2 * Moxie helper routines.
4 * Copyright (c) 2008, 2009, 2010, 2013 Anthony Green
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 General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "exec/exec-all.h"
28 #include "exec/softmmu_exec.h"
29 #include "qemu/host-utils.h"
32 #define MMUSUFFIX _mmu
35 #include "exec/softmmu_template.h"
38 #include "exec/softmmu_template.h"
41 #include "exec/softmmu_template.h"
44 #include "exec/softmmu_template.h"
46 /* Try to fill the TLB and return an exception if error. If retaddr is
47 NULL, it means that the function was called in C code (i.e. not
48 from generated code or from helper.c) */
49 void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
52 MoxieCPU *cpu = MOXIE_CPU(cs);
53 CPUMoxieState *env = &cpu->env;
56 ret = moxie_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
59 cpu_restore_state(env, retaddr);
65 void helper_raise_exception(CPUMoxieState *env, int ex)
67 CPUState *cs = CPU(moxie_env_get_cpu(env));
69 cs->exception_index = ex;
70 /* Stash the exception type. */
72 /* Stash the address where the exception occurred. */
73 cpu_restore_state(env, GETPC());
74 env->sregs[5] = env->pc;
75 /* Jump the the exception handline routine. */
76 env->pc = env->sregs[1];
80 uint32_t helper_div(CPUMoxieState *env, uint32_t a, uint32_t b)
82 if (unlikely(b == 0)) {
83 helper_raise_exception(env, MOXIE_EX_DIV0);
86 if (unlikely(a == INT_MIN && b == -1)) {
90 return (int32_t)a / (int32_t)b;
93 uint32_t helper_udiv(CPUMoxieState *env, uint32_t a, uint32_t b)
95 if (unlikely(b == 0)) {
96 helper_raise_exception(env, MOXIE_EX_DIV0);
102 void helper_debug(CPUMoxieState *env)
104 CPUState *cs = CPU(moxie_env_get_cpu(env));
106 cs->exception_index = EXCP_DEBUG;
110 #if defined(CONFIG_USER_ONLY)
112 void moxie_cpu_do_interrupt(CPUState *cs)
114 CPUState *cs = CPU(moxie_env_get_cpu(env));
116 cs->exception_index = -1;
119 int moxie_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
122 MoxieCPU *cpu = MOXIE_CPU(cs);
124 cs->exception_index = 0xaa;
125 cpu->env.debug1 = address;
126 cpu_dump_state(cs, stderr, fprintf, 0);
130 #else /* !CONFIG_USER_ONLY */
132 int moxie_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
135 MoxieCPU *cpu = MOXIE_CPU(cs);
136 CPUMoxieState *env = &cpu->env;
142 address &= TARGET_PAGE_MASK;
143 prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
144 miss = moxie_mmu_translate(&res, env, address, rw, mmu_idx);
146 /* handle the miss. */
148 cs->exception_index = MOXIE_EX_MMU_MISS;
153 tlb_set_page(env, address, phy, prot, mmu_idx, TARGET_PAGE_SIZE);
158 void moxie_cpu_do_interrupt(CPUState *cs)
160 switch (cs->exception_index) {
168 hwaddr moxie_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
170 MoxieCPU *cpu = MOXIE_CPU(cs);
175 miss = moxie_mmu_translate(&res, &cpu->env, addr, 0, 0);