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