diff options
| -rw-r--r-- | arch/tile/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/tile/include/asm/cachectl.h | 42 | ||||
| -rw-r--r-- | arch/tile/include/asm/compat.h | 3 | ||||
| -rw-r--r-- | arch/tile/include/asm/syscalls.h | 3 | ||||
| -rw-r--r-- | arch/tile/include/asm/unistd.h | 4 | ||||
| -rw-r--r-- | arch/tile/kernel/sys.c | 10 |
6 files changed, 55 insertions, 8 deletions
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild index 6b2e681695ec..143473e3a0bb 100644 --- a/arch/tile/include/asm/Kbuild +++ b/arch/tile/include/asm/Kbuild @@ -2,6 +2,7 @@ include include/asm-generic/Kbuild.asm header-y += ../arch/ +header-y += cachectl.h header-y += ucontext.h header-y += hardwall.h diff --git a/arch/tile/include/asm/cachectl.h b/arch/tile/include/asm/cachectl.h new file mode 100644 index 000000000000..af4c9f9154d1 --- /dev/null +++ b/arch/tile/include/asm/cachectl.h @@ -0,0 +1,42 @@ +/* + * Copyright 2011 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef _ASM_TILE_CACHECTL_H +#define _ASM_TILE_CACHECTL_H + +/* + * Options for cacheflush system call. + * + * The ICACHE flush is performed on all cores currently running the + * current process's address space. The intent is for user + * applications to be able to modify code, invoke the system call, + * then allow arbitrary other threads in the same address space to see + * the newly-modified code. Passing a length of CHIP_L1I_CACHE_SIZE() + * or more invalidates the entire icache on all cores in the address + * spaces. (Note: currently this option invalidates the entire icache + * regardless of the requested address and length, but we may choose + * to honor the arguments at some point.) + * + * Flush and invalidation of memory can normally be performed with the + * __insn_flush(), __insn_inv(), and __insn_finv() instructions from + * userspace. The DCACHE option to the system call allows userspace + * to flush the entire L1+L2 data cache from the core. In this case, + * the address and length arguments are not used. The DCACHE flush is + * restricted to the current core, not all cores in the address space. + */ +#define ICACHE (1<<0) /* invalidate L1 instruction cache */ +#define DCACHE (1<<1) /* flush and invalidate data cache */ +#define BCACHE (ICACHE|DCACHE) /* flush both caches */ + +#endif /* _ASM_TILE_CACHECTL_H */ diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h index 4b4b28969a65..69adc08d36a5 100644 --- a/arch/tile/include/asm/compat.h +++ b/arch/tile/include/asm/compat.h @@ -242,9 +242,6 @@ long compat_sys_fallocate(int fd, int mode, long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval); -/* Tilera Linux syscalls that don't have "compat" versions. */ -#define compat_sys_flush_cache sys_flush_cache - /* These are the intvec_64.S trampolines. */ long _compat_sys_execve(const char __user *path, const compat_uptr_t __user *argv, diff --git a/arch/tile/include/asm/syscalls.h b/arch/tile/include/asm/syscalls.h index 3b5507c31eae..06f0464cfed9 100644 --- a/arch/tile/include/asm/syscalls.h +++ b/arch/tile/include/asm/syscalls.h @@ -43,7 +43,8 @@ long sys32_fadvise64(int fd, u32 offset_lo, u32 offset_hi, u32 len, int advice); int sys32_fadvise64_64(int fd, u32 offset_lo, u32 offset_hi, u32 len_lo, u32 len_hi, int advice); -long sys_flush_cache(void); +long sys_cacheflush(unsigned long addr, unsigned long len, + unsigned long flags); #ifndef __tilegx__ /* No mmap() in the 32-bit kernel. */ #define sys_mmap sys_mmap #endif diff --git a/arch/tile/include/asm/unistd.h b/arch/tile/include/asm/unistd.h index f70bf1c541f1..a017246ca0ce 100644 --- a/arch/tile/include/asm/unistd.h +++ b/arch/tile/include/asm/unistd.h @@ -24,8 +24,8 @@ #include <asm-generic/unistd.h> /* Additional Tilera-specific syscalls. */ -#define __NR_flush_cache (__NR_arch_specific_syscall + 1) -__SYSCALL(__NR_flush_cache, sys_flush_cache) +#define __NR_cacheflush (__NR_arch_specific_syscall + 1) +__SYSCALL(__NR_cacheflush, sys_cacheflush) #ifndef __tilegx__ /* "Fast" syscalls provide atomic support for 32-bit chips. */ diff --git a/arch/tile/kernel/sys.c b/arch/tile/kernel/sys.c index cb44ba7ccd2d..b08095b402d6 100644 --- a/arch/tile/kernel/sys.c +++ b/arch/tile/kernel/sys.c @@ -32,11 +32,17 @@ #include <asm/syscalls.h> #include <asm/pgtable.h> #include <asm/homecache.h> +#include <asm/cachectl.h> #include <arch/chip.h> -SYSCALL_DEFINE0(flush_cache) +SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, + unsigned long, flags) { - homecache_evict(cpumask_of(smp_processor_id())); + if (flags & DCACHE) + homecache_evict(cpumask_of(smp_processor_id())); + if (flags & ICACHE) + flush_remote(0, HV_FLUSH_EVICT_L1I, mm_cpumask(current->mm), + 0, 0, 0, NULL, NULL, 0); return 0; } |