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 +1,67 @@
+#include <utsm/dkm.h>
+#include <utsm/log.h>
+
+static int dkm_validate_desc(const dkm_driver_desc *desc) {
+    if (!desc) {
+        return -1;
+    }
+    if (desc->magic != DKM_DRIVER_MAGIC) {
+        return -2;
+    }
+    if (desc->abi_version != DKM_ABI_VERSION) {
+        return -3;
+    }
+    if (desc->desc_size < sizeof(dkm_driver_desc)) {
+        return -4;
+    }
+    if (!desc->name || !desc->version) {
+        return -5;
+    }
+    return 0;
+}
+
+void dkm_init(void) {
+    log_info("[DKM] init begin");
+    int status = dkm_load_builtin(&dkm_builtin_console_early);
+    if (status == 0) {
+        log_info("[DKM] init ok");
+    } else {
+        log_error("[DKM] init failed");
+    }
+}
+
+int dkm_load_builtin(const dkm_builtin_driver *driver) {
+    if (!driver || !driver->desc || !driver->init) {
+        log_error("[DKM] invalid builtin driver");
+        return -1;
+    }
+
+    int status = dkm_validate_desc(driver->desc);
+    if (status != 0) {
+        log_error("[DKM] driver_desc rejected");
+        return status;
+    }
+
+    dkm_driver_handle handle;
+    handle.desc = driver->desc;
+    handle.state = DKM_STATE_ABI_CHECKED;
+    handle.init_status = 0;
+    handle.load_stage = driver->desc->stage;
+    handle.flags = driver->desc->flags;
+
+    log_info("[DKM] builtin driver init begin");
+    log_info(driver->desc->name);
+    handle.state = DKM_STATE_INITING;
+    status = driver->init(dkm_get_kernel_api(), &handle);
+    handle.init_status = status;
+
+    if (status != 0) {
+        handle.state = DKM_STATE_FAILED;
+        log_error("[DKM] builtin driver init failed");
+        return status;
+    }
+
+    handle.state = DKM_STATE_ACTIVE;
+    log_info("[DKM] builtin driver active");
+    return 0;
+}