void up_irqinitialize(void)
{
uint32_t regaddr;
#ifdef CONFIG_DEBUG_FEATURES
uint32_t regval;
#endif
int num_priority_registers;
int i;
/* Disable all interrupts */
for (i = 0; i < LPC43M4_IRQ_NEXTINT; i += 32)
{
putreg32(0xffffffff, NVIC_IRQ_CLEAR(i));
}
/* Make sure that we are using the correct vector table. The default
* vector address is 0x0000:0000 but if we are executing code that is
* positioned in SRAM or in external FLASH, then we may need to reset
* the interrupt vector so that it refers to the table in SRAM or in
* external FLASH.
*/
putreg32((uint32_t)_vectors, NVIC_VECTAB);
#ifdef CONFIG_ARCH_RAMVECTORS
/* If CONFIG_ARCH_RAMVECTORS is defined, then we are using a RAM-based
* vector table that requires special initialization.
*/
up_ramvec_initialize();
#endif
/* Set all interrupts (and exceptions) to the default priority */
putreg32(DEFPRIORITY32, NVIC_SYSH4_7_PRIORITY);
putreg32(DEFPRIORITY32, NVIC_SYSH8_11_PRIORITY);
putreg32(DEFPRIORITY32, NVIC_SYSH12_15_PRIORITY);
/* The NVIC ICTR register (bits 0-4) holds the number of of interrupt
* lines that the NVIC supports:
*
* 0 -> 32 interrupt lines, 8 priority registers
* 1 -> 64 " " " ", 16 priority registers
* 2 -> 96 " " " ", 32 priority registers
* ...
*/
num_priority_registers = (getreg32(NVIC_ICTR) + 1) * 8;
/* Now set all of the interrupt lines to the default priority */
regaddr = NVIC_IRQ0_3_PRIORITY;
while (num_priority_registers--)
{
putreg32(DEFPRIORITY32, regaddr);
regaddr += 4;
}
/* currents_regs is non-NULL only while processing an interrupt */
CURRENT_REGS = NULL;
/* Attach the SVCall and Hard Fault exception handlers. The SVCall
* exception is used for performing context switches; The Hard Fault
* must also be caught because a SVCall may show up as a Hard Fault
* under certain conditions.
*/
irq_attach(LPC43_IRQ_SVCALL, up_svcall, NULL);
irq_attach(LPC43_IRQ_HARDFAULT, up_hardfault, NULL);
/* Set the priority of the SVCall interrupt */
#ifdef CONFIG_ARCH_IRQPRIO
/* up_prioritize_irq(LPC43_IRQ_PENDSV, NVIC_SYSH_PRIORITY_MIN); */
#endif
#ifdef CONFIG_ARMV7M_USEBASEPRI
lpc43_prioritize_syscall(NVIC_SYSH_SVCALL_PRIORITY);
#endif
/* If the MPU is enabled, then attach and enable the Memory Management
* Fault handler.
*/
#ifdef CONFIG_ARM_MPU
irq_attach(LPC43_IRQ_MEMFAULT, up_memfault, NULL);
up_enable_irq(LPC43_IRQ_MEMFAULT);
#endif
/* Attach all other processor exceptions (except reset and sys tick) */
#ifdef CONFIG_DEBUG_FEATURES
irq_attach(LPC43_IRQ_NMI, lpc43_nmi, NULL);
#ifndef CONFIG_ARM_MPU
irq_attach(LPC43_IRQ_MEMFAULT, up_memfault, NULL);
#endif
irq_attach(LPC43_IRQ_BUSFAULT, lpc43_busfault, NULL);
irq_attach(LPC43_IRQ_USAGEFAULT, lpc43_usagefault, NULL);
irq_attach(LPC43_IRQ_PENDSV, lpc43_pendsv, NULL);
irq_attach(LPC43_IRQ_DBGMONITOR, lpc43_dbgmonitor, NULL);
irq_attach(LPC43_IRQ_RESERVED, lpc43_reserved, NULL);
#endif
lpc43_dumpnvic("initial", LPC43M4_IRQ_NIRQS);
/* If a debugger is connected, try to prevent it from catching hardfaults.
* If CONFIG_ARMV7M_USEBASEPRI, no hardfaults are expected in normal
* operation.
*/
#if defined(CONFIG_DEBUG_FEATURES) && !defined(CONFIG_ARMV7M_USEBASEPRI)
regval = getreg32(NVIC_DEMCR);
regval &= ~NVIC_DEMCR_VCHARDERR;
putreg32(regval, NVIC_DEMCR);
#endif
/* And finally, enable interrupts */
#ifndef CONFIG_SUPPRESS_INTERRUPTS
up_irq_enable();
#endif
}
void up_irqinitialize(void)
{
uint32_t regaddr;
int num_priority_registers;
int i;
/* Disable all interrupts */
for (i = 0; i < NR_VECTORS - EFM32_IRQ_INTERRUPTS; i += 32)
{
putreg32(0xffffffff, NVIC_IRQ_CLEAR(i));
}
#if defined(CONFIG_STACK_COLORATION) && CONFIG_ARCH_INTERRUPTSTACK > 3
/* Colorize the interrupt stack for debug purposes */
{
size_t intstack_size = (CONFIG_ARCH_INTERRUPTSTACK & ~3);
up_stack_color((FAR void *)((uintptr_t)&g_intstackbase - intstack_size),
intstack_size);
}
#endif
/* Make sure that we are using the correct vector table. The default
* vector address is 0x0000:0000 but if we are executing code that is
* positioned in SRAM or in external FLASH, then we may need to reset
* the interrupt vector so that it refers to the table in SRAM or in
* external FLASH.
*/
putreg32((uint32_t)_vectors, NVIC_VECTAB);
#ifdef CONFIG_ARCH_RAMVECTORS
/* If CONFIG_ARCH_RAMVECTORS is defined, then we are using a RAM-based
* vector table that requires special initialization.
*/
up_ramvec_initialize();
#endif
/* Set all interrupts (and exceptions) to the default priority */
putreg32(DEFPRIORITY32, NVIC_SYSH4_7_PRIORITY);
putreg32(DEFPRIORITY32, NVIC_SYSH8_11_PRIORITY);
putreg32(DEFPRIORITY32, NVIC_SYSH12_15_PRIORITY);
/* The NVIC ICTR register (bits 0-4) holds the number of of interrupt
* lines that the NVIC supports:
*
* 0 -> 32 interrupt lines, 8 priority registers
* 1 -> 64 " " " ", 16 priority registers
* 2 -> 96 " " " ", 32 priority registers
* ...
*/
num_priority_registers = (getreg32(NVIC_ICTR) + 1) * 8;
/* Now set all of the interrupt lines to the default priority */
regaddr = NVIC_IRQ0_3_PRIORITY;
while (num_priority_registers--)
{
putreg32(DEFPRIORITY32, regaddr);
regaddr += 4;
}
/* currents_regs is non-NULL only while processing an interrupt */
CURRENT_REGS = NULL;
/* Attach the SVCall and Hard Fault exception handlers. The SVCall
* exception is used for performing context switches; The Hard Fault
* must also be caught because a SVCall may show up as a Hard Fault
* under certain conditions.
*/
irq_attach(EFM32_IRQ_SVCALL, up_svcall);
irq_attach(EFM32_IRQ_HARDFAULT, up_hardfault);
/* Set the priority of the SVCall interrupt */
#ifdef CONFIG_ARMV7M_USEBASEPRI
efm32_prioritize_syscall(NVIC_SYSH_SVCALL_PRIORITY);
#endif
/* If the MPU is enabled, then attach and enable the Memory Management
* Fault handler.
*/
#ifdef CONFIG_ARM_MPU
irq_attach(EFM32_IRQ_MEMFAULT, up_memfault);
up_enable_irq(EFM32_IRQ_MEMFAULT);
#endif
/* Attach all other processor exceptions (except reset and sys tick) */
#ifdef CONFIG_DEBUG_FEATURES
irq_attach(EFM32_IRQ_NMI, efm32_nmi);
#ifndef CONFIG_ARM_MPU
irq_attach(EFM32_IRQ_MEMFAULT, up_memfault);
#endif
irq_attach(EFM32_IRQ_BUSFAULT, efm32_busfault);
irq_attach(EFM32_IRQ_USAGEFAULT, efm32_usagefault);
irq_attach(EFM32_IRQ_PENDSV, efm32_pendsv);
irq_attach(EFM32_IRQ_DBGMONITOR, efm32_dbgmonitor);
irq_attach(EFM32_IRQ_RESERVED, efm32_reserved);
#endif
efm32_dumpnvic("initial", NR_VECTORS);
#ifndef CONFIG_SUPPRESS_INTERRUPTS
#ifdef CONFIG_EFM32_GPIO_IRQ
/* Initialize logic to support a second level of interrupt decoding for
* GPIO pins.
*/
efm32_gpioirqinitialize();
#endif
/* And finally, enable interrupts */
up_irq_enable();
#endif
}
