83 строки
1.6 KiB
ArmAsm
83 строки
1.6 KiB
ArmAsm
/*
|
|
* relocate_kernel.S for kexec
|
|
* Created by <nschichan@corp.free.fr> on Thu Oct 12 17:49:57 2006
|
|
*
|
|
* This source code is licensed under the GNU General Public License,
|
|
* Version 2. See the file COPYING for more details.
|
|
*/
|
|
|
|
#include <asm/asm.h>
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/regdef.h>
|
|
#include <asm/page.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/stackframe.h>
|
|
#include <asm/addrspace.h>
|
|
|
|
LEAF(relocate_new_kernel)
|
|
PTR_L s0, kexec_indirection_page
|
|
PTR_L s1, kexec_start_address
|
|
|
|
process_entry:
|
|
PTR_L s2, (s0)
|
|
PTR_ADD s0, s0, SZREG
|
|
|
|
/* destination page */
|
|
and s3, s2, 0x1
|
|
beq s3, zero, 1f
|
|
and s4, s2, ~0x1 /* store destination addr in s4 */
|
|
move a0, s4
|
|
b process_entry
|
|
|
|
1:
|
|
/* indirection page, update s0 */
|
|
and s3, s2, 0x2
|
|
beq s3, zero, 1f
|
|
and s0, s2, ~0x2
|
|
b process_entry
|
|
|
|
1:
|
|
/* done page */
|
|
and s3, s2, 0x4
|
|
beq s3, zero, 1f
|
|
b done
|
|
1:
|
|
/* source page */
|
|
and s3, s2, 0x8
|
|
beq s3, zero, process_entry
|
|
and s2, s2, ~0x8
|
|
li s6, (1 << PAGE_SHIFT) / SZREG
|
|
|
|
copy_word:
|
|
/* copy page word by word */
|
|
REG_L s5, (s2)
|
|
REG_S s5, (s4)
|
|
PTR_ADD s4, s4, SZREG
|
|
PTR_ADD s2, s2, SZREG
|
|
LONG_SUB s6, s6, 1
|
|
beq s6, zero, process_entry
|
|
b copy_word
|
|
b process_entry
|
|
|
|
done:
|
|
/* jump to kexec_start_address */
|
|
j s1
|
|
END(relocate_new_kernel)
|
|
|
|
kexec_start_address:
|
|
EXPORT(kexec_start_address)
|
|
PTR 0x0
|
|
.size kexec_start_address, PTRSIZE
|
|
|
|
kexec_indirection_page:
|
|
EXPORT(kexec_indirection_page)
|
|
PTR 0
|
|
.size kexec_indirection_page, PTRSIZE
|
|
|
|
relocate_new_kernel_end:
|
|
|
|
relocate_new_kernel_size:
|
|
EXPORT(relocate_new_kernel_size)
|
|
PTR relocate_new_kernel_end - relocate_new_kernel
|
|
.size relocate_new_kernel_size, PTRSIZE
|