From 0a0682474e6326f63994a6cd62f23efd9818a7ec Mon Sep 17 00:00:00 2001
From: Marcoen Hirschberg <marcoen@gmail.com>
Date: Sat, 12 Aug 2006 08:27:48 +0000
Subject: initial gigabeat bootloader (only test code)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10536 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/boot.lds | 32 +++++++++++++++++++++++++++++++-
 firmware/crt0.S   |  5 +++++
 firmware/kernel.c | 19 +++++++++++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)

(limited to 'firmware')

diff --git a/firmware/boot.lds b/firmware/boot.lds
index 78dd40bf92..56383d7723 100644
--- a/firmware/boot.lds
+++ b/firmware/boot.lds
@@ -69,7 +69,7 @@ INPUT(crt0.o)
 #define FLASHSIZE 256K - ROM_START
 #endif
 
-#ifndef CPU_PP
+#if !defined(CPU_PP) && (CONFIG_CPU!=S3C2440)
 MEMORY
 {
    DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
@@ -117,6 +117,36 @@ SECTIONS
      _end = .;
    }
 }
+#elif (CONFIG_CPU==S3C2440)
+{
+  . = DRAMORIG + 0x8000;
+  .text : {
+    *(.init.text)
+    *(.text)
+  }
+  .data : {
+    *(.icode)
+    *(.irodata)
+    *(.idata)
+    *(.data)
+    _dataend = . ;
+   }
+  .stack :
+  {
+     *(.stack)
+     _stackbegin = .;
+     stackbegin = .;
+     . += 0x2000;
+     _stackend = .;
+     stackend = .;
+  }
+  .bss : {
+     _edata = .;
+     *(.bss);
+     *(.ibss);
+     _end = .;
+   }
+}
 #else
 {
     .vectors :
diff --git a/firmware/crt0.S b/firmware/crt0.S
index 1c52658c7c..96e08be9f1 100644
--- a/firmware/crt0.S
+++ b/firmware/crt0.S
@@ -303,6 +303,11 @@ boot_table:
     .space 400
 #endif /* PP specific */
 /* Code for ARM bootloader targets other than iPod go here */
+
+#if CONFIG_CPU == S3C2440
+    bl main
+#endif
+
 #else /* BOOTLOADER */
     
     /* Set up stack for IRQ mode */ 
diff --git a/firmware/kernel.c b/firmware/kernel.c
index 7c5c74c662..1c8bf9dd81 100644
--- a/firmware/kernel.c
+++ b/firmware/kernel.c
@@ -56,6 +56,21 @@ void kernel_init(void)
 
 void sleep(int ticks)
 {
+#if CONFIG_CPU == S3C2440 && defined(BOOTLOADER)
+    int counter;
+    TCON &= ~(1 << 20); // stop timer 4
+    // TODO: this constant depends on dividers settings inherited from
+    // firmware. Set them explicitly somwhere.
+    TCNTB4 = 12193 * ticks / HZ;
+    TCON |= 1 << 21; // set manual bit
+    TCON &= ~(1 << 21); // reset manual bit
+    TCON &= ~(1 << 22); //autoreload Off
+    TCON |= (1 << 20); // start timer 4
+    do {
+       counter = TCNTO4;
+    } while(counter > 0);
+
+#else
     /* Always sleep at least 1 tick */
     int timeout = current_tick + ticks + 1;
 
@@ -63,12 +78,16 @@ void sleep(int ticks)
         sleep_thread();
     }
     wake_up_thread();
+#endif
 }
 
 void yield(void)
 {
+#if CONFIG_CPU == S3C2440 && defined(BOOTLOADER)
+#else
     switch_thread();
     wake_up_thread();
+#endif
 }
 
 /****************************************************************************
-- 
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