xref: /qemu/include/accel/tcg/cpu-ldst.h (revision 0b6426ba6c218fa807fe97258d75cb4bc84c860d)

/*
 *  Software MMU support (per-target)
 *
 * 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/>.
 *
 */

/*
 * Generate inline load/store functions for all MMU modes (typically
 * at least _user and _kernel) as well as _data versions, for all data
 * sizes.
 *
 * Used by target op helpers.
 *
 * The syntax for the accessors is:
 *
 * load:  cpu_ld{sign}{size}{end}_{mmusuffix}(env, ptr)
 *        cpu_ld{sign}{size}{end}_{mmusuffix}_ra(env, ptr, retaddr)
 *        cpu_ld{sign}{size}{end}_mmuidx_ra(env, ptr, mmu_idx, retaddr)
 *        cpu_ld{sign}{size}{end}_mmu(env, ptr, oi, retaddr)
 *
 * store: cpu_st{size}{end}_{mmusuffix}(env, ptr, val)
 *        cpu_st{size}{end}_{mmusuffix}_ra(env, ptr, val, retaddr)
 *        cpu_st{size}{end}_mmuidx_ra(env, ptr, val, mmu_idx, retaddr)
 *        cpu_st{size}{end}_mmu(env, ptr, val, oi, retaddr)
 *
 * sign is:
 * (empty): for 32 and 64 bit sizes
 *   u    : unsigned
 *   s    : signed
 *
 * size is:
 *   b: 8 bits
 *   w: 16 bits
 *   l: 32 bits
 *   q: 64 bits
 *
 * end is:
 * (empty): for target native endian, or for 8 bit access
 *     _be: for forced big endian
 *     _le: for forced little endian
 *
 * mmusuffix is one of the generic suffixes "data" or "code", or "mmuidx".
 * The "mmuidx" suffix carries an extra mmu_idx argument that specifies
 * the index to use; the "data" and "code" suffixes take the index from
 * cpu_mmu_index().
 *
 * The "mmu" suffix carries the full MemOpIdx, with both mmu_idx and the
 * MemOp including alignment requirements.  The alignment will be enforced.
 */
#ifndef CPU_LDST_H
#define CPU_LDST_H

#ifndef CONFIG_TCG
#error Can only include this header with TCG
#endif

#include "exec/cpu-ldst-common.h"
#include "exec/abi_ptr.h"

#if defined(CONFIG_USER_ONLY)
#include "user/guest-host.h"
#endif /* CONFIG_USER_ONLY */

uint32_t cpu_ldub_data(CPUArchState *env, abi_ptr ptr);
int cpu_ldsb_data(CPUArchState *env, abi_ptr ptr);
uint32_t cpu_lduw_be_data(CPUArchState *env, abi_ptr ptr);
int cpu_ldsw_be_data(CPUArchState *env, abi_ptr ptr);
uint32_t cpu_ldl_be_data(CPUArchState *env, abi_ptr ptr);
uint64_t cpu_ldq_be_data(CPUArchState *env, abi_ptr ptr);
uint32_t cpu_lduw_le_data(CPUArchState *env, abi_ptr ptr);
int cpu_ldsw_le_data(CPUArchState *env, abi_ptr ptr);
uint32_t cpu_ldl_le_data(CPUArchState *env, abi_ptr ptr);
uint64_t cpu_ldq_le_data(CPUArchState *env, abi_ptr ptr);

uint32_t cpu_ldub_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
int cpu_ldsb_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
uint32_t cpu_lduw_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
int cpu_ldsw_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
uint32_t cpu_ldl_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
uint64_t cpu_ldq_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
uint32_t cpu_lduw_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
int cpu_ldsw_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
uint32_t cpu_ldl_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
uint64_t cpu_ldq_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);

void cpu_stb_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
void cpu_stw_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
void cpu_stl_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
void cpu_stq_be_data(CPUArchState *env, abi_ptr ptr, uint64_t val);
void cpu_stw_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
void cpu_stl_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
void cpu_stq_le_data(CPUArchState *env, abi_ptr ptr, uint64_t val);

void cpu_stb_data_ra(CPUArchState *env, abi_ptr ptr,
                     uint32_t val, uintptr_t ra);
void cpu_stw_be_data_ra(CPUArchState *env, abi_ptr ptr,
                        uint32_t val, uintptr_t ra);
void cpu_stl_be_data_ra(CPUArchState *env, abi_ptr ptr,
                        uint32_t val, uintptr_t ra);
void cpu_stq_be_data_ra(CPUArchState *env, abi_ptr ptr,
                        uint64_t val, uintptr_t ra);
void cpu_stw_le_data_ra(CPUArchState *env, abi_ptr ptr,
                        uint32_t val, uintptr_t ra);
void cpu_stl_le_data_ra(CPUArchState *env, abi_ptr ptr,
                        uint32_t val, uintptr_t ra);
void cpu_stq_le_data_ra(CPUArchState *env, abi_ptr ptr,
                        uint64_t val, uintptr_t ra);

uint32_t cpu_ldub_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                            int mmu_idx, uintptr_t ra);
int cpu_ldsb_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                       int mmu_idx, uintptr_t ra);
uint32_t cpu_lduw_be_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                               int mmu_idx, uintptr_t ra);
int cpu_ldsw_be_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                          int mmu_idx, uintptr_t ra);
uint32_t cpu_ldl_be_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                              int mmu_idx, uintptr_t ra);
uint64_t cpu_ldq_be_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                              int mmu_idx, uintptr_t ra);
uint32_t cpu_lduw_le_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                               int mmu_idx, uintptr_t ra);
int cpu_ldsw_le_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                          int mmu_idx, uintptr_t ra);
uint32_t cpu_ldl_le_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                              int mmu_idx, uintptr_t ra);
uint64_t cpu_ldq_le_mmuidx_ra(CPUArchState *env, abi_ptr ptr,
                              int mmu_idx, uintptr_t ra);

void cpu_stb_mmuidx_ra(CPUArchState *env, abi_ptr ptr, uint32_t val,
                       int mmu_idx, uintptr_t ra);
void cpu_stw_be_mmuidx_ra(CPUArchState *env, abi_ptr ptr, uint32_t val,
                          int mmu_idx, uintptr_t ra);
void cpu_stl_be_mmuidx_ra(CPUArchState *env, abi_ptr ptr, uint32_t val,
                          int mmu_idx, uintptr_t ra);
void cpu_stq_be_mmuidx_ra(CPUArchState *env, abi_ptr ptr, uint64_t val,
                          int mmu_idx, uintptr_t ra);
void cpu_stw_le_mmuidx_ra(CPUArchState *env, abi_ptr ptr, uint32_t val,
                          int mmu_idx, uintptr_t ra);
void cpu_stl_le_mmuidx_ra(CPUArchState *env, abi_ptr ptr, uint32_t val,
                          int mmu_idx, uintptr_t ra);
void cpu_stq_le_mmuidx_ra(CPUArchState *env, abi_ptr ptr, uint64_t val,
                          int mmu_idx, uintptr_t ra);

#if TARGET_BIG_ENDIAN
# define cpu_lduw_data        cpu_lduw_be_data
# define cpu_ldsw_data        cpu_ldsw_be_data
# define cpu_ldl_data         cpu_ldl_be_data
# define cpu_ldq_data         cpu_ldq_be_data
# define cpu_lduw_data_ra     cpu_lduw_be_data_ra
# define cpu_ldsw_data_ra     cpu_ldsw_be_data_ra
# define cpu_ldl_data_ra      cpu_ldl_be_data_ra
# define cpu_ldq_data_ra      cpu_ldq_be_data_ra
# define cpu_lduw_mmuidx_ra   cpu_lduw_be_mmuidx_ra
# define cpu_ldsw_mmuidx_ra   cpu_ldsw_be_mmuidx_ra
# define cpu_ldl_mmuidx_ra    cpu_ldl_be_mmuidx_ra
# define cpu_ldq_mmuidx_ra    cpu_ldq_be_mmuidx_ra
# define cpu_stw_data         cpu_stw_be_data
# define cpu_stl_data         cpu_stl_be_data
# define cpu_stq_data         cpu_stq_be_data
# define cpu_stw_data_ra      cpu_stw_be_data_ra
# define cpu_stl_data_ra      cpu_stl_be_data_ra
# define cpu_stq_data_ra      cpu_stq_be_data_ra
# define cpu_stw_mmuidx_ra    cpu_stw_be_mmuidx_ra
# define cpu_stl_mmuidx_ra    cpu_stl_be_mmuidx_ra
# define cpu_stq_mmuidx_ra    cpu_stq_be_mmuidx_ra
#else
# define cpu_lduw_data        cpu_lduw_le_data
# define cpu_ldsw_data        cpu_ldsw_le_data
# define cpu_ldl_data         cpu_ldl_le_data
# define cpu_ldq_data         cpu_ldq_le_data
# define cpu_lduw_data_ra     cpu_lduw_le_data_ra
# define cpu_ldsw_data_ra     cpu_ldsw_le_data_ra
# define cpu_ldl_data_ra      cpu_ldl_le_data_ra
# define cpu_ldq_data_ra      cpu_ldq_le_data_ra
# define cpu_lduw_mmuidx_ra   cpu_lduw_le_mmuidx_ra
# define cpu_ldsw_mmuidx_ra   cpu_ldsw_le_mmuidx_ra
# define cpu_ldl_mmuidx_ra    cpu_ldl_le_mmuidx_ra
# define cpu_ldq_mmuidx_ra    cpu_ldq_le_mmuidx_ra
# define cpu_stw_data         cpu_stw_le_data
# define cpu_stl_data         cpu_stl_le_data
# define cpu_stq_data         cpu_stq_le_data
# define cpu_stw_data_ra      cpu_stw_le_data_ra
# define cpu_stl_data_ra      cpu_stl_le_data_ra
# define cpu_stq_data_ra      cpu_stq_le_data_ra
# define cpu_stw_mmuidx_ra    cpu_stw_le_mmuidx_ra
# define cpu_stl_mmuidx_ra    cpu_stl_le_mmuidx_ra
# define cpu_stq_mmuidx_ra    cpu_stq_le_mmuidx_ra
#endif

uint32_t cpu_ldub_code(CPUArchState *env, abi_ptr addr);
uint32_t cpu_lduw_code(CPUArchState *env, abi_ptr addr);
uint32_t cpu_ldl_code(CPUArchState *env, abi_ptr addr);
uint64_t cpu_ldq_code(CPUArchState *env, abi_ptr addr);

/**
 * tlb_vaddr_to_host:
 * @env: CPUArchState
 * @addr: guest virtual address to look up
 * @access_type: 0 for read, 1 for write, 2 for execute
 * @mmu_idx: MMU index to use for lookup
 *
 * Look up the specified guest virtual index in the TCG softmmu TLB.
 * If we can translate a host virtual address suitable for direct RAM
 * access, without causing a guest exception, then return it.
 * Otherwise (TLB entry is for an I/O access, guest software
 * TLB fill required, etc) return NULL.
 */
#ifdef CONFIG_USER_ONLY
static inline void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
                                      MMUAccessType access_type, int mmu_idx)
{
    return g2h(env_cpu(env), addr);
}
#else
void *tlb_vaddr_to_host(CPUArchState *env, vaddr addr,
                        MMUAccessType access_type, int mmu_idx);
#endif

/*
 * For user-only, helpers that use guest to host address translation
 * must protect the actual host memory access by recording 'retaddr'
 * for the signal handler.  This is required for a race condition in
 * which another thread unmaps the page between a probe and the
 * actual access.
 */
#ifdef CONFIG_USER_ONLY
extern __thread uintptr_t helper_retaddr;

static inline void set_helper_retaddr(uintptr_t ra)
{
    helper_retaddr = ra;
    /*
     * Ensure that this write is visible to the SIGSEGV handler that
     * may be invoked due to a subsequent invalid memory operation.
     */
    signal_barrier();
}

static inline void clear_helper_retaddr(void)
{
    /*
     * Ensure that previous memory operations have succeeded before
     * removing the data visible to the signal handler.
     */
    signal_barrier();
    helper_retaddr = 0;
}
#else
#define set_helper_retaddr(ra)   do { } while (0)
#define clear_helper_retaddr()   do { } while (0)
#endif

#endif /* CPU_LDST_H */