Add a kernel heap

Use the heap API to implement a 100MiB heap to
be used by the kernel code.

Add example usage to src/kernel.c

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/include/mm/kernel_heap.h b/src/include/mm/kernel_heap.h
new file mode 100644
index 0000000..4527a11
--- /dev/null
+++ b/src/include/mm/kernel_heap.h
@@ -0,0 +1,20 @@
+#ifndef KERNEL_HEAP_H
+#define KERNEL_HEAP_H
+
+#include <mm/heap.h>
+
+#define KERNEL_HEAP_SIZE_BYTES	(1024 * 1024 * 100)  /* 100 MiB */
+#define KERNEL_HEAP_ENTRIES (KERNEL_HEAP_SIZE_BYTES / PAGE_SIZE)
+
+/* Addresses taken from OSDev x86 memory map */
+#define KERNEL_HEAP_ADDR	(0x01000000)
+
+/* This should give us 480.5 kiB, enough for the current table size */
+#define KERNEL_HEAP_TBL_ADDR	(0x00007E00)
+
+
+void kernel_heap_init();
+void * kmalloc(size_t size);
+void kfree(void *ptr);
+
+#endif /* KERNEL_HEAP_H */