#include "exec/cpu-common.h"
#include "exec/memory.h"
+#include "exec/tswap.h"
#include "qemu/thread.h"
#include "hw/core/cpu.h"
#include "qemu/rcu.h"
-#define EXCP_INTERRUPT 0x10000 /* async interruption */
+#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) */
/* some important defines:
*
- * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
+ * HOST_BIG_ENDIAN : whether the host cpu is big endian and
* otherwise little endian.
*
- * TARGET_WORDS_BIGENDIAN : same for target cpu
+ * TARGET_BIG_ENDIAN : same for the target cpu
*/
-#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
+#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
#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))
/* 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)
+#if TARGET_BIG_ENDIAN
#define lduw_p(p) lduw_be_p(p)
#define ldsw_p(p) ldsw_be_p(p)
#define ldl_p(p) ldl_be_p(p)
#if defined(CONFIG_USER_ONLY)
#include "exec/user/abitypes.h"
+#include "exec/user/guest-base.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 uintptr_t guest_base;
extern bool have_guest_base;
+
+/*
+ * If non-zero, the guest virtual address space is a contiguous subset
+ * of the host virtual address space, i.e. '-R reserved_va' is in effect
+ * either from the command-line or by default. The value is the last
+ * byte of the guest address space e.g. UINT32_MAX.
+ *
+ * If zero, the host and guest virtual address spaces are intermingled.
+ */
extern unsigned long reserved_va;
/*
#define GUEST_ADDR_MAX_ \
((MIN_CONST(TARGET_VIRT_ADDR_SPACE_BITS, TARGET_ABI_BITS) <= 32) ? \
UINT32_MAX : ~0ul)
-#define GUEST_ADDR_MAX (reserved_va ? reserved_va - 1 : GUEST_ADDR_MAX_)
+#define GUEST_ADDR_MAX (reserved_va ? : GUEST_ADDR_MAX_)
#else
#define PAGE_TARGET_1 0x0200
#define PAGE_TARGET_2 0x0400
+/*
+ * For linux-user, indicates that the page is mapped with the same semantics
+ * in both guest and host.
+ */
+#define PAGE_PASSTHROUGH 0x0800
+
#if defined(CONFIG_USER_ONLY)
void page_dump(FILE *f);
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);
+void page_set_flags(target_ulong start, target_ulong last, int flags);
+void page_reset_target_data(target_ulong start, target_ulong last);
/**
- * page_alloc_target_data(address, size)
- * @address: guest virtual address
- * @size: size of data to allocate
+ * page_check_range
+ * @start: first byte of range
+ * @len: length of range
+ * @flags: flags required for each page
+ *
+ * Return true if every page in [@start, @start+@len) has @flags set.
+ * Return false if any page is unmapped. Thus testing flags == 0 is
+ * equivalent to testing for flags == PAGE_VALID.
+ */
+bool page_check_range(target_ulong start, target_ulong last, int flags);
+
+/**
+ * page_check_range_empty:
+ * @start: first byte of range
+ * @last: last byte of range
+ * Context: holding mmap lock
*
- * Allocate @size bytes of out-of-band data to associate with the
- * guest page at @address. If the page is not mapped, NULL will
- * be returned. If there is existing data associated with @address,
- * no new memory will be allocated.
+ * Return true if the entire range [@start, @last] is unmapped.
+ * The memory lock must be held so that the caller will can ensure
+ * the result stays true until a new mapping can be installed.
+ */
+bool page_check_range_empty(target_ulong start, target_ulong last);
+
+/**
+ * page_find_range_empty
+ * @min: first byte of search range
+ * @max: last byte of search range
+ * @len: size of the hole required
+ * @align: alignment of the hole required (power of 2)
*
- * The memory will be freed when the guest page is deallocated,
- * e.g. with the munmap system call.
+ * If there is a range [x, x+@len) within [@min, @max] such that
+ * x % @align == 0, then return x. Otherwise return -1.
+ * The memory lock must be held, as the caller will want to ensure
+ * the returned range stays empty until a new mapping can be installed.
*/
-void *page_alloc_target_data(target_ulong address, size_t size);
+target_ulong page_find_range_empty(target_ulong min, target_ulong max,
+ target_ulong len, target_ulong align);
/**
* page_get_target_data(address)
* @address: guest virtual address
*
- * Return any out-of-bound memory assocated with the guest page
- * at @address, as per page_alloc_target_data.
+ * Return TARGET_PAGE_DATA_SIZE bytes of out-of-band data to associate
+ * with the guest page at @address, allocating it if necessary. The
+ * caller should already have verified that the address is valid.
+ *
+ * The memory will be freed when the guest page is deallocated,
+ * e.g. with the munmap system call.
*/
-void *page_get_target_data(target_ulong address);
+void *page_get_target_data(target_ulong address)
+ __attribute__((returns_nonnull));
#endif
CPUArchState *cpu_copy(CPUArchState *env);
* be signaled by probe_access_flags().
*/
#define TLB_INVALID_MASK (1 << (TARGET_PAGE_BITS_MIN - 1))
-#define TLB_MMIO 0
+#define TLB_MMIO (1 << (TARGET_PAGE_BITS_MIN - 2))
#define TLB_WATCHPOINT 0
#else
*
* Use TARGET_PAGE_BITS_MIN so that these bits are constant
* when TARGET_PAGE_BITS_VARY is in effect.
+ *
+ * The count, if not the placement of these bits is known
+ * to tcg/tcg-op-ldst.c, check_max_alignment().
*/
/* Zero if TLB entry is valid. */
#define TLB_INVALID_MASK (1 << (TARGET_PAGE_BITS_MIN - 1))
#define TLB_NOTDIRTY (1 << (TARGET_PAGE_BITS_MIN - 2))
/* Set if TLB entry is an IO callback. */
#define TLB_MMIO (1 << (TARGET_PAGE_BITS_MIN - 3))
-/* Set if TLB entry contains a watchpoint. */
-#define TLB_WATCHPOINT (1 << (TARGET_PAGE_BITS_MIN - 4))
-/* Set if TLB entry requires byte swap. */
-#define TLB_BSWAP (1 << (TARGET_PAGE_BITS_MIN - 5))
/* Set if TLB entry writes ignored. */
-#define TLB_DISCARD_WRITE (1 << (TARGET_PAGE_BITS_MIN - 6))
+#define TLB_DISCARD_WRITE (1 << (TARGET_PAGE_BITS_MIN - 4))
+/* Set if the slow path must be used; more flags in CPUTLBEntryFull. */
+#define TLB_FORCE_SLOW (1 << (TARGET_PAGE_BITS_MIN - 5))
-/* Use this mask to check interception with an alignment mask
+/*
+ * 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_WATCHPOINT | TLB_BSWAP | TLB_DISCARD_WRITE)
+ | TLB_FORCE_SLOW | TLB_DISCARD_WRITE)
+
+/*
+ * Flags stored in CPUTLBEntryFull.slow_flags[x].
+ * TLB_FORCE_SLOW must be set in CPUTLBEntry.addr_idx[x].
+ */
+/* Set if TLB entry requires byte swap. */
+#define TLB_BSWAP (1 << 0)
+/* Set if TLB entry contains a watchpoint. */
+#define TLB_WATCHPOINT (1 << 1)
+
+#define TLB_SLOW_FLAGS_MASK (TLB_BSWAP | TLB_WATCHPOINT)
+
+/* The two sets of flags must not overlap. */
+QEMU_BUILD_BUG_ON(TLB_FLAGS_MASK & TLB_SLOW_FLAGS_MASK);
/**
* tlb_hit_page: return true if page aligned @addr is a hit against the
* @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)
+static inline bool tlb_hit_page(uint64_t tlb_addr, vaddr addr)
{
return addr == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
}
* @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)
+static inline bool tlb_hit(uint64_t tlb_addr, vaddr addr)
{
return tlb_hit_page(tlb_addr, addr & TARGET_PAGE_MASK);
}
#ifdef CONFIG_TCG
-/* accel/tcg/cpu-exec.c */
-void dump_drift_info(GString *buf);
/* accel/tcg/translate-all.c */
void dump_exec_info(GString *buf);
-void dump_opcount_info(GString *buf);
#endif /* CONFIG_TCG */
#endif /* !CONFIG_USER_ONLY */
/* accel/tcg/cpu-exec.c */
int cpu_exec(CPUState *cpu);
-void tcg_exec_realizefn(CPUState *cpu, Error **errp);
-void tcg_exec_unrealizefn(CPUState *cpu);
/**
* cpu_set_cpustate_pointers(cpu)
*/
static inline void cpu_set_cpustate_pointers(ArchCPU *cpu)
{
- cpu->parent_obj.env_ptr = &cpu->env;
- cpu->parent_obj.icount_decr_ptr = &cpu->neg.icount_decr;
}
+/* Validate correct placement of CPUArchState. */
+QEMU_BUILD_BUG_ON(offsetof(ArchCPU, parent_obj) != 0);
+QEMU_BUILD_BUG_ON(offsetof(ArchCPU, env) != sizeof(CPUState));
+
/**
* env_archcpu(env)
* @env: The architecture environment
*/
static inline ArchCPU *env_archcpu(CPUArchState *env)
{
- return container_of(env, ArchCPU, env);
+ return (void *)env - sizeof(CPUState);
}
/**
*/
static inline CPUState *env_cpu(CPUArchState *env)
{
- return &env_archcpu(env)->parent_obj;
+ return (void *)env - sizeof(CPUState);
}
/**
*/
static inline CPUNegativeOffsetState *env_neg(CPUArchState *env)
{
- ArchCPU *arch_cpu = container_of(env, ArchCPU, env);
- return &arch_cpu->neg;
-}
-
-/**
- * cpu_neg(cpu)
- * @cpu: The generic CPUState
- *
- * Return the CPUNegativeOffsetState associated with the cpu.
- */
-static inline CPUNegativeOffsetState *cpu_neg(CPUState *cpu)
-{
- ArchCPU *arch_cpu = container_of(cpu, ArchCPU, parent_obj);
- return &arch_cpu->neg;
+ return &env_cpu(env)->neg;
}
/**
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