feature (drivers): created infrastructure to config drivers to load on startup

.gitignore

@@ -2,4 +2,4 @@ build
 cmake-build-debug
 noxos.log
 ramdisk/shell.elf
-ramdisk/*.nxkm
+*.nxkm

build.sh

@@ -56,7 +56,9 @@ libnxdrv_build() {
   cd ../drivers/test
   bash build.sh
   cd ../../kernel
-  cp ../drivers/build/test.nxkm ramdisk/test.nxkm
+
+  mkdir -pv ramdisk/drv/
+  cp ../drivers/build/test.nxkm ramdisk/drv/test.nxkm
 }
 
 shell_build() {

ramdisk/drivers.json

@@ -0,0 +1,5 @@
+{
+  "BOOT": [
+    "/initrd/drv/test.nxkm"
+  ]
+}

ramdisk/noxos.json

@@ -1,9 +1,4 @@
 {
     "PS2_ACPI_VALIDATION": true,
-    "LOG_GRAPHICAL": true,
-
-    "drivers": [
-        "/initrd/drv/test.nxkm",
-        "/initrd/drv/nx_std_fat32.nxkm"
-    ]
+    "LOG_GRAPHICAL": true
 }

src/boot/kmain.c

@@ -84,10 +84,6 @@ void kmain(boot_info_T boot_info) {
 //
 //    syscall_perform(SYSCALL_PROCESS_SIGNAL, pid, PROCESS_SIGNAL_START, 0, 0);
 
-    uint64_t drv_id, fd;
-    syscall_perform(SYSCALL_NX_FS_OPEN, (uint64_t)"/initrd/test.nxkm", 0, (uint64_t)&fd, 0);
-    syscall_perform(SYSCALL_NX_DRV_REGISTER, fd, (uint64_t)&drv_id, 0, 0);
-
     driver_T* resolved = driver_lookup_pci_device(0x8086, 0x2922);
 
     DEBUG("resolved: 0x%x", resolved);

src/drivers/driver.c

@@ -2,9 +2,11 @@
 
 #include <drivers/driver.h>
 #include <drivers/builtin/elf/relocation.h>
+#include <drivers/builtin/json.h>
 #include <utils/logger.h>
 #include <utils/memory.h>
 #include <proc/scheduler.h>
+#include <platform/syscall.h>
 #include <mm/region.h>
 
 driver_manager_T g_driver_manager;
@@ -15,6 +17,47 @@ void driver_manager_init() {
     g_driver_manager.lookup_table_usb    = hashmap_create(DRIVER_MANAGER_HASHMAP_SIZE);
     g_driver_manager.lookup_table_fs_gpt = hashmap_create(DRIVER_MANAGER_HASHMAP_SIZE);
     g_driver_manager.lookup_table_fs_mbr = hashmap_create(DRIVER_MANAGER_HASHMAP_SIZE);
+
+    vfs_node_T* node = vfs_resolve_path(&g_root_fs, "/initrd/drivers.json");
+    if (node == NULL || node->type != VFS_NODE_FILE) {
+        log(LOG_WARNING, "No drivers config file found. !!! THIS WILL VERY LIKELY CAUSE THE OS TO NOT WORK!!!");
+        return;
+    }
+
+    char* buffer = memory_allocate(node->size + 1);
+    vfs_file_read(node, 0, node->size, buffer);
+    buffer[node->size] = 0;
+
+    json_T* json = json_from_string(buffer);
+
+    json_node_T* child = json->root_node->childs_start;
+    while (child != NULL) {
+        if (string_compare("BOOT", child->string)) {
+            if (&child->childs_start[0] == NULL || child->childs_start[0].type != JSON_NODE_ARRAY) {
+                log(LOG_WARNING, "sysconfig -> failed to parse field 'BOOT' (expected array)");
+            } else {
+                log(LOG_INFO, "Loading drivers for level 'BOOT':");
+                json_node_T* array_child = child->childs_start[0].childs_start;
+                while (array_child != NULL) {
+                    uint64_t drv_id, fd;
+                    log(LOG_INFO, "    > %s", array_child->string);
+                    syscall_perform(SYSCALL_NX_FS_OPEN, (uint64_t)array_child->string, 0, (uint64_t)&fd, 0);
+                    syscall_perform(SYSCALL_NX_DRV_REGISTER, fd, (uint64_t)&drv_id, 0, 0);
+                    syscall_perform(SYSCALL_NX_FS_CLOSE, fd, 0, 0, 0);
+                    array_child = array_child->next;
+                }
+            }
+        } else {
+            log(LOG_WARNING, "sysconfig -> skipping field '%s' (unknown identifier)", child->string);
+        }
+
+        child = child->next;
+    }
+
+
+    json_destruct(json);
+
+    memory_free(buffer);
 }
 
 driver_manager_chunk_T* driver_manager_chunk_alloc(driver_manager_chunk_T* prev) {