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Annotation of qemu/target-alpha/mem_helper.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *  Helpers for loads and stores
        !             3:  *
        !             4:  *  Copyright (c) 2007 Jocelyn Mayer
        !             5:  *
        !             6:  * This library is free software; you can redistribute it and/or
        !             7:  * modify it under the terms of the GNU Lesser General Public
        !             8:  * License as published by the Free Software Foundation; either
        !             9:  * version 2 of the License, or (at your option) any later version.
        !            10:  *
        !            11:  * This library is distributed in the hope that it will be useful,
        !            12:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            14:  * Lesser General Public License for more details.
        !            15:  *
        !            16:  * You should have received a copy of the GNU Lesser General Public
        !            17:  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
        !            18:  */
        !            19: 
        !            20: #include "cpu.h"
        !            21: #include "helper.h"
        !            22: 
        !            23: 
        !            24: /* Softmmu support */
        !            25: #ifndef CONFIG_USER_ONLY
        !            26: 
        !            27: uint64_t helper_ldl_phys(uint64_t p)
        !            28: {
        !            29:     return (int32_t)ldl_phys(p);
        !            30: }
        !            31: 
        !            32: uint64_t helper_ldq_phys(uint64_t p)
        !            33: {
        !            34:     return ldq_phys(p);
        !            35: }
        !            36: 
        !            37: uint64_t helper_ldl_l_phys(CPUAlphaState *env, uint64_t p)
        !            38: {
        !            39:     env->lock_addr = p;
        !            40:     return env->lock_value = (int32_t)ldl_phys(p);
        !            41: }
        !            42: 
        !            43: uint64_t helper_ldq_l_phys(CPUAlphaState *env, uint64_t p)
        !            44: {
        !            45:     env->lock_addr = p;
        !            46:     return env->lock_value = ldq_phys(p);
        !            47: }
        !            48: 
        !            49: void helper_stl_phys(uint64_t p, uint64_t v)
        !            50: {
        !            51:     stl_phys(p, v);
        !            52: }
        !            53: 
        !            54: void helper_stq_phys(uint64_t p, uint64_t v)
        !            55: {
        !            56:     stq_phys(p, v);
        !            57: }
        !            58: 
        !            59: uint64_t helper_stl_c_phys(CPUAlphaState *env, uint64_t p, uint64_t v)
        !            60: {
        !            61:     uint64_t ret = 0;
        !            62: 
        !            63:     if (p == env->lock_addr) {
        !            64:         int32_t old = ldl_phys(p);
        !            65:         if (old == (int32_t)env->lock_value) {
        !            66:             stl_phys(p, v);
        !            67:             ret = 1;
        !            68:         }
        !            69:     }
        !            70:     env->lock_addr = -1;
        !            71: 
        !            72:     return ret;
        !            73: }
        !            74: 
        !            75: uint64_t helper_stq_c_phys(CPUAlphaState *env, uint64_t p, uint64_t v)
        !            76: {
        !            77:     uint64_t ret = 0;
        !            78: 
        !            79:     if (p == env->lock_addr) {
        !            80:         uint64_t old = ldq_phys(p);
        !            81:         if (old == env->lock_value) {
        !            82:             stq_phys(p, v);
        !            83:             ret = 1;
        !            84:         }
        !            85:     }
        !            86:     env->lock_addr = -1;
        !            87: 
        !            88:     return ret;
        !            89: }
        !            90: 
        !            91: static void do_unaligned_access(CPUAlphaState *env, target_ulong addr,
        !            92:                                 int is_write, int is_user, uintptr_t retaddr)
        !            93: {
        !            94:     uint64_t pc;
        !            95:     uint32_t insn;
        !            96: 
        !            97:     do_restore_state(env, retaddr);
        !            98: 
        !            99:     pc = env->pc;
        !           100:     insn = cpu_ldl_code(env, pc);
        !           101: 
        !           102:     env->trap_arg0 = addr;
        !           103:     env->trap_arg1 = insn >> 26;                /* opcode */
        !           104:     env->trap_arg2 = (insn >> 21) & 31;         /* dest regno */
        !           105:     env->exception_index = EXCP_UNALIGN;
        !           106:     env->error_code = 0;
        !           107:     cpu_loop_exit(env);
        !           108: }
        !           109: 
        !           110: void cpu_unassigned_access(CPUAlphaState *env, target_phys_addr_t addr,
        !           111:                            int is_write, int is_exec, int unused, int size)
        !           112: {
        !           113:     env->trap_arg0 = addr;
        !           114:     env->trap_arg1 = is_write;
        !           115:     dynamic_excp(env, 0, EXCP_MCHK, 0);
        !           116: }
        !           117: 
        !           118: #include "softmmu_exec.h"
        !           119: 
        !           120: #define MMUSUFFIX _mmu
        !           121: #define ALIGNED_ONLY
        !           122: 
        !           123: #define SHIFT 0
        !           124: #include "softmmu_template.h"
        !           125: 
        !           126: #define SHIFT 1
        !           127: #include "softmmu_template.h"
        !           128: 
        !           129: #define SHIFT 2
        !           130: #include "softmmu_template.h"
        !           131: 
        !           132: #define SHIFT 3
        !           133: #include "softmmu_template.h"
        !           134: 
        !           135: /* try to fill the TLB and return an exception if error. If retaddr is
        !           136:    NULL, it means that the function was called in C code (i.e. not
        !           137:    from generated code or from helper.c) */
        !           138: /* XXX: fix it to restore all registers */
        !           139: void tlb_fill(CPUAlphaState *env, target_ulong addr, int is_write,
        !           140:               int mmu_idx, uintptr_t retaddr)
        !           141: {
        !           142:     int ret;
        !           143: 
        !           144:     ret = cpu_alpha_handle_mmu_fault(env, addr, is_write, mmu_idx);
        !           145:     if (unlikely(ret != 0)) {
        !           146:         do_restore_state(env, retaddr);
        !           147:         /* Exception index and error code are already set */
        !           148:         cpu_loop_exit(env);
        !           149:     }
        !           150: }
        !           151: #endif /* CONFIG_USER_ONLY */

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