diff options
Diffstat (limited to 'c/src/lib/libcpu/m68k/mcf548x/mcdma/mcdma_glue.c')
| -rw-r--r-- | c/src/lib/libcpu/m68k/mcf548x/mcdma/mcdma_glue.c | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/c/src/lib/libcpu/m68k/mcf548x/mcdma/mcdma_glue.c b/c/src/lib/libcpu/m68k/mcf548x/mcdma/mcdma_glue.c deleted file mode 100644 index d3d6115143..0000000000 --- a/c/src/lib/libcpu/m68k/mcf548x/mcdma/mcdma_glue.c +++ /dev/null @@ -1,226 +0,0 @@ -/*===============================================================*\ -| Project: RTEMS generic MCF548x BSP | -+-----------------------------------------------------------------+ -| Copyright (c) 2004-2009 | -| 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.org/license/LICENSE. | -| | -+-----------------------------------------------------------------+ -| this file contains glue functions to the Freescale MC_DMA API | -\*===============================================================*/ -#include <rtems.h> -#include <rtems/error.h> -#include <bsp.h> -#include <mcf548x/mcf548x.h> -#include <mcf548x/MCD_dma.h> -#include <mcf548x/mcdma_glue.h> - -#define MCDMA_INT_ENABLE(reg,chan) (reg &= ~(1 << (chan))) -#define MCDMA_INT_DISABLE(reg,chan) (reg |= (1 << (chan))) -#define MCDMA_CLEAR_IEVENT(reg,chan) (reg = (1 << (chan))) - -#define MCDMA_INT_BIT_IMPL 0x0000FFFF /* implemented IRQ sources (bitmask for IPEND... */ -#define MCDMA_IRQ_VECTOR (48+64) -#define MCDMA_IRQ_LEVEL (2) -#define MCDMA_IRQ_PRIORITY (2) -/*=========================================================================*\ -| Function: | -\*-------------------------------------------------------------------------*/ -void mcdma_glue_irq_enable -( -/*-------------------------------------------------------------------------*\ -| Purpose: | -| enable interrupt for given task number | -+---------------------------------------------------------------------------+ -| Input Parameters: | -\*-------------------------------------------------------------------------*/ - int mcdma_channo /* task number to enable */ -) -/*-------------------------------------------------------------------------*\ -| Return Value: | -| none | -\*=========================================================================*/ -{ - rtems_interrupt_level level; - if (0 != ((1UL<<mcdma_channo) & MCDMA_INT_BIT_IMPL)) { - rtems_interrupt_disable(level); - /* - * valid task number - * enable interrupt in mcdma mask - */ - MCDMA_INT_ENABLE(MCF548X_DMA_DIMR,mcdma_channo); - rtems_interrupt_enable(level); - } -} - -/*=========================================================================*\ -| Function: | -\*-------------------------------------------------------------------------*/ -void mcdma_glue_irq_disable -( -/*-------------------------------------------------------------------------*\ -| Purpose: | -| disable interrupt for given task number | -+---------------------------------------------------------------------------+ -| Input Parameters: | -\*-------------------------------------------------------------------------*/ - int mcdma_channo /* task number to disable */ -) -/*-------------------------------------------------------------------------*\ -| Return Value: | -| none | -\*=========================================================================*/ -{ - rtems_interrupt_level level; - if (0 != ((1UL<<mcdma_channo) & MCDMA_INT_BIT_IMPL)) { - rtems_interrupt_disable(level); - /* - * valid task number - * disable interrupt in mcdma mask - */ - MCDMA_INT_DISABLE(MCF548X_DMA_DIMR,mcdma_channo); - rtems_interrupt_enable(level); - } -} - -typedef struct { - void (*the_handler)(void *param); - void *the_param; -} mcdma_glue_irq_handlers_t; - -mcdma_glue_irq_handlers_t mcdma_glue_irq_handlers[32]; - -/*=========================================================================*\ -| Function: | -\*-------------------------------------------------------------------------*/ -void mcdma_glue_irq_install -( -/*-------------------------------------------------------------------------*\ -| Purpose: | -| install given function as mcdma interrupt handler | -+---------------------------------------------------------------------------+ -| Input Parameters: | -\*-------------------------------------------------------------------------*/ - int mcdma_channo, /* task number for handler */ - void (*the_handler)(void *), /* function to call */ - void *the_param -) -/*-------------------------------------------------------------------------*\ -| Return Value: | -| none | -\*=========================================================================*/ -{ - if (0 != ((1UL<<mcdma_channo) & MCDMA_INT_BIT_IMPL)) { - /* - * valid task number - * install handler - */ - mcdma_glue_irq_handlers[mcdma_channo].the_handler = the_handler; - mcdma_glue_irq_handlers[mcdma_channo].the_param = the_param; - } -} - -/*=========================================================================*\ -| Function: | -\*-------------------------------------------------------------------------*/ -static rtems_isr mcdma_glue_irq_dispatcher -( -/*-------------------------------------------------------------------------*\ -| Purpose: | -| general mcdma interrupt handler/dispatcher | -+---------------------------------------------------------------------------+ -| Input Parameters: | -\*-------------------------------------------------------------------------*/ - rtems_vector_number v /* irq specific handle (not used) */ - -) -/*-------------------------------------------------------------------------*\ -| Return Value: | -| none | -\*=========================================================================*/ -{ - uint32_t pending; - int curr_channo; - - pending = MCF548X_DMA_DIPR & ~MCF548X_DMA_DIMR; - curr_channo = 0; - while (pending != 0) { - if ((pending & (1UL<<curr_channo)) != 0) { - if (mcdma_glue_irq_handlers[curr_channo].the_handler == NULL) { - /* - * This should never happen. we have a pending IRQ but no handler - * let's clear this pending bit - */ - MCDMA_CLEAR_IEVENT(MCF548X_DMA_DIPR,curr_channo); - } - else { - /* - * call proper handler - */ - mcdma_glue_irq_handlers[curr_channo].the_handler - (mcdma_glue_irq_handlers[curr_channo].the_param); - } - /* - * clear this bit in our pending copy - * and go to next bit - */ - pending &= ~(1<<curr_channo); - } - curr_channo++; - } -} - -static bool mcdma_glue_is_initialized = false; -/*=========================================================================*\ -| Function: | -\*-------------------------------------------------------------------------*/ -void mcdma_glue_init -( -/*-------------------------------------------------------------------------*\ -| Purpose: | -| initialize the mcdma module (if not yet done): | -| - load code | -| - initialize registers | -| - initialize bus arbiter | -| - initialize interrupt control | -+---------------------------------------------------------------------------+ -| Input Parameters: | -\*-------------------------------------------------------------------------*/ - void *sram_base /* base address for SRAM, to be used for DMA task */ -) -/*-------------------------------------------------------------------------*\ -| Return Value: | -| none | -\*=========================================================================*/ -{ - rtems_isr_entry old_handler; - if (!mcdma_glue_is_initialized) { - mcdma_glue_is_initialized = true; - - MCD_initDma((dmaRegs *)&MCF548X_DMA_TASKBAR, - sram_base, - MCD_TT_FLAGS_DEF); - - /* - * initialize interrupt dispatcher - */ - if(rtems_interrupt_catch(mcdma_glue_irq_dispatcher, - MCDMA_IRQ_VECTOR, - &old_handler)) { - rtems_panic ("Can't attach MFC548x MCDma interrupt handler\n"); - } - MCF548X_INTC_ICRn(MCDMA_IRQ_VECTOR - 64) = - MCF548X_INTC_ICRn_IL(MCDMA_IRQ_LEVEL) | - MCF548X_INTC_ICRn_IP(MCDMA_IRQ_PRIORITY); - - MCF548X_INTC_IMRH &= ~(1 << (MCDMA_IRQ_VECTOR % 32)); - } -} |