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bsp/leon3: Add and use LEON3_IrqCtrl_Lock

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Disabling of interrupts is not enough to ensure mutual exclusion on SMP
configurations.
This commit is contained in:
Sebastian Huber
2014-02-18 12:42:58 +01:00
parent 8a65a96007
commit 2cb0877f3a
2 changed files with 23 additions and 13 deletions
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2
c/src/lib/libbsp/sparc/leon3/amba/amba.c
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@@ -23,6 +23,8 @@
*/
struct ambapp_bus ambapp_plb;
rtems_interrupt_lock LEON3_IrqCtrl_Lock = RTEMS_INTERRUPT_LOCK_INITIALIZER;
/* Pointers to Interrupt Controller configuration registers */
volatile struct irqmp_regs *LEON3_IrqCtrl_Regs;

34
c/src/lib/libbsp/sparc/leon3/include/leon.h
View File

@@ -23,7 +23,7 @@
#ifndef _INCLUDE_LEON_h
#define _INCLUDE_LEON_h
#include <rtems/score/sparc.h>
#include <rtems.h>
#include <amba.h>
#ifdef __cplusplus
@@ -167,6 +167,14 @@ static __inline__ int bsp_irq_fixup(int irq)
* store the result back are vulnerable.
*/
extern rtems_interrupt_lock LEON3_IrqCtrl_Lock;
#define LEON3_IRQCTRL_ACQUIRE(_level ) \
rtems_interrupt_lock_acquire( &LEON3_IrqCtrl_Lock, _level )
#define LEON3_IRQCTRL_RELEASE(_level ) \
rtems_interrupt_lock_release( &LEON3_IrqCtrl_Lock, _level )
#define LEON_Clear_interrupt( _source ) \
do { \
LEON3_IrqCtrl_Regs->iclear = (1 << (_source)); \
@@ -187,39 +195,39 @@ static __inline__ int bsp_irq_fixup(int irq)
#define LEON_Mask_interrupt( _source ) \
do { \
uint32_t _level; \
_level = sparc_disable_interrupts(); \
rtems_interrupt_level _level; \
LEON3_IRQCTRL_ACQUIRE( _level ); \
LEON3_IrqCtrl_Regs->mask[LEON3_Cpu_Index] &= ~(1 << (_source)); \
sparc_enable_interrupts( _level ); \
LEON3_IRQCTRL_RELEASE( _level ); \
} while (0)
#define LEON_Unmask_interrupt( _source ) \
do { \
uint32_t _level; \
_level = sparc_disable_interrupts(); \
rtems_interrupt_level _level; \
LEON3_IRQCTRL_ACQUIRE( _level ); \
LEON3_IrqCtrl_Regs->mask[LEON3_Cpu_Index] |= (1 << (_source)); \
sparc_enable_interrupts( _level ); \
LEON3_IRQCTRL_RELEASE( _level ); \
} while (0)
#define LEON_Disable_interrupt( _source, _previous ) \
do { \
uint32_t _level; \
rtems_interrupt_level _level; \
uint32_t _mask = 1 << (_source); \
_level = sparc_disable_interrupts(); \
LEON3_IRQCTRL_ACQUIRE( _level ); \
(_previous) = LEON3_IrqCtrl_Regs->mask[LEON3_Cpu_Index]; \
LEON3_IrqCtrl_Regs->mask[LEON3_Cpu_Index] = _previous & ~_mask; \
sparc_enable_interrupts( _level ); \
LEON3_IRQCTRL_RELEASE( _level ); \
(_previous) &= _mask; \
} while (0)
#define LEON_Restore_interrupt( _source, _previous ) \
do { \
uint32_t _level; \
rtems_interrupt_level _level; \
uint32_t _mask = 1 << (_source); \
_level = sparc_disable_interrupts(); \
LEON3_IRQCTRL_ACQUIRE( _level ); \
LEON3_IrqCtrl_Regs->mask[LEON3_Cpu_Index] = \
(LEON3_IrqCtrl_Regs->mask[LEON3_Cpu_Index] & ~_mask) | (_previous); \
sparc_enable_interrupts( _level ); \
LEON3_IRQCTRL_RELEASE( _level ); \
} while (0)
/* Make all SPARC BSPs have common macros for interrupt handling */