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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/sh/kernel/sys_sh.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sh/kernel/sys_sh.c')
-rw-r--r-- | arch/sh/kernel/sys_sh.c | 96 |
1 files changed, 96 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..a5a7b33ed --- /dev/null +++ b/arch/sh/kernel/sys_sh.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * 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 <linux/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 ksys_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 ksys_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; + + mmap_read_lock(current->mm); + vma = find_vma (current->mm, addr); + if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) { + mmap_read_unlock(current->mm); + 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); + + mmap_read_unlock(current->mm); + return 0; +} |