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| author | Ralf Baechle <ralf@linux-mips.org> | 2009-09-17 04:25:05 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-09-17 22:07:49 +0400 |
| commit | f1e39a4a616cd9981a9decfd5332fd07a01abb8b (patch) | |
| tree | 555e0c78611bb30cef2caca1ae1b5043a9999290 /arch/mips/kernel/scall64-64.S | |
| parent | f4c6b6bc5a4fc8d607f2d89369008c85a3a12a8b (diff) | |
| download | linux-f1e39a4a616cd9981a9decfd5332fd07a01abb8b.tar.xz | |
MIPS: Rewrite sysmips(MIPS_ATOMIC_SET, ...) in C with inline assembler
This way it doesn't have to use CONFIG_CPU_HAS_LLSC anymore.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/scall64-64.S')
| -rw-r--r-- | arch/mips/kernel/scall64-64.S | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S index 3d866f24e064..b97b993846d6 100644 --- a/arch/mips/kernel/scall64-64.S +++ b/arch/mips/kernel/scall64-64.S @@ -124,78 +124,6 @@ illegal_syscall: j n64_syscall_exit END(handle_sys64) - LEAF(mips_atomic_set) - andi v0, a1, 3 # must be word aligned - bnez v0, bad_alignment - - LONG_L v1, TI_ADDR_LIMIT($28) # in legal address range? - LONG_ADDIU a0, a1, 4 - or a0, a0, a1 - and a0, a0, v1 - bltz a0, bad_address - -#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) -#if R10000_LLSC_WAR - beqzl a0, 1b -#else - beqz a0, 1b -#endif - - .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 - - sd zero, PT_R7(sp) # success - sd v0, PT_R2(sp) # result - - j n64_syscall_exit # continue like a normal syscall - -no_mem: li v0, -ENOMEM - jr ra - -bad_address: - li v0, -EFAULT - jr ra - -bad_alignment: - li v0, -EINVAL - jr ra - END(mips_atomic_set) - - LEAF(sys_sysmips) - beq a0, MIPS_ATOMIC_SET, mips_atomic_set - j _sys_sysmips - END(sys_sysmips) - .align 3 sys_call_table: PTR sys_read /* 5000 */ |