diff options
Diffstat (limited to 'arch/sh')
50 files changed, 1232 insertions, 436 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 0d5f3a9bb315..ee086958b2b2 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -38,6 +38,7 @@ config SUPERH select GENERIC_IDLE_POLL_SETUP select GENERIC_CLOCKEVENTS select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST + select GENERIC_SCHED_CLOCK select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER @@ -45,6 +46,7 @@ config SUPERH select OLD_SIGSUSPEND select OLD_SIGACTION select HAVE_ARCH_AUDITSYSCALL + select HAVE_FUTEX_CMPXCHG if FUTEX select HAVE_NMI help The SuperH is a RISC processor targeted for use in embedded systems @@ -184,6 +186,12 @@ config CPU_SH2A select CPU_SH2 select UNCACHED_MAPPING +config CPU_J2 + bool + select CPU_SH2 + select OF + select OF_EARLY_FLATTREE + config CPU_SH3 bool select CPU_HAS_INTEVT @@ -250,6 +258,12 @@ config CPU_SUBTYPE_SH7619 select CPU_SH2 select SYS_SUPPORTS_SH_CMT +config CPU_SUBTYPE_J2 + bool "Support J2 processor" + select CPU_J2 + select SYS_SUPPORTS_SMP + select GENERIC_CLOCKEVENTS_BROADCAST if SMP + # SH-2A Processor Support config CPU_SUBTYPE_SH7201 @@ -739,6 +753,26 @@ endmenu menu "Boot options" +config USE_BUILTIN_DTB + bool "Use builtin DTB" + default n + depends on SH_DEVICE_TREE + help + Link a device tree blob for particular hardware into the kernel, + suppressing use of the DTB pointer provided by the bootloader. + This option should only be used with legacy bootloaders that are + not capable of providing a DTB to the kernel, or for experimental + hardware without stable device tree bindings. + +config BUILTIN_DTB_SOURCE + string "Source file for builtin DTB" + default "" + depends on USE_BUILTIN_DTB + help + Base name (without suffix, relative to arch/sh/boot/dts) for the + a DTS file that will be used to produce the DTB linked into the + kernel. + config ZERO_PAGE_OFFSET hex default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ diff --git a/arch/sh/Makefile b/arch/sh/Makefile index bf5b3f5f4962..00476662ac2c 100644 --- a/arch/sh/Makefile +++ b/arch/sh/Makefile @@ -31,6 +31,7 @@ isa-y := $(isa-y)-up endif cflags-$(CONFIG_CPU_SH2) := $(call cc-option,-m2,) +cflags-$(CONFIG_CPU_J2) := $(call cc-option,-mj2,) cflags-$(CONFIG_CPU_SH2A) += $(call cc-option,-m2a,) \ $(call cc-option,-m2a-nofpu,) \ $(call cc-option,-m4-nofpu,) @@ -130,6 +131,8 @@ head-y := arch/sh/kernel/head_$(BITS).o core-y += arch/sh/kernel/ arch/sh/mm/ arch/sh/boards/ core-$(CONFIG_SH_FPU_EMU) += arch/sh/math-emu/ +core-$(CONFIG_USE_BUILTIN_DTB) += arch/sh/boot/dts/ + # Mach groups machdir-$(CONFIG_SOLUTION_ENGINE) += mach-se machdir-$(CONFIG_SH_HP6XX) += mach-hp6xx diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig index e0db04664e2e..e9c2c42031fe 100644 --- a/arch/sh/boards/Kconfig +++ b/arch/sh/boards/Kconfig @@ -11,6 +11,7 @@ config SH_DEVICE_TREE select OF select OF_EARLY_FLATTREE select CLKSRC_OF + select COMMON_CLK select GENERIC_CALIBRATE_DELAY help Select Board Described by Device Tree to build a kernel that diff --git a/arch/sh/boards/board-secureedge5410.c b/arch/sh/boards/board-secureedge5410.c index 98b36205aa7b..97ec67ffec2b 100644 --- a/arch/sh/boards/board-secureedge5410.c +++ b/arch/sh/boards/board-secureedge5410.c @@ -14,7 +14,6 @@ #include <linux/interrupt.h> #include <linux/timer.h> #include <linux/delay.h> -#include <linux/module.h> #include <linux/sched.h> #include <asm/machvec.h> #include <mach/secureedge5410.h> @@ -49,7 +48,7 @@ static int __init eraseconfig_init(void) irq); return 0; } -module_init(eraseconfig_init); +device_initcall(eraseconfig_init); /* * Initialize IRQ setting diff --git a/arch/sh/boards/of-generic.c b/arch/sh/boards/of-generic.c index 911ffb9f115b..1fb6d5714bae 100644 --- a/arch/sh/boards/of-generic.c +++ b/arch/sh/boards/of-generic.c @@ -124,13 +124,22 @@ static void __init sh_of_time_init(void) static void __init sh_of_setup(char **cmdline_p) { + struct device_node *root; + +#ifdef CONFIG_USE_BUILTIN_DTB + unflatten_and_copy_device_tree(); +#else unflatten_device_tree(); +#endif board_time_init = sh_of_time_init; - sh_mv.mv_name = of_flat_dt_get_machine_name(); - if (!sh_mv.mv_name) - sh_mv.mv_name = "Unknown SH model"; + sh_mv.mv_name = "Unknown SH model"; + root = of_find_node_by_path("/"); + if (root) { + of_property_read_string(root, "model", &sh_mv.mv_name); + of_node_put(root); + } sh_of_smp_probe(); } diff --git a/arch/sh/boot/dts/Makefile b/arch/sh/boot/dts/Makefile new file mode 100644 index 000000000000..e5ce3a0de7f4 --- /dev/null +++ b/arch/sh/boot/dts/Makefile @@ -0,0 +1,3 @@ +obj-$(CONFIG_USE_BUILTIN_DTB) += $(patsubst "%",%,$(CONFIG_BUILTIN_DTB_SOURCE)).dtb.o + +clean-files := *.dtb.S diff --git a/arch/sh/boot/dts/j2_mimas_v2.dts b/arch/sh/boot/dts/j2_mimas_v2.dts new file mode 100755 index 000000000000..880de75360b3 --- /dev/null +++ b/arch/sh/boot/dts/j2_mimas_v2.dts @@ -0,0 +1,96 @@ +/dts-v1/; + +/ { + compatible = "jcore,j2-soc"; + model = "J2 FPGA SoC on Mimas v2 board"; + + #address-cells = <1>; + #size-cells = <1>; + + interrupt-parent = <&aic>; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + device_type = "cpu"; + compatible = "jcore,j2"; + reg = <0>; + clock-frequency = <50000000>; + d-cache-size = <8192>; + i-cache-size = <8192>; + d-cache-block-size = <16>; + i-cache-block-size = <16>; + }; + }; + + memory@10000000 { + device_type = "memory"; + reg = <0x10000000 0x4000000>; + }; + + aliases { + serial0 = &uart0; + spi0 = &spi0; + }; + + chosen { + stdout-path = "serial0"; + }; + + soc@abcd0000 { + compatible = "simple-bus"; + ranges = <0 0xabcd0000 0x100000>; + + #address-cells = <1>; + #size-cells = <1>; + + aic: interrupt-controller@200 { + compatible = "jcore,aic1"; + reg = <0x200 0x10>; + interrupt-controller; + #interrupt-cells = <1>; + }; + + cache-controller@c0 { + compatible = "jcore,cache"; + reg = <0xc0 4>; + }; + + timer@200 { + compatible = "jcore,pit"; + reg = <0x200 0x30>; + interrupts = <0x48>; + }; + + spi0: spi@40 { + compatible = "jcore,spi2"; + + #address-cells = <1>; + #size-cells = <0>; + + spi-max-frequency = <25000000>; + + reg = <0x40 0x8>; + + sdcard@0 { + compatible = "mmc-spi-slot"; + reg = <0>; + spi-max-frequency = <25000000>; + voltage-ranges = <3200 3400>; + mode = <0>; + }; + }; + + uart0: serial@100 { + clock-frequency = <125000000>; + compatible = "xlnx,xps-uartlite-1.00.a"; + current-speed = <19200>; + device_type = "serial"; + interrupts = <0x12>; + port-number = <0>; + reg = <0x100 0x10>; + }; + }; +}; diff --git a/arch/sh/configs/j2_defconfig b/arch/sh/configs/j2_defconfig new file mode 100644 index 000000000000..94d1eca52f72 --- /dev/null +++ b/arch/sh/configs/j2_defconfig @@ -0,0 +1,40 @@ +CONFIG_SMP=y +CONFIG_SYSVIPC=y +CONFIG_POSIX_MQUEUE=y +CONFIG_NO_HZ=y +CONFIG_HIGH_RES_TIMERS=y +CONFIG_CPU_SUBTYPE_J2=y +CONFIG_MEMORY_START=0x10000000 +CONFIG_MEMORY_SIZE=0x04000000 +CONFIG_CPU_BIG_ENDIAN=y +CONFIG_SH_DEVICE_TREE=y +CONFIG_HZ_100=y +CONFIG_CMDLINE_OVERWRITE=y +CONFIG_CMDLINE="console=ttyUL0 earlycon" +CONFIG_BINFMT_ELF_FDPIC=y +CONFIG_BINFMT_FLAT=y +CONFIG_NET=y +CONFIG_PACKET=y +CONFIG_UNIX=y +CONFIG_INET=y +CONFIG_DEVTMPFS=y +CONFIG_DEVTMPFS_MOUNT=y +CONFIG_NETDEVICES=y +CONFIG_SERIAL_UARTLITE=y +CONFIG_SERIAL_UARTLITE_CONSOLE=y +CONFIG_I2C=y +CONFIG_SPI=y +CONFIG_SPI_JCORE=y +CONFIG_WATCHDOG=y +CONFIG_MMC=y +CONFIG_MMC_SPI=y +CONFIG_CLKSRC_JCORE_PIT=y +CONFIG_JCORE_AIC=y +CONFIG_EXT4_FS=y +CONFIG_VFAT_FS=y +CONFIG_FAT_DEFAULT_IOCHARSET="ascii" +CONFIG_FAT_DEFAULT_UTF8=y +CONFIG_NLS_DEFAULT="utf8" +CONFIG_NLS_CODEPAGE_437=y +CONFIG_NLS_ASCII=y +CONFIG_NLS_UTF8=y diff --git a/arch/sh/drivers/heartbeat.c b/arch/sh/drivers/heartbeat.c index 7efc9c354fc7..49bace446a1a 100644 --- a/arch/sh/drivers/heartbeat.c +++ b/arch/sh/drivers/heartbeat.c @@ -19,7 +19,6 @@ * for more details. */ #include <linux/init.h> -#include <linux/module.h> #include <linux/platform_device.h> #include <linux/sched.h> #include <linux/timer.h> @@ -139,26 +138,11 @@ static int heartbeat_drv_probe(struct platform_device *pdev) return mod_timer(&hd->timer, jiffies + 1); } -static int heartbeat_drv_remove(struct platform_device *pdev) -{ - struct heartbeat_data *hd = platform_get_drvdata(pdev); - - del_timer_sync(&hd->timer); - iounmap(hd->base); - - platform_set_drvdata(pdev, NULL); - - if (!pdev->dev.platform_data) - kfree(hd); - - return 0; -} - static struct platform_driver heartbeat_driver = { .probe = heartbeat_drv_probe, - .remove = heartbeat_drv_remove, .driver = { - .name = DRV_NAME, + .name = DRV_NAME, + .suppress_bind_attrs = true, }, }; @@ -167,14 +151,4 @@ static int __init heartbeat_init(void) printk(KERN_NOTICE DRV_NAME ": version %s loaded\n", DRV_VERSION); return platform_driver_register(&heartbeat_driver); } - -static void __exit heartbeat_exit(void) -{ - platform_driver_unregister(&heartbeat_driver); -} -module_init(heartbeat_init); -module_exit(heartbeat_exit); - -MODULE_VERSION(DRV_VERSION); -MODULE_AUTHOR("Paul Mundt"); -MODULE_LICENSE("GPL v2"); +device_initcall(heartbeat_init); diff --git a/arch/sh/include/asm/atomic.h b/arch/sh/include/asm/atomic.h index c399e1c55685..8a7bd80c8b33 100644 --- a/arch/sh/include/asm/atomic.h +++ b/arch/sh/include/asm/atomic.h @@ -1,6 +1,12 @@ #ifndef __ASM_SH_ATOMIC_H #define __ASM_SH_ATOMIC_H +#if defined(CONFIG_CPU_J2) + +#include <asm-generic/atomic.h> + +#else + /* * Atomic operations that C can't guarantee us. Useful for * resource counting etc.. @@ -63,4 +69,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) return c; } +#endif /* CONFIG_CPU_J2 */ + #endif /* __ASM_SH_ATOMIC_H */ diff --git a/arch/sh/include/asm/barrier.h b/arch/sh/include/asm/barrier.h index 8a84e05adb2e..3c30b6e166b6 100644 --- a/arch/sh/include/asm/barrier.h +++ b/arch/sh/include/asm/barrier.h @@ -29,6 +29,11 @@ #define wmb() mb() #define ctrl_barrier() __icbi(PAGE_OFFSET) #else +#if defined(CONFIG_CPU_J2) && defined(CONFIG_SMP) +#define __smp_mb() do { int tmp = 0; __asm__ __volatile__ ("cas.l %0,%0,@%1" : "+r"(tmp) : "z"(&tmp) : "memory", "t"); } while(0) +#define __smp_rmb() __smp_mb() +#define __smp_wmb() __smp_mb() +#endif #define ctrl_barrier() __asm__ __volatile__ ("nop;nop;nop;nop;nop;nop;nop;nop") #endif diff --git a/arch/sh/include/asm/bitops-cas.h b/arch/sh/include/asm/bitops-cas.h new file mode 100644 index 000000000000..88f793c04d3c --- /dev/null +++ b/arch/sh/include/asm/bitops-cas.h @@ -0,0 +1,93 @@ +#ifndef __ASM_SH_BITOPS_CAS_H +#define __ASM_SH_BITOPS_CAS_H + +static inline unsigned __bo_cas(volatile unsigned *p, unsigned old, unsigned new) +{ + __asm__ __volatile__("cas.l %1,%0,@r0" + : "+r"(new) + : "r"(old), "z"(p) + : "t", "memory" ); + return new; +} + +static inline void set_bit(int nr, volatile void *addr) +{ + unsigned mask, old; + volatile unsigned *a = addr; + + a += nr >> 5; + mask = 1U << (nr & 0x1f); + + do old = *a; + while (__bo_cas(a, old, old|mask) != old); +} + +static inline void clear_bit(int nr, volatile void *addr) +{ + unsigned mask, old; + volatile unsigned *a = addr; + + a += nr >> 5; + mask = 1U << (nr & 0x1f); + + do old = *a; + while (__bo_cas(a, old, old&~mask) != old); +} + +static inline void change_bit(int nr, volatile void *addr) +{ + unsigned mask, old; + volatile unsigned *a = addr; + + a += nr >> 5; + mask = 1U << (nr & 0x1f); + + do old = *a; + while (__bo_cas(a, old, old^mask) != old); +} + +static inline int test_and_set_bit(int nr, volatile void *addr) +{ + unsigned mask, old; + volatile unsigned *a = addr; + + a += nr >> 5; + mask = 1U << (nr & 0x1f); + + do old = *a; + while (__bo_cas(a, old, old|mask) != old); + + return !!(old & mask); +} + +static inline int test_and_clear_bit(int nr, volatile void *addr) +{ + unsigned mask, old; + volatile unsigned *a = addr; + + a += nr >> 5; + mask = 1U << (nr & 0x1f); + + do old = *a; + while (__bo_cas(a, old, old&~mask) != old); + + return !!(old & mask); +} + +static inline int test_and_change_bit(int nr, volatile void *addr) +{ + unsigned mask, old; + volatile unsigned *a = addr; + + a += nr >> 5; + mask = 1U << (nr & 0x1f); + + do old = *a; + while (__bo_cas(a, old, old^mask) != old); + + return !!(old & mask); +} + +#include <asm-generic/bitops/non-atomic.h> + +#endif /* __ASM_SH_BITOPS_CAS_H */ diff --git a/arch/sh/include/asm/bitops.h b/arch/sh/include/asm/bitops.h index fc8e652cf173..a8699d60a8c4 100644 --- a/arch/sh/include/asm/bitops.h +++ b/arch/sh/include/asm/bitops.h @@ -18,6 +18,8 @@ #include <asm/bitops-op32.h> #elif defined(CONFIG_CPU_SH4A) #include <asm/bitops-llsc.h> +#elif defined(CONFIG_CPU_J2) && defined(CONFIG_SMP) +#include <asm/bitops-cas.h> #else #include <asm-generic/bitops/atomic.h> #include <asm-generic/bitops/non-atomic.h> diff --git a/arch/sh/include/asm/cmpxchg-cas.h b/arch/sh/include/asm/cmpxchg-cas.h new file mode 100644 index 000000000000..d0d86649e8c1 --- /dev/null +++ b/arch/sh/include/asm/cmpxchg-cas.h @@ -0,0 +1,24 @@ +#ifndef __ASM_SH_CMPXCHG_CAS_H +#define __ASM_SH_CMPXCHG_CAS_H + +static inline unsigned long +__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new) +{ + __asm__ __volatile__("cas.l %1,%0,@r0" + : "+r"(new) + : "r"(old), "z"(m) + : "t", "memory" ); + return new; +} + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + unsigned long old; + do old = *m; + while (__cmpxchg_u32(m, old, val) != old); + return old; +} + +#include <asm/cmpxchg-xchg.h> + +#endif /* __ASM_SH_CMPXCHG_CAS_H */ diff --git a/arch/sh/include/asm/cmpxchg-xchg.h b/arch/sh/include/asm/cmpxchg-xchg.h index 7219719c23a3..1e881f5db659 100644 --- a/arch/sh/include/asm/cmpxchg-xchg.h +++ b/arch/sh/include/asm/cmpxchg-xchg.h @@ -21,7 +21,7 @@ static inline u32 __xchg_cmpxchg(volatile void *ptr, u32 x, int size) int off = (unsigned long)ptr % sizeof(u32); volatile u32 *p = ptr - off; #ifdef __BIG_ENDIAN - int bitoff = (sizeof(u32) - 1 - off) * BITS_PER_BYTE; + int bitoff = (sizeof(u32) - size - off) * BITS_PER_BYTE; #else int bitoff = off * BITS_PER_BYTE; #endif diff --git a/arch/sh/include/asm/cmpxchg.h b/arch/sh/include/asm/cmpxchg.h index 5225916c1057..3dfe0467a773 100644 --- a/arch/sh/include/asm/cmpxchg.h +++ b/arch/sh/include/asm/cmpxchg.h @@ -13,6 +13,8 @@ #include <asm/cmpxchg-grb.h> #elif defined(CONFIG_CPU_SH4A) #include <asm/cmpxchg-llsc.h> +#elif defined(CONFIG_CPU_J2) && defined(CONFIG_SMP) +#include <asm/cmpxchg-cas.h> #else #include <asm/cmpxchg-irq.h> #endif diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h index e11cf0c8206b..0052ad40e86d 100644 --- a/arch/sh/include/asm/dma-mapping.h +++ b/arch/sh/include/asm/dma-mapping.h @@ -17,9 +17,9 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size, /* arch/sh/mm/consistent.c */ extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr, gfp_t flag, - struct dma_attrs *attrs); + unsigned long attrs); extern void dma_generic_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, - struct dma_attrs *attrs); + unsigned long attrs); #endif /* __ASM_SH_DMA_MAPPING_H */ diff --git a/arch/sh/include/asm/futex-cas.h b/arch/sh/include/asm/futex-cas.h new file mode 100644 index 000000000000..267cb7a5f101 --- /dev/null +++ b/arch/sh/include/asm/futex-cas.h @@ -0,0 +1,34 @@ +#ifndef __ASM_SH_FUTEX_CAS_H +#define __ASM_SH_FUTEX_CAS_H + +static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, + u32 __user *uaddr, + u32 oldval, u32 newval) +{ + int err = 0; + __asm__ __volatile__( + "1:\n\t" + "cas.l %2, %1, @r0\n" + "2:\n\t" +#ifdef CONFIG_MMU + ".section .fixup,\"ax\"\n" + "3:\n\t" + "mov.l 4f, %0\n\t" + "jmp @%0\n\t" + " mov %3, %0\n\t" + ".balign 4\n" + "4: .long 2b\n\t" + ".previous\n" + ".section __ex_table,\"a\"\n\t" + ".long 1b, 3b\n\t" + ".previous" +#endif + :"+r" (err), "+r" (newval) + :"r" (oldval), "i" (-EFAULT), "z" (uaddr) + :"t", "memory"); + if (err) return err; + *uval = newval; + return 0; +} + +#endif /* __ASM_SH_FUTEX_CAS_H */ diff --git a/arch/sh/include/asm/futex-irq.h b/arch/sh/include/asm/futex-irq.h index 63d33129ea23..ab01dbee0a82 100644 --- a/arch/sh/include/asm/futex-irq.h +++ b/arch/sh/include/asm/futex-irq.h @@ -1,92 +1,6 @@ #ifndef __ASM_SH_FUTEX_IRQ_H #define __ASM_SH_FUTEX_IRQ_H - -static inline int atomic_futex_op_xchg_set(int oparg, u32 __user *uaddr, - int *oldval) -{ - unsigned long flags; - int ret; - - local_irq_save(flags); - - ret = get_user(*oldval, uaddr); - if (!ret) - ret = put_user(oparg, uaddr); - - local_irq_restore(flags); - - return ret; -} - -static inline int atomic_futex_op_xchg_add(int oparg, u32 __user *uaddr, - int *oldval) -{ - unsigned long flags; - int ret; - - local_irq_save(flags); - - ret = get_user(*oldval, uaddr); - if (!ret) - ret = put_user(*oldval + oparg, uaddr); - - local_irq_restore(flags); - - return ret; -} - -static inline int atomic_futex_op_xchg_or(int oparg, u32 __user *uaddr, - int *oldval) -{ - unsigned long flags; - int ret; - - local_irq_save(flags); - - ret = get_user(*oldval, uaddr); - if (!ret) - ret = put_user(*oldval | oparg, uaddr); - - local_irq_restore(flags); - - return ret; -} - -static inline int atomic_futex_op_xchg_and(int oparg, u32 __user *uaddr, - int *oldval) -{ - unsigned long flags; - int ret; - - local_irq_save(flags); - - ret = get_user(*oldval, uaddr); - if (!ret) - ret = put_user(*oldval & oparg, uaddr); - - local_irq_restore(flags); - - return ret; -} - -static inline int atomic_futex_op_xchg_xor(int oparg, u32 __user *uaddr, - int *oldval) -{ - unsigned long flags; - int ret; - - local_irq_save(flags); - - ret = get_user(*oldval, uaddr); - if (!ret) - ret = put_user(*oldval ^ oparg, uaddr); - - local_irq_restore(flags); - - return ret; -} - static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval, u32 newval) diff --git a/arch/sh/include/asm/futex-llsc.h b/arch/sh/include/asm/futex-llsc.h new file mode 100644 index 000000000000..23591703bec0 --- /dev/null +++ b/arch/sh/include/asm/futex-llsc.h @@ -0,0 +1,41 @@ +#ifndef __ASM_SH_FUTEX_LLSC_H +#define __ASM_SH_FUTEX_LLSC_H + +static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, + u32 __user *uaddr, + u32 oldval, u32 newval) +{ + int err = 0; + __asm__ __volatile__( + "synco\n" + "1:\n\t" + "movli.l @%2, r0\n\t" + "mov r0, %1\n\t" + "cmp/eq %1, %4\n\t" + "bf 2f\n\t" + "mov %5, r0\n\t" + "movco.l r0, @%2\n\t" + "bf 1b\n" + "2:\n\t" + "synco\n\t" +#ifdef CONFIG_MMU + ".section .fixup,\"ax\"\n" + "3:\n\t" + "mov.l 4f, %0\n\t" + "jmp @%0\n\t" + " mov %3, %0\n\t" + ".balign 4\n" + "4: .long 2b\n\t" + ".previous\n" + ".section __ex_table,\"a\"\n\t" + ".long 1b, 3b\n\t" + ".previous" +#endif + :"+r" (err), "=&r" (*uval) + :"r" (uaddr), "i" (-EFAULT), "r" (oldval), "r" (newval) + :"t", "memory", "r0"); + if (err) return err; + return 0; +} + +#endif /* __ASM_SH_FUTEX_LLSC_H */ diff --git a/arch/sh/include/asm/futex.h b/arch/sh/include/asm/futex.h index 7be39a646fbd..d0078747d308 100644 --- a/arch/sh/include/asm/futex.h +++ b/arch/sh/include/asm/futex.h @@ -7,16 +7,34 @@ #include <linux/uaccess.h> #include <asm/errno.h> -/* XXX: UP variants, fix for SH-4A and SMP.. */ +#if !defined(CONFIG_SMP) #include <asm/futex-irq.h> +#elif defined(CONFIG_CPU_J2) +#include <asm/futex-cas.h> +#elif defined(CONFIG_CPU_SH4A) +#include <asm/futex-llsc.h> +#else +#error SMP not supported on this configuration. +#endif + +static inline int +futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, + u32 oldval, u32 newval) +{ + if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) + return -EFAULT; + + return atomic_futex_op_cmpxchg_inatomic(uval, uaddr, oldval, newval); +} static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) { int op = (encoded_op >> 28) & 7; int cmp = (encoded_op >> 24) & 15; - int oparg = (encoded_op << 8) >> 20; - int cmparg = (encoded_op << 20) >> 20; - int oldval = 0, ret; + u32 oparg = (encoded_op << 8) >> 20; + u32 cmparg = (encoded_op << 20) >> 20; + u32 oldval, newval, prev; + int ret; if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) oparg = 1 << oparg; @@ -26,26 +44,39 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) pagefault_disable(); - switch (op) { - case FUTEX_OP_SET: - ret = atomic_futex_op_xchg_set(oparg, uaddr, &oldval); - break; - case FUTEX_OP_ADD: - ret = atomic_futex_op_xchg_add(oparg, uaddr, &oldval); - break; - case FUTEX_OP_OR: - ret = atomic_futex_op_xchg_or(oparg, uaddr, &oldval); - break; - case FUTEX_OP_ANDN: - ret = atomic_futex_op_xchg_and(~oparg, uaddr, &oldval); - break; - case FUTEX_OP_XOR: - ret = atomic_futex_op_xchg_xor(oparg, uaddr, &oldval); - break; - default: - ret = -ENOSYS; - break; - } + do { + if (op == FUTEX_OP_SET) + ret = oldval = 0; + else + ret = get_user(oldval, uaddr); + + if (ret) break; + + switch (op) { + case FUTEX_OP_SET: + newval = oparg; + break; + case FUTEX_OP_ADD: + newval = oldval + oparg; + break; + case FUTEX_OP_OR: + newval = oldval | oparg; + break; + case FUTEX_OP_ANDN: + newval = oldval & ~oparg; + break; + case FUTEX_OP_XOR: + newval = oldval ^ oparg; + break; + default: + ret = -ENOSYS; + break; + } + + if (ret) break; + + ret = futex_atomic_cmpxchg_inatomic(&prev, uaddr, oldval, newval); + } while (!ret && prev != oldval); pagefault_enable(); @@ -53,10 +84,10 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) switch (cmp) { case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break; case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break; - case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break; - case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break; - case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break; - case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break; + case FUTEX_OP_CMP_LT: ret = ((int)oldval < (int)cmparg); break; + case FUTEX_OP_CMP_GE: ret = ((int)oldval >= (int)cmparg); break; + case FUTEX_OP_CMP_LE: ret = ((int)oldval <= (int)cmparg); break; + case FUTEX_OP_CMP_GT: ret = ((int)oldval > (int)cmparg); break; default: ret = -ENOSYS; } } @@ -64,15 +95,5 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) return ret; } -static inline int -futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, - u32 oldval, u32 newval) -{ - if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) - return -EFAULT; - - return atomic_futex_op_cmpxchg_inatomic(uval, uaddr, oldval, newval); -} - #endif /* __KERNEL__ */ #endif /* __ASM_SH_FUTEX_H */ diff --git a/arch/sh/include/asm/mc146818rtc.h b/arch/sh/include/asm/mc146818rtc.h deleted file mode 100644 index 0aee96a97330..000000000000 --- a/arch/sh/include/asm/mc146818rtc.h +++ /dev/null @@ -1,7 +0,0 @@ -/* - * Machine dependent access functions for RTC registers. - */ -#ifndef _ASM_MC146818RTC_H -#define _ASM_MC146818RTC_H - -#endif /* _ASM_MC146818RTC_H */ diff --git a/arch/sh/include/asm/processor.h b/arch/sh/include/asm/processor.h index 1506897648aa..f9a09942a32d 100644 --- a/arch/sh/include/asm/processor.h +++ b/arch/sh/include/asm/processor.h @@ -15,7 +15,7 @@ */ enum cpu_type { /* SH-2 types */ - CPU_SH7619, + CPU_SH7619, CPU_J2, /* SH-2A types */ CPU_SH7201, CPU_SH7203, CPU_SH7206, CPU_SH7263, CPU_SH7264, CPU_SH7269, diff --git a/arch/sh/include/asm/rtc.h b/arch/sh/include/asm/rtc.h index 52b0c2dba979..f7b010d48af7 100644 --- a/arch/sh/include/asm/rtc.h +++ b/arch/sh/include/asm/rtc.h @@ -6,17 +6,6 @@ extern void (*board_time_init)(void); extern void (*rtc_sh_get_time)(struct timespec *); extern int (*rtc_sh_set_time)(const time_t); -/* some dummy definitions */ -#define RTC_BATT_BAD 0x100 /* battery bad */ -#define RTC_SQWE 0x08 /* enable square-wave output */ -#define RTC_DM_BINARY 0x04 /* all time/date values are BCD if clear */ -#define RTC_24H 0x02 /* 24 hour mode - else hours bit 7 means pm */ -#define RTC_DST_EN 0x01 /* auto switch DST - works f. USA only */ - -struct rtc_time; -unsigned int get_rtc_time(struct rtc_time *); -int set_rtc_time(struct rtc_time *); - #define RTC_CAP_4_DIGIT_YEAR (1 << 0) struct sh_rtc_platform_info { diff --git a/arch/sh/include/asm/spinlock-cas.h b/arch/sh/include/asm/spinlock-cas.h new file mode 100644 index 000000000000..c46e8cc7b515 --- /dev/null +++ b/arch/sh/include/asm/spinlock-cas.h @@ -0,0 +1,117 @@ +/* + * include/asm-sh/spinlock-cas.h + * + * Copyright (C) 2015 SEI + * + * 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. + */ +#ifndef __ASM_SH_SPINLOCK_CAS_H +#define __ASM_SH_SPINLOCK_CAS_H + +#include <asm/barrier.h> +#include <asm/processor.h> + +static inline unsigned __sl_cas(volatile unsigned *p, unsigned old, unsigned new) +{ + __asm__ __volatile__("cas.l %1,%0,@r0" + : "+r"(new) + : "r"(old), "z"(p) + : "t", "memory" ); + return new; +} + +/* + * Your basic SMP spinlocks, allowing only a single CPU anywhere + */ + +#define arch_spin_is_locked(x) ((x)->lock <= 0) +#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) + +static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) +{ + smp_cond_load_acquire(&lock->lock, VAL > 0); +} + +static inline void arch_spin_lock(arch_spinlock_t *lock) +{ + while (!__sl_cas(&lock->lock, 1, 0)); +} + +static inline void arch_spin_unlock(arch_spinlock_t *lock) +{ + __sl_cas(&lock->lock, 0, 1); +} + +static inline int arch_spin_trylock(arch_spinlock_t *lock) +{ + return __sl_cas(&lock->lock, 1, 0); +} + +/* + * Read-write spinlocks, allowing multiple readers but only one writer. + * + * NOTE! it is quite common to have readers in interrupts but no interrupt + * writers. For those circumstances we can "mix" irq-safe locks - any writer + * needs to get a irq-safe write-lock, but readers can get non-irqsafe + * read-locks. + */ + +/** + * read_can_lock - would read_trylock() succeed? + * @lock: the rwlock in question. + */ +#define arch_read_can_lock(x) ((x)->lock > 0) + +/** + * write_can_lock - would write_trylock() succeed? + * @lock: the rwlock in question. + */ +#define arch_write_can_lock(x) ((x)->lock == RW_LOCK_BIAS) + +static inline void arch_read_lock(arch_rwlock_t *rw) +{ + unsigned old; + do old = rw->lock; + while (!old || __sl_cas(&rw->lock, old, old-1) != old); +} + +static inline void arch_read_unlock(arch_rwlock_t *rw) +{ + unsigned old; + do old = rw->lock; + while (__sl_cas(&rw->lock, old, old+1) != old); +} + +static inline void arch_write_lock(arch_rwlock_t *rw) +{ + while (__sl_cas(&rw->lock, RW_LOCK_BIAS, 0) != RW_LOCK_BIAS); +} + +static inline void arch_write_unlock(arch_rwlock_t *rw) +{ + __sl_cas(&rw->lock, 0, RW_LOCK_BIAS); +} + +static inline int arch_read_trylock(arch_rwlock_t *rw) +{ + unsigned old; + do old = rw->lock; + while (old && __sl_cas(&rw->lock, old, old-1) != old); + return !!old; +} + +static inline int arch_write_trylock(arch_rwlock_t *rw) +{ + return __sl_cas(&rw->lock, RW_LOCK_BIAS, 0) == RW_LOCK_BIAS; +} + +#define arch_read_lock_flags(lock, flags) arch_read_lock(lock) +#define arch_write_lock_flags(lock, flags) arch_write_lock(lock) + +#define arch_spin_relax(lock) cpu_relax() +#define arch_read_relax(lock) cpu_relax() +#define arch_write_relax(lock) cpu_relax() + +#endif /* __ASM_SH_SPINLOCK_CAS_H */ diff --git a/arch/sh/include/asm/spinlock-llsc.h b/arch/sh/include/asm/spinlock-llsc.h new file mode 100644 index 000000000000..cec78143fa83 --- /dev/null +++ b/arch/sh/include/asm/spinlock-llsc.h @@ -0,0 +1,224 @@ +/* + * include/asm-sh/spinlock-llsc.h + * + * Copyright (C) 2002, 2003 Paul Mundt + * Copyright (C) 2006, 2007 Akio Idehara + * + * 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. + */ +#ifndef __ASM_SH_SPINLOCK_LLSC_H +#define __ASM_SH_SPINLOCK_LLSC_H + +#include <asm/barrier.h> +#include <asm/processor.h> + +/* + * Your basic SMP spinlocks, allowing only a single CPU anywhere + */ + +#define arch_spin_is_locked(x) ((x)->lock <= 0) +#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) + +static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) +{ + smp_cond_load_acquire(&lock->lock, VAL > 0); +} + +/* + * Simple spin lock operations. There are two variants, one clears IRQ's + * on the local processor, one does not. + * + * We make no fairness assumptions. They have a cost. + */ +static inline void arch_spin_lock(arch_spinlock_t *lock) +{ + unsigned long tmp; + unsigned long oldval; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%2, %0 ! arch_spin_lock \n\t" + "mov %0, %1 \n\t" + "mov #0, %0 \n\t" + "movco.l %0, @%2 \n\t" + "bf 1b \n\t" + "cmp/pl %1 \n\t" + "bf 1b \n\t" + : "=&z" (tmp), "=&r" (oldval) + : "r" (&lock->lock) + : "t", "memory" + ); +} + +static inline void arch_spin_unlock(arch_spinlock_t *lock) +{ + unsigned long tmp; + + __asm__ __volatile__ ( + "mov #1, %0 ! arch_spin_unlock \n\t" + "mov.l %0, @%1 \n\t" + : "=&z" (tmp) + : "r" (&lock->lock) + : "t", "memory" + ); +} + +static inline int arch_spin_trylock(arch_spinlock_t *lock) +{ + unsigned long tmp, oldval; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%2, %0 ! arch_spin_trylock \n\t" + "mov %0, %1 \n\t" + "mov #0, %0 \n\t" + "movco.l %0, @%2 \n\t" + "bf 1b \n\t" + "synco \n\t" + : "=&z" (tmp), "=&r" (oldval) + : "r" (&lock->lock) + : "t", "memory" + ); + + return oldval; +} + +/* + * Read-write spinlocks, allowing multiple readers but only one writer. + * + * NOTE! it is quite common to have readers in interrupts but no interrupt + * writers. For those circumstances we can "mix" irq-safe locks - any writer + * needs to get a irq-safe write-lock, but readers can get non-irqsafe + * read-locks. + */ + +/** + * read_can_lock - would read_trylock() succeed? + * @lock: the rwlock in question. + */ +#define arch_read_can_lock(x) ((x)->lock > 0) + +/** + * write_can_lock - would write_trylock() succeed? + * @lock: the rwlock in question. + */ +#define arch_write_can_lock(x) ((x)->lock == RW_LOCK_BIAS) + +static inline void arch_read_lock(arch_rwlock_t *rw) +{ + unsigned long tmp; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%1, %0 ! arch_read_lock \n\t" + "cmp/pl %0 \n\t" + "bf 1b \n\t" + "add #-1, %0 \n\t" + "movco.l %0, @%1 \n\t" + "bf 1b \n\t" + : "=&z" (tmp) + : "r" (&rw->lock) + : "t", "memory" + ); +} + +static inline void arch_read_unlock(arch_rwlock_t *rw) +{ + unsigned long tmp; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%1, %0 ! arch_read_unlock \n\t" + "add #1, %0 \n\t" + "movco.l %0, @%1 \n\t" + "bf 1b \n\t" + : "=&z" (tmp) + : "r" (&rw->lock) + : "t", "memory" + ); +} + +static inline void arch_write_lock(arch_rwlock_t *rw) +{ + unsigned long tmp; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%1, %0 ! arch_write_lock \n\t" + "cmp/hs %2, %0 \n\t" + "bf 1b \n\t" + "sub %2, %0 \n\t" + "movco.l %0, @%1 \n\t" + "bf 1b \n\t" + : "=&z" (tmp) + : "r" (&rw->lock), "r" (RW_LOCK_BIAS) + : "t", "memory" + ); +} + +static inline void arch_write_unlock(arch_rwlock_t *rw) +{ + __asm__ __volatile__ ( + "mov.l %1, @%0 ! arch_write_unlock \n\t" + : + : "r" (&rw->lock), "r" (RW_LOCK_BIAS) + : "t", "memory" + ); +} + +static inline int arch_read_trylock(arch_rwlock_t *rw) +{ + unsigned long tmp, oldval; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%2, %0 ! arch_read_trylock \n\t" + "mov %0, %1 \n\t" + "cmp/pl %0 \n\t" + "bf 2f \n\t" + "add #-1, %0 \n\t" + "movco.l %0, @%2 \n\t" + "bf 1b \n\t" + "2: \n\t" + "synco \n\t" + : "=&z" (tmp), "=&r" (oldval) + : "r" (&rw->lock) + : "t", "memory" + ); + + return (oldval > 0); +} + +static inline int arch_write_trylock(arch_rwlock_t *rw) +{ + unsigned long tmp, oldval; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%2, %0 ! arch_write_trylock \n\t" + "mov %0, %1 \n\t" + "cmp/hs %3, %0 \n\t" + "bf 2f \n\t" + "sub %3, %0 \n\t" + "2: \n\t" + "movco.l %0, @%2 \n\t" + "bf 1b \n\t" + "synco \n\t" + : "=&z" (tmp), "=&r" (oldval) + : "r" (&rw->lock), "r" (RW_LOCK_BIAS) + : "t", "memory" + ); + + return (oldval > (RW_LOCK_BIAS - 1)); +} + +#define arch_read_lock_flags(lock, flags) arch_read_lock(lock) +#define arch_write_lock_flags(lock, flags) arch_write_lock(lock) + +#define arch_spin_relax(lock) cpu_relax() +#define arch_read_relax(lock) cpu_relax() +#define arch_write_relax(lock) cpu_relax() + +#endif /* __ASM_SH_SPINLOCK_LLSC_H */ diff --git a/arch/sh/include/asm/spinlock.h b/arch/sh/include/asm/spinlock.h index 416834b60ad0..c2c61ea6a8e2 100644 --- a/arch/sh/include/asm/spinlock.h +++ b/arch/sh/include/asm/spinlock.h @@ -11,222 +11,12 @@ #ifndef __ASM_SH_SPINLOCK_H #define __ASM_SH_SPINLOCK_H -/* - * The only locking implemented here uses SH-4A opcodes. For others, - * split this out as per atomic-*.h. - */ -#ifndef CONFIG_CPU_SH4A -#error "Need movli.l/movco.l for spinlocks" +#if defined(CONFIG_CPU_SH4A) +#include <asm/spinlock-llsc.h> +#elif defined(CONFIG_CPU_J2) +#include <asm/spinlock-cas.h> +#else +#error "The configured cpu type does not support spinlocks" #endif -#include <asm/barrier.h> -#include <asm/processor.h> - -/* - * Your basic SMP spinlocks, allowing only a single CPU anywhere - */ - -#define arch_spin_is_locked(x) ((x)->lock <= 0) -#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) - -static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) -{ - smp_cond_load_acquire(&lock->lock, VAL > 0); -} - -/* - * Simple spin lock operations. There are two variants, one clears IRQ's - * on the local processor, one does not. - * - * We make no fairness assumptions. They have a cost. - */ -static inline void arch_spin_lock(arch_spinlock_t *lock) -{ - unsigned long tmp; - unsigned long oldval; - - __asm__ __volatile__ ( - "1: \n\t" - "movli.l @%2, %0 ! arch_spin_lock \n\t" - "mov %0, %1 \n\t" - "mov #0, %0 \n\t" - "movco.l %0, @%2 \n\t" - "bf 1b \n\t" - "cmp/pl %1 \n\t" - "bf 1b \n\t" - : "=&z" (tmp), "=&r" (oldval) - : "r" (&lock->lock) - : "t", "memory" - ); -} - -static inline void arch_spin_unlock(arch_spinlock_t *lock) -{ - unsigned long tmp; - - __asm__ __volatile__ ( - "mov #1, %0 ! arch_spin_unlock \n\t" - "mov.l %0, @%1 \n\t" - : "=&z" (tmp) - : "r" (&lock->lock) - : "t", "memory" - ); -} - -static inline int arch_spin_trylock(arch_spinlock_t *lock) -{ - unsigned long tmp, oldval; - - __asm__ __volatile__ ( - "1: \n\t" - "movli.l @%2, %0 ! arch_spin_trylock \n\t" - "mov %0, %1 \n\t" - "mov #0, %0 \n\t" - "movco.l %0, @%2 \n\t" - "bf 1b \n\t" - "synco \n\t" - : "=&z" (tmp), "=&r" (oldval) - : "r" (&lock->lock) - : "t", "memory" - ); - - return oldval; -} - -/* - * Read-write spinlocks, allowing multiple readers but only one writer. - * - * NOTE! it is quite common to have readers in interrupts but no interrupt - * writers. For those circumstances we can "mix" irq-safe locks - any writer - * needs to get a irq-safe write-lock, but readers can get non-irqsafe - * read-locks. - */ - -/** - * read_can_lock - would read_trylock() succeed? - * @lock: the rwlock in question. - */ -#define arch_read_can_lock(x) ((x)->lock > 0) - -/** - * write_can_lock - would write_trylock() succeed? - * @lock: the rwlock in question. - */ -#define arch_write_can_lock(x) ((x)->lock == RW_LOCK_BIAS) - -static inline void arch_read_lock(arch_rwlock_t *rw) -{ - unsigned long tmp; - - __asm__ __volatile__ ( - "1: \n\t" - "movli.l @%1, %0 ! arch_read_lock \n\t" - "cmp/pl %0 \n\t" - "bf 1b \n\t" - "add #-1, %0 \n\t" - "movco.l %0, @%1 \n\t" - "bf 1b \n\t" - : "=&z" (tmp) - : "r" (&rw->lock) - : "t", "memory" - ); -} - -static inline void arch_read_unlock(arch_rwlock_t *rw) -{ - unsigned long tmp; - - __asm__ __volatile__ ( - "1: \n\t" - "movli.l @%1, %0 ! arch_read_unlock \n\t" - "add #1, %0 \n\t" - "movco.l %0, @%1 \n\t" - "bf 1b \n\t" - : "=&z" (tmp) - : "r" (&rw->lock) - : "t", "memory" - ); -} - -static inline void arch_write_lock(arch_rwlock_t *rw) -{ - unsigned long tmp; - - __asm__ __volatile__ ( - "1: \n\t" - "movli.l @%1, %0 ! arch_write_lock \n\t" - "cmp/hs %2, %0 \n\t" - "bf 1b \n\t" - "sub %2, %0 \n\t" - "movco.l %0, @%1 \n\t" - "bf 1b \n\t" - : "=&z" (tmp) - : "r" (&rw->lock), "r" (RW_LOCK_BIAS) - : "t", "memory" - ); -} - -static inline void arch_write_unlock(arch_rwlock_t *rw) -{ - __asm__ __volatile__ ( - "mov.l %1, @%0 ! arch_write_unlock \n\t" - : - : "r" (&rw->lock), "r" (RW_LOCK_BIAS) - : "t", "memory" - ); -} - -static inline int arch_read_trylock(arch_rwlock_t *rw) -{ - unsigned long tmp, oldval; - - __asm__ __volatile__ ( - "1: \n\t" - "movli.l @%2, %0 ! arch_read_trylock \n\t" - "mov %0, %1 \n\t" - "cmp/pl %0 \n\t" - "bf 2f \n\t" - "add #-1, %0 \n\t" - "movco.l %0, @%2 \n\t" - "bf 1b \n\t" - "2: \n\t" - "synco \n\t" - : "=&z" (tmp), "=&r" (oldval) - : "r" (&rw->lock) - : "t", "memory" - ); - - return (oldval > 0); -} - -static inline int arch_write_trylock(arch_rwlock_t *rw) -{ - unsigned long tmp, oldval; - - __asm__ __volatile__ ( - "1: \n\t" - "movli.l @%2, %0 ! arch_write_trylock \n\t" - "mov %0, %1 \n\t" - "cmp/hs %3, %0 \n\t" - "bf 2f \n\t" - "sub %3, %0 \n\t" - "2: \n\t" - "movco.l %0, @%2 \n\t" - "bf 1b \n\t" - "synco \n\t" - : "=&z" (tmp), "=&r" (oldval) - : "r" (&rw->lock), "r" (RW_LOCK_BIAS) - : "t", "memory" - ); - - return (oldval > (RW_LOCK_BIAS - 1)); -} - -#define arch_read_lock_flags(lock, flags) arch_read_lock(lock) -#define arch_write_lock_flags(lock, flags) arch_write_lock(lock) - -#define arch_spin_relax(lock) cpu_relax() -#define arch_read_relax(lock) cpu_relax() -#define arch_write_relax(lock) cpu_relax() - #endif /* __ASM_SH_SPINLOCK_H */ diff --git a/arch/sh/include/uapi/asm/cpu-features.h b/arch/sh/include/uapi/asm/cpu-features.h index 694abe490edb..2f1bc851042a 100644 --- a/arch/sh/include/uapi/asm/cpu-features.h +++ b/arch/sh/include/uapi/asm/cpu-features.h @@ -22,5 +22,6 @@ #define CPU_HAS_L2_CACHE 0x0080 /* Secondary cache / URAM */ #define CPU_HAS_OP32 0x0100 /* 32-bit instruction support */ #define CPU_HAS_PTEAEX 0x0200 /* PTE ASID Extension support */ +#define CPU_HAS_CAS_L 0x0400 /* cas.l atomic compare-and-swap */ #endif /* __ASM_SH_CPU_FEATURES_H */ diff --git a/arch/sh/include/uapi/asm/sigcontext.h b/arch/sh/include/uapi/asm/sigcontext.h index 8ce1435bc0bf..faa5d0833412 100644 --- a/arch/sh/include/uapi/asm/sigcontext.h +++ b/arch/sh/include/uapi/asm/sigcontext.h @@ -25,8 +25,6 @@ struct sigcontext { unsigned long sc_mach; unsigned long sc_macl; -#if defined(__SH4__) || defined(CONFIG_CPU_SH4) || \ - defined(__SH2A__) || defined(CONFIG_CPU_SH2A) /* FPU registers */ unsigned long sc_fpregs[16]; unsigned long sc_xfpregs[16]; @@ -34,7 +32,6 @@ struct sigcontext { unsigned int sc_fpul; unsigned int sc_ownedfp; #endif -#endif }; #endif /* __ASM_SH_SIGCONTEXT_H */ diff --git a/arch/sh/include/uapi/asm/unistd_32.h b/arch/sh/include/uapi/asm/unistd_32.h index d13a1d623736..c801bde9e6f5 100644 --- a/arch/sh/include/uapi/asm/unistd_32.h +++ b/arch/sh/include/uapi/asm/unistd_32.h @@ -380,7 +380,21 @@ #define __NR_process_vm_writev 366 #define __NR_kcmp 367 #define __NR_finit_module 368 +#define __NR_sched_getattr 369 +#define __NR_sched_setattr 370 +#define __NR_renameat2 371 +#define __NR_seccomp 372 +#define __NR_getrandom 373 +#define __NR_memfd_create 374 +#define __NR_bpf 375 +#define __NR_execveat 376 +#define __NR_userfaultfd 377 +#define __NR_membarrier 378 +#define __NR_mlock2 379 +#define __NR_copy_file_range 380 +#define __NR_preadv2 381 +#define __NR_pwritev2 382 -#define NR_syscalls 369 +#define NR_syscalls 383 #endif /* __ASM_SH_UNISTD_32_H */ diff --git a/arch/sh/include/uapi/asm/unistd_64.h b/arch/sh/include/uapi/asm/unistd_64.h index 47ebd5b5ed55..ce0cb3598b62 100644 --- a/arch/sh/include/uapi/asm/unistd_64.h +++ b/arch/sh/include/uapi/asm/unistd_64.h @@ -400,7 +400,21 @@ #define __NR_process_vm_writev 377 #define __NR_kcmp 378 #define __NR_finit_module 379 +#define __NR_sched_getattr 380 +#define __NR_sched_setattr 381 +#define __NR_renameat2 382 +#define __NR_seccomp 383 +#define __NR_getrandom 384 +#define __NR_memfd_create 385 +#define __NR_bpf 386 +#define __NR_execveat 387 +#define __NR_userfaultfd 388 +#define __NR_membarrier 389 +#define __NR_mlock2 390 +#define __NR_copy_file_range 391 +#define __NR_preadv2 392 +#define __NR_pwritev2 393 -#define NR_syscalls 380 +#define NR_syscalls 394 #endif /* __ASM_SH_UNISTD_64_H */ diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c index 4187cf4fe185..fca9b1e78a63 100644 --- a/arch/sh/kernel/cpu/clock.c +++ b/arch/sh/kernel/cpu/clock.c @@ -24,11 +24,13 @@ int __init clk_init(void) { int ret; +#ifndef CONFIG_COMMON_CLK ret = arch_clk_init(); if (unlikely(ret)) { pr_err("%s: CPU clock registration failed.\n", __func__); return ret; } +#endif if (sh_mv.mv_clk_init) { ret = sh_mv.mv_clk_init(); @@ -39,11 +41,13 @@ int __init clk_init(void) } } +#ifndef CONFIG_COMMON_CLK /* Kick the child clocks.. */ recalculate_root_clocks(); /* Enable the necessary init clocks */ clk_enable_init_clocks(); +#endif return ret; } diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c index 0d7360d549c1..c8b3be1b54e6 100644 --- a/arch/sh/kernel/cpu/init.c +++ b/arch/sh/kernel/cpu/init.c @@ -106,7 +106,7 @@ void __attribute__ ((weak)) l2_cache_init(void) /* * Generic first-level cache init */ -#ifdef CONFIG_SUPERH32 +#if defined(CONFIG_SUPERH32) && !defined(CONFIG_CPU_J2) static void cache_init(void) { unsigned long ccr, flags; @@ -323,9 +323,13 @@ asmlinkage void cpu_init(void) cache_init(); if (raw_smp_processor_id() == 0) { +#ifdef CONFIG_MMU shm_align_mask = max_t(unsigned long, current_cpu_data.dcache.way_size - 1, PAGE_SIZE - 1); +#else + shm_align_mask = PAGE_SIZE - 1; +#endif /* Boot CPU sets the cache shape */ detect_cache_shape(); diff --git a/arch/sh/kernel/cpu/proc.c b/arch/sh/kernel/cpu/proc.c index 9e6624c9108b..4df4b284f591 100644 --- a/arch/sh/kernel/cpu/proc.c +++ b/arch/sh/kernel/cpu/proc.c @@ -27,6 +27,7 @@ static const char *cpu_name[] = { [CPU_MXG] = "MX-G", [CPU_SH7723] = "SH7723", [CPU_SH7366] = "SH7366", [CPU_SH7724] = "SH7724", [CPU_SH7372] = "SH7372", [CPU_SH7734] = "SH7734", + [CPU_J2] = "J2", [CPU_SH_NONE] = "Unknown" }; diff --git a/arch/sh/kernel/cpu/sh2/Makefile b/arch/sh/kernel/cpu/sh2/Makefile index f0f059acfcfb..904c4283d923 100644 --- a/arch/sh/kernel/cpu/sh2/Makefile +++ b/arch/sh/kernel/cpu/sh2/Makefile @@ -5,3 +5,7 @@ obj-y := ex.o probe.o entry.o obj-$(CONFIG_CPU_SUBTYPE_SH7619) += setup-sh7619.o clock-sh7619.o + +# SMP setup +smp-$(CONFIG_CPU_J2) := smp-j2.o +obj-$(CONFIG_SMP) += $(smp-y) diff --git a/arch/sh/kernel/cpu/sh2/entry.S b/arch/sh/kernel/cpu/sh2/entry.S index a1505956ef28..1ee0a6e774c6 100644 --- a/arch/sh/kernel/cpu/sh2/entry.S +++ b/arch/sh/kernel/cpu/sh2/entry.S @@ -47,6 +47,13 @@ ENTRY(exception_handler) mov.l r3,@-sp cli mov.l $cpu_mode,r2 +#ifdef CONFIG_SMP + mov.l $cpuid,r3 + mov.l @r3,r3 + mov.l @r3,r3 + shll2 r3 + add r3,r2 +#endif mov.l @r2,r0 mov.l @(5*4,r15),r3 ! previous SR or r0,r3 ! set MD @@ -57,6 +64,13 @@ ENTRY(exception_handler) mov.l __md_bit,r0 mov.l r0,@r2 ! enter kernel mode mov.l $current_thread_info,r2 +#ifdef CONFIG_SMP + mov.l $cpuid,r0 + mov.l @r0,r0 + mov.l @r0,r0 + shll2 r0 + add r0,r2 +#endif mov.l @r2,r2 mov #(THREAD_SIZE >> 8),r0 shll8 r0 @@ -147,6 +161,11 @@ ENTRY(exception_handler) mov #31,r8 cmp/hs r8,r9 bt trap_entry ! 64 > vec >= 31 is trap +#ifdef CONFIG_CPU_J2 + mov #16,r8 + cmp/hs r8,r9 + bt interrupt_entry ! 31 > vec >= 16 is interrupt +#endif mov.l 4f,r8 mov r9,r4 @@ -260,6 +279,13 @@ restore_all: lds.l @r0+,macl mov r15,r0 mov.l $cpu_mode,r2 +#ifdef CONFIG_SMP + mov.l $cpuid,r3 + mov.l @r3,r3 + mov.l @r3,r3 + shll2 r3 + add r3,r2 +#endif mov #OFF_SR,r3 mov.l @(r0,r3),r1 mov.l __md_bit,r3 @@ -276,6 +302,13 @@ restore_all: mov.l r1,@r2 ! set pc get_current_thread_info r0, r1 mov.l $current_thread_info,r1 +#ifdef CONFIG_SMP + mov.l $cpuid,r3 + mov.l @r3,r3 + mov.l @r3,r3 + shll2 r3 + add r3,r1 +#endif mov.l r0,@r1 mov.l @r15+,r0 mov.l @r15+,r1 @@ -303,19 +336,41 @@ $current_thread_info: .long __current_thread_info $cpu_mode: .long __cpu_mode +#ifdef CONFIG_SMP +$cpuid: + .long sh2_cpuid_addr +#endif ! common exception handler #include "../../entry-common.S" + +#ifdef CONFIG_NR_CPUS +#define NR_CPUS CONFIG_NR_CPUS +#else +#define NR_CPUS 1 +#endif .data ! cpu operation mode ! bit30 = MD (compatible SH3/4) __cpu_mode: + .rept NR_CPUS .long 0x40000000 + .endr + +#ifdef CONFIG_SMP +.global sh2_cpuid_addr +sh2_cpuid_addr: + .long dummy_cpuid +dummy_cpuid: + .long 0 +#endif .section .bss __current_thread_info: + .rept NR_CPUS .long 0 + .endr ENTRY(exception_handling_table) .space 4*32 diff --git a/arch/sh/kernel/cpu/sh2/probe.c b/arch/sh/kernel/cpu/sh2/probe.c index 6c687ae812ef..4205f6d42b69 100644 --- a/arch/sh/kernel/cpu/sh2/probe.c +++ b/arch/sh/kernel/cpu/sh2/probe.c @@ -10,10 +10,27 @@ * for more details. */ #include <linux/init.h> +#include <linux/of_fdt.h> +#include <linux/smp.h> +#include <linux/io.h> #include <asm/processor.h> #include <asm/cache.h> -void cpu_probe(void) +#if defined(CONFIG_CPU_J2) +extern u32 __iomem *j2_ccr_base; +static int __init scan_cache(unsigned long node, const char *uname, + int depth, void *data) +{ + if (!of_flat_dt_is_compatible(node, "jcore,cache")) + return 0; + + j2_ccr_base = (u32 __iomem *)of_flat_dt_translate_address(node); + + return 1; +} +#endif + +void __ref cpu_probe(void) { #if defined(CONFIG_CPU_SUBTYPE_SH7619) boot_cpu_data.type = CPU_SH7619; @@ -24,10 +41,30 @@ void cpu_probe(void) boot_cpu_data.dcache.linesz = L1_CACHE_BYTES; boot_cpu_data.dcache.flags = 0; #endif + +#if defined(CONFIG_CPU_J2) + unsigned cpu = hard_smp_processor_id(); + if (cpu == 0) of_scan_flat_dt(scan_cache, NULL); + if (j2_ccr_base) __raw_writel(0x80000303, j2_ccr_base + 4*cpu); + if (cpu != 0) return; + boot_cpu_data.type = CPU_J2; + + /* These defaults are appropriate for the original/current + * J2 cache. Once there is a proper framework for getting cache + * info from device tree, we should switch to that. */ + boot_cpu_data.dcache.ways = 1; + boot_cpu_data.dcache.sets = 256; + boot_cpu_data.dcache.entry_shift = 5; + boot_cpu_data.dcache.linesz = 32; + boot_cpu_data.dcache.flags = 0; + + boot_cpu_data.flags |= CPU_HAS_CAS_L; +#else /* * SH-2 doesn't have separate caches */ boot_cpu_data.dcache.flags |= SH_CACHE_COMBINED; +#endif boot_cpu_data.icache = boot_cpu_data.dcache; boot_cpu_data.family = CPU_FAMILY_SH2; } diff --git a/arch/sh/kernel/cpu/sh2/smp-j2.c b/arch/sh/kernel/cpu/sh2/smp-j2.c new file mode 100644 index 000000000000..6ccd7e4dc008 --- /dev/null +++ b/arch/sh/kernel/cpu/sh2/smp-j2.c @@ -0,0 +1,139 @@ +/* + * SMP support for J2 processor + * + * Copyright (C) 2015-2016 Smart Energy Instruments, Inc. + * + * 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. + */ + +#include <linux/smp.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <asm/cmpxchg.h> + +DEFINE_PER_CPU(unsigned, j2_ipi_messages); + +extern u32 *sh2_cpuid_addr; +static u32 *j2_ipi_trigger; +static int j2_ipi_irq; + +static irqreturn_t j2_ipi_interrupt_handler(int irq, void *arg) +{ + unsigned cpu = hard_smp_processor_id(); + volatile unsigned *pmsg = &per_cpu(j2_ipi_messages, cpu); + unsigned messages, i; + + do messages = *pmsg; + while (cmpxchg(pmsg, messages, 0) != messages); + + if (!messages) return IRQ_NONE; + + for (i=0; i<SMP_MSG_NR; i++) + if (messages & (1U<<i)) + smp_message_recv(i); + + return IRQ_HANDLED; +} + +static void j2_smp_setup(void) +{ +} + +static void j2_prepare_cpus(unsigned int max_cpus) +{ + struct device_node *np; + unsigned i, max = 1; + + np = of_find_compatible_node(NULL, NULL, "jcore,ipi-controller"); + if (!np) + goto out; + + j2_ipi_irq = irq_of_parse_and_map(np, 0); + j2_ipi_trigger = of_iomap(np, 0); + if (!j2_ipi_irq || !j2_ipi_trigger) + goto out; + + np = of_find_compatible_node(NULL, NULL, "jcore,cpuid-mmio"); + if (!np) + goto out; + + sh2_cpuid_addr = of_iomap(np, 0); + if (!sh2_cpuid_addr) + goto out; + + if (request_irq(j2_ipi_irq, j2_ipi_interrupt_handler, IRQF_PERCPU, + "ipi", (void *)j2_ipi_interrupt_handler) != 0) + goto out; + + max = max_cpus; +out: + /* Disable any cpus past max_cpus, or all secondaries if we didn't + * get the necessary resources to support SMP. */ + for (i=max; i<NR_CPUS; i++) { + set_cpu_possible(i, false); + set_cpu_present(i, false); + } +} + +static void j2_start_cpu(unsigned int cpu, unsigned long entry_point) +{ + struct device_node *np; + u32 regs[2]; + void __iomem *release, *initpc; + + if (!cpu) return; + + np = of_get_cpu_node(cpu, NULL); + if (!np) return; + + if (of_property_read_u32_array(np, "cpu-release-addr", regs, 2)) return; + release = ioremap_nocache(regs[0], sizeof(u32)); + initpc = ioremap_nocache(regs[1], sizeof(u32)); + + __raw_writel(entry_point, initpc); + __raw_writel(1, release); + + iounmap(initpc); + iounmap(release); + + pr_info("J2 SMP: requested start of cpu %u\n", cpu); +} + +static unsigned int j2_smp_processor_id(void) +{ + return __raw_readl(sh2_cpuid_addr); +} + +static void j2_send_ipi(unsigned int cpu, unsigned int message) +{ + volatile unsigned *pmsg; + unsigned old; + unsigned long val; + + /* There is only one IPI interrupt shared by all messages, so + * we keep a separate interrupt flag per message type in sw. */ + pmsg = &per_cpu(j2_ipi_messages, cpu); + do old = *pmsg; + while (cmpxchg(pmsg, old, old|(1U<<message)) != old); + + /* Generate the actual interrupt by writing to CCRn bit 28. */ + val = __raw_readl(j2_ipi_trigger + cpu); + __raw_writel(val | (1U<<28), j2_ipi_trigger + cpu); +} + +static struct plat_smp_ops j2_smp_ops = { + .smp_setup = j2_smp_setup, + .prepare_cpus = j2_prepare_cpus, + .start_cpu = j2_start_cpu, + .smp_processor_id = j2_smp_processor_id, + .send_ipi = j2_send_ipi, + .cpu_die = native_cpu_die, + .cpu_disable = native_cpu_disable, + .play_dead = native_play_dead, +}; + +CPU_METHOD_OF_DECLARE(j2_cpu_method, "jcore,spin-table", &j2_smp_ops); diff --git a/arch/sh/kernel/dma-nommu.c b/arch/sh/kernel/dma-nommu.c index 5b0bfcda6d0b..eadb669a7329 100644 --- a/arch/sh/kernel/dma-nommu.c +++ b/arch/sh/kernel/dma-nommu.c @@ -13,7 +13,7 @@ static dma_addr_t nommu_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, - struct dma_attrs *attrs) + unsigned long attrs) { dma_addr_t addr = page_to_phys(page) + offset; @@ -25,7 +25,7 @@ static dma_addr_t nommu_map_page(struct device *dev, struct page *page, static int nommu_map_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir, - struct dma_attrs *attrs) + unsigned long attrs) { struct scatterlist *s; int i; diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c index 9d209a07235e..e1d751ae2498 100644 --- a/arch/sh/kernel/dwarf.c +++ b/arch/sh/kernel/dwarf.c @@ -1009,10 +1009,8 @@ static void __init dwarf_unwinder_cleanup(void) rbtree_postorder_for_each_entry_safe(cie, next_cie, &cie_root, node) kfree(cie); - if (dwarf_reg_pool) - mempool_destroy(dwarf_reg_pool); - if (dwarf_frame_pool) - mempool_destroy(dwarf_frame_pool); + mempool_destroy(dwarf_reg_pool); + mempool_destroy(dwarf_frame_pool); kmem_cache_destroy(dwarf_reg_cachep); kmem_cache_destroy(dwarf_frame_cachep); } diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S index 974bc152cc84..4e352c3f79e6 100644 --- a/arch/sh/kernel/head_32.S +++ b/arch/sh/kernel/head_32.S @@ -67,7 +67,7 @@ ENTRY(_stext) ldc r0, r6_bank #endif -#ifdef CONFIG_OF +#ifdef CONFIG_OF_FLATTREE mov r4, r12 ! Store device tree blob pointer in r12 #endif @@ -318,7 +318,7 @@ ENTRY(_stext) 10: #endif -#ifdef CONFIG_OF +#ifdef CONFIG_OF_FLATTREE mov.l 8f, r0 ! Make flat device tree available early. jsr @r0 mov r12, r4 @@ -349,7 +349,7 @@ ENTRY(stack_start) 5: .long start_kernel 6: .long cpu_init 7: .long init_thread_union -#if defined(CONFIG_OF) +#if defined(CONFIG_OF_FLATTREE) 8: .long sh_fdt_init #endif diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 5d34605b58b5..e7b49d81053e 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -242,7 +242,7 @@ void __init __weak plat_early_device_setup(void) { } -#ifdef CONFIG_OF +#ifdef CONFIG_OF_FLATTREE void __ref sh_fdt_init(phys_addr_t dt_phys) { static int done = 0; @@ -251,7 +251,11 @@ void __ref sh_fdt_init(phys_addr_t dt_phys) /* Avoid calling an __init function on secondary cpus. */ if (done) return; +#ifdef CONFIG_USE_BUILTIN_DTB + dt_virt = __dtb_start; +#else dt_virt = phys_to_virt(dt_phys); +#endif if (!dt_virt || !early_init_dt_scan(dt_virt)) { pr_crit("Error: invalid device tree blob" diff --git a/arch/sh/kernel/syscalls_32.S b/arch/sh/kernel/syscalls_32.S index 734234be2f01..254bc22ee57d 100644 --- a/arch/sh/kernel/syscalls_32.S +++ b/arch/sh/kernel/syscalls_32.S @@ -386,3 +386,17 @@ ENTRY(sys_call_table) .long sys_process_vm_writev .long sys_kcmp .long sys_finit_module + .long sys_sched_getattr + .long sys_sched_setattr /* 370 */ + .long sys_renameat2 + .long sys_seccomp + .long sys_getrandom + .long sys_memfd_create + .long sys_bpf /* 375 */ + .long sys_execveat + .long sys_userfaultfd + .long sys_membarrier + .long sys_mlock2 + .long sys_copy_file_range /* 380 */ + .long sys_preadv2 + .long sys_pwritev2 diff --git a/arch/sh/kernel/syscalls_64.S b/arch/sh/kernel/syscalls_64.S index 579fcb9a896b..d6a27f7a4c54 100644 --- a/arch/sh/kernel/syscalls_64.S +++ b/arch/sh/kernel/syscalls_64.S @@ -406,3 +406,17 @@ sys_call_table: .long sys_process_vm_writev .long sys_kcmp .long sys_finit_module + .long sys_sched_getattr /* 380 */ + .long sys_sched_setattr + .long sys_renameat2 + .long sys_seccomp + .long sys_getrandom + .long sys_memfd_create /* 385 */ + .long sys_bpf + .long sys_execveat + .long sys_userfaultfd + .long sys_membarrier + .long sys_mlock2 /* 390 */ + .long sys_copy_file_range + .long sys_preadv2 + .long sys_pwritev2 diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c index d6d0a986c6e9..fcd5e41977d1 100644 --- a/arch/sh/kernel/time.c +++ b/arch/sh/kernel/time.c @@ -11,7 +11,6 @@ * for more details. */ #include <linux/kernel.h> -#include <linux/module.h> #include <linux/init.h> #include <linux/profile.h> #include <linux/timex.h> @@ -50,27 +49,31 @@ int update_persistent_clock(struct timespec now) } #endif -unsigned int get_rtc_time(struct rtc_time *tm) +static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm) { - if (rtc_sh_get_time != null_rtc_get_time) { - struct timespec tv; + struct timespec tv; - rtc_sh_get_time(&tv); - rtc_time_to_tm(tv.tv_sec, tm); - } - - return RTC_24H; + rtc_sh_get_time(&tv); + rtc_time_to_tm(tv.tv_sec, tm); + return 0; } -EXPORT_SYMBOL(get_rtc_time); -int set_rtc_time(struct rtc_time *tm) +static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm) { unsigned long secs; rtc_tm_to_time(tm, &secs); - return rtc_sh_set_time(secs); + if ((rtc_sh_set_time == null_rtc_set_time) || + (rtc_sh_set_time(secs) < 0)) + return -EOPNOTSUPP; + + return 0; } -EXPORT_SYMBOL(set_rtc_time); + +static const struct rtc_class_ops rtc_generic_ops = { + .read_time = rtc_generic_get_time, + .set_time = rtc_generic_set_time, +}; static int __init rtc_generic_init(void) { @@ -79,11 +82,14 @@ static int __init rtc_generic_init(void) if (rtc_sh_get_time == null_rtc_get_time) return -ENODEV; - pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0); + pdev = platform_device_register_data(NULL, "rtc-generic", -1, + &rtc_generic_ops, + sizeof(rtc_generic_ops)); + return PTR_ERR_OR_ZERO(pdev); } -module_init(rtc_generic_init); +device_initcall(rtc_generic_init); void (*board_time_init)(void); diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile index cee6b9999d86..92c3bd96aee5 100644 --- a/arch/sh/mm/Makefile +++ b/arch/sh/mm/Makefile @@ -4,7 +4,8 @@ obj-y := alignment.o cache.o init.o consistent.o mmap.o -cacheops-$(CONFIG_CPU_SH2) := cache-sh2.o +cacheops-$(CONFIG_CPU_J2) := cache-j2.o +cacheops-$(CONFIG_CPU_SUBTYPE_SH7619) := cache-sh2.o cacheops-$(CONFIG_CPU_SH2A) := cache-sh2a.o cacheops-$(CONFIG_CPU_SH3) := cache-sh3.o cacheops-$(CONFIG_CPU_SH4) := cache-sh4.o flush-sh4.o diff --git a/arch/sh/mm/asids-debugfs.c b/arch/sh/mm/asids-debugfs.c index ecfc6b0c1da1..bf95fdaedd0c 100644 --- a/arch/sh/mm/asids-debugfs.c +++ b/arch/sh/mm/asids-debugfs.c @@ -17,7 +17,6 @@ * for more details. */ #include <linux/init.h> -#include <linux/module.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <linux/spinlock.h> @@ -70,6 +69,4 @@ static int __init asids_debugfs_init(void) return PTR_ERR_OR_ZERO(asids_dentry); } -module_init(asids_debugfs_init); - -MODULE_LICENSE("GPL v2"); +device_initcall(asids_debugfs_init); diff --git a/arch/sh/mm/cache-j2.c b/arch/sh/mm/cache-j2.c new file mode 100644 index 000000000000..391698bcac5b --- /dev/null +++ b/arch/sh/mm/cache-j2.c @@ -0,0 +1,65 @@ +/* + * arch/sh/mm/cache-j2.c + * + * Copyright (C) 2015-2016 Smart Energy Instruments, Inc. + * + * Released under the terms of the GNU GPL v2.0. + */ + +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/cpumask.h> + +#include <asm/cache.h> +#include <asm/addrspace.h> +#include <asm/processor.h> +#include <asm/cacheflush.h> +#include <asm/io.h> + +#define ICACHE_ENABLE 0x1 +#define DCACHE_ENABLE 0x2 +#define CACHE_ENABLE (ICACHE_ENABLE | DCACHE_ENABLE) +#define ICACHE_FLUSH 0x100 +#define DCACHE_FLUSH 0x200 +#define CACHE_FLUSH (ICACHE_FLUSH | DCACHE_FLUSH) + +u32 __iomem *j2_ccr_base; + +static void j2_flush_icache(void *args) +{ + unsigned cpu; + for_each_possible_cpu(cpu) + __raw_writel(CACHE_ENABLE | ICACHE_FLUSH, j2_ccr_base + cpu); +} + +static void j2_flush_dcache(void *args) +{ + unsigned cpu; + for_each_possible_cpu(cpu) + __raw_writel(CACHE_ENABLE | DCACHE_FLUSH, j2_ccr_base + cpu); +} + +static void j2_flush_both(void *args) +{ + unsigned cpu; + for_each_possible_cpu(cpu) + __raw_writel(CACHE_ENABLE | CACHE_FLUSH, j2_ccr_base + cpu); +} + +void __init j2_cache_init(void) +{ + if (!j2_ccr_base) + return; + + local_flush_cache_all = j2_flush_both; + local_flush_cache_mm = j2_flush_both; + local_flush_cache_dup_mm = j2_flush_both; + local_flush_cache_page = j2_flush_both; + local_flush_cache_range = j2_flush_both; + local_flush_dcache_page = j2_flush_dcache; + local_flush_icache_range = j2_flush_icache; + local_flush_icache_page = j2_flush_icache; + local_flush_cache_sigtramp = j2_flush_icache; + + pr_info("Initial J2 CCR is %.8x\n", __raw_readl(j2_ccr_base)); +} diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c index e58cfbf45150..36554a9ea99b 100644 --- a/arch/sh/mm/cache.c +++ b/arch/sh/mm/cache.c @@ -42,6 +42,8 @@ static inline void cacheop_on_each_cpu(void (*func) (void *info), void *info, { preempt_disable(); + /* Needing IPI for cross-core flush is SHX3-specific. */ +#ifdef CONFIG_CPU_SHX3 /* * It's possible that this gets called early on when IRQs are * still disabled due to ioremapping by the boot CPU, so don't @@ -49,6 +51,7 @@ static inline void cacheop_on_each_cpu(void (*func) (void *info), void *info, */ if (num_online_cpus() > 1) smp_call_function(func, info, wait); +#endif func(info); @@ -244,7 +247,11 @@ void flush_cache_sigtramp(unsigned long address) static void compute_alias(struct cache_info *c) { +#ifdef CONFIG_MMU c->alias_mask = ((c->sets - 1) << c->entry_shift) & ~(PAGE_SIZE - 1); +#else + c->alias_mask = 0; +#endif c->n_aliases = c->alias_mask ? (c->alias_mask >> PAGE_SHIFT) + 1 : 0; } @@ -305,7 +312,11 @@ void __init cpu_cache_init(void) if (unlikely(cache_disabled)) goto skip; - if (boot_cpu_data.family == CPU_FAMILY_SH2) { + if (boot_cpu_data.type == CPU_J2) { + extern void __weak j2_cache_init(void); + + j2_cache_init(); + } else if (boot_cpu_data.family == CPU_FAMILY_SH2) { extern void __weak sh2_cache_init(void); sh2_cache_init(); diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c index b81d9dbf9fef..92b6976fde59 100644 --- a/arch/sh/mm/consistent.c +++ b/arch/sh/mm/consistent.c @@ -34,7 +34,7 @@ fs_initcall(dma_init); void *dma_generic_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, - struct dma_attrs *attrs) + unsigned long attrs) { void *ret, *ret_nocache; int order = get_order(size); @@ -66,7 +66,7 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, void dma_generic_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, - struct dma_attrs *attrs) + unsigned long attrs) { int order = get_order(size); unsigned long pfn = dma_handle >> PAGE_SHIFT; |