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authoredgar_igl <edgar_igl@c046a42c-6fe2-441c-8c8c-71466251a162>2008-05-06 08:04:40 +0000
committeredgar_igl <edgar_igl@c046a42c-6fe2-441c-8c8c-71466251a162>2008-05-06 08:04:40 +0000
commitef29a70d18c2d551cf4bb74b8aa9638caac3391b (patch)
tree5f96cc802caeeb4c3c62d107b4b3e55b4af3d9e0
parent4586f9e9a1c2b4d7856b640f7f327589dbfe2423 (diff)
downloadhqemu-ef29a70d18c2d551cf4bb74b8aa9638caac3391b.zip
hqemu-ef29a70d18c2d551cf4bb74b8aa9638caac3391b.tar.gz
CRIS MMU Updates
* Add support for exec faults and for the k protection bit. * Abort if search_pc causes recursive mmu faults. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4349 c046a42c-6fe2-441c-8c8c-71466251a162
-rw-r--r--target-cris/helper.c11
-rw-r--r--target-cris/mmu.c21
-rw-r--r--target-cris/op_helper.c6
3 files changed, 28 insertions, 10 deletions
diff --git a/target-cris/helper.c b/target-cris/helper.c
index 1bd35e6..f537361 100644
--- a/target-cris/helper.c
+++ b/target-cris/helper.c
@@ -79,6 +79,12 @@ int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
miss = cris_mmu_translate(&res, env, address, rw, mmu_idx);
if (miss)
{
+ if (env->exception_index == EXCP_MMU_FAULT)
+ cpu_abort(env,
+ "CRIS: Illegal recursive bus fault."
+ "addr=%x rw=%d\n",
+ address, rw);
+
env->exception_index = EXCP_MMU_FAULT;
env->fault_vector = res.bf_vec;
r = 1;
@@ -101,7 +107,7 @@ void do_interrupt(CPUState *env)
{
int ex_vec = -1;
- D(fprintf (stderr, "exception index=%d interrupt_req=%d\n",
+ D(fprintf (logfile, "exception index=%d interrupt_req=%d\n",
env->exception_index,
env->interrupt_request));
@@ -133,8 +139,9 @@ void do_interrupt(CPUState *env)
}
if ((env->pregs[PR_CCS] & U_FLAG)) {
- D(fprintf(logfile, "excp isr=%x PC=%x ERP=%x pid=%x ccs=%x cc=%d %x\n",
+ D(fprintf(logfile, "excp isr=%x PC=%x SP=%x ERP=%x pid=%x ccs=%x cc=%d %x\n",
ex_vec, env->pc,
+ env->regs[R_SP],
env->pregs[PR_ERP], env->pregs[PR_PID],
env->pregs[PR_CCS],
env->cc_op, env->cc_mask));
diff --git a/target-cris/mmu.c b/target-cris/mmu.c
index ac711fb..a17d21d 100644
--- a/target-cris/mmu.c
+++ b/target-cris/mmu.c
@@ -32,12 +32,12 @@
#define D(x)
-static int cris_mmu_enabled(uint32_t rw_gc_cfg)
+static inline int cris_mmu_enabled(uint32_t rw_gc_cfg)
{
return (rw_gc_cfg & 12) != 0;
}
-static int cris_mmu_segmented_addr(int seg, uint32_t rw_mm_cfg)
+static inline int cris_mmu_segmented_addr(int seg, uint32_t rw_mm_cfg)
{
return (1 << seg) & rw_mm_cfg;
}
@@ -187,15 +187,26 @@ static int cris_mmu_translate_page(struct cris_mmu_result_t *res,
set_exception_vector(0x0a, d_mmu_access);
set_exception_vector(0x0b, d_mmu_write);
*/
- if (!tlb_g
+ if (!tlb_g
&& tlb_pid != (env->pregs[PR_PID] & 0xff)) {
D(printf ("tlb: wrong pid %x %x pc=%x\n",
tlb_pid, env->pregs[PR_PID], env->pc));
match = 0;
res->bf_vec = vect_base;
+ } else if (cfg_k && tlb_k && usermode) {
+ D(printf ("tlb: kernel protected %x lo=%x pc=%x\n",
+ vaddr, lo, env->pc));
+ match = 0;
+ res->bf_vec = vect_base + 2;
} else if (rw == 1 && cfg_w && !tlb_w) {
- D(printf ("tlb: write protected %x lo=%x\n",
- vaddr, lo));
+ D(printf ("tlb: write protected %x lo=%x pc=%x\n",
+ vaddr, lo, env->pc));
+ match = 0;
+ /* write accesses never go through the I mmu. */
+ res->bf_vec = vect_base + 3;
+ } else if (rw == 2 && cfg_x && !tlb_x) {
+ D(printf ("tlb: exec protected %x lo=%x pc=%x\n",
+ vaddr, lo, env->pc));
match = 0;
res->bf_vec = vect_base + 3;
} else if (cfg_v && !tlb_v) {
diff --git a/target-cris/op_helper.c b/target-cris/op_helper.c
index 7c629c7..dfc213c 100644
--- a/target-cris/op_helper.c
+++ b/target-cris/op_helper.c
@@ -60,8 +60,8 @@ void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
saved_env = env;
env = cpu_single_env;
- D(fprintf(logfile, "%s ra=%x acr=%x %x\n", __func__, retaddr,
- env->regs[R_ACR], saved_env->regs[R_ACR]));
+ D(fprintf(logfile, "%s pc=%x tpc=%x ra=%x\n", __func__,
+ env->pc, env->debug1, retaddr));
ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
if (__builtin_expect(ret, 0)) {
if (retaddr) {
@@ -89,7 +89,7 @@ void helper_tlb_update(uint32_t T0)
return;
vaddr = cris_mmu_tlb_latest_update(env, T0);
- D(printf("flush old_vaddr=%x vaddr=%x T0=%x\n", vaddr,
+ D(fprintf(logfile, "flush old_vaddr=%x vaddr=%x T0=%x\n", vaddr,
env->sregs[SFR_R_MM_CAUSE] & TARGET_PAGE_MASK, T0));
tlb_flush_page(env, vaddr);
#endif
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