diff options
| author | Manuel Lauss <manuel.lauss@googlemail.com> | 2009-10-07 20:15:14 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-02-27 12:52:52 +0100 |
| commit | 93e9cd8485b31e5a33f1040bff4d15e65c0b2d19 (patch) | |
| tree | a642c7fc09e3a7e3f8f71bb7f16018f807a6864e /arch | |
| parent | MIPS: Alchemy: higher priority for system timer. (diff) | |
| download | linux-93e9cd8485b31e5a33f1040bff4d15e65c0b2d19.tar.xz linux-93e9cd8485b31e5a33f1040bff4d15e65c0b2d19.zip | |
MIPS: Alchemy: Simple cpu subtype detector
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/include/asm/mach-au1x00/au1000.h | 31 |
1 files changed, 31 insertions, 0 deletions
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); |