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authorShinya Kuribayashi <skuribay@pobox.com>2011-05-07 00:18:13 +0900
committerShinya Kuribayashi <skuribay@pobox.com>2011-05-10 00:12:31 +0900
commit68cebb8027c282a949ac0ca7dcb5baabd1c6879a (patch)
tree43082c3da2b94caab4622480520465e0855e65a9 /arch/mips/lib
parent660da0947abff3bc98bb0baa37a6db5050ff46d6 (diff)
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MIPS: Move timer code to arch/mips/cpu/$(CPU)/
Current timer routines (arch/mips/lib/timer.c) are implemented assuming that MIPS32 coprocessor (CP0) resources, Counter and Compare registers in this case, are available. But this doesn't always work. We need to make sure that all MIPS-based systems don't necessarily use CP0 counter/compare registers as time keeping resources. And some MIPS variant processors might come with different hardware specs with genuine MIPS32 CP0 registers. With this change, each $(CPU)/ directory can have its own timer code. Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>
Diffstat (limited to 'arch/mips/lib')
-rw-r--r--arch/mips/lib/Makefile1
-rw-r--r--arch/mips/lib/time.c98
2 files changed, 0 insertions, 99 deletions
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 4e90704..9244f31 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -33,7 +33,6 @@ COBJS-y += bootm_qemu_mips.o
else
COBJS-y += bootm.o
endif
-COBJS-y += time.o
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
diff --git a/arch/mips/lib/time.c b/arch/mips/lib/time.c
deleted file mode 100644
index 0e66441..0000000
--- a/arch/mips/lib/time.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- * (C) Copyright 2003
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that 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
- */
-
-#include <common.h>
-#include <asm/mipsregs.h>
-
-static unsigned long timestamp;
-
-/* how many counter cycles in a jiffy */
-#define CYCLES_PER_JIFFY (CONFIG_SYS_MIPS_TIMER_FREQ + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ
-
-/*
- * timer without interrupts
- */
-
-int timer_init(void)
-{
- /* Set up the timer for the first expiration. */
- timestamp = 0;
- write_c0_compare(read_c0_count() + CYCLES_PER_JIFFY);
-
- return 0;
-}
-
-void reset_timer(void)
-{
- timestamp = 0;
- write_c0_compare(read_c0_count() + CYCLES_PER_JIFFY);
-}
-
-ulong get_timer(ulong base)
-{
- unsigned int count;
- unsigned int expirelo = read_c0_compare();
-
- /* Check to see if we have missed any timestamps. */
- count = read_c0_count();
- while ((count - expirelo) < 0x7fffffff) {
- expirelo += CYCLES_PER_JIFFY;
- timestamp++;
- }
- write_c0_compare(expirelo);
-
- return (timestamp - base);
-}
-
-void set_timer(ulong t)
-{
- timestamp = t;
- write_c0_compare(read_c0_count() + CYCLES_PER_JIFFY);
-}
-
-void __udelay(unsigned long usec)
-{
- unsigned int tmo;
-
- tmo = read_c0_count() + (usec * (CONFIG_SYS_MIPS_TIMER_FREQ / 1000000));
- while ((tmo - read_c0_count()) < 0x7fffffff)
- /*NOP*/;
-}
-
-/*
- * This function is derived from PowerPC code (read timebase as long long).
- * On MIPS it just returns the timer value.
- */
-unsigned long long get_ticks(void)
-{
- return get_timer(0);
-}
-
-/*
- * This function is derived from PowerPC code (timebase clock frequency).
- * On MIPS it returns the number of timer ticks per second.
- */
-ulong get_tbclk(void)
-{
- return CONFIG_SYS_HZ;
-}