diff options
Diffstat (limited to 'target/linux/rb532/files/arch/mips/rb500/time.c')
| -rw-r--r-- | target/linux/rb532/files/arch/mips/rb500/time.c | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/target/linux/rb532/files/arch/mips/rb500/time.c b/target/linux/rb532/files/arch/mips/rb500/time.c deleted file mode 100644 index 13320a6caf..0000000000 --- a/target/linux/rb532/files/arch/mips/rb500/time.c +++ /dev/null @@ -1,94 +0,0 @@ -/* -**************************************************************************** -* Carsten Langgaard, carstenl@mips.com -* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. -* -*************************************************************************** -* -* This program is free software; you can distribute it and/or modify it -* under the terms of the GNU General Public License (Version 2) as -* published by the Free Software Foundation. -* -* This program is distributed in the hope it will be useful, but WITHOUT -* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or -* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -* for more details. -* -* You should have received a copy of the GNU General Public License along -* with this program; if not, write to the Free Software Foundation, Inc., -* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. -* -**************************************************************************** -* -* Setting up the clock on the MIPS boards. -* -**************************************************************************** -* P. Sadik Oct 10, 2003 -* -* Started change log. -* mips_counter_frequency is now calculated at run time, based on idt_cpu_freq. -* Code cleanup -**************************************************************************** -*/ - -#include <linux/autoconf.h> -#include <linux/init.h> -#include <linux/kernel_stat.h> -#include <linux/sched.h> -#include <linux/spinlock.h> -#include <linux/mc146818rtc.h> -#include <linux/irq.h> -#include <linux/timex.h> - -#include <asm/irq_cpu.h> -#include <asm/mipsregs.h> -#include <asm/ptrace.h> -#include <asm/debug.h> -#include <asm/rc32434/rc32434.h> - -static unsigned long r4k_offset; /* Amount to incr compare reg each time */ -static unsigned long r4k_cur; /* What counter should be at next timer irq */ -extern unsigned int mips_hpt_frequency; -extern unsigned int idt_cpu_freq; - -/* - * Figure out the r4k offset, the amount to increment the compare - * register for each time tick. There is no RTC available. - * - * The RC32434 counts at half the CPU *core* speed. - */ -static unsigned long __init cal_r4koff(void) -{ - mips_hpt_frequency = idt_cpu_freq * IDT_CLOCK_MULT / 2; - return (mips_hpt_frequency / HZ); -} - - -void __init rc32434_time_init(void) -{ - unsigned int est_freq, flags; - - local_irq_save(flags); - - printk("calculating r4koff... "); - r4k_offset = cal_r4koff(); - printk("%08lx(%d)\n", r4k_offset, (int) r4k_offset); - - est_freq = 2*r4k_offset*HZ; - est_freq += 5000; /* round */ - est_freq -= est_freq%10000; - printk("CPU frequency %d.%02d MHz\n", est_freq/1000000, - (est_freq%1000000)*100/1000000); - local_irq_restore(flags); -} - -void __init plat_timer_setup(struct irqaction *irq) -{ - /* we are using the cpu counter for timer interrupts */ - setup_irq(MIPS_CPU_TIMER_IRQ, irq); - - /* to generate the first timer interrupt */ - r4k_cur = (read_c0_count() + r4k_offset); - write_c0_compare(r4k_cur); -} - |