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qemu/include/exec/cpu-all.h
Peter Maydell 334692bce7 tcg: Define and use new tlb_hit() and tlb_hit_page() functions 
The condition to check whether an address has hit against a particular
TLB entry is not completely trivial. We do this in various places, and
in fact in one place (get_page_addr_code()) we have got the condition
wrong. Abstract it out into new tlb_hit() and tlb_hit_page() inline
functions (one for a known-page-aligned address and one for an
arbitrary address), and use them in all the places where we had the
condition correct.

This is a no-behaviour-change patch; we leave fixing the buggy
code in get_page_addr_code() to a subsequent patch.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180629162122.19376-2-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-07-02 08:02:20 -07:00

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/*
* defines common to all virtual CPUs
*
* Copyright (c) 2003 Fabrice Bellard
*
* 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/>.
*/
#ifndef CPU_ALL_H
#define CPU_ALL_H
#include "qemu-common.h"
#include "exec/cpu-common.h"
#include "exec/memory.h"
#include "qemu/thread.h"
#include "qom/cpu.h"
#include "qemu/rcu.h"
#define EXCP_INTERRUPT 0x10000 /* async interruption */
#define EXCP_HLT 0x10001 /* hlt instruction reached */
#define EXCP_DEBUG 0x10002 /* cpu stopped after a breakpoint or singlestep */
#define EXCP_HALTED 0x10003 /* cpu is halted (waiting for external event) */
#define EXCP_YIELD 0x10004 /* cpu wants to yield timeslice to another */
#define EXCP_ATOMIC 0x10005 /* stop-the-world and emulate atomic */
/* some important defines:
*
* HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
* otherwise little endian.
*
* TARGET_WORDS_BIGENDIAN : same for target cpu
*/
#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
#define BSWAP_NEEDED
#endif
#ifdef BSWAP_NEEDED
static inline uint16_t tswap16(uint16_t s)
{
return bswap16(s);
}
static inline uint32_t tswap32(uint32_t s)
{
return bswap32(s);
}
static inline uint64_t tswap64(uint64_t s)
{
return bswap64(s);
}
static inline void tswap16s(uint16_t *s)
{
*s = bswap16(*s);
}
static inline void tswap32s(uint32_t *s)
{
*s = bswap32(*s);
}
static inline void tswap64s(uint64_t *s)
{
*s = bswap64(*s);
}
#else
static inline uint16_t tswap16(uint16_t s)
{
return s;
}
static inline uint32_t tswap32(uint32_t s)
{
return s;
}
static inline uint64_t tswap64(uint64_t s)
{
return s;
}
static inline void tswap16s(uint16_t *s)
{
}
static inline void tswap32s(uint32_t *s)
{
}
static inline void tswap64s(uint64_t *s)
{
}
#endif
#if TARGET_LONG_SIZE == 4
#define tswapl(s) tswap32(s)
#define tswapls(s) tswap32s((uint32_t *)(s))
#define bswaptls(s) bswap32s(s)
#else
#define tswapl(s) tswap64(s)
#define tswapls(s) tswap64s((uint64_t *)(s))
#define bswaptls(s) bswap64s(s)
#endif
/* Target-endianness CPU memory access functions. These fit into the
* {ld,st}{type}{sign}{size}{endian}_p naming scheme described in bswap.h.
*/
#if defined(TARGET_WORDS_BIGENDIAN)
#define lduw_p(p) lduw_be_p(p)
#define ldsw_p(p) ldsw_be_p(p)
#define ldl_p(p) ldl_be_p(p)
#define ldq_p(p) ldq_be_p(p)
#define ldfl_p(p) ldfl_be_p(p)
#define ldfq_p(p) ldfq_be_p(p)
#define stw_p(p, v) stw_be_p(p, v)
#define stl_p(p, v) stl_be_p(p, v)
#define stq_p(p, v) stq_be_p(p, v)
#define stfl_p(p, v) stfl_be_p(p, v)
#define stfq_p(p, v) stfq_be_p(p, v)
#define ldn_p(p, sz) ldn_be_p(p, sz)
#define stn_p(p, sz, v) stn_be_p(p, sz, v)
#else
#define lduw_p(p) lduw_le_p(p)
#define ldsw_p(p) ldsw_le_p(p)
#define ldl_p(p) ldl_le_p(p)
#define ldq_p(p) ldq_le_p(p)
#define ldfl_p(p) ldfl_le_p(p)
#define ldfq_p(p) ldfq_le_p(p)
#define stw_p(p, v) stw_le_p(p, v)
#define stl_p(p, v) stl_le_p(p, v)
#define stq_p(p, v) stq_le_p(p, v)
#define stfl_p(p, v) stfl_le_p(p, v)
#define stfq_p(p, v) stfq_le_p(p, v)
#define ldn_p(p, sz) ldn_le_p(p, sz)
#define stn_p(p, sz, v) stn_le_p(p, sz, v)
#endif
/* MMU memory access macros */
#if defined(CONFIG_USER_ONLY)
#include "exec/user/abitypes.h"
/* On some host systems the guest address space is reserved on the host.
* This allows the guest address space to be offset to a convenient location.
*/
extern unsigned long guest_base;
extern int have_guest_base;
extern unsigned long reserved_va;
#if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS
#define GUEST_ADDR_MAX (~0ul)
#else
#define GUEST_ADDR_MAX (reserved_va ? reserved_va - 1 : \
(1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
#endif
#else
#include "exec/hwaddr.h"
#define SUFFIX
#define ARG1 as
#define ARG1_DECL AddressSpace *as
#define TARGET_ENDIANNESS
#include "exec/memory_ldst.inc.h"
#define SUFFIX _cached_slow
#define ARG1 cache
#define ARG1_DECL MemoryRegionCache *cache
#define TARGET_ENDIANNESS
#include "exec/memory_ldst.inc.h"
static inline void stl_phys_notdirty(AddressSpace *as, hwaddr addr, uint32_t val)
{
address_space_stl_notdirty(as, addr, val,
MEMTXATTRS_UNSPECIFIED, NULL);
}
#define SUFFIX
#define ARG1 as
#define ARG1_DECL AddressSpace *as
#define TARGET_ENDIANNESS
#include "exec/memory_ldst_phys.inc.h"
/* Inline fast path for direct RAM access. */
#define ENDIANNESS
#include "exec/memory_ldst_cached.inc.h"
#define SUFFIX _cached
#define ARG1 cache
#define ARG1_DECL MemoryRegionCache *cache
#define TARGET_ENDIANNESS
#include "exec/memory_ldst_phys.inc.h"
#endif
/* page related stuff */
#ifdef TARGET_PAGE_BITS_VARY
extern bool target_page_bits_decided;
extern int target_page_bits;
#define TARGET_PAGE_BITS ({ assert(target_page_bits_decided); \
target_page_bits; })
#else
#define TARGET_PAGE_BITS_MIN TARGET_PAGE_BITS
#endif
#define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
#define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
#define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
/* Using intptr_t ensures that qemu_*_page_mask is sign-extended even
* when intptr_t is 32-bit and we are aligning a long long.
*/
extern uintptr_t qemu_host_page_size;
extern intptr_t qemu_host_page_mask;
#define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
#define REAL_HOST_PAGE_ALIGN(addr) (((addr) + qemu_real_host_page_size - 1) & \
qemu_real_host_page_mask)
/* same as PROT_xxx */
#define PAGE_READ 0x0001
#define PAGE_WRITE 0x0002
#define PAGE_EXEC 0x0004
#define PAGE_BITS (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
#define PAGE_VALID 0x0008
/* original state of the write flag (used when tracking self-modifying
code */
#define PAGE_WRITE_ORG 0x0010
/* Invalidate the TLB entry immediately, helpful for s390x
* Low-Address-Protection. Used with PAGE_WRITE in tlb_set_page_with_attrs() */
#define PAGE_WRITE_INV 0x0040
#if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
/* FIXME: Code that sets/uses this is broken and needs to go away. */
#define PAGE_RESERVED 0x0020
#endif
#if defined(CONFIG_USER_ONLY)
void page_dump(FILE *f);
typedef int (*walk_memory_regions_fn)(void *, target_ulong,
target_ulong, unsigned long);
int walk_memory_regions(void *, walk_memory_regions_fn);
int page_get_flags(target_ulong address);
void page_set_flags(target_ulong start, target_ulong end, int flags);
int page_check_range(target_ulong start, target_ulong len, int flags);
#endif
CPUArchState *cpu_copy(CPUArchState *env);
/* Flags for use in ENV->INTERRUPT_PENDING.
The numbers assigned here are non-sequential in order to preserve
binary compatibility with the vmstate dump. Bit 0 (0x0001) was
previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
the vmstate dump. */
/* External hardware interrupt pending. This is typically used for
interrupts from devices. */
#define CPU_INTERRUPT_HARD 0x0002
/* Exit the current TB. This is typically used when some system-level device
makes some change to the memory mapping. E.g. the a20 line change. */
#define CPU_INTERRUPT_EXITTB 0x0004
/* Halt the CPU. */
#define CPU_INTERRUPT_HALT 0x0020
/* Debug event pending. */
#define CPU_INTERRUPT_DEBUG 0x0080
/* Reset signal. */
#define CPU_INTERRUPT_RESET 0x0400
/* Several target-specific external hardware interrupts. Each target/cpu.h
should define proper names based on these defines. */
#define CPU_INTERRUPT_TGT_EXT_0 0x0008
#define CPU_INTERRUPT_TGT_EXT_1 0x0010
#define CPU_INTERRUPT_TGT_EXT_2 0x0040
#define CPU_INTERRUPT_TGT_EXT_3 0x0200
#define CPU_INTERRUPT_TGT_EXT_4 0x1000
/* Several target-specific internal interrupts. These differ from the
preceding target-specific interrupts in that they are intended to
originate from within the cpu itself, typically in response to some
instruction being executed. These, therefore, are not masked while
single-stepping within the debugger. */
#define CPU_INTERRUPT_TGT_INT_0 0x0100
#define CPU_INTERRUPT_TGT_INT_1 0x0800
#define CPU_INTERRUPT_TGT_INT_2 0x2000
/* First unused bit: 0x4000. */
/* The set of all bits that should be masked when single-stepping. */
#define CPU_INTERRUPT_SSTEP_MASK \
(CPU_INTERRUPT_HARD \
| CPU_INTERRUPT_TGT_EXT_0 \
| CPU_INTERRUPT_TGT_EXT_1 \
| CPU_INTERRUPT_TGT_EXT_2 \
| CPU_INTERRUPT_TGT_EXT_3 \
| CPU_INTERRUPT_TGT_EXT_4)
#if !defined(CONFIG_USER_ONLY)
/* Flags stored in the low bits of the TLB virtual address. These are
* defined so that fast path ram access is all zeros.
* The flags all must be between TARGET_PAGE_BITS and
* maximum address alignment bit.
*/
/* Zero if TLB entry is valid. */
#define TLB_INVALID_MASK (1 << (TARGET_PAGE_BITS - 1))
/* Set if TLB entry references a clean RAM page. The iotlb entry will
contain the page physical address. */
#define TLB_NOTDIRTY (1 << (TARGET_PAGE_BITS - 2))
/* Set if TLB entry is an IO callback. */
#define TLB_MMIO (1 << (TARGET_PAGE_BITS - 3))
/* Set if TLB entry must have MMU lookup repeated for every access */
#define TLB_RECHECK (1 << (TARGET_PAGE_BITS - 4))
/* Use this mask to check interception with an alignment mask
* in a TCG backend.
*/
#define TLB_FLAGS_MASK (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO \
| TLB_RECHECK)
/**
* tlb_hit_page: return true if page aligned @addr is a hit against the
* TLB entry @tlb_addr
*
* @addr: virtual address to test (must be page aligned)
* @tlb_addr: TLB entry address (a CPUTLBEntry addr_read/write/code value)
*/
static inline bool tlb_hit_page(target_ulong tlb_addr, target_ulong addr)
{
return addr == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
}
/**
* tlb_hit: return true if @addr is a hit against the TLB entry @tlb_addr
*
* @addr: virtual address to test (need not be page aligned)
* @tlb_addr: TLB entry address (a CPUTLBEntry addr_read/write/code value)
*/
static inline bool tlb_hit(target_ulong tlb_addr, target_ulong addr)
{
return tlb_hit_page(tlb_addr, addr & TARGET_PAGE_MASK);
}
void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf);
#endif /* !CONFIG_USER_ONLY */
int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
uint8_t *buf, int len, int is_write);
int cpu_exec(CPUState *cpu);
#endif /* CPU_ALL_H */
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