4 * Copyright (c) 2007 CodeSourcery
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.
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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #if defined(CONFIG_USER_ONLY)
24 void do_interrupt(int is_hw)
26 env->exception_index = -1;
31 extern int semihosting_enabled;
33 #define MMUSUFFIX _mmu
35 # define GETPC() ((void*)((unsigned long)__builtin_return_address(0) & 0x7fffffffUL))
37 # define GETPC() (__builtin_return_address(0))
41 #include "softmmu_template.h"
44 #include "softmmu_template.h"
47 #include "softmmu_template.h"
50 #include "softmmu_template.h"
52 /* Try to fill the TLB and return an exception if error. If retaddr is
53 NULL, it means that the function was called in C code (i.e. not
54 from generated code or from helper.c) */
55 /* XXX: fix it to restore all registers */
56 void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
60 target_phys_addr_t pc;
63 /* XXX: hack to restore env in all cases, even if not called from
67 ret = cpu_m68k_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
68 if (__builtin_expect(ret, 0)) {
70 /* now we have a real cpu fault */
71 pc = (target_phys_addr_t)retaddr;
74 /* the PC is inside the translated code. It means that we have
75 a virtual CPU fault */
76 cpu_restore_state(tb, env, pc, NULL);
84 static void do_rte(void)
91 env->pc = ldl_kernel(sp + 4);
92 sp |= (fmt >> 28) & 3;
93 env->sr = fmt & 0xffff;
95 env->aregs[7] = sp + 8;
98 void do_interrupt(int is_hw)
109 switch (env->exception_index) {
111 /* Return from an exception. */
115 if (semihosting_enabled
116 && (env->sr & SR_S) != 0
117 && (env->pc & 3) == 0
118 && lduw_code(env->pc - 4) == 0x4e71
119 && ldl_code(env->pc) == 0x4e7bf000) {
121 do_m68k_semihosting(env, env->dregs[0]);
125 env->exception_index = EXCP_HLT;
129 if (env->exception_index >= EXCP_TRAP0
130 && env->exception_index <= EXCP_TRAP15) {
131 /* Move the PC after the trap instruction. */
136 vector = env->exception_index << 2;
141 fmt |= (sp & 3) << 28;
147 env->sr = (env->sr & ~SR_I) | (env->pending_level << SR_I_SHIFT);
152 /* ??? This could cause MMU faults. */
155 stl_kernel(sp, retaddr);
159 /* Jump to vector. */
160 env->pc = ldl_kernel(env->vbr + vector);