diff options
| author | Eswar Nallusamy <contacteswar@gmail.com> | 2005-11-02 17:32:49 +0000 |
|---|---|---|
| committer | Eswar Nallusamy <contacteswar@gmail.com> | 2005-11-02 17:32:49 +0000 |
| commit | ed009371030cb97571c8b8dc342f16a9fa124d59 (patch) | |
| tree | 3ff2d9e14f73cbb98b5706e837adb897eb5d3c3e /src/cpu/ppc/ppc970/clock.c | |
| parent | 987ca8e08c3307e46dde3b35c6190c504f0cbf19 (diff) | |
ppc970 initial porting.
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2082 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu/ppc/ppc970/clock.c')
| -rw-r--r-- | src/cpu/ppc/ppc970/clock.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/cpu/ppc/ppc970/clock.c b/src/cpu/ppc/ppc970/clock.c new file mode 100644 index 0000000000..bb600c6d5b --- /dev/null +++ b/src/cpu/ppc/ppc970/clock.c @@ -0,0 +1,27 @@ +#include <ppc.h> + +static int PLL_multiplier[] = { + 25, /* 0000 - 2.5x */ + 75, /* 0001 - 7.5x */ + 70, /* 0010 - 7x */ + 10, /* 0011 - bypass */ + 20, /* 0100 - 2x */ + 65, /* 0101 - 6.5x */ + 100, /* 0110 - 10x */ + 45, /* 0111 - 4.5x */ + 30, /* 1000 - 3x */ + 55, /* 1001 - 5.5x */ + 40, /* 1010 - 4x */ + 50, /* 1011 - 5x */ + 80, /* 1100 - 8x */ + 60, /* 1101 - 6x */ + 35, /* 1110 - 3.5x */ + 0, /* 1111 - off */ +}; + +unsigned long +get_timer_freq(void) +{ + unsigned long clock = CONFIG_SYS_CLK_FREQ * 1000000; + return clock * PLL_multiplier[ppc_gethid1() >> 28] / 10; +} |