aboutsummaryrefslogtreecommitdiffstats
path: root/arch/parisc/kernel/entry.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/parisc/kernel/entry.S')
-rw-r--r--arch/parisc/kernel/entry.S95
1 files changed, 47 insertions, 48 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 67dda1b0d6da..cec65323d216 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -37,6 +37,8 @@
37#include <asm/unistd.h> 37#include <asm/unistd.h>
38#include <asm/thread_info.h> 38#include <asm/thread_info.h>
39 39
40#include <linux/linkage.h>
41
40#ifdef CONFIG_64BIT 42#ifdef CONFIG_64BIT
41#define CMPIB cmpib,* 43#define CMPIB cmpib,*
42#define CMPB cmpb,* 44#define CMPB cmpb,*
@@ -648,13 +650,11 @@
648 * the static part of the kernel address space. 650 * the static part of the kernel address space.
649 */ 651 */
650 652
651 .export fault_vector_20
652
653 .text 653 .text
654 654
655 .align 4096 655 .align 4096
656 656
657fault_vector_20: 657ENTRY(fault_vector_20)
658 /* First vector is invalid (0) */ 658 /* First vector is invalid (0) */
659 .ascii "cows can fly" 659 .ascii "cows can fly"
660 .byte 0 660 .byte 0
@@ -695,14 +695,13 @@ fault_vector_20:
695 def 29 695 def 29
696 def 30 696 def 30
697 def 31 697 def 31
698END(fault_vector_20)
698 699
699#ifndef CONFIG_64BIT 700#ifndef CONFIG_64BIT
700 701
701 .export fault_vector_11
702
703 .align 2048 702 .align 2048
704 703
705fault_vector_11: 704ENTRY(fault_vector_11)
706 /* First vector is invalid (0) */ 705 /* First vector is invalid (0) */
707 .ascii "cows can fly" 706 .ascii "cows can fly"
708 .byte 0 707 .byte 0
@@ -743,6 +742,7 @@ fault_vector_11:
743 def 29 742 def 29
744 def 30 743 def 30
745 def 31 744 def 31
745END(fault_vector_11)
746 746
747#endif 747#endif
748 748
@@ -762,9 +762,8 @@ fault_vector_11:
762#define CLONE_VM 0x100 /* Must agree with <linux/sched.h> */ 762#define CLONE_VM 0x100 /* Must agree with <linux/sched.h> */
763#define CLONE_UNTRACED 0x00800000 763#define CLONE_UNTRACED 0x00800000
764 764
765 .export __kernel_thread, code
766 .import do_fork 765 .import do_fork
767__kernel_thread: 766ENTRY(__kernel_thread)
768 STREG %r2, -RP_OFFSET(%r30) 767 STREG %r2, -RP_OFFSET(%r30)
769 768
770 copy %r30, %r1 769 copy %r30, %r1
@@ -797,6 +796,7 @@ __kernel_thread:
797 ldo -PT_SZ_ALGN(%r30), %r30 796 ldo -PT_SZ_ALGN(%r30), %r30
798 bv %r0(%r2) 797 bv %r0(%r2)
799 nop 798 nop
799ENDPROC(__kernel_thread)
800 800
801 /* 801 /*
802 * Child Returns here 802 * Child Returns here
@@ -805,8 +805,7 @@ __kernel_thread:
805 * into task save area. 805 * into task save area.
806 */ 806 */
807 807
808 .export ret_from_kernel_thread 808ENTRY(ret_from_kernel_thread)
809ret_from_kernel_thread:
810 809
811 /* Call schedule_tail first though */ 810 /* Call schedule_tail first though */
812 BL schedule_tail, %r2 811 BL schedule_tail, %r2
@@ -833,10 +832,10 @@ ret_from_kernel_thread:
833 bv %r0(%r1) 832 bv %r0(%r1)
834#endif 833#endif
835 ldi 0, %r26 834 ldi 0, %r26
835ENDPROC(ret_from_kernel_thread)
836 836
837 .import sys_execve, code 837 .import sys_execve, code
838 .export __execve, code 838ENTRY(__execve)
839__execve:
840 copy %r2, %r15 839 copy %r2, %r15
841 copy %r30, %r16 840 copy %r30, %r16
842 ldo PT_SZ_ALGN(%r30), %r30 841 ldo PT_SZ_ALGN(%r30), %r30
@@ -856,16 +855,15 @@ __execve:
856 copy %r16, %r30 855 copy %r16, %r30
857 bv %r0(%r2) 856 bv %r0(%r2)
858 nop 857 nop
858ENDPROC(__execve)
859 859
860 .align 4
861 860
862 /* 861 /*
863 * struct task_struct *_switch_to(struct task_struct *prev, 862 * struct task_struct *_switch_to(struct task_struct *prev,
864 * struct task_struct *next) 863 * struct task_struct *next)
865 * 864 *
866 * switch kernel stacks and return prev */ 865 * switch kernel stacks and return prev */
867 .export _switch_to, code 866ENTRY(_switch_to)
868_switch_to:
869 STREG %r2, -RP_OFFSET(%r30) 867 STREG %r2, -RP_OFFSET(%r30)
870 868
871 callee_save_float 869 callee_save_float
@@ -890,6 +888,7 @@ _switch_to_ret:
890 LDREG -RP_OFFSET(%r30), %r2 888 LDREG -RP_OFFSET(%r30), %r2
891 bv %r0(%r2) 889 bv %r0(%r2)
892 copy %r26, %r28 890 copy %r26, %r28
891ENDPROC(_switch_to)
893 892
894 /* 893 /*
895 * Common rfi return path for interruptions, kernel execve, and 894 * Common rfi return path for interruptions, kernel execve, and
@@ -907,8 +906,7 @@ _switch_to_ret:
907 906
908 .align 4096 907 .align 4096
909 908
910 .export syscall_exit_rfi 909ENTRY(syscall_exit_rfi)
911syscall_exit_rfi:
912 mfctl %cr30,%r16 910 mfctl %cr30,%r16
913 LDREG TI_TASK(%r16), %r16 /* thread_info -> task_struct */ 911 LDREG TI_TASK(%r16), %r16 /* thread_info -> task_struct */
914 ldo TASK_REGS(%r16),%r16 912 ldo TASK_REGS(%r16),%r16
@@ -1140,13 +1138,12 @@ intr_extint:
1140 1138
1141 b do_cpu_irq_mask 1139 b do_cpu_irq_mask
1142 ldo R%intr_return(%r2), %r2 /* return to intr_return, not here */ 1140 ldo R%intr_return(%r2), %r2 /* return to intr_return, not here */
1141ENDPROC(syscall_exit_rfi)
1143 1142
1144 1143
1145 /* Generic interruptions (illegal insn, unaligned, page fault, etc) */ 1144 /* Generic interruptions (illegal insn, unaligned, page fault, etc) */
1146 1145
1147 .export intr_save, code /* for os_hpmc */ 1146ENTRY(intr_save) /* for os_hpmc */
1148
1149intr_save:
1150 mfsp %sr7,%r16 1147 mfsp %sr7,%r16
1151 CMPIB=,n 0,%r16,1f 1148 CMPIB=,n 0,%r16,1f
1152 get_stack_use_cr30 1149 get_stack_use_cr30
@@ -1221,6 +1218,7 @@ skip_save_ior:
1221 1218
1222 b handle_interruption 1219 b handle_interruption
1223 ldo R%intr_check_sig(%r2), %r2 1220 ldo R%intr_check_sig(%r2), %r2
1221ENDPROC(intr_save)
1224 1222
1225 1223
1226 /* 1224 /*
@@ -1806,9 +1804,7 @@ dtlb_fault:
1806 LDREG PT_GR18(\regs),%r18 1804 LDREG PT_GR18(\regs),%r18
1807 .endm 1805 .endm
1808 1806
1809 .export sys_fork_wrapper 1807ENTRY(sys_fork_wrapper)
1810 .export child_return
1811sys_fork_wrapper:
1812 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1 1808 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
1813 ldo TASK_REGS(%r1),%r1 1809 ldo TASK_REGS(%r1),%r1
1814 reg_save %r1 1810 reg_save %r1
@@ -1845,9 +1841,10 @@ wrapper_exit:
1845 ldi __NR_fork,%r20 1841 ldi __NR_fork,%r20
1846 bv %r0(%r2) 1842 bv %r0(%r2)
1847 STREG %r20,PT_GR20(%r1) 1843 STREG %r20,PT_GR20(%r1)
1844ENDPROC(sys_fork_wrapper)
1848 1845
1849 /* Set the return value for the child */ 1846 /* Set the return value for the child */
1850child_return: 1847ENTRY(child_return)
1851 BL schedule_tail, %r2 1848 BL schedule_tail, %r2
1852 nop 1849 nop
1853 1850
@@ -1855,10 +1852,10 @@ child_return:
1855 LDREG TASK_PT_GR19(%r1),%r2 1852 LDREG TASK_PT_GR19(%r1),%r2
1856 b wrapper_exit 1853 b wrapper_exit
1857 copy %r0,%r28 1854 copy %r0,%r28
1855ENDPROC(child_return)
1858 1856
1859 1857
1860 .export sys_clone_wrapper 1858ENTRY(sys_clone_wrapper)
1861sys_clone_wrapper:
1862 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 1859 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
1863 ldo TASK_REGS(%r1),%r1 /* get pt regs */ 1860 ldo TASK_REGS(%r1),%r1 /* get pt regs */
1864 reg_save %r1 1861 reg_save %r1
@@ -1879,9 +1876,10 @@ sys_clone_wrapper:
1879 1876
1880 b wrapper_exit 1877 b wrapper_exit
1881 LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2 1878 LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2
1879ENDPROC(sys_clone_wrapper)
1882 1880
1883 .export sys_vfork_wrapper 1881
1884sys_vfork_wrapper: 1882ENTRY(sys_vfork_wrapper)
1885 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 1883 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
1886 ldo TASK_REGS(%r1),%r1 /* get pt regs */ 1884 ldo TASK_REGS(%r1),%r1 /* get pt regs */
1887 reg_save %r1 1885 reg_save %r1
@@ -1902,6 +1900,7 @@ sys_vfork_wrapper:
1902 1900
1903 b wrapper_exit 1901 b wrapper_exit
1904 LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2 1902 LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2
1903ENDPROC(sys_vfork_wrapper)
1905 1904
1906 1905
1907 .macro execve_wrapper execve 1906 .macro execve_wrapper execve
@@ -1938,22 +1937,19 @@ error_\execve:
1938 nop 1937 nop
1939 .endm 1938 .endm
1940 1939
1941 .export sys_execve_wrapper
1942 .import sys_execve 1940 .import sys_execve
1943 1941ENTRY(sys_execve_wrapper)
1944sys_execve_wrapper:
1945 execve_wrapper sys_execve 1942 execve_wrapper sys_execve
1943ENDPROC(sys_execve_wrapper)
1946 1944
1947#ifdef CONFIG_64BIT 1945#ifdef CONFIG_64BIT
1948 .export sys32_execve_wrapper
1949 .import sys32_execve 1946 .import sys32_execve
1950 1947ENTRY(sys32_execve_wrapper)
1951sys32_execve_wrapper:
1952 execve_wrapper sys32_execve 1948 execve_wrapper sys32_execve
1949ENDPROC(sys32_execve_wrapper)
1953#endif 1950#endif
1954 1951
1955 .export sys_rt_sigreturn_wrapper 1952ENTRY(sys_rt_sigreturn_wrapper)
1956sys_rt_sigreturn_wrapper:
1957 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26 1953 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26
1958 ldo TASK_REGS(%r26),%r26 /* get pt regs */ 1954 ldo TASK_REGS(%r26),%r26 /* get pt regs */
1959 /* Don't save regs, we are going to restore them from sigcontext. */ 1955 /* Don't save regs, we are going to restore them from sigcontext. */
@@ -1981,9 +1977,9 @@ sys_rt_sigreturn_wrapper:
1981 */ 1977 */
1982 bv %r0(%r2) 1978 bv %r0(%r2)
1983 LDREG PT_GR28(%r1),%r28 /* reload original r28 for syscall_exit */ 1979 LDREG PT_GR28(%r1),%r28 /* reload original r28 for syscall_exit */
1980ENDPROC(sys_rt_sigreturn_wrapper)
1984 1981
1985 .export sys_sigaltstack_wrapper 1982ENTRY(sys_sigaltstack_wrapper)
1986sys_sigaltstack_wrapper:
1987 /* Get the user stack pointer */ 1983 /* Get the user stack pointer */
1988 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 1984 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
1989 ldo TASK_REGS(%r1),%r24 /* get pt regs */ 1985 ldo TASK_REGS(%r1),%r24 /* get pt regs */
@@ -2002,10 +1998,10 @@ sys_sigaltstack_wrapper:
2002 LDREG -RP_OFFSET(%r30), %r2 1998 LDREG -RP_OFFSET(%r30), %r2
2003 bv %r0(%r2) 1999 bv %r0(%r2)
2004 nop 2000 nop
2001ENDPROC(sys_sigaltstack_wrapper)
2005 2002
2006#ifdef CONFIG_64BIT 2003#ifdef CONFIG_64BIT
2007 .export sys32_sigaltstack_wrapper 2004ENTRY(sys32_sigaltstack_wrapper)
2008sys32_sigaltstack_wrapper:
2009 /* Get the user stack pointer */ 2005 /* Get the user stack pointer */
2010 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r24 2006 LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r24
2011 LDREG TASK_PT_GR30(%r24),%r24 2007 LDREG TASK_PT_GR30(%r24),%r24
@@ -2018,11 +2014,10 @@ sys32_sigaltstack_wrapper:
2018 LDREG -RP_OFFSET(%r30), %r2 2014 LDREG -RP_OFFSET(%r30), %r2
2019 bv %r0(%r2) 2015 bv %r0(%r2)
2020 nop 2016 nop
2017ENDPROC(sys32_sigaltstack_wrapper)
2021#endif 2018#endif
2022 2019
2023 .export syscall_exit 2020ENTRY(syscall_exit)
2024syscall_exit:
2025
2026 /* NOTE: HP-UX syscalls also come through here 2021 /* NOTE: HP-UX syscalls also come through here
2027 * after hpux_syscall_exit fixes up return 2022 * after hpux_syscall_exit fixes up return
2028 * values. */ 2023 * values. */
@@ -2251,7 +2246,10 @@ syscall_do_resched:
2251#endif 2246#endif
2252 b syscall_check_bh /* if resched, we start over again */ 2247 b syscall_check_bh /* if resched, we start over again */
2253 nop 2248 nop
2249ENDPROC(syscall_exit)
2254 2250
2251
2252ENTRY(get_register)
2255 /* 2253 /*
2256 * get_register is used by the non access tlb miss handlers to 2254 * get_register is used by the non access tlb miss handlers to
2257 * copy the value of the general register specified in r8 into 2255 * copy the value of the general register specified in r8 into
@@ -2262,8 +2260,6 @@ syscall_do_resched:
2262 * a -1 in it, but that is OK, it just means that we will have 2260 * a -1 in it, but that is OK, it just means that we will have
2263 * to use the slow path instead). 2261 * to use the slow path instead).
2264 */ 2262 */
2265
2266get_register:
2267 blr %r8,%r0 2263 blr %r8,%r0
2268 nop 2264 nop
2269 bv %r0(%r25) /* r0 */ 2265 bv %r0(%r25) /* r0 */
@@ -2330,14 +2326,15 @@ get_register:
2330 copy %r30,%r1 2326 copy %r30,%r1
2331 bv %r0(%r25) /* r31 */ 2327 bv %r0(%r25) /* r31 */
2332 copy %r31,%r1 2328 copy %r31,%r1
2329ENDPROC(get_register)
2333 2330
2331
2332ENTRY(set_register)
2334 /* 2333 /*
2335 * set_register is used by the non access tlb miss handlers to 2334 * set_register is used by the non access tlb miss handlers to
2336 * copy the value of r1 into the general register specified in 2335 * copy the value of r1 into the general register specified in
2337 * r8. 2336 * r8.
2338 */ 2337 */
2339
2340set_register:
2341 blr %r8,%r0 2338 blr %r8,%r0
2342 nop 2339 nop
2343 bv %r0(%r25) /* r0 (silly, but it is a place holder) */ 2340 bv %r0(%r25) /* r0 (silly, but it is a place holder) */
@@ -2404,3 +2401,5 @@ set_register:
2404 copy %r1,%r30 2401 copy %r1,%r30
2405 bv %r0(%r25) /* r31 */ 2402 bv %r0(%r25) /* r31 */
2406 copy %r1,%r31 2403 copy %r1,%r31
2404ENDPROC(set_register)
2405