bsps: Move start files to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

1 files changed, 167 insertions, 0 deletions

diff --git a/bsps/epiphany/epiphany_sim/start/start.S b/bsps/epiphany/epiphany_sim/start/start.S
new file mode 100644
index 0000000000..7f828ae151
--- /dev/null
+++ b/bsps/epiphany/epiphany_sim/start/start.S
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2015 University of York.
+ * Hesham ALMatary <hmka501@york.ac.uk>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <bsp/linker-symbols.h>
+#include <rtems/asm.h>
+
+EXTERN(bsp_section_bss_begin)
+EXTERN(bsp_section_bss_end)
+EXTERN(_ISR_Handler)
+EXTERN(bsp_start_vector_table_end)
+EXTERN(bsp_start_vector_table_size)
+EXTERN(bsp_vector_table_size)
+EXTERN(bsp_section_stack_begin)
+
+PUBLIC(_EPIPHANY_Exception_default)
+PUBLIC(bsp_start_vector_table_begin)
+PUBLIC(_start)
+
+.section .vector, "wax"
+TYPE_FUNC(_start)
+SYM(_start):
+  .balign 4 ;
+    b .normal_start
+
+  .balign 4 ; 0x4
+    b .sw_exception
+
+  .balign 4 ; 0x8
+    b .normal_start
+
+  .balign 4 ; 0xc
+    b .clock_isr
+
+  .balign 4 ; 0x10
+    b .timer1_isr
+
+  .balign 4 ; 0x14
+    b _EPIPHANY_Exception_default
+
+  .balign 4 ; 0x18
+    b _EPIPHANY_Exception_default
+
+  .balign 4 ; 0x1c
+    b _EPIPHANY_Exception_default
+
+  .balign 4 ; 0x20
+    b _EPIPHANY_Exception_default
+
+  .balign 4 ; 0x24
+    b _EPIPHANY_Exception_default
+
+bsp_start_vector_table_begin:
+  .word .normal_start /* Reset */
+  .word _EPIPHANY_Exception_default /* SW exception */
+  .word _EPIPHANY_Exception_default /* Data Page Fault */
+  .word _EPIPHANY_Exception_default /* Timer 0 */
+  .word _EPIPHANY_Exception_default /* Timer 1 */
+  .word _EPIPHANY_Exception_default /* Message int */
+  .word _EPIPHANY_Exception_default /* DMA0 int */
+  .word _EPIPHANY_Exception_default /* DMA1 int */
+  .word _EPIPHANY_Exception_default /* WAND */
+  .word _EPIPHANY_Exception_default /* User interrupt */
+
+_bsp_start_vector_table_end:
+
+.size  _start, .-_start
+
+.section .start,"ax"
+.align  4
+.type   _external_start, %function
+.normal_start:
+  /* Initialize the stack and frame pointers */
+  mov  sp, %low(bsp_section_stack_begin)
+  movt sp, %high(bsp_section_stack_begin)
+  mov  fp, sp
+
+cpu0:
+  /* Zero .bss section */
+  mov  r0, %low(bsp_section_bss_begin)
+  movt r0, %high(bsp_section_bss_begin)
+  mov  r1, sp
+  mov  r2,#0
+  mov  r3,#0
+
+_bss_clear_loop:
+  strd  r2, [r0], +#1
+  sub   r5, r1, r0
+  bne   _bss_clear_loop
+
+  /* Clear the reset interrupt flag */
+  mov   r0, %low(_jump_to_c)
+  movt  r0, %high(_jump_to_c)
+  movts iret, r0
+  rti
+
+_jump_to_c:
+  /* Jump to bootcard */
+  mov  r3, %low(boot_card)
+  movt r3, %high(boot_card)
+  jalr r3
+
+ /* Should never reach here */
+ idle
+
+.size  .normal_start, .-.normal_start
+
+.balign 4
+.type   .sw_exception, %function
+.sw_exception:
+  idle
+
+.balign 4
+.type   .clock_isr, %function
+.clock_isr:
+  /*
+   * r62 and r63 are saved here, and restored from _ISR_Handler, they
+   * and hold vector number and _ISR_Handler address repsectively.
+   */
+  add  sp, sp, #-8
+  str  r62, [sp, #0]
+  str  r63, [sp, #4]
+  mov  r62, 3
+  mov  r63, %low(_ISR_Handler)
+  movt r63, %high(_ISR_Handler)
+  jr   r6
+
+.balign 4
+.type   .timer1_isr, %function
+.timer1_isr:
+  /*
+   * r62 and r63 are saved here, and restored from _ISR_Handler, they
+   * and hold vector number and _ISR_Handler address repsectively.
+   */
+  add  sp, sp, #-8
+  str  r62, [sp, 0]
+  str  r63, [sp, 4]
+  mov  r62, 4
+  mov  r63, %low(_ISR_Handler)
+  movt r63, %high(_ISR_Handler)
+  jr   r63
+
+.balign 4
+TYPE_FUNC(_EPIPHANY_Exception_default)
+SYM(_EPIPHANY_Exception_default):
+  idle