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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
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*
* * Redistributions of source code must retain the above copyright
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*
* * 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.
* * Neither the name of Cavium Networks nor the names of
* its contributors may be used to endorse or promote products
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* This Software, including technical data, may be subject to U.S. export control
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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***********************license end**************************************/
/**
* @file
*
* Interface to the Mips interrupts.
*
* <hr>$Revision: 49448 $<hr>
*/
#ifndef __CVMX_INTERRUPT_H__
#define __CVMX_INTERRUPT_H__
#ifdef __cplusplus
extern "C" {
#endif
/**
* Enumeration of Interrupt numbers
*/
typedef enum
{
/* 0 - 7 represent the 8 MIPS standard interrupt sources */
CVMX_IRQ_SW0 = 0,
CVMX_IRQ_SW1 = 1,
CVMX_IRQ_CIU0 = 2,
CVMX_IRQ_CIU1 = 3,
CVMX_IRQ_4 = 4,
CVMX_IRQ_5 = 5,
CVMX_IRQ_6 = 6,
CVMX_IRQ_7 = 7,
/* 8 - 71 represent the sources in CIU_INTX_EN0 */
CVMX_IRQ_WORKQ0 = 8,
CVMX_IRQ_WORKQ1 = 9,
CVMX_IRQ_WORKQ2 = 10,
CVMX_IRQ_WORKQ3 = 11,
CVMX_IRQ_WORKQ4 = 12,
CVMX_IRQ_WORKQ5 = 13,
CVMX_IRQ_WORKQ6 = 14,
CVMX_IRQ_WORKQ7 = 15,
CVMX_IRQ_WORKQ8 = 16,
CVMX_IRQ_WORKQ9 = 17,
CVMX_IRQ_WORKQ10 = 18,
CVMX_IRQ_WORKQ11 = 19,
CVMX_IRQ_WORKQ12 = 20,
CVMX_IRQ_WORKQ13 = 21,
CVMX_IRQ_WORKQ14 = 22,
CVMX_IRQ_WORKQ15 = 23,
CVMX_IRQ_GPIO0 = 24,
CVMX_IRQ_GPIO1 = 25,
CVMX_IRQ_GPIO2 = 26,
CVMX_IRQ_GPIO3 = 27,
CVMX_IRQ_GPIO4 = 28,
CVMX_IRQ_GPIO5 = 29,
CVMX_IRQ_GPIO6 = 30,
CVMX_IRQ_GPIO7 = 31,
CVMX_IRQ_GPIO8 = 32,
CVMX_IRQ_GPIO9 = 33,
CVMX_IRQ_GPIO10 = 34,
CVMX_IRQ_GPIO11 = 35,
CVMX_IRQ_GPIO12 = 36,
CVMX_IRQ_GPIO13 = 37,
CVMX_IRQ_GPIO14 = 38,
CVMX_IRQ_GPIO15 = 39,
CVMX_IRQ_MBOX0 = 40,
CVMX_IRQ_MBOX1 = 41,
CVMX_IRQ_UART0 = 42,
CVMX_IRQ_UART1 = 43,
CVMX_IRQ_PCI_INT0 = 44,
CVMX_IRQ_PCI_INT1 = 45,
CVMX_IRQ_PCI_INT2 = 46,
CVMX_IRQ_PCI_INT3 = 47,
CVMX_IRQ_PCI_MSI0 = 48,
CVMX_IRQ_PCI_MSI1 = 49,
CVMX_IRQ_PCI_MSI2 = 50,
CVMX_IRQ_PCI_MSI3 = 51,
CVMX_IRQ_RESERVED44 = 52,
CVMX_IRQ_TWSI = 53,
CVMX_IRQ_RML = 54,
CVMX_IRQ_TRACE = 55,
CVMX_IRQ_GMX_DRP0 = 56,
CVMX_IRQ_GMX_DRP1 = 57, /* Doesn't apply on CN52XX or CN63XX */
CVMX_IRQ_IPD_DRP = 58,
CVMX_IRQ_KEY_ZERO = 59, /* Doesn't apply on CN52XX or CN63XX */
CVMX_IRQ_TIMER0 = 60,
CVMX_IRQ_TIMER1 = 61,
CVMX_IRQ_TIMER2 = 62,
CVMX_IRQ_TIMER3 = 63,
CVMX_IRQ_USB0 = 64, /* Doesn't apply on CN38XX or CN58XX */
CVMX_IRQ_PCM = 65, /* Doesn't apply on CN52XX or CN63XX */
CVMX_IRQ_MPI = 66, /* Doesn't apply on CN52XX or CN63XX */
CVMX_IRQ_TWSI2 = 67, /* Added in CN56XX */
CVMX_IRQ_POWIQ = 68, /* Added in CN56XX */
CVMX_IRQ_IPDPPTHR = 69, /* Added in CN56XX */
CVMX_IRQ_MII = 70, /* Added in CN56XX */
CVMX_IRQ_BOOTDMA = 71, /* Added in CN56XX */
/* 72 - 135 represent the sources in CIU_INTX_EN1 */
CVMX_IRQ_WDOG0 = 72,
CVMX_IRQ_WDOG1 = 73,
CVMX_IRQ_WDOG2 = 74,
CVMX_IRQ_WDOG3 = 75,
CVMX_IRQ_WDOG4 = 76,
CVMX_IRQ_WDOG5 = 77,
CVMX_IRQ_WDOG6 = 78,
CVMX_IRQ_WDOG7 = 79,
CVMX_IRQ_WDOG8 = 80,
CVMX_IRQ_WDOG9 = 81,
CVMX_IRQ_WDOG10= 82,
CVMX_IRQ_WDOG11= 83,
CVMX_IRQ_WDOG12= 84,
CVMX_IRQ_WDOG13= 85,
CVMX_IRQ_WDOG14= 86,
CVMX_IRQ_WDOG15= 87,
CVMX_IRQ_UART2 = 88, /* Added in CN52XX */
CVMX_IRQ_USB1 = 89, /* Added in CN52XX */
CVMX_IRQ_MII1 = 90, /* Added in CN52XX */
CVMX_IRQ_NAND = 91, /* Added in CN52XX */
CVMX_IRQ_MIO = 92, /* Added in CN63XX */
CVMX_IRQ_IOB = 93, /* Added in CN63XX */
CVMX_IRQ_FPA = 94, /* Added in CN63XX */
CVMX_IRQ_POW = 95, /* Added in CN63XX */
CVMX_IRQ_L2C = 96, /* Added in CN63XX */
CVMX_IRQ_IPD = 97, /* Added in CN63XX */
CVMX_IRQ_PIP = 98, /* Added in CN63XX */
CVMX_IRQ_PKO = 99, /* Added in CN63XX */
CVMX_IRQ_ZIP = 100, /* Added in CN63XX */
CVMX_IRQ_TIM = 101, /* Added in CN63XX */
CVMX_IRQ_RAD = 102, /* Added in CN63XX */
CVMX_IRQ_KEY = 103, /* Added in CN63XX */
CVMX_IRQ_DFA = 104, /* Added in CN63XX */
CVMX_IRQ_USB = 105, /* Added in CN63XX */
CVMX_IRQ_SLI = 106, /* Added in CN63XX */
CVMX_IRQ_DPI = 107, /* Added in CN63XX */
CVMX_IRQ_AGX0 = 108, /* Added in CN63XX */
/* 109 - 117 are reserved */
CVMX_IRQ_AGL = 118, /* Added in CN63XX */
CVMX_IRQ_PTP = 119, /* Added in CN63XX */
CVMX_IRQ_PEM0 = 120, /* Added in CN63XX */
CVMX_IRQ_PEM1 = 121, /* Added in CN63XX */
CVMX_IRQ_SRIO0 = 122, /* Added in CN63XX */
CVMX_IRQ_SRIO1 = 123, /* Added in CN63XX */
CVMX_IRQ_LMC0 = 124, /* Added in CN63XX */
/* Interrupts 125 - 127 are reserved */
CVMX_IRQ_DFM = 128, /* Added in CN63XX */
/* Interrupts 129 - 135 are reserved */
} cvmx_irq_t;
/**
* Function prototype for the exception handler
*/
typedef void (*cvmx_interrupt_exception_t)(uint64_t registers[32]);
/**
* Function prototype for interrupt handlers
*/
typedef void (*cvmx_interrupt_func_t)(int irq_number, uint64_t registers[32], void *user_arg);
/**
* Register an interrupt handler for the specified interrupt number.
*
* @param irq_number Interrupt number to register for (0-135)
* @param func Function to call on interrupt.
* @param user_arg User data to pass to the interrupt handler
*/
void cvmx_interrupt_register(cvmx_irq_t irq_number, cvmx_interrupt_func_t func, void *user_arg);
/**
* Set the exception handler for all non interrupt sources.
*
* @param handler New exception handler
* @return Old exception handler
*/
cvmx_interrupt_exception_t cvmx_interrupt_set_exception(cvmx_interrupt_exception_t handler);
/**
* Masks a given interrupt number.
* EN0 sources are masked on IP2
* EN1 sources are masked on IP3
*
* @param irq_number interrupt number to mask (0-135)
*/
static inline void cvmx_interrupt_mask_irq(int irq_number)
{
if (irq_number<8)
{
uint32_t mask;
asm volatile ("mfc0 %0,$12,0" : "=r" (mask));
mask &= ~(1<< (8 + irq_number));
asm volatile ("mtc0 %0,$12,0" : : "r" (mask));
}
else if (irq_number < 8 + 64)
{
int ciu_bit = (irq_number - 8) & 63;
int ciu_offset = cvmx_get_core_num() * 2;
uint64_t mask = cvmx_read_csr(CVMX_CIU_INTX_EN0(ciu_offset));
mask &= ~(1ull << ciu_bit);
cvmx_write_csr(CVMX_CIU_INTX_EN0(ciu_offset), mask);
}
else
{
int ciu_bit = (irq_number - 8) & 63;
int ciu_offset = cvmx_get_core_num() * 2 + 1;
uint64_t mask = cvmx_read_csr(CVMX_CIU_INTX_EN1(ciu_offset));
mask &= ~(1ull << ciu_bit);
cvmx_write_csr(CVMX_CIU_INTX_EN1(ciu_offset), mask);
}
}
/**
* Unmasks a given interrupt number
* EN0 sources are unmasked on IP2
* EN1 sources are unmasked on IP3
*
* @param irq_number interrupt number to unmask (0-135)
*/
static inline void cvmx_interrupt_unmask_irq(int irq_number)
{
if (irq_number<8)
{
uint32_t mask;
asm volatile ("mfc0 %0,$12,0" : "=r" (mask));
mask |= (1<< (8 + irq_number));
asm volatile ("mtc0 %0,$12,0" : : "r" (mask));
}
else if (irq_number < 8 + 64)
{
int ciu_bit = (irq_number - 8) & 63;
int ciu_offset = cvmx_get_core_num() * 2;
uint64_t mask = cvmx_read_csr(CVMX_CIU_INTX_EN0(ciu_offset));
mask |= (1ull << ciu_bit);
cvmx_write_csr(CVMX_CIU_INTX_EN0(ciu_offset), mask);
}
else
{
int ciu_bit = (irq_number - 8) & 63;
int ciu_offset = cvmx_get_core_num() * 2 + 1;
uint64_t mask = cvmx_read_csr(CVMX_CIU_INTX_EN1(ciu_offset));
mask |= (1ull << ciu_bit);
cvmx_write_csr(CVMX_CIU_INTX_EN1(ciu_offset), mask);
}
}
/* Disable interrupts by clearing bit 0 of the COP0 status register,
** and return the previous contents of the status register.
** Note: this is only used to track interrupt status. */
static inline uint32_t cvmx_interrupt_disable_save(void)
{
uint32_t flags;
asm volatile (
"DI %[flags]\n"
: [flags]"=r" (flags));
return(flags);
}
/* Restore the contents of the cop0 status register. Used with
** cvmx_interrupt_disable_save to allow recursive interrupt disabling */
static inline void cvmx_interrupt_restore(uint32_t flags)
{
/* If flags value indicates interrupts should be enabled, then enable them */
if (flags & 1)
{
asm volatile (
"EI \n"
::);
}
}
#define cvmx_local_irq_save(x) ({x = cvmx_interrupt_disable_save();})
#define cvmx_local_irq_restore(x) cvmx_interrupt_restore(x)
/**
* Utility function to do interrupt safe printf
*/
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#define cvmx_safe_printf printk
#elif defined(CVMX_BUILD_FOR_LINUX_USER)
#define cvmx_safe_printf printf
#else
extern void cvmx_safe_printf(const char* format, ... ) __attribute__ ((format(printf, 1, 2)));
#endif
#define PRINT_ERROR(format, ...) cvmx_safe_printf("ERROR " format, ##__VA_ARGS__)
#ifdef __cplusplus
}
#endif
#endif