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-rw-r--r--arch/mips/kernel/Makefile2
-rw-r--r--arch/mips/kernel/machine_kexec.c85
-rw-r--r--arch/mips/kernel/relocate_kernel.S80
-rw-r--r--arch/mips/kernel/scall32-o32.S2
-rw-r--r--arch/mips/kernel/scall64-64.S2
-rw-r--r--arch/mips/kernel/scall64-n32.S2
-rw-r--r--arch/mips/kernel/scall64-o32.S2
7 files changed, 171 insertions, 4 deletions
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 6bfbbed0897e..f35b739d0a12 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -67,6 +67,8 @@ obj-$(CONFIG_64BIT) += cpu-bugs64.o
67 67
68obj-$(CONFIG_I8253) += i8253.o 68obj-$(CONFIG_I8253) += i8253.o
69 69
70obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
71
70CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi) 72CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
71 73
72EXTRA_AFLAGS := $(CFLAGS) 74EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/kernel/machine_kexec.c b/arch/mips/kernel/machine_kexec.c
new file mode 100644
index 000000000000..e0ad754c7edd
--- /dev/null
+++ b/arch/mips/kernel/machine_kexec.c
@@ -0,0 +1,85 @@
1/*
2 * machine_kexec.c for kexec
3 * Created by <nschichan@corp.free.fr> on Thu Oct 12 15:15:06 2006
4 *
5 * This source code is licensed under the GNU General Public License,
6 * Version 2. See the file COPYING for more details.
7 */
8
9#include <linux/kexec.h>
10#include <linux/mm.h>
11#include <linux/delay.h>
12
13#include <asm/cacheflush.h>
14#include <asm/page.h>
15
16const extern unsigned char relocate_new_kernel[];
17const extern unsigned int relocate_new_kernel_size;
18
19extern unsigned long kexec_start_address;
20extern unsigned long kexec_indirection_page;
21
22int
23machine_kexec_prepare(struct kimage *kimage)
24{
25 return 0;
26}
27
28void
29machine_kexec_cleanup(struct kimage *kimage)
30{
31}
32
33void
34machine_shutdown(void)
35{
36}
37
38void
39machine_crash_shutdown(struct pt_regs *regs)
40{
41}
42
43void
44machine_kexec(struct kimage *image)
45{
46 unsigned long reboot_code_buffer;
47 unsigned long entry;
48 unsigned long *ptr;
49
50 reboot_code_buffer =
51 (unsigned long)page_address(image->control_code_page);
52
53 kexec_start_address = image->start;
54 kexec_indirection_page = phys_to_virt(image->head & PAGE_MASK);
55
56 memcpy((void*)reboot_code_buffer, relocate_new_kernel,
57 relocate_new_kernel_size);
58
59 /*
60 * The generic kexec code builds a page list with physical
61 * addresses. they are directly accessible through KSEG0 (or
62 * CKSEG0 or XPHYS if on 64bit system), hence the
63 * pys_to_virt() call.
64 */
65 for (ptr = &image->head; (entry = *ptr) && !(entry &IND_DONE);
66 ptr = (entry & IND_INDIRECTION) ?
67 phys_to_virt(entry & PAGE_MASK) : ptr + 1) {
68 if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION ||
69 *ptr & IND_DESTINATION)
70 *ptr = phys_to_virt(*ptr);
71 }
72
73 /*
74 * we do not want to be bothered.
75 */
76 local_irq_disable();
77
78 flush_icache_range(reboot_code_buffer,
79 reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
80
81 printk("Will call new kernel at %08x\n", image->start);
82 printk("Bye ...\n");
83 flush_cache_all();
84 ((void (*)(void))reboot_code_buffer)();
85}
diff --git a/arch/mips/kernel/relocate_kernel.S b/arch/mips/kernel/relocate_kernel.S
new file mode 100644
index 000000000000..a3f0d00c1334
--- /dev/null
+++ b/arch/mips/kernel/relocate_kernel.S
@@ -0,0 +1,80 @@
1/*
2 * relocate_kernel.S for kexec
3 * Created by <nschichan@corp.free.fr> on Thu Oct 12 17:49:57 2006
4 *
5 * This source code is licensed under the GNU General Public License,
6 * Version 2. See the file COPYING for more details.
7 */
8
9#include <asm/asm.h>
10#include <asm/asmmacro.h>
11#include <asm/regdef.h>
12#include <asm/page.h>
13#include <asm/mipsregs.h>
14#include <asm/stackframe.h>
15#include <asm/addrspace.h>
16
17 .globl relocate_new_kernel
18relocate_new_kernel:
19
20 PTR_L s0, kexec_indirection_page
21 PTR_L s1, kexec_start_address
22
23process_entry:
24 PTR_L s2, (s0)
25 PTR_ADD s0, s0, SZREG
26
27 /* destination page */
28 and s3, s2, 0x1
29 beq s3, zero, 1f
30 and s4, s2, ~0x1 /* store destination addr in s4 */
31 move a0, s4
32 b process_entry
33
341:
35 /* indirection page, update s0 */
36 and s3, s2, 0x2
37 beq s3, zero, 1f
38 and s0, s2, ~0x2
39 b process_entry
40
411:
42 /* done page */
43 and s3, s2, 0x4
44 beq s3, zero, 1f
45 b done
461:
47 /* source page */
48 and s3, s2, 0x8
49 beq s3, zero, process_entry
50 and s2, s2, ~0x8
51 li s6, (1 << PAGE_SHIFT) / SZREG
52
53copy_word:
54 /* copy page word by word */
55 REG_L s5, (s2)
56 REG_S s5, (s4)
57 INT_ADD s4, s4, SZREG
58 INT_ADD s2, s2, SZREG
59 INT_SUB s6, s6, 1
60 beq s6, zero, process_entry
61 b copy_word
62 b process_entry
63
64done:
65 /* jump to kexec_start_address */
66 j s1
67
68 .globl kexec_start_address
69kexec_start_address:
70 .long 0x0
71
72 .globl kexec_indirection_page
73kexec_indirection_page:
74 .long 0x0
75
76relocate_new_kernel_end:
77
78 .globl relocate_new_kernel_size
79relocate_new_kernel_size:
80 .long relocate_new_kernel_end - relocate_new_kernel
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index a95f37de080e..7c0b3936ba44 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -653,7 +653,7 @@ einval: li v0, -EINVAL
653 sys sys_move_pages 6 653 sys sys_move_pages 6
654 sys sys_set_robust_list 2 654 sys sys_set_robust_list 2
655 sys sys_get_robust_list 3 /* 4310 */ 655 sys sys_get_robust_list 3 /* 4310 */
656 sys sys_ni_syscall 0 656 sys sys_kexec_load 4
657 sys sys_getcpu 3 657 sys sys_getcpu 3
658 sys sys_epoll_pwait 6 658 sys sys_epoll_pwait 6
659 .endm 659 .endm
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 8fb0f60f657b..e569b846e9a3 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -468,6 +468,6 @@ sys_call_table:
468 PTR sys_move_pages 468 PTR sys_move_pages
469 PTR sys_set_robust_list 469 PTR sys_set_robust_list
470 PTR sys_get_robust_list 470 PTR sys_get_robust_list
471 PTR sys_ni_syscall /* 5270 */ 471 PTR sys_kexec_load /* 5270 */
472 PTR sys_getcpu 472 PTR sys_getcpu
473 PTR sys_epoll_pwait 473 PTR sys_epoll_pwait
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 0da5ca2040ff..5b18f265d75b 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -394,6 +394,6 @@ EXPORT(sysn32_call_table)
394 PTR sys_move_pages 394 PTR sys_move_pages
395 PTR compat_sys_set_robust_list 395 PTR compat_sys_set_robust_list
396 PTR compat_sys_get_robust_list 396 PTR compat_sys_get_robust_list
397 PTR sys_ni_syscall 397 PTR compat_sys_kexec_load
398 PTR sys_getcpu 398 PTR sys_getcpu
399 PTR sys_epoll_pwait 399 PTR sys_epoll_pwait
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index b9d00cae8b5f..e91379c1be1d 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -516,7 +516,7 @@ sys_call_table:
516 PTR compat_sys_move_pages 516 PTR compat_sys_move_pages
517 PTR compat_sys_set_robust_list 517 PTR compat_sys_set_robust_list
518 PTR compat_sys_get_robust_list /* 4310 */ 518 PTR compat_sys_get_robust_list /* 4310 */
519 PTR sys_ni_syscall 519 PTR compat_sys_kexec_load
520 PTR sys_getcpu 520 PTR sys_getcpu
521 PTR sys_epoll_pwait 521 PTR sys_epoll_pwait
522 .size sys_call_table,.-sys_call_table 522 .size sys_call_table,.-sys_call_table
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-15 13:30:42 -0500