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Diffstat (limited to 'bsps/powerpc/virtex/start/start.S')
| -rw-r--r-- | bsps/powerpc/virtex/start/start.S | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/bsps/powerpc/virtex/start/start.S b/bsps/powerpc/virtex/start/start.S new file mode 100644 index 0000000000..725b09954f --- /dev/null +++ b/bsps/powerpc/virtex/start/start.S @@ -0,0 +1,116 @@ +/* + * Copyright (c) 2010-2013 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 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.org/license/LICENSE. + */ + +#include <rtems/asm.h> + +#include <bspopts.h> + +#include <libcpu/powerpc-utility.h> + + .globl _start + .globl virtex_exc_vector_base + + .section ".bsp_start_text", "ax" + +virtex_exc_vector_base: + + b _start + + /* Critical Input 0x0100 */ + /* Machine Check 0x0200 */ + /* Data Storage 0x0300 */ + /* Instruction Storage 0x0400 */ + /* External 0x0500 */ + /* Alignment 0x0600 */ + /* Program 0x0700 */ + /* FPU Unavailable 0x0800 */ + /* System Call 0x0C00 */ + /* APU Unavailable 0x0F20 */ + /* Programmable-Interval Timer 0x1000 */ + /* Fixed-Interval Timer 0x1010 */ + /* Watchdog Timer 0x1020 */ + /* Data TLB Miss 0x1100 */ + /* Instruction TLB Miss 0x1200 */ + /* Debug 0x2000 */ +.rept 0x2000 / 4 - 1 + b twiddle +.endr + + /* Start stack area */ +.rept BSP_START_STACK_SIZE / 4 + b twiddle +.endr + +_start: + + /* Reset time base */ + li r0, 0 + mtspr TBWU, r0 + mtspr TBWL, r0 + + /* Initialize start stack */ + LWI r1, _start + stwu r0, -4(r1) + stwu r0, -4(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 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 + + /* 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: + + bl bsp_reset + b twiddle + +copy: + + cmpw r3, r4 + beqlr + b memcpy + + /* Reset entry */ + .section ".virtex_reset", "ax" + +jump_to_start: + + LWI r3, _start + mtctr r3 + bctr + b jump_to_start |