From: Alan Cox <alan@linux.intel.com>
Date: Mon, 20 Aug 2018 23:04:13 +0000 (+0100)
Subject: sam: add a low 512 byte buffer ready for ramdisk support
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=5e45893ced38740b01717dc0db3dfe40e46b8502;p=FUZIX.git

sam: add a low 512 byte buffer ready for ramdisk support
---

diff --git a/Kernel/platform-sam/crt0.s b/Kernel/platform-sam/crt0.s
index 6f9d6f5d..41c47fe1 100644
--- a/Kernel/platform-sam/crt0.s
+++ b/Kernel/platform-sam/crt0.s
@@ -39,6 +39,9 @@
 		.globl s__INITIALIZER
 	        .globl kstack_top
 
+		; export the buffer
+		.globl _low_bounce;
+
 	        ; startup code
 	        .area _CODE
 
@@ -63,3 +66,10 @@ start:
 		di
 stop:		halt
 		jr stop
+
+;
+;	Low memory bounce buffer/scratch stack space. Define it here so we
+;	are sure it's below the 32K line.
+;
+_low_bounce:
+		.ds 512