diff options
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/Kconfig | 5 | ||||
| -rw-r--r-- | arch/arc/Makefile | 2 | ||||
| -rw-r--r-- | arch/arc/configs/nsim_700_defconfig | 1 | ||||
| -rw-r--r-- | arch/arc/configs/nsimosci_defconfig | 1 | ||||
| -rw-r--r-- | arch/arc/configs/tb10x_defconfig | 1 | ||||
| -rw-r--r-- | arch/arc/kernel/setup.c | 8 | ||||
| -rw-r--r-- | arch/arc/kernel/time.c | 49 |
7 files changed, 4 insertions, 63 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index a35d57a..8e8de4c 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -311,11 +311,6 @@ config ARC_HAS_SWAPE bool "Insn: SWAPE (endian-swap)" default y -config ARC_HAS_RTSC - bool "Insn: RTSC (64-bit r/o cycle counter)" - default y - depends on !SMP - endmenu # "ARC CPU Configuration" config LINUX_LINK_BASE diff --git a/arch/arc/Makefile b/arch/arc/Makefile index 50bc5bc..87e0e5b 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -33,7 +33,7 @@ cflags-$(atleast_gcc44) += -fsection-anchors cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape -cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc + cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables # By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok diff --git a/arch/arc/configs/nsim_700_defconfig b/arch/arc/configs/nsim_700_defconfig index 281baa0..e6aa1ed 100644 --- a/arch/arc/configs/nsim_700_defconfig +++ b/arch/arc/configs/nsim_700_defconfig @@ -23,7 +23,6 @@ CONFIG_MODULES=y # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set CONFIG_ARC_PLAT_FPGA_LEGACY=y -# CONFIG_ARC_HAS_RTSC is not set CONFIG_ARC_BUILTIN_DTB_NAME="angel4" CONFIG_PREEMPT=y # CONFIG_COMPACTION is not set diff --git a/arch/arc/configs/nsimosci_defconfig b/arch/arc/configs/nsimosci_defconfig index 70d0de47..1aad236 100644 --- a/arch/arc/configs/nsimosci_defconfig +++ b/arch/arc/configs/nsimosci_defconfig @@ -24,7 +24,6 @@ CONFIG_MODULES=y # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set CONFIG_ARC_PLAT_FPGA_LEGACY=y -# CONFIG_ARC_HAS_RTSC is not set CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci" # CONFIG_COMPACTION is not set CONFIG_NET=y diff --git a/arch/arc/configs/tb10x_defconfig b/arch/arc/configs/tb10x_defconfig index 2242a06..3b4dc9c 100644 --- a/arch/arc/configs/tb10x_defconfig +++ b/arch/arc/configs/tb10x_defconfig @@ -26,7 +26,6 @@ CONFIG_MODULE_UNLOAD=y # CONFIG_BLOCK is not set CONFIG_ARC_PLAT_TB10X=y CONFIG_ARC_CACHE_LINE_SHIFT=5 -# CONFIG_ARC_HAS_RTSC is not set CONFIG_ARC_STACK_NONEXEC=y CONFIG_HZ=250 CONFIG_ARC_BUILTIN_DTB_NAME="abilis_tb100_dvk" diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index 1d167c6..5086c75 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -180,10 +180,9 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len) (unsigned int)(arc_get_core_freq() / 1000000), (unsigned int)(arc_get_core_freq() / 10000) % 100); - n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s%s%s\nISA Extn\t: ", + n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s\nISA Extn\t: ", IS_AVAIL1(cpu->timers.t0, "Timer0 "), - IS_AVAIL1(cpu->timers.t1, "Timer1 "), - IS_AVAIL2(cpu->timers.rtsc, "64-bit RTSC ", CONFIG_ARC_HAS_RTSC)); + IS_AVAIL1(cpu->timers.t1, "Timer1 ")); n += i = scnprintf(buf + n, len - n, "%s%s", IS_AVAIL2(atomic, "atomic ", CONFIG_ARC_HAS_LLSC)); @@ -254,9 +253,6 @@ static void arc_chk_core_config(void) if (!cpu->timers.t1) panic("Timer1 is not present!\n"); - if (IS_ENABLED(CONFIG_ARC_HAS_RTSC) && !cpu->timers.rtsc) - panic("RTSC is not present\n"); - #ifdef CONFIG_ARC_HAS_DCCM /* * DCCM can be arbit placed in hardware. diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c index dbe74f4..9307f87 100644 --- a/arch/arc/kernel/time.c +++ b/arch/arc/kernel/time.c @@ -26,6 +26,7 @@ * while TIMER1 for free running (clocksource) * * Newer ARC700 cores have 64bit clk fetching RTSC insn, preferred over TIMER1 + * which however is currently broken */ #include <linux/spinlock.h> @@ -59,52 +60,6 @@ /********** Clock Source Device *********/ -#ifdef CONFIG_ARC_HAS_RTSC - -int arc_counter_setup(void) -{ - /* - * For SMP this needs to be 0. However Kconfig glue doesn't - * enable this option for SMP configs - */ - return 1; -} - -static cycle_t arc_counter_read(struct clocksource *cs) -{ - unsigned long flags; - union { -#ifdef CONFIG_CPU_BIG_ENDIAN - struct { u32 high, low; }; -#else - struct { u32 low, high; }; -#endif - cycle_t full; - } stamp; - - flags = arch_local_irq_save(); - - __asm__ __volatile( - " .extCoreRegister tsch, 58, r, cannot_shortcut \n" - " rtsc %0, 0 \n" - " mov %1, 0 \n" - : "=r" (stamp.low), "=r" (stamp.high)); - - arch_local_irq_restore(flags); - - return stamp.full; -} - -static struct clocksource arc_counter = { - .name = "ARC RTSC", - .rating = 300, - .read = arc_counter_read, - .mask = CLOCKSOURCE_MASK(32), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -#else /* !CONFIG_ARC_HAS_RTSC */ - static bool is_usable_as_clocksource(void) { #ifdef CONFIG_SMP @@ -139,8 +94,6 @@ static struct clocksource arc_counter = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; -#endif - /********** Clock Event Device *********/ /* |
