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 +1,90 @@
+#include <utsm/dkm.h>
+#include <utsm/log.h>
+#include <utsm/idt.h>
+#include <utsm/net.h>
+
+static void dkm_api_info(const char *msg) {
+    log_info(msg);
+}
+
+static void dkm_api_warn(const char *msg) {
+    log_warn(msg);
+}
+
+static void dkm_api_error(const char *msg) {
+    log_error(msg);
+}
+
+static void dkm_api_panic(const char *msg) {
+    log_error(msg);
+    for (;;) {
+        __asm__ volatile("cli; hlt");
+    }
+}
+
+static const dkm_log_api g_log_api = {
+    .info = dkm_api_info,
+    .warn = dkm_api_warn,
+    .error = dkm_api_error,
+    .panic = dkm_api_panic
+};
+
+static dkm_kernel_api g_kernel_api = {
+    .version = DKM_KERNEL_API_VERSION,
+    .size = sizeof(dkm_kernel_api),
+    .feature_bits = 0,
+    .log = &g_log_api,
+    .mem = 0,
+    .utsm = 0,
+    .irq = 0,
+    .pci = 0,
+    .dma = 0,
+    .vfs = 0,
+    .net = 0,
+    .timer = 0,
+    .drr = 0,
+    .rsdp_address = 0,
+    .fb_address = 0,
+    .fb_width = 0,
+    .fb_height = 0,
+    .fb_pitch = 0,
+    .fb_bpp = 0,
+    .boot_modules_response = 0,
+    .irq_register = 0,
+    .hhdm_offset = 0,
+    .block = 0
+};
+
+const dkm_kernel_api *dkm_get_kernel_api(void) {
+    return &g_kernel_api;
+}
+
+#include "../arch/x86_64/limine.h"
+extern volatile struct limine_rsdp_request g_rsdp_request;
+extern volatile struct limine_framebuffer_request g_fb_request;
+extern volatile struct limine_module_request g_module_request;
+extern volatile struct limine_hhdm_request g_hhdm_request;
+
+void dkm_fill_platform_info(void) {
+    g_kernel_api.dma = dma_get_api();
+    g_kernel_api.net = net_get_api();
+    g_kernel_api.block = block_get_api();
+    if (g_rsdp_request.response && g_rsdp_request.response->address) {
+        g_kernel_api.rsdp_address = g_rsdp_request.response->address;
+    }
+    if (g_fb_request.response && g_fb_request.response->framebuffer_count > 0) {
+        struct limine_framebuffer *fb = g_fb_request.response->framebuffers[0];
+        g_kernel_api.fb_address = fb->address;
+        g_kernel_api.fb_width = fb->width;
+        g_kernel_api.fb_height = fb->height;
+        g_kernel_api.fb_pitch = fb->pitch;
+        g_kernel_api.fb_bpp = fb->bpp;
+    }
+    if (g_module_request.response) {
+        g_kernel_api.boot_modules_response = g_module_request.response;
+    }
+    g_kernel_api.irq_register = (int (*)(u8,void*))((u64)irq_register);
+    if (g_hhdm_request.response) {
+        g_kernel_api.hhdm_offset = g_hhdm_request.response->offset;
+    }
+}