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/* interrupts.c -- interrupt handling for OpenRISC 1000.
*
* Copyright (c) 2014 Authors
*
* Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de>
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#include "include/or1k-support.h"
#include "include/or1k-sprs.h"
#include <stdint.h>
#include "or1k-internals.h"
#ifdef __OR1K_MULTICORE__
or1k_interrupt_handler_table_t *_or1k_interrupt_handler_table;
or1k_interrupt_handler_data_ptr_table_t *_or1k_interrupt_handler_data_ptr_table;
#else
or1k_interrupt_handler_table_t _or1k_interrupt_handler_table;
or1k_interrupt_handler_data_ptr_table_t _or1k_interrupt_handler_data_ptr_table;
#endif
void or1k_interrupt_handler_add(uint32_t id,
or1k_interrupt_handler_fptr handler,
void *data_ptr)
{
#ifdef __OR1K_MULTICORE__
_or1k_interrupt_handler_table[or1k_coreid()][id] = handler;
_or1k_interrupt_handler_data_ptr_table[or1k_coreid()][id] = (uint32_t) data_ptr;
#else
_or1k_interrupt_handler_table[id] = handler;
_or1k_interrupt_handler_data_ptr_table[id] = (uint32_t) data_ptr;
#endif
}
void
or1k_interrupts_enable(void)
{
uint32_t sr = or1k_mfspr(OR1K_SPR_SYS_SR_ADDR);
sr = OR1K_SPR_SYS_SR_IEE_SET(sr, 1);
or1k_mtspr(OR1K_SPR_SYS_SR_ADDR, sr);
}
uint32_t
or1k_interrupts_disable(void)
{
uint32_t oldsr, newsr;
oldsr= or1k_mfspr(OR1K_SPR_SYS_SR_ADDR);
newsr = OR1K_SPR_SYS_SR_IEE_SET(oldsr, 0);
or1k_mtspr(OR1K_SPR_SYS_SR_ADDR, newsr);
return OR1K_SPR_SYS_SR_IEE_GET(oldsr);
}
void
or1k_interrupts_restore(uint32_t sr_iee)
{
uint32_t sr = or1k_mfspr(OR1K_SPR_SYS_SR_ADDR);
sr = OR1K_SPR_SYS_SR_IEE_SET(sr, sr_iee);
or1k_mtspr(OR1K_SPR_SYS_SR_ADDR, sr);
}
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