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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/sh/kernel/sys_sh.c
Initial import
Diffstat (limited to 'arch/sh/kernel/sys_sh.c')
-rw-r--r--arch/sh/kernel/sys_sh.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c
new file mode 100644
index 000000000..8c6a350df
--- /dev/null
+++ b/arch/sh/kernel/sys_sh.c
@@ -0,0 +1,95 @@
+/*
+ * linux/arch/sh/kernel/sys_sh.c
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/SuperH
+ * platform.
+ *
+ * Taken from i386 version.
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/ipc.h>
+#include <asm/syscalls.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+#include <asm/cacheflush.h>
+#include <asm/cachectl.h>
+
+asmlinkage int old_mmap(unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags,
+ int fd, unsigned long off)
+{
+ if (off & ~PAGE_MASK)
+ return -EINVAL;
+ return sys_mmap_pgoff(addr, len, prot, flags, fd, off>>PAGE_SHIFT);
+}
+
+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);
+}
+
+/* sys_cacheflush -- flush (part of) the processor cache. */
+asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
+{
+ struct vm_area_struct *vma;
+
+ if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
+ return -EINVAL;
+
+ /*
+ * Verify that the specified address region actually belongs
+ * to this process.
+ */
+ if (addr + len < addr)
+ return -EFAULT;
+
+ down_read(&current->mm->mmap_sem);
+ vma = find_vma (current->mm, addr);
+ if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) {
+ up_read(&current->mm->mmap_sem);
+ return -EFAULT;
+ }
+
+ switch (op & CACHEFLUSH_D_PURGE) {
+ case CACHEFLUSH_D_INVAL:
+ __flush_invalidate_region((void *)addr, len);
+ break;
+ case CACHEFLUSH_D_WB:
+ __flush_wback_region((void *)addr, len);
+ break;
+ case CACHEFLUSH_D_PURGE:
+ __flush_purge_region((void *)addr, len);
+ break;
+ }
+
+ if (op & CACHEFLUSH_I)
+ flush_icache_range(addr, addr+len);
+
+ up_read(&current->mm->mmap_sem);
+ return 0;
+}