/* irq_init.c
*
* This file contains the implementation of rtems initialization
* related to interrupt handling.
*
* CopyRight (C) 2001 valette@crf.canon.fr
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp/irq.h>
#include <bsp.h>
#include <libcpu/raw_exception.h>
#include <bsp/8xx_immap.h>
#include <bsp/mbx.h>
#include <bsp/commproc.h>
extern unsigned int external_exception_vector_prolog_code_size;
extern void external_exception_vector_prolog_code();
extern unsigned int decrementer_exception_vector_prolog_code_size;
extern void decrementer_exception_vector_prolog_code();
volatile unsigned int ppc_cached_irq_mask;
/*
* default on/off function
*/
static void nop_func(){}
/*
* default isOn function
*/
static int not_connected() {return 0;}
/*
* default possible isOn function
*/
static int connected() {return 1;}
static rtems_irq_connect_data rtemsIrq[BSP_IRQ_NUMBER];
static rtems_irq_global_settings initial_config;
static rtems_irq_connect_data defaultIrq = {
/* vectorIdex, hdl , on , off , isOn */
0, nop_func , nop_func , nop_func , not_connected
};
static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={
/*
* actual rpiorities for interrupt :
* 0 means that only current interrupt is masked
* 255 means all other interrupts are masked
*/
/*
* SIU interrupts.
*/
7,7, 6,6, 5,5, 4,4, 3,3, 2,2, 1,1, 0,0,
/*
* CPM Interrupts
*/
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
/*
* Processor exceptions handled as interrupts
*/
0
};
void BSP_SIU_irq_init()
{
/*
* In theory we should initialize two registers at least :
* SIMASK, SIEL. SIMASK is reset at 0 value meaning no interrupt. But
* we should take care that a monitor may have restoreed to another value.
* If someone find a reasonnable value for SIEL, AND THE NEED TO CHANGE IT
* please feel free to add it here.
*/
((volatile immap_t *)IMAP_ADDR)->im_siu_conf.sc_simask = 0;
((volatile immap_t *)IMAP_ADDR)->im_siu_conf.sc_sipend = 0xffff0000;
ppc_cached_irq_mask = 0;
((volatile immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel = ((volatile immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel;
}
/*
* Initialize CPM interrupt management
*/
void
BSP_CPM_irq_init(void)
{
/*
* Initialize the CPM interrupt controller.
*/
((volatile immap_t *)IMAP_ADDR)->im_cpic.cpic_cicr =
#ifdef mpc860
(CICR_SCD_SCC4 | CICR_SCC_SCC3 | CICR_SCB_SCC2 | CICR_SCA_SCC1) |
#else
(CICR_SCB_SCC2 | CICR_SCA_SCC1) |
#endif
((BSP_CPM_INTERRUPT/2) << 13) | CICR_HP_MASK;
((volatile immap_t *)IMAP_ADDR)->im_cpic.cpic_cimr = 0;
((volatile immap_t *)IMAP_ADDR)->im_cpic.cpic_cicr |= CICR_IEN;
}
void BSP_rtems_irq_mng_init(unsigned cpuId)
{
rtems_raw_except_connect_data vectorDesc;
int i;
BSP_SIU_irq_init();
BSP_CPM_irq_init();
/*
* Initialize Rtems management interrupt table
*/
/*
* re-init the rtemsIrq table
*/
for (i = 0; i < BSP_IRQ_NUMBER; i++) {
rtemsIrq[i] = defaultIrq;
rtemsIrq[i].name = i;
}
/*
* Init initial Interrupt management config
*/
initial_config.irqNb = BSP_IRQ_NUMBER;
initial_config.defaultEntry = defaultIrq;
initial_config.irqHdlTbl = rtemsIrq;
initial_config.irqBase = BSP_ASM_IRQ_VECTOR_BASE;
initial_config.irqPrioTbl = irqPrioTable;
if (!BSP_rtems_irq_mngt_set(&initial_config)) {
/*
* put something here that will show the failure...
*/
BSP_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n");
}
/*
* We must connect the raw irq handler for the two
* expected interrupt sources : decrementer and external interrupts.
*/
vectorDesc.exceptIndex = ASM_DEC_VECTOR;
vectorDesc.hdl.vector = ASM_DEC_VECTOR;
vectorDesc.hdl.raw_hdl = decrementer_exception_vector_prolog_code;
vectorDesc.hdl.raw_hdl_size = (unsigned) &decrementer_exception_vector_prolog_code_size;
vectorDesc.on = nop_func;
vectorDesc.off = nop_func;
vectorDesc.isOn = connected;
if (!mpc8xx_set_exception (&vectorDesc)) {
BSP_panic("Unable to initialize RTEMS decrementer raw exception\n");
}
vectorDesc.exceptIndex = ASM_EXT_VECTOR;
vectorDesc.hdl.vector = ASM_EXT_VECTOR;
vectorDesc.hdl.raw_hdl = external_exception_vector_prolog_code;
vectorDesc.hdl.raw_hdl_size = (unsigned) &external_exception_vector_prolog_code_size;
if (!mpc8xx_set_exception (&vectorDesc)) {
BSP_panic("Unable to initialize RTEMS external raw exception\n");
}
#ifdef TRACE_IRQ_INIT
printk("RTEMS IRQ management is now operationnal\n");
#endif
}
