From c32b1efa43e31bd9a8a7eae3623664d00c34d842 Mon Sep 17 00:00:00 2001
From: Alan Cudmore <alan.cudmore@gmail.com>
Date: Sat, 23 Mar 2013 19:13:07 +0100
Subject: bsp/raspberrypi: New BSP

---
 .../libbsp/arm/raspberrypi/startup/bspstarthooks.c | 114 +++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c

(limited to 'c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c')

diff --git a/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c b/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c
new file mode 100644
index 0000000000..6f57264119
--- /dev/null
+++ b/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c
@@ -0,0 +1,114 @@
+/**
+ * @file
+ *
+ * @ingroup raspberrypi
+ *
+ * @brief Startup code.
+ */
+
+/*
+ * Copyright (c) 2013 by Alan Cudmore
+ * based on work by:
+ * Copyright (c) 2009
+ * embedded brains GmbH
+ * Obere Lagerstr. 30
+ * D-82178 Puchheim
+ * Germany
+ * <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE
+ */
+
+#include <stdbool.h>
+
+#include <bspopts.h>
+#include <bsp/start.h>
+#include <bsp/raspberrypi.h>
+#include <bsp/mmu.h>
+#include <bsp/linker-symbols.h>
+#include <bsp/uart-output-char.h>
+
+static void BSP_START_TEXT_SECTION clear_bss(void)
+{
+  const int *end = (const int *) bsp_section_bss_end;
+  int *out = (int *) bsp_section_bss_begin;
+
+  /* Clear BSS */
+  while (out != end) {
+    *out = 0;
+    ++out;
+  }
+}
+
+static void BSP_START_TEXT_SECTION raspberrypi_cache_setup(void)
+{
+  uint32_t ctrl = 0;
+
+  /* Disable MMU and cache, basic settings */
+  ctrl = arm_cp15_get_control();
+  ctrl &= ~(ARM_CP15_CTRL_I | ARM_CP15_CTRL_R | ARM_CP15_CTRL_C
+    | ARM_CP15_CTRL_V | ARM_CP15_CTRL_M);
+  ctrl |= ARM_CP15_CTRL_S | ARM_CP15_CTRL_A;
+  arm_cp15_set_control(ctrl);
+
+  arm_cp15_cache_invalidate();
+  arm_cp15_tlb_invalidate();
+
+}
+
+
+void BSP_START_TEXT_SECTION bsp_start_hook_0(void)
+{
+  raspberrypi_cache_setup();
+}
+
+
+void BSP_START_TEXT_SECTION bsp_start_hook_1(void)
+{
+
+    /* Copy .text section */
+    arm_cp15_instruction_cache_invalidate();
+    bsp_start_memcpy(
+                     (int *) bsp_section_text_begin,
+                     (const int *) bsp_section_text_load_begin,
+                     (size_t) bsp_section_text_size
+                     );
+
+    /* Copy .rodata section */
+    arm_cp15_instruction_cache_invalidate();
+    bsp_start_memcpy(
+                     (int *) bsp_section_rodata_begin,
+                     (const int *) bsp_section_rodata_load_begin,
+                     (size_t) bsp_section_rodata_size
+                     );
+
+    /* Copy .data section */
+    arm_cp15_instruction_cache_invalidate();
+    bsp_start_memcpy(
+                     (int *) bsp_section_data_begin,
+                     (const int *) bsp_section_data_load_begin,
+                     (size_t) bsp_section_data_size
+                     );
+
+    /* Copy .fast_text section */
+    arm_cp15_instruction_cache_invalidate();
+    bsp_start_memcpy(
+                     (int *) bsp_section_fast_text_begin,
+                     (const int *) bsp_section_fast_text_load_begin,
+                     (size_t) bsp_section_fast_text_size
+                     );
+
+    /* Copy .fast_data section */
+    arm_cp15_instruction_cache_invalidate();
+    bsp_start_memcpy(
+                     (int *) bsp_section_fast_data_begin,
+                     (const int *) bsp_section_fast_data_load_begin,
+                     (size_t) bsp_section_fast_data_size
+                     );
+
+  /* Clear .bss section */
+  clear_bss();
+
+}
-- 
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