Squash commits for public release

boot/libboot/devtree/devtree.c

@@ -0,0 +1,52 @@
+#include "devtree.h"
+#include <libboot/log/log.h>
+#include <libboot/mem/mem.h>
+
+static size_t _devtree_size = 0;
+static devtree_header_t* _devtree_header = NULL;
+static devtree_entry_t* _devtree_body = NULL;
+static char* _devtree_name_section = NULL;
+
+void* devtree_start()
+{
+    return (void*)_devtree_header;
+}
+
+size_t devtree_size()
+{
+    return _devtree_size;
+}
+
+int devtree_init(void* devtree, size_t size)
+{
+    if (!devtree) {
+        return 0;
+    }
+
+    devtree_header_t* dth = (devtree_header_t*)devtree;
+    _devtree_header = dth;
+    _devtree_body = (devtree_entry_t*)&dth[1];
+    _devtree_name_section = ((char*)dth + dth->name_list_offset);
+    _devtree_size = size;
+    return 0;
+}
+
+const char* devtree_name_of_entry(devtree_entry_t* en)
+{
+    return &_devtree_name_section[en->rel_name_offset];
+}
+
+devtree_entry_t* devtree_find_device(const char* name)
+{
+    if (!_devtree_body) {
+        return NULL;
+    }
+
+    for (int i = 0; i < _devtree_header->entries_count; i++) {
+        const char* curdev_name = devtree_name_of_entry(&_devtree_body[i]);
+        if (strcmp(curdev_name, name) == 0) {
+            return &_devtree_body[i];
+        }
+    }
+    return NULL;
+}

boot/libboot/devtree/devtree.h

@@ -0,0 +1,50 @@
+#ifndef _BOOT_LIBBOOT_DEVTREE_DEVTREE_H
+#define _BOOT_LIBBOOT_DEVTREE_DEVTREE_H
+
+#include <libboot/mem/mem.h>
+#include <libboot/types.h>
+
+#define DEVTREE_HEADER_SIGNATURE ("odtr3")
+#define DEVTREE_HEADER_SIGNATURE_LEN (sizeof(DEVTREE_HEADER_SIGNATURE) - 1)
+
+struct PACKED devtree_header {
+    char signature[8];
+    uint32_t revision;
+    uint32_t flags;
+    uint32_t entries_count;
+    uint32_t name_list_offset;
+};
+typedef struct devtree_header devtree_header_t;
+
+#define DEVTREE_ENTRY_FLAGS_MMIO = (1 << 0)
+#define DEVTREE_ENTRY_TYPE_IO (0)
+#define DEVTREE_ENTRY_TYPE_FB (1)
+#define DEVTREE_ENTRY_TYPE_UART (2)
+#define DEVTREE_ENTRY_TYPE_RAM (3)
+#define DEVTREE_ENTRY_TYPE_STORAGE (4)
+#define DEVTREE_ENTRY_TYPE_BUS_CONTROLLER (5)
+#define DEVTREE_ENTRY_TYPE_RTC (6)
+
+struct PACKED devtree_entry {
+    uint32_t type;
+    uint32_t flags;
+    uint64_t region_base;
+    uint64_t region_size;
+    uint32_t irq_lane;
+    uint32_t irq_flags;
+    uint32_t irq_priority;
+    uint32_t rel_name_offset;
+    uint64_t aux1;
+    uint64_t aux2;
+    uint64_t aux3;
+    uint64_t aux4;
+};
+typedef struct devtree_entry devtree_entry_t;
+
+int devtree_init(void* devtree, size_t size);
+const char* devtree_name_of_entry(devtree_entry_t* en);
+devtree_entry_t* devtree_find_device(const char* name);
+void* devtree_start();
+size_t devtree_size();
+
+#endif // _BOOT_LIBBOOT_DEVTREE_DEVTREE_H