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MIPS: Alchemy: Simple cpu subtype detector

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Extract the alchemy chip variant from c0_prid register.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/14/
Patchwork: http://patchwork.linux-mips.org/patch/707/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Manuel Lauss 2009-10-07 20:15:14 +02:00 committed by Ralf Baechle
parent 0a0b1295ef
commit 93e9cd8485
1 changed files with 31 additions and 0 deletions
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31
arch/mips/include/asm/mach-au1x00/au1000.h
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@ -130,6 +130,37 @@ static inline int au1xxx_cpu_needs_config_od(void)
return 0;
}
#define ALCHEMY_CPU_UNKNOWN -1
#define ALCHEMY_CPU_AU1000 0
#define ALCHEMY_CPU_AU1500 1
#define ALCHEMY_CPU_AU1100 2
#define ALCHEMY_CPU_AU1550 3
#define ALCHEMY_CPU_AU1200 4
static inline int alchemy_get_cputype(void)
{
switch (read_c0_prid() & 0xffff0000) {
case 0x00030000:
return ALCHEMY_CPU_AU1000;
break;
case 0x01030000:
return ALCHEMY_CPU_AU1500;
break;
case 0x02030000:
return ALCHEMY_CPU_AU1100;
break;
case 0x03030000:
return ALCHEMY_CPU_AU1550;
break;
case 0x04030000:
case 0x05030000:
return ALCHEMY_CPU_AU1200;
break;
}
return ALCHEMY_CPU_UNKNOWN;
}
/* arch/mips/au1000/common/clocks.c */
extern void set_au1x00_speed(unsigned int new_freq);
extern unsigned int get_au1x00_speed(void);