From 3f2ac2db360c6687995a9e7ed14cb15007cc0a4e Mon Sep 17 00:00:00 2001
From: Curle <curle@gemwire.uk>
Date: Mon, 9 Nov 2020 18:48:47 +0000
Subject: [PATCH] Add a memstart symbol to the linkerscript

This replaces the old way of appending the memory bitmap to the end of the kernel, which started causing problems with expansion..

I hardcoded the value to 0x1440, which is the start of the first FREE block of memory given to SeaBIOS in QEMU. This should be changed in the future..
---
 chroma/inc/kernel/system/memory.h | 2 ++
 linker.ld                         | 5 +++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/chroma/inc/kernel/system/memory.h b/chroma/inc/kernel/system/memory.h
index 6641705..93a1669 100644
--- a/chroma/inc/kernel/system/memory.h
+++ b/chroma/inc/kernel/system/memory.h
@@ -199,6 +199,8 @@ void* AlignPointer(const void* Pointer, size_t Alignment);
 *      C h r o m a    M e m o r y   M a n a g e m e n t
 *************************************************************/
 
+extern size_t memstart;
+
 extern size_t end;
 
 void        ListMemoryMap();
diff --git a/linker.ld b/linker.ld
index 8b4ac16..ea78291 100644
--- a/linker.ld
+++ b/linker.ld
@@ -1,6 +1,7 @@
 
-mmio = 0xfffffffff8000000;
-fb   = 0xfffffffffc000000;
+memstart = 0x14400;
+mmio     = 0xfffffffff8000000;
+fb       = 0xfffffffffc000000;
 
 PHDRS
 {