diff options
Diffstat (limited to 'target/mips/sysemu/physaddr.c')
| -rw-r--r-- | target/mips/sysemu/physaddr.c | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/target/mips/sysemu/physaddr.c b/target/mips/sysemu/physaddr.c deleted file mode 100644 index 505781d..0000000 --- a/target/mips/sysemu/physaddr.c +++ /dev/null @@ -1,243 +0,0 @@ -/* - * MIPS TLB (Translation lookaside buffer) helpers. - * - * 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 "exec/exec-all.h" -#include "exec/page-protection.h" -#include "../internal.h" - -static int is_seg_am_mapped(unsigned int am, bool eu, int mmu_idx) -{ - /* - * Interpret access control mode and mmu_idx. - * AdE? TLB? - * AM K S U E K S U E - * UK 0 0 1 1 0 0 - - 0 - * MK 1 0 1 1 0 1 - - !eu - * MSK 2 0 0 1 0 1 1 - !eu - * MUSK 3 0 0 0 0 1 1 1 !eu - * MUSUK 4 0 0 0 0 0 1 1 0 - * USK 5 0 0 1 0 0 0 - 0 - * - 6 - - - - - - - - - * UUSK 7 0 0 0 0 0 0 0 0 - */ - int32_t adetlb_mask; - - switch (mmu_idx) { - case 3: /* ERL */ - /* If EU is set, always unmapped */ - if (eu) { - return 0; - } - /* fall through */ - case MIPS_HFLAG_KM: - /* Never AdE, TLB mapped if AM={1,2,3} */ - adetlb_mask = 0x70000000; - goto check_tlb; - - case MIPS_HFLAG_SM: - /* AdE if AM={0,1}, TLB mapped if AM={2,3,4} */ - adetlb_mask = 0xc0380000; - goto check_ade; - - case MIPS_HFLAG_UM: - /* AdE if AM={0,1,2,5}, TLB mapped if AM={3,4} */ - adetlb_mask = 0xe4180000; - /* fall through */ - check_ade: - /* does this AM cause AdE in current execution mode */ - if ((adetlb_mask << am) < 0) { - return TLBRET_BADADDR; - } - adetlb_mask <<= 8; - /* fall through */ - check_tlb: - /* is this AM mapped in current execution mode */ - return ((adetlb_mask << am) < 0); - default: - g_assert_not_reached(); - }; -} - -static int get_seg_physical_address(CPUMIPSState *env, hwaddr *physical, - int *prot, target_ulong real_address, - MMUAccessType access_type, int mmu_idx, - unsigned int am, bool eu, - target_ulong segmask, - hwaddr physical_base) -{ - int mapped = is_seg_am_mapped(am, eu, mmu_idx); - - if (mapped < 0) { - /* is_seg_am_mapped can report TLBRET_BADADDR */ - return mapped; - } else if (mapped) { - /* The segment is TLB mapped */ - return env->tlb->map_address(env, physical, prot, real_address, - access_type); - } else { - /* The segment is unmapped */ - *physical = physical_base | (real_address & segmask); - *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; - return TLBRET_MATCH; - } -} - -static int get_segctl_physical_address(CPUMIPSState *env, hwaddr *physical, - int *prot, target_ulong real_address, - MMUAccessType access_type, int mmu_idx, - uint16_t segctl, target_ulong segmask) -{ - unsigned int am = (segctl & CP0SC_AM_MASK) >> CP0SC_AM; - bool eu = (segctl >> CP0SC_EU) & 1; - hwaddr pa = ((hwaddr)segctl & CP0SC_PA_MASK) << 20; - - return get_seg_physical_address(env, physical, prot, real_address, - access_type, mmu_idx, am, eu, segmask, - pa & ~(hwaddr)segmask); -} - -int get_physical_address(CPUMIPSState *env, hwaddr *physical, - int *prot, target_ulong real_address, - MMUAccessType access_type, int mmu_idx) -{ - /* User mode can only access useg/xuseg */ -#if defined(TARGET_MIPS64) - int user_mode = mmu_idx == MIPS_HFLAG_UM; - int supervisor_mode = mmu_idx == MIPS_HFLAG_SM; - int kernel_mode = !user_mode && !supervisor_mode; - int UX = (env->CP0_Status & (1 << CP0St_UX)) != 0; - int SX = (env->CP0_Status & (1 << CP0St_SX)) != 0; - int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0; -#endif - int ret = TLBRET_MATCH; - /* effective address (modified for KVM T&E kernel segments) */ - target_ulong address = real_address; - - if (address <= USEG_LIMIT) { - /* useg */ - uint16_t segctl; - - if (address >= 0x40000000UL) { - segctl = env->CP0_SegCtl2; - } else { - segctl = env->CP0_SegCtl2 >> 16; - } - ret = get_segctl_physical_address(env, physical, prot, - real_address, access_type, - mmu_idx, segctl, 0x3FFFFFFF); -#if defined(TARGET_MIPS64) - } else if (address < 0x4000000000000000ULL) { - /* xuseg */ - if (UX && address <= (0x3FFFFFFFFFFFFFFFULL & env->SEGMask)) { - ret = env->tlb->map_address(env, physical, prot, - real_address, access_type); - } else { - ret = TLBRET_BADADDR; - } - } else if (address < 0x8000000000000000ULL) { - /* xsseg */ - if ((supervisor_mode || kernel_mode) && - SX && address <= (0x7FFFFFFFFFFFFFFFULL & env->SEGMask)) { - ret = env->tlb->map_address(env, physical, prot, - real_address, access_type); - } else { - ret = TLBRET_BADADDR; - } - } else if (address < 0xC000000000000000ULL) { - /* xkphys */ - if ((address & 0x07FFFFFFFFFFFFFFULL) <= env->PAMask) { - /* KX/SX/UX bit to check for each xkphys EVA access mode */ - static const uint8_t am_ksux[8] = { - [CP0SC_AM_UK] = (1u << CP0St_KX), - [CP0SC_AM_MK] = (1u << CP0St_KX), - [CP0SC_AM_MSK] = (1u << CP0St_SX), - [CP0SC_AM_MUSK] = (1u << CP0St_UX), - [CP0SC_AM_MUSUK] = (1u << CP0St_UX), - [CP0SC_AM_USK] = (1u << CP0St_SX), - [6] = (1u << CP0St_KX), - [CP0SC_AM_UUSK] = (1u << CP0St_UX), - }; - unsigned int am = CP0SC_AM_UK; - unsigned int xr = (env->CP0_SegCtl2 & CP0SC2_XR_MASK) >> CP0SC2_XR; - - if (xr & (1 << ((address >> 59) & 0x7))) { - am = (env->CP0_SegCtl1 & CP0SC1_XAM_MASK) >> CP0SC1_XAM; - } - /* Does CP0_Status.KX/SX/UX permit the access mode (am) */ - if (env->CP0_Status & am_ksux[am]) { - ret = get_seg_physical_address(env, physical, prot, - real_address, access_type, - mmu_idx, am, false, env->PAMask, - 0); - } else { - ret = TLBRET_BADADDR; - } - } else { - ret = TLBRET_BADADDR; - } - } else if (address < 0xFFFFFFFF80000000ULL) { - /* xkseg */ - if (kernel_mode && KX && - address <= (0xFFFFFFFF7FFFFFFFULL & env->SEGMask)) { - ret = env->tlb->map_address(env, physical, prot, - real_address, access_type); - } else { - ret = TLBRET_BADADDR; - } -#endif - } else if (address < KSEG1_BASE) { - /* kseg0 */ - ret = get_segctl_physical_address(env, physical, prot, real_address, - access_type, mmu_idx, - env->CP0_SegCtl1 >> 16, 0x1FFFFFFF); - } else if (address < KSEG2_BASE) { - /* kseg1 */ - ret = get_segctl_physical_address(env, physical, prot, real_address, - access_type, mmu_idx, - env->CP0_SegCtl1, 0x1FFFFFFF); - } else if (address < KSEG3_BASE) { - /* sseg (kseg2) */ - ret = get_segctl_physical_address(env, physical, prot, real_address, - access_type, mmu_idx, - env->CP0_SegCtl0 >> 16, 0x1FFFFFFF); - } else { - /* - * kseg3 - * XXX: debug segment is not emulated - */ - ret = get_segctl_physical_address(env, physical, prot, real_address, - access_type, mmu_idx, - env->CP0_SegCtl0, 0x1FFFFFFF); - } - return ret; -} - -hwaddr mips_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) -{ - CPUMIPSState *env = cpu_env(cs); - hwaddr phys_addr; - int prot; - - if (get_physical_address(env, &phys_addr, &prot, addr, MMU_DATA_LOAD, - mips_env_mmu_index(env)) != 0) { - return -1; - } - return phys_addr; -} |