[6d85e05] | 1 | /* |
---|
| 2 | * Copyright (c) 2015 University of York. |
---|
| 3 | * Hesham Almatary <hesham@alumni.york.ac.uk> |
---|
| 4 | * |
---|
| 5 | * Copyright (c) 2013, The Regents of the University of California (Regents). |
---|
| 6 | * All Rights Reserved. |
---|
| 7 | * |
---|
| 8 | * Redistribution and use in source and binary forms, with or without |
---|
| 9 | * modification, are permitted provided that the following conditions |
---|
| 10 | * are met: |
---|
| 11 | * 1. Redistributions of source code must retain the above copyright |
---|
| 12 | * notice, this list of conditions and the following disclaimer. |
---|
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
---|
| 14 | * notice, this list of conditions and the following disclaimer in the |
---|
| 15 | * documentation and/or other materials provided with the distribution. |
---|
| 16 | * |
---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
---|
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
---|
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
---|
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
---|
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
---|
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
---|
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
---|
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
---|
| 27 | * SUCH DAMAGE. |
---|
| 28 | */ |
---|
[52f4fb6] | 29 | |
---|
[6d85e05] | 30 | #include <bsp/linker-symbols.h> |
---|
| 31 | #include <rtems/score/riscv-utility.h> |
---|
[8fa827c] | 32 | #include <rtems/score/cpu.h> |
---|
[6d85e05] | 33 | #include <rtems/asm.h> |
---|
| 34 | |
---|
| 35 | EXTERN(bsp_section_bss_begin) |
---|
| 36 | EXTERN(bsp_section_bss_end) |
---|
| 37 | EXTERN(ISR_Handler) |
---|
| 38 | EXTERN(bsp_section_stack_begin) |
---|
| 39 | |
---|
| 40 | PUBLIC(bsp_start_vector_table_begin) |
---|
| 41 | PUBLIC(bsp_start_vector_table_end) |
---|
| 42 | PUBLIC(_start) |
---|
| 43 | |
---|
[52f4fb6] | 44 | .section .bsp_start_text, "ax", @progbits |
---|
| 45 | .align 2 |
---|
| 46 | |
---|
[6d85e05] | 47 | TYPE_FUNC(_start) |
---|
| 48 | SYM(_start): |
---|
[9b2ef07f] | 49 | /* Load global pointer */ |
---|
| 50 | .option push |
---|
| 51 | .option norelax |
---|
| 52 | la gp, __global_pointer$ |
---|
| 53 | .option pop |
---|
| 54 | |
---|
[2086948a] | 55 | #ifdef RTEMS_SMP |
---|
| 56 | csrr s0, mhartid |
---|
| 57 | bnez s0, .Lloop_forever |
---|
| 58 | #endif |
---|
| 59 | |
---|
[52f4fb6] | 60 | la t0, ISR_Handler |
---|
| 61 | csrw mtvec, t0 |
---|
[6d85e05] | 62 | |
---|
[52f4fb6] | 63 | /* load stack and frame pointers */ |
---|
| 64 | la sp, _Configuration_Interrupt_stack_area_end |
---|
[6d85e05] | 65 | |
---|
[b0ee789] | 66 | /* Clear .bss */ |
---|
| 67 | la a0, bsp_section_bss_begin |
---|
| 68 | li a1, 0 |
---|
| 69 | la a2, bsp_section_bss_size |
---|
| 70 | call memset |
---|
[6d85e05] | 71 | |
---|
[52f4fb6] | 72 | /* Init FPU unit if it's there */ |
---|
| 73 | li t0, MSTATUS_FS |
---|
| 74 | csrs mstatus, t0 |
---|
[6d85e05] | 75 | |
---|
[52f4fb6] | 76 | j boot_card |
---|
[6d85e05] | 77 | |
---|
[2086948a] | 78 | #ifdef RTEMS_SMP |
---|
| 79 | .Lloop_forever: |
---|
| 80 | j .Lloop_forever |
---|
| 81 | #endif |
---|
| 82 | |
---|
[52f4fb6] | 83 | .align 4 |
---|
[6d85e05] | 84 | bsp_start_vector_table_begin: |
---|
[52f4fb6] | 85 | .word _RISCV_Exception_default /* User int */ |
---|
| 86 | .word _RISCV_Exception_default /* Supervisor int */ |
---|
| 87 | .word _RISCV_Exception_default /* Reserved */ |
---|
| 88 | .word _RISCV_Exception_default /* Machine int */ |
---|
| 89 | .word _RISCV_Exception_default /* User timer int */ |
---|
| 90 | .word _RISCV_Exception_default /* Supervisor Timer int */ |
---|
| 91 | .word _RISCV_Exception_default /* Reserved */ |
---|
| 92 | .word _RISCV_Exception_default /* Machine Timer int */ |
---|
| 93 | .word _RISCV_Exception_default /* User external int */ |
---|
| 94 | .word _RISCV_Exception_default /* Supervisor external int */ |
---|
| 95 | .word _RISCV_Exception_default /* Reserved */ |
---|
| 96 | .word _RISCV_Exception_default /* Machine external int */ |
---|
| 97 | .word _RISCV_Exception_default |
---|
| 98 | .word _RISCV_Exception_default |
---|
| 99 | .word _RISCV_Exception_default |
---|
| 100 | .word _RISCV_Exception_default |
---|
[6d85e05] | 101 | bsp_start_vector_table_end: |
---|