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rt-thread/bsp/dm365/platform/interrupt.c

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/*
* File : interrupt.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2010-11-13 weety first version
*/
#include <rtthread.h>
#include <rthw.h>
#include "dm36x.h"
#define MAX_HANDLERS 64
extern rt_uint32_t rt_interrupt_nest;
struct rt_irq_desc irq_desc[MAX_HANDLERS];
/* exception and interrupt handler table */
rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
rt_uint32_t rt_thread_switch_interrupt_flag;
#define IRQ_BIT(irq) ((irq) & 0x1f)
#define FIQ_REG0_OFFSET 0x0000
#define FIQ_REG1_OFFSET 0x0004
#define IRQ_REG0_OFFSET 0x0008
#define IRQ_REG1_OFFSET 0x000C
#define IRQ_ENT_REG0_OFFSET 0x0018
#define IRQ_ENT_REG1_OFFSET 0x001C
#define IRQ_INCTL_REG_OFFSET 0x0020
#define IRQ_EABASE_REG_OFFSET 0x0024
#define IRQ_INTPRI0_REG_OFFSET 0x0030
#define IRQ_INTPRI7_REG_OFFSET 0x004C
/* FIQ are pri 0-1; otherwise 2-7, with 7 lowest priority */
static const rt_uint8_t dm365_default_priorities[DAVINCI_N_AINTC_IRQ] = {
[IRQ_DM3XX_VPSSINT0] = 2,
[IRQ_DM3XX_VPSSINT1] = 6,
[IRQ_DM3XX_VPSSINT2] = 6,
[IRQ_DM3XX_VPSSINT3] = 6,
[IRQ_DM3XX_VPSSINT4] = 6,
[IRQ_DM3XX_VPSSINT5] = 6,
[IRQ_DM3XX_VPSSINT6] = 6,
[IRQ_DM3XX_VPSSINT7] = 7,
[IRQ_DM3XX_VPSSINT8] = 6,
[IRQ_ASQINT] = 6,
[IRQ_DM365_IMXINT0] = 6,
[IRQ_DM3XX_IMCOPINT] = 6,
[IRQ_USBINT] = 4,
[IRQ_DM3XX_RTOINT] = 4,
[IRQ_DM3XX_TINT5] = 7,
[IRQ_DM3XX_TINT6] = 7,
[IRQ_CCINT0] = 5, /* dma */
[IRQ_DM3XX_SPINT1_0] = 5, /* dma */
[IRQ_DM3XX_SPINT1_1] = 5, /* dma */
[IRQ_DM3XX_SPINT2_0] = 5, /* dma */
[IRQ_DM365_PSCINT] = 7,
[IRQ_DM3XX_SPINT2_1] = 7,
[IRQ_DM3XX_TINT7] = 4,
[IRQ_DM3XX_SDIOINT0] = 7,
[IRQ_DM365_MBXINT] = 7,
[IRQ_DM365_MBRINT] = 7,
[IRQ_DM3XX_MMCINT0] = 7,
[IRQ_DM3XX_MMCINT1] = 7,
[IRQ_DM3XX_PWMINT3] = 7,
[IRQ_DM365_DDRINT] = 7,
[IRQ_DM365_AEMIFINT] = 7,
[IRQ_DM3XX_SDIOINT1] = 4,
[IRQ_DM365_TINT0] = 2, /* clockevent */
[IRQ_DM365_TINT1] = 2, /* clocksource */
[IRQ_DM365_TINT2] = 7, /* DSP timer */
[IRQ_DM365_TINT3] = 7, /* system tick */
[IRQ_PWMINT0] = 7,
[IRQ_PWMINT1] = 7,
[IRQ_DM365_PWMINT2] = 7,
[IRQ_DM365_IICINT] = 3,
[IRQ_UARTINT0] = 3,
[IRQ_UARTINT1] = 3,
[IRQ_DM3XX_SPINT0_0] = 3,
[IRQ_DM3XX_SPINT0_1] = 3,
[IRQ_DM3XX_GPIO0] = 3,
[IRQ_DM3XX_GPIO1] = 7,
[IRQ_DM3XX_GPIO2] = 4,
[IRQ_DM3XX_GPIO3] = 4,
[IRQ_DM3XX_GPIO4] = 7,
[IRQ_DM3XX_GPIO5] = 7,
[IRQ_DM3XX_GPIO6] = 7,
[IRQ_DM3XX_GPIO7] = 7,
[IRQ_DM3XX_GPIO8] = 7,
[IRQ_DM3XX_GPIO9] = 7,
[IRQ_DM365_GPIO10] = 7,
[IRQ_DM365_GPIO11] = 7,
[IRQ_DM365_GPIO12] = 7,
[IRQ_DM365_GPIO13] = 7,
[IRQ_DM365_GPIO14] = 7,
[IRQ_DM365_GPIO15] = 7,
[IRQ_DM365_KEYINT] = 7,
[IRQ_DM365_COMMTX] = 7,
[IRQ_DM365_COMMRX] = 7,
[IRQ_EMUINT] = 7,
};
static inline unsigned int davinci_irq_readl(int offset)
{
return davinci_readl(DAVINCI_ARM_INTC_BASE + offset);
}
static inline void davinci_irq_writel(unsigned long value, int offset)
{
davinci_writel(value, DAVINCI_ARM_INTC_BASE + offset);
}
/**
* @addtogroup DM36X
*/
/*@{*/
rt_isr_handler_t rt_hw_interrupt_handle(int vector, void *param)
{
rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
return RT_NULL;
}
/**
* This function will initialize hardware interrupt
*/
void rt_hw_interrupt_init(void)
{
int i;
register rt_uint32_t idx;
const rt_uint8_t *priority;
priority = dm365_default_priorities;
/* Clear all interrupt requests */
davinci_irq_writel(~0x0, FIQ_REG0_OFFSET);
davinci_irq_writel(~0x0, FIQ_REG1_OFFSET);
davinci_irq_writel(~0x0, IRQ_REG0_OFFSET);
davinci_irq_writel(~0x0, IRQ_REG1_OFFSET);
/* Disable all interrupts */
davinci_irq_writel(0x0, IRQ_ENT_REG0_OFFSET);
davinci_irq_writel(0x0, IRQ_ENT_REG1_OFFSET);
/* Interrupts disabled immediately, IRQ entry reflects all */
davinci_irq_writel(0x0, IRQ_INCTL_REG_OFFSET);
/* we don't use the hardware vector table, just its entry addresses */
davinci_irq_writel(0, IRQ_EABASE_REG_OFFSET);
/* Clear all interrupt requests */
davinci_irq_writel(~0x0, FIQ_REG0_OFFSET);
davinci_irq_writel(~0x0, FIQ_REG1_OFFSET);
davinci_irq_writel(~0x0, IRQ_REG0_OFFSET);
davinci_irq_writel(~0x0, IRQ_REG1_OFFSET);
for (i = IRQ_INTPRI0_REG_OFFSET; i <= IRQ_INTPRI7_REG_OFFSET; i += 4) {
unsigned j;
rt_uint32_t pri;
for (j = 0, pri = 0; j < 32; j += 4, priority++)
pri |= (*priority & 0x07) << j;
davinci_irq_writel(pri, i);
}
/* init exceptions table */
for(idx=0; idx < MAX_HANDLERS; idx++)
{
irq_desc[idx].handler = (rt_isr_handler_t)rt_hw_interrupt_handle;
irq_desc[idx].param = RT_NULL;
#ifdef RT_USING_INTERRUPT_INFO
rt_snprintf(irq_desc[idx].name, RT_NAME_MAX - 1, "default");
irq_desc[idx].counter = 0;
#endif
}
/* init interrupt nest, and context in thread sp */
rt_interrupt_nest = 0;
rt_interrupt_from_thread = 0;
rt_interrupt_to_thread = 0;
rt_thread_switch_interrupt_flag = 0;
}
/**
* This function will mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_mask(int irq)
{
unsigned int mask;
rt_uint32_t l;
mask = 1 << IRQ_BIT(irq);
if (irq > 31) {
l = davinci_irq_readl(IRQ_ENT_REG1_OFFSET);
l &= ~mask;
davinci_irq_writel(l, IRQ_ENT_REG1_OFFSET);
} else {
l = davinci_irq_readl(IRQ_ENT_REG0_OFFSET);
l &= ~mask;
davinci_irq_writel(l, IRQ_ENT_REG0_OFFSET);
}
}
/**
* This function will un-mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_umask(int irq)
{
unsigned int mask;
rt_uint32_t l;
mask = 1 << IRQ_BIT(irq);
if (irq > 31) {
l = davinci_irq_readl(IRQ_ENT_REG1_OFFSET);
l |= mask;
davinci_irq_writel(l, IRQ_ENT_REG1_OFFSET);
} else {
l = davinci_irq_readl(IRQ_ENT_REG0_OFFSET);
l |= mask;
davinci_irq_writel(l, IRQ_ENT_REG0_OFFSET);
}
}
/**
* This function will install a interrupt service routine to a interrupt.
* @param vector the interrupt number
* @param handler the interrupt service routine to be installed
* @param param the interrupt service function parameter
* @param name the interrupt name
* @return old handler
*/
rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
void *param, char *name)
{
rt_isr_handler_t old_handler = RT_NULL;
if(vector < MAX_HANDLERS)
{
old_handler = irq_desc[vector].handler;
if (handler != RT_NULL)
{
irq_desc[vector].handler = (rt_isr_handler_t)handler;
irq_desc[vector].param = param;
#ifdef RT_USING_INTERRUPT_INFO
rt_snprintf(irq_desc[vector].name, RT_NAME_MAX - 1, "%s", name);
irq_desc[vector].counter = 0;
#endif
}
}
return old_handler;
}
#ifdef RT_USING_FINSH
#ifdef RT_USING_INTERRUPT_INFO
void list_irq(void)
{
int irq;
rt_kprintf("number\tcount\tname\n");
for (irq = 0; irq < MAX_HANDLERS; irq++)
{
if (rt_strncmp(irq_desc[irq].name, "default", sizeof("default")))
{
rt_kprintf("%02ld: %10ld %s\n", irq, irq_desc[irq].counter, irq_desc[irq].name);
}
}
}
#include <finsh.h>
FINSH_FUNCTION_EXPORT(list_irq, list system irq);
#ifdef FINSH_USING_MSH
int cmd_list_irq(int argc, char** argv)
{
list_irq();
return 0;
}
FINSH_FUNCTION_EXPORT_ALIAS(cmd_list_irq, __cmd_list_irq, list system irq.);
#endif
#endif
#endif
/*@}*/
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