PA2.0 provides 8 instead of 4 PID registers.
Signed-off-by: Sven Schnelle <sv...@stackframe.org>
---
target/hppa/mem_helper.c | 59 +++++++++++++++++++++++++++++++++-------
1 file changed, 49 insertions(+), 10 deletions(-)
diff --git a/target/hppa/mem_helper.c b/target/hppa/mem_helper.c
index 80f51e753f..f89ba91b20 100644
--- a/target/hppa/mem_helper.c
+++ b/target/hppa/mem_helper.c
@@ -152,6 +152,49 @@ static HPPATLBEntry *hppa_alloc_tlb_ent(CPUHPPAState *env)
return ent;
}
+#define ACCESS_ID_MASK 0xffff
+
+/* Return the set of protections allowed by a PID match. */
+static int match_prot_id_1(uint32_t access_id, uint32_t prot_id)
+{
+ if (((access_id ^ (prot_id >> 1)) & ACCESS_ID_MASK) == 0) {
+ return (prot_id & 1
+ ? PROT_EXEC | PROT_READ
+ : PROT_EXEC | PROT_READ | PROT_WRITE);
+ }
+ return 0;
+}
+
+static int match_prot_id32(CPUHPPAState *env, uint32_t access_id)
+{
+ int r, i;
+
+ for (i = CR_PID1; i <= CR_PID4; ++i) {
+ r = match_prot_id_1(access_id, env->cr[i]);
+ if (r) {
+ return r;
+ }
+ }
+ return 0;
+}
+
+static int match_prot_id64(CPUHPPAState *env, uint32_t access_id)
+{
+ int r, i;
+
+ for (i = CR_PID1; i <= CR_PID4; ++i) {
+ r = match_prot_id_1(access_id, env->cr[i]);
+ if (r) {
+ return r;
+ }
+ r = match_prot_id_1(access_id, env->cr[i] >> 32);
+ if (r) {
+ return r;
+ }
+ }
+ return 0;
+}
+
int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx,
int type, hwaddr *pphys, int *pprot,
HPPATLBEntry **tlb_entry)
@@ -226,16 +269,12 @@ int hppa_get_physical_address(CPUHPPAState *env, vaddr
addr, int mmu_idx,
/* access_id == 0 means public page and no check is performed */
if (ent->access_id && MMU_IDX_TO_P(mmu_idx)) {
- /* If bits [31:1] match, and bit 0 is set, suppress write. */
- int match = ent->access_id * 2 + 1;
-
- if (match == env->cr[CR_PID1] || match == env->cr[CR_PID2] ||
- match == env->cr[CR_PID3] || match == env->cr[CR_PID4]) {
- prot &= PAGE_READ | PAGE_EXEC;
- if (type == PAGE_WRITE) {
- ret = EXCP_DMPI;
- goto egress;
- }
+ int access_prot = (hppa_is_pa20(env)
+ ? match_prot_id64(env, ent->access_id)
+ : match_prot_id32(env, ent->access_id));
+ if (prot & ~access_prot) {
+ ret = type & PAGE_EXEC ? EXCP_IMP : EXCP_DMPI;
+ goto egress;
}
}
--
2.43.2
