mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 13:05:08 +07:00
91274f962e
The tst menomic has only a single #<const> argument in Thumb mode. There
is an ARM variant which allows to write #<const> as #<byte>, #<rot>
which probably is where the current syntax comes from.
It seems that binutils does not care about the additional parameter.
Clang however complains in Thumb2 mode:
arch/arm/kernel/relocate_kernel.S:28:12: error: too many operands for
instruction
tst r3,#1,0
^
Drop the unnecessary parameter. This fixes building this file in Thumb2
mode with the Clang integrated assembler.
Link: https://github.com/ClangBuiltLinux/linux/issues/770
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
95 lines
1.5 KiB
ArmAsm
95 lines
1.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* relocate_kernel.S - put the kernel image in place to boot
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
#include <asm/kexec.h>
|
|
|
|
.align 3 /* not needed for this code, but keeps fncpy() happy */
|
|
|
|
ENTRY(relocate_new_kernel)
|
|
|
|
ldr r0,kexec_indirection_page
|
|
ldr r1,kexec_start_address
|
|
|
|
/*
|
|
* If there is no indirection page (we are doing crashdumps)
|
|
* skip any relocation.
|
|
*/
|
|
cmp r0, #0
|
|
beq 2f
|
|
|
|
0: /* top, read another word for the indirection page */
|
|
ldr r3, [r0],#4
|
|
|
|
/* Is it a destination page. Put destination address to r4 */
|
|
tst r3,#1
|
|
beq 1f
|
|
bic r4,r3,#1
|
|
b 0b
|
|
1:
|
|
/* Is it an indirection page */
|
|
tst r3,#2
|
|
beq 1f
|
|
bic r0,r3,#2
|
|
b 0b
|
|
1:
|
|
|
|
/* are we done ? */
|
|
tst r3,#4
|
|
beq 1f
|
|
b 2f
|
|
|
|
1:
|
|
/* is it source ? */
|
|
tst r3,#8
|
|
beq 0b
|
|
bic r3,r3,#8
|
|
mov r6,#1024
|
|
9:
|
|
ldr r5,[r3],#4
|
|
str r5,[r4],#4
|
|
subs r6,r6,#1
|
|
bne 9b
|
|
b 0b
|
|
|
|
2:
|
|
/* Jump to relocated kernel */
|
|
mov lr,r1
|
|
mov r0,#0
|
|
ldr r1,kexec_mach_type
|
|
ldr r2,kexec_boot_atags
|
|
ARM( ret lr )
|
|
THUMB( bx lr )
|
|
|
|
.align
|
|
|
|
.globl kexec_start_address
|
|
kexec_start_address:
|
|
.long 0x0
|
|
|
|
.globl kexec_indirection_page
|
|
kexec_indirection_page:
|
|
.long 0x0
|
|
|
|
.globl kexec_mach_type
|
|
kexec_mach_type:
|
|
.long 0x0
|
|
|
|
/* phy addr of the atags for the new kernel */
|
|
.globl kexec_boot_atags
|
|
kexec_boot_atags:
|
|
.long 0x0
|
|
|
|
ENDPROC(relocate_new_kernel)
|
|
|
|
relocate_new_kernel_end:
|
|
|
|
.globl relocate_new_kernel_size
|
|
relocate_new_kernel_size:
|
|
.long relocate_new_kernel_end - relocate_new_kernel
|
|
|
|
|