grlib_impl.h

/*
 * Copyright (C) 2017 Cobham Gaisler AB
 *
 * 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.
 */

#ifndef GRLIB_IMPL_H
#define GRLIB_IMPL_H

#include <rtems/score/basedefs.h>
#include <rtems/malloc.h>

/*
 * Use interrupt lock primitives compatible with SMP defined in RTEMS 4.11.99
 * and higher.
 */
#if (((__RTEMS_MAJOR__ << 16) | (__RTEMS_MINOR__ << 8) | __RTEMS_REVISION__) >= 0x040b63)

#include <rtems/score/isrlock.h>

/* map via rtems_interrupt_lock_* API: */
#define SPIN_DECLARE(lock) RTEMS_INTERRUPT_LOCK_MEMBER(lock)
#define SPIN_INIT(lock, name) rtems_interrupt_lock_initialize(lock, name)
#define SPIN_LOCK(lock, level) rtems_interrupt_lock_acquire_isr(lock, &level)
#define SPIN_LOCK_IRQ(lock, level) rtems_interrupt_lock_acquire(lock, &level)
#define SPIN_UNLOCK(lock, level) rtems_interrupt_lock_release_isr(lock, &level)
#define SPIN_UNLOCK_IRQ(lock, level) rtems_interrupt_lock_release(lock, &level)
#define SPIN_IRQFLAGS(k) rtems_interrupt_lock_context k
#define SPIN_ISR_IRQFLAGS(k) SPIN_IRQFLAGS(k)
#define SPIN_FREE(lock) rtems_interrupt_lock_destroy(lock)

/* turn on/off local CPU's interrupt to ensure HW timing - not SMP safe. */
#define IRQ_LOCAL_DECLARE(_level) rtems_interrupt_level _level
#define IRQ_LOCAL_DISABLE(_level) rtems_interrupt_local_disable(_level)
#define IRQ_LOCAL_ENABLE(_level) rtems_interrupt_local_enable(_level)

#else

#ifdef RTEMS_SMP
#error SMP mode not compatible with these interrupt lock primitives
#endif

/* maintain single-core compatibility with older versions of RTEMS: */
#define SPIN_DECLARE(name)
#define SPIN_INIT(lock, name)
#define SPIN_LOCK(lock, level)
#define SPIN_LOCK_IRQ(lock, level) rtems_interrupt_disable(level)
#define SPIN_UNLOCK(lock, level)
#define SPIN_UNLOCK_IRQ(lock, level) rtems_interrupt_enable(level)
#define SPIN_IRQFLAGS(k) rtems_interrupt_level k
#define SPIN_ISR_IRQFLAGS(k)
#define SPIN_FREE(lock)

/* turn on/off local CPU's interrupt to ensure HW timing - not SMP safe. */
#define IRQ_LOCAL_DECLARE(_level) rtems_interrupt_level _level
#define IRQ_LOCAL_DISABLE(_level) rtems_interrupt_disable(_level)
#define IRQ_LOCAL_ENABLE(_level) rtems_interrupt_enable(_level)

#endif

#ifdef __cplusplus
extern "C" {
#endif

#if (((__RTEMS_MAJOR__ << 16) | (__RTEMS_MINOR__ << 8) | __RTEMS_REVISION__) >= 0x050000)

RTEMS_INLINE_ROUTINE void *grlib_malloc(size_t size)
{
 return rtems_malloc(size);
}

RTEMS_INLINE_ROUTINE void *grlib_calloc(size_t nelem, size_t elsize)
{
 return rtems_calloc(nelem, elsize);
}

#else

RTEMS_INLINE_ROUTINE void *grlib_malloc(size_t size)
{
 return malloc(size);
}

RTEMS_INLINE_ROUTINE void *grlib_calloc(size_t nelem, size_t elsize)
{
 return calloc(nelem, elsize);
}

#endif

#ifdef __sparc__

RTEMS_INLINE_ROUTINE unsigned char grlib_read_uncached8(unsigned int address)
{
       unsigned char tmp;
       __asm__ (" lduba [%1]1, %0 "
           : "=r"(tmp)
           : "r"(address)
       );
       return tmp;
}

RTEMS_INLINE_ROUTINE unsigned short grlib_read_uncached16(unsigned int addr) {
       unsigned short tmp;
       __asm__ (" lduha [%1]1, %0 "
         : "=r"(tmp)
         : "r"(addr)
       );
       return tmp;
}


RTEMS_INLINE_ROUTINE unsigned int grlib_read_uncached32(unsigned int address)
{
    unsigned int tmp;
    __asm__ (" lda [%1]1, %0 "
            : "=r"(tmp)
            : "r"(address)
    );
    return tmp;
}

#define GRLIB_DMA_IS_CACHE_COHERENT CPU_SPARC_HAS_SNOOPING

#else

static unsigned char __inline__ grlib_read_uncached8(unsigned int address)
{
    unsigned char tmp = (*(volatile unsigned char *)(address));
    return tmp;
}

static __inline__ unsigned short grlib_read_uncached16(unsigned int address) {
    unsigned short tmp = (*(volatile unsigned short *)(address));
    return tmp;
}

RTEMS_INLINE_ROUTINE unsigned int grlib_read_uncached32(unsigned int address)
{
    unsigned int tmp = (*(volatile unsigned int *)(address));
    return tmp;
}

#define GRLIB_DMA_IS_CACHE_COHERENT 1

#endif

extern struct ambapp_bus ambapp_plb;

#ifdef __cplusplus
}
#endif

#endif /* GRLIB_IMPL_H */