create wdt device discovery

discuss: per wrv32em status, consider moving custom wdt format to dtb or
pci device discovery (potentially both: we have the framework for pci.ko
extension after using dtb to discover memory and pci devices)

1 files changed, 32 insertions, 0 deletions

diff --git a/kernel/mem.c b/kernel/mem.c
new file mode 100644
index 0000000..531dd81
--- /dev/null
+++ b/kernel/mem.c
@@ -0,0 +1,32 @@
+#include <types.h>
+#include <mem.h>
+
+static char eheap[EHEAP_SIZE] = {0};
+static size_t eheap_off = 0;
+
+void* kmalloc(size_t size) {
+    return (void*)size;
+}
+
+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;
+}
+
+void* memcpy(void *to, const void *from, size_t size) {
+    char *dest = (char *)to;
+    const char *src = (const char *)from;
+
+    while (size--) {
+        *dest++ = *src++;
+    }
+
+    return dest;
+}