diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_init.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_init.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_init.c b/c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_init.c new file mode 100644 index 0000000000..166185eac5 --- /dev/null +++ b/c/src/lib/libbsp/powerpc/mpc8260ads/irq/irq_init.c @@ -0,0 +1,150 @@ +/* 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.OARcorp.com/rtems/license.html. + * + * $Id$ + */ +#include <bsp/irq.h> +#include <bsp.h> +#include <bspIo.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(); + +extern void BSP_panic(char *s); +extern void _BSP_Fatal_error(unsigned int v); +/* +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 priorities for interrupt : + */ + /* + * CPM Interrupts + */ + 0, 45, 63, 44, 66, 68, 35, 39, 50, 62, 34, 0, 30, 40, 52, 58, + 2, 3, 0, 5, 15, 16, 17, 18, 49, 51, 0, 0, 0, 0, 0, 0, + 6, 7, 8, 0, 11, 12, 0, 0, 20, 21, 22, 23, 0, 0, 0, 0, + 29, 31, 33, 37, 38, 41, 47, 48, 55, 56, 57, 60, 64, 65, 69, 70, + /* + * Processor exceptions handled as interrupts + */ + 0 +}; + + +/* + * Initialize CPM interrupt management + */ +void +BSP_CPM_irq_init(void) +{ + m8260.simr_l = 0; + m8260.simr_h = 0; + m8260.sipnr_l = 0xffffffff; + m8260.sipnr_h = 0xffffffff; + m8260.sicr = 0; + + /* + * Initialize the interrupt priorities. + */ + m8260.siprr = 0x05309770; /* reset value */ + m8260.scprr_h = 0x05309770; /* reset value */ + m8260.scprr_l = 0x05309770; /* reset value */ + +} + +void BSP_rtems_irq_mng_init(unsigned cpuId) +{ + rtems_raw_except_connect_data vectorDesc; + int i; + + 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 +} + |