From 93e9cd8485b31e5a33f1040bff4d15e65c0b2d19 Mon Sep 17 00:00:00 2001 From: Manuel Lauss Date: Wed, 7 Oct 2009 20:15:14 +0200 Subject: [PATCH] MIPS: Alchemy: Simple cpu subtype detector Extract the alchemy chip variant from c0_prid register. Signed-off-by: Manuel Lauss 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 --- arch/mips/include/asm/mach-au1x00/au1000.h | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/arch/mips/include/asm/mach-au1x00/au1000.h b/arch/mips/include/asm/mach-au1x00/au1000.h index fceeca883359..2dc87d3b0428 100644 --- a/arch/mips/include/asm/mach-au1x00/au1000.h +++ b/arch/mips/include/asm/mach-au1x00/au1000.h @@ -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);