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linux-mips-commits
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From: Paul M. <le...@us...> - 2001-10-27 20:52:07
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Update of /cvsroot/linux-mips/linux/arch/mips/kernel
In directory usw-pr-cvs1:/tmp/cvs-serv30758/mips/kernel
Modified Files:
Makefile irix5sys.h scall_o32.S syscalls.h sysmips.c
Log Message:
sysmips syncups.. works fine on ITE board.. more testing probably needed. This
brings us in sync with OSS on sysmips.
Index: Makefile
===================================================================
RCS file: /cvsroot/linux-mips/linux/arch/mips/kernel/Makefile,v
retrieving revision 1.12
retrieving revision 1.13
diff -u -d -r1.12 -r1.13
--- Makefile 2001/10/26 20:00:15 1.12
+++ Makefile 2001/10/27 20:52:05 1.13
@@ -15,10 +15,12 @@
O_TARGET := kernel.o
+export-objs = pci-dma.o smp.o
+
obj-y += branch.o process.o signal.o entry.o \
traps.o ptrace.o vm86.o ioport.o reset.o \
semaphore.o setup.o syscall.o sysmips.o \
- ipc.o scall_o32.o unaligned.o fast-sysmips.o
+ ipc.o scall_o32.o unaligned.o
obj-$(CONFIG_MODULES) += mips_ksyms.o
obj-$(CONFIG_CPU_R3000) += r2300_fpu.o r2300_switch.o
@@ -38,7 +40,6 @@
obj-$(CONFIG_CPU_MIPS64) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R6000) += r6000_fpu.o r4k_switch.o
-export-objs += smp.o
obj-$(CONFIG_SMP) += smp.o
# Old style irq support, going to die in 2.5.
@@ -57,7 +58,6 @@
obj-$(CONFIG_BINFMT_IRIX) += irixelf.o irixioctl.o irixsig.o sysirix.o \
irixinv.o
obj-$(CONFIG_REMOTE_DEBUG) += gdb-low.o gdb-stub.o
-export-objs += pci-dma.o
obj-$(CONFIG_PCI) += pci-dma.o
obj-$(CONFIG_PROC_FS) += proc.o
@@ -68,6 +68,5 @@
entry.o: entry.S
head.o: head.S
-fast-sysmips.o: fast-sysmips.S
include $(TOPDIR)/Rules.make
Index: irix5sys.h
===================================================================
RCS file: /cvsroot/linux-mips/linux/arch/mips/kernel/irix5sys.h,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -d -r1.3 -r1.4
--- irix5sys.h 2001/09/25 03:36:35 1.3
+++ irix5sys.h 2001/10/27 20:52:05 1.4
@@ -68,7 +68,7 @@
SYS(irix_getgid, 0) /* 1047 getgid() V*/
SYS(irix_unimp, 0) /* 1048 (XXX IRIX 4 ssig) V*/
SYS(irix_msgsys, 6) /* 1049 sys_msgsys V*/
-SYS(fast_sysmips, 4) /* 1050 sysmips() HV*/
+SYS(sys_sysmips, 4) /* 1050 sysmips() HV*/
SYS(irix_unimp, 0) /* 1051 XXX sysacct() IV*/
SYS(irix_shmsys, 5) /* 1052 sys_shmsys V*/
SYS(irix_semsys, 0) /* 1053 sys_semsys V*/
Index: scall_o32.S
===================================================================
RCS file: /cvsroot/linux-mips/linux/arch/mips/kernel/scall_o32.S,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -d -r1.5 -r1.6
--- scall_o32.S 2001/09/04 16:43:46 1.5
+++ scall_o32.S 2001/10/27 20:52:05 1.6
@@ -3,7 +3,8 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 1997, 1998, 1999, 2000 by Ralf Baechle
+ * Copyright (C) 1997, 1998, 1999, 2000, 2001 by Ralf Baechle
+ * Copyright (C) 2001 MIPS Technologies, Inc.
*/
#include <asm/asm.h>
#include <linux/errno.h>
@@ -12,6 +13,7 @@
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/isadep.h>
+#include <asm/sysmips.h>
#include <asm/unistd.h>
/* This duplicates the definition from <linux/sched.h> */
@@ -192,3 +194,73 @@
sw t0, PT_R7(sp)
j ret_from_sys_call
END(handle_sys)
+
+ LEAF(mips_atomic_set)
+ lw v1, THREAD_CURDS($28)
+ addiu a0, a1, 4
+ or a0, a0, a1
+ li v0, -EFAULT
+ and a0, a0, v1
+ bltz a0, 8f
+
+#ifdef CONFIG_CPU_HAS_LLSC
+ /* Ok, this is the ll/sc case. World is sane :-) */
+1: ll v0, (a1)
+ move a0, a2
+2: sc a0, (a1)
+ beqz a0, 1b
+
+ .section __ex_table,"a"
+ PTR 1b, bad_stack
+ PTR 2b, bad_stack
+ .previous
+#else
+ sw a1, 16(sp)
+ sw a2, 20(sp)
+
+ move a0, sp
+ move a2, a1
+ li a1, 1
+ jal do_page_fault
+
+ lw a1, 16(sp)
+ lw a2, 20(sp)
+
+ /*
+ * At this point the page should be readable and writable unless
+ * there was no more memory available.
+ */
+1: lw v0, (a1)
+2: sw a2, (a1)
+
+ .section __ex_table,"a"
+ PTR 1b, no_mem
+ PTR 2b, no_mem
+ .previous
+#endif
+
+ sw v0, PT_R2(sp) # result
+1:
+
+ /* Success, so skip usual error handling garbage. */
+ lw t0, TASK_PTRACE($28) # syscall tracing enabled?
+ andi t0, PT_TRACESYS
+ bnez t0, 1f
+ b o32_ret_from_sys_call
+
+1: SAVE_STATIC
+ jal syscall_trace
+ li a3, 0 # success
+ j ret_from_sys_call
+
+no_mem: li v0, -ENOMEM
+ jr ra
+
+8: li v0, -EFAULT
+9: jr ra
+ END(mips_atomic_set)
+
+ LEAF(sys_sysmips)
+ beq a0, MIPS_ATOMIC_SET, mips_atomic_set
+ j _sys_sysmips
+ END(sys_sysmips)
Index: syscalls.h
===================================================================
RCS file: /cvsroot/linux-mips/linux/arch/mips/kernel/syscalls.h,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -d -r1.3 -r1.4
--- syscalls.h 2001/08/13 22:08:37 1.3
+++ syscalls.h 2001/10/27 20:52:05 1.4
@@ -163,7 +163,7 @@
SYS(sys_writev, 3)
SYS(sys_cacheflush, 3)
SYS(sys_cachectl, 3)
-SYS(fast_sysmips, 4)
+SYS(sys_sysmips, 4)
SYS(sys_ni_syscall, 0) /* 4150 */
SYS(sys_getsid, 1)
SYS(sys_fdatasync, 0)
Index: sysmips.c
===================================================================
RCS file: /cvsroot/linux-mips/linux/arch/mips/kernel/sysmips.c,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -d -r1.8 -r1.9
--- sysmips.c 2001/09/26 03:18:54 1.8
+++ sysmips.c 2001/10/27 20:52:05 1.9
@@ -1,11 +1,10 @@
/*
- * MIPS specific syscalls
- *
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 1995, 1996, 1997, 2000 by Ralf Baechle
+ * Copyright (C) 1995, 1996, 1997, 2000, 2001 by Ralf Baechle
+ * Copyright (C) 2001 MIPS Technologies, Inc.
*/
#include <linux/config.h>
#include <linux/errno.h>
@@ -48,7 +47,7 @@
}
asmlinkage int
-sys_sysmips(int cmd, int arg1, int arg2, int arg3)
+_sys_sysmips(int cmd, int arg1, int arg2, int arg3)
{
char *name;
int tmp, len, retval;
@@ -72,86 +71,11 @@
system_utsname.nodename[len] = '\0';
return 0;
}
-
- case MIPS_ATOMIC_SET: {
- int *ptr, val, ret, err, tmp;
- struct siginfo info;
-
- ptr = (int *)arg1;
- val = (int)arg2;
-
- /* Don't emulate unaligned accesses. */
- if ((int)ptr & 3) {
- info.si_signo = SIGBUS;
- info.si_code = BUS_ADRALN;
- goto fault;
- }
-
- /* A zero here saves us three instructions. */
- err = verify_area(VERIFY_WRITE, ptr, 0);
- if (err) {
- info.si_signo = SIGSEGV;
- info.si_code = SEGV_ACCERR;
- goto fault;
- }
-
-#ifdef CONFIG_CPU_HAS_LLSC
- __asm__(".set mips2\n\t"
- "1:\n\t"
- "ll %0,%5\n\t"
- ".set push\n\t"
- ".set noreorder\n\t"
- "beq %0,%4,3f\n\t"
- " move %3,%4\n"
- ".set pop\n\t"
- "2:\n\t"
- "sc %3,%1\n\t"
- "beqz %3,1b\n\t"
- "3:\n\t"
- ".set mips0\n\t"
- ".section .fixup,\"ax\"\n"
- "4:\n\t"
- "li %2,%7\n\t"
- "j 3b\n\t"
- ".previous\n\t"
- ".section __ex_table,\"a\"\n\t"
- ".word 1b,4b\n\t"
- ".word 2b,4b\n\t"
- ".previous"
- : "=&r" (ret), "=m" (*ptr), "=r" (err), "=&r" (tmp)
- : "r" (val), "1" (*ptr), "2" (0), "i" (-EFAULT));
-#else
- save_and_cli(tmp);
- err = __get_user(ret, ptr);
- if (ret != val)
- err |= __put_user(val, ptr); /* No fault
- unless unwriteable. */
- restore_flags(tmp);
-#endif
- if (err) {
- info.si_signo = SIGSEGV;
- info.si_code = SEGV_MAPERR;
- goto fault;
- }
-
- if ( (ret < 0) && (ret >= -EMAXERRNO) ) {
- info.si_signo = SIGSYS;
- info.si_code = 0;
- goto fault;
- }
-
- return ret;
-
-fault:
- /* Go back to SYSCALL. */
- ((struct pt_regs *)&cmd)->cp0_epc -= 4;
-
- info.si_addr = (void *)((struct pt_regs *)&cmd)->cp0_epc;
- force_sig_info(info.si_signo, &info, current);
-
- return 0;
- }
+ case MIPS_ATOMIC_SET:
+ printk(KERN_CRIT "How did I get here?\n");
+ retval = -EINVAL;
+ goto out;
case MIPS_FIXADE:
tmp = current->thread.mflags & ~3;
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