diff options
Diffstat (limited to 'arch/metag/kernel/sys_metag.c')
| -rw-r--r-- | arch/metag/kernel/sys_metag.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/arch/metag/kernel/sys_metag.c b/arch/metag/kernel/sys_metag.c deleted file mode 100644 index 27d96499dd38..000000000000 --- a/arch/metag/kernel/sys_metag.c +++ /dev/null @@ -1,181 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * This file contains various random system calls that - * have a non-standard calling sequence on the Linux/Meta - * platform. - */ - -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/syscalls.h> -#include <linux/mman.h> -#include <linux/file.h> -#include <linux/fs.h> -#include <linux/uaccess.h> -#include <linux/unistd.h> -#include <asm/cacheflush.h> -#include <asm/core_reg.h> -#include <asm/global_lock.h> -#include <asm/switch.h> -#include <asm/syscall.h> -#include <asm/syscalls.h> -#include <asm/user_gateway.h> - -#define merge_64(hi, lo) ((((unsigned long long)(hi)) << 32) + \ - ((lo) & 0xffffffffUL)) - -int metag_mmap_check(unsigned long addr, unsigned long len, - unsigned long flags) -{ - /* We can't have people trying to write to the bottom of the - * memory map, there are mysterious unspecified things there that - * we don't want people trampling on. - */ - if ((flags & MAP_FIXED) && (addr < TASK_UNMAPPED_BASE)) - return -EINVAL; - - return 0; -} - -asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, - unsigned long prot, unsigned long flags, - unsigned long fd, unsigned long pgoff) -{ - /* The shift for mmap2 is constant, regardless of PAGE_SIZE setting. */ - if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1)) - return -EINVAL; - - pgoff >>= PAGE_SHIFT - 12; - - return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); -} - -asmlinkage int sys_metag_setglobalbit(char __user *addr, int mask) -{ - char tmp; - int ret = 0; - unsigned int flags; - - if (!((__force unsigned int)addr >= LINCORE_BASE)) - return -EFAULT; - - __global_lock2(flags); - - metag_data_cache_flush((__force void *)addr, sizeof(mask)); - - ret = __get_user(tmp, addr); - if (ret) - goto out; - tmp |= mask; - ret = __put_user(tmp, addr); - - metag_data_cache_flush((__force void *)addr, sizeof(mask)); - -out: - __global_unlock2(flags); - - return ret; -} - -#define TXDEFR_FPU_MASK ((0x1f << 16) | 0x1f) - -asmlinkage void sys_metag_set_fpu_flags(unsigned int flags) -{ - unsigned int temp; - - flags &= TXDEFR_FPU_MASK; - - temp = __core_reg_get(TXDEFR); - temp &= ~TXDEFR_FPU_MASK; - temp |= flags; - __core_reg_set(TXDEFR, temp); -} - -asmlinkage int sys_metag_set_tls(void __user *ptr) -{ - current->thread.tls_ptr = ptr; - set_gateway_tls(ptr); - - return 0; -} - -asmlinkage void *sys_metag_get_tls(void) -{ - return (__force void *)current->thread.tls_ptr; -} - -asmlinkage long sys_truncate64_metag(const char __user *path, unsigned long lo, - unsigned long hi) -{ - return sys_truncate64(path, merge_64(hi, lo)); -} - -asmlinkage long sys_ftruncate64_metag(unsigned int fd, unsigned long lo, - unsigned long hi) -{ - return sys_ftruncate64(fd, merge_64(hi, lo)); -} - -asmlinkage long sys_fadvise64_64_metag(int fd, unsigned long offs_lo, - unsigned long offs_hi, - unsigned long len_lo, - unsigned long len_hi, int advice) -{ - return sys_fadvise64_64(fd, merge_64(offs_hi, offs_lo), - merge_64(len_hi, len_lo), advice); -} - -asmlinkage long sys_readahead_metag(int fd, unsigned long lo, unsigned long hi, - size_t count) -{ - return sys_readahead(fd, merge_64(hi, lo), count); -} - -asmlinkage ssize_t sys_pread64_metag(unsigned long fd, char __user *buf, - size_t count, unsigned long lo, - unsigned long hi) -{ - return sys_pread64(fd, buf, count, merge_64(hi, lo)); -} - -asmlinkage ssize_t sys_pwrite64_metag(unsigned long fd, char __user *buf, - size_t count, unsigned long lo, - unsigned long hi) -{ - return sys_pwrite64(fd, buf, count, merge_64(hi, lo)); -} - -asmlinkage long sys_sync_file_range_metag(int fd, unsigned long offs_lo, - unsigned long offs_hi, - unsigned long len_lo, - unsigned long len_hi, - unsigned int flags) -{ - return sys_sync_file_range(fd, merge_64(offs_hi, offs_lo), - merge_64(len_hi, len_lo), flags); -} - -/* Provide the actual syscall number to call mapping. */ -#undef __SYSCALL -#define __SYSCALL(nr, call) [nr] = (call), - -/* - * We need wrappers for anything with unaligned 64bit arguments - */ -#define sys_truncate64 sys_truncate64_metag -#define sys_ftruncate64 sys_ftruncate64_metag -#define sys_fadvise64_64 sys_fadvise64_64_metag -#define sys_readahead sys_readahead_metag -#define sys_pread64 sys_pread64_metag -#define sys_pwrite64 sys_pwrite64_metag -#define sys_sync_file_range sys_sync_file_range_metag - -/* - * 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. - */ -const void *sys_call_table[__NR_syscalls] = { - [0 ... __NR_syscalls-1] = sys_ni_syscall, -#include <asm/unistd.h> -}; |