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parisc: move virt_map macro to assembly.h 

This macro will also be used by the TOC code, so move it
into asm/assembly.h to avoid duplication.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Sven Schnelle 2021-10-14 21:49:13 +02:00 committed by Helge Deller
parent 8e0ba125c2
commit b5f73da500
2 changed files with 25 additions and 24 deletions
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25
arch/parisc/include/asm/assembly.h
View File

@ -78,6 +78,7 @@
#include <asm/types.h>
#include <asm/asmregs.h>
#include <asm/psw.h>
sp = 30
gp = 27
@ -504,6 +505,30 @@
nop /* 7 */
.endm
/* Switch to virtual mapping, trashing only %r1 */
.macro virt_map
/* pcxt_ssm_bug */
rsm PSW_SM_I, %r0 /* barrier for "Relied upon Translation */
mtsp %r0, %sr4
mtsp %r0, %sr5
mtsp %r0, %sr6
tovirt_r1 %r29
load32 KERNEL_PSW, %r1
rsm PSW_SM_QUIET,%r0 /* second "heavy weight" ctl op */
mtctl %r0, %cr17 /* Clear IIASQ tail */
mtctl %r0, %cr17 /* Clear IIASQ head */
mtctl %r1, %ipsw
load32 4f, %r1
mtctl %r1, %cr18 /* Set IIAOQ tail */
ldo 4(%r1), %r1
mtctl %r1, %cr18 /* Set IIAOQ head */
rfir
nop
4:
.endm
/*
* ASM_EXCEPTIONTABLE_ENTRY
*

24
arch/parisc/kernel/entry.S
View File

@ -51,30 +51,6 @@
extrd,u \spc,(64 - (SPACEID_SHIFT)),32,\prot
.endm
#endif
/* Switch to virtual mapping, trashing only %r1 */
.macro virt_map
/* pcxt_ssm_bug */
rsm PSW_SM_I, %r0 /* barrier for "Relied upon Translation */
mtsp %r0, %sr4
mtsp %r0, %sr5
mtsp %r0, %sr6
tovirt_r1 %r29
load32 KERNEL_PSW, %r1
rsm PSW_SM_QUIET,%r0 /* second "heavy weight" ctl op */
mtctl %r0, %cr17 /* Clear IIASQ tail */
mtctl %r0, %cr17 /* Clear IIASQ head */
mtctl %r1, %ipsw
load32 4f, %r1
mtctl %r1, %cr18 /* Set IIAOQ tail */
ldo 4(%r1), %r1
mtctl %r1, %cr18 /* Set IIAOQ head */
rfir
nop
4:
.endm
/*
* The "get_stack" macros are responsible for determining the
* kernel stack value.