diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2010-08-05 13:25:50 +0100 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2010-08-05 13:25:50 +0100 |
commit | 9ebc2935f346964c34e5f376263c4071f66edcd9 (patch) | |
tree | af2be831c66a5b23f5d184a87e9687f0bcafa9c0 /arch/mips/wrppmc/time.c | |
parent | 91598965ecb508dc7bc154ec9d3e35dcadb3fa5f (diff) |
MIPS: WRPPMC: Move code one directory level up.
It was the last platform under gt64120 and will fit better into the new
platform makefile scheme, if moved.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/wrppmc/time.c')
-rw-r--r-- | arch/mips/wrppmc/time.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/mips/wrppmc/time.c b/arch/mips/wrppmc/time.c new file mode 100644 index 00000000000..668dbd5f12c --- /dev/null +++ b/arch/mips/wrppmc/time.c @@ -0,0 +1,39 @@ +/* + * time.c: MIPS CPU Count/Compare timer hookup + * + * Author: Mark.Zhan, <rongkai.zhan@windriver.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. + * + * Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org) + * Copyright (C) 2006, Wind River System Inc. + */ +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> + +#include <asm/gt64120.h> +#include <asm/time.h> + +#define WRPPMC_CPU_CLK_FREQ 40000000 /* 40MHZ */ + +/* + * Estimate CPU frequency. Sets mips_hpt_frequency as a side-effect + * + * NOTE: We disable all GT64120 timers, and use MIPS processor internal + * timer as the source of kernel clock tick. + */ +void __init plat_time_init(void) +{ + /* Disable GT64120 timers */ + GT_WRITE(GT_TC_CONTROL_OFS, 0x00); + GT_WRITE(GT_TC0_OFS, 0x00); + GT_WRITE(GT_TC1_OFS, 0x00); + GT_WRITE(GT_TC2_OFS, 0x00); + GT_WRITE(GT_TC3_OFS, 0x00); + + /* Use MIPS compare/count internal timer */ + mips_hpt_frequency = WRPPMC_CPU_CLK_FREQ; +} |