1 files changed, 49 insertions, 0 deletions
diff --git a/kernel/bump.c b/kernel/bump.c
new file mode 100644
index 0000000..369f92f
--- /dev/null
+++ b/kernel/bump.c
@@ -0,0 +1,49 @@
+#include <bump.h>
+#include <common.h>
+
+static char eheap[EHEAP_SIZE] = {0};
+static size_t eheap_off = 0;
+
+struct mem_info *km_find_memory(struct dt_node *head) {
+    struct dt_node *child = head->children;
+    while (child) {
+        return km_find_memory(child);
+        child = child->next;
+    }
+
+    if (strlen(head->name) != 0) {
+        struct dt_prop *prop_head = head->props;
+        while (prop_head) {
+            if (strcmp(prop_head->name, "device_type") == 0
+                && strcmp(prop_head->value, "memory") == 0) {
+                size_t len = 0;
+                uint32_t *reg = (uint32_t *)dt_get_prop(head, "reg", &len);
+                if (reg && len >= 8) {
+                    uint32_t base = be32_to_cpu(reg[0]);
+                    uint32_t size = be32_to_cpu(reg[1]);
+                    struct mem_info *ret = kemalloc(sizeof(struct mem_info));
+                    ret->start = (void*)base;
+                    ret->size = (size_t)size;
+
+                    return ret;
+                }
+            }
+            prop_head = prop_head->next;
+        }
+    }
+    return NULL;
+} 
+
+
+void* kemalloc(size_t size) {
+    size = (size + 7) & ~7;
+
+    if (eheap_off + size > EHEAP_SIZE) {
+        return NULL;
+    }
+
+    void *ptr = &eheap[eheap_off];
+    eheap_off += size;
+    return ptr;
+}
+