/*
* Support for MicroBlaze PVR ( processor version register )
*
* Copyright ( C ) 2007 - 2009 Michal Simek < monstr @ monstr . eu >
* Copyright ( C ) 2007 - 2009 PetaLogix
* Copyright ( C ) 2007 John Williams < john . williams @ petalogix . com >
*
* This file is subject to the terms and conditions of the GNU General Public
* License . See the file " COPYING " in the main directory of this archive
* for more details .
*/
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <asm /exceptions.h>
#include <asm /pvr.h>
#include <linux/irqflags.h>
/*
* Until we get an assembler that knows about the pvr registers ,
* this horrible cruft will have to do .
* That hardcoded opcode is mfs r3 , rpvrNN
*/
#define get_single_pvr(pvrid, val) \
{ \
register unsigned tmp __asm__("r3" ); \
tmp = 0 x0; /* Prevent warning about unused */ \
__asm__ __volatile__ ( \
"mfs %0, rpvr" #pvrid ";" \
: "=r" (tmp) : : "memory" ); \
val = tmp; \
}
/*
* Does the CPU support the PVR register ?
* return value :
* 0 : no PVR
* 1 : simple PVR
* 2 : full PVR
*
* This must work on all CPU versions , including those before the
* PVR was even an option .
*/
int cpu_has_pvr(void )
{
unsigned long flags;
unsigned pvr0;
local_save_flags(flags);
/* PVR bit in MSR tells us if there is any support */
if (!(flags & PVR_MSR_BIT))
return 0 ;
get_single_pvr(0 , pvr0);
pr_debug("%s: pvr0 is 0x%08x\n" , __func__, pvr0);
if (pvr0 & PVR0_PVR_FULL_MASK)
return 1 ;
/* for partial PVR use static cpuinfo */
return 2 ;
}
void get_pvr(struct pvr_s *p)
{
get_single_pvr(0 , p->pvr[0 ]);
get_single_pvr(1 , p->pvr[1 ]);
get_single_pvr(2 , p->pvr[2 ]);
get_single_pvr(3 , p->pvr[3 ]);
get_single_pvr(4 , p->pvr[4 ]);
get_single_pvr(5 , p->pvr[5 ]);
get_single_pvr(6 , p->pvr[6 ]);
get_single_pvr(7 , p->pvr[7 ]);
get_single_pvr(8 , p->pvr[8 ]);
get_single_pvr(9 , p->pvr[9 ]);
get_single_pvr(10 , p->pvr[10 ]);
get_single_pvr(11 , p->pvr[11 ]);
}
Messung V0.5 in Prozent C=93 H=75 G=84
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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