Record networking and DMA development progress

Add the current OS source tree, build scripts, system image layout, and development notes covering DMA page allocation, e1000 bring-up, net API dispatch, and DHCP work in progress.
2026-07-02 16:17:09 +08:00
parent fbc14631e3
commit f1a2a110d7
182 changed files with 16472 additions and 0 deletions
@@ -0,0 +1,36 @@
+#include <utsm/pckc.h>
+#include <utsm/segment.h>
+#include <utsm/config.h>
+
+static utsm_pckc g_pckc;
+
+void utsm_pckc_init(void) {
+    g_pckc.current_process_uuid = uuid_make_test(0);
+    g_pckc.hit_count = 0;
+    g_pckc.miss_count = 0;
+    g_pckc.next_replace = 0;
+    for (u32 i = 0; i < UTSM_MAX_PCKC_KEYS; i++) {
+        g_pckc.entries[i].valid = false;
+    }
+}
+
+int utsm_pckc_get_or_derive(u32 segment_slot, utsm_segment_desc *desc, utsm_key_material *out_key) {
+    for (u32 i = 0; i < UTSM_MAX_PCKC_KEYS; i++) {
+        utsm_pckc_entry *entry = &g_pckc.entries[i];
+        if (entry->valid && entry->segment_slot == segment_slot && entry->key_epoch == desc->key_epoch) {
+            *out_key = entry->key;
+            g_pckc.hit_count++;
+            return UTSM_OK;
+        }
+    }
+
+    g_pckc.miss_count++;
+    u32 idx = g_pckc.next_replace++ % UTSM_MAX_PCKC_KEYS;
+    utsm_pckc_entry *entry = &g_pckc.entries[idx];
+    entry->valid = true;
+    entry->segment_slot = segment_slot;
+    entry->key_epoch = desc->key_epoch;
+    utsm_kdf_segment_key(desc->owner_process_uuid, desc->segment_uuid, desc->key_epoch, &entry->key);
+    *out_key = entry->key;
+    return UTSM_OK;
+}