2 * CRIS helper routines.
4 * Copyright (c) 2007 AXIS Communications AB
5 * Written by Edgar E. Iglesias.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
28 #include "host-utils.h"
31 //#define CRIS_HELPER_DEBUG
34 #ifdef CRIS_HELPER_DEBUG
36 #define D_LOG(...) qemu_log(__VA__ARGS__)
39 #define D_LOG(...) do { } while (0)
42 #if defined(CONFIG_USER_ONLY)
44 void do_interrupt (CPUState *env)
46 env->exception_index = -1;
47 env->pregs[PR_ERP] = env->pc;
50 int cpu_cris_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
51 int mmu_idx, int is_softmmu)
53 env->exception_index = 0xaa;
54 env->pregs[PR_EDA] = address;
55 cpu_dump_state(env, stderr, fprintf, 0);
59 #else /* !CONFIG_USER_ONLY */
62 static void cris_shift_ccs(CPUState *env)
65 /* Apply the ccs shift. */
66 ccs = env->pregs[PR_CCS];
67 ccs = ((ccs & 0xc0000000) | ((ccs << 12) >> 2)) & ~0x3ff;
68 env->pregs[PR_CCS] = ccs;
71 int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
72 int mmu_idx, int is_softmmu)
74 struct cris_mmu_result res;
79 D(printf ("%s addr=%x pc=%x rw=%x\n", __func__, address, env->pc, rw));
80 miss = cris_mmu_translate(&res, env, address & TARGET_PAGE_MASK,
84 if (env->exception_index == EXCP_BUSFAULT)
86 "CRIS: Illegal recursive bus fault."
90 env->pregs[PR_EDA] = address;
91 env->exception_index = EXCP_BUSFAULT;
92 env->fault_vector = res.bf_vec;
98 * Mask off the cache selection bit. The ETRAX busses do not
101 phy = res.phy & ~0x80000000;
103 tlb_set_page(env, address & TARGET_PAGE_MASK, phy,
104 prot, mmu_idx, TARGET_PAGE_SIZE);
108 D_LOG("%s returns %d irqreq=%x addr=%x"
109 " phy=%x ismmu=%d vec=%x pc=%x\n",
110 __func__, r, env->interrupt_request,
111 address, res.phy, is_softmmu, res.bf_vec, env->pc);
115 static void do_interruptv10(CPUState *env)
119 D_LOG( "exception index=%d interrupt_req=%d\n",
120 env->exception_index,
121 env->interrupt_request);
123 assert(!(env->pregs[PR_CCS] & PFIX_FLAG));
124 switch (env->exception_index)
127 /* These exceptions are genereated by the core itself.
128 ERP should point to the insn following the brk. */
129 ex_vec = env->trap_vector;
130 env->pregs[PR_ERP] = env->pc;
134 /* NMI is hardwired to vector zero. */
136 env->pregs[PR_CCS] &= ~M_FLAG;
137 env->pregs[PR_NRP] = env->pc;
141 cpu_abort(env, "Unhandled busfault");
145 /* The interrupt controller gives us the vector. */
146 ex_vec = env->interrupt_vector;
147 /* Normal interrupts are taken between
148 TB's. env->pc is valid here. */
149 env->pregs[PR_ERP] = env->pc;
153 if (env->pregs[PR_CCS] & U_FLAG) {
154 /* Swap stack pointers. */
155 env->pregs[PR_USP] = env->regs[R_SP];
156 env->regs[R_SP] = env->ksp;
159 /* Now that we are in kernel mode, load the handlers address. */
160 env->pc = ldl_code(env->pregs[PR_EBP] + ex_vec * 4);
163 qemu_log_mask(CPU_LOG_INT, "%s isr=%x vec=%x ccs=%x pid=%d erp=%x\n",
164 __func__, env->pc, ex_vec,
170 void do_interrupt(CPUState *env)
174 if (env->pregs[PR_VR] < 32)
175 return do_interruptv10(env);
177 D_LOG( "exception index=%d interrupt_req=%d\n",
178 env->exception_index,
179 env->interrupt_request);
181 switch (env->exception_index)
184 /* These exceptions are genereated by the core itself.
185 ERP should point to the insn following the brk. */
186 ex_vec = env->trap_vector;
187 env->pregs[PR_ERP] = env->pc;
191 /* NMI is hardwired to vector zero. */
193 env->pregs[PR_CCS] &= ~M_FLAG;
194 env->pregs[PR_NRP] = env->pc;
198 ex_vec = env->fault_vector;
199 env->pregs[PR_ERP] = env->pc;
203 /* The interrupt controller gives us the vector. */
204 ex_vec = env->interrupt_vector;
205 /* Normal interrupts are taken between
206 TB's. env->pc is valid here. */
207 env->pregs[PR_ERP] = env->pc;
211 /* Fill in the IDX field. */
212 env->pregs[PR_EXS] = (ex_vec & 0xff) << 8;
215 D_LOG("excp isr=%x PC=%x ds=%d SP=%x"
216 " ERP=%x pid=%x ccs=%x cc=%d %x\n",
217 ex_vec, env->pc, env->dslot,
219 env->pregs[PR_ERP], env->pregs[PR_PID],
221 env->cc_op, env->cc_mask);
222 /* We loose the btarget, btaken state here so rexec the
224 env->pregs[PR_ERP] -= env->dslot;
225 /* Exception starts with dslot cleared. */
229 if (env->pregs[PR_CCS] & U_FLAG) {
230 /* Swap stack pointers. */
231 env->pregs[PR_USP] = env->regs[R_SP];
232 env->regs[R_SP] = env->ksp;
235 /* Apply the CRIS CCS shift. Clears U if set. */
238 /* Now that we are in kernel mode, load the handlers address.
239 This load may not fault, real hw leaves that behaviour as
241 env->pc = ldl_code(env->pregs[PR_EBP] + ex_vec * 4);
243 /* Clear the excption_index to avoid spurios hw_aborts for recursive
245 env->exception_index = -1;
247 D_LOG("%s isr=%x vec=%x ccs=%x pid=%d erp=%x\n",
248 __func__, env->pc, ex_vec,
254 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
257 struct cris_mmu_result res;
260 miss = cris_mmu_translate(&res, env, addr, 0, 0, 1);
261 /* If D TLB misses, try I TLB. */
263 miss = cris_mmu_translate(&res, env, addr, 2, 0, 1);
268 D(fprintf(stderr, "%s %x -> %x\n", __func__, addr, phy));