mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 16:12:02 +00:00
2f9060b1db
Fix typos, most reported by "codespell arch/mips". Only touches comments, no code changes. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: linux-mips@vger.kernel.org Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
184 lines
3.5 KiB
ArmAsm
184 lines
3.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* relocate_kernel.S for kexec
|
|
* Created by <nschichan@corp.free.fr> on Thu Oct 12 17:49:57 2006
|
|
*/
|
|
|
|
#include <asm/asm.h>
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/regdef.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/stackframe.h>
|
|
#include <asm/addrspace.h>
|
|
|
|
#include <kernel-entry-init.h>
|
|
|
|
LEAF(relocate_new_kernel)
|
|
PTR_L a0, arg0
|
|
PTR_L a1, arg1
|
|
PTR_L a2, arg2
|
|
PTR_L a3, arg3
|
|
|
|
PTR_L s0, kexec_indirection_page
|
|
PTR_L s1, kexec_start_address
|
|
|
|
process_entry:
|
|
PTR_L s2, (s0)
|
|
PTR_ADDIU s0, s0, SZREG
|
|
|
|
/*
|
|
* In case of a kdump/crash kernel, the indirection page is not
|
|
* populated as the kernel is directly copied to a reserved location
|
|
*/
|
|
beqz s2, done
|
|
|
|
/* destination page */
|
|
and s3, s2, 0x1
|
|
beq s3, zero, 1f
|
|
and s4, s2, ~0x1 /* store destination addr in 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_ADDIU s4, s4, SZREG
|
|
PTR_ADDIU s2, s2, SZREG
|
|
LONG_ADDIU s6, s6, -1
|
|
beq s6, zero, process_entry
|
|
b copy_word
|
|
|
|
done:
|
|
#ifdef CONFIG_SMP
|
|
/* kexec_flag reset is signal to other CPUs what kernel
|
|
was moved to its location. Note - we need relocated address
|
|
of kexec_flag. */
|
|
|
|
bal 1f
|
|
1: move t1,ra;
|
|
PTR_LA t2,1b
|
|
PTR_LA t0,kexec_flag
|
|
PTR_SUB t0,t0,t2;
|
|
PTR_ADD t0,t1,t0;
|
|
LONG_S zero,(t0)
|
|
#endif
|
|
|
|
#ifdef CONFIG_CPU_CAVIUM_OCTEON
|
|
/* We need to flush I-cache before jumping to new kernel.
|
|
* Unfortunately, this code is cpu-specific.
|
|
*/
|
|
.set push
|
|
.set noreorder
|
|
syncw
|
|
syncw
|
|
synci 0($0)
|
|
.set pop
|
|
#else
|
|
sync
|
|
#endif
|
|
/* jump to kexec_start_address */
|
|
j s1
|
|
END(relocate_new_kernel)
|
|
|
|
#ifdef CONFIG_SMP
|
|
/*
|
|
* Other CPUs should wait until code is relocated and
|
|
* then start at entry (?) point.
|
|
*/
|
|
LEAF(kexec_smp_wait)
|
|
PTR_L a0, s_arg0
|
|
PTR_L a1, s_arg1
|
|
PTR_L a2, s_arg2
|
|
PTR_L a3, s_arg3
|
|
PTR_L s1, kexec_start_address
|
|
|
|
/* Non-relocated address works for args and kexec_start_address ( old
|
|
* kernel is not overwritten). But we need relocated address of
|
|
* kexec_flag.
|
|
*/
|
|
|
|
bal 1f
|
|
1: move t1,ra;
|
|
PTR_LA t2,1b
|
|
PTR_LA t0,kexec_flag
|
|
PTR_SUB t0,t0,t2;
|
|
PTR_ADD t0,t1,t0;
|
|
|
|
1: LONG_L s0, (t0)
|
|
bne s0, zero,1b
|
|
|
|
#ifdef USE_KEXEC_SMP_WAIT_FINAL
|
|
kexec_smp_wait_final
|
|
#else
|
|
sync
|
|
#endif
|
|
j s1
|
|
END(kexec_smp_wait)
|
|
#endif
|
|
|
|
#ifdef __mips64
|
|
/* all PTR's must be aligned to 8 byte in 64-bit mode */
|
|
.align 3
|
|
#endif
|
|
|
|
/* All parameters to new kernel are passed in registers a0-a3.
|
|
* kexec_args[0..3] are used to prepare register values.
|
|
*/
|
|
|
|
EXPORT(kexec_args)
|
|
arg0: PTR_WD 0x0
|
|
arg1: PTR_WD 0x0
|
|
arg2: PTR_WD 0x0
|
|
arg3: PTR_WD 0x0
|
|
.size kexec_args,PTRSIZE*4
|
|
|
|
#ifdef CONFIG_SMP
|
|
/*
|
|
* Secondary CPUs may have different kernel parameters in
|
|
* their registers a0-a3. secondary_kexec_args[0..3] are used
|
|
* to prepare register values.
|
|
*/
|
|
EXPORT(secondary_kexec_args)
|
|
s_arg0: PTR_WD 0x0
|
|
s_arg1: PTR_WD 0x0
|
|
s_arg2: PTR_WD 0x0
|
|
s_arg3: PTR_WD 0x0
|
|
.size secondary_kexec_args,PTRSIZE*4
|
|
kexec_flag:
|
|
LONG 0x1
|
|
|
|
#endif
|
|
|
|
EXPORT(kexec_start_address)
|
|
PTR_WD 0x0
|
|
.size kexec_start_address, PTRSIZE
|
|
|
|
EXPORT(kexec_indirection_page)
|
|
PTR_WD 0
|
|
.size kexec_indirection_page, PTRSIZE
|
|
|
|
relocate_new_kernel_end:
|
|
|
|
EXPORT(relocate_new_kernel_size)
|
|
PTR_WD relocate_new_kernel_end - relocate_new_kernel
|
|
.size relocate_new_kernel_size, PTRSIZE
|