diff options
Diffstat (limited to 'arch/riscv32/soc/pulpino/vector.S')
| -rw-r--r-- | arch/riscv32/soc/pulpino/vector.S | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/riscv32/soc/pulpino/vector.S b/arch/riscv32/soc/pulpino/vector.S new file mode 100644 index 000000000..2de5ccb41 --- /dev/null +++ b/arch/riscv32/soc/pulpino/vector.S @@ -0,0 +1,76 @@ +/* + * Copyright (c) 2016 Jean-Paul Etienne <fractalclone@gmail.com> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define _ASMLANGUAGE + +#include <toolchain.h> + +/* 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, vinit) + .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 |