 +58,11 @@ static ppc_slb_t *slb_lookup(PowerPCCPU *cpu, target_ulong eaddr) LOG_SLB("%s: slot %d %016" PRIx64 " %016" PRIx64 "\n", __func__, n, slb->esid, slb->vsid); - /* We check for 1T matches on all MMUs here - if the MMU + /* + * We check for 1T matches on all MMUs here - if the MMU * doesn't have 1T segment support, we will have prevented 1T - * entries from being inserted in the slbmte code. */ + * entries from being inserted in the slbmte code. + */ if (((slb->esid == esid_256M) && ((slb->vsid & SLB_VSID_B) == SLB_VSID_B_256M)) || ((slb->esid == esid_1T) && @@ -103,7 +105,8 @@ void helper_slbia(CPUPPCState *env) if (slb->esid & SLB_ESID_V) { slb->esid &= ~SLB_ESID_V; - /* XXX: given the fact that segment size is 256 MB or 1TB, + /* + * XXX: given the fact that segment size is 256 MB or 1TB, * and we still don't have a tlb_flush_mask(env, n, mask) * in QEMU, we just invalidate all TLBs */ @@ -126,7 +129,8 @@ static void __helper_slbie(CPUPPCState *env, target_ulong addr, if (slb->esid & SLB_ESID_V) { slb->esid &= ~SLB_ESID_V; - /* XXX: given the fact that segment size is 256 MB or 1TB, + /* + * XXX: given the fact that segment size is 256 MB or 1TB, * and we still don't have a tlb_flush_mask(env, n, mask) * in QEMU, we just invalidate all TLBs */ @@ -306,8 +310,10 @@ static int ppc_hash64_pte_prot(PowerPCCPU *cpu, { CPUPPCState *env = &cpu->env; unsigned pp, key; - /* Some pp bit combinations have undefined behaviour, so default - * to no access in those cases */ + /* + * Some pp bit combinations have undefined behaviour, so default + * to no access in those cases + */ int prot = 0; key = !!(msr_pr ? (slb->vsid & SLB_VSID_KP) @@ -376,7 +382,7 @@ static int ppc_hash64_amr_prot(PowerPCCPU *cpu, ppc_hash_pte64_t pte) } key = HPTE64_R_KEY(pte.pte1); - amrbits = (env->spr[SPR_AMR] >> 2*(31 - key)) & 0x3; + amrbits = (env->spr[SPR_AMR] >> 2 * (31 - key)) & 0x3; /* fprintf(stderr, "AMR protection: key=%d AMR=0x%" PRIx64 "\n", key, */ /* env->spr[SPR_AMR]); */ @@ -547,8 +553,9 @@ static hwaddr ppc_hash64_pteg_search(PowerPCCPU *cpu, hwaddr hash, if (*pshift == 0) { continue; } - /* We don't do anything with pshift yet as qemu TLB only deals - * with 4K pages anyway + /* + * We don't do anything with pshift yet as qemu TLB only + * deals with 4K pages anyway */ pte->pte0 = pte0; pte->pte1 = pte1; @@ -572,8 +579,10 @@ static hwaddr ppc_hash64_htab_lookup(PowerPCCPU *cpu, uint64_t vsid, epnmask, epn, ptem; const PPCHash64SegmentPageSizes *sps = slb->sps; - /* The SLB store path should prevent any bad page size encodings - * getting in there, so: */ + /* + * The SLB store path should prevent any bad page size encodings + * getting in there, so: + */ assert(sps); /* If ISL is set in LPCR we need to clamp the page size to 4K */ @@ -732,17 +741,20 @@ int ppc_hash64_handle_mmu_fault(PowerPCCPU *cpu, vaddr eaddr, assert((rwx == 0) || (rwx == 1) || (rwx == 2)); - /* Note on LPCR usage: 970 uses HID4, but our special variant - * of store_spr copies relevant fields into env->spr[SPR_LPCR]. - * Similarily we filter unimplemented bits when storing into - * LPCR depending on the MMU version. This code can thus just - * use the LPCR "as-is". + /* + * Note on LPCR usage: 970 uses HID4, but our special variant of + * store_spr copies relevant fields into env->spr[SPR_LPCR]. + * Similarily we filter unimplemented bits when storing into LPCR + * depending on the MMU version. This code can thus just use the + * LPCR "as-is". */ /* 1. Handle real mode accesses */ if (((rwx == 2) && (msr_ir == 0)) || ((rwx != 2) && (msr_dr == 0))) { - /* Translation is supposedly "off" */ - /* In real mode the top 4 effective address bits are (mostly) ignored */ + /* + * Translation is supposedly "off", but in real mode the top 4 + * effective address bits are (mostly) ignored + */ raddr = eaddr & 0x0FFFFFFFFFFFFFFFULL; /* In HV mode, add HRMOR if top EA bit is clear */ @@ -875,8 +887,10 @@ skip_slb_search: if (rwx == 1) { new_pte1 |= HPTE64_R_C; /* set changed (dirty) bit */ } else { - /* Treat the page as read-only for now, so that a later write - * will pass through this function again to set the C bit */ + /* + * Treat the page as read-only for now, so that a later write + * will pass through this function again to set the C bit + */ prot &= ~PAGE_WRITE; } @@ -1023,8 +1037,9 @@ static void ppc_hash64_update_vrma(PowerPCCPU *cpu) return; } - /* Make one up. Mostly ignore the ESID which will not be - * needed for translation + /* + * Make one up. Mostly ignore the ESID which will not be needed + * for translation */ vsid = SLB_VSID_VRMA; vrmasd = (lpcr & LPCR_VRMASD) >> LPCR_VRMASD_SHIFT; @@ -1080,11 +1095,12 @@ void ppc_store_lpcr(PowerPCCPU *cpu, target_ulong val) } env->spr[SPR_RMOR] = ((lpcr >> 41) & 0xffffull) << 26; - /* XXX We could also write LPID from HID4 here + /* + * XXX We could also write LPID from HID4 here * but since we don't tag any translation on it * it doesn't actually matter - */ - /* XXX For proper emulation of 970 we also need + * + * XXX For proper emulation of 970 we also need * to dig HRMOR out of HID5 */ break; |