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[S390] Inline assembly cleanup.

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Major cleanup of all s390 inline assemblies. They now have a common
coding style. Quite a few have been shortened, mainly by using register
asm variables. Use of the EX_TABLE macro helps  as well. The atomic ops,
bit ops and locking inlines new use the Q-constraint if a newer gcc
is used.  That results in slightly better code.

Thanks to Christian Borntraeger for proof reading the changes.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2006-09-28 16:56:43 +02:00
父節點 25d83cbfaa
當前提交 94c12cc7d1
共有 51 個文件被更改，包括 1758 次插入 和 2268 次删除
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16
arch/s390/mm/extmem.c
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@@ -142,17 +142,17 @@ dcss_diag (__u8 func, void *parameter,
rx = (unsigned long) parameter;
ry = (unsigned long) func;
__asm__ __volatile__(
asm volatile(
#ifdef CONFIG_64BIT
" sam31\n" // switch to 31 bit
" diag %0,%1,0x64\n"
" sam64\n" // switch back to 64 bit
" sam31\n"
" diag %0,%1,0x64\n"
" sam64\n"
#else
" diag %0,%1,0x64\n"
" diag %0,%1,0x64\n"
#endif
" ipm %2\n"
" srl %2,28\n"
: "+d" (rx), "+d" (ry), "=d" (rc) : : "cc" );
" ipm %2\n"
" srl %2,28\n"
: "+d" (rx), "+d" (ry), "=d" (rc) : : "cc");
*ret1 = rx;
*ret2 = ry;
return rc;

34
arch/s390/mm/fault.c
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@@ -424,20 +424,13 @@ int pfault_init(void)
if (pfault_disable)
return -1;
__asm__ __volatile__(
" diag %1,%0,0x258\n"
"0: j 2f\n"
"1: la %0,8\n"
asm volatile(
" diag %1,%0,0x258\n"
"0: j 2f\n"
"1: la %0,8\n"
"2:\n"
".section __ex_table,\"a\"\n"
" .align 4\n"
#ifndef CONFIG_64BIT
" .long 0b,1b\n"
#else /* CONFIG_64BIT */
" .quad 0b,1b\n"
#endif /* CONFIG_64BIT */
".previous"
: "=d" (rc) : "a" (&refbk), "m" (refbk) : "cc" );
EX_TABLE(0b,1b)
: "=d" (rc) : "a" (&refbk), "m" (refbk) : "cc");
__ctl_set_bit(0, 9);
return rc;
}
@@ -450,18 +443,11 @@ void pfault_fini(void)
if (pfault_disable)
return;
__ctl_clear_bit(0,9);
__asm__ __volatile__(
" diag %0,0,0x258\n"
asm volatile(
" diag %0,0,0x258\n"
"0:\n"
".section __ex_table,\"a\"\n"
" .align 4\n"
#ifndef CONFIG_64BIT
" .long 0b,0b\n"
#else /* CONFIG_64BIT */
" .quad 0b,0b\n"
#endif /* CONFIG_64BIT */
".previous"
: : "a" (&refbk), "m" (refbk) : "cc" );
EX_TABLE(0b,0b)
: : "a" (&refbk), "m" (refbk) : "cc");
}
asmlinkage void

41
arch/s390/mm/init.c
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@@ -45,26 +45,17 @@ void diag10(unsigned long addr)
{
if (addr >= 0x7ff00000)
return;
asm volatile(
#ifdef CONFIG_64BIT
asm volatile (
" sam31\n"
" diag %0,%0,0x10\n"
"0: sam64\n"
".section __ex_table,\"a\"\n"
" .align 8\n"
" .quad 0b, 0b\n"
".previous\n"
: : "a" (addr));
" sam31\n"
" diag %0,%0,0x10\n"
"0: sam64\n"
#else
asm volatile (
" diag %0,%0,0x10\n"
" diag %0,%0,0x10\n"
"0:\n"
".section __ex_table,\"a\"\n"
" .align 4\n"
" .long 0b, 0b\n"
".previous\n"
: : "a" (addr));
#endif
EX_TABLE(0b,0b)
: : "a" (addr));
}
void show_mem(void)
@@ -156,11 +147,10 @@ void __init paging_init(void)
S390_lowcore.kernel_asce = pgdir_k;
/* enable virtual mapping in kernel mode */
__asm__ __volatile__(" LCTL 1,1,%0\n"
" LCTL 7,7,%0\n"
" LCTL 13,13,%0\n"
" SSM %1"
: : "m" (pgdir_k), "m" (ssm_mask));
__ctl_load(pgdir_k, 1, 1);
__ctl_load(pgdir_k, 7, 7);
__ctl_load(pgdir_k, 13, 13);
__raw_local_irq_ssm(ssm_mask);
local_flush_tlb();
return;
@@ -241,11 +231,10 @@ void __init paging_init(void)
S390_lowcore.kernel_asce = pgdir_k;
/* enable virtual mapping in kernel mode */
__asm__ __volatile__("lctlg 1,1,%0\n\t"
"lctlg 7,7,%0\n\t"
"lctlg 13,13,%0\n\t"
"ssm %1"
: :"m" (pgdir_k), "m" (ssm_mask));
__ctl_load(pgdir_k, 1, 1);
__ctl_load(pgdir_k, 7, 7);
__ctl_load(pgdir_k, 13, 13);
__raw_local_irq_ssm(ssm_mask);
local_flush_tlb();