kevin/linux
1
Fork 0
Code
072e1ae73c
linux/arch/ia64/kernel/relocate_kernel.S
Tejun Heo 877105cc49 percpu: make percpu symbols in ia64 unique 
This patch updates percpu related symbols in ia64 such that percpu
symbols are unique and don't clash with local symbols.  This serves
two purposes of decreasing the possibility of global percpu symbol
collision and allowing dropping per_cpu__ prefix from percpu symbols.

* arch/ia64/kernel/setup.c: s/cpu_info/ia64_cpu_info/

Partly based on Rusty Russell's "alloc_percpu: rename percpu vars
which cause name clashes" patch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
2009-10-29 22:34:14 +09:00

326 lines
7.5 KiB
ArmAsm
Raw Blame History

/*
* arch/ia64/kernel/relocate_kernel.S
*
* Relocate kexec'able kernel and start it
*
* Copyright (C) 2005 Hewlett-Packard Development Company, L.P.
* Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com>
* Copyright (C) 2005 Intel Corp, Zou Nan hai <nanhai.zou@intel.com>
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#include <asm/asmmacro.h>
#include <asm/kregs.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/mca_asm.h>
/* Must be relocatable PIC code callable as a C function
*/
GLOBAL_ENTRY(relocate_new_kernel)
.prologue
alloc r31=ar.pfs,4,0,0,0
.body
.reloc_entry:
{
rsm psr.i| psr.ic
mov r2=ip
}
;;
{
flushrs // must be first insn in group
srlz.i
}
;;
dep r2=0,r2,61,3 //to physical address
;;
//first switch to physical mode
add r3=1f-.reloc_entry, r2
movl r16 = IA64_PSR_AC|IA64_PSR_BN|IA64_PSR_IC
mov ar.rsc=0 // put RSE in enforced lazy mode
;;
add sp=(memory_stack_end - 16 - .reloc_entry),r2
add r8=(register_stack - .reloc_entry),r2
;;
mov r18=ar.rnat
mov ar.bspstore=r8
;;
mov cr.ipsr=r16
mov cr.iip=r3
mov cr.ifs=r0
srlz.i
;;
mov ar.rnat=r18
rfi // note: this unmask MCA/INIT (psr.mc)
;;
1:
//physical mode code begin
mov b6=in1
dep r28=0,in2,61,3 //to physical address
// purge all TC entries
#define O(member) IA64_CPUINFO_##member##_OFFSET
GET_THIS_PADDR(r2, ia64_cpu_info) // load phys addr of cpu_info into r2
;;
addl r17=O(PTCE_STRIDE),r2
addl r2=O(PTCE_BASE),r2
;;
ld8 r18=[r2],(O(PTCE_COUNT)-O(PTCE_BASE));; // r18=ptce_base
ld4 r19=[r2],4 // r19=ptce_count[0]
ld4 r21=[r17],4 // r21=ptce_stride[0]
;;
ld4 r20=[r2] // r20=ptce_count[1]
ld4 r22=[r17] // r22=ptce_stride[1]
mov r24=r0
;;
adds r20=-1,r20
;;
#undef O
2:
cmp.ltu p6,p7=r24,r19
(p7) br.cond.dpnt.few 4f
mov ar.lc=r20
3:
ptc.e r18
;;
add r18=r22,r18
br.cloop.sptk.few 3b
;;
add r18=r21,r18
add r24=1,r24
;;
br.sptk.few 2b
4:
srlz.i
;;
// purge TR entry for kernel text and data
movl r16=KERNEL_START
mov r18=KERNEL_TR_PAGE_SHIFT<<2
;;
ptr.i r16, r18
ptr.d r16, r18
;;
srlz.i
;;
// purge TR entry for pal code
mov r16=in3
mov r18=IA64_GRANULE_SHIFT<<2
;;
ptr.i r16,r18
;;
srlz.i
;;
// purge TR entry for stack
mov r16=IA64_KR(CURRENT_STACK)
;;
shl r16=r16,IA64_GRANULE_SHIFT
movl r19=PAGE_OFFSET
;;
add r16=r19,r16
mov r18=IA64_GRANULE_SHIFT<<2
;;
ptr.d r16,r18
;;
srlz.i
;;
//copy segments
movl r16=PAGE_MASK
mov r30=in0 // in0 is page_list
br.sptk.few .dest_page
;;
.loop:
ld8 r30=[in0], 8;;
.dest_page:
tbit.z p0, p6=r30, 0;; // 0x1 dest page
(p6) and r17=r30, r16
(p6) br.cond.sptk.few .loop;;
tbit.z p0, p6=r30, 1;; // 0x2 indirect page
(p6) and in0=r30, r16
(p6) br.cond.sptk.few .loop;;
tbit.z p0, p6=r30, 2;; // 0x4 end flag
(p6) br.cond.sptk.few .end_loop;;
tbit.z p6, p0=r30, 3;; // 0x8 source page
(p6) br.cond.sptk.few .loop
and r18=r30, r16
// simple copy page, may optimize later
movl r14=PAGE_SIZE/8 - 1;;
mov ar.lc=r14;;
1:
ld8 r14=[r18], 8;;
st8 [r17]=r14;;
fc.i r17
add r17=8, r17
br.ctop.sptk.few 1b
br.sptk.few .loop
;;
.end_loop:
sync.i // for fc.i
;;
srlz.i
;;
srlz.d
;;
br.call.sptk.many b0=b6;;
.align 32
memory_stack:
.fill 8192, 1, 0
memory_stack_end:
register_stack:
.fill 8192, 1, 0
register_stack_end:
relocate_new_kernel_end:
END(relocate_new_kernel)
.global relocate_new_kernel_size
relocate_new_kernel_size:
data8 relocate_new_kernel_end - relocate_new_kernel
GLOBAL_ENTRY(ia64_dump_cpu_regs)
.prologue
alloc loc0=ar.pfs,1,2,0,0
.body
mov ar.rsc=0 // put RSE in enforced lazy mode
add loc1=4*8, in0 // save r4 and r5 first
;;
{
flushrs // flush dirty regs to backing store
srlz.i
}
st8 [loc1]=r4, 8
;;
st8 [loc1]=r5, 8
;;
add loc1=32*8, in0
mov r4=ar.rnat
;;
st8 [in0]=r0, 8 // r0
st8 [loc1]=r4, 8 // rnat
mov r5=pr
;;
st8 [in0]=r1, 8 // r1
st8 [loc1]=r5, 8 // pr
mov r4=b0
;;
st8 [in0]=r2, 8 // r2
st8 [loc1]=r4, 8 // b0
mov r5=b1;
;;
st8 [in0]=r3, 24 // r3
st8 [loc1]=r5, 8 // b1
mov r4=b2
;;
st8 [in0]=r6, 8 // r6
st8 [loc1]=r4, 8 // b2
mov r5=b3
;;
st8 [in0]=r7, 8 // r7
st8 [loc1]=r5, 8 // b3
mov r4=b4
;;
st8 [in0]=r8, 8 // r8
st8 [loc1]=r4, 8 // b4
mov r5=b5
;;
st8 [in0]=r9, 8 // r9
st8 [loc1]=r5, 8 // b5
mov r4=b6
;;
st8 [in0]=r10, 8 // r10
st8 [loc1]=r5, 8 // b6
mov r5=b7
;;
st8 [in0]=r11, 8 // r11
st8 [loc1]=r5, 8 // b7
mov r4=b0
;;
st8 [in0]=r12, 8 // r12
st8 [loc1]=r4, 8 // ip
mov r5=loc0
;;
st8 [in0]=r13, 8 // r13
extr.u r5=r5, 0, 38 // ar.pfs.pfm
mov r4=r0 // user mask
;;
st8 [in0]=r14, 8 // r14
st8 [loc1]=r5, 8 // cfm
;;
st8 [in0]=r15, 8 // r15
st8 [loc1]=r4, 8 // user mask
mov r5=ar.rsc
;;
st8 [in0]=r16, 8 // r16
st8 [loc1]=r5, 8 // ar.rsc
mov r4=ar.bsp
;;
st8 [in0]=r17, 8 // r17
st8 [loc1]=r4, 8 // ar.bsp
mov r5=ar.bspstore
;;
st8 [in0]=r18, 8 // r18
st8 [loc1]=r5, 8 // ar.bspstore
mov r4=ar.rnat
;;
st8 [in0]=r19, 8 // r19
st8 [loc1]=r4, 8 // ar.rnat
mov r5=ar.ccv
;;
st8 [in0]=r20, 8 // r20
st8 [loc1]=r5, 8 // ar.ccv
mov r4=ar.unat
;;
st8 [in0]=r21, 8 // r21
st8 [loc1]=r4, 8 // ar.unat
mov r5 = ar.fpsr
;;
st8 [in0]=r22, 8 // r22
st8 [loc1]=r5, 8 // ar.fpsr
mov r4 = ar.unat
;;
st8 [in0]=r23, 8 // r23
st8 [loc1]=r4, 8 // unat
mov r5 = ar.fpsr
;;
st8 [in0]=r24, 8 // r24
st8 [loc1]=r5, 8 // fpsr
mov r4 = ar.pfs
;;
st8 [in0]=r25, 8 // r25
st8 [loc1]=r4, 8 // ar.pfs
mov r5 = ar.lc
;;
st8 [in0]=r26, 8 // r26
st8 [loc1]=r5, 8 // ar.lc
mov r4 = ar.ec
;;
st8 [in0]=r27, 8 // r27
st8 [loc1]=r4, 8 // ar.ec
mov r5 = ar.csd
;;
st8 [in0]=r28, 8 // r28
st8 [loc1]=r5, 8 // ar.csd
mov r4 = ar.ssd
;;
st8 [in0]=r29, 8 // r29
st8 [loc1]=r4, 8 // ar.ssd
;;
st8 [in0]=r30, 8 // r30
;;
st8 [in0]=r31, 8 // r31
mov ar.pfs=loc0
;;
br.ret.sptk.many rp
END(ia64_dump_cpu_regs)
View Git Blame Copy Permalink