269bd5d8f6
We have for some time had code within the tcg backends to handle large positive offsets from env. This move makes sure that need not happen. Indeed, we are able to assert at build time that simple offsets suffice for all hosts. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
444 lines
12 KiB
C
444 lines
12 KiB
C
/*
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* defines common to all virtual CPUs
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CPU_ALL_H
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#define CPU_ALL_H
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#include "qemu-common.h"
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#include "exec/cpu-common.h"
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#include "exec/memory.h"
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#include "qemu/thread.h"
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#include "qom/cpu.h"
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#include "qemu/rcu.h"
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#define EXCP_INTERRUPT 0x10000 /* async interruption */
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#define EXCP_HLT 0x10001 /* hlt instruction reached */
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#define EXCP_DEBUG 0x10002 /* cpu stopped after a breakpoint or singlestep */
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#define EXCP_HALTED 0x10003 /* cpu is halted (waiting for external event) */
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#define EXCP_YIELD 0x10004 /* cpu wants to yield timeslice to another */
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#define EXCP_ATOMIC 0x10005 /* stop-the-world and emulate atomic */
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/* some important defines:
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*
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* HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
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* otherwise little endian.
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*
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* TARGET_WORDS_BIGENDIAN : same for target cpu
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*/
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#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
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#define BSWAP_NEEDED
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#endif
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#ifdef BSWAP_NEEDED
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static inline uint16_t tswap16(uint16_t s)
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{
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return bswap16(s);
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}
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static inline uint32_t tswap32(uint32_t s)
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{
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return bswap32(s);
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}
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static inline uint64_t tswap64(uint64_t s)
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{
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return bswap64(s);
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}
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static inline void tswap16s(uint16_t *s)
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{
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*s = bswap16(*s);
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}
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static inline void tswap32s(uint32_t *s)
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{
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*s = bswap32(*s);
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}
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static inline void tswap64s(uint64_t *s)
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{
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*s = bswap64(*s);
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}
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#else
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static inline uint16_t tswap16(uint16_t s)
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{
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return s;
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}
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static inline uint32_t tswap32(uint32_t s)
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{
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return s;
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}
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static inline uint64_t tswap64(uint64_t s)
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{
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return s;
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}
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static inline void tswap16s(uint16_t *s)
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{
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}
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static inline void tswap32s(uint32_t *s)
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{
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}
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static inline void tswap64s(uint64_t *s)
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{
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}
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#endif
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#if TARGET_LONG_SIZE == 4
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#define tswapl(s) tswap32(s)
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#define tswapls(s) tswap32s((uint32_t *)(s))
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#define bswaptls(s) bswap32s(s)
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#else
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#define tswapl(s) tswap64(s)
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#define tswapls(s) tswap64s((uint64_t *)(s))
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#define bswaptls(s) bswap64s(s)
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#endif
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/* Target-endianness CPU memory access functions. These fit into the
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* {ld,st}{type}{sign}{size}{endian}_p naming scheme described in bswap.h.
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*/
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#if defined(TARGET_WORDS_BIGENDIAN)
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#define lduw_p(p) lduw_be_p(p)
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#define ldsw_p(p) ldsw_be_p(p)
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#define ldl_p(p) ldl_be_p(p)
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#define ldq_p(p) ldq_be_p(p)
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#define ldfl_p(p) ldfl_be_p(p)
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#define ldfq_p(p) ldfq_be_p(p)
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#define stw_p(p, v) stw_be_p(p, v)
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#define stl_p(p, v) stl_be_p(p, v)
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#define stq_p(p, v) stq_be_p(p, v)
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#define stfl_p(p, v) stfl_be_p(p, v)
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#define stfq_p(p, v) stfq_be_p(p, v)
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#define ldn_p(p, sz) ldn_be_p(p, sz)
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#define stn_p(p, sz, v) stn_be_p(p, sz, v)
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#else
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#define lduw_p(p) lduw_le_p(p)
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#define ldsw_p(p) ldsw_le_p(p)
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#define ldl_p(p) ldl_le_p(p)
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#define ldq_p(p) ldq_le_p(p)
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#define ldfl_p(p) ldfl_le_p(p)
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#define ldfq_p(p) ldfq_le_p(p)
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#define stw_p(p, v) stw_le_p(p, v)
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#define stl_p(p, v) stl_le_p(p, v)
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#define stq_p(p, v) stq_le_p(p, v)
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#define stfl_p(p, v) stfl_le_p(p, v)
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#define stfq_p(p, v) stfq_le_p(p, v)
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#define ldn_p(p, sz) ldn_le_p(p, sz)
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#define stn_p(p, sz, v) stn_le_p(p, sz, v)
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#endif
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/* MMU memory access macros */
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#if defined(CONFIG_USER_ONLY)
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#include "exec/user/abitypes.h"
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/* On some host systems the guest address space is reserved on the host.
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* This allows the guest address space to be offset to a convenient location.
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*/
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extern unsigned long guest_base;
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extern int have_guest_base;
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extern unsigned long reserved_va;
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#if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS
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#define GUEST_ADDR_MAX (~0ul)
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#else
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#define GUEST_ADDR_MAX (reserved_va ? reserved_va - 1 : \
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(1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
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#endif
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#else
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#include "exec/hwaddr.h"
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#define SUFFIX
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#define ARG1 as
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#define ARG1_DECL AddressSpace *as
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#define TARGET_ENDIANNESS
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#include "exec/memory_ldst.inc.h"
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#define SUFFIX _cached_slow
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#define ARG1 cache
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#define ARG1_DECL MemoryRegionCache *cache
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#define TARGET_ENDIANNESS
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#include "exec/memory_ldst.inc.h"
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static inline void stl_phys_notdirty(AddressSpace *as, hwaddr addr, uint32_t val)
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{
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address_space_stl_notdirty(as, addr, val,
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MEMTXATTRS_UNSPECIFIED, NULL);
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}
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#define SUFFIX
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#define ARG1 as
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#define ARG1_DECL AddressSpace *as
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#define TARGET_ENDIANNESS
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#include "exec/memory_ldst_phys.inc.h"
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/* Inline fast path for direct RAM access. */
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#define ENDIANNESS
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#include "exec/memory_ldst_cached.inc.h"
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#define SUFFIX _cached
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#define ARG1 cache
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#define ARG1_DECL MemoryRegionCache *cache
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#define TARGET_ENDIANNESS
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#include "exec/memory_ldst_phys.inc.h"
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#endif
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/* page related stuff */
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#ifdef TARGET_PAGE_BITS_VARY
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extern bool target_page_bits_decided;
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extern int target_page_bits;
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#define TARGET_PAGE_BITS ({ assert(target_page_bits_decided); \
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target_page_bits; })
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#else
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#define TARGET_PAGE_BITS_MIN TARGET_PAGE_BITS
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#endif
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#define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
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#define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
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#define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
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/* Using intptr_t ensures that qemu_*_page_mask is sign-extended even
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* when intptr_t is 32-bit and we are aligning a long long.
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*/
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extern uintptr_t qemu_host_page_size;
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extern intptr_t qemu_host_page_mask;
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#define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
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#define REAL_HOST_PAGE_ALIGN(addr) (((addr) + qemu_real_host_page_size - 1) & \
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qemu_real_host_page_mask)
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/* same as PROT_xxx */
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#define PAGE_READ 0x0001
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#define PAGE_WRITE 0x0002
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#define PAGE_EXEC 0x0004
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#define PAGE_BITS (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
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#define PAGE_VALID 0x0008
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/* original state of the write flag (used when tracking self-modifying
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code */
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#define PAGE_WRITE_ORG 0x0010
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/* Invalidate the TLB entry immediately, helpful for s390x
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* Low-Address-Protection. Used with PAGE_WRITE in tlb_set_page_with_attrs() */
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#define PAGE_WRITE_INV 0x0040
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#if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
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/* FIXME: Code that sets/uses this is broken and needs to go away. */
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#define PAGE_RESERVED 0x0020
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#endif
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#if defined(CONFIG_USER_ONLY)
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void page_dump(FILE *f);
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typedef int (*walk_memory_regions_fn)(void *, target_ulong,
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target_ulong, unsigned long);
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int walk_memory_regions(void *, walk_memory_regions_fn);
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int page_get_flags(target_ulong address);
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void page_set_flags(target_ulong start, target_ulong end, int flags);
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int page_check_range(target_ulong start, target_ulong len, int flags);
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#endif
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CPUArchState *cpu_copy(CPUArchState *env);
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/* Flags for use in ENV->INTERRUPT_PENDING.
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The numbers assigned here are non-sequential in order to preserve
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binary compatibility with the vmstate dump. Bit 0 (0x0001) was
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previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
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the vmstate dump. */
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/* External hardware interrupt pending. This is typically used for
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interrupts from devices. */
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#define CPU_INTERRUPT_HARD 0x0002
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/* Exit the current TB. This is typically used when some system-level device
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makes some change to the memory mapping. E.g. the a20 line change. */
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#define CPU_INTERRUPT_EXITTB 0x0004
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/* Halt the CPU. */
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#define CPU_INTERRUPT_HALT 0x0020
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/* Debug event pending. */
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#define CPU_INTERRUPT_DEBUG 0x0080
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/* Reset signal. */
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#define CPU_INTERRUPT_RESET 0x0400
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/* Several target-specific external hardware interrupts. Each target/cpu.h
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should define proper names based on these defines. */
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#define CPU_INTERRUPT_TGT_EXT_0 0x0008
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#define CPU_INTERRUPT_TGT_EXT_1 0x0010
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#define CPU_INTERRUPT_TGT_EXT_2 0x0040
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#define CPU_INTERRUPT_TGT_EXT_3 0x0200
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#define CPU_INTERRUPT_TGT_EXT_4 0x1000
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/* Several target-specific internal interrupts. These differ from the
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preceding target-specific interrupts in that they are intended to
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originate from within the cpu itself, typically in response to some
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instruction being executed. These, therefore, are not masked while
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single-stepping within the debugger. */
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#define CPU_INTERRUPT_TGT_INT_0 0x0100
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#define CPU_INTERRUPT_TGT_INT_1 0x0800
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#define CPU_INTERRUPT_TGT_INT_2 0x2000
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/* First unused bit: 0x4000. */
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/* The set of all bits that should be masked when single-stepping. */
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#define CPU_INTERRUPT_SSTEP_MASK \
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(CPU_INTERRUPT_HARD \
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| CPU_INTERRUPT_TGT_EXT_0 \
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| CPU_INTERRUPT_TGT_EXT_1 \
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| CPU_INTERRUPT_TGT_EXT_2 \
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| CPU_INTERRUPT_TGT_EXT_3 \
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| CPU_INTERRUPT_TGT_EXT_4)
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#if !defined(CONFIG_USER_ONLY)
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/* Flags stored in the low bits of the TLB virtual address. These are
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* defined so that fast path ram access is all zeros.
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* The flags all must be between TARGET_PAGE_BITS and
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* maximum address alignment bit.
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*/
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/* Zero if TLB entry is valid. */
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#define TLB_INVALID_MASK (1 << (TARGET_PAGE_BITS - 1))
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/* Set if TLB entry references a clean RAM page. The iotlb entry will
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contain the page physical address. */
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#define TLB_NOTDIRTY (1 << (TARGET_PAGE_BITS - 2))
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/* Set if TLB entry is an IO callback. */
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#define TLB_MMIO (1 << (TARGET_PAGE_BITS - 3))
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/* Set if TLB entry must have MMU lookup repeated for every access */
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#define TLB_RECHECK (1 << (TARGET_PAGE_BITS - 4))
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/* Use this mask to check interception with an alignment mask
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* in a TCG backend.
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*/
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#define TLB_FLAGS_MASK (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO \
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| TLB_RECHECK)
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/**
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* tlb_hit_page: return true if page aligned @addr is a hit against the
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* TLB entry @tlb_addr
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*
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* @addr: virtual address to test (must be page aligned)
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* @tlb_addr: TLB entry address (a CPUTLBEntry addr_read/write/code value)
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*/
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static inline bool tlb_hit_page(target_ulong tlb_addr, target_ulong addr)
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{
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return addr == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
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}
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/**
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* tlb_hit: return true if @addr is a hit against the TLB entry @tlb_addr
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*
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* @addr: virtual address to test (need not be page aligned)
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* @tlb_addr: TLB entry address (a CPUTLBEntry addr_read/write/code value)
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*/
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static inline bool tlb_hit(target_ulong tlb_addr, target_ulong addr)
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{
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return tlb_hit_page(tlb_addr, addr & TARGET_PAGE_MASK);
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}
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void dump_exec_info(void);
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void dump_opcount_info(void);
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#endif /* !CONFIG_USER_ONLY */
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int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
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uint8_t *buf, target_ulong len, int is_write);
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int cpu_exec(CPUState *cpu);
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/**
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* cpu_set_cpustate_pointers(cpu)
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* @cpu: The cpu object
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*
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* Set the generic pointers in CPUState into the outer object.
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*/
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static inline void cpu_set_cpustate_pointers(ArchCPU *cpu)
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{
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cpu->parent_obj.env_ptr = &cpu->env;
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cpu->parent_obj.icount_decr_ptr = &cpu->neg.icount_decr;
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}
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/**
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* env_archcpu(env)
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* @env: The architecture environment
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*
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* Return the ArchCPU associated with the environment.
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*/
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static inline ArchCPU *env_archcpu(CPUArchState *env)
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{
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return container_of(env, ArchCPU, env);
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}
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/**
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* env_cpu(env)
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* @env: The architecture environment
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*
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* Return the CPUState associated with the environment.
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*/
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static inline CPUState *env_cpu(CPUArchState *env)
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{
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return &env_archcpu(env)->parent_obj;
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}
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/**
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* env_neg(env)
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* @env: The architecture environment
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*
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* Return the CPUNegativeOffsetState associated with the environment.
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*/
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static inline CPUNegativeOffsetState *env_neg(CPUArchState *env)
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{
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ArchCPU *arch_cpu = container_of(env, ArchCPU, env);
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return &arch_cpu->neg;
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}
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/**
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* cpu_neg(cpu)
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* @cpu: The generic CPUState
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*
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* Return the CPUNegativeOffsetState associated with the cpu.
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*/
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static inline CPUNegativeOffsetState *cpu_neg(CPUState *cpu)
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{
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ArchCPU *arch_cpu = container_of(cpu, ArchCPU, parent_obj);
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return &arch_cpu->neg;
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}
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/**
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* env_tlb(env)
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* @env: The architecture environment
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*
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* Return the CPUTLB state associated with the environment.
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*/
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static inline CPUTLB *env_tlb(CPUArchState *env)
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{
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return &env_neg(env)->tlb;
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}
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#endif /* CPU_ALL_H */
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