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[MIPS] Kexec: Fix several 64-bit bugs.
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle committed Jul 31, 2007
1 parent 1065932 commit 00be0f3
Showing 1 changed file with 40 additions and 38 deletions.
78 changes: 40 additions & 38 deletions arch/mips/kernel/relocate_kernel.S
Original file line number Diff line number Diff line change
Expand Up @@ -14,67 +14,69 @@
#include <asm/stackframe.h>
#include <asm/addrspace.h>

.globl relocate_new_kernel
relocate_new_kernel:

PTR_L s0, kexec_indirection_page
PTR_L s1, kexec_start_address
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
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
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
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
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
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)
INT_ADD s4, s4, SZREG
INT_ADD s2, s2, SZREG
INT_SUB s6, s6, 1
beq s6, zero, process_entry
b copy_word
b process_entry
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
j s1
END(relocate_new_kernel)

.globl kexec_start_address
kexec_start_address:
.long 0x0
EXPORT(kexec_start_address)
PTR 0x0
.size kexec_start_address, PTRSIZE

.globl kexec_indirection_page
kexec_indirection_page:
.long 0x0
EXPORT(kexec_indirection_page)
PTR 0
.size kexec_indirection_page, PTRSIZE

relocate_new_kernel_end:

.globl relocate_new_kernel_size
relocate_new_kernel_size:
.long relocate_new_kernel_end - relocate_new_kernel
EXPORT(relocate_new_kernel_size)
PTR relocate_new_kernel_end - relocate_new_kernel
.size relocate_new_kernel_size, PTRSIZE

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