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, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
29 #include "host-utils.h"
32 //#define CRIS_HELPER_DEBUG
35 #ifdef CRIS_HELPER_DEBUG
37 #define D_LOG(...) qemu_log(__VA__ARGS__)
40 #define D_LOG(...) do { } while (0)
43 #if defined(CONFIG_USER_ONLY)
45 void do_interrupt (CPUState *env)
47 env->exception_index = -1;
48 env->pregs[PR_ERP] = env->pc;
51 int cpu_cris_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
52 int mmu_idx, int is_softmmu)
54 env->exception_index = 0xaa;
55 env->pregs[PR_EDA] = address;
56 cpu_dump_state(env, stderr, fprintf, 0);
60 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
65 #else /* !CONFIG_USER_ONLY */
68 static void cris_shift_ccs(CPUState *env)
71 /* Apply the ccs shift. */
72 ccs = env->pregs[PR_CCS];
73 ccs = ((ccs & 0xc0000000) | ((ccs << 12) >> 2)) & ~0x3ff;
74 env->pregs[PR_CCS] = ccs;
77 int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
78 int mmu_idx, int is_softmmu)
80 struct cris_mmu_result_t res;
85 D(printf ("%s addr=%x pc=%x rw=%x\n", __func__, address, env->pc, rw));
86 address &= TARGET_PAGE_MASK;
87 miss = cris_mmu_translate(&res, env, address, rw, mmu_idx);
90 if (env->exception_index == EXCP_BUSFAULT)
92 "CRIS: Illegal recursive bus fault."
96 env->exception_index = EXCP_BUSFAULT;
97 env->fault_vector = res.bf_vec;
103 * Mask off the cache selection bit. The ETRAX busses do not
106 phy = res.phy & ~0x80000000;
108 r = tlb_set_page(env, address, phy, prot, mmu_idx, is_softmmu);
111 D_LOG("%s returns %d irqreq=%x addr=%x"
112 " phy=%x ismmu=%d vec=%x pc=%x\n",
113 __func__, r, env->interrupt_request,
114 address, res.phy, is_softmmu, res.bf_vec, env->pc);
118 void do_interrupt(CPUState *env)
122 D_LOG( "exception index=%d interrupt_req=%d\n",
123 env->exception_index,
124 env->interrupt_request);
126 switch (env->exception_index)
129 /* These exceptions are genereated by the core itself.
130 ERP should point to the insn following the brk. */
131 ex_vec = env->trap_vector;
132 env->pregs[PR_ERP] = env->pc;
136 /* NMI is hardwired to vector zero. */
138 env->pregs[PR_CCS] &= ~M_FLAG;
139 env->pregs[PR_NRP] = env->pc;
143 ex_vec = env->fault_vector;
144 env->pregs[PR_ERP] = env->pc;
148 /* The interrupt controller gives us the vector. */
149 ex_vec = env->interrupt_vector;
150 /* Normal interrupts are taken between
151 TB's. env->pc is valid here. */
152 env->pregs[PR_ERP] = env->pc;
156 /* Fill in the IDX field. */
157 env->pregs[PR_EXS] = (ex_vec & 0xff) << 8;
160 D_LOG("excp isr=%x PC=%x ds=%d SP=%x"
161 " ERP=%x pid=%x ccs=%x cc=%d %x\n",
162 ex_vec, env->pc, env->dslot,
164 env->pregs[PR_ERP], env->pregs[PR_PID],
166 env->cc_op, env->cc_mask);
167 /* We loose the btarget, btaken state here so rexec the
169 env->pregs[PR_ERP] -= env->dslot;
170 /* Exception starts with dslot cleared. */
174 env->pc = ldl_code(env->pregs[PR_EBP] + ex_vec * 4);
176 if (env->pregs[PR_CCS] & U_FLAG) {
177 /* Swap stack pointers. */
178 env->pregs[PR_USP] = env->regs[R_SP];
179 env->regs[R_SP] = env->ksp;
182 /* Apply the CRIS CCS shift. Clears U if set. */
184 D_LOG("%s isr=%x vec=%x ccs=%x pid=%d erp=%x\n",
185 __func__, env->pc, ex_vec,
191 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
194 struct cris_mmu_result_t res;
196 miss = cris_mmu_translate(&res, env, addr, 0, 0);
199 D(fprintf(stderr, "%s %x -> %x\n", __func__, addr, phy));