Release 4.14 arch/m32r/kernel/sys_m32r.c
// SPDX-License-Identifier: GPL-2.0
/*
* linux/arch/m32r/kernel/sys_m32r.c
*
* This file contains various random system calls that
* have a non-standard calling sequence on the Linux/M32R platform.
*
* Taken from i386 version.
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/fs.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/ipc.h>
#include <linux/uaccess.h>
#include <asm/cachectl.h>
#include <asm/cacheflush.h>
#include <asm/syscall.h>
#include <asm/unistd.h>
/*
* sys_tas() - test-and-set
*/
asmlinkage int sys_tas(int __user *addr)
{
int oldval;
if (!access_ok(VERIFY_WRITE, addr, sizeof (int)))
return -EFAULT;
/* atomic operation:
* oldval = *addr; *addr = 1;
*/
__asm__ __volatile__ (
DCACHE_CLEAR("%0", "r4", "%1")
" .fillinsn\n"
"1:\n"
" lock %0, @%1 -> unlock %2, @%1\n"
"2:\n"
/* NOTE:
* The m32r processor can accept interrupts only
* at the 32-bit instruction boundary.
* So, in the above code, the "unlock" instruction
* can be executed continuously after the "lock"
* instruction execution without any interruptions.
*/
".section .fixup,\"ax\"\n"
" .balign 4\n"
"3: ldi %0, #%3\n"
" seth r14, #high(2b)\n"
" or3 r14, r14, #low(2b)\n"
" jmp r14\n"
".previous\n"
".section __ex_table,\"a\"\n"
" .balign 4\n"
" .long 1b,3b\n"
".previous\n"
: "=&r" (oldval)
: "r" (addr), "r" (1), "i"(-EFAULT)
: "r14", "memory"
#ifdef CONFIG_CHIP_M32700_TS1
, "r4"
#endif /* CONFIG_CHIP_M32700_TS1 */
);
return oldval;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hirokazu Takata | 49 | 98.00% | 2 | 66.67% |
| Al Viro | 1 | 2.00% | 1 | 33.33% |
| Total | 50 | 100.00% | 3 | 100.00% |
asmlinkage int sys_cacheflush(void *addr, int bytes, int cache)
{
/* This should flush more selectively ... */
_flush_cache_all();
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hirokazu Takata | 22 | 95.65% | 1 | 50.00% |
| Simon Arlott | 1 | 4.35% | 1 | 50.00% |
| Total | 23 | 100.00% | 2 | 100.00% |
asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
{
/* Not implemented yet. */
return -ENOSYS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hirokazu Takata | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hirokazu Takata | 141 | 91.56% | 3 | 33.33% |
| Arnd Bergmann | 6 | 3.90% | 1 | 11.11% |
| Adrian Bunk | 3 | 1.95% | 1 | 11.11% |
| Linus Torvalds | 1 | 0.65% | 1 | 11.11% |
| Greg Kroah-Hartman | 1 | 0.65% | 1 | 11.11% |
| Al Viro | 1 | 0.65% | 1 | 11.11% |
| Simon Arlott | 1 | 0.65% | 1 | 11.11% |
| Total | 154 | 100.00% | 9 | 100.00% |
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