mirror of https://github.com/proxmox/mirror_qemu
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
![]() |
/*
|
||
|
* 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;
|
||
|
}
|