69 lines
1.5 KiB
ArmAsm
69 lines
1.5 KiB
ArmAsm
/*
|
|
* Copyright (c) 2016 Jean-Paul Etienne <fractalclone@gmail.com>
|
|
* Contributors: 2018 Antmicro <www.antmicro.com>
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <toolchain.h>
|
|
|
|
/* exports */
|
|
GTEXT(__start)
|
|
|
|
/* imports */
|
|
GTEXT(__reset)
|
|
GTEXT(__irq_wrapper)
|
|
|
|
/*
|
|
* following pulpino datasheet, addr 0x00000000 - 0x00000058 are not used
|
|
* in IVT. Hence, set them to nop.
|
|
*
|
|
* Call __irq_wrapper to handle all interrupts/exceptions/faults/ECALL
|
|
*
|
|
* ECALL is used to handle context switching of threads, as well as
|
|
* IRQ offloading (when enabled).
|
|
*
|
|
* Interrupt Line 23: I2C IRQ 0x0000005C
|
|
* Interrupt Line 24: UART IRQ 0x00000060
|
|
* Interrupt Line 25: GPIO IRQ 0x00000064
|
|
* Interrupt Line 26: SPI Master 0 0x00000068
|
|
* Interrupt Line 27: SPI Master 1 0x0000006C
|
|
* Interrupt Line 28: Timer A Overflow 0x00000070
|
|
* Interrupt Line 29: Timer A Output Cmp 0x00000074
|
|
* Interrupt Line 30: Timer B Overflow 0x00000078
|
|
* Interrupt Line 31: Timer B Output Cmp 0x0000007C
|
|
*
|
|
* RESET 0x00000080 - call __reset
|
|
|
|
* Illegal Instruction Exception 0x00000084
|
|
* ECALL Instruction 0x00000088
|
|
* Invalid Memory Access 0x0000008C
|
|
*/
|
|
SECTION_FUNC(vectors, __start)
|
|
.option norvc;
|
|
|
|
/* nop addr 0x00000000 - 0x00000058 */
|
|
.org 0x00
|
|
.rept 23
|
|
nop
|
|
.endr
|
|
|
|
/* Call __irq_wrapper for all interrupts */
|
|
.org 0x5C
|
|
.rept 9
|
|
jal x0, __irq_wrapper
|
|
.endr
|
|
|
|
/* Call __reset for reset vector */
|
|
.org 0x80
|
|
jal x0, __reset
|
|
|
|
/* Illegal instruction */
|
|
jal x0, __irq_wrapper
|
|
|
|
/* ECALL (system call) */
|
|
jal x0, __irq_wrapper
|
|
|
|
/* Invalid memory access */
|
|
jal x0, __irq_wrapper
|