/************************************************************************************
* arch/arm/src/lm3s/lm3s_vectors.S
* arch/arm/src/chip/lm3s_vectors.S
*
* Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <arch/irq.h>
/************************************************************************************
* Preprocessor Definitions
************************************************************************************/
/* Memory Map:
*
* 0x0000:0000 - Beginning of FLASH. Address of vectors (if not using bootloader)
* 0x0002:0000 - Address of vectors if using bootloader
* 0x0003:ffff - End of flash
* 0x2000:0000 - Start of SRAM and start of .data (_sdata)
* - End of .data (_edata) abd start of .bss (_sbss)
* - End of .bss (_ebss) and bottom of idle stack
* - _ebss + CONFIG_IDLETHREAD_STACKSIZE = end of idle stack, start of heap
* 0x2000:ffff - End of SRAM and end of heap
*/
#define IDLE_STACK (_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
#define HEAP_BASE (_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
/* The Cortex-M3 return from interrupt is unusual. We provide the following special
* address to the BX instruction. The particular value also forces a return to
* thread mode and covers state from the main stack point, the MSP (vs. the MSP).
*/
#define EXC_RETURN 0xfffffff9
/************************************************************************************
* Global Symbols
************************************************************************************/
.globl __start
.syntax unified
.thumb
.file "lm3s_vectors.S"
/************************************************************************************
* Macros
************************************************************************************/
/* On entry into an IRQ, the hardware automatically saves the xPSR, PC, LR, R12, R0-R3
* registers on the stack, then branches to an instantantiation of the following
* macro. This macro simply loads the IRQ number into R0, then jumps to the common
* IRQ handling logic.
*/
.macro HANDLER, label, irqno
.thumb_func
\label:
mov r0, #\irqno
b lm3s_irqcommon
.endm
/************************************************************************************
* Vectors
************************************************************************************/
.section .vectors, "ax"
.code 16
.align 2
.globl lm3s_vectors
.type lm3s_vectors, function
lm3s_vectors:
/* Processor Exceptions */
.word IDLE_STACK /* Vector 0: Reset stack pointer */
.word __start /* Vector 1: Reset vector */
.word lm3s_nmi /* Vector 2: Non-Maskable Interrupt (NMI) */
.word lm3s_hardfault /* Vector 3: Hard fault */
.word lm3s_mpu /* Vector 4: Memory management (MPU) */
.word lm3s_busfault /* Vector 5: Bus fault */
.word lm3s_usagefault /* Vector 6: Usage fault */
.word lm3s_reserved /* Vector 7: Reserved */
.word lm3s_reserved /* Vector 8: Reserved */
.word lm3s_reserved /* Vector 9: Reserved */
.word lm3s_reserved /* Vector 10: Reserved */
.word lm3s_svcall /* Vector 11: SVC call */
.word lm3s_dbgmonitor /* Vector 12: Debug monitor */
.word lm3s_reserved /* Vector 13: Reserved */
.word lm3s_pendsv /* Vector 14: Pendable system service request */
.word lm3s_systick /* Vector 15: System tick */
/* External Interrupts */
#if defined(CONFIG_ARCH_CHIP_LM3S6918)
.word lm3s_gpioa /* Vector 16: GPIO Port A */
.word lm3s_gpiob /* Vector 17: GPIO Port B */
.word lm3s_gpioc /* Vector 18: GPIO Port C */
.word lm3s_gpiod /* Vector 19: GPIO Port D */
.word lm3s_gpioe /* Vector 20: GPIO Port E */
.word lm3s_uart0 /* Vector 21: UART 0 */
.word lm3s_uart1 /* Vector 22: UART 1 */
.word lm3s_ssi0 /* Vector 23: SSI 0 */
.word lm3s_i2c0 /* Vector 24: I2C 0 */
.word lm3s_reserved /* Vector 25: Reserved */
.word lm3s_reserved /* Vector 26: Reserved */
.word lm3s_reserved /* Vector 27: Reserved */
.word lm3s_reserved /* Vector 28: Reserved */
.word lm3s_reserved /* Vector 29: Reserved */
.word lm3s_adc0 /* Vector 30: ADC Sequence 0 */
.word lm3s_adc1 /* Vector 31: ADC Sequence 1 */
.word lm3s_adc2 /* Vector 32: ADC Sequence 2 */
.word lm3s_adc3 /* Vector 33: ADC Sequence 3 */
.word lm3s_wdog /* Vector 34: Watchdog Timer */
.word lm3s_tmr0a /* Vector 35: Timer 0 A */
.word lm3s_tmr0b /* Vector 36: Timer 0 B */
.word lm3s_tmr1a /* Vector 37: Timer 1 A */
.word lm3s_tmr1b /* Vector 38: Timer 1 B */
.word lm3s_tmr2a /* Vector 39: Timer 2 A */
.word lm3s_tmr2b /* Vector 40: Timer 3 B */
.word lm3s_cmp0 /* Vector 41: Analog Comparator 0 */
.word lm3s_cmp1 /* Vector 42: Analog Comparator 1 */
.word lm3s_reserved /* Vector 43: Reserved */
.word lm3s_syscon /* Vector 44: System Control */
.word lm3s_flashcon /* Vector 45: FLASH Control */
.word lm3s_gpiof /* Vector 46: GPIO Port F */
.word lm3s_gpiog /* Vector 47: GPIO Port G */
.word lm3s_gpioh /* Vector 48: GPIO Port H */
.word lm3s_reserved /* Vector 49: Reserved */
.word lm3s_ssi1 /* Vector 50: SSI 1 */
.word lm3s_tmr3a /* Vector 51: Timer 3 A */
.word lm3s_tmr3b /* Vector 52: Timer 3 B */
.word lm3s_i2c1 /* Vector 53: I2C 1 */
.word lm3s_reserved /* Vector 54: Reserved */
.word lm3s_reserved /* Vector 55: Reserved */
.word lm3s_reserved /* Vector 56: Reserved */
.word lm3s_reserved /* Vector 57: Reserved */
.word lm3s_eth /* Vector 58: Ethernet Controller */
.word lm3s_hib /* Vector 59: Hibernation Module */
.word lm3s_reserved /* Vector 60: Reserved */
.word lm3s_reserved /* Vector 61: Reserved */
.word lm3s_reserved /* Vector 62: Reserved */
.word lm3s_reserved /* Vector 63: Reserved */
.word lm3s_reserved /* Vector 64: Reserved */
.word lm3s_reserved /* Vector 65: Reserved */
.word lm3s_reserved /* Vector 66: Reserved */
.word lm3s_reserved /* Vector 67: Reserved */
.word lm3s_reserved /* Vector 68: Reserved */
.word lm3s_reserved /* Vector 69: Reserved */
.word lm3s_reserved /* Vector 70: Reserved */
#elif defined(CONFIG_ARCH_CHIP_LM3S6432)
.word lm3s_gpioa /* Vector 16: GPIO Port A */
.word lm3s_gpiob /* Vector 17: GPIO Port B */
.word lm3s_gpioc /* Vector 18: GPIO Port C */
.word lm3s_gpiod /* Vector 19: GPIO Port D */
.word lm3s_gpioe /* Vector 20: GPIO Port E */
.word lm3s_uart0 /* Vector 21: UART 0 */
.word lm3s_uart1 /* Vector 22: UART 1 */
.word lm3s_ssi0 /* Vector 23: SSI 0 */
.word lm3s_i2c0 /* Vector 24: I2C 0 */
.word lm3s_reserved /* Vector 25: Reserved */
.word lm3s_pwm0 /* Vector 26: PWM Generator 0 */
.word lm3s_reserved /* Vector 27: Reserved */
.word lm3s_reserved /* Vector 28: Reserved */
.word lm3s_reserved /* Vector 29: Reserved */
.word lm3s_adc0 /* Vector 30: ADC Sequence 0 */
.word lm3s_adc1 /* Vector 31: ADC Sequence 1 */
.word lm3s_adc2 /* Vector 32: ADC Sequence 2 */
.word lm3s_adc3 /* Vector 33: ADC Sequence 3 */
.word lm3s_wdog /* Vector 34: Watchdog Timer */
.word lm3s_tmr0a /* Vector 35: Timer 0 A */
.word lm3s_tmr0b /* Vector 36: Timer 0 B */
.word lm3s_tmr1a /* Vector 37: Timer 1 A */
.word lm3s_tmr1b /* Vector 38: Timer 1 B */
.word lm3s_tmr2a /* Vector 39: Timer 2 A */
.word lm3s_tmr2b /* Vector 40: Timer 3 B */
.word lm3s_cmp0 /* Vector 41: Analog Comparator 0 */
.word lm3s_cmp1 /* Vector 42: Analog Comparator 1 */
.word lm3s_reserved /* Vector 43: Reserved */
.word lm3s_syscon /* Vector 44: System Control */
.word lm3s_flashcon /* Vector 45: FLASH Control */
.word lm3s_gpiof /* Vector 46: GPIO Port F */
.word lm3s_gpiog /* Vector 47: GPIO Port G */
.word lm3s_reserved /* Vector 48: Reserved */
.word lm3s_reserved /* Vector 49: Reserved */
.word lm3s_reserved /* Vector 50: Reserved */
.word lm3s_reserved /* Vector 51: Reserved */
.word lm3s_reserved /* Vector 52: Reserved */
.word lm3s_reserved /* Vector 53: Reserved */
.word lm3s_reserved /* Vector 54: Reserved */
.word lm3s_reserved /* Vector 55: Reserved */
.word lm3s_reserved /* Vector 56: Reserved */
.word lm3s_reserved /* Vector 57: Reserved */
.word lm3s_eth /* Vector 58: Ethernet Controller */
.word lm3s_reserved /* Vector 59: Reserved */
.word lm3s_reserved /* Vector 60: Reserved */
.word lm3s_reserved /* Vector 61: Reserved */
.word lm3s_reserved /* Vector 62: Reserved */
.word lm3s_reserved /* Vector 63: Reserved */
.word lm3s_reserved /* Vector 64: Reserved */
.word lm3s_reserved /* Vector 65: Reserved */
.word lm3s_reserved /* Vector 66: Reserved */
.word lm3s_reserved /* Vector 67: Reserved */
.word lm3s_reserved /* Vector 68: Reserved */
.word lm3s_reserved /* Vector 69: Reserved */
.word lm3s_reserved /* Vector 70: Reserved */
#elif defined(CONFIG_ARCH_CHIP_LM3S6965)
.word lm3s_gpioa /* Vector 16: GPIO Port A */
.word lm3s_gpiob /* Vector 17: GPIO Port B */
.word lm3s_gpioc /* Vector 18: GPIO Port C */
.word lm3s_gpiod /* Vector 19: GPIO Port D */
.word lm3s_gpioe /* Vector 20: GPIO Port E */
.word lm3s_uart0 /* Vector 21: UART 0 */
.word lm3s_uart1 /* Vector 22: UART 1 */
.word lm3s_ssi0 /* Vector 23: SSI 0 */
.word lm3s_i2c0 /* Vector 24: I2C 0 */
.word lm3s_pwmfault /* Vector 25: PWM Fault */
.word lm3s_pwm0 /* Vector 26: PWM Generator 0 */
.word lm3s_pwm1 /* Vector 27: PWM Generator 1 */
.word lm3s_pwm2 /* Vector 28: PWM Generator 2 */
.word lm3s_qei0 /* Vector 29: QEI0 */
.word lm3s_adc0 /* Vector 30: ADC Sequence 0 */
.word lm3s_adc1 /* Vector 31: ADC Sequence 1 */
.word lm3s_adc2 /* Vector 32: ADC Sequence 2 */
.word lm3s_adc3 /* Vector 33: ADC Sequence 3 */
.word lm3s_wdog /* Vector 34: Watchdog Timer */
.word lm3s_tmr0a /* Vector 35: Timer 0 A */
.word lm3s_tmr0b /* Vector 36: Timer 0 B */
.word lm3s_tmr1a /* Vector 37: Timer 1 A */
.word lm3s_tmr1b /* Vector 38: Timer 1 B */
.word lm3s_tmr2a /* Vector 39: Timer 2 A */
.word lm3s_tmr2b /* Vector 40: Timer 3 B */
.word lm3s_cmp0 /* Vector 41: Analog Comparator 0 */
.word lm3s_cmp1 /* Vector 42: Analog Comparator 1 */
.word lm3s_reserved /* Vector 43: Reserved */
.word lm3s_syscon /* Vector 44: System Control */
.word lm3s_flashcon /* Vector 45: FLASH Control */
.word lm3s_gpiof /* Vector 46: GPIO Port F */
.word lm3s_gpiog /* Vector 47: GPIO Port G */
.word lm3s_reserved /* Vector 48: Reserved */
.word lm3s_uart2 /* Vector 49: UART 2 */
.word lm3s_reserved /* Vector 50: Reserved */
.word lm3s_tmr3a /* Vector 51: Timer 3 A */
.word lm3s_tmr3b /* Vector 52: Timer 3 B */
.word lm3s_i2c1 /* Vector 53: I2C 1 */
.word lm3s_qei1 /* Vector 54: QEI1 */
.word lm3s_reserved /* Vector 55: Reserved */
.word lm3s_reserved /* Vector 56: Reserved */
.word lm3s_reserved /* Vector 57: Reserved */
.word lm3s_eth /* Vector 58: Ethernet Controller */
.word lm3s_hib /* Vector 59: Hibernation Module */
.word lm3s_reserved /* Vector 60: Reserved */
.word lm3s_reserved /* Vector 61: Reserved */
.word lm3s_reserved /* Vector 62: Reserved */
.word lm3s_reserved /* Vector 63: Reserved */
.word lm3s_reserved /* Vector 64: Reserved */
.word lm3s_reserved /* Vector 65: Reserved */
.word lm3s_reserved /* Vector 66: Reserved */
.word lm3s_reserved /* Vector 67: Reserved */
.word lm3s_reserved /* Vector 68: Reserved */
.word lm3s_reserved /* Vector 69: Reserved */
.word lm3s_reserved /* Vector 70: Reserved */
#elif defined(CONFIG_ARCH_CHIP_LM3S9B96)
.word lm3s_gpioa /* Vector 16: GPIO Port A */
.word lm3s_gpiob /* Vector 17: GPIO Port B */
.word lm3s_gpioc /* Vector 18: GPIO Port C */
.word lm3s_gpiod /* Vector 19: GPIO Port D */
.word lm3s_gpioe /* Vector 20: GPIO Port E */
.word lm3s_uart0 /* Vector 21: UART 0 */
.word lm3s_uart1 /* Vector 22: UART 1 */
.word lm3s_ssi0 /* Vector 23: SSI 0 */
.word lm3s_i2c0 /* Vector 24: I2C 0 */
.word lm3s_pwmfault /* Vector 25: PWM Fault */
.word lm3s_pwm0 /* Vector 26: PWM Generator 0 */
.word lm3s_pwm1 /* Vector 27: PWM Generator 1 */
.word lm3s_pwm2 /* Vector 28: PWM Generator 2 */
.word lm3s_qei0 /* Vector 29: QEI0 */
.word lm3s_adc0 /* Vector 30: ADC Sequence 0 */
.word lm3s_adc1 /* Vector 31: ADC Sequence 1 */
.word lm3s_adc2 /* Vector 32: ADC Sequence 2 */
.word lm3s_adc3 /* Vector 33: ADC Sequence 3 */
.word lm3s_wdog /* Vector 34: Watchdog Timer */
.word lm3s_tmr0a /* Vector 35: Timer 0 A */
.word lm3s_tmr0b /* Vector 36: Timer 0 B */
.word lm3s_tmr1a /* Vector 37: Timer 1 A */
.word lm3s_tmr1b /* Vector 38: Timer 1 B */
.word lm3s_tmr2a /* Vector 39: Timer 2 A */
.word lm3s_tmr2b /* Vector 40: Timer 3 B */
.word lm3s_cmp0 /* Vector 41: Analog Comparator 0 */
.word lm3s_cmp1 /* Vector 42: Analog Comparator 1 */
.word lm3s_cmp2 /* Vector 43: Reserved */
.word lm3s_syscon /* Vector 44: System Control */
.word lm3s_flashcon /* Vector 45: FLASH Control */
.word lm3s_gpiof /* Vector 46: GPIO Port F */
.word lm3s_gpiog /* Vector 47: GPIO Port G */
.word lm3s_gpioh /* Vector 48: GPIO Port H */
.word lm3s_uart2 /* Vector 49: UART 2 */
.word lm3s_ssi1 /* Vector 50: SSI 1 */
.word lm3s_tmr3a /* Vector 51: Timer 3 A */
.word lm3s_tmr3b /* Vector 52: Timer 3 B */
.word lm3s_i2c1 /* Vector 53: I2C 1 */
.word lm3s_qei1 /* Vector 54: QEI1 */
.word lm3s_can0 /* Vector 55: CAN 0 */
.word lm3s_can1 /* Vector 56: CAN 1 */
.word lm3s_reserved /* Vector 57: Reserved */
.word lm3s_eth /* Vector 58: Ethernet Controller */
.word lm3s_reserved /* Vector 59: Reserved */
.word lm3s_usb /* Vector 60: USB */
.word lm3s_pwm3 /* Vector 61: PWM 3 */
.word lm3s_udmasoft /* Vector 62: uDMA Software */
.word lm3s_udmaerror /* Vector 63: uDMA Error */
.word lm3s_adc1_0 /* Vector 64: ADC1 Sequence 0 */
.word lm3s_adc1_1 /* Vector 65: ADC1 Sequence 1 */
.word lm3s_adc1_2 /* Vector 66: ADC1 Sequence 2 */
.word lm3s_adc1_3 /* Vector 67: ADC1 Sequence 3 */
.word lm3s_i2s0 /* Vector 68: I2S 0 */
.word lm3s_epi /* Vector 69: Reserved */
.word lm3s_gpioj /* Vector 70: GPIO J */
.word lm3s_reserved /* Vector 71: Reserved */
#elif defined(CONFIG_ARCH_CHIP_LM3S8962)
.word lm3s_gpioa /* Vector 16: GPIO Port A */
.word lm3s_gpiob /* Vector 17: GPIO Port B */
.word lm3s_gpioc /* Vector 18: GPIO Port C */
.word lm3s_gpiod /* Vector 19: GPIO Port D */
.word lm3s_gpioe /* Vector 20: GPIO Port E */
.word lm3s_uart0 /* Vector 21: UART 0 */
.word lm3s_uart1 /* Vector 22: UART 1 */
.word lm3s_ssi0 /* Vector 23: SSI 0 */
.word lm3s_i2c0 /* Vector 24: I2C 0 */
.word lm3s_pwmfault /* Vector 25: PWM Fault */
.word lm3s_pwm0 /* Vector 26: PWM Generator 0 */
.word lm3s_pwm1 /* Vector 27: PWM Generator 1 */
.word lm3s_pwm2 /* Vector 28: PWM Generator 2 */
.word lm3s_qei0 /* Vector 29: QEI0 */
.word lm3s_adc0 /* Vector 30: ADC Sequence 0 */
.word lm3s_adc1 /* Vector 31: ADC Sequence 1 */
.word lm3s_adc2 /* Vector 32: ADC Sequence 2 */
.word lm3s_adc3 /* Vector 33: ADC Sequence 3 */
.word lm3s_wdog /* Vector 34: Watchdog Timer */
.word lm3s_tmr0a /* Vector 35: Timer 0 A */
.word lm3s_tmr0b /* Vector 36: Timer 0 B */
.word lm3s_tmr1a /* Vector 37: Timer 1 A */
.word lm3s_tmr1b /* Vector 38: Timer 1 B */
.word lm3s_tmr2a /* Vector 39: Timer 2 A */
.word lm3s_tmr2b /* Vector 40: Timer 3 B */
.word lm3s_cmp0 /* Vector 41: Analog Comparator 0 */
.word lm3s_reserved /* Vector 42: Reserved */
.word lm3s_reserved /* Vector 43: Reserved */
.word lm3s_syscon /* Vector 44: System Control */
.word lm3s_flashcon /* Vector 45: FLASH Control */
.word lm3s_gpiof /* Vector 46: GPIO Port F */
.word lm3s_gpiog /* Vector 47: GPIO Port G */
.word lm3s_reserved /* Vector 48: Reserved */
.word lm3s_reserved /* Vector 49: Reserved */
.word lm3s_reserved /* Vector 50: Reserved */
.word lm3s_tmr3a /* Vector 51: Timer 3 A */
.word lm3s_tmr3b /* Vector 52: Timer 3 B */
.word lm3s_reserved /* Vector 53: Reserved*/
.word lm3s_qei1 /* Vector 54: QEI1 */
.word lm3s_can0 /* Vector 55: Can Controller */
.word lm3s_reserved /* Vector 56: Reserved */
.word lm3s_reserved /* Vector 57: Reserved */
.word lm3s_eth /* Vector 58: Ethernet Controller */
.word lm3s_hib /* Vector 59: Hibernation Module */
.word lm3s_reserved /* Vector 60: Reserved */
.word lm3s_reserved /* Vector 61: Reserved */
.word lm3s_reserved /* Vector 62: Reserved */
.word lm3s_reserved /* Vector 63: Reserved */
.word lm3s_reserved /* Vector 64: Reserved */
.word lm3s_reserved /* Vector 65: Reserved */
.word lm3s_reserved /* Vector 66: Reserved */
.word lm3s_reserved /* Vector 67: Reserved */
.word lm3s_reserved /* Vector 68: Reserved */
.word lm3s_reserved /* Vector 69: Reserved */
.word lm3s_reserved /* Vector 70: Reserved */
#else
# error "Vectors not specified for this LM3S chip"
#endif
.size lm3s_vectors, .-lm3s_vectors
/************************************************************************************
* .text
************************************************************************************/
.text
.type handlers, function
.thumb_func
handlers:
HANDLER lm3s_reserved, LM3S_IRQ_RESERVED /* Unexpected/reserved vector */
HANDLER lm3s_nmi, LM3S_IRQ_NMI /* Vector 2: Non-Maskable Interrupt (NMI) */
HANDLER lm3s_hardfault, LM3S_IRQ_HARDFAULT /* Vector 3: Hard fault */
HANDLER lm3s_mpu, LM3S_IRQ_MEMFAULT /* Vector 4: Memory management (MPU) */
HANDLER lm3s_busfault, LM3S_IRQ_BUSFAULT /* Vector 5: Bus fault */
HANDLER lm3s_usagefault, LM3S_IRQ_USAGEFAULT /* Vector 6: Usage fault */
HANDLER lm3s_svcall, LM3S_IRQ_SVCALL /* Vector 11: SVC call */
HANDLER lm3s_dbgmonitor, LM3S_IRQ_DBGMONITOR /* Vector 12: Debug Monitor */
HANDLER lm3s_pendsv, LM3S_IRQ_PENDSV /* Vector 14: Penable system service request */
HANDLER lm3s_systick, LM3S_IRQ_SYSTICK /* Vector 15: System tick */
#if defined(CONFIG_ARCH_CHIP_LM3S6918)
HANDLER lm3s_gpioa, LM3S_IRQ_GPIOA /* Vector 16: GPIO Port A */
HANDLER lm3s_gpiob, LM3S_IRQ_GPIOB /* Vector 17: GPIO Port B */
HANDLER lm3s_gpioc, LM3S_IRQ_GPIOC /* Vector 18: GPIO Port C */
HANDLER lm3s_gpiod, LM3S_IRQ_GPIOD /* Vector 19: GPIO Port D */
HANDLER lm3s_gpioe, LM3S_IRQ_GPIOE /* Vector 20: GPIO Port E */
HANDLER lm3s_uart0, LM3S_IRQ_UART0 /* Vector 21: UART 0 */
HANDLER lm3s_uart1, LM3S_IRQ_UART1 /* Vector 22: UART 1 */
HANDLER lm3s_ssi0, LM3S_IRQ_SSI0 /* Vector 23: SSI 0 */
HANDLER lm3s_i2c0, LM3S_IRQ_I2C0 /* Vector 24: I2C 0 */
HANDLER lm3s_adc0, LM3S_IRQ_ADC0 /* Vector 30: ADC Sequence 0 */
HANDLER lm3s_adc1, LM3S_IRQ_ADC1 /* Vector 31: ADC Sequence 1 */
HANDLER lm3s_adc2, LM3S_IRQ_ADC2 /* Vector 32: ADC Sequence 2 */
HANDLER lm3s_adc3, LM3S_IRQ_ADC3 /* Vector 33: ADC Sequence 3 */
HANDLER lm3s_wdog, LM3S_IRQ_WDOG /* Vector 34: Watchdog Timer */
HANDLER lm3s_tmr0a, LM3S_IRQ_TIMER0A /* Vector 35: Timer 0 A */
HANDLER lm3s_tmr0b, LM3S_IRQ_TIMER0B /* Vector 36: Timer 0 B */
HANDLER lm3s_tmr1a, LM3S_IRQ_TIMER1A /* Vector 37: Timer 1 A */
HANDLER lm3s_tmr1b, LM3S_IRQ_TIMER1B /* Vector 38: Timer 1 B */
HANDLER lm3s_tmr2a, LM3S_IRQ_TIMER2A /* Vector 39: Timer 2 A */
HANDLER lm3s_tmr2b, LM3S_IRQ_TIMER2B /* Vector 40: Timer 3 B */
HANDLER lm3s_cmp0, LM3S_IRQ_COMPARE0 /* Vector 41: Analog Comparator 0 */
HANDLER lm3s_cmp1, LM3S_IRQ_COMPARE1 /* Vector 42: Analog Comparator 1 */
HANDLER lm3s_syscon, LM3S_IRQ_SYSCON /* Vector 44: System Control */
HANDLER lm3s_flashcon, LM3S_IRQ_FLASHCON /* Vector 45: FLASH Control */
HANDLER lm3s_gpiof, LM3S_IRQ_GPIOF /* Vector 46: GPIO Port F */
HANDLER lm3s_gpiog, LM3S_IRQ_GPIOG /* Vector 47: GPIO Port G */
HANDLER lm3s_gpioh, LM3S_IRQ_GPIOH /* Vector 48: GPIO Port H */
HANDLER lm3s_ssi1, LM3S_IRQ_SSI1 /* Vector 50: SSI 1 */
HANDLER lm3s_tmr3a, LM3S_IRQ_TIMER3A /* Vector 51: Timer 3 A */
HANDLER lm3s_tmr3b, LM3S_IRQ_TIMER3B /* Vector 52: Timer 3 B */
HANDLER lm3s_i2c1, LM3S_IRQ_I2C1 /* Vector 53: I2C 1 */
HANDLER lm3s_eth, LM3S_IRQ_ETHCON /* Vector 58: Ethernet Controller */
HANDLER lm3s_hib, LM3S_IRQ_HIBERNATE /* Vector 59: Hibernation Module */
#elif defined(CONFIG_ARCH_CHIP_LM3S6432)
HANDLER lm3s_gpioa, LM3S_IRQ_GPIOA /* Vector 16: GPIO Port A */
HANDLER lm3s_gpiob, LM3S_IRQ_GPIOB /* Vector 17: GPIO Port B */
HANDLER lm3s_gpioc, LM3S_IRQ_GPIOC /* Vector 18: GPIO Port C */
HANDLER lm3s_gpiod, LM3S_IRQ_GPIOD /* Vector 19: GPIO Port D */
HANDLER lm3s_gpioe, LM3S_IRQ_GPIOE /* Vector 20: GPIO Port E */
HANDLER lm3s_uart0, LM3S_IRQ_UART0 /* Vector 21: UART 0 */
HANDLER lm3s_uart1, LM3S_IRQ_UART1 /* Vector 22: UART 1 */
HANDLER lm3s_ssi0, LM3S_IRQ_SSI0 /* Vector 23: SSI 0 */
HANDLER lm3s_i2c0, LM3S_IRQ_I2C0 /* Vector 24: I2C 0 */
HANDLER lm3s_pwm0, LM3S_IRQ_PWM0 /* Vector 26: PWM Generator 0 */
HANDLER lm3s_adc0, LM3S_IRQ_ADC0 /* Vector 30: ADC Sequence 0 */
HANDLER lm3s_adc1, LM3S_IRQ_ADC1 /* Vector 31: ADC Sequence 1 */
HANDLER lm3s_adc2, LM3S_IRQ_ADC2 /* Vector 32: ADC Sequence 2 */
HANDLER lm3s_adc3, LM3S_IRQ_ADC3 /* Vector 33: ADC Sequence 3 */
HANDLER lm3s_wdog, LM3S_IRQ_WDOG /* Vector 34: Watchdog Timer */
HANDLER lm3s_tmr0a, LM3S_IRQ_TIMER0A /* Vector 35: Timer 0 A */
HANDLER lm3s_tmr0b, LM3S_IRQ_TIMER0B /* Vector 36: Timer 0 B */
HANDLER lm3s_tmr1a, LM3S_IRQ_TIMER1A /* Vector 37: Timer 1 A */
HANDLER lm3s_tmr1b, LM3S_IRQ_TIMER1B /* Vector 38: Timer 1 B */
HANDLER lm3s_tmr2a, LM3S_IRQ_TIMER2A /* Vector 39: Timer 2 A */
HANDLER lm3s_tmr2b, LM3S_IRQ_TIMER2B /* Vector 40: Timer 3 B */
HANDLER lm3s_cmp0, LM3S_IRQ_COMPARE0 /* Vector 41: Analog Comparator 0 */
HANDLER lm3s_cmp1, LM3S_IRQ_COMPARE1 /* Vector 42: Analog Comparator 1 */
HANDLER lm3s_syscon, LM3S_IRQ_SYSCON /* Vector 44: System Control */
HANDLER lm3s_flashcon, LM3S_IRQ_FLASHCON /* Vector 45: FLASH Control */
HANDLER lm3s_gpiof, LM3S_IRQ_GPIOF /* Vector 46: GPIO Port F */
HANDLER lm3s_gpiog, LM3S_IRQ_GPIOG /* Vector 47: GPIO Port G */
HANDLER lm3s_eth, LM3S_IRQ_ETHCON /* Vector 58: Ethernet Controller */
#elif defined(CONFIG_ARCH_CHIP_LM3S6965)
HANDLER lm3s_gpioa, LM3S_IRQ_GPIOA /* Vector 16: GPIO Port A */
HANDLER lm3s_gpiob, LM3S_IRQ_GPIOB /* Vector 17: GPIO Port B */
HANDLER lm3s_gpioc, LM3S_IRQ_GPIOC /* Vector 18: GPIO Port C */
HANDLER lm3s_gpiod, LM3S_IRQ_GPIOD /* Vector 19: GPIO Port D */
HANDLER lm3s_gpioe, LM3S_IRQ_GPIOE /* Vector 20: GPIO Port E */
HANDLER lm3s_uart0, LM3S_IRQ_UART0 /* Vector 21: UART 0 */
HANDLER lm3s_uart1, LM3S_IRQ_UART1 /* Vector 22: UART 1 */
HANDLER lm3s_ssi0, LM3S_IRQ_SSI0 /* Vector 23: SSI 0 */
HANDLER lm3s_i2c0, LM3S_IRQ_I2C0 /* Vector 24: I2C 0 */
HANDLER lm3s_pwmfault, LM3S_IRQ_PWMFAULT /* Vector 25: PWM Fault */
HANDLER lm3s_pwm0, LM3S_IRQ_PWM0 /* Vector 26: PWM Generator 0 */
HANDLER lm3s_pwm1, LM3S_IRQ_PWM1 /* Vector 27: PWM Generator 1 */
HANDLER lm3s_pwm2, LM3S_IRQ_PWM2 /* Vector 28: PWM Generator 2 */
HANDLER lm3s_qei0, LM3S_IRQ_QEI0 /* Vector 29: QEI 0 */
HANDLER lm3s_adc0, LM3S_IRQ_ADC0 /* Vector 30: ADC Sequence 0 */
HANDLER lm3s_adc1, LM3S_IRQ_ADC1 /* Vector 31: ADC Sequence 1 */
HANDLER lm3s_adc2, LM3S_IRQ_ADC2 /* Vector 32: ADC Sequence 2 */
HANDLER lm3s_adc3, LM3S_IRQ_ADC3 /* Vector 33: ADC Sequence 3 */
HANDLER lm3s_wdog, LM3S_IRQ_WDOG /* Vector 34: Watchdog Timer */
HANDLER lm3s_tmr0a, LM3S_IRQ_TIMER0A /* Vector 35: Timer 0 A */
HANDLER lm3s_tmr0b, LM3S_IRQ_TIMER0B /* Vector 36: Timer 0 B */
HANDLER lm3s_tmr1a, LM3S_IRQ_TIMER1A /* Vector 37: Timer 1 A */
HANDLER lm3s_tmr1b, LM3S_IRQ_TIMER1B /* Vector 38: Timer 1 B */
HANDLER lm3s_tmr2a, LM3S_IRQ_TIMER2A /* Vector 39: Timer 2 A */
HANDLER lm3s_tmr2b, LM3S_IRQ_TIMER2B /* Vector 40: Timer 3 B */
HANDLER lm3s_cmp0, LM3S_IRQ_COMPARE0 /* Vector 41: Analog Comparator 0 */
HANDLER lm3s_cmp1, LM3S_IRQ_COMPARE1 /* Vector 42: Analog Comparator 1 */
HANDLER lm3s_syscon, LM3S_IRQ_SYSCON /* Vector 44: System Control */
HANDLER lm3s_flashcon, LM3S_IRQ_FLASHCON /* Vector 45: FLASH Control */
HANDLER lm3s_gpiof, LM3S_IRQ_GPIOF /* Vector 46: GPIO Port F */
HANDLER lm3s_gpiog, LM3S_IRQ_GPIOG /* Vector 47: GPIO Port G */
HANDLER lm3s_uart2, LM3S_IRQ_UART1 /* Vector 49: UART 1 */
HANDLER lm3s_tmr3a, LM3S_IRQ_TIMER3A /* Vector 51: Timer 3 A */
HANDLER lm3s_tmr3b, LM3S_IRQ_TIMER3B /* Vector 52: Timer 3 B */
HANDLER lm3s_i2c1, LM3S_IRQ_I2C1 /* Vector 53: I2C 1 */
HANDLER lm3s_qei1, LM3S_IRQ_QEI1 /* Vector 54: QEI 1 */
HANDLER lm3s_eth, LM3S_IRQ_ETHCON /* Vector 58: Ethernet Controller */
HANDLER lm3s_hib, LM3S_IRQ_HIBERNATE /* Vector 59: Hibernation Module */
#elif defined(CONFIG_ARCH_CHIP_LM3S8962)
HANDLER lm3s_gpioa, LM3S_IRQ_GPIOA /* Vector 16: GPIO Port A */
HANDLER lm3s_gpiob, LM3S_IRQ_GPIOB /* Vector 17: GPIO Port B */
HANDLER lm3s_gpioc, LM3S_IRQ_GPIOC /* Vector 18: GPIO Port C */
HANDLER lm3s_gpiod, LM3S_IRQ_GPIOD /* Vector 19: GPIO Port D */
HANDLER lm3s_gpioe, LM3S_IRQ_GPIOE /* Vector 20: GPIO Port E */
HANDLER lm3s_uart0, LM3S_IRQ_UART0 /* Vector 21: UART 0 */
HANDLER lm3s_uart1, LM3S_IRQ_UART1 /* Vector 22: UART 1 */
HANDLER lm3s_ssi0, LM3S_IRQ_SSI0 /* Vector 23: SSI 0 */
HANDLER lm3s_i2c0, LM3S_IRQ_I2C0 /* Vector 24: I2C 0 */
HANDLER lm3s_pwmfault, LM3S_IRQ_PWMFAULT /* Vector 25: PWM Fault */
HANDLER lm3s_pwm0, LM3S_IRQ_PWM0 /* Vector 26: PWM Generator 0 */
HANDLER lm3s_pwm1, LM3S_IRQ_PWM1 /* Vector 27: PWM Generator 1 */
HANDLER lm3s_pwm2, LM3S_IRQ_PWM2 /* Vector 28: PWM Generator 2 */
HANDLER lm3s_qei0, LM3S_IRQ_QEI0 /* Vector 29: QEI 0 */
HANDLER lm3s_adc0, LM3S_IRQ_ADC0 /* Vector 30: ADC Sequence 0 */
HANDLER lm3s_adc1, LM3S_IRQ_ADC1 /* Vector 31: ADC Sequence 1 */
HANDLER lm3s_adc2, LM3S_IRQ_ADC2 /* Vector 32: ADC Sequence 2 */
HANDLER lm3s_adc3, LM3S_IRQ_ADC3 /* Vector 33: ADC Sequence 3 */
HANDLER lm3s_wdog, LM3S_IRQ_WDOG /* Vector 34: Watchdog Timer */
HANDLER lm3s_tmr0a, LM3S_IRQ_TIMER0A /* Vector 35: Timer 0 A */
HANDLER lm3s_tmr0b, LM3S_IRQ_TIMER0B /* Vector 36: Timer 0 B */
HANDLER lm3s_tmr1a, LM3S_IRQ_TIMER1A /* Vector 37: Timer 1 A */
HANDLER lm3s_tmr1b, LM3S_IRQ_TIMER1B /* Vector 38: Timer 1 B */
HANDLER lm3s_tmr2a, LM3S_IRQ_TIMER2A /* Vector 39: Timer 2 A */
HANDLER lm3s_tmr2b, LM3S_IRQ_TIMER2B /* Vector 40: Timer 3 B */
HANDLER lm3s_cmp0, LM3S_IRQ_COMPARE0 /* Vector 41: Analog Comparator 0 */
HANDLER lm3s_syscon, LM3S_IRQ_SYSCON /* Vector 44: System Control */
HANDLER lm3s_flashcon, LM3S_IRQ_FLASHCON /* Vector 45: FLASH Control */
HANDLER lm3s_gpiof, LM3S_IRQ_GPIOF /* Vector 46: GPIO Port F */
HANDLER lm3s_gpiog, LM3S_IRQ_GPIOG /* Vector 47: GPIO Port G */
HANDLER lm3s_uart2, LM3S_IRQ_UART1 /* Vector 49: UART 1 */
HANDLER lm3s_tmr3a, LM3S_IRQ_TIMER3A /* Vector 51: Timer 3 A */
HANDLER lm3s_tmr3b, LM3S_IRQ_TIMER3B /* Vector 52: Timer 3 B */
HANDLER lm3s_i2c1, LM3S_IRQ_I2C1 /* Vector 53: I2C 1 */
HANDLER lm3s_qei1, LM3S_IRQ_QEI1 /* Vector 54: QEI 1 */
HANDLER lm3s_can0, LM3S_IRQ_CAN0 /* Vector 55: CAN 0 */
HANDLER lm3s_eth, LM3S_IRQ_ETHCON /* Vector 58: Ethernet Controller */
HANDLER lm3s_hib, LM3S_IRQ_HIBERNATE /* Vector 59: Hibernation Module */
#elif defined(CONFIG_ARCH_CHIP_LM3S9B96)
HANDLER lm3s_gpioa, LM3S_IRQ_GPIOA /* Vector 16: GPIO Port A */
HANDLER lm3s_gpiob, LM3S_IRQ_GPIOB /* Vector 17: GPIO Port B */
HANDLER lm3s_gpioc, LM3S_IRQ_GPIOC /* Vector 18: GPIO Port C */
HANDLER lm3s_gpiod, LM3S_IRQ_GPIOD /* Vector 19: GPIO Port D */
HANDLER lm3s_gpioe, LM3S_IRQ_GPIOE /* Vector 20: GPIO Port E */
HANDLER lm3s_uart0, LM3S_IRQ_UART0 /* Vector 21: UART 0 */
HANDLER lm3s_uart1, LM3S_IRQ_UART1 /* Vector 22: UART 1 */
HANDLER lm3s_ssi0, LM3S_IRQ_SSI0 /* Vector 23: SSI 0 */
HANDLER lm3s_i2c0, LM3S_IRQ_I2C0 /* Vector 24: I2C 0 */
HANDLER lm3s_pwmfault, LM3S_IRQ_PWMFAULT /* Vector 25: PWM Fault */
HANDLER lm3s_pwm0, LM3S_IRQ_PWM0 /* Vector 26: PWM Generator 0 */
HANDLER lm3s_pwm1, LM3S_IRQ_PWM1 /* Vector 27: PWM Generator 1 */
HANDLER lm3s_pwm2, LM3S_IRQ_PWM2 /* Vector 28: PWM Generator 2 */
HANDLER lm3s_qei0, LM3S_IRQ_QEI0 /* Vector 29: QEI 0 */
HANDLER lm3s_adc0, LM3S_IRQ_ADC0 /* Vector 30: ADC Sequence 0 */
HANDLER lm3s_adc1, LM3S_IRQ_ADC1 /* Vector 31: ADC Sequence 1 */
HANDLER lm3s_adc2, LM3S_IRQ_ADC2 /* Vector 32: ADC Sequence 2 */
HANDLER lm3s_adc3, LM3S_IRQ_ADC3 /* Vector 33: ADC Sequence 3 */
HANDLER lm3s_wdog, LM3S_IRQ_WDOG /* Vector 34: Watchdog Timer */
HANDLER lm3s_tmr0a, LM3S_IRQ_TIMER0A /* Vector 35: Timer 0 A */
HANDLER lm3s_tmr0b, LM3S_IRQ_TIMER0B /* Vector 36: Timer 0 B */
HANDLER lm3s_tmr1a, LM3S_IRQ_TIMER1A /* Vector 37: Timer 1 A */
HANDLER lm3s_tmr1b, LM3S_IRQ_TIMER1B /* Vector 38: Timer 1 B */
HANDLER lm3s_tmr2a, LM3S_IRQ_TIMER2A /* Vector 39: Timer 2 A */
HANDLER lm3s_tmr2b, LM3S_IRQ_TIMER2B /* Vector 40: Timer 3 B */
HANDLER lm3s_cmp0, LM3S_IRQ_COMPARE0 /* Vector 41: Analog Comparator 0 */
HANDLER lm3s_cmp1, LM3S_IRQ_COMPARE1 /* Vector 42: Analog Comparator 1 */
HANDLER lm3s_cmp2, LM3S_IRQ_COMPARE2 /* Vector 43: Analog Comparator 2 */
HANDLER lm3s_syscon, LM3S_IRQ_SYSCON /* Vector 44: System Control */
HANDLER lm3s_flashcon, LM3S_IRQ_FLASHCON /* Vector 45: FLASH Control */
HANDLER lm3s_gpiof, LM3S_IRQ_GPIOF /* Vector 46: GPIO Port F */
HANDLER lm3s_gpiog, LM3S_IRQ_GPIOG /* Vector 47: GPIO Port G */
HANDLER lm3s_gpioh, LM3S_IRQ_GPIOH /* Vector 48: GPIO Port H */
HANDLER lm3s_uart2, LM3S_IRQ_UART2 /* Vector 49: UART 2 */
HANDLER lm3s_ssi1, LM3S_IRQ_SSI1 /* Vector 50: GPIO Port H */
HANDLER lm3s_tmr3a, LM3S_IRQ_TIMER3A /* Vector 51: Timer 3 A */
HANDLER lm3s_tmr3b, LM3S_IRQ_TIMER3B /* Vector 52: Timer 3 B */
HANDLER lm3s_i2c1, LM3S_IRQ_I2C1 /* Vector 53: I2C 1 */
HANDLER lm3s_qei1, LM3S_IRQ_QEI1 /* Vector 54: QEI 1 */
HANDLER lm3s_can0, LM3S_IRQ_CAN0 /* Vector 55: CAN 0 */
HANDLER lm3s_can1, LM3S_IRQ_CAN1 /* Vector 56: CAN 1 */
HANDLER lm3s_eth, LM3S_IRQ_ETHCON /* Vector 58: Ethernet Controller */
HANDLER lm3s_usb, LM3S_IRQ_USB /* Vector 60: USB */
HANDLER lm3s_pwm3, LM3S_IRQ_PWM3 /* Vector 61: PWM 3 */
HANDLER lm3s_udmasoft, LM3S_IRQ_UDMASOFT /* Vector 62: uDMA Software */
HANDLER lm3s_udmaerror, LM3S_IRQ_UDMAERROR /* Vector 63: uDMA Error */
HANDLER lm3s_adc1_0, LM3S_IRQ_ADC1_0 /* Vector 64: ADC1 Sequence 0 */
HANDLER lm3s_adc1_1, LM3S_IRQ_ADC1_1 /* Vector 65: ADC1 Sequence 1 */
HANDLER lm3s_adc1_2, LM3S_IRQ_ADC1_2 /* Vector 66: ADC1 Sequence 2 */
HANDLER lm3s_adc1_3, LM3S_IRQ_ADC1_3 /* Vector 67: ADC1 Sequence 3 */
HANDLER lm3s_i2s0, LM3S_IRQ_I2S0 /* Vector 68: I2S 0 */
HANDLER lm3s_epi, LM3S_IRQ_EPI /* Vector 69: EPI */
HANDLER lm3s_gpioj, LM3S_IRQ_GPIOJ /* Vector 70: GPIO Port J */
#else
# error "Vectors not specified for this LM3S chip"
#endif
/* Common IRQ handling logic. On entry here, the return stack is on either
* the PSP or the MSP and looks like the following:
*
* REG_XPSR
* REG_R15
* REG_R14
* REG_R12
* REG_R3
* REG_R2
* REG_R1
* MSP->REG_R0
*
* And
* R0 contains the IRQ number
* R14 Contains the EXC_RETURN value
* We are in handler mode and the current SP is the MSP
*/
lm3s_irqcommon:
/* Complete the context save */
#ifdef CONFIG_NUTTX_KERNEL
/* The EXC_RETURN value will be 0xfffffff9 (privileged thread) or 0xfffffff1
* (handler mode) if the state is on the MSP. It can only be on the PSP if
* EXC_RETURN is 0xfffffffd (unprivileged thread)
*/
adds r2, r14, #3 /* If R14=0xfffffffd, then r2 == 0 */
ite ne /* Next two instructions are condition */
mrsne r1, msp /* R1=The main stack pointer */
mrseq r1, psp /* R1=The process stack pointer */
#else
mrs r1, msp /* R1=The main stack pointer */
#endif
mov r2, r1 /* R2=Copy of the main/process stack pointer */
add r2, #HW_XCPT_SIZE /* R2=MSP/PSP before the interrupt was taken */
mrs r3, primask /* R3=Current PRIMASK setting */
#ifdef CONFIG_NUTTX_KERNEL
stmdb r1!, {r2-r11,r14} /* Save the remaining registers plus the SP value */
#else
stmdb r1!, {r2-r11} /* Save the remaining registers plus the SP value */
#endif
/* Disable interrupts, select the stack to use for interrupt handling
* and call up_doirq to handle the interrupt
*/
cpsid i /* Disable further interrupts */
/* If CONFIG_ARCH_INTERRUPTSTACK is defined, we will use a special interrupt
* stack pointer. The way that this is done here prohibits nested interrupts!
* Otherwise, we will re-use the main stack for interrupt level processing.
*/
#if CONFIG_ARCH_INTERRUPTSTACK > 3
ldr sp, =g_intstackbase
str r1, [sp, #-4]! /* Save the MSP on the interrupt stack */
bl up_doirq /* R0=IRQ, R1=register save (msp) */
ldr r1, [sp, #+4]! /* Recover R1=main stack pointer */
#else
mov sp, r1 /* We are using the main stack pointer */
bl up_doirq /* R0=IRQ, R1=register save (msp) */
mov r1, sp /* Recover R1=main stack pointer */
#endif
/* On return from up_doirq, R0 will hold a pointer to register context
* array to use for the interrupt return. If that return value is the same
* as current stack pointer, then things are relatively easy.
*/
cmp r0, r1 /* Context switch? */
beq 1f /* Branch if no context switch */
/* We are returning with a pending context switch. This case is different
* because in this case, the register save structure does not lie on the
* stack but, rather, are within a TCB structure. We'll have to copy some
* values to the stack.
*/
add r1, r0, #SW_XCPT_SIZE /* R1=Address of HW save area in reg array */
ldmia r1, {r4-r11} /* Fetch eight registers in HW save area */
ldr r1, [r0, #(4*REG_SP)] /* R1=Value of SP before interrupt */
stmdb r1!, {r4-r11} /* Store eight registers in HW save area */
#ifdef CONFIG_NUTTX_KERNEL
ldmia r0, {r2-r11,r14} /* Recover R4-R11, r14 + 2 temp values */
#else
ldmia r0, {r2-r11} /* Recover R4-R11 + 2 temp values */
#endif
b 2f /* Re-join common logic */
/* We are returning with no context switch. We simply need to "unwind"
* the same stack frame that we created
*/
1:
#ifdef CONFIG_NUTTX_KERNEL
ldmia r1!, {r2-r11,r14} /* Recover R4-R11, r14 + 2 temp values */
#else
ldmia r1!, {r2-r11} /* Recover R4-R11 + 2 temp values */
#endif
2:
#ifdef CONFIG_NUTTX_KERNEL
/* The EXC_RETURN value will be 0xfffffff9 (privileged thread) or 0xfffffff1
* (handler mode) if the state is on the MSP. It can only be on the PSP if
* EXC_RETURN is 0xfffffffd (unprivileged thread)
*/
adds r0, r14, #3 /* If R14=0xfffffffd, then r0 == 0 */
ite ne /* Next two instructions are condition */
msrne msp, r1 /* R1=The main stack pointer */
msreq psp, r1 /* R1=The process stack pointer */
#else
msr msp, r1 /* Recover the return MSP value */
/* Preload r14 with the special return value first (so that the return
* actually occurs with interrupts still disabled).
*/
ldr r14, =EXC_RETURN /* Load the special value */
#endif
/* Restore the interrupt state */
msr primask, r3 /* Restore interrupts */
/* Always return with R14 containing the special value that will: (1)
* return to thread mode, and (2) continue to use the MSP
*/
bx r14 /* And return */
.size handlers, .-handlers
/************************************************************************************
* Name: up_interruptstack/g_intstackbase
*
* Description:
* Shouldn't happen
*
************************************************************************************/
#if CONFIG_ARCH_INTERRUPTSTACK > 3
.bss
.global g_intstackbase
.align 4
up_interruptstack:
.skip (CONFIG_ARCH_INTERRUPTSTACK & ~3)
g_intstackbase:
.size up_interruptstack, .-up_interruptstack
#endif
/************************************************************************************
* .rodata
************************************************************************************/
.section .rodata, "a"
/* Variables: _sbss is the start of the BSS region (see ld.script) _ebss is the end
* of the BSS regsion (see ld.script). The idle task stack starts at the end of BSS
* and is of size CONFIG_IDLETHREAD_STACKSIZE. The IDLE thread is the thread that
* the system boots on and, eventually, becomes the idle, do nothing task that runs
* only when there is nothing else to run. The heap continues from there until the
* end of memory. See g_heapbase below.
*/
.globl g_heapbase
.type g_heapbase, object
g_heapbase:
.long _ebss+CONFIG_IDLETHREAD_STACKSIZE
.size g_heapbase, .-g_heapbase
.end
