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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-08 10:10:11 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-08 10:10:11 -0700 |
commit | 45d7f32c7a43cbb9592886d38190e379e2eb2226 (patch) | |
tree | ea68b67b1d2127527d856248c0485f2ed7e50088 /arch/tile/kernel/sys.c | |
parent | 53bcef60633086ad73683d01a4ef9ca678484d2d (diff) | |
parent | ab11b487402f97975f3ac1eeea09c82f4431481e (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: check kmalloc() result
arch/tile: catch up on various minor cleanups.
arch/tile: avoid erroneous error return for PTRACE_POKEUSR.
tile: set ARCH_KMALLOC_MINALIGN
tile: remove homegrown L1_CACHE_ALIGN macro
arch/tile: Miscellaneous cleanup changes.
arch/tile: Split the icache flush code off to a generic <arch> header.
arch/tile: Fix bug in support for atomic64_xx() ops.
arch/tile: Shrink the tile-opcode files considerably.
arch/tile: Add driver to enable access to the user dynamic network.
arch/tile: Enable more sophisticated IRQ model for 32-bit chips.
Move list types from <linux/list.h> to <linux/types.h>.
Add wait4() back to the set of <asm-generic/unistd.h> syscalls.
Revert adding some arch-specific signal syscalls to <linux/syscalls.h>.
arch/tile: Do not use GFP_KERNEL for dma_alloc_coherent(). Feedback from fujita.tomonori@lab.ntt.co.jp.
arch/tile: core support for Tilera 32-bit chips.
Fix up the "generic" unistd.h ABI to be more useful.
Diffstat (limited to 'arch/tile/kernel/sys.c')
-rw-r--r-- | arch/tile/kernel/sys.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/arch/tile/kernel/sys.c b/arch/tile/kernel/sys.c new file mode 100644 index 00000000000..f0f87eab8c3 --- /dev/null +++ b/arch/tile/kernel/sys.c @@ -0,0 +1,120 @@ +/* + * Copyright 2010 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. + * + * This file contains various random system calls that + * have a non-standard calling sequence on the Linux/TILE + * platform. + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/syscalls.h> +#include <linux/mman.h> +#include <linux/file.h> +#include <linux/mempolicy.h> +#include <linux/binfmts.h> +#include <linux/fs.h> +#include <linux/compat.h> +#include <linux/uaccess.h> +#include <linux/signal.h> +#include <asm/syscalls.h> +#include <asm/pgtable.h> +#include <asm/homecache.h> +#include <arch/chip.h> + +SYSCALL_DEFINE0(flush_cache) +{ + homecache_evict(cpumask_of(smp_processor_id())); + return 0; +} + +/* + * Syscalls that pass 64-bit values on 32-bit systems normally + * pass them as (low,high) word packed into the immediately adjacent + * registers. If the low word naturally falls on an even register, + * our ABI makes it work correctly; if not, we adjust it here. + * Handling it here means we don't have to fix uclibc AND glibc AND + * any other standard libcs we want to support. + */ + +#if !defined(__tilegx__) || defined(CONFIG_COMPAT) + +ssize_t sys32_readahead(int fd, u32 offset_lo, u32 offset_hi, u32 count) +{ + return sys_readahead(fd, ((loff_t)offset_hi << 32) | offset_lo, count); +} + +long sys32_fadvise64(int fd, u32 offset_lo, u32 offset_hi, + u32 len, int advice) +{ + return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo, + len, advice); +} + +int sys32_fadvise64_64(int fd, u32 offset_lo, u32 offset_hi, + u32 len_lo, u32 len_hi, int advice) +{ + return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo, + ((loff_t)len_hi << 32) | len_lo, advice); +} + +#endif /* 32-bit syscall wrappers */ + +/* Note: used by the compat code even in 64-bit Linux. */ +SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, + unsigned long, fd, unsigned long, off_4k) +{ +#define PAGE_ADJUST (PAGE_SHIFT - 12) + if (off_4k & ((1 << PAGE_ADJUST) - 1)) + return -EINVAL; + return sys_mmap_pgoff(addr, len, prot, flags, fd, + off_4k >> PAGE_ADJUST); +} + +#ifdef __tilegx__ +SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, + unsigned long, fd, off_t, offset) +{ + if (offset & ((1 << PAGE_SHIFT) - 1)) + return -EINVAL; + return sys_mmap_pgoff(addr, len, prot, flags, fd, + offset >> PAGE_SHIFT); +} +#endif + + +/* Provide the actual syscall number to call mapping. */ +#undef __SYSCALL +#define __SYSCALL(nr, call) [nr] = (call), + +#ifndef __tilegx__ +/* See comments at the top of the file. */ +#define sys_fadvise64 sys32_fadvise64 +#define sys_fadvise64_64 sys32_fadvise64_64 +#define sys_readahead sys32_readahead +#define sys_sync_file_range sys_sync_file_range2 +#endif + +/* + * Note that we can't include <linux/unistd.h> here since the header + * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. + */ +void *sys_call_table[__NR_syscalls] = { + [0 ... __NR_syscalls-1] = sys_ni_syscall, +#include <asm/unistd.h> +}; |