powerpc/t32mppc: New BSP

1 files changed, 176 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/powerpc/t32mppc/start/start.S b/c/src/lib/libbsp/powerpc/t32mppc/start/start.S
new file mode 100644
index 0000000000..466e42f3b4
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/t32mppc/start/start.S
@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2012 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  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 <bspopts.h>
+
+#include <libcpu/powerpc-utility.h>
+
+#include <bsp/vectors.h>
+
+	.globl _start
+	.globl bsp_exc_vector_base
+
+	.section ".bsp_start_text", "ax"
+
+_start:
+	/* Enable time base */
+	li	r0, 0x4000
+	mtspr	HID0, r0
+
+	/* Initialize start stack */
+	LWI	r1, start_stack_end
+	subi	r1, r1, 16
+	li	r0, 0
+	stw	r0, 0(r1)
+
+	/* Copy fast text */
+	LWI	r3, bsp_section_fast_text_begin
+	LWI	r4, bsp_section_fast_text_load_begin
+	LWI	r5, bsp_section_fast_text_size
+	bl	copy
+
+	/* Copy read-only data */
+	LWI	r3, bsp_section_rodata_begin
+	LWI	r4, bsp_section_rodata_load_begin
+	LWI	r5, bsp_section_rodata_size
+	bl	copy
+
+	/* Copy fast data */
+	LWI	r3, bsp_section_fast_data_begin
+	LWI	r4, bsp_section_fast_data_load_begin
+	LWI	r5, bsp_section_fast_data_size
+	bl	copy
+
+	/* Copy data */
+	LWI	r3, bsp_section_data_begin
+	LWI	r4, bsp_section_data_load_begin
+	LWI	r5, bsp_section_data_size
+	bl	copy
+
+	/* Clear SBSS */
+	LWI	r3, bsp_section_sbss_begin
+	LWI	r4, bsp_section_sbss_size
+	bl	bsp_start_zero
+
+	/* Clear BSS */
+	LWI	r3, bsp_section_bss_begin
+	LWI	r4, bsp_section_bss_size
+	bl	bsp_start_zero
+
+	/* Set up EABI and SYSV environment */
+	bl	__eabi
+
+	/* Clear command line */
+	li	r3, 0
+
+	bl	boot_card
+
+twiddle:
+	b	twiddle
+
+copy:
+	cmpw	r3, r4
+	beqlr
+	b	memcpy
+
+	/* Exception vector prologues area */
+	.section ".bsp_start_text", "ax"
+	.align 4
+bsp_exc_vector_base:
+	stw	r1, ppc_exc_lock_crit@sdarel(r13)
+	stw	r4, ppc_exc_vector_register_crit@sdarel(r13)
+	li	r4, -32767
+	b	ppc_exc_wrap_bookE_crit
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 2
+	b	ppc_exc_wrap_nopush_e500_mchk
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 3
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 4
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -PPC_EXC_MINIMAL_FRAME_SIZE(r1)
+	stw	r4, PPC_EXC_VECTOR_PROLOGUE_OFFSET(r1)
+	li	r4, -32763
+	b	ppc_exc_wrap_async_normal
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 6
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 7
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 8
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 12
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 24
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -PPC_EXC_MINIMAL_FRAME_SIZE(r1)
+	stw	r4, PPC_EXC_VECTOR_PROLOGUE_OFFSET(r1)
+	li	r4, -32752
+	b	ppc_exc_wrap_async_normal
+	stwu	r1, -PPC_EXC_MINIMAL_FRAME_SIZE(r1)
+	stw	r4, PPC_EXC_VECTOR_PROLOGUE_OFFSET(r1)
+	li	r4, -32749
+	b	ppc_exc_wrap_async_normal
+	stw	r1, ppc_exc_lock_crit@sdarel(r13)
+	stw	r4, ppc_exc_vector_register_crit@sdarel(r13)
+	li	r4, -32748
+	b	ppc_exc_wrap_bookE_crit
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 18
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 17
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 13
+	b	ppc_exc_wrap_nopush_bookE_crit
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 10
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 25
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 26
+	b	ppc_exc_wrap_nopush_std
+	stwu	r1, -EXC_GENERIC_SIZE(r1)
+	stw	r4, GPR4_OFFSET(r1)
+	li	r4, 15
+	b	ppc_exc_wrap_nopush_std
+
+	/* Start stack area */
+	.section ".bsp_rwextra", "aw", @nobits
+	.align 4
+	.space 4096
+start_stack_end: