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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-06-04 14:54:14 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-06-25 00:07:10 +1000 |
| commit | 4bd9e05ac7b8b1f7d0c28702cb684417501a5e39 (patch) | |
| tree | 0c0722fa29cbde6ea0c6361e1ed54ac5e56ac47a /arch/powerpc/kernel/entry_32.S | |
| parent | powerpc/32: Interchange r1 and r11 in SYSCALL_ENTRY on booke (diff) | |
| download | linux-dev-4bd9e05ac7b8b1f7d0c28702cb684417501a5e39.tar.xz linux-dev-4bd9e05ac7b8b1f7d0c28702cb684417501a5e39.zip | |
powerpc/32: Reduce code duplication of system call entry
booke and non booke do pretty similar things in SYSCALL_ENTRY macro
just before calling jumping to transfer_to_syscall().
Do them in transfer_to_syscall() instead.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/552e27fa09394a6bc70585fcdfa237f99a5d1267.1622818435.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 6c09ebb853ec..0273a1349006 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -32,6 +32,7 @@ #include <asm/barrier.h> #include <asm/kup.h> #include <asm/bug.h> +#include <asm/interrupt.h> #include "head_32.h" @@ -74,6 +75,24 @@ _ASM_NOKPROBE_SYMBOL(prepare_transfer_to_handler) .globl transfer_to_syscall transfer_to_syscall: + stw r11, GPR1(r1) + stw r11, 0(r1) + mflr r12 + stw r12, _LINK(r1) +#if defined(CONFIG_BOOKE) || defined(CONFIG_40x) + rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */ +#endif + lis r12,STACK_FRAME_REGS_MARKER@ha /* exception frame marker */ + SAVE_GPR(2, r1) + addi r12,r12,STACK_FRAME_REGS_MARKER@l + stw r9,_MSR(r1) + li r2, INTERRUPT_SYSCALL + stw r12,8(r1) + stw r2,_TRAP(r1) + SAVE_GPR(0, r1) + SAVE_4GPRS(3, r1) + SAVE_2GPRS(7, r1) + addi r2,r10,-THREAD SAVE_NVGPRS(r1) /* Calling convention has r9 = orig r0, r10 = regs */ |