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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-15 14:15:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-15 14:15:17 -0800
commitd25b6af91ec600faaff3a7e863f19d3e16593e52 (patch)
tree30aaf6a1fa9b767779afd478189d5be58a0a2f4c /arch
parent179a7ba6806805bd4cd7a5e4574b83353c5615ad (diff)
parent7badf6fefca8278e749e82411fdb98b123cca50e (diff)
Merge tag 'arc-4.10-rc1-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC updates from Vineet Gupta: "These are mostly timer/clocksource driver updates which were Reviewed/Acked by Daniel but had to be merged via ARC tree due to dependencies. I will follow up with another pull request with actual ARC changes early next week ! Summary: - Moving ARC timer driver into drivers/clocksource - EZChip timer driver updates [Noam] - ARC AXS103 and HAPS platform updates [Alexey]" * tag 'arc-4.10-rc1-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: axs10x: really enable ARC PGU ARC: rename Zebu platform support to HAPS clocksource: nps: avoid maybe-uninitialized warning clocksource: Add clockevent support to NPS400 driver clocksource: update "fn" at CLOCKSOURCE_OF_DECLARE() of nps400 timer soc: Support for NPS HW scheduling clocksource: import ARC timer driver ARC: breakout timer include code into separate header ... ARC: move mcip.h into include/soc and adjust the includes ARC: breakout aux handling into a separate header ARC: time: move time_init() out of the driver ARC: timer: gfrc, rtc: build under same option (64-bit timers) ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists ... ARC: timer: gfrc, rtc: deuglify big endian code
Diffstat (limited to 'arch')
-rw-r--r--arch/arc/Kconfig13
-rw-r--r--arch/arc/boot/dts/axs101.dts2
-rw-r--r--arch/arc/boot/dts/axs103_idu.dts2
-rw-r--r--arch/arc/boot/dts/haps_hs.dts (renamed from arch/arc/boot/dts/zebu_hs.dts)0
-rw-r--r--arch/arc/boot/dts/haps_hs_idu.dts (renamed from arch/arc/boot/dts/zebu_hs_idu.dts)0
-rw-r--r--arch/arc/configs/axs101_defconfig4
-rw-r--r--arch/arc/configs/axs103_smp_defconfig4
-rw-r--r--arch/arc/configs/haps_hs_defconfig (renamed from arch/arc/configs/zebu_hs_defconfig)2
-rw-r--r--arch/arc/configs/haps_hs_smp_defconfig (renamed from arch/arc/configs/zebu_hs_smp_defconfig)2
-rw-r--r--arch/arc/configs/nsimosci_hs_smp_defconfig2
-rw-r--r--arch/arc/configs/vdk_hs38_smp_defconfig2
-rw-r--r--arch/arc/include/asm/arcregs.h94
-rw-r--r--arch/arc/include/asm/mcip.h107
-rw-r--r--arch/arc/kernel/Makefile2
-rw-r--r--arch/arc/kernel/mcip.c2
-rw-r--r--arch/arc/kernel/setup.c17
-rw-r--r--arch/arc/kernel/time.c382
-rw-r--r--arch/arc/plat-axs10x/axs10x.c2
-rw-r--r--arch/arc/plat-eznps/include/plat/ctop.h2
19 files changed, 33 insertions, 608 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index bd204bfa29ed..ab12723d39a0 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -8,9 +8,9 @@
config ARC
def_bool y
+ select ARC_TIMERS
select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
select BUILDTIME_EXTABLE_SORT
- select CLKSRC_OF
select CLONE_BACKWARDS
select COMMON_CLK
select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
@@ -115,6 +115,7 @@ config ISA_ARCOMPACT
config ISA_ARCV2
bool "ARC ISA v2"
+ select ARC_TIMERS_64BIT
help
ISA for the Next Generation ARC-HS cores
@@ -410,16 +411,6 @@ config ARC_HAS_DIV_REM
bool "Insn: div, divu, rem, remu"
default y
-config ARC_HAS_RTC
- bool "Local 64-bit r/o cycle counter"
- default n
- depends on !SMP
-
-config ARC_HAS_GFRC
- bool "SMP synchronized 64-bit cycle counter"
- default y
- depends on SMP
-
config ARC_NUMBER_OF_INTERRUPTS
int "Number of interrupts"
range 8 240
diff --git a/arch/arc/boot/dts/axs101.dts b/arch/arc/boot/dts/axs101.dts
index d9b9b9dcfc4c..70aec7d6ca60 100644
--- a/arch/arc/boot/dts/axs101.dts
+++ b/arch/arc/boot/dts/axs101.dts
@@ -17,6 +17,6 @@
compatible = "snps,axs101", "snps,arc-sdp";
chosen {
- bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0";
+ bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0 video=1280x720@60";
};
};
diff --git a/arch/arc/boot/dts/axs103_idu.dts b/arch/arc/boot/dts/axs103_idu.dts
index 070c29782216..5c843d9b4ac8 100644
--- a/arch/arc/boot/dts/axs103_idu.dts
+++ b/arch/arc/boot/dts/axs103_idu.dts
@@ -20,6 +20,6 @@
compatible = "snps,axs103", "snps,arc-sdp";
chosen {
- bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=ttyS3,115200n8 debug print-fatal-signals=1";
+ bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 print-fatal-signals=1 consoleblank=0 video=1280x720@60";
};
};
diff --git a/arch/arc/boot/dts/zebu_hs.dts b/arch/arc/boot/dts/haps_hs.dts
index 1c1324e84965..1c1324e84965 100644
--- a/arch/arc/boot/dts/zebu_hs.dts
+++ b/arch/arc/boot/dts/haps_hs.dts
diff --git a/arch/arc/boot/dts/zebu_hs_idu.dts b/arch/arc/boot/dts/haps_hs_idu.dts
index 65204b4c0f13..65204b4c0f13 100644
--- a/arch/arc/boot/dts/zebu_hs_idu.dts
+++ b/arch/arc/boot/dts/haps_hs_idu.dts
diff --git a/arch/arc/configs/axs101_defconfig b/arch/arc/configs/axs101_defconfig
index 0a0eaf09aac7..6980b966a364 100644
--- a/arch/arc/configs/axs101_defconfig
+++ b/arch/arc/configs/axs101_defconfig
@@ -75,9 +75,11 @@ CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_DESIGNWARE_PLATFORM=y
# CONFIG_HWMON is not set
+CONFIG_DRM=m
+CONFIG_DRM_I2C_ADV7511=m
+CONFIG_DRM_ARCPGU=m
CONFIG_FB=y
CONFIG_FRAMEBUFFER_CONSOLE=y
-CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
diff --git a/arch/arc/configs/axs103_smp_defconfig b/arch/arc/configs/axs103_smp_defconfig
index 110874705085..30a3d4cf53d2 100644
--- a/arch/arc/configs/axs103_smp_defconfig
+++ b/arch/arc/configs/axs103_smp_defconfig
@@ -77,9 +77,11 @@ CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_DESIGNWARE_PLATFORM=y
# CONFIG_HWMON is not set
+CONFIG_DRM=m
+CONFIG_DRM_I2C_ADV7511=m
+CONFIG_DRM_ARCPGU=m
CONFIG_FB=y
CONFIG_FRAMEBUFFER_CONSOLE=y
-CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
diff --git a/arch/arc/configs/zebu_hs_defconfig b/arch/arc/configs/haps_hs_defconfig
index 9f6166be7145..57b3e599322f 100644
--- a/arch/arc/configs/zebu_hs_defconfig
+++ b/arch/arc/configs/haps_hs_defconfig
@@ -23,7 +23,7 @@ CONFIG_MODULES=y
# CONFIG_IOSCHED_CFQ is not set
CONFIG_ARC_PLAT_SIM=y
CONFIG_ISA_ARCV2=y
-CONFIG_ARC_BUILTIN_DTB_NAME="zebu_hs"
+CONFIG_ARC_BUILTIN_DTB_NAME="haps_hs"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
CONFIG_NET=y
diff --git a/arch/arc/configs/zebu_hs_smp_defconfig b/arch/arc/configs/haps_hs_smp_defconfig
index 44e9693f4257..f85985adebb2 100644
--- a/arch/arc/configs/zebu_hs_smp_defconfig
+++ b/arch/arc/configs/haps_hs_smp_defconfig
@@ -26,7 +26,7 @@ CONFIG_MODULES=y
CONFIG_ARC_PLAT_SIM=y
CONFIG_ISA_ARCV2=y
CONFIG_SMP=y
-CONFIG_ARC_BUILTIN_DTB_NAME="zebu_hs_idu"
+CONFIG_ARC_BUILTIN_DTB_NAME="haps_hs_idu"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
CONFIG_NET=y
diff --git a/arch/arc/configs/nsimosci_hs_smp_defconfig b/arch/arc/configs/nsimosci_hs_smp_defconfig
index 6da71ba253a9..155add7761ed 100644
--- a/arch/arc/configs/nsimosci_hs_smp_defconfig
+++ b/arch/arc/configs/nsimosci_hs_smp_defconfig
@@ -21,7 +21,7 @@ CONFIG_MODULES=y
CONFIG_ARC_PLAT_SIM=y
CONFIG_ISA_ARCV2=y
CONFIG_SMP=y
-# CONFIG_ARC_HAS_GFRC is not set
+# CONFIG_ARC_TIMERS_64BIT is not set
CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci_hs_idu"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
diff --git a/arch/arc/configs/vdk_hs38_smp_defconfig b/arch/arc/configs/vdk_hs38_smp_defconfig
index 969b206d6c67..573028f19de7 100644
--- a/arch/arc/configs/vdk_hs38_smp_defconfig
+++ b/arch/arc/configs/vdk_hs38_smp_defconfig
@@ -15,7 +15,7 @@ CONFIG_ARC_PLAT_AXS10X=y
CONFIG_AXS103=y
CONFIG_ISA_ARCV2=y
CONFIG_SMP=y
-# CONFIG_ARC_HAS_GFRC is not set
+# CONFIG_ARC_TIMERS_64BIT is not set
CONFIG_ARC_UBOOT_SUPPORT=y
CONFIG_ARC_BUILTIN_DTB_NAME="vdk_hs38_smp"
CONFIG_PREEMPT=y
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index 1bd24ec3e350..da41a54ea2d7 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -20,7 +20,6 @@
#define ARC_REG_FP_V2_BCR 0xc8 /* ARCv2 FPU */
#define ARC_REG_SLC_BCR 0xce
#define ARC_REG_DCCM_BUILD 0x74 /* DCCM size (common) */
-#define ARC_REG_TIMERS_BCR 0x75
#define ARC_REG_AP_BCR 0x76
#define ARC_REG_ICCM_BUILD 0x78 /* ICCM size (common) */
#define ARC_REG_XY_MEM_BCR 0x79
@@ -112,90 +111,7 @@
#ifndef __ASSEMBLY__
-/*
- ******************************************************************
- * Inline ASM macros to read/write AUX Regs
- * Essentially invocation of lr/sr insns from "C"
- */
-
-#if 1
-
-#define read_aux_reg(reg) __builtin_arc_lr(reg)
-
-/* gcc builtin sr needs reg param to be long immediate */
-#define write_aux_reg(reg_immed, val) \
- __builtin_arc_sr((unsigned int)(val), reg_immed)
-
-#else
-
-#define read_aux_reg(reg) \
-({ \
- unsigned int __ret; \
- __asm__ __volatile__( \
- " lr %0, [%1]" \
- : "=r"(__ret) \
- : "i"(reg)); \
- __ret; \
-})
-
-/*
- * Aux Reg address is specified as long immediate by caller
- * e.g.
- * write_aux_reg(0x69, some_val);
- * This generates tightest code.
- */
-#define write_aux_reg(reg_imm, val) \
-({ \
- __asm__ __volatile__( \
- " sr %0, [%1] \n" \
- : \
- : "ir"(val), "i"(reg_imm)); \
-})
-
-/*
- * Aux Reg address is specified in a variable
- * * e.g.
- * reg_num = 0x69
- * write_aux_reg2(reg_num, some_val);
- * This has to generate glue code to load the reg num from
- * memory to a reg hence not recommended.
- */
-#define write_aux_reg2(reg_in_var, val) \
-({ \
- unsigned int tmp; \
- \
- __asm__ __volatile__( \
- " ld %0, [%2] \n\t" \
- " sr %1, [%0] \n\t" \
- : "=&r"(tmp) \
- : "r"(val), "memory"(&reg_in_var)); \
-})
-
-#endif
-
-#define READ_BCR(reg, into) \
-{ \
- unsigned int tmp; \
- tmp = read_aux_reg(reg); \
- if (sizeof(tmp) == sizeof(into)) { \
- into = *((typeof(into) *)&tmp); \
- } else { \
- extern void bogus_undefined(void); \
- bogus_undefined(); \
- } \
-}
-
-#define WRITE_AUX(reg, into) \
-{ \
- unsigned int tmp; \
- if (sizeof(tmp) == sizeof(into)) { \
- tmp = (*(unsigned int *)&(into)); \
- write_aux_reg(reg, tmp); \
- } else { \
- extern void bogus_undefined(void); \
- bogus_undefined(); \
- } \
-}
+#include <soc/arc/aux.h>
/* Helpers */
#define TO_KB(bytes) ((bytes) >> 10)
@@ -291,13 +207,7 @@ struct bcr_fp_arcv2 {
#endif
};
-struct bcr_timer {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- unsigned int pad2:15, rtsc:1, pad1:5, rtc:1, t1:1, t0:1, ver:8;
-#else
- unsigned int ver:8, t0:1, t1:1, rtc:1, pad1:5, rtsc:1, pad2:15;
-#endif
-};
+#include <soc/arc/timers.h>
struct bcr_bpu_arcompact {
#ifdef CONFIG_CPU_BIG_ENDIAN
diff --git a/arch/arc/include/asm/mcip.h b/arch/arc/include/asm/mcip.h
deleted file mode 100644
index c8fbe4114bad..000000000000
--- a/arch/arc/include/asm/mcip.h
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- * ARConnect IP Support (Multi core enabler: Cross core IPI, RTC ...)
- *
- * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __ASM_MCIP_H
-#define __ASM_MCIP_H
-
-#ifdef CONFIG_ISA_ARCV2
-
-#include <asm/arcregs.h>
-
-#define ARC_REG_MCIP_BCR 0x0d0
-#define ARC_REG_MCIP_CMD 0x600
-#define ARC_REG_MCIP_WDATA 0x601
-#define ARC_REG_MCIP_READBACK 0x602
-
-struct mcip_cmd {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- unsigned int pad:8, param:16, cmd:8;
-#else
- unsigned int cmd:8, param:16, pad:8;
-#endif
-
-#define CMD_INTRPT_GENERATE_IRQ 0x01
-#define CMD_INTRPT_GENERATE_ACK 0x02
-#define CMD_INTRPT_READ_STATUS 0x03
-#define CMD_INTRPT_CHECK_SOURCE 0x04
-
-/* Semaphore Commands */
-#define CMD_SEMA_CLAIM_AND_READ 0x11
-#define CMD_SEMA_RELEASE 0x12
-
-#define CMD_DEBUG_SET_MASK 0x34
-#define CMD_DEBUG_SET_SELECT 0x36
-
-#define CMD_GFRC_READ_LO 0x42
-#define CMD_GFRC_READ_HI 0x43
-
-#define CMD_IDU_ENABLE 0x71
-#define CMD_IDU_DISABLE 0x72
-#define CMD_IDU_SET_MODE 0x74
-#define CMD_IDU_SET_DEST 0x76
-#define CMD_IDU_SET_MASK 0x7C
-
-#define IDU_M_TRIG_LEVEL 0x0
-#define IDU_M_TRIG_EDGE 0x1
-
-#define IDU_M_DISTRI_RR 0x0
-#define IDU_M_DISTRI_DEST 0x2
-};
-
-struct mcip_bcr {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- unsigned int pad3:8,
- idu:1, llm:1, num_cores:6,
- iocoh:1, gfrc:1, dbg:1, pad2:1,
- msg:1, sem:1, ipi:1, pad:1,
- ver:8;
-#else
- unsigned int ver:8,
- pad:1, ipi:1, sem:1, msg:1,
- pad2:1, dbg:1, gfrc:1, iocoh:1,
- num_cores:6, llm:1, idu:1,
- pad3:8;
-#endif
-};
-
-/*
- * MCIP programming model
- *
- * - Simple commands write {cmd:8,param:16} to MCIP_CMD aux reg
- * (param could be irq, common_irq, core_id ...)
- * - More involved commands setup MCIP_WDATA with cmd specific data
- * before invoking the simple command
- */
-static inline void __mcip_cmd(unsigned int cmd, unsigned int param)
-{
- struct mcip_cmd buf;
-
- buf.pad = 0;
- buf.cmd = cmd;
- buf.param = param;
-
- WRITE_AUX(ARC_REG_MCIP_CMD, buf);
-}
-
-/*
- * Setup additional data for a cmd
- * Callers need to lock to ensure atomicity
- */
-static inline void __mcip_cmd_data(unsigned int cmd, unsigned int param,
- unsigned int data)
-{
- write_aux_reg(ARC_REG_MCIP_WDATA, data);
-
- __mcip_cmd(cmd, param);
-}
-
-#endif
-
-#endif
diff --git a/arch/arc/kernel/Makefile b/arch/arc/kernel/Makefile
index cfcdedf52ff8..8942c5c3b4c5 100644
--- a/arch/arc/kernel/Makefile
+++ b/arch/arc/kernel/Makefile
@@ -8,7 +8,7 @@
# Pass UTS_MACHINE for user_regset definition
CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
-obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o process.o devtree.o
+obj-y := arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o
obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o
obj-$(CONFIG_ISA_ARCOMPACT) += entry-compact.o intc-compact.o
obj-$(CONFIG_ISA_ARCV2) += entry-arcv2.o intc-arcv2.o
diff --git a/arch/arc/kernel/mcip.c b/arch/arc/kernel/mcip.c
index f39142acc89e..560c4afc2af4 100644
--- a/arch/arc/kernel/mcip.c
+++ b/arch/arc/kernel/mcip.c
@@ -11,8 +11,8 @@
#include <linux/smp.h>
#include <linux/irq.h>
#include <linux/spinlock.h>
+#include <soc/arc/mcip.h>
#include <asm/irqflags-arcv2.h>
-#include <asm/mcip.h>
#include <asm/setup.h>
static DEFINE_RAW_SPINLOCK(mcip_lock);
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 0385df77a697..3093fa898a23 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -10,6 +10,8 @@
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/root_dev.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
#include <linux/console.h>
#include <linux/module.h>
#include <linux/cpu.h>
@@ -234,11 +236,11 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
is_isa_arcompact() ? "ARCompact" : "ARCv2",
IS_AVAIL1(cpu->isa.be, "[Big-Endian]"));
- 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%s%s%s%s\nISA Extn\t: ",
IS_AVAIL1(cpu->extn.timer0, "Timer0 "),
IS_AVAIL1(cpu->extn.timer1, "Timer1 "),
- IS_AVAIL2(cpu->extn.rtc, "Local-64-bit-Ctr ",
- CONFIG_ARC_HAS_RTC));
+ IS_AVAIL2(cpu->extn.rtc, "RTC [UP 64-bit] ", CONFIG_ARC_TIMERS_64BIT),
+ IS_AVAIL2(cpu->extn.gfrc, "GFRC [SMP 64-bit] ", CONFIG_ARC_TIMERS_64BIT));
n += i = scnprintf(buf + n, len - n, "%s%s%s%s%s",
IS_AVAIL2(cpu->isa.atomic, "atomic ", CONFIG_ARC_HAS_LLSC),
@@ -449,6 +451,15 @@ void __init setup_arch(char **cmdline_p)
arc_unwind_init();
}
+/*
+ * Called from start_kernel() - boot CPU only
+ */
+void __init time_init(void)
+{
+ of_clk_init(NULL);
+ clocksource_probe();
+}
+
static int __init customize_machine(void)
{
if (machine_desc->init_machine)
diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
deleted file mode 100644
index c10390d1ddb6..000000000000
--- a/arch/arc/kernel/time.c
+++ /dev/null
@@ -1,382 +0,0 @@
-/*
- * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * vineetg: Jan 1011
- * -sched_clock( ) no longer jiffies based. Uses the same clocksource
- * as gtod
- *
- * Rajeshwarr/Vineetg: Mar 2008
- * -Implemented CONFIG_GENERIC_TIME (rather deleted arch specific code)
- * for arch independent gettimeofday()
- * -Implemented CONFIG_GENERIC_CLOCKEVENTS as base for hrtimers
- *
- * Vineetg: Mar 2008: Forked off from time.c which now is time-jiff.c
- */
-
-/* ARC700 has two 32bit independent prog Timers: TIMER0 and TIMER1
- * Each can programmed to go from @count to @limit and optionally
- * interrupt when that happens.
- * A write to Control Register clears the Interrupt
- *
- * We've designated TIMER0 for events (clockevents)
- * 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/interrupt.h>
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
-#include <linux/cpu.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <asm/irq.h>
-#include <asm/arcregs.h>
-
-#include <asm/mcip.h>
-
-/* Timer related Aux registers */
-#define ARC_REG_TIMER0_LIMIT 0x23 /* timer 0 limit */
-#define ARC_REG_TIMER0_CTRL 0x22 /* timer 0 control */
-#define ARC_REG_TIMER0_CNT 0x21 /* timer 0 count */
-#define ARC_REG_TIMER1_LIMIT 0x102 /* timer 1 limit */
-#define ARC_REG_TIMER1_CTRL 0x101 /* timer 1 control */
-#define ARC_REG_TIMER1_CNT 0x100 /* timer 1 count */
-
-#define TIMER_CTRL_IE (1 << 0) /* Interrupt when Count reaches limit */
-#define TIMER_CTRL_NH (1 << 1) /* Count only when CPU NOT halted */
-
-#define ARC_TIMER_MAX 0xFFFFFFFF
-
-static unsigned long arc_timer_freq;
-
-static int noinline arc_get_timer_clk(struct device_node *node)
-{
- struct clk *clk;
- int ret;
-
- clk = of_clk_get(node, 0);
- if (IS_ERR(clk)) {
- pr_err("timer missing clk");
- return PTR_ERR(clk);
- }
-
- ret = clk_prepare_enable(clk);
- if (ret) {
- pr_err("Couldn't enable parent clk\n");
- return ret;
- }
-
- arc_timer_freq = clk_get_rate(clk);
-
- return 0;
-}
-
-/********** Clock Source Device *********/
-
-#ifdef CONFIG_ARC_HAS_GFRC
-
-static cycle_t arc_read_gfrc(struct clocksource *cs)
-{
- unsigned long flags;
- union {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- struct { u32 h, l; };
-#else
- struct { u32 l, h; };
-#endif
- cycle_t full;
- } stamp;
-
- local_irq_save(flags);
-
- __mcip_cmd(CMD_GFRC_READ_LO, 0);
- stamp.l = read_aux_reg(ARC_REG_MCIP_READBACK);
-
- __mcip_cmd(CMD_GFRC_READ_HI, 0);
- stamp.h = read_aux_reg(ARC_REG_MCIP_READBACK);
-
- local_irq_restore(flags);
-
- return stamp.full;
-}
-
-static struct clocksource arc_counter_gfrc = {
- .name = "ARConnect GFRC",
- .rating = 400,
- .read = arc_read_gfrc,
- .mask = CLOCKSOURCE_MASK(64),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static int __init arc_cs_setup_gfrc(struct device_node *node)
-{
- int exists = cpuinfo_arc700[0].extn.gfrc;
- int ret;
-
- if (WARN(!exists, "Global-64-bit-Ctr clocksource not detected"))
- return -ENXIO;
-
- ret = arc_get_timer_clk(node);
- if (ret)
- return ret;
-
- return clocksource_register_hz(&arc_counter_gfrc, arc_timer_freq);
-}
-CLOCKSOURCE_OF_DECLARE(arc_gfrc, "snps,archs-timer-gfrc", arc_cs_setup_gfrc);
-
-#endif
-
-#ifdef CONFIG_ARC_HAS_RTC
-
-#define AUX_RTC_CTRL 0x103
-#define AUX_RTC_LOW 0x104
-#define AUX_RTC_HIGH 0x105
-
-static cycle_t arc_read_rtc(struct clocksource *cs)
-{
- unsigned long status;
- union {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- struct { u32 high, low; };
-#else
- struct { u32 low, high; };
-#endif
- cycle_t full;
- } stamp;
-
- /*
- * hardware has an internal state machine which tracks readout of
- * low/high and updates the CTRL.status if
- * - interrupt/exception taken between the two reads
- * - high increments after low has been read
- */
- do {
- stamp.low = read_aux_reg(AUX_RTC_LOW);
- stamp.high = read_aux_reg(AUX_RTC_HIGH);
- status = read_aux_reg(AUX_RTC_CTRL);
- } while (!(status & _BITUL(31)));
-
- return stamp.full;
-}
-
-static struct clocksource arc_counter_rtc = {
- .name = "ARCv2 RTC",
- .rating = 350,
- .read = arc_read_rtc,
- .mask = CLOCKSOURCE_MASK(64),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static int __init arc_cs_setup_rtc(struct device_node *node)
-{
- int exists = cpuinfo_arc700[smp_processor_id()].extn.rtc;
- int ret;
-
- if (WARN(!exists, "Local-64-bit-Ctr clocksource not detected"))
- return -ENXIO;
-
- /* Local to CPU hence not usable in SMP */
- if (WARN(IS_ENABLED(CONFIG_SMP), "Local-64-bit-Ctr not usable in SMP"))
- return -EINVAL;
-
- ret = arc_get_timer_clk(node);
- if (ret)
- return ret;
-
- write_aux_reg(AUX_RTC_CTRL, 1);
-
- return clocksource_register_hz(&arc_counter_rtc, arc_timer_freq);
-}
-CLOCKSOURCE_OF_DECLARE(arc_rtc, "snps,archs-timer-rtc", arc_cs_setup_rtc);
-
-#endif
-
-/*
- * 32bit TIMER1 to keep counting monotonically and wraparound
- */
-
-static cycle_t arc_read_timer1(struct clocksource *cs)
-{
- return (cycle_t) read_aux_reg(ARC_REG_TIMER1_CNT);
-}
-
-static struct clocksource arc_counter_timer1 = {
- .name = "ARC Timer1",
- .rating = 300,
- .read = arc_read_timer1,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static int __init arc_cs_setup_timer1(struct device_node *node)
-{
- int ret;
-
- /* Local to CPU hence not usable in SMP */
- if (IS_ENABLED(CONFIG_SMP))
- return -EINVAL;
-
- ret = arc_get_timer_clk(node);
- if (ret)
- return ret;
-
- write_aux_reg(ARC_REG_TIMER1_LIMIT, ARC_TIMER_MAX);
- write_aux_reg(ARC_REG_TIMER1_CNT, 0);
- write_aux_reg(ARC_REG_TIMER1_CTRL, TIMER_CTRL_NH);
-
- return clocksource_register_hz(&arc_counter_timer1, arc_timer_freq);
-}
-
-/********** Clock Event Device *********/
-
-static int arc_timer_irq;
-
-/*
- * Arm the timer to interrupt after @cycles
- * The distinction for oneshot/periodic is done in arc_event_timer_ack() below
- */
-static void arc_timer_event_setup(unsigned int cycles)
-{
- write_aux_reg(ARC_REG_TIMER0_LIMIT, cycles);
- write_aux_reg(ARC_REG_TIMER0_CNT, 0); /* start from 0 */
-
- write_aux_reg(ARC_REG_TIMER0_CTRL, TIMER_CTRL_IE | TIMER_CTRL_NH);
-}
-
-
-static int arc_clkevent_set_next_event(unsigned long delta,
- struct clock_event_device *dev)
-{
- arc_timer_event_setup(delta);
- return 0;
-}
-
-static int arc_clkevent_set_periodic(struct clock_event_device *dev)
-{
- /*
- * At X Hz, 1 sec = 1000ms -> X cycles;
- * 10ms -> X / 100 cycles
- */
- arc_timer_event_setup(arc_timer_freq / HZ);
- return 0;
-}
-
-static DEFINE_PER_CPU(struct clock_event_device, arc_clockevent_device) = {
- .name = "ARC Timer0",
- .features = CLOCK_EVT_FEAT_ONESHOT |
- CLOCK_EVT_FEAT_PERIODIC,
- .rating = 300,
- .set_next_event = arc_clkevent_set_next_event,
- .set_state_periodic = arc_clkevent_set_periodic,
-};
-
-static irqreturn_t timer_irq_handler(int irq, void *dev_id)
-{
- /*
- * Note that generic IRQ core could have passed @evt for @dev_id if
- * irq_set_chip_and_handler() asked for handle_percpu_devid_irq()
- */
- struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
- int irq_reenable = clockevent_state_periodic(evt);
-
- /*
- * Any write to CTRL reg ACks the interrupt, we rewrite the
- * Count when [N]ot [H]alted bit.
- * And re-arm it if perioid by [I]nterrupt [E]nable bit
- */
- write_aux_reg(ARC_REG_TIMER0_CTRL, irq_reenable | TIMER_CTRL_NH);
-
- evt->event_handler(evt);
-
- return IRQ_HANDLED;
-}
-
-
-static int arc_timer_starting_cpu(unsigned int cpu)
-{
- struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
-
- evt->cpumask = cpumask_of(smp_processor_id());
-
- clockevents_config_and_register(evt, arc_timer_freq, 0, ARC_TIMER_MAX);
- enable_percpu_irq(arc_timer_irq, 0);
- return 0;
-}
-
-static int arc_timer_dying_cpu(unsigned int cpu)
-{
- disable_percpu_irq(arc_timer_irq);
- return 0;
-}
-
-/*
- * clockevent setup for boot CPU
- */
-static int __init arc_clockevent_setup(struct device_node *node)
-{
- struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
- int ret;
-
- arc_timer_irq = irq_of_parse_and_map(node, 0);
- if (arc_timer_irq <= 0) {
- pr_err("clockevent: missing irq");
- return -EINVAL;
- }
-
- ret = arc_get_timer_clk(node);
- if (ret) {
- pr_err("clockevent: missing clk");
- return ret;
- }
-
- /* Needs apriori irq_set_percpu_devid() done in intc map function */
- ret = request_percpu_irq(arc_timer_irq, timer_irq_handler,
- "Timer0 (per-cpu-tick)", evt);
- if (ret) {
- pr_err("clockevent: unable to request irq\n");
- return ret;
- }
-
- ret = cpuhp_setup_state(CPUHP_AP_ARC_TIMER_STARTING,
- "AP_ARC_TIMER_STARTING",
- arc_timer_starting_cpu,
- arc_timer_dying_cpu);
- if (ret) {
- pr_err("Failed to setup hotplug state");
- return ret;
- }
- return 0;
-}
-
-static int __init arc_of_timer_init(struct device_node *np)
-{
- static int init_count = 0;
- int ret;
-
- if (!init_count) {
- init_count = 1;
- ret = arc_clockevent_setup(np);
- } else {
- ret = arc_cs_setup_timer1(np);
- }
-
- return ret;
-}
-CLOCKSOURCE_OF_DECLARE(arc_clkevt, "snps,arc-timer", arc_of_timer_init);
-
-/*
- * Called from start_kernel() - boot CPU only
- */
-void __init time_init(void)
-{
- of_clk_init(NULL);
- clocksource_probe();
-}
diff --git a/arch/arc/plat-axs10x/axs10x.c b/arch/arc/plat-axs10x/axs10x.c
index 86548701023c..38ff349d7f2a 100644
--- a/arch/arc/plat-axs10x/axs10x.c
+++ b/arch/arc/plat-axs10x/axs10x.c
@@ -21,7 +21,7 @@
#include <asm/asm-offsets.h>
#include <asm/io.h>
#include <asm/mach_desc.h>
-#include <asm/mcip.h>
+#include <soc/arc/mcip.h>
#define AXS_MB_CGU 0xE0010000
#define AXS_MB_CREG 0xE0011000
diff --git a/arch/arc/plat-eznps/include/plat/ctop.h b/arch/arc/plat-eznps/include/plat/ctop.h
index 9d6718c1a199..ee2e32df5e90 100644
--- a/arch/arc/plat-eznps/include/plat/ctop.h
+++ b/arch/arc/plat-eznps/include/plat/ctop.h
@@ -46,9 +46,7 @@
#define CTOP_AUX_UDMC (CTOP_AUX_BASE + 0x300)
/* EZchip core instructions */
-#define CTOP_INST_HWSCHD_OFF_R3 0x3B6F00BF
#define CTOP_INST_HWSCHD_OFF_R4 0x3C6F00BF
-#define CTOP_INST_HWSCHD_RESTORE_R3 0x3E6F70C3
#define CTOP_INST_HWSCHD_RESTORE_R4 0x3E6F7103
#define CTOP_INST_SCHD_RW 0x3E6F7004
#define CTOP_INST_SCHD_RD 0x3E6F7084