diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/virtex5/irq/irq_init.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/virtex5/irq/irq_init.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/virtex5/irq/irq_init.c b/c/src/lib/libbsp/powerpc/virtex5/irq/irq_init.c new file mode 100644 index 0000000000..ffcfe4ca11 --- /dev/null +++ b/c/src/lib/libbsp/powerpc/virtex5/irq/irq_init.c @@ -0,0 +1,326 @@ +/*===============================================================*\ +| Project: RTEMS virtex BSP | ++-----------------------------------------------------------------+ +| Partially based on the code references which are named below. | +| Adaptions, modifications, enhancements and any recent parts of | +| the code are: | +| Copyright (c) 2007 | +| Embedded Brains GmbH | +| Obere Lagerstr. 30 | +| D-82178 Puchheim | +| Germany | +| rtems@embedded-brains.de | ++-----------------------------------------------------------------+ +| 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. | +| | ++-----------------------------------------------------------------+ +| this file contains the irq controller handler | +\*===============================================================*/ +#include <libcpu/spr.h> +#include <bsp/irq.h> +#include <bsp.h> +#include <rtems/bspIo.h> +#include <rtems/powerpc/powerpc.h> +#include <bsp/vectors.h> + +static rtems_irq_connect_data rtemsIrqTbl[BSP_IRQ_NUMBER]; +rtems_irq_connect_data *BSP_rtems_irq_tbl; +rtems_irq_global_settings* BSP_rtems_irq_config; + +/*********************************************************** + * dummy functions for on/off/isOn calls + * these functions just do nothing fulfill the semantic + * requirements to enable/disable a certain interrupt or exception + */ +void BSP_irq_nop_func(const rtems_irq_connect_data *unused) +{ + /* + * nothing to do + */ +} + +void BSP_irq_nop_hdl(void *hdl) +{ + /* + * nothing to do + */ +} + +int BSP_irq_isOn_func(const rtems_irq_connect_data *unused) +{ + /* + * nothing to do + */ + return 0; +} + +/*********************************************************** + * interrupt handler and its enable/disable functions + ***********************************************************/ + +/*********************************************************** + * functions to enable/disable/query external/critical interrupts + */ +void BSP_irqexc_on_fnc(rtems_irq_connect_data *conn_data) +{ + uint32_t msr_value; + /* + * get current MSR value + */ + _CPU_MSR_GET(msr_value); + + msr_value |= PPC_MSR_EE; + _CPU_MSR_SET(msr_value); +} + +void BSP_irqexc_off_fnc(rtems_irq_connect_data *unused) +{ + uint32_t msr_value; + /* + * get current MSR value + */ + _CPU_MSR_GET(msr_value); + + msr_value &= ~PPC_MSR_EE; + _CPU_MSR_SET(msr_value); +} + +/*********************************************************** + * High level IRQ handler called from shared_raw_irq_code_entry + */ +int C_dispatch_irq_handler (BSP_Exception_frame *frame, unsigned int excNum) +{ + /* + * Handle interrupt + */ + switch(excNum) { + case ASM_EXT_VECTOR: + BSP_rtems_irq_tbl[BSP_EXT].hdl(BSP_rtems_irq_tbl[BSP_EXT].handle); + break; + case ASM_BOOKE_DEC_VECTOR: + BSP_rtems_irq_tbl[BSP_PIT].hdl(BSP_rtems_irq_tbl[BSP_PIT].handle); + break; +#if 0 /* Critical interrupts not yet supported */ + case ASM_BOOKE_CRIT_VECTOR: + BSP_rtems_irq_tbl[BSP_CRIT].hdl(BSP_rtems_irq_tbl[BSP_CRIT].handle); + break; +#endif + } + + return 0; +} + +/*********************************************************** + * functions to set/get/remove interrupt handlers + ***********************************************************/ +int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq) +{ + rtems_interrupt_level level; + + /* + * check for valid irq name + * if invalid, print error and return 0 + */ + if (!BSP_IS_VALID_IRQ(irq->name)) { + printk("Invalid interrupt vector %d\n",irq->name); + return 0; + } + + /* + * disable interrupts + */ + rtems_interrupt_disable(level); + + /* + * check, that default handler is installed now + */ + if (rtemsIrqTbl[irq->name].hdl != BSP_rtems_irq_config->defaultEntry.hdl) { + rtems_interrupt_enable(level); + printk("IRQ vector %d already connected\n",irq->name); + return 0; + } + + /* + * store new handler data + */ + rtemsIrqTbl[irq->name] = *irq; + + /* + * call "on" function to enable interrupt at device + */ + irq->on(irq); + + /* + * reenable interrupts + */ + rtems_interrupt_enable(level); + + return 1; +} + +int BSP_get_current_rtems_irq_handler (rtems_irq_connect_data* irq) +{ + rtems_interrupt_level level; + + /* + * check for valid IRQ name + */ + if (!BSP_IS_VALID_IRQ(irq->name)) { + return 0; + } + rtems_interrupt_disable(level); + + /* + * return current IRQ entry + */ + *irq = rtemsIrqTbl[irq->name]; + rtems_interrupt_enable(level); + return 1; +} + +int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq) +{ + rtems_interrupt_level level; + + /* + * check for valid IRQ name + */ + if (!BSP_IS_VALID_IRQ(irq->name)) { + return 0; + } + rtems_interrupt_disable(level); + + /* + * check, that specified handler is really connected now + */ + if (rtemsIrqTbl[irq->name].hdl != irq->hdl) { + rtems_interrupt_enable(level); + return 0; + } + + /* + * disable interrupt at source + */ + irq->off(irq); + + /* + * restore default interrupt handler + */ + rtemsIrqTbl[irq->name] = BSP_rtems_irq_config->defaultEntry; + + /* + * reenable interrupts + */ + rtems_interrupt_enable(level); + + return 1; +} + +/*********************************************************** + * functions to set/get the basic interrupt management setup + ***********************************************************/ +/* + * (Re) get info on current RTEMS interrupt management. + */ +int BSP_rtems_irq_mngt_get(rtems_irq_global_settings** ret_ptr) +{ + *ret_ptr = BSP_rtems_irq_config; + return 0; +} + + +/* + * set management stuff + */ +int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config) +{ + int i; + rtems_interrupt_level level; + + rtems_interrupt_disable(level); + + /* + * store given configuration + */ + BSP_rtems_irq_config = config; + BSP_rtems_irq_tbl = BSP_rtems_irq_config->irqHdlTbl; + + /* + * store any irq-like processor exceptions + */ + for (i = BSP_PROCESSOR_IRQ_LOWEST_OFFSET; + i < BSP_PROCESSOR_IRQ_MAX_OFFSET; + i++) { + if (BSP_rtems_irq_tbl[i].hdl != config->defaultEntry.hdl) { + if (BSP_rtems_irq_tbl[i].on != NULL) { + BSP_rtems_irq_tbl[i].on + (&(BSP_rtems_irq_tbl[i])); + } + } + else { + if (BSP_rtems_irq_tbl[i].off != NULL) { + BSP_rtems_irq_tbl[i].off + (&(BSP_rtems_irq_tbl[i])); + } + } + } + rtems_interrupt_enable(level); + return 1; +} + +/* + * dummy for an empty IRQ handler entry + */ +static rtems_irq_connect_data emptyIrq = { + 0, /* Irq Name */ + BSP_irq_nop_hdl, /* handler function */ + NULL, /* handle passed to handler */ + BSP_irq_nop_func, /* on function */ + BSP_irq_nop_func, /* off function */ + BSP_irq_isOn_func /* isOn function */ +}; + +static rtems_irq_global_settings initialConfig = { + BSP_IRQ_NUMBER, /* irqNb */ + { 0, /* Irq Name */ + BSP_irq_nop_hdl, /* handler function */ + NULL, /* handle passed to handler */ + BSP_irq_nop_func, /* on function */ + BSP_irq_nop_func, /* off function */ + BSP_irq_isOn_func /* isOn function */ + }, /* emptyIrq */ + rtemsIrqTbl, /* irqHdlTbl */ + 0, /* irqBase */ + NULL /* irqPrioTbl */ +}; + +void BSP_rtems_irq_mngt_init(unsigned cpuId) +{ + int i; + + /* + * connect all exception vectors needed + */ + ppc_exc_set_handler(ASM_EXT_VECTOR, C_dispatch_irq_handler); + ppc_exc_set_handler(ASM_BOOKE_DEC_VECTOR, C_dispatch_irq_handler); + + /* + * setup interrupt handlers table + */ + for (i = 0; + i < BSP_IRQ_NUMBER; + i++) { + rtemsIrqTbl[i] = emptyIrq; + rtemsIrqTbl[i].name = i; + } + + /* + * initialize interrupt management + */ + if (!BSP_rtems_irq_mngt_set(&initialConfig)) { + BSP_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n"); + } +} |