From b916e51292133e9f55a335af1e3344bc62c504f6 Mon Sep 17 00:00:00 2001
From: DizzyOfCRN <DizzyOfCRN@fb15a70f-31f2-0310-bbcc-cdcc74a49acc>
Date: Tue, 28 Oct 2014 09:57:39 +0000
Subject: [PATCH] BROM loads 4K of boot0 code (=bootstrap) make sure the first
 level bootcode fits inside. bootstrap code never returns and is inside boot0
 section, make sure text section is behind boot0. Make also a map file and
 assembler output file.

git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@49730 fb15a70f-31f2-0310-bbcc-cdcc74a49acc
---
 arch/arm-sun4i/bootstrap/bootstrap.c   |  9 ++++++++-
 arch/arm-sun4i/bootstrap/ldscript.lds  | 28 ++++++++++++++++++++++++++++
 arch/arm-sun4i/bootstrap/mmakefile.src |  3 ++-
 3 files changed, 38 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm-sun4i/bootstrap/ldscript.lds

diff --git a/arch/arm-sun4i/bootstrap/bootstrap.c b/arch/arm-sun4i/bootstrap/bootstrap.c
index 99a867892e..826f8be489 100644
--- a/arch/arm-sun4i/bootstrap/bootstrap.c
+++ b/arch/arm-sun4i/bootstrap/bootstrap.c
@@ -6,6 +6,13 @@
     Lang: english
 */
 
-void bootstrap(void) {
+#define asmdelay(t) asm volatile("mov r0, %[value]\n1: sub r0, #1\nbne 1b\n"::[value] "i" (t) : "r0", "cc");
+
+void __attribute__((noreturn, section(".bootstrap"))) bootstrap(void) {
+
+    asmdelay(200);
+    asmdelay(200);
+
     while(1);
 }
+
diff --git a/arch/arm-sun4i/bootstrap/ldscript.lds b/arch/arm-sun4i/bootstrap/ldscript.lds
new file mode 100644
index 0000000000..f3d041f98f
--- /dev/null
+++ b/arch/arm-sun4i/bootstrap/ldscript.lds
@@ -0,0 +1,28 @@
+MEMORY {
+    boot0  (rwx)  : org = 0x00000000 , l = 4K
+    invalid (rwx) : org = 0xdead0000 , l = 0x0
+}
+
+SECTIONS 
+{
+    .boot0 : {
+        *(.bootstrap)
+    } >boot0
+
+    .text : { *(.text*) }
+
+    /* This should cause angry complaints if .data exists
+    * We don't want .bss, and we don't need it.
+    */
+    .bss : {
+        *(.bss)
+    } >invalid
+
+    /* This should cause angry complaints if .data exists
+    * We don't want .data, and we don't need it.
+    */
+    .data : {
+        *(.data)
+    } >invalid
+
+}
diff --git a/arch/arm-sun4i/bootstrap/mmakefile.src b/arch/arm-sun4i/bootstrap/mmakefile.src
index b43f60374b..3d48dc94ca 100644
--- a/arch/arm-sun4i/bootstrap/mmakefile.src
+++ b/arch/arm-sun4i/bootstrap/mmakefile.src
@@ -8,7 +8,8 @@ FILES           := bootstrap
 
 #MM
 sun4i-bootstrap-img: $(foreach f, $(FILES), $(TARGETDIR)/$(f).o $(TARGETDIR)/$(f).d)
-	$(KERNEL_LD) -s --entry=bootstrap $(foreach f, $(FILES), $(TARGETDIR)/$(f).o) -o $(TARGETDIR)/sun4i-bootstrap-img
+	$(KERNEL_LD) -s --entry=bootstrap --script=$(SRCDIR)/$(CURDIR)/ldscript.lds -Map $(TARGETDIR)/sun4i-bootstrap-img.map $(foreach f, $(FILES), $(TARGETDIR)/$(f).o) -L$(AROS_LIB) -o $(TARGETDIR)/sun4i-bootstrap-img
+	$(OBJDUMP) -D $(TARGETDIR)/sun4i-bootstrap-img >>$(TARGETDIR)/sun4i-bootstrap-img.asm
 	$(TARGET_OBJCOPY) -O binary $(TARGETDIR)/sun4i-bootstrap-img
 	$(MKSUNXIBOOT) $(TARGETDIR)/sun4i-bootstrap-img $(AROSDIR)/sun4i-bootstrap-img
 
-- 
2.11.4.GIT