/* i960.h
*
* This include file contains information pertaining to the Intel
* i960 processor family.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* 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.
*
* $Id$
*/
#ifndef __i960_h
#define __i960_h
#ifdef __cplusplus
extern "C" {
#endif
/*
* This file contains the information required to build
* RTEMS for a particular member of the Intel i960
* family. It does this by setting variables to indicate
* which implementation dependent features are present
* in a particular member of the family.
*
* NOTE: For now i960 is really the i960ca. eventually need
* to put in at least support for FPU.
*/
#if defined(__i960CA__)
#define CPU_MODEL_NAME "i960ca"
#define I960_HAS_FPU 0
#else
#error "Unsupported CPU Model"
#endif
/*
* Define the name of the CPU family.
*/
#define CPU_NAME "Intel i960"
#ifndef ASM
/*
* XXX should have an ifdef here and have stuff for the other
* XXX family members...
*/
#if defined(__i960CA__)
/* i960CA control structures */
/* Intel i960CA Control Table */
typedef struct {
/* Control Group 0 */
unsigned int ipb0; /* IP breakpoint 0 */
unsigned int ipb1; /* IP breakpoint 1 */
unsigned int dab0; /* data address breakpoint 0 */
unsigned int dab1; /* data address breakpoint 1 */
/* Control Group 1 */
unsigned int imap0; /* interrupt map 0 */
unsigned int imap1; /* interrupt map 1 */
unsigned int imap2; /* interrupt map 2 */
unsigned int icon; /* interrupt control */
/* Control Group 2 */
unsigned int mcon0; /* memory region 0 configuration */
unsigned int mcon1; /* memory region 1 configuration */
unsigned int mcon2; /* memory region 2 configuration */
unsigned int mcon3; /* memory region 3 configuration */
/* Control Group 3 */
unsigned int mcon4; /* memory region 4 configuration */
unsigned int mcon5; /* memory region 5 configuration */
unsigned int mcon6; /* memory region 6 configuration */
unsigned int mcon7; /* memory region 7 configuration */
/* Control Group 4 */
unsigned int mcon8; /* memory region 8 configuration */
unsigned int mcon9; /* memory region 9 configuration */
unsigned int mcon10; /* memory region 10 configuration */
unsigned int mcon11; /* memory region 11 configuration */
/* Control Group 5 */
unsigned int mcon12; /* memory region 12 configuration */
unsigned int mcon13; /* memory region 13 configuration */
unsigned int mcon14; /* memory region 14 configuration */
unsigned int mcon15; /* memory region 15 configuration */
/* Control Group 6 */
unsigned int bpcon; /* breakpoint control */
unsigned int tc; /* trace control */
unsigned int bcon; /* bus configuration control */
unsigned int reserved; /* reserved */
} i960ca_control_table;
/* Intel i960CA Processor Control Block */
typedef struct {
unsigned int *fault_tbl; /* fault table base address */
i960ca_control_table
*control_tbl; /* control table base address */
unsigned int initial_ac; /* AC register initial value */
unsigned int fault_config; /* fault configuration word */
void **intr_tbl; /* interrupt table base address */
void *sys_proc_tbl; /* system procedure table
base address */
unsigned int reserved; /* reserved */
unsigned int *intr_stack; /* interrupt stack pointer */
unsigned int ins_cache_cfg; /* instruction cache
configuration word */
unsigned int reg_cache_cfg; /* register cache configuration word */
} i960ca_PRCB;
#endif
/*
* Interrupt Level Routines
*/
#define i960_disable_interrupts( oldlevel ) \
{ (oldlevel) = 0x1f0000; \
asm volatile ( "modpc 0,%1,%1" \
: "=d" ((oldlevel)) \
: "0" ((oldlevel)) ); \
}
#define i960_enable_interrupts( oldlevel ) \
{ unsigned int _mask = 0x1f0000; \
asm volatile ( "modpc 0,%0,%1" \
: "=d" (_mask), "=d" ((oldlevel)) \
: "0" (_mask), "1" ((oldlevel)) ); \
}
#define i960_flash_interrupts( oldlevel ) \
{ unsigned int _mask = 0x1f0000; \
asm volatile ( "modpc 0,%0,%1 ; \
mov %0,%1 ; \
modpc 0,%0,%1" \
: "=d" (_mask), "=d" ((oldlevel)) \
: "0" (_mask), "1" ((oldlevel)) ); \
}
#define i960_get_interrupt_level( _level ) \
{ \
i960_disable_interrupts( _level ); \
i960_enable_interrupts( _level ); \
(_level) = ((_level) & 0x1f0000) >> 16; \
} while ( 0 )
#define i960_atomic_modify( mask, addr, prev ) \
{ register unsigned int _mask = (mask); \
register unsigned int *_addr = (unsigned int *)(addr); \
asm volatile( "atmod %0,%1,%1" \
: "=d" (_addr), "=d" (_mask) \
: "0" (_addr), "1" (_mask) ); \
(prev) = _mask; \
}
#define atomic_modify( _mask, _address, _previous ) \
i960_atomic_modify( _mask, _address, _previous )
#define i960_enable_tracing() \
{ register unsigned int _pc = 0x1; \
asm volatile( "modpc 0,%0,%0" : "=d" (_pc) : "0" (_pc) ); \
}
#define i960_unmask_intr( xint ) \
{ register unsigned int _mask= (1<<(xint)); \
asm volatile( "or sf1,%0,sf1" : "=d" (_mask) : "0" (_mask) ); \
}
#define i960_mask_intr( xint ) \
{ register unsigned int _mask= (1<<(xint)); \
asm volatile( "andnot %0,sf1,sf1" : "=d" (_mask) : "0" (_mask) ); \
}
#define i960_clear_intr( xint ) \
{ register unsigned int _xint=(xint); \
asm volatile( "loop_til_cleared: clrbit %0,sf0,sf0 ; \
bbs %0,sf0, loop_til_cleared" \
: "=d" (_xint) : "0" (_xint) ); \
}
#define i960_reload_ctl_group( group ) \
{ register int _cmd = ((group)|0x400) ; \
asm volatile( "sysctl %0,%0,%0" : "=d" (_cmd) : "0" (_cmd) ); \
}
#define i960_cause_intr( intr ) \
{ register int _intr = (intr); \
asm volatile( "sysctl %0,%0,%0" : "=d" (_intr) : "0" (_intr) ); \
}
#define i960_soft_reset( prcb ) \
{ register i960ca_PRCB *_prcb = (prcb); \
register unsigned int *_next=0; \
register unsigned int _cmd = 0x30000; \
asm volatile( "lda next,%1; \
sysctl %0,%1,%2; \
next: mov g0,g0" \
: "=d" (_cmd), "=d" (_next), "=d" (_prcb) \
: "0" (_cmd), "1" (_next), "2" (_prcb) ); \
}
static inline unsigned int i960_pend_intrs()
{ register unsigned int _intr=0;
asm volatile( "mov sf0,%0" : "=d" (_intr) : "0" (_intr) );
return ( _intr );
}
static inline unsigned int i960_mask_intrs()
{ register unsigned int _intr=0;
asm volatile( "mov sf1,%0" : "=d" (_intr) : "0" (_intr) );
return( _intr );
}
static inline unsigned int i960_get_fp()
{ register unsigned int _fp=0;
asm volatile( "mov fp,%0" : "=d" (_fp) : "0" (_fp) );
return ( _fp );
}
/*
* The following routine swaps the endian format of an unsigned int.
* It must be static because it is referenced indirectly.
*
* This version is based on code presented in Vol. 4, No. 4 of
* Insight 960. It is certainly something you wouldn't think
* of on your own.
*/
static inline unsigned int CPU_swap_u32(
unsigned int value
)
{
register unsigned int to_swap = value;
register unsigned int temp = 0xFF00FF00;
register unsigned int swapped = 0;
/* to_swap swapped */
asm volatile ( "rotate 16,%0,%2 ;" /* 0x12345678 0x56781234 */
"modify %1,%0,%2 ;" /* 0x12345678 0x12785634 */
"rotate 8,%2,%2" /* 0x12345678 0x78563412 */
: "=r" (to_swap), "=r" (temp), "=r" (swapped)
: "0" (to_swap), "1" (temp), "2" (swapped)
);
return( swapped );
}
#define CPU_swap_u16( value ) \
(((value&0xff) << 8) | ((value >> 8)&0xff))
#ifdef __cplusplus
}
#endif
#endif /* !ASM */
#endif
/* end of include file */
