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Merge git://oak/home/sfr/kernels/iseries/work/

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This commit is contained in:
Paul Mackerras 2005-10-28 13:50:39 +10:00
commit 22b280324a
18 changed files with 21 additions and 3064 deletions
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8
arch/powerpc/kernel/Makefile
View File

@ -13,7 +13,7 @@ endif
obj-y := semaphore.o cputable.o ptrace.o syscalls.o \
signal_32.o pmc.o
obj-$(CONFIG_PPC64) += setup_64.o binfmt_elf32.o sys_ppc32.o \
ptrace32.o
ptrace32.o systbl.o
obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
obj-$(CONFIG_POWER4) += idle_power4.o
obj-$(CONFIG_PPC_OF) += of_device.o
@ -28,12 +28,11 @@ extra-$(CONFIG_40x) := head_4xx.o
extra-$(CONFIG_44x) := head_44x.o
extra-$(CONFIG_FSL_BOOKE) := head_fsl_booke.o
extra-$(CONFIG_8xx) := head_8xx.o
extra-$(CONFIG_PPC64) += entry_64.o
extra-y += vmlinux.lds
obj-y += process.o init_task.o time.o \
prom.o systbl.o traps.o setup-common.o
obj-$(CONFIG_PPC32) += entry_32.o setup_32.o misc_32.o
prom.o traps.o setup-common.o
obj-$(CONFIG_PPC32) += entry_32.o setup_32.o misc_32.o systbl.o
obj-$(CONFIG_PPC64) += misc_64.o
obj-$(CONFIG_PPC_OF) += prom_init.o
obj-$(CONFIG_MODULES) += ppc_ksyms.o
@ -54,3 +53,4 @@ obj-$(CONFIG_PPC64) += traps.o process.o init_task.o time.o \
endif
extra-$(CONFIG_PPC_FPU) += fpu.o
extra-$(CONFIG_PPC64) += entry_64.o

18
arch/powerpc/kernel/setup_64.c
View File

@ -701,17 +701,6 @@ static void __init emergency_stack_init(void)
limit)) + PAGE_SIZE;
}
extern unsigned long *sys_call_table;
extern unsigned long sys_ni_syscall;
#ifdef CONFIG_PPC_MERGE
#define SYS_CALL_ENTRY64(i) sys_call_table[(i) * 2]
#define SYS_CALL_ENTRY32(i) sys_call_table[(i) * 2 + 1]
#else
extern unsigned long *sys_call_table32;
#define SYS_CALL_ENTRY64(i) sys_call_table[(i)]
#define SYS_CALL_ENTRY32(i) sys_call_table32[(i)]
#endif
/*
* Called from setup_arch to initialize the bitmap of available
* syscalls in the systemcfg page
@ -719,14 +708,17 @@ extern unsigned long *sys_call_table32;
void __init setup_syscall_map(void)
{
unsigned int i, count64 = 0, count32 = 0;
extern unsigned long *sys_call_table;
extern unsigned long sys_ni_syscall;
for (i = 0; i < __NR_syscalls; i++) {
if (SYS_CALL_ENTRY64(i) != sys_ni_syscall) {
if (sys_call_table[i*2] != sys_ni_syscall) {
count64++;
systemcfg->syscall_map_64[i >> 5] |=
0x80000000UL >> (i & 0x1f);
}
if (SYS_CALL_ENTRY32(i) != sys_ni_syscall) {
if (sys_call_table[i*2+1] != sys_ni_syscall) {
count32++;
systemcfg->syscall_map_32[i >> 5] |=
0x80000000UL >> (i & 0x1f);

12
arch/powerpc/lib/Makefile
View File

@ -2,12 +2,16 @@
# Makefile for ppc-specific library files..
#
obj-y := strcase.o string.o
ifeq ($(CONFIG_PPC_MERGE),y)
obj-y := string.o
endif
obj-y += strcase.o
obj-$(CONFIG_PPC32) += div64.o copy_32.o checksum_32.o
obj-$(CONFIG_PPC64) += copypage_64.o copyuser_64.o memcpy_64.o \
usercopy_64.o sstep.o checksum_64.o mem_64.o
obj-$(CONFIG_PPC64) += checksum_64.o copypage_64.o copyuser_64.o \
memcpy_64.o usercopy_64.o mem_64.o
obj-$(CONFIG_PPC_ISERIES) += e2a.o
ifeq ($(CONFIG_PPC64),y)
obj-$(CONFIG_SMP) += locks.o
obj-$(CONFIG_DEBUG_KERNEL) += sstep.o
endif

2
arch/ppc64/Makefile
View File

@ -81,12 +81,14 @@ CFLAGS += $(call cc-option,-funit-at-a-time)
head-y := arch/ppc64/kernel/head.o
head-y += arch/powerpc/kernel/fpu.o
head-y += arch/powerpc/kernel/entry_64.o
libs-y += arch/ppc64/lib/
core-y += arch/ppc64/kernel/ arch/powerpc/kernel/
core-y += arch/powerpc/mm/
core-y += arch/powerpc/sysdev/
core-y += arch/powerpc/platforms/
core-y += arch/powerpc/lib/
core-$(CONFIG_XMON) += arch/ppc64/xmon/
drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/

2
arch/ppc64/kernel/Makefile
View File

@ -7,7 +7,7 @@ ifneq ($(CONFIG_PPC_MERGE),y)
EXTRA_CFLAGS += -mno-minimal-toc
extra-y := head.o vmlinux.lds
obj-y := entry.o misc.o prom.o
obj-y := misc.o prom.o
endif

845
arch/ppc64/kernel/entry.S
View File

@ -1,845 +0,0 @@
/*
* arch/ppc64/kernel/entry.S
*
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
* Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
* Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
* Adapted for Power Macintosh by Paul Mackerras.
* Low-level exception handlers and MMU support
* rewritten by Paul Mackerras.
* Copyright (C) 1996 Paul Mackerras.
* MPC8xx modifications Copyright (C) 1997 Dan Malek (dmalek@jlc.net).
*
* This file contains the system call entry code, context switch
* code, and exception/interrupt return code for PowerPC.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <asm/unistd.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/mmu.h>
#include <asm/thread_info.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
#include <asm/cputable.h>
#ifdef CONFIG_PPC_ISERIES
#define DO_SOFT_DISABLE
#endif
/*
* System calls.
*/
.section ".toc","aw"
.SYS_CALL_TABLE:
.tc .sys_call_table[TC],.sys_call_table
.SYS_CALL_TABLE32:
.tc .sys_call_table32[TC],.sys_call_table32
/* This value is used to mark exception frames on the stack. */
exception_marker:
.tc ID_72656773_68657265[TC],0x7265677368657265
.section ".text"
.align 7
#undef SHOW_SYSCALLS
.globl system_call_common
system_call_common:
andi. r10,r12,MSR_PR
mr r10,r1
addi r1,r1,-INT_FRAME_SIZE
beq- 1f
ld r1,PACAKSAVE(r13)
1: std r10,0(r1)
std r11,_NIP(r1)
std r12,_MSR(r1)
std r0,GPR0(r1)
std r10,GPR1(r1)
std r2,GPR2(r1)
std r3,GPR3(r1)
std r4,GPR4(r1)
std r5,GPR5(r1)
std r6,GPR6(r1)
std r7,GPR7(r1)
std r8,GPR8(r1)
li r11,0
std r11,GPR9(r1)
std r11,GPR10(r1)
std r11,GPR11(r1)
std r11,GPR12(r1)
std r9,GPR13(r1)
crclr so
mfcr r9
mflr r10
li r11,0xc01
std r9,_CCR(r1)
std r10,_LINK(r1)
std r11,_TRAP(r1)
mfxer r9
mfctr r10
std r9,_XER(r1)
std r10,_CTR(r1)
std r3,ORIG_GPR3(r1)
ld r2,PACATOC(r13)
addi r9,r1,STACK_FRAME_OVERHEAD
ld r11,exception_marker@toc(r2)
std r11,-16(r9) /* "regshere" marker */
#ifdef CONFIG_PPC_ISERIES
/* Hack for handling interrupts when soft-enabling on iSeries */
cmpdi cr1,r0,0x5555 /* syscall 0x5555 */
andi. r10,r12,MSR_PR /* from kernel */
crand 4*cr0+eq,4*cr1+eq,4*cr0+eq
beq hardware_interrupt_entry
lbz r10,PACAPROCENABLED(r13)
std r10,SOFTE(r1)
#endif
mfmsr r11
ori r11,r11,MSR_EE
mtmsrd r11,1
#ifdef SHOW_SYSCALLS
bl .do_show_syscall
REST_GPR(0,r1)
REST_4GPRS(3,r1)
REST_2GPRS(7,r1)
addi r9,r1,STACK_FRAME_OVERHEAD
#endif
clrrdi r11,r1,THREAD_SHIFT
li r12,0
ld r10,TI_FLAGS(r11)
stb r12,TI_SC_NOERR(r11)
andi. r11,r10,_TIF_SYSCALL_T_OR_A
bne- syscall_dotrace
syscall_dotrace_cont:
cmpldi 0,r0,NR_syscalls
bge- syscall_enosys
system_call: /* label this so stack traces look sane */
/*
* Need to vector to 32 Bit or default sys_call_table here,
* based on caller's run-mode / personality.
*/
ld r11,.SYS_CALL_TABLE@toc(2)
andi. r10,r10,_TIF_32BIT
beq 15f
ld r11,.SYS_CALL_TABLE32@toc(2)
clrldi r3,r3,32
clrldi r4,r4,32
clrldi r5,r5,32
clrldi r6,r6,32
clrldi r7,r7,32
clrldi r8,r8,32
15:
slwi r0,r0,3
ldx r10,r11,r0 /* Fetch system call handler [ptr] */
mtctr r10
bctrl /* Call handler */
syscall_exit:
#ifdef SHOW_SYSCALLS
std r3,GPR3(r1)
bl .do_show_syscall_exit
ld r3,GPR3(r1)
#endif
std r3,RESULT(r1)
ld r5,_CCR(r1)
li r10,-_LAST_ERRNO
cmpld r3,r10
clrrdi r12,r1,THREAD_SHIFT
bge- syscall_error
syscall_error_cont:
/* check for syscall tracing or audit */
ld r9,TI_FLAGS(r12)
andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP)
bne- syscall_exit_trace
syscall_exit_trace_cont:
/* disable interrupts so current_thread_info()->flags can't change,
and so that we don't get interrupted after loading SRR0/1. */
ld r8,_MSR(r1)
andi. r10,r8,MSR_RI
beq- unrecov_restore
mfmsr r10
rldicl r10,r10,48,1
rotldi r10,r10,16
mtmsrd r10,1
ld r9,TI_FLAGS(r12)
andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SIGPENDING|_TIF_NEED_RESCHED)
bne- syscall_exit_work
ld r7,_NIP(r1)
stdcx. r0,0,r1 /* to clear the reservation */
andi. r6,r8,MSR_PR
ld r4,_LINK(r1)
beq- 1f /* only restore r13 if */
ld r13,GPR13(r1) /* returning to usermode */
1: ld r2,GPR2(r1)
li r12,MSR_RI
andc r10,r10,r12
mtmsrd r10,1 /* clear MSR.RI */
ld r1,GPR1(r1)
mtlr r4
mtcr r5
mtspr SPRN_SRR0,r7
mtspr SPRN_SRR1,r8
rfid
b . /* prevent speculative execution */
syscall_enosys:
li r3,-ENOSYS
std r3,RESULT(r1)
clrrdi r12,r1,THREAD_SHIFT
ld r5,_CCR(r1)
syscall_error:
lbz r11,TI_SC_NOERR(r12)
cmpwi 0,r11,0
bne- syscall_error_cont
neg r3,r3
oris r5,r5,0x1000 /* Set SO bit in CR */
std r5,_CCR(r1)
b syscall_error_cont
/* Traced system call support */
syscall_dotrace:
bl .save_nvgprs
addi r3,r1,STACK_FRAME_OVERHEAD
bl .do_syscall_trace_enter
ld r0,GPR0(r1) /* Restore original registers */
ld r3,GPR3(r1)
ld r4,GPR4(r1)
ld r5,GPR5(r1)
ld r6,GPR6(r1)
ld r7,GPR7(r1)
ld r8,GPR8(r1)
addi r9,r1,STACK_FRAME_OVERHEAD
clrrdi r10,r1,THREAD_SHIFT
ld r10,TI_FLAGS(r10)
b syscall_dotrace_cont
syscall_exit_trace:
std r3,GPR3(r1)
bl .save_nvgprs
addi r3,r1,STACK_FRAME_OVERHEAD
bl .do_syscall_trace_leave
REST_NVGPRS(r1)
ld r3,GPR3(r1)
ld r5,_CCR(r1)
clrrdi r12,r1,THREAD_SHIFT
b syscall_exit_trace_cont
/* Stuff to do on exit from a system call. */
syscall_exit_work:
std r3,GPR3(r1)
std r5,_CCR(r1)
b .ret_from_except_lite
/* Save non-volatile GPRs, if not already saved. */
_GLOBAL(save_nvgprs)
ld r11,_TRAP(r1)
andi. r0,r11,1
beqlr-
SAVE_NVGPRS(r1)
clrrdi r0,r11,1
std r0,_TRAP(r1)
blr
/*
* The sigsuspend and rt_sigsuspend system calls can call do_signal
* and thus put the process into the stopped state where we might
* want to examine its user state with ptrace. Therefore we need
* to save all the nonvolatile registers (r14 - r31) before calling
* the C code. Similarly, fork, vfork and clone need the full
* register state on the stack so that it can be copied to the child.
*/
_GLOBAL(ppc32_sigsuspend)
bl .save_nvgprs
bl .compat_sys_sigsuspend
b 70f
_GLOBAL(ppc64_rt_sigsuspend)
bl .save_nvgprs
bl .sys_rt_sigsuspend
b 70f
_GLOBAL(ppc32_rt_sigsuspend)
bl .save_nvgprs
bl .compat_sys_rt_sigsuspend
70: cmpdi 0,r3,0
/* If it returned an error, we need to return via syscall_exit to set
the SO bit in cr0 and potentially stop for ptrace. */
bne syscall_exit
/* If sigsuspend() returns zero, we are going into a signal handler. We
may need to call audit_syscall_exit() to mark the exit from sigsuspend() */
#ifdef CONFIG_AUDIT
ld r3,PACACURRENT(r13)
ld r4,AUDITCONTEXT(r3)
cmpdi 0,r4,0
beq .ret_from_except /* No audit_context: Leave immediately. */
li r4, 2 /* AUDITSC_FAILURE */
li r5,-4 /* It's always -EINTR */
bl .audit_syscall_exit
#endif
b .ret_from_except
_GLOBAL(ppc_fork)
bl .save_nvgprs
bl .sys_fork
b syscall_exit
_GLOBAL(ppc_vfork)
bl .save_nvgprs
bl .sys_vfork
b syscall_exit
_GLOBAL(ppc_clone)
bl .save_nvgprs
bl .sys_clone
b syscall_exit
_GLOBAL(ppc32_swapcontext)
bl .save_nvgprs
bl .compat_sys_swapcontext
b 80f
_GLOBAL(ppc64_swapcontext)
bl .save_nvgprs
bl .sys_swapcontext
b 80f
_GLOBAL(ppc32_sigreturn)
bl .compat_sys_sigreturn
b 80f
_GLOBAL(ppc32_rt_sigreturn)
bl .compat_sys_rt_sigreturn
b 80f
_GLOBAL(ppc64_rt_sigreturn)
bl .sys_rt_sigreturn
80: cmpdi 0,r3,0
blt syscall_exit
clrrdi r4,r1,THREAD_SHIFT
ld r4,TI_FLAGS(r4)
andi. r4,r4,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP)
beq+ 81f
addi r3,r1,STACK_FRAME_OVERHEAD
bl .do_syscall_trace_leave
81: b .ret_from_except
_GLOBAL(ret_from_fork)
bl .schedule_tail
REST_NVGPRS(r1)
li r3,0
b syscall_exit
/*
* This routine switches between two different tasks. The process
* state of one is saved on its kernel stack. Then the state
* of the other is restored from its kernel stack. The memory
* management hardware is updated to the second process's state.
* Finally, we can return to the second process, via ret_from_except.
* On entry, r3 points to the THREAD for the current task, r4
* points to the THREAD for the new task.
*
* Note: there are two ways to get to the "going out" portion
* of this code; either by coming in via the entry (_switch)
* or via "fork" which must set up an environment equivalent
* to the "_switch" path. If you change this you'll have to change
* the fork code also.
*
* The code which creates the new task context is in 'copy_thread'
* in arch/ppc64/kernel/process.c
*/
.align 7
_GLOBAL(_switch)
mflr r0
std r0,16(r1)
stdu r1,-SWITCH_FRAME_SIZE(r1)
/* r3-r13 are caller saved -- Cort */
SAVE_8GPRS(14, r1)
SAVE_10GPRS(22, r1)
mflr r20 /* Return to switch caller */
mfmsr r22
li r0, MSR_FP
#ifdef CONFIG_ALTIVEC
BEGIN_FTR_SECTION
oris r0,r0,MSR_VEC@h /* Disable altivec */
mfspr r24,SPRN_VRSAVE /* save vrsave register value */
std r24,THREAD_VRSAVE(r3)
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif /* CONFIG_ALTIVEC */
and. r0,r0,r22
beq+ 1f
andc r22,r22,r0
mtmsrd r22
isync
1: std r20,_NIP(r1)
mfcr r23
std r23,_CCR(r1)
std r1,KSP(r3) /* Set old stack pointer */
#ifdef CONFIG_SMP
/* We need a sync somewhere here to make sure that if the
* previous task gets rescheduled on another CPU, it sees all
* stores it has performed on this one.
*/
sync
#endif /* CONFIG_SMP */
addi r6,r4,-THREAD /* Convert THREAD to 'current' */
std r6,PACACURRENT(r13) /* Set new 'current' */
ld r8,KSP(r4) /* new stack pointer */
BEGIN_FTR_SECTION
clrrdi r6,r8,28 /* get its ESID */
clrrdi r9,r1,28 /* get current sp ESID */
clrldi. r0,r6,2 /* is new ESID c00000000? */
cmpd cr1,r6,r9 /* or is new ESID the same as current ESID? */
cror eq,4*cr1+eq,eq
beq 2f /* if yes, don't slbie it */
/* Bolt in the new stack SLB entry */
ld r7,KSP_VSID(r4) /* Get new stack's VSID */
oris r0,r6,(SLB_ESID_V)@h
ori r0,r0,(SLB_NUM_BOLTED-1)@l
slbie r6
slbie r6 /* Workaround POWER5 < DD2.1 issue */
slbmte r7,r0
isync
2:
END_FTR_SECTION_IFSET(CPU_FTR_SLB)
clrrdi r7,r8,THREAD_SHIFT /* base of new stack */
/* Note: this uses SWITCH_FRAME_SIZE rather than INT_FRAME_SIZE
because we don't need to leave the 288-byte ABI gap at the
top of the kernel stack. */
addi r7,r7,THREAD_SIZE-SWITCH_FRAME_SIZE
mr r1,r8 /* start using new stack pointer */
std r7,PACAKSAVE(r13)
ld r6,_CCR(r1)
mtcrf 0xFF,r6
#ifdef CONFIG_ALTIVEC
BEGIN_FTR_SECTION
ld r0,THREAD_VRSAVE(r4)
mtspr SPRN_VRSAVE,r0 /* if G4, restore VRSAVE reg */
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif /* CONFIG_ALTIVEC */
/* r3-r13 are destroyed -- Cort */
REST_8GPRS(14, r1)
REST_10GPRS(22, r1)
/* convert old thread to its task_struct for return value */
addi r3,r3,-THREAD
ld r7,_NIP(r1) /* Return to _switch caller in new task */
mtlr r7
addi r1,r1,SWITCH_FRAME_SIZE
blr
.align 7
_GLOBAL(ret_from_except)
ld r11,_TRAP(r1)
andi. r0,r11,1
bne .ret_from_except_lite
REST_NVGPRS(r1)
_GLOBAL(ret_from_except_lite)
/*
* Disable interrupts so that current_thread_info()->flags
* can't change between when we test it and when we return
* from the interrupt.
*/
mfmsr r10 /* Get current interrupt state */
rldicl r9,r10,48,1 /* clear MSR_EE */
rotldi r9,r9,16
mtmsrd r9,1 /* Update machine state */
#ifdef CONFIG_PREEMPT
clrrdi r9,r1,THREAD_SHIFT /* current_thread_info() */
li r0,_TIF_NEED_RESCHED /* bits to check */
ld r3,_MSR(r1)
ld r4,TI_FLAGS(r9)
/* Move MSR_PR bit in r3 to _TIF_SIGPENDING position in r0 */
rlwimi r0,r3,32+TIF_SIGPENDING-MSR_PR_LG,_TIF_SIGPENDING
and. r0,r4,r0 /* check NEED_RESCHED and maybe SIGPENDING */
bne do_work
#else /* !CONFIG_PREEMPT */
ld r3,_MSR(r1) /* Returning to user mode? */
andi. r3,r3,MSR_PR
beq restore /* if not, just restore regs and return */
/* Check current_thread_info()->flags */
clrrdi r9,r1,THREAD_SHIFT
ld r4,TI_FLAGS(r9)
andi. r0,r4,_TIF_USER_WORK_MASK
bne do_work
#endif
restore:
#ifdef CONFIG_PPC_ISERIES
ld r5,SOFTE(r1)
cmpdi 0,r5,0
beq 4f
/* Check for pending interrupts (iSeries) */
ld r3,PACALPPACA+LPPACAANYINT(r13)
cmpdi r3,0
beq+ 4f /* skip do_IRQ if no interrupts */
li r3,0
stb r3,PACAPROCENABLED(r13) /* ensure we are soft-disabled */
ori r10,r10,MSR_EE
mtmsrd r10 /* hard-enable again */
addi r3,r1,STACK_FRAME_OVERHEAD
bl .do_IRQ
b .ret_from_except_lite /* loop back and handle more */
4: stb r5,PACAPROCENABLED(r13)
#endif
ld r3,_MSR(r1)
andi. r0,r3,MSR_RI
beq- unrecov_restore
andi. r0,r3,MSR_PR
/*
* r13 is our per cpu area, only restore it if we are returning to
* userspace
*/
beq 1f
REST_GPR(13, r1)
1:
ld r3,_CTR(r1)
ld r0,_LINK(r1)
mtctr r3
mtlr r0
ld r3,_XER(r1)
mtspr SPRN_XER,r3
REST_8GPRS(5, r1)
stdcx. r0,0,r1 /* to clear the reservation */
mfmsr r0
li r2, MSR_RI
andc r0,r0,r2
mtmsrd r0,1
ld r0,_MSR(r1)
mtspr SPRN_SRR1,r0
ld r2,_CCR(r1)
mtcrf 0xFF,r2
ld r2,_NIP(r1)
mtspr SPRN_SRR0,r2
ld r0,GPR0(r1)
ld r2,GPR2(r1)
ld r3,GPR3(r1)
ld r4,GPR4(r1)
ld r1,GPR1(r1)
rfid
b . /* prevent speculative execution */
/* Note: this must change if we start using the TIF_NOTIFY_RESUME bit */
do_work:
#ifdef CONFIG_PREEMPT
andi. r0,r3,MSR_PR /* Returning to user mode? */
bne user_work
/* Check that preempt_count() == 0 and interrupts are enabled */
lwz r8,TI_PREEMPT(r9)
cmpwi cr1,r8,0
#ifdef CONFIG_PPC_ISERIES
ld r0,SOFTE(r1)
cmpdi r0,0
#else
andi. r0,r3,MSR_EE
#endif
crandc eq,cr1*4+eq,eq
bne restore
/* here we are preempting the current task */
1:
#ifdef CONFIG_PPC_ISERIES
li r0,1
stb r0,PACAPROCENABLED(r13)
#endif
ori r10,r10,MSR_EE
mtmsrd r10,1 /* reenable interrupts */
bl .preempt_schedule
mfmsr r10
clrrdi r9,r1,THREAD_SHIFT
rldicl r10,r10,48,1 /* disable interrupts again */
rotldi r10,r10,16
mtmsrd r10,1
ld r4,TI_FLAGS(r9)
andi. r0,r4,_TIF_NEED_RESCHED
bne 1b
b restore
user_work:
#endif
/* Enable interrupts */
ori r10,r10,MSR_EE
mtmsrd r10,1
andi. r0,r4,_TIF_NEED_RESCHED
beq 1f
bl .schedule
b .ret_from_except_lite
1: bl .save_nvgprs
li r3,0
addi r4,r1,STACK_FRAME_OVERHEAD
bl .do_signal
b .ret_from_except
unrecov_restore:
addi r3,r1,STACK_FRAME_OVERHEAD
bl .unrecoverable_exception
b unrecov_restore
#ifdef CONFIG_PPC_RTAS
/*
* On CHRP, the Run-Time Abstraction Services (RTAS) have to be
* called with the MMU off.
*
* In addition, we need to be in 32b mode, at least for now.
*
* Note: r3 is an input parameter to rtas, so don't trash it...
*/
_GLOBAL(enter_rtas)
mflr r0
std r0,16(r1)
stdu r1,-RTAS_FRAME_SIZE(r1) /* Save SP and create stack space. */
/* Because RTAS is running in 32b mode, it clobbers the high order half
* of all registers that it saves. We therefore save those registers
* RTAS might touch to the stack. (r0, r3-r13 are caller saved)
*/
SAVE_GPR(2, r1) /* Save the TOC */
SAVE_GPR(13, r1) /* Save paca */
SAVE_8GPRS(14, r1) /* Save the non-volatiles */
SAVE_10GPRS(22, r1) /* ditto */
mfcr r4
std r4,_CCR(r1)
mfctr r5
std r5,_CTR(r1)
mfspr r6,SPRN_XER
std r6,_XER(r1)
mfdar r7
std r7,_DAR(r1)
mfdsisr r8
std r8,_DSISR(r1)
mfsrr0 r9
std r9,_SRR0(r1)
mfsrr1 r10
std r10,_SRR1(r1)
/* There is no way it is acceptable to get here with interrupts enabled,
* check it with the asm equivalent of WARN_ON
*/
mfmsr r6
andi. r0,r6,MSR_EE
1: tdnei r0,0
.section __bug_table,"a"
.llong 1b,__LINE__ + 0x1000000, 1f, 2f
.previous
.section .rodata,"a"
1: .asciz __FILE__
2: .asciz "enter_rtas"
.previous
/* Unfortunately, the stack pointer and the MSR are also clobbered,
* so they are saved in the PACA which allows us to restore
* our original state after RTAS returns.
*/
std r1,PACAR1(r13)
std r6,PACASAVEDMSR(r13)
/* Setup our real return addr */
SET_REG_TO_LABEL(r4,.rtas_return_loc)
SET_REG_TO_CONST(r9,KERNELBASE)
sub r4,r4,r9
mtlr r4
li r0,0
ori r0,r0,MSR_EE|MSR_SE|MSR_BE|MSR_RI
andc r0,r6,r0
li r9,1
rldicr r9,r9,MSR_SF_LG,(63-MSR_SF_LG)
ori r9,r9,MSR_IR|MSR_DR|MSR_FE0|MSR_FE1|MSR_FP
andc r6,r0,r9
ori r6,r6,MSR_RI
sync /* disable interrupts so SRR0/1 */
mtmsrd r0 /* don't get trashed */
SET_REG_TO_LABEL(r4,rtas)
ld r5,RTASENTRY(r4) /* get the rtas->entry value */
ld r4,RTASBASE(r4) /* get the rtas->base value */
mtspr SPRN_SRR0,r5
mtspr SPRN_SRR1,r6
rfid
b . /* prevent speculative execution */
_STATIC(rtas_return_loc)
/* relocation is off at this point */
mfspr r4,SPRN_SPRG3 /* Get PACA */
SET_REG_TO_CONST(r5, KERNELBASE)
sub r4,r4,r5 /* RELOC the PACA base pointer */
mfmsr r6
li r0,MSR_RI
andc r6,r6,r0
sync
mtmsrd r6
ld r1,PACAR1(r4) /* Restore our SP */
LOADADDR(r3,.rtas_restore_regs)
ld r4,PACASAVEDMSR(r4) /* Restore our MSR */
mtspr SPRN_SRR0,r3
mtspr SPRN_SRR1,r4
rfid
b . /* prevent speculative execution */
_STATIC(rtas_restore_regs)
/* relocation is on at this point */
REST_GPR(2, r1) /* Restore the TOC */
REST_GPR(13, r1) /* Restore paca */
REST_8GPRS(14, r1) /* Restore the non-volatiles */
REST_10GPRS(22, r1) /* ditto */
mfspr r13,SPRN_SPRG3
ld r4,_CCR(r1)
mtcr r4
ld r5,_CTR(r1)
mtctr r5
ld r6,_XER(r1)
mtspr SPRN_XER,r6
ld r7,_DAR(r1)
mtdar r7
ld r8,_DSISR(r1)
mtdsisr r8
ld r9,_SRR0(r1)
mtsrr0 r9
ld r10,_SRR1(r1)
mtsrr1 r10
addi r1,r1,RTAS_FRAME_SIZE /* Unstack our frame */
ld r0,16(r1) /* get return address */
mtlr r0
blr /* return to caller */
#endif /* CONFIG_PPC_RTAS */
#ifdef CONFIG_PPC_MULTIPLATFORM
_GLOBAL(enter_prom)
mflr r0
std r0,16(r1)
stdu r1,-PROM_FRAME_SIZE(r1) /* Save SP and create stack space */
/* Because PROM is running in 32b mode, it clobbers the high order half
* of all registers that it saves. We therefore save those registers
* PROM might touch to the stack. (r0, r3-r13 are caller saved)
*/
SAVE_8GPRS(2, r1)
SAVE_GPR(13, r1)
SAVE_8GPRS(14, r1)
SAVE_10GPRS(22, r1)
mfcr r4
std r4,_CCR(r1)
mfctr r5
std r5,_CTR(r1)
mfspr r6,SPRN_XER
std r6,_XER(r1)
mfdar r7
std r7,_DAR(r1)
mfdsisr r8
std r8,_DSISR(r1)
mfsrr0 r9
std r9,_SRR0(r1)
mfsrr1 r10
std r10,_SRR1(r1)
mfmsr r11
std r11,_MSR(r1)
/* Get the PROM entrypoint */
ld r0,GPR4(r1)
mtlr r0
/* Switch MSR to 32 bits mode
*/
mfmsr r11
li r12,1
rldicr r12,r12,MSR_SF_LG,(63-MSR_SF_LG)
andc r11,r11,r12
li r12,1
rldicr r12,r12,MSR_ISF_LG,(63-MSR_ISF_LG)
andc r11,r11,r12
mtmsrd r11
isync
/* Restore arguments & enter PROM here... */
ld r3,GPR3(r1)
blrl
/* Just make sure that r1 top 32 bits didn't get
* corrupt by OF
*/
rldicl r1,r1,0,32
/* Restore the MSR (back to 64 bits) */
ld r0,_MSR(r1)
mtmsrd r0
isync
/* Restore other registers */
REST_GPR(2, r1)
REST_GPR(13, r1)
REST_8GPRS(14, r1)
REST_10GPRS(22, r1)
ld r4,_CCR(r1)
mtcr r4
ld r5,_CTR(r1)
mtctr r5
ld r6,_XER(r1)
mtspr SPRN_XER,r6
ld r7,_DAR(r1)
mtdar r7
ld r8,_DSISR(r1)
mtdsisr r8
ld r9,_SRR0(r1)
mtsrr0 r9
ld r10,_SRR1(r1)
mtsrr1 r10
addi r1,r1,PROM_FRAME_SIZE
ld r0,16(r1)
mtlr r0
blr
#endif /* CONFIG_PPC_MULTIPLATFORM */

563
arch/ppc64/kernel/misc.S
View File

@ -867,566 +867,3 @@ _GLOBAL(kexec_sequence)
li r5,0
blr /* image->start(physid, image->start, 0); */
#endif /* CONFIG_KEXEC */
/* Why isn't this a) automatic, b) written in 'C'? */
.balign 8
_GLOBAL(sys_call_table32)
.llong .sys_restart_syscall /* 0 */
.llong .sys_exit
.llong .ppc_fork
.llong .sys_read
.llong .sys_write
.llong .compat_sys_open /* 5 */
.llong .sys_close
.llong .compat_sys_waitpid
.llong .compat_sys_creat
.llong .sys_link
.llong .sys_unlink /* 10 */
.llong .compat_sys_execve
.llong .sys_chdir
.llong .compat_sys_time
.llong .sys_mknod
.llong .sys_chmod /* 15 */
.llong .sys_lchown
.llong .sys_ni_syscall /* old break syscall */
.llong .sys_ni_syscall /* old stat syscall */
.llong .ppc32_lseek
.llong .sys_getpid /* 20 */
.llong .compat_sys_mount
.llong .sys_oldumount
.llong .sys_setuid
.llong .sys_getuid
.llong .compat_sys_stime /* 25 */
.llong .compat_sys_ptrace
.llong .sys_alarm
.llong .sys_ni_syscall /* old fstat syscall */
.llong .compat_sys_pause
.llong .compat_sys_utime /* 30 */
.llong .sys_ni_syscall /* old stty syscall */
.llong .sys_ni_syscall /* old gtty syscall */
.llong .compat_sys_access
.llong .compat_sys_nice
.llong .sys_ni_syscall /* 35 - old ftime syscall */
.llong .sys_sync
.llong .compat_sys_kill
.llong .sys_rename
.llong .compat_sys_mkdir
.llong .sys_rmdir /* 40 */
.llong .sys_dup
.llong .sys_pipe
.llong .compat_sys_times
.llong .sys_ni_syscall /* old prof syscall */
.llong .sys_brk /* 45 */
.llong .sys_setgid
.llong .sys_getgid
.llong .sys_signal
.llong .sys_geteuid
.llong .sys_getegid /* 50 */
.llong .sys_acct
.llong .sys_umount
.llong .sys_ni_syscall /* old lock syscall */
.llong .compat_sys_ioctl
.llong .compat_sys_fcntl /* 55 */
.llong .sys_ni_syscall /* old mpx syscall */
.llong .compat_sys_setpgid
.llong .sys_ni_syscall /* old ulimit syscall */
.llong .sys_olduname
.llong .compat_sys_umask /* 60 */
.llong .sys_chroot
.llong .sys_ustat
.llong .sys_dup2
.llong .sys_getppid
.llong .sys_getpgrp /* 65 */
.llong .sys_setsid
.llong .compat_sys_sigaction
.llong .sys_sgetmask
.llong .compat_sys_ssetmask
.llong .sys_setreuid /* 70 */
.llong .sys_setregid
.llong .ppc32_sigsuspend
.llong .compat_sys_sigpending
.llong .compat_sys_sethostname
.llong .compat_sys_setrlimit /* 75 */
.llong .compat_sys_old_getrlimit
.llong .compat_sys_getrusage
.llong .compat_sys_gettimeofday
.llong .compat_sys_settimeofday
.llong .compat_sys_getgroups /* 80 */
.llong .compat_sys_setgroups
.llong .sys_ni_syscall /* old select syscall */
.llong .sys_symlink
.llong .sys_ni_syscall /* old lstat syscall */
.llong .compat_sys_readlink /* 85 */
.llong .sys_uselib
.llong .sys_swapon
.llong .sys_reboot
.llong .old32_readdir
.llong .sys_mmap /* 90 */
.llong .sys_munmap
.llong .sys_truncate
.llong .sys_ftruncate
.llong .sys_fchmod
.llong .sys_fchown /* 95 */
.llong .compat_sys_getpriority
.llong .compat_sys_setpriority
.llong .sys_ni_syscall /* old profil syscall */
.llong .compat_sys_statfs
.llong .compat_sys_fstatfs /* 100 */
.llong .sys_ni_syscall /* old ioperm syscall */
.llong .compat_sys_socketcall
.llong .compat_sys_syslog
.llong .compat_sys_setitimer
.llong .compat_sys_getitimer /* 105 */
.llong .compat_sys_newstat
.llong .compat_sys_newlstat
.llong .compat_sys_newfstat
.llong .sys_uname
.llong .sys_ni_syscall /* 110 old iopl syscall */
.llong .sys_vhangup
.llong .sys_ni_syscall /* old idle syscall */
.llong .sys_ni_syscall /* old vm86 syscall */
.llong .compat_sys_wait4
.llong .sys_swapoff /* 115 */
.llong .compat_sys_sysinfo
.llong .sys32_ipc
.llong .sys_fsync
.llong .ppc32_sigreturn
.llong .ppc_clone /* 120 */
.llong .compat_sys_setdomainname
.llong .ppc_newuname
.llong .sys_ni_syscall /* old modify_ldt syscall */
.llong .compat_sys_adjtimex
.llong .sys_mprotect /* 125 */
.llong .compat_sys_sigprocmask
.llong .sys_ni_syscall /* old create_module syscall */
.llong .sys_init_module
.llong .sys_delete_module
.llong .sys_ni_syscall /* 130 old get_kernel_syms syscall */
.llong .sys_quotactl
.llong .compat_sys_getpgid
.llong .sys_fchdir
.llong .sys_bdflush
.llong .compat_sys_sysfs /* 135 */
.llong .ppc64_personality
.llong .sys_ni_syscall /* for afs_syscall */
.llong .sys_setfsuid
.llong .sys_setfsgid
.llong .sys_llseek /* 140 */
.llong .compat_sys_getdents
.llong .ppc32_select
.llong .sys_flock
.llong .sys_msync
.llong .compat_sys_readv /* 145 */
.llong .compat_sys_writev
.llong .compat_sys_getsid
.llong .sys_fdatasync
.llong .compat_sys_sysctl
.llong .sys_mlock /* 150 */
.llong .sys_munlock
.llong .sys_mlockall
.llong .sys_munlockall
.llong .compat_sys_sched_setparam
.llong .compat_sys_sched_getparam /* 155 */
.llong .compat_sys_sched_setscheduler
.llong .compat_sys_sched_getscheduler
.llong .sys_sched_yield
.llong .compat_sys_sched_get_priority_max
.llong .compat_sys_sched_get_priority_min /* 160 */
.llong .compat_sys_sched_rr_get_interval
.llong .compat_sys_nanosleep
.llong .sys_mremap
.llong .sys_setresuid
.llong .sys_getresuid /* 165 */
.llong .sys_ni_syscall /* old query_module syscall */
.llong .sys_poll
.llong .compat_sys_nfsservctl
.llong .sys_setresgid
.llong .sys_getresgid /* 170 */
.llong .compat_sys_prctl
.llong .ppc32_rt_sigreturn
.llong .compat_sys_rt_sigaction
.llong .compat_sys_rt_sigprocmask
.llong .compat_sys_rt_sigpending /* 175 */
.llong .compat_sys_rt_sigtimedwait
.llong .compat_sys_rt_sigqueueinfo
.llong .ppc32_rt_sigsuspend
.llong .compat_sys_pread64
.llong .compat_sys_pwrite64 /* 180 */
.llong .sys_chown
.llong .sys_getcwd
.llong .sys_capget
.llong .sys_capset
.llong .compat_sys_sigaltstack /* 185 */
.llong .compat_sys_sendfile
.llong .sys_ni_syscall /* reserved for streams1 */
.llong .sys_ni_syscall /* reserved for streams2 */
.llong .ppc_vfork
.llong .compat_sys_getrlimit /* 190 */
.llong .compat_sys_readahead
.llong .compat_sys_mmap2
.llong .compat_sys_truncate64
.llong .compat_sys_ftruncate64
.llong .sys_stat64 /* 195 */
.llong .sys_lstat64
.llong .sys_fstat64
.llong .compat_sys_pciconfig_read
.llong .compat_sys_pciconfig_write
.llong .compat_sys_pciconfig_iobase /* 200 - pciconfig_iobase */
.llong .sys_ni_syscall /* reserved for MacOnLinux */
.llong .sys_getdents64
.llong .sys_pivot_root
.llong .compat_sys_fcntl64
.llong .sys_madvise /* 205 */
.llong .sys_mincore
.llong .sys_gettid
.llong .sys_tkill
.llong .sys_setxattr
.llong .sys_lsetxattr /* 210 */
.llong .sys_fsetxattr
.llong .sys_getxattr
.llong .sys_lgetxattr
.llong .sys_fgetxattr
.llong .sys_listxattr /* 215 */
.llong .sys_llistxattr
.llong .sys_flistxattr
.llong .sys_removexattr
.llong .sys_lremovexattr
.llong .sys_fremovexattr /* 220 */
.llong .compat_sys_futex
.llong .compat_sys_sched_setaffinity
.llong .compat_sys_sched_getaffinity
.llong .sys_ni_syscall
.llong .sys_ni_syscall /* 225 - reserved for tux */
.llong .compat_sys_sendfile64
.llong .compat_sys_io_setup
.llong .sys_io_destroy
.llong .compat_sys_io_getevents
.llong .compat_sys_io_submit
.llong .sys_io_cancel
.llong .sys_set_tid_address
.llong .ppc32_fadvise64
.llong .sys_exit_group
.llong .ppc32_lookup_dcookie /* 235 */
.llong .sys_epoll_create
.llong .sys_epoll_ctl
.llong .sys_epoll_wait
.llong .sys_remap_file_pages
.llong .ppc32_timer_create /* 240 */
.llong .compat_sys_timer_settime
.llong .compat_sys_timer_gettime
.llong .sys_timer_getoverrun
.llong .sys_timer_delete
.llong .compat_sys_clock_settime/* 245 */
.llong .compat_sys_clock_gettime
.llong .compat_sys_clock_getres
.llong .compat_sys_clock_nanosleep
.llong .ppc32_swapcontext
.llong .compat_sys_tgkill /* 250 */
.llong .compat_sys_utimes
.llong .compat_sys_statfs64
.llong .compat_sys_fstatfs64
.llong .ppc_fadvise64_64 /* 32bit only fadvise64_64 */
.llong .ppc_rtas /* 255 */
.llong .sys_ni_syscall /* 256 reserved for sys_debug_setcontext */
.llong .sys_ni_syscall /* 257 reserved for vserver */
.llong .sys_ni_syscall /* 258 reserved for new sys_remap_file_pages */
.llong .compat_sys_mbind
.llong .compat_sys_get_mempolicy /* 260 */
.llong .compat_sys_set_mempolicy
.llong .compat_sys_mq_open
.llong .sys_mq_unlink
.llong .compat_sys_mq_timedsend
.llong .compat_sys_mq_timedreceive /* 265 */
.llong .compat_sys_mq_notify
.llong .compat_sys_mq_getsetattr
.llong .compat_sys_kexec_load
.llong .compat_sys_add_key
.llong .compat_sys_request_key /* 270 */
.llong .compat_sys_keyctl
.llong .compat_sys_waitid
.llong .compat_sys_ioprio_set
.llong .compat_sys_ioprio_get
.llong .sys_inotify_init /* 275 */
.llong .sys_inotify_add_watch
.llong .sys_inotify_rm_watch
.balign 8
_GLOBAL(sys_call_table)
.llong .sys_restart_syscall /* 0 */
.llong .sys_exit
.llong .ppc_fork
.llong .sys_read
.llong .sys_write
.llong .sys_open /* 5 */
.llong .sys_close
.llong .sys_waitpid
.llong .sys_creat
.llong .sys_link
.llong .sys_unlink /* 10 */
.llong .sys_execve
.llong .sys_chdir
.llong .sys64_time
.llong .sys_mknod
.llong .sys_chmod /* 15 */
.llong .sys_lchown
.llong .sys_ni_syscall /* old break syscall */
.llong .sys_ni_syscall /* old stat syscall */
.llong .sys_lseek
.llong .sys_getpid /* 20 */
.llong .sys_mount
.llong .sys_ni_syscall /* old umount syscall */
.llong .sys_setuid
.llong .sys_getuid
.llong .sys_stime /* 25 */
.llong .sys_ptrace
.llong .sys_alarm
.llong .sys_ni_syscall /* old fstat syscall */
.llong .sys_pause
.llong .sys_utime /* 30 */
.llong .sys_ni_syscall /* old stty syscall */
.llong .sys_ni_syscall /* old gtty syscall */
.llong .sys_access
.llong .sys_nice
.llong .sys_ni_syscall /* 35 - old ftime syscall */
.llong .sys_sync
.llong .sys_kill
.llong .sys_rename
.llong .sys_mkdir
.llong .sys_rmdir /* 40 */
.llong .sys_dup
.llong .sys_pipe
.llong .sys_times
.llong .sys_ni_syscall /* old prof syscall */
.llong .sys_brk /* 45 */
.llong .sys_setgid
.llong .sys_getgid
.llong .sys_signal
.llong .sys_geteuid
.llong .sys_getegid /* 50 */
.llong .sys_acct
.llong .sys_umount
.llong .sys_ni_syscall /* old lock syscall */
.llong .sys_ioctl
.llong .sys_fcntl /* 55 */
.llong .sys_ni_syscall /* old mpx syscall */
.llong .sys_setpgid
.llong .sys_ni_syscall /* old ulimit syscall */
.llong .sys_ni_syscall /* old uname syscall */
.llong .sys_umask /* 60 */
.llong .sys_chroot
.llong .sys_ustat
.llong .sys_dup2
.llong .sys_getppid
.llong .sys_getpgrp /* 65 */
.llong .sys_setsid
.llong .sys_ni_syscall
.llong .sys_sgetmask
.llong .sys_ssetmask
.llong .sys_setreuid /* 70 */
.llong .sys_setregid
.llong .sys_ni_syscall
.llong .sys_ni_syscall
.llong .sys_sethostname
.llong .sys_setrlimit /* 75 */
.llong .sys_ni_syscall /* old getrlimit syscall */
.llong .sys_getrusage
.llong .sys_gettimeofday
.llong .sys_settimeofday
.llong .sys_getgroups /* 80 */
.llong .sys_setgroups
.llong .sys_ni_syscall /* old select syscall */
.llong .sys_symlink
.llong .sys_ni_syscall /* old lstat syscall */
.llong .sys_readlink /* 85 */
.llong .sys_uselib
.llong .sys_swapon
.llong .sys_reboot
.llong .sys_ni_syscall /* old readdir syscall */
.llong .sys_mmap /* 90 */
.llong .sys_munmap
.llong .sys_truncate
.llong .sys_ftruncate
.llong .sys_fchmod
.llong .sys_fchown /* 95 */
.llong .sys_getpriority
.llong .sys_setpriority
.llong .sys_ni_syscall /* old profil syscall holder */
.llong .sys_statfs
.llong .sys_fstatfs /* 100 */
.llong .sys_ni_syscall /* old ioperm syscall */
.llong .sys_socketcall
.llong .sys_syslog
.llong .sys_setitimer
.llong .sys_getitimer /* 105 */
.llong .sys_newstat
.llong .sys_newlstat
.llong .sys_newfstat
.llong .sys_ni_syscall /* old uname syscall */
.llong .sys_ni_syscall /* 110 old iopl syscall */
.llong .sys_vhangup
.llong .sys_ni_syscall /* old idle syscall */
.llong .sys_ni_syscall /* old vm86 syscall */
.llong .sys_wait4
.llong .sys_swapoff /* 115 */
.llong .sys_sysinfo
.llong .sys_ipc
.llong .sys_fsync
.llong .sys_ni_syscall
.llong .ppc_clone /* 120 */
.llong .sys_setdomainname
.llong .ppc_newuname
.llong .sys_ni_syscall /* old modify_ldt syscall */
.llong .sys_adjtimex
.llong .sys_mprotect /* 125 */
.llong .sys_ni_syscall
.llong .sys_ni_syscall /* old create_module syscall */
.llong .sys_init_module
.llong .sys_delete_module
.llong .sys_ni_syscall /* 130 old get_kernel_syms syscall */
.llong .sys_quotactl
.llong .sys_getpgid
.llong .sys_fchdir
.llong .sys_bdflush
.llong .sys_sysfs /* 135 */
.llong .ppc64_personality
.llong .sys_ni_syscall /* for afs_syscall */
.llong .sys_setfsuid
.llong .sys_setfsgid
.llong .sys_llseek /* 140 */
.llong .sys_getdents
.llong .sys_select
.llong .sys_flock
.llong .sys_msync
.llong .sys_readv /* 145 */
.llong .sys_writev
.llong .sys_getsid
.llong .sys_fdatasync
.llong .sys_sysctl
.llong .sys_mlock /* 150 */
.llong .sys_munlock
.llong .sys_mlockall
.llong .sys_munlockall
.llong .sys_sched_setparam
.llong .sys_sched_getparam /* 155 */
.llong .sys_sched_setscheduler
.llong .sys_sched_getscheduler
.llong .sys_sched_yield
.llong .sys_sched_get_priority_max
.llong .sys_sched_get_priority_min /* 160 */
.llong .sys_sched_rr_get_interval
.llong .sys_nanosleep
.llong .sys_mremap
.llong .sys_setresuid
.llong .sys_getresuid /* 165 */
.llong .sys_ni_syscall /* old query_module syscall */
.llong .sys_poll
.llong .sys_nfsservctl
.llong .sys_setresgid
.llong .sys_getresgid /* 170 */
.llong .sys_prctl
.llong .ppc64_rt_sigreturn
.llong .sys_rt_sigaction
.llong .sys_rt_sigprocmask
.llong .sys_rt_sigpending /* 175 */
.llong .sys_rt_sigtimedwait
.llong .sys_rt_sigqueueinfo
.llong .ppc64_rt_sigsuspend
.llong .sys_pread64
.llong .sys_pwrite64 /* 180 */
.llong .sys_chown
.llong .sys_getcwd
.llong .sys_capget
.llong .sys_capset
.llong .sys_sigaltstack /* 185 */
.llong .sys_sendfile64
.llong .sys_ni_syscall /* reserved for streams1 */
.llong .sys_ni_syscall /* reserved for streams2 */
.llong .ppc_vfork
.llong .sys_getrlimit /* 190 */
.llong .sys_readahead
.llong .sys_ni_syscall /* 32bit only mmap2 */
.llong .sys_ni_syscall /* 32bit only truncate64 */
.llong .sys_ni_syscall /* 32bit only ftruncate64 */
.llong .sys_ni_syscall /* 195 - 32bit only stat64 */
.llong .sys_ni_syscall /* 32bit only lstat64 */
.llong .sys_ni_syscall /* 32bit only fstat64 */
.llong .sys_pciconfig_read
.llong .sys_pciconfig_write
.llong .sys_pciconfig_iobase /* 200 - pciconfig_iobase */
.llong .sys_ni_syscall /* reserved for MacOnLinux */
.llong .sys_getdents64
.llong .sys_pivot_root
.llong .sys_ni_syscall /* 32bit only fcntl64 */
.llong .sys_madvise /* 205 */
.llong .sys_mincore
.llong .sys_gettid
.llong .sys_tkill
.llong .sys_setxattr
.llong .sys_lsetxattr /* 210 */
.llong .sys_fsetxattr
.llong .sys_getxattr
.llong .sys_lgetxattr
.llong .sys_fgetxattr
.llong .sys_listxattr /* 215 */
.llong .sys_llistxattr
.llong .sys_flistxattr
.llong .sys_removexattr
.llong .sys_lremovexattr
.llong .sys_fremovexattr /* 220 */
.llong .sys_futex
.llong .sys_sched_setaffinity
.llong .sys_sched_getaffinity
.llong .sys_ni_syscall
.llong .sys_ni_syscall /* 225 - reserved for tux */
.llong .sys_ni_syscall /* 32bit only sendfile64 */
.llong .sys_io_setup
.llong .sys_io_destroy
.llong .sys_io_getevents
.llong .sys_io_submit /* 230 */
.llong .sys_io_cancel
.llong .sys_set_tid_address
.llong .sys_fadvise64
.llong .sys_exit_group
.llong .sys_lookup_dcookie /* 235 */
.llong .sys_epoll_create
.llong .sys_epoll_ctl
.llong .sys_epoll_wait
.llong .sys_remap_file_pages
.llong .sys_timer_create /* 240 */
.llong .sys_timer_settime
.llong .sys_timer_gettime
.llong .sys_timer_getoverrun
.llong .sys_timer_delete
.llong .sys_clock_settime /* 245 */
.llong .sys_clock_gettime
.llong .sys_clock_getres
.llong .sys_clock_nanosleep
.llong .ppc64_swapcontext
.llong .sys_tgkill /* 250 */
.llong .sys_utimes
.llong .sys_statfs64
.llong .sys_fstatfs64
.llong .sys_ni_syscall /* 32bit only fadvise64_64 */
.llong .ppc_rtas /* 255 */
.llong .sys_ni_syscall /* 256 reserved for sys_debug_setcontext */
.llong .sys_ni_syscall /* 257 reserved for vserver */
.llong .sys_ni_syscall /* 258 reserved for new sys_remap_file_pages */
.llong .sys_mbind
.llong .sys_get_mempolicy /* 260 */
.llong .sys_set_mempolicy
.llong .sys_mq_open
.llong .sys_mq_unlink
.llong .sys_mq_timedsend
.llong .sys_mq_timedreceive /* 265 */
.llong .sys_mq_notify
.llong .sys_mq_getsetattr
.llong .sys_kexec_load
.llong .sys_add_key
.llong .sys_request_key /* 270 */
.llong .sys_keyctl
.llong .sys_waitid
.llong .sys_ioprio_set
.llong .sys_ioprio_get
.llong .sys_inotify_init /* 275 */
.llong .sys_inotify_add_watch
.llong .sys_inotify_rm_watch

15
arch/ppc64/lib/Makefile
View File

@ -2,17 +2,4 @@
# Makefile for ppc64-specific library files..
#
lib-y := checksum.o string.o strcase.o
lib-y += copypage.o memcpy.o copyuser.o usercopy.o
# Lock primitives are defined as no-ops in include/linux/spinlock.h
# for non-SMP configs. Don't build the real versions.
lib-$(CONFIG_SMP) += locks.o
# e2a provides EBCDIC to ASCII conversions.
ifdef CONFIG_PPC_ISERIES
obj-y += e2a.o
endif
lib-$(CONFIG_DEBUG_KERNEL) += sstep.o
lib-y := string.o

229
arch/ppc64/lib/checksum.S
View File

@ -1,229 +0,0 @@
/*
* This file contains assembly-language implementations
* of IP-style 1's complement checksum routines.
*
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Severely hacked about by Paul Mackerras (paulus@cs.anu.edu.au).
*/
#include <linux/sys.h>
#include <asm/processor.h>
#include <asm/errno.h>
#include <asm/ppc_asm.h>
/*
* ip_fast_csum(r3=buf, r4=len) -- Optimized for IP header
* len is in words and is always >= 5.
*
* In practice len == 5, but this is not guaranteed. So this code does not
* attempt to use doubleword instructions.
*/
_GLOBAL(ip_fast_csum)
lwz r0,0(r3)
lwzu r5,4(r3)
addic. r4,r4,-2
addc r0,r0,r5
mtctr r4
blelr-
1: lwzu r4,4(r3)
adde r0,r0,r4
bdnz 1b
addze r0,r0 /* add in final carry */
rldicl r4,r0,32,0 /* fold two 32-bit halves together */
add r0,r0,r4
srdi r0,r0,32
rlwinm r3,r0,16,0,31 /* fold two halves together */
add r3,r0,r3
not r3,r3
srwi r3,r3,16
blr
/*
* Compute checksum of TCP or UDP pseudo-header:
* csum_tcpudp_magic(r3=saddr, r4=daddr, r5=len, r6=proto, r7=sum)
* No real gain trying to do this specially for 64 bit, but
* the 32 bit addition may spill into the upper bits of
* the doubleword so we still must fold it down from 64.
*/
_GLOBAL(csum_tcpudp_magic)
rlwimi r5,r6,16,0,15 /* put proto in upper half of len */
addc r0,r3,r4 /* add 4 32-bit words together */
adde r0,r0,r5
adde r0,r0,r7
rldicl r4,r0,32,0 /* fold 64 bit value */
add r0,r4,r0
srdi r0,r0,32
rlwinm r3,r0,16,0,31 /* fold two halves together */
add r3,r0,r3
not r3,r3
srwi r3,r3,16
blr
/*
* Computes the checksum of a memory block at buff, length len,
* and adds in "sum" (32-bit).
*
* This code assumes at least halfword alignment, though the length
* can be any number of bytes. The sum is accumulated in r5.
*
* csum_partial(r3=buff, r4=len, r5=sum)
*/
_GLOBAL(csum_partial)
subi r3,r3,8 /* we'll offset by 8 for the loads */
srdi. r6,r4,3 /* divide by 8 for doubleword count */
addic r5,r5,0 /* clear carry */
beq 3f /* if we're doing < 8 bytes */
andi. r0,r3,2 /* aligned on a word boundary already? */
beq+ 1f
lhz r6,8(r3) /* do 2 bytes to get aligned */
addi r3,r3,2
subi r4,r4,2
addc r5,r5,r6
srdi. r6,r4,3 /* recompute number of doublewords */
beq 3f /* any left? */
1: mtctr r6
2: ldu r6,8(r3) /* main sum loop */
adde r5,r5,r6
bdnz 2b
andi. r4,r4,7 /* compute bytes left to sum after doublewords */
3: cmpwi 0,r4,4 /* is at least a full word left? */
blt 4f
lwz r6,8(r3) /* sum this word */
addi r3,r3,4
subi r4,r4,4
adde r5,r5,r6
4: cmpwi 0,r4,2 /* is at least a halfword left? */
blt+ 5f
lhz r6,8(r3) /* sum this halfword */
addi r3,r3,2
subi r4,r4,2
adde r5,r5,r6
5: cmpwi 0,r4,1 /* is at least a byte left? */
bne+ 6f
lbz r6,8(r3) /* sum this byte */
slwi r6,r6,8 /* this byte is assumed to be the upper byte of a halfword */
adde r5,r5,r6
6: addze r5,r5 /* add in final carry */
rldicl r4,r5,32,0 /* fold two 32-bit halves together */
add r3,r4,r5
srdi r3,r3,32
blr
/*
* Computes the checksum of a memory block at src, length len,
* and adds in "sum" (32-bit), while copying the block to dst.
* If an access exception occurs on src or dst, it stores -EFAULT
* to *src_err or *dst_err respectively, and (for an error on
* src) zeroes the rest of dst.
*
* This code needs to be reworked to take advantage of 64 bit sum+copy.
* However, due to tokenring halfword alignment problems this will be very
* tricky. For now we'll leave it until we instrument it somehow.
*
* csum_partial_copy_generic(r3=src, r4=dst, r5=len, r6=sum, r7=src_err, r8=dst_err)
*/
_GLOBAL(csum_partial_copy_generic)
addic r0,r6,0
subi r3,r3,4
subi r4,r4,4
srwi. r6,r5,2
beq 3f /* if we're doing < 4 bytes */
andi. r9,r4,2 /* Align dst to longword boundary */
beq+ 1f
81: lhz r6,4(r3) /* do 2 bytes to get aligned */
addi r3,r3,2
subi r5,r5,2
91: sth r6,4(r4)
addi r4,r4,2
addc r0,r0,r6
srwi. r6,r5,2 /* # words to do */
beq 3f
1: mtctr r6
82: lwzu r6,4(r3) /* the bdnz has zero overhead, so it should */
92: stwu r6,4(r4) /* be unnecessary to unroll this loop */
adde r0,r0,r6
bdnz 82b
andi. r5,r5,3
3: cmpwi 0,r5,2
blt+ 4f
83: lhz r6,4(r3)
addi r3,r3,2
subi r5,r5,2
93: sth r6,4(r4)
addi r4,r4,2
adde r0,r0,r6
4: cmpwi 0,r5,1
bne+ 5f
84: lbz r6,4(r3)
94: stb r6,4(r4)
slwi r6,r6,8 /* Upper byte of word */
adde r0,r0,r6
5: addze r3,r0 /* add in final carry (unlikely with 64-bit regs) */
rldicl r4,r3,32,0 /* fold 64 bit value */
add r3,r4,r3
srdi r3,r3,32
blr
/* These shouldn't go in the fixup section, since that would
cause the ex_table addresses to get out of order. */
.globl src_error_1
src_error_1:
li r6,0
subi r5,r5,2
95: sth r6,4(r4)
addi r4,r4,2
srwi. r6,r5,2
beq 3f
mtctr r6
.globl src_error_2
src_error_2:
li r6,0
96: stwu r6,4(r4)
bdnz 96b
3: andi. r5,r5,3
beq src_error
.globl src_error_3
src_error_3:
li r6,0
mtctr r5
addi r4,r4,3
97: stbu r6,1(r4)
bdnz 97b
.globl src_error
src_error:
cmpdi 0,r7,0
beq 1f
li r6,-EFAULT
stw r6,0(r7)
1: addze r3,r0
blr
.globl dst_error
dst_error:
cmpdi 0,r8,0
beq 1f
li r6,-EFAULT
stw r6,0(r8)
1: addze r3,r0
blr
.section __ex_table,"a"
.align 3
.llong 81b,src_error_1
.llong 91b,dst_error
.llong 82b,src_error_2
.llong 92b,dst_error
.llong 83b,src_error_3
.llong 93b,dst_error
.llong 84b,src_error_3
.llong 94b,dst_error
.llong 95b,dst_error
.llong 96b,dst_error
.llong 97b,dst_error

121
arch/ppc64/lib/copypage.S
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@ -1,121 +0,0 @@
/*
* arch/ppc64/lib/copypage.S
*
* Copyright (C) 2002 Paul Mackerras, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <asm/processor.h>
#include <asm/ppc_asm.h>
_GLOBAL(copy_page)
std r31,-8(1)
std r30,-16(1)
std r29,-24(1)
std r28,-32(1)
std r27,-40(1)
std r26,-48(1)
std r25,-56(1)
std r24,-64(1)
std r23,-72(1)
std r22,-80(1)
std r21,-88(1)
std r20,-96(1)
li r5,4096/32 - 1
addi r3,r3,-8
li r12,5
0: addi r5,r5,-24
mtctr r12
ld r22,640(4)
ld r21,512(4)
ld r20,384(4)
ld r11,256(4)
ld r9,128(4)
ld r7,0(4)
ld r25,648(4)
ld r24,520(4)
ld r23,392(4)
ld r10,264(4)
ld r8,136(4)
ldu r6,8(4)
cmpwi r5,24
1: std r22,648(3)
std r21,520(3)
std r20,392(3)
std r11,264(3)
std r9,136(3)
std r7,8(3)
ld r28,648(4)
ld r27,520(4)
ld r26,392(4)
ld r31,264(4)
ld r30,136(4)
ld r29,8(4)
std r25,656(3)
std r24,528(3)
std r23,400(3)
std r10,272(3)
std r8,144(3)
std r6,16(3)
ld r22,656(4)
ld r21,528(4)
ld r20,400(4)
ld r11,272(4)
ld r9,144(4)
ld r7,16(4)
std r28,664(3)
std r27,536(3)
std r26,408(3)
std r31,280(3)
std r30,152(3)
stdu r29,24(3)
ld r25,664(4)
ld r24,536(4)
ld r23,408(4)
ld r10,280(4)
ld r8,152(4)
ldu r6,24(4)
bdnz 1b
std r22,648(3)
std r21,520(3)
std r20,392(3)
std r11,264(3)
std r9,136(3)
std r7,8(3)
addi r4,r4,640
addi r3,r3,648
bge 0b
mtctr r5
ld r7,0(4)
ld r8,8(4)
ldu r9,16(4)
3: ld r10,8(4)
std r7,8(3)
ld r7,16(4)
std r8,16(3)
ld r8,24(4)
std r9,24(3)
ldu r9,32(4)
stdu r10,32(3)
bdnz 3b
4: ld r10,8(4)
std r7,8(3)
std r8,16(3)
std r9,24(3)
std r10,32(3)
9: ld r20,-96(1)
ld r21,-88(1)
ld r22,-80(1)
ld r23,-72(1)
ld r24,-64(1)
ld r25,-56(1)
ld r26,-48(1)
ld r27,-40(1)
ld r28,-32(1)
ld r29,-24(1)
ld r30,-16(1)
ld r31,-8(1)
blr

576
arch/ppc64/lib/copyuser.S
View File

@ -1,576 +0,0 @@
/*
* arch/ppc64/lib/copyuser.S
*
* Copyright (C) 2002 Paul Mackerras, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <asm/processor.h>
#include <asm/ppc_asm.h>
.align 7
_GLOBAL(__copy_tofrom_user)
/* first check for a whole page copy on a page boundary */
cmpldi cr1,r5,16
cmpdi cr6,r5,4096
or r0,r3,r4
neg r6,r3 /* LS 3 bits = # bytes to 8-byte dest bdry */
andi. r0,r0,4095
std r3,-24(r1)
crand cr0*4+2,cr0*4+2,cr6*4+2
std r4,-16(r1)
std r5,-8(r1)
dcbt 0,r4
beq .Lcopy_page
andi. r6,r6,7
mtcrf 0x01,r5
blt cr1,.Lshort_copy
bne .Ldst_unaligned
.Ldst_aligned:
andi. r0,r4,7
addi r3,r3,-16
bne .Lsrc_unaligned
srdi r7,r5,4
20: ld r9,0(r4)
addi r4,r4,-8
mtctr r7
andi. r5,r5,7
bf cr7*4+0,22f
addi r3,r3,8
addi r4,r4,8
mr r8,r9
blt cr1,72f
21: ld r9,8(r4)
70: std r8,8(r3)
22: ldu r8,16(r4)
71: stdu r9,16(r3)
bdnz 21b
72: std r8,8(r3)
beq+ 3f
addi r3,r3,16
23: ld r9,8(r4)
.Ldo_tail:
bf cr7*4+1,1f
rotldi r9,r9,32
73: stw r9,0(r3)
addi r3,r3,4
1: bf cr7*4+2,2f
rotldi r9,r9,16
74: sth r9,0(r3)
addi r3,r3,2
2: bf cr7*4+3,3f
rotldi r9,r9,8
75: stb r9,0(r3)
3: li r3,0
blr
.Lsrc_unaligned:
srdi r6,r5,3
addi r5,r5,-16
subf r4,r0,r4
srdi r7,r5,4
sldi r10,r0,3
cmpldi cr6,r6,3
andi. r5,r5,7
mtctr r7
subfic r11,r10,64
add r5,r5,r0
bt cr7*4+0,28f
24: ld r9,0(r4) /* 3+2n loads, 2+2n stores */
25: ld r0,8(r4)
sld r6,r9,r10
26: ldu r9,16(r4)
srd r7,r0,r11
sld r8,r0,r10
or r7,r7,r6
blt cr6,79f
27: ld r0,8(r4)
b 2f
28: ld r0,0(r4) /* 4+2n loads, 3+2n stores */
29: ldu r9,8(r4)
sld r8,r0,r10
addi r3,r3,-8
blt cr6,5f
30: ld r0,8(r4)
srd r12,r9,r11
sld r6,r9,r10
31: ldu r9,16(r4)
or r12,r8,r12
srd r7,r0,r11
sld r8,r0,r10
addi r3,r3,16
beq cr6,78f
1: or r7,r7,r6
32: ld r0,8(r4)
76: std r12,8(r3)
2: srd r12,r9,r11
sld r6,r9,r10
33: ldu r9,16(r4)
or r12,r8,r12
77: stdu r7,16(r3)
srd r7,r0,r11
sld r8,r0,r10
bdnz 1b
78: std r12,8(r3)
or r7,r7,r6
79: std r7,16(r3)
5: srd r12,r9,r11
or r12,r8,r12
80: std r12,24(r3)
bne 6f
li r3,0
blr
6: cmpwi cr1,r5,8
addi r3,r3,32
sld r9,r9,r10
ble cr1,.Ldo_tail
34: ld r0,8(r4)
srd r7,r0,r11
or r9,r7,r9
b .Ldo_tail
.Ldst_unaligned:
mtcrf 0x01,r6 /* put #bytes to 8B bdry into cr7 */
subf r5,r6,r5
li r7,0
cmpldi r1,r5,16
bf cr7*4+3,1f
35: lbz r0,0(r4)
81: stb r0,0(r3)
addi r7,r7,1
1: bf cr7*4+2,2f
36: lhzx r0,r7,r4
82: sthx r0,r7,r3
addi r7,r7,2
2: bf cr7*4+1,3f
37: lwzx r0,r7,r4
83: stwx r0,r7,r3
3: mtcrf 0x01,r5
add r4,r6,r4
add r3,r6,r3
b .Ldst_aligned
.Lshort_copy:
bf cr7*4+0,1f
38: lwz r0,0(r4)
39: lwz r9,4(r4)
addi r4,r4,8
84: stw r0,0(r3)
85: stw r9,4(r3)
addi r3,r3,8
1: bf cr7*4+1,2f
40: lwz r0,0(r4)
addi r4,r4,4
86: stw r0,0(r3)
addi r3,r3,4
2: bf cr7*4+2,3f
41: lhz r0,0(r4)
addi r4,r4,2
87: sth r0,0(r3)
addi r3,r3,2
3: bf cr7*4+3,4f
42: lbz r0,0(r4)
88: stb r0,0(r3)
4: li r3,0
blr
/*
* exception handlers follow
* we have to return the number of bytes not copied
* for an exception on a load, we set the rest of the destination to 0
*/
136:
137:
add r3,r3,r7
b 1f
130:
131:
addi r3,r3,8
120:
122:
124:
125:
126:
127:
128:
129:
133:
addi r3,r3,8
121:
132:
addi r3,r3,8
123:
134:
135:
138:
139:
140:
141:
142:
/*
* here we have had a fault on a load and r3 points to the first
* unmodified byte of the destination
*/
1: ld r6,-24(r1)
ld r4,-16(r1)
ld r5,-8(r1)
subf r6,r6,r3
add r4,r4,r6
subf r5,r6,r5 /* #bytes left to go */
/*
* first see if we can copy any more bytes before hitting another exception
*/
mtctr r5
43: lbz r0,0(r4)
addi r4,r4,1
89: stb r0,0(r3)
addi r3,r3,1
bdnz 43b
li r3,0 /* huh? all copied successfully this time? */
blr
/*
* here we have trapped again, need to clear ctr bytes starting at r3
*/
143: mfctr r5
li r0,0
mr r4,r3
mr r3,r5 /* return the number of bytes not copied */
1: andi. r9,r4,7
beq 3f
90: stb r0,0(r4)
addic. r5,r5,-1
addi r4,r4,1
bne 1b
blr
3: cmpldi cr1,r5,8
srdi r9,r5,3
andi. r5,r5,7
blt cr1,93f
mtctr r9
91: std r0,0(r4)
addi r4,r4,8
bdnz 91b
93: beqlr
mtctr r5
92: stb r0,0(r4)
addi r4,r4,1
bdnz 92b
blr
/*
* exception handlers for stores: we just need to work
* out how many bytes weren't copied
*/
182:
183:
add r3,r3,r7
b 1f
180:
addi r3,r3,8
171:
177:
addi r3,r3,8
170:
172:
176:
178:
addi r3,r3,4
185:
addi r3,r3,4
173:
174:
175:
179:
181:
184:
186:
187:
188:
189:
1:
ld r6,-24(r1)
ld r5,-8(r1)
add r6,r6,r5
subf r3,r3,r6 /* #bytes not copied */
190:
191:
192:
blr /* #bytes not copied in r3 */
.section __ex_table,"a"
.align 3
.llong 20b,120b
.llong 21b,121b
.llong 70b,170b
.llong 22b,122b
.llong 71b,171b
.llong 72b,172b
.llong 23b,123b
.llong 73b,173b
.llong 74b,174b
.llong 75b,175b
.llong 24b,124b
.llong 25b,125b
.llong 26b,126b
.llong 27b,127b
.llong 28b,128b
.llong 29b,129b
.llong 30b,130b
.llong 31b,131b
.llong 32b,132b
.llong 76b,176b
.llong 33b,133b
.llong 77b,177b
.llong 78b,178b
.llong 79b,179b
.llong 80b,180b
.llong 34b,134b
.llong 35b,135b
.llong 81b,181b
.llong 36b,136b
.llong 82b,182b
.llong 37b,137b
.llong 83b,183b
.llong 38b,138b
.llong 39b,139b
.llong 84b,184b
.llong 85b,185b
.llong 40b,140b
.llong 86b,186b
.llong 41b,141b
.llong 87b,187b
.llong 42b,142b
.llong 88b,188b
.llong 43b,143b
.llong 89b,189b
.llong 90b,190b
.llong 91b,191b
.llong 92b,192b
.text
/*
* Routine to copy a whole page of data, optimized for POWER4.
* On POWER4 it is more than 50% faster than the simple loop
* above (following the .Ldst_aligned label) but it runs slightly
* slower on POWER3.
*/
.Lcopy_page:
std r31,-32(1)
std r30,-40(1)
std r29,-48(1)
std r28,-56(1)
std r27,-64(1)
std r26,-72(1)
std r25,-80(1)
std r24,-88(1)
std r23,-96(1)
std r22,-104(1)
std r21,-112(1)
std r20,-120(1)
li r5,4096/32 - 1
addi r3,r3,-8
li r0,5
0: addi r5,r5,-24
mtctr r0
20: ld r22,640(4)
21: ld r21,512(4)
22: ld r20,384(4)
23: ld r11,256(4)
24: ld r9,128(4)
25: ld r7,0(4)
26: ld r25,648(4)
27: ld r24,520(4)
28: ld r23,392(4)
29: ld r10,264(4)
30: ld r8,136(4)
31: ldu r6,8(4)
cmpwi r5,24
1:
32: std r22,648(3)
33: std r21,520(3)
34: std r20,392(3)
35: std r11,264(3)
36: std r9,136(3)
37: std r7,8(3)
38: ld r28,648(4)
39: ld r27,520(4)
40: ld r26,392(4)
41: ld r31,264(4)
42: ld r30,136(4)
43: ld r29,8(4)
44: std r25,656(3)
45: std r24,528(3)
46: std r23,400(3)
47: std r10,272(3)
48: std r8,144(3)
49: std r6,16(3)
50: ld r22,656(4)
51: ld r21,528(4)
52: ld r20,400(4)
53: ld r11,272(4)
54: ld r9,144(4)
55: ld r7,16(4)
56: std r28,664(3)
57: std r27,536(3)
58: std r26,408(3)
59: std r31,280(3)
60: std r30,152(3)
61: stdu r29,24(3)
62: ld r25,664(4)
63: ld r24,536(4)
64: ld r23,408(4)
65: ld r10,280(4)
66: ld r8,152(4)
67: ldu r6,24(4)
bdnz 1b
68: std r22,648(3)
69: std r21,520(3)
70: std r20,392(3)
71: std r11,264(3)
72: std r9,136(3)
73: std r7,8(3)
74: addi r4,r4,640
75: addi r3,r3,648
bge 0b
mtctr r5
76: ld r7,0(4)
77: ld r8,8(4)
78: ldu r9,16(4)
3:
79: ld r10,8(4)
80: std r7,8(3)
81: ld r7,16(4)
82: std r8,16(3)
83: ld r8,24(4)
84: std r9,24(3)
85: ldu r9,32(4)
86: stdu r10,32(3)
bdnz 3b
4:
87: ld r10,8(4)
88: std r7,8(3)
89: std r8,16(3)
90: std r9,24(3)
91: std r10,32(3)
9: ld r20,-120(1)
ld r21,-112(1)
ld r22,-104(1)
ld r23,-96(1)
ld r24,-88(1)
ld r25,-80(1)
ld r26,-72(1)
ld r27,-64(1)
ld r28,-56(1)
ld r29,-48(1)
ld r30,-40(1)
ld r31,-32(1)
li r3,0
blr
/*
* on an exception, reset to the beginning and jump back into the
* standard __copy_tofrom_user
*/
100: ld r20,-120(1)
ld r21,-112(1)
ld r22,-104(1)
ld r23,-96(1)
ld r24,-88(1)
ld r25,-80(1)
ld r26,-72(1)
ld r27,-64(1)
ld r28,-56(1)
ld r29,-48(1)
ld r30,-40(1)
ld r31,-32(1)
ld r3,-24(r1)
ld r4,-16(r1)
li r5,4096
b .Ldst_aligned
.section __ex_table,"a"
.align 3
.llong 20b,100b
.llong 21b,100b
.llong 22b,100b
.llong 23b,100b
.llong 24b,100b
.llong 25b,100b
.llong 26b,100b
.llong 27b,100b
.llong 28b,100b
.llong 29b,100b
.llong 30b,100b
.llong 31b,100b
.llong 32b,100b
.llong 33b,100b
.llong 34b,100b
.llong 35b,100b
.llong 36b,100b
.llong 37b,100b
.llong 38b,100b
.llong 39b,100b
.llong 40b,100b
.llong 41b,100b
.llong 42b,100b
.llong 43b,100b
.llong 44b,100b
.llong 45b,100b
.llong 46b,100b
.llong 47b,100b
.llong 48b,100b
.llong 49b,100b
.llong 50b,100b
.llong 51b,100b
.llong 52b,100b
.llong 53b,100b
.llong 54b,100b
.llong 55b,100b
.llong 56b,100b
.llong 57b,100b
.llong 58b,100b
.llong 59b,100b
.llong 60b,100b
.llong 61b,100b
.llong 62b,100b
.llong 63b,100b
.llong 64b,100b
.llong 65b,100b
.llong 66b,100b
.llong 67b,100b
.llong 68b,100b
.llong 69b,100b
.llong 70b,100b
.llong 71b,100b
.llong 72b,100b
.llong 73b,100b
.llong 74b,100b
.llong 75b,100b
.llong 76b,100b
.llong 77b,100b
.llong 78b,100b
.llong 79b,100b
.llong 80b,100b
.llong 81b,100b
.llong 82b,100b
.llong 83b,100b
.llong 84b,100b
.llong 85b,100b
.llong 86b,100b
.llong 87b,100b
.llong 88b,100b
.llong 89b,100b
.llong 90b,100b
.llong 91b,100b

108
arch/ppc64/lib/e2a.c
View File

@ -1,108 +0,0 @@
/*
* arch/ppc64/lib/e2a.c
*
* EBCDIC to ASCII conversion
*
* This function moved here from arch/ppc64/kernel/viopath.c
*
* (C) Copyright 2000-2004 IBM Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) anyu later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/module.h>
unsigned char e2a(unsigned char x)
{
switch (x) {
case 0xF0:
return '0';
case 0xF1:
return '1';
case 0xF2:
return '2';
case 0xF3:
return '3';
case 0xF4:
return '4';
case 0xF5:
return '5';
case 0xF6:
return '6';
case 0xF7:
return '7';
case 0xF8:
return '8';
case 0xF9:
return '9';
case 0xC1:
return 'A';
case 0xC2:
return 'B';
case 0xC3:
return 'C';
case 0xC4:
return 'D';
case 0xC5:
return 'E';
case 0xC6:
return 'F';
case 0xC7:
return 'G';
case 0xC8:
return 'H';
case 0xC9:
return 'I';
case 0xD1:
return 'J';
case 0xD2:
return 'K';
case 0xD3:
return 'L';
case 0xD4:
return 'M';
case 0xD5:
return 'N';
case 0xD6:
return 'O';
case 0xD7:
return 'P';
case 0xD8:
return 'Q';
case 0xD9:
return 'R';
case 0xE2:
return 'S';
case 0xE3:
return 'T';
case 0xE4:
return 'U';
case 0xE5:
return 'V';
case 0xE6:
return 'W';
case 0xE7:
return 'X';
case 0xE8:
return 'Y';
case 0xE9:
return 'Z';
}
return ' ';
}
EXPORT_SYMBOL(e2a);

95
arch/ppc64/lib/locks.c
View File

@ -1,95 +0,0 @@
/*
* Spin and read/write lock operations.
*
* Copyright (C) 2001-2004 Paul Mackerras <paulus@au.ibm.com>, IBM
* Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
* Copyright (C) 2002 Dave Engebretsen <engebret@us.ibm.com>, IBM
* Rework to support virtual processors
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/stringify.h>
#include <asm/hvcall.h>
#include <asm/iSeries/HvCall.h>
/* waiting for a spinlock... */
#if defined(CONFIG_PPC_SPLPAR) || defined(CONFIG_PPC_ISERIES)
void __spin_yield(raw_spinlock_t *lock)
{
unsigned int lock_value, holder_cpu, yield_count;
struct paca_struct *holder_paca;
lock_value = lock->slock;
if (lock_value == 0)
return;
holder_cpu = lock_value & 0xffff;
BUG_ON(holder_cpu >= NR_CPUS);
holder_paca = &paca[holder_cpu];
yield_count = holder_paca->lppaca.yield_count;
if ((yield_count & 1) == 0)
return; /* virtual cpu is currently running */
rmb();
if (lock->slock != lock_value)
return; /* something has changed */
#ifdef CONFIG_PPC_ISERIES
HvCall2(HvCallBaseYieldProcessor, HvCall_YieldToProc,
((u64)holder_cpu << 32) | yield_count);
#else
plpar_hcall_norets(H_CONFER, get_hard_smp_processor_id(holder_cpu),
yield_count);
#endif
}
/*
* Waiting for a read lock or a write lock on a rwlock...
* This turns out to be the same for read and write locks, since
* we only know the holder if it is write-locked.
*/
void __rw_yield(raw_rwlock_t *rw)
{
int lock_value;
unsigned int holder_cpu, yield_count;
struct paca_struct *holder_paca;
lock_value = rw->lock;
if (lock_value >= 0)
return; /* no write lock at present */
holder_cpu = lock_value & 0xffff;
BUG_ON(holder_cpu >= NR_CPUS);
holder_paca = &paca[holder_cpu];
yield_count = holder_paca->lppaca.yield_count;
if ((yield_count & 1) == 0)
return; /* virtual cpu is currently running */
rmb();
if (rw->lock != lock_value)
return; /* something has changed */
#ifdef CONFIG_PPC_ISERIES
HvCall2(HvCallBaseYieldProcessor, HvCall_YieldToProc,
((u64)holder_cpu << 32) | yield_count);
#else
plpar_hcall_norets(H_CONFER, get_hard_smp_processor_id(holder_cpu),
yield_count);
#endif
}
#endif
void __raw_spin_unlock_wait(raw_spinlock_t *lock)
{
while (lock->slock) {
HMT_low();
if (SHARED_PROCESSOR)
__spin_yield(lock);
}
HMT_medium();
}
EXPORT_SYMBOL(__raw_spin_unlock_wait);

172
arch/ppc64/lib/memcpy.S
View File

@ -1,172 +0,0 @@
/*
* arch/ppc64/lib/memcpy.S
*
* Copyright (C) 2002 Paul Mackerras, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <asm/processor.h>
#include <asm/ppc_asm.h>
.align 7
_GLOBAL(memcpy)
mtcrf 0x01,r5
cmpldi cr1,r5,16
neg r6,r3 # LS 3 bits = # bytes to 8-byte dest bdry
andi. r6,r6,7
dcbt 0,r4
blt cr1,.Lshort_copy
bne .Ldst_unaligned
.Ldst_aligned:
andi. r0,r4,7
addi r3,r3,-16
bne .Lsrc_unaligned
srdi r7,r5,4
ld r9,0(r4)
addi r4,r4,-8
mtctr r7
andi. r5,r5,7
bf cr7*4+0,2f
addi r3,r3,8
addi r4,r4,8
mr r8,r9
blt cr1,3f
1: ld r9,8(r4)
std r8,8(r3)
2: ldu r8,16(r4)
stdu r9,16(r3)
bdnz 1b
3: std r8,8(r3)
beqlr
addi r3,r3,16
ld r9,8(r4)
.Ldo_tail:
bf cr7*4+1,1f
rotldi r9,r9,32
stw r9,0(r3)
addi r3,r3,4
1: bf cr7*4+2,2f
rotldi r9,r9,16
sth r9,0(r3)
addi r3,r3,2
2: bf cr7*4+3,3f
rotldi r9,r9,8
stb r9,0(r3)
3: blr
.Lsrc_unaligned:
srdi r6,r5,3
addi r5,r5,-16
subf r4,r0,r4
srdi r7,r5,4
sldi r10,r0,3
cmpdi cr6,r6,3
andi. r5,r5,7
mtctr r7
subfic r11,r10,64
add r5,r5,r0
bt cr7*4+0,0f
ld r9,0(r4) # 3+2n loads, 2+2n stores
ld r0,8(r4)
sld r6,r9,r10
ldu r9,16(r4)
srd r7,r0,r11
sld r8,r0,r10
or r7,r7,r6
blt cr6,4f
ld r0,8(r4)
# s1<< in r8, d0=(s0<<|s1>>) in r7, s3 in r0, s2 in r9, nix in r6 & r12
b 2f
0: ld r0,0(r4) # 4+2n loads, 3+2n stores
ldu r9,8(r4)
sld r8,r0,r10
addi r3,r3,-8
blt cr6,5f
ld r0,8(r4)
srd r12,r9,r11
sld r6,r9,r10
ldu r9,16(r4)
or r12,r8,r12
srd r7,r0,r11
sld r8,r0,r10
addi r3,r3,16
beq cr6,3f
# d0=(s0<<|s1>>) in r12, s1<< in r6, s2>> in r7, s2<< in r8, s3 in r9
1: or r7,r7,r6
ld r0,8(r4)
std r12,8(r3)
2: srd r12,r9,r11
sld r6,r9,r10
ldu r9,16(r4)
or r12,r8,r12
stdu r7,16(r3)
srd r7,r0,r11
sld r8,r0,r10
bdnz 1b
3: std r12,8(r3)
or r7,r7,r6
4: std r7,16(r3)
5: srd r12,r9,r11
or r12,r8,r12
std r12,24(r3)
beqlr
cmpwi cr1,r5,8
addi r3,r3,32
sld r9,r9,r10
ble cr1,.Ldo_tail
ld r0,8(r4)
srd r7,r0,r11
or r9,r7,r9
b .Ldo_tail
.Ldst_unaligned:
mtcrf 0x01,r6 # put #bytes to 8B bdry into cr7
subf r5,r6,r5
li r7,0
cmpldi r1,r5,16
bf cr7*4+3,1f
lbz r0,0(r4)
stb r0,0(r3)
addi r7,r7,1
1: bf cr7*4+2,2f
lhzx r0,r7,r4
sthx r0,r7,r3
addi r7,r7,2
2: bf cr7*4+1,3f
lwzx r0,r7,r4
stwx r0,r7,r3
3: mtcrf 0x01,r5
add r4,r6,r4
add r3,r6,r3
b .Ldst_aligned
.Lshort_copy:
bf cr7*4+0,1f
lwz r0,0(r4)
lwz r9,4(r4)
addi r4,r4,8
stw r0,0(r3)
stw r9,4(r3)
addi r3,r3,8
1: bf cr7*4+1,2f
lwz r0,0(r4)
addi r4,r4,4
stw r0,0(r3)
addi r3,r3,4
2: bf cr7*4+2,3f
lhz r0,0(r4)
addi r4,r4,2
sth r0,0(r3)
addi r3,r3,2
3: bf cr7*4+3,4f
lbz r0,0(r4)
stb r0,0(r3)
4: blr

141
arch/ppc64/lib/sstep.c
View File

@ -1,141 +0,0 @@
/*
* Single-step support.
*
* Copyright (C) 2004 Paul Mackerras <paulus@au.ibm.com>, IBM
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/ptrace.h>
#include <asm/sstep.h>
#include <asm/processor.h>
extern char system_call_common[];
/* Bits in SRR1 that are copied from MSR */
#define MSR_MASK 0xffffffff87c0ffff
/*
* Determine whether a conditional branch instruction would branch.
*/
static int branch_taken(unsigned int instr, struct pt_regs *regs)
{
unsigned int bo = (instr >> 21) & 0x1f;
unsigned int bi;
if ((bo & 4) == 0) {
/* decrement counter */
--regs->ctr;
if (((bo >> 1) & 1) ^ (regs->ctr == 0))
return 0;
}
if ((bo & 0x10) == 0) {
/* check bit from CR */
bi = (instr >> 16) & 0x1f;
if (((regs->ccr >> (31 - bi)) & 1) != ((bo >> 3) & 1))
return 0;
}
return 1;
}
/*
* Emulate instructions that cause a transfer of control.
* Returns 1 if the step was emulated, 0 if not,
* or -1 if the instruction is one that should not be stepped,
* such as an rfid, or a mtmsrd that would clear MSR_RI.
*/
int emulate_step(struct pt_regs *regs, unsigned int instr)
{
unsigned int opcode, rd;
unsigned long int imm;
opcode = instr >> 26;
switch (opcode) {
case 16: /* bc */
imm = (signed short)(instr & 0xfffc);
if ((instr & 2) == 0)
imm += regs->nip;
regs->nip += 4;
if ((regs->msr & MSR_SF) == 0)
regs->nip &= 0xffffffffUL;
if (instr & 1)
regs->link = regs->nip;
if (branch_taken(instr, regs))
regs->nip = imm;
return 1;
case 17: /* sc */
/*
* N.B. this uses knowledge about how the syscall
* entry code works. If that is changed, this will
* need to be changed also.
*/
regs->gpr[9] = regs->gpr[13];
regs->gpr[11] = regs->nip + 4;
regs->gpr[12] = regs->msr & MSR_MASK;
regs->gpr[13] = (unsigned long) get_paca();
regs->nip = (unsigned long) &system_call_common;
regs->msr = MSR_KERNEL;
return 1;
case 18: /* b */
imm = instr & 0x03fffffc;
if (imm & 0x02000000)
imm -= 0x04000000;
if ((instr & 2) == 0)
imm += regs->nip;
if (instr & 1) {
regs->link = regs->nip + 4;
if ((regs->msr & MSR_SF) == 0)
regs->link &= 0xffffffffUL;
}
if ((regs->msr & MSR_SF) == 0)
imm &= 0xffffffffUL;
regs->nip = imm;
return 1;
case 19:
switch (instr & 0x7fe) {
case 0x20: /* bclr */
case 0x420: /* bcctr */
imm = (instr & 0x400)? regs->ctr: regs->link;
regs->nip += 4;
if ((regs->msr & MSR_SF) == 0) {
regs->nip &= 0xffffffffUL;
imm &= 0xffffffffUL;
}
if (instr & 1)
regs->link = regs->nip;
if (branch_taken(instr, regs))
regs->nip = imm;
return 1;
case 0x24: /* rfid, scary */
return -1;
}
case 31:
rd = (instr >> 21) & 0x1f;
switch (instr & 0x7fe) {
case 0xa6: /* mfmsr */
regs->gpr[rd] = regs->msr & MSR_MASK;
regs->nip += 4;
if ((regs->msr & MSR_SF) == 0)
regs->nip &= 0xffffffffUL;
return 1;
case 0x164: /* mtmsrd */
/* only MSR_EE and MSR_RI get changed if bit 15 set */
/* mtmsrd doesn't change MSR_HV and MSR_ME */
imm = (instr & 0x10000)? 0x8002: 0xefffffffffffefffUL;
imm = (regs->msr & MSR_MASK & ~imm)
| (regs->gpr[rd] & imm);
if ((imm & MSR_RI) == 0)
/* can't step mtmsrd that would clear MSR_RI */
return -1;
regs->msr = imm;
regs->nip += 4;
if ((imm & MSR_SF) == 0)
regs->nip &= 0xffffffffUL;
return 1;
}
}
return 0;
}

31
arch/ppc64/lib/strcase.c
View File

@ -1,31 +0,0 @@
/*
* c 2001 PPC 64 Team, IBM Corp
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/ctype.h>
int strcasecmp(const char *s1, const char *s2)
{
int c1, c2;
do {
c1 = tolower(*s1++);
c2 = tolower(*s2++);
} while (c1 == c2 && c1 != 0);
return c1 - c2;
}
int strncasecmp(const char *s1, const char *s2, int n)
{
int c1, c2;
do {
c1 = tolower(*s1++);
c2 = tolower(*s2++);
} while ((--n > 0) && c1 == c2 && c1 != 0);
return c1 - c2;
}

106
arch/ppc64/lib/string.S
View File

@ -65,112 +65,6 @@ _GLOBAL(strlen)
subf r3,r3,r4
blr
_GLOBAL(memset)
neg r0,r3
rlwimi r4,r4,8,16,23
andi. r0,r0,7 /* # bytes to be 8-byte aligned */
rlwimi r4,r4,16,0,15
cmplw cr1,r5,r0 /* do we get that far? */
rldimi r4,r4,32,0
mtcrf 1,r0
mr r6,r3
blt cr1,8f
beq+ 3f /* if already 8-byte aligned */
subf r5,r0,r5
bf 31,1f
stb r4,0(r6)
addi r6,r6,1
1: bf 30,2f
sth r4,0(r6)
addi r6,r6,2
2: bf 29,3f
stw r4,0(r6)
addi r6,r6,4
3: srdi. r0,r5,6
clrldi r5,r5,58
mtctr r0
beq 5f
4: std r4,0(r6)
std r4,8(r6)
std r4,16(r6)
std r4,24(r6)
std r4,32(r6)
std r4,40(r6)
std r4,48(r6)
std r4,56(r6)
addi r6,r6,64
bdnz 4b
5: srwi. r0,r5,3
clrlwi r5,r5,29
mtcrf 1,r0
beq 8f
bf 29,6f
std r4,0(r6)
std r4,8(r6)
std r4,16(r6)
std r4,24(r6)
addi r6,r6,32
6: bf 30,7f
std r4,0(r6)
std r4,8(r6)
addi r6,r6,16
7: bf 31,8f
std r4,0(r6)
addi r6,r6,8
8: cmpwi r5,0
mtcrf 1,r5
beqlr+
bf 29,9f
stw r4,0(r6)
addi r6,r6,4
9: bf 30,10f
sth r4,0(r6)
addi r6,r6,2
10: bflr 31
stb r4,0(r6)
blr
_GLOBAL(memmove)
cmplw 0,r3,r4
bgt .backwards_memcpy
b .memcpy
_GLOBAL(backwards_memcpy)
rlwinm. r7,r5,32-3,3,31 /* r0 = r5 >> 3 */
add r6,r3,r5
add r4,r4,r5
beq 2f
andi. r0,r6,3
mtctr r7
bne 5f
1: lwz r7,-4(r4)
lwzu r8,-8(r4)
stw r7,-4(r6)
stwu r8,-8(r6)
bdnz 1b
andi. r5,r5,7
2: cmplwi 0,r5,4
blt 3f
lwzu r0,-4(r4)
subi r5,r5,4
stwu r0,-4(r6)
3: cmpwi 0,r5,0
beqlr
mtctr r5
4: lbzu r0,-1(r4)
stbu r0,-1(r6)
bdnz 4b
blr
5: mtctr r0
6: lbzu r7,-1(r4)
stbu r7,-1(r6)
bdnz 6b
subf r5,r0,r5
rlwinm. r7,r5,32-3,3,31
beq 2b
mtctr r7
b 1b
_GLOBAL(memcmp)
cmpwi 0,r5,0
ble- 2f

41
arch/ppc64/lib/usercopy.c
View File

@ -1,41 +0,0 @@
/*
* Functions which are too large to be inlined.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/module.h>
#include <asm/uaccess.h>
unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
{
if (likely(access_ok(VERIFY_READ, from, n)))
n = __copy_from_user(to, from, n);
else
memset(to, 0, n);
return n;
}
unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
{
if (likely(access_ok(VERIFY_WRITE, to, n)))
n = __copy_to_user(to, from, n);
return n;
}
unsigned long copy_in_user(void __user *to, const void __user *from,
unsigned long n)
{
might_sleep();
if (likely(access_ok(VERIFY_READ, from, n) &&
access_ok(VERIFY_WRITE, to, n)))
n =__copy_tofrom_user(to, from, n);
return n;
}
EXPORT_SYMBOL(copy_from_user);
EXPORT_SYMBOL(copy_to_user);
EXPORT_SYMBOL(copy_in_user);