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author | David Gibson <david@gibson.dropbear.id.au> | 2013-03-12 00:31:07 +0000 |
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committer | Alexander Graf <agraf@suse.de> | 2013-03-22 15:28:47 +0100 |
commit | 9d7c3f4a2935a70e7299a6862792bbfc48d62211 (patch) | |
tree | 48f61f396310b89b39b09d13a4483d03204c50fe /target-ppc/mmu-hash32.c | |
parent | 10b4652543313ca82284193fa107151c437f9b04 (diff) | |
download | hqemu-9d7c3f4a2935a70e7299a6862792bbfc48d62211.zip hqemu-9d7c3f4a2935a70e7299a6862792bbfc48d62211.tar.gz |
target-ppc: Disentangle pte_check()
Currently support for both 32-bit and 64-bit hash MMUs share an
implementation of pte_check. But there are enough differences that this
means the shared function has several very ugly conditionals on "is_64b".
This patch cleans things up by separating out the 64-bit version
(putting it into mmu-hash64.c) and the 32-bit hash version (putting it
in mmu-hash32.c). Another copy remains in mmu_helper.c, which is used
for the 6xx software loaded TLB paths.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/mmu-hash32.c')
-rw-r--r-- | target-ppc/mmu-hash32.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/target-ppc/mmu-hash32.c b/target-ppc/mmu-hash32.c new file mode 100644 index 0000000..ce5389d --- /dev/null +++ b/target-ppc/mmu-hash32.c @@ -0,0 +1,85 @@ +/* + * PowerPC MMU, TLB and BAT emulation helpers for QEMU. + * + * Copyright (c) 2003-2007 Jocelyn Mayer + * Copyright (c) 2013 David Gibson, IBM Corporation + * + * 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 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 "cpu.h" +#include "helper.h" +#include "sysemu/kvm.h" +#include "kvm_ppc.h" +#include "mmu-hash32.h" + +//#define DEBUG_MMU + +#ifdef DEBUG_MMU +# define LOG_MMU(...) qemu_log(__VA_ARGS__) +# define LOG_MMU_STATE(env) log_cpu_state((env), 0) +#else +# define LOG_MMU(...) do { } while (0) +# define LOG_MMU_STATE(...) do { } while (0) +#endif + +#define PTE_PTEM_MASK 0x7FFFFFBF +#define PTE_CHECK_MASK (TARGET_PAGE_MASK | 0x7B) + +static inline int pte_is_valid_hash32(target_ulong pte0) +{ + return pte0 & 0x80000000 ? 1 : 0; +} + +int pte_check_hash32(mmu_ctx_t *ctx, target_ulong pte0, + target_ulong pte1, int h, int rw, int type) +{ + target_ulong ptem, mmask; + int access, ret, pteh, ptev, pp; + + ret = -1; + /* Check validity and table match */ + ptev = pte_is_valid_hash32(pte0); + pteh = (pte0 >> 6) & 1; + if (ptev && h == pteh) { + /* Check vsid & api */ + ptem = pte0 & PTE_PTEM_MASK; + mmask = PTE_CHECK_MASK; + pp = pte1 & 0x00000003; + if (ptem == ctx->ptem) { + if (ctx->raddr != (hwaddr)-1ULL) { + /* all matches should have equal RPN, WIMG & PP */ + if ((ctx->raddr & mmask) != (pte1 & mmask)) { + qemu_log("Bad RPN/WIMG/PP\n"); + return -3; + } + } + /* Compute access rights */ + access = pp_check(ctx->key, pp, ctx->nx); + /* Keep the matching PTE informations */ + ctx->raddr = pte1; + ctx->prot = access; + ret = check_prot(ctx->prot, rw, type); + if (ret == 0) { + /* Access granted */ + LOG_MMU("PTE access granted !\n"); + } else { + /* Access right violation */ + LOG_MMU("PTE access rejected\n"); + } + } + } + + return ret; +} |