include/exec/cpu-all.h - qemu - Git at Google

 /*
  * 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"

 /* some important defines:
  *
  * WORDS_ALIGNED : if defined, the host cpu can only make word aligned
  * memory accesses.
  *
  * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
  * otherwise little endian.
  *
  * (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))
  *
  * 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)
 #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)
 #endif

 /* MMU memory access macros */

 #if defined(CONFIG_USER_ONLY)
 #include <assert.h>
 #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.
  */
 #if defined(CONFIG_USE_GUEST_BASE)
 extern unsigned long guest_base;
 extern int have_guest_base;
 extern unsigned long reserved_va;
 #define GUEST_BASE guest_base
 #define RESERVED_VA reserved_va
 #else
 #define GUEST_BASE 0ul
 #define RESERVED_VA 0ul
 #endif

 #define GUEST_ADDR_MAX (RESERVED_VA ? RESERVED_VA : \
                                     (1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
 #endif

 /* page related stuff */

 #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)

 /* ??? These should be the larger of uintptr_t and target_ulong.  */
 extern uintptr_t qemu_real_host_page_size;
 extern uintptr_t qemu_host_page_size;
 extern uintptr_t qemu_host_page_mask;

 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_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
 #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)

 /* memory API */

 typedef struct RAMBlock RAMBlock;

 struct RAMBlock {
     struct rcu_head rcu;
     struct MemoryRegion *mr;
     uint8_t *host;
     ram_addr_t offset;
     ram_addr_t used_length;
     ram_addr_t max_length;
     void (*resized)(const char*, uint64_t length, void *host);
     uint32_t flags;
     /* Protected by iothread lock.  */
     char idstr[256];
     /* Reads can take either the iothread or the ramlist lock.
      * Writes must take both locks.
      */
     QLIST_ENTRY(RAMBlock) next;
     int fd;
 };

 static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset)
 {
     assert(offset < block->used_length);
     assert(block->host);
     return (char *)block->host + offset;
 }

 typedef struct RAMList {
     QemuMutex mutex;
     /* Protected by the iothread lock.  */
     unsigned long *dirty_memory[DIRTY_MEMORY_NUM];
     RAMBlock *mru_block;
     /* Protected by the ramlist lock.  */
     QLIST_HEAD(, RAMBlock) blocks;
     uint32_t version;
 } RAMList;
 extern RAMList ram_list;

 /* Flags stored in the low bits of the TLB virtual address.  These are
    defined so that fast path ram access is all zeros.  */
 /* Zero if TLB entry is valid.  */
 #define TLB_INVALID_MASK   (1 << 3)
 /* Set if TLB entry references a clean RAM page.  The iotlb entry will
    contain the page physical address.  */
 #define TLB_NOTDIRTY    (1 << 4)
 /* Set if TLB entry is an IO callback.  */
 #define TLB_MMIO        (1 << 5)

 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
 void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf);
 ram_addr_t last_ram_offset(void);
 void qemu_mutex_lock_ramlist(void);
 void qemu_mutex_unlock_ramlist(void);
 #endif /* !CONFIG_USER_ONLY */

 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
                         uint8_t *buf, int len, int is_write);

 #endif /* CPU_ALL_H */
	/*
	* 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"

	/* some important defines:
	*
	* WORDS_ALIGNED : if defined, the host cpu can only make word aligned
	* memory accesses.
	*
	* HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
	* otherwise little endian.
	*
	* (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))
	*
	* 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)
	#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)
	#endif

	/* MMU memory access macros */

	#if defined(CONFIG_USER_ONLY)
	#include <assert.h>
	#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.
	*/
	#if defined(CONFIG_USE_GUEST_BASE)
	extern unsigned long guest_base;
	extern int have_guest_base;
	extern unsigned long reserved_va;
	#define GUEST_BASE guest_base
	#define RESERVED_VA reserved_va
	#else
	#define GUEST_BASE 0ul
	#define RESERVED_VA 0ul
	#endif

	#define GUEST_ADDR_MAX (RESERVED_VA ? RESERVED_VA : \
	(1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
	#endif

	/* page related stuff */

	#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)

	/* ??? These should be the larger of uintptr_t and target_ulong. */
	extern uintptr_t qemu_real_host_page_size;
	extern uintptr_t qemu_host_page_size;
	extern uintptr_t qemu_host_page_mask;

	#define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_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
	#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)

	/* memory API */

	typedef struct RAMBlock RAMBlock;

	struct RAMBlock {
	struct rcu_head rcu;
	struct MemoryRegion *mr;
	uint8_t *host;
	ram_addr_t offset;
	ram_addr_t used_length;
	ram_addr_t max_length;
	void (resized)(const char, uint64_t length, void *host);
	uint32_t flags;
	/* Protected by iothread lock. */
	char idstr[256];
	/* Reads can take either the iothread or the ramlist lock.
	* Writes must take both locks.
	*/
	QLIST_ENTRY(RAMBlock) next;
	int fd;
	};

	static inline void ramblock_ptr(RAMBlock block, ram_addr_t offset)
	{
	assert(offset < block->used_length);
	assert(block->host);
	return (char *)block->host + offset;
	}

	typedef struct RAMList {
	QemuMutex mutex;
	/* Protected by the iothread lock. */
	unsigned long *dirty_memory[DIRTY_MEMORY_NUM];
	RAMBlock *mru_block;
	/* Protected by the ramlist lock. */
	QLIST_HEAD(, RAMBlock) blocks;
	uint32_t version;
	} RAMList;
	extern RAMList ram_list;

	/* Flags stored in the low bits of the TLB virtual address. These are
	defined so that fast path ram access is all zeros. */
	/* Zero if TLB entry is valid. */
	#define TLB_INVALID_MASK (1 << 3)
	/* Set if TLB entry references a clean RAM page. The iotlb entry will
	contain the page physical address. */
	#define TLB_NOTDIRTY (1 << 4)
	/* Set if TLB entry is an IO callback. */
	#define TLB_MMIO (1 << 5)

	void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
	void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf);
	ram_addr_t last_ram_offset(void);
	void qemu_mutex_lock_ramlist(void);
	void qemu_mutex_unlock_ramlist(void);
	#endif /* !CONFIG_USER_ONLY */

	int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
	uint8_t *buf, int len, int is_write);

	#endif /* CPU_ALL_H */