Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / c6x / kernel / sys_c6x.c

diff --git a/kernel/arch/c6x/kernel/sys_c6x.c b/kernel/arch/c6x/kernel/sys_c6x.c
new file mode 100644 (file)
index 0000000..3e9bdfb
--- /dev/null
+++ b/kernel/arch/c6x/kernel/sys_c6x.c
@@ -0,0 +1,74 @@
+/*
+ *  Port on Texas Instruments TMS320C6x architecture
+ *
+ *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.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.
+ */
+#include <linux/module.h>
+#include <linux/syscalls.h>
+#include <linux/uaccess.h>
+
+#include <asm/syscalls.h>
+
+#ifdef CONFIG_ACCESS_CHECK
+int _access_ok(unsigned long addr, unsigned long size)
+{
+       if (!size)
+               return 1;
+
+       if (!addr || addr > (0xffffffffUL - (size - 1)))
+               goto _bad_access;
+
+       if (segment_eq(get_fs(), KERNEL_DS))
+               return 1;
+
+       if (memory_start <= addr && (addr + size - 1) < memory_end)
+               return 1;
+
+_bad_access:
+       pr_debug("Bad access attempt: pid[%d] addr[%08lx] size[0x%lx]\n",
+                current->pid, addr, size);
+       return 0;
+}
+EXPORT_SYMBOL(_access_ok);
+#endif
+
+/* sys_cache_sync -- sync caches over given range */
+asmlinkage int sys_cache_sync(unsigned long s, unsigned long e)
+{
+       L1D_cache_block_writeback_invalidate(s, e);
+       L1P_cache_block_invalidate(s, e);
+
+       return 0;
+}
+
+/* Provide the actual syscall number to call mapping. */
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+/*
+ * Use trampolines
+ */
+#define sys_pread64            sys_pread_c6x
+#define sys_pwrite64           sys_pwrite_c6x
+#define sys_truncate64         sys_truncate64_c6x
+#define sys_ftruncate64                sys_ftruncate64_c6x
+#define sys_fadvise64          sys_fadvise64_c6x
+#define sys_fadvise64_64       sys_fadvise64_64_c6x
+#define sys_fallocate          sys_fallocate_c6x
+
+/* Use sys_mmap_pgoff directly */
+#define sys_mmap2 sys_mmap_pgoff
+
+/*
+ * 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>
+};