+ commpage_update_kdebug_state();
+#if CONFIG_ATM
+ commpage_update_atm_diagnostic_config(atm_get_diagnostic_config());
+#endif
+}
+
+/* Fill in the common routines during kernel initialization.
+ * This is called before user-mode code is running.
+ */
+void commpage_text_populate( void ){
+ commpage_descriptor **rd;
+
+ next = 0;
+ commPagePtr = (char *) commpage_allocate(commpage_text32_map, (vm_size_t) _COMM_PAGE_TEXT_AREA_USED, VM_PROT_READ | VM_PROT_EXECUTE);
+ commPageTextPtr32 = commPagePtr;
+
+ char *cptr = commPagePtr;
+ int i=0;
+ for(; i< _COMM_PAGE_TEXT_AREA_USED; i++){
+ cptr[i]=0xCC;
+ }
+
+ commPageBaseOffset = _COMM_PAGE_TEXT_START;
+ for (rd = commpage_32_routines; *rd != NULL; rd++) {
+ commpage_stuff_routine(*rd);
+ }
+
+#ifndef __LP64__
+ pmap_commpage32_init((vm_offset_t) commPageTextPtr32, _COMM_PAGE_TEXT_START,
+ _COMM_PAGE_TEXT_AREA_USED/INTEL_PGBYTES);
+#endif
+
+ if (_cpu_capabilities & k64Bit) {
+ next = 0;
+ commPagePtr = (char *) commpage_allocate(commpage_text64_map, (vm_size_t) _COMM_PAGE_TEXT_AREA_USED, VM_PROT_READ | VM_PROT_EXECUTE);
+ commPageTextPtr64 = commPagePtr;
+
+ cptr=commPagePtr;
+ for(i=0; i<_COMM_PAGE_TEXT_AREA_USED; i++){
+ cptr[i]=0xCC;
+ }
+
+ for (rd = commpage_64_routines; *rd !=NULL; rd++) {
+ commpage_stuff_routine(*rd);
+ }
+
+#ifndef __LP64__
+ pmap_commpage64_init((vm_offset_t) commPageTextPtr64, _COMM_PAGE_TEXT_START,
+ _COMM_PAGE_TEXT_AREA_USED/INTEL_PGBYTES);
+#endif
+ }
+
+ if (next > _COMM_PAGE_TEXT_END)
+ panic("commpage text overflow: next=0x%08x, commPagePtr=%p", next, commPagePtr);
+
+}
+
+/* Update commpage nanotime information.
+ *
+ * This routine must be serialized by some external means, ie a lock.
+ */
+
+void
+commpage_set_nanotime(
+ uint64_t tsc_base,
+ uint64_t ns_base,
+ uint32_t scale,
+ uint32_t shift )
+{
+ commpage_time_data *p32 = time_data32;
+ commpage_time_data *p64 = time_data64;
+ static uint32_t generation = 0;
+ uint32_t next_gen;
+
+ if (p32 == NULL) /* have commpages been allocated yet? */
+ return;
+
+ if ( generation != p32->nt_generation )
+ panic("nanotime trouble 1"); /* possibly not serialized */
+ if ( ns_base < p32->nt_ns_base )
+ panic("nanotime trouble 2");
+ if ((shift != 0) && ((_cpu_capabilities & kSlow)==0) )
+ panic("nanotime trouble 3");
+
+ next_gen = ++generation;
+ if (next_gen == 0)
+ next_gen = ++generation;
+
+ p32->nt_generation = 0; /* mark invalid, so commpage won't try to use it */
+ p64->nt_generation = 0;
+
+ p32->nt_tsc_base = tsc_base;
+ p64->nt_tsc_base = tsc_base;
+
+ p32->nt_ns_base = ns_base;
+ p64->nt_ns_base = ns_base;
+
+ p32->nt_scale = scale;
+ p64->nt_scale = scale;
+
+ p32->nt_shift = shift;
+ p64->nt_shift = shift;
+
+ p32->nt_generation = next_gen; /* mark data as valid */
+ p64->nt_generation = next_gen;
+}
+
+
+/* Disable commpage gettimeofday(), forcing commpage to call through to the kernel. */
+
+void
+commpage_disable_timestamp( void )
+{
+ time_data32->gtod_generation = 0;
+ time_data64->gtod_generation = 0;
+}
+
+
+/* Update commpage gettimeofday() information. As with nanotime(), we interleave
+ * updates to the 32- and 64-bit commpage, in order to keep time more nearly in sync
+ * between the two environments.
+ *
+ * This routine must be serializeed by some external means, ie a lock.
+ */
+
+ void
+ commpage_set_timestamp(
+ uint64_t abstime,
+ uint64_t secs )
+{
+ commpage_time_data *p32 = time_data32;
+ commpage_time_data *p64 = time_data64;
+ static uint32_t generation = 0;
+ uint32_t next_gen;
+
+ next_gen = ++generation;
+ if (next_gen == 0)
+ next_gen = ++generation;
+
+ p32->gtod_generation = 0; /* mark invalid, so commpage won't try to use it */
+ p64->gtod_generation = 0;
+
+ p32->gtod_ns_base = abstime;
+ p64->gtod_ns_base = abstime;
+
+ p32->gtod_sec_base = secs;
+ p64->gtod_sec_base = secs;
+
+ p32->gtod_generation = next_gen; /* mark data as valid */
+ p64->gtod_generation = next_gen;
+}
+
+
+/* Update _COMM_PAGE_MEMORY_PRESSURE. Called periodically from vm's compute_memory_pressure() */
+
+void
+commpage_set_memory_pressure(
+ unsigned int pressure )
+{
+ char *cp;
+ uint32_t *ip;
+
+ cp = commPagePtr32;
+ if ( cp ) {
+ cp += (_COMM_PAGE_MEMORY_PRESSURE - _COMM_PAGE32_BASE_ADDRESS);
+ ip = (uint32_t*) (void *) cp;
+ *ip = (uint32_t) pressure;
+ }
+
+ cp = commPagePtr64;
+ if ( cp ) {
+ cp += (_COMM_PAGE_MEMORY_PRESSURE - _COMM_PAGE32_START_ADDRESS);
+ ip = (uint32_t*) (void *) cp;
+ *ip = (uint32_t) pressure;
+ }
+
+}
+
+
+/* Update _COMM_PAGE_SPIN_COUNT. We might want to reduce when running on a battery, etc. */
+
+void
+commpage_set_spin_count(
+ unsigned int count )
+{
+ char *cp;
+ uint32_t *ip;
+
+ if (count == 0) /* we test for 0 after decrement, not before */
+ count = 1;
+
+ cp = commPagePtr32;
+ if ( cp ) {
+ cp += (_COMM_PAGE_SPIN_COUNT - _COMM_PAGE32_BASE_ADDRESS);
+ ip = (uint32_t*) (void *) cp;
+ *ip = (uint32_t) count;
+ }
+
+ cp = commPagePtr64;
+ if ( cp ) {
+ cp += (_COMM_PAGE_SPIN_COUNT - _COMM_PAGE32_START_ADDRESS);
+ ip = (uint32_t*) (void *) cp;
+ *ip = (uint32_t) count;
+ }
+
+}
+
+/* Updated every time a logical CPU goes offline/online */
+void
+commpage_update_active_cpus(void)
+{
+ char *cp;
+ volatile uint8_t *ip;
+
+ /* At least 32-bit commpage must be initialized */
+ if (!commPagePtr32)
+ return;
+
+ simple_lock(&commpage_active_cpus_lock);
+
+ cp = commPagePtr32;
+ cp += (_COMM_PAGE_ACTIVE_CPUS - _COMM_PAGE32_BASE_ADDRESS);
+ ip = (volatile uint8_t*) cp;
+ *ip = (uint8_t) processor_avail_count;
+
+ cp = commPagePtr64;
+ if ( cp ) {
+ cp += (_COMM_PAGE_ACTIVE_CPUS - _COMM_PAGE32_START_ADDRESS);
+ ip = (volatile uint8_t*) cp;
+ *ip = (uint8_t) processor_avail_count;
+ }
+
+ simple_unlock(&commpage_active_cpus_lock);
+}
+
+/*
+ * Update the commpage with current kdebug state. This currently has bits for
+ * global trace state, and typefilter enablement. It is likely additional state
+ * will be tracked in the future.
+ *
+ * INVARIANT: This value will always be 0 if global tracing is disabled. This
+ * allows simple guard tests of "if (*_COMM_PAGE_KDEBUG_ENABLE) { ... }"
+ */
+void
+commpage_update_kdebug_state(void)
+{
+ volatile uint32_t *saved_data_ptr;
+ char *cp;
+
+ cp = commPagePtr32;
+ if (cp) {
+ cp += (_COMM_PAGE_KDEBUG_ENABLE - _COMM_PAGE32_BASE_ADDRESS);
+ saved_data_ptr = (volatile uint32_t *)cp;
+ *saved_data_ptr = kdebug_commpage_state();
+ }
+
+ cp = commPagePtr64;
+ if (cp) {
+ cp += (_COMM_PAGE_KDEBUG_ENABLE - _COMM_PAGE32_START_ADDRESS);
+ saved_data_ptr = (volatile uint32_t *)cp;
+ *saved_data_ptr = kdebug_commpage_state();
+ }
projects / apple / xnu.git / blobdiff