aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/kexec.h31
-rw-r--r--arch/x86/include/asm/reboot.h5
-rw-r--r--arch/x86/kernel/crash.c67
-rw-r--r--arch/x86/kernel/machine_kexec_32.c104
-rw-r--r--arch/x86/kernel/reboot.c92
-rw-r--r--arch/x86/kernel/relocate_kernel_32.S115
6 files changed, 203 insertions, 211 deletions
diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
index a1f22771a15a..c61d8b2ab8b9 100644
--- a/arch/x86/include/asm/kexec.h
+++ b/arch/x86/include/asm/kexec.h
@@ -5,21 +5,8 @@
5# define PA_CONTROL_PAGE 0 5# define PA_CONTROL_PAGE 0
6# define VA_CONTROL_PAGE 1 6# define VA_CONTROL_PAGE 1
7# define PA_PGD 2 7# define PA_PGD 2
8# define VA_PGD 3 8# define PA_SWAP_PAGE 3
9# define PA_PTE_0 4 9# define PAGES_NR 4
10# define VA_PTE_0 5
11# define PA_PTE_1 6
12# define VA_PTE_1 7
13# define PA_SWAP_PAGE 8
14# ifdef CONFIG_X86_PAE
15# define PA_PMD_0 9
16# define VA_PMD_0 10
17# define PA_PMD_1 11
18# define VA_PMD_1 12
19# define PAGES_NR 13
20# else
21# define PAGES_NR 9
22# endif
23#else 10#else
24# define PA_CONTROL_PAGE 0 11# define PA_CONTROL_PAGE 0
25# define VA_CONTROL_PAGE 1 12# define VA_CONTROL_PAGE 1
@@ -170,6 +157,20 @@ relocate_kernel(unsigned long indirection_page,
170 unsigned long start_address) ATTRIB_NORET; 157 unsigned long start_address) ATTRIB_NORET;
171#endif 158#endif
172 159
160#ifdef CONFIG_X86_32
161#define ARCH_HAS_KIMAGE_ARCH
162
163struct kimage_arch {
164 pgd_t *pgd;
165#ifdef CONFIG_X86_PAE
166 pmd_t *pmd0;
167 pmd_t *pmd1;
168#endif
169 pte_t *pte0;
170 pte_t *pte1;
171};
172#endif
173
173#endif /* __ASSEMBLY__ */ 174#endif /* __ASSEMBLY__ */
174 175
175#endif /* _ASM_X86_KEXEC_H */ 176#endif /* _ASM_X86_KEXEC_H */
diff --git a/arch/x86/include/asm/reboot.h b/arch/x86/include/asm/reboot.h
index df7710354f85..562d4fd31ba8 100644
--- a/arch/x86/include/asm/reboot.h
+++ b/arch/x86/include/asm/reboot.h
@@ -1,6 +1,8 @@
1#ifndef _ASM_X86_REBOOT_H 1#ifndef _ASM_X86_REBOOT_H
2#define _ASM_X86_REBOOT_H 2#define _ASM_X86_REBOOT_H
3 3
4#include <linux/kdebug.h>
5
4struct pt_regs; 6struct pt_regs;
5 7
6struct machine_ops { 8struct machine_ops {
@@ -18,4 +20,7 @@ void native_machine_crash_shutdown(struct pt_regs *regs);
18void native_machine_shutdown(void); 20void native_machine_shutdown(void);
19void machine_real_restart(const unsigned char *code, int length); 21void machine_real_restart(const unsigned char *code, int length);
20 22
23typedef void (*nmi_shootdown_cb)(int, struct die_args*);
24void nmi_shootdown_cpus(nmi_shootdown_cb callback);
25
21#endif /* _ASM_X86_REBOOT_H */ 26#endif /* _ASM_X86_REBOOT_H */
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 81e01f7b1d12..d84a852e4cd7 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -29,34 +29,17 @@
29 29
30#include <mach_ipi.h> 30#include <mach_ipi.h>
31 31
32/* This keeps a track of which one is crashing cpu. */
33static int crashing_cpu;
34 32
35#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC) 33#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
36static atomic_t waiting_for_crash_ipi;
37 34
38static int crash_nmi_callback(struct notifier_block *self, 35static void kdump_nmi_callback(int cpu, struct die_args *args)
39 unsigned long val, void *data)
40{ 36{
41 struct pt_regs *regs; 37 struct pt_regs *regs;
42#ifdef CONFIG_X86_32 38#ifdef CONFIG_X86_32
43 struct pt_regs fixed_regs; 39 struct pt_regs fixed_regs;
44#endif 40#endif
45 int cpu;
46 41
47 if (val != DIE_NMI_IPI) 42 regs = args->regs;
48 return NOTIFY_OK;
49
50 regs = ((struct die_args *)data)->regs;
51 cpu = raw_smp_processor_id();
52
53 /* Don't do anything if this handler is invoked on crashing cpu.
54 * Otherwise, system will completely hang. Crashing cpu can get
55 * an NMI if system was initially booted with nmi_watchdog parameter.
56 */
57 if (cpu == crashing_cpu)
58 return NOTIFY_STOP;
59 local_irq_disable();
60 43
61#ifdef CONFIG_X86_32 44#ifdef CONFIG_X86_32
62 if (!user_mode_vm(regs)) { 45 if (!user_mode_vm(regs)) {
@@ -65,51 +48,19 @@ static int crash_nmi_callback(struct notifier_block *self,
65 } 48 }
66#endif 49#endif
67 crash_save_cpu(regs, cpu); 50 crash_save_cpu(regs, cpu);
68 disable_local_APIC();
69 atomic_dec(&waiting_for_crash_ipi);
70 /* Assume hlt works */
71 halt();
72 for (;;)
73 cpu_relax();
74
75 return 1;
76}
77 51
78static void smp_send_nmi_allbutself(void) 52 disable_local_APIC();
79{
80 send_IPI_allbutself(NMI_VECTOR);
81} 53}
82 54
83static struct notifier_block crash_nmi_nb = { 55static void kdump_nmi_shootdown_cpus(void)
84 .notifier_call = crash_nmi_callback,
85};
86
87static void nmi_shootdown_cpus(void)
88{ 56{
89 unsigned long msecs; 57 nmi_shootdown_cpus(kdump_nmi_callback);
90
91 atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
92 /* Would it be better to replace the trap vector here? */
93 if (register_die_notifier(&crash_nmi_nb))
94 return; /* return what? */
95 /* Ensure the new callback function is set before sending
96 * out the NMI
97 */
98 wmb();
99 58
100 smp_send_nmi_allbutself();
101
102 msecs = 1000; /* Wait at most a second for the other cpus to stop */
103 while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
104 mdelay(1);
105 msecs--;
106 }
107
108 /* Leave the nmi callback set */
109 disable_local_APIC(); 59 disable_local_APIC();
110} 60}
61
111#else 62#else
112static void nmi_shootdown_cpus(void) 63static void kdump_nmi_shootdown_cpus(void)
113{ 64{
114 /* There are no cpus to shootdown */ 65 /* There are no cpus to shootdown */
115} 66}
@@ -128,9 +79,7 @@ void native_machine_crash_shutdown(struct pt_regs *regs)
128 /* The kernel is broken so disable interrupts */ 79 /* The kernel is broken so disable interrupts */
129 local_irq_disable(); 80 local_irq_disable();
130 81
131 /* Make a note of crashing cpu. Will be used in NMI callback.*/ 82 kdump_nmi_shootdown_cpus();
132 crashing_cpu = safe_smp_processor_id();
133 nmi_shootdown_cpus();
134 lapic_shutdown(); 83 lapic_shutdown();
135#if defined(CONFIG_X86_IO_APIC) 84#if defined(CONFIG_X86_IO_APIC)
136 disable_IO_APIC(); 85 disable_IO_APIC();
diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index 7a385746509a..37f420018a41 100644
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -13,6 +13,7 @@
13#include <linux/numa.h> 13#include <linux/numa.h>
14#include <linux/ftrace.h> 14#include <linux/ftrace.h>
15#include <linux/suspend.h> 15#include <linux/suspend.h>
16#include <linux/gfp.h>
16 17
17#include <asm/pgtable.h> 18#include <asm/pgtable.h>
18#include <asm/pgalloc.h> 19#include <asm/pgalloc.h>
@@ -25,15 +26,6 @@
25#include <asm/system.h> 26#include <asm/system.h>
26#include <asm/cacheflush.h> 27#include <asm/cacheflush.h>
27 28
28#define PAGE_ALIGNED __attribute__ ((__aligned__(PAGE_SIZE)))
29static u32 kexec_pgd[1024] PAGE_ALIGNED;
30#ifdef CONFIG_X86_PAE
31static u32 kexec_pmd0[1024] PAGE_ALIGNED;
32static u32 kexec_pmd1[1024] PAGE_ALIGNED;
33#endif
34static u32 kexec_pte0[1024] PAGE_ALIGNED;
35static u32 kexec_pte1[1024] PAGE_ALIGNED;
36
37static void set_idt(void *newidt, __u16 limit) 29static void set_idt(void *newidt, __u16 limit)
38{ 30{
39 struct desc_ptr curidt; 31 struct desc_ptr curidt;
@@ -76,6 +68,76 @@ static void load_segments(void)
76#undef __STR 68#undef __STR
77} 69}
78 70
71static void machine_kexec_free_page_tables(struct kimage *image)
72{
73 free_page((unsigned long)image->arch.pgd);
74#ifdef CONFIG_X86_PAE
75 free_page((unsigned long)image->arch.pmd0);
76 free_page((unsigned long)image->arch.pmd1);
77#endif
78 free_page((unsigned long)image->arch.pte0);
79 free_page((unsigned long)image->arch.pte1);
80}
81
82static int machine_kexec_alloc_page_tables(struct kimage *image)
83{
84 image->arch.pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
85#ifdef CONFIG_X86_PAE
86 image->arch.pmd0 = (pmd_t *)get_zeroed_page(GFP_KERNEL);
87 image->arch.pmd1 = (pmd_t *)get_zeroed_page(GFP_KERNEL);
88#endif
89 image->arch.pte0 = (pte_t *)get_zeroed_page(GFP_KERNEL);
90 image->arch.pte1 = (pte_t *)get_zeroed_page(GFP_KERNEL);
91 if (!image->arch.pgd ||
92#ifdef CONFIG_X86_PAE
93 !image->arch.pmd0 || !image->arch.pmd1 ||
94#endif
95 !image->arch.pte0 || !image->arch.pte1) {
96 machine_kexec_free_page_tables(image);
97 return -ENOMEM;
98 }
99 return 0;
100}
101
102static void machine_kexec_page_table_set_one(
103 pgd_t *pgd, pmd_t *pmd, pte_t *pte,
104 unsigned long vaddr, unsigned long paddr)
105{
106 pud_t *pud;
107
108 pgd += pgd_index(vaddr);
109#ifdef CONFIG_X86_PAE
110 if (!(pgd_val(*pgd) & _PAGE_PRESENT))
111 set_pgd(pgd, __pgd(__pa(pmd) | _PAGE_PRESENT));
112#endif
113 pud = pud_offset(pgd, vaddr);
114 pmd = pmd_offset(pud, vaddr);
115 if (!(pmd_val(*pmd) & _PAGE_PRESENT))
116 set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
117 pte = pte_offset_kernel(pmd, vaddr);
118 set_pte(pte, pfn_pte(paddr >> PAGE_SHIFT, PAGE_KERNEL_EXEC));
119}
120
121static void machine_kexec_prepare_page_tables(struct kimage *image)
122{
123 void *control_page;
124 pmd_t *pmd = 0;
125
126 control_page = page_address(image->control_code_page);
127#ifdef CONFIG_X86_PAE
128 pmd = image->arch.pmd0;
129#endif
130 machine_kexec_page_table_set_one(
131 image->arch.pgd, pmd, image->arch.pte0,
132 (unsigned long)control_page, __pa(control_page));
133#ifdef CONFIG_X86_PAE
134 pmd = image->arch.pmd1;
135#endif
136 machine_kexec_page_table_set_one(
137 image->arch.pgd, pmd, image->arch.pte1,
138 __pa(control_page), __pa(control_page));
139}
140
79/* 141/*
80 * A architecture hook called to validate the 142 * A architecture hook called to validate the
81 * proposed image and prepare the control pages 143 * proposed image and prepare the control pages
@@ -87,12 +149,20 @@ static void load_segments(void)
87 * reboot code buffer to allow us to avoid allocations 149 * reboot code buffer to allow us to avoid allocations
88 * later. 150 * later.
89 * 151 *
90 * Make control page executable. 152 * - Make control page executable.
153 * - Allocate page tables
154 * - Setup page tables
91 */ 155 */
92int machine_kexec_prepare(struct kimage *image) 156int machine_kexec_prepare(struct kimage *image)
93{ 157{
158 int error;
159
94 if (nx_enabled) 160 if (nx_enabled)
95 set_pages_x(image->control_code_page, 1); 161 set_pages_x(image->control_code_page, 1);
162 error = machine_kexec_alloc_page_tables(image);
163 if (error)
164 return error;
165 machine_kexec_prepare_page_tables(image);
96 return 0; 166 return 0;
97} 167}
98 168
@@ -104,6 +174,7 @@ void machine_kexec_cleanup(struct kimage *image)
104{ 174{
105 if (nx_enabled) 175 if (nx_enabled)
106 set_pages_nx(image->control_code_page, 1); 176 set_pages_nx(image->control_code_page, 1);
177 machine_kexec_free_page_tables(image);
107} 178}
108 179
109/* 180/*
@@ -150,18 +221,7 @@ void machine_kexec(struct kimage *image)
150 relocate_kernel_ptr = control_page; 221 relocate_kernel_ptr = control_page;
151 page_list[PA_CONTROL_PAGE] = __pa(control_page); 222 page_list[PA_CONTROL_PAGE] = __pa(control_page);
152 page_list[VA_CONTROL_PAGE] = (unsigned long)control_page; 223 page_list[VA_CONTROL_PAGE] = (unsigned long)control_page;
153 page_list[PA_PGD] = __pa(kexec_pgd); 224 page_list[PA_PGD] = __pa(image->arch.pgd);
154 page_list[VA_PGD] = (unsigned long)kexec_pgd;
155#ifdef CONFIG_X86_PAE
156 page_list[PA_PMD_0] = __pa(kexec_pmd0);
157 page_list[VA_PMD_0] = (unsigned long)kexec_pmd0;
158 page_list[PA_PMD_1] = __pa(kexec_pmd1);
159 page_list[VA_PMD_1] = (unsigned long)kexec_pmd1;
160#endif
161 page_list[PA_PTE_0] = __pa(kexec_pte0);
162 page_list[VA_PTE_0] = (unsigned long)kexec_pte0;
163 page_list[PA_PTE_1] = __pa(kexec_pte1);
164 page_list[VA_PTE_1] = (unsigned long)kexec_pte1;
165 225
166 if (image->type == KEXEC_TYPE_DEFAULT) 226 if (image->type == KEXEC_TYPE_DEFAULT)
167 page_list[PA_SWAP_PAGE] = (page_to_pfn(image->swap_page) 227 page_list[PA_SWAP_PAGE] = (page_to_pfn(image->swap_page)
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 0e3dbc7b2bdb..ba7b9a0e6063 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -21,6 +21,9 @@
21# include <asm/iommu.h> 21# include <asm/iommu.h>
22#endif 22#endif
23 23
24#include <mach_ipi.h>
25
26
24/* 27/*
25 * Power off function, if any 28 * Power off function, if any
26 */ 29 */
@@ -548,3 +551,92 @@ void machine_crash_shutdown(struct pt_regs *regs)
548 machine_ops.crash_shutdown(regs); 551 machine_ops.crash_shutdown(regs);
549} 552}
550#endif 553#endif
554
555
556#if defined(CONFIG_SMP)
557
558/* This keeps a track of which one is crashing cpu. */
559static int crashing_cpu;
560static nmi_shootdown_cb shootdown_callback;
561
562static atomic_t waiting_for_crash_ipi;
563
564static int crash_nmi_callback(struct notifier_block *self,
565 unsigned long val, void *data)
566{
567 int cpu;
568
569 if (val != DIE_NMI_IPI)
570 return NOTIFY_OK;
571
572 cpu = raw_smp_processor_id();
573
574 /* Don't do anything if this handler is invoked on crashing cpu.
575 * Otherwise, system will completely hang. Crashing cpu can get
576 * an NMI if system was initially booted with nmi_watchdog parameter.
577 */
578 if (cpu == crashing_cpu)
579 return NOTIFY_STOP;
580 local_irq_disable();
581
582 shootdown_callback(cpu, (struct die_args *)data);
583
584 atomic_dec(&waiting_for_crash_ipi);
585 /* Assume hlt works */
586 halt();
587 for (;;)
588 cpu_relax();
589
590 return 1;
591}
592
593static void smp_send_nmi_allbutself(void)
594{
595 send_IPI_allbutself(NMI_VECTOR);
596}
597
598static struct notifier_block crash_nmi_nb = {
599 .notifier_call = crash_nmi_callback,
600};
601
602/* Halt all other CPUs, calling the specified function on each of them
603 *
604 * This function can be used to halt all other CPUs on crash
605 * or emergency reboot time. The function passed as parameter
606 * will be called inside a NMI handler on all CPUs.
607 */
608void nmi_shootdown_cpus(nmi_shootdown_cb callback)
609{
610 unsigned long msecs;
611 local_irq_disable();
612
613 /* Make a note of crashing cpu. Will be used in NMI callback.*/
614 crashing_cpu = safe_smp_processor_id();
615
616 shootdown_callback = callback;
617
618 atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
619 /* Would it be better to replace the trap vector here? */
620 if (register_die_notifier(&crash_nmi_nb))
621 return; /* return what? */
622 /* Ensure the new callback function is set before sending
623 * out the NMI
624 */
625 wmb();
626
627 smp_send_nmi_allbutself();
628
629 msecs = 1000; /* Wait at most a second for the other cpus to stop */
630 while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
631 mdelay(1);
632 msecs--;
633 }
634
635 /* Leave the nmi callback set */
636}
637#else /* !CONFIG_SMP */
638void nmi_shootdown_cpus(nmi_shootdown_cb callback)
639{
640 /* No other CPUs to shoot down */
641}
642#endif
diff --git a/arch/x86/kernel/relocate_kernel_32.S b/arch/x86/kernel/relocate_kernel_32.S
index 6f50664b2ba5..a160f3119725 100644
--- a/arch/x86/kernel/relocate_kernel_32.S
+++ b/arch/x86/kernel/relocate_kernel_32.S
@@ -10,15 +10,12 @@
10#include <asm/page.h> 10#include <asm/page.h>
11#include <asm/kexec.h> 11#include <asm/kexec.h>
12#include <asm/processor-flags.h> 12#include <asm/processor-flags.h>
13#include <asm/pgtable.h>
14 13
15/* 14/*
16 * Must be relocatable PIC code callable as a C function 15 * Must be relocatable PIC code callable as a C function
17 */ 16 */
18 17
19#define PTR(x) (x << 2) 18#define PTR(x) (x << 2)
20#define PAGE_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
21#define PAE_PGD_ATTR (_PAGE_PRESENT)
22 19
23/* control_page + KEXEC_CONTROL_CODE_MAX_SIZE 20/* control_page + KEXEC_CONTROL_CODE_MAX_SIZE
24 * ~ control_page + PAGE_SIZE are used as data storage and stack for 21 * ~ control_page + PAGE_SIZE are used as data storage and stack for
@@ -39,7 +36,6 @@
39#define CP_PA_BACKUP_PAGES_MAP DATA(0x1c) 36#define CP_PA_BACKUP_PAGES_MAP DATA(0x1c)
40 37
41 .text 38 .text
42 .align PAGE_SIZE
43 .globl relocate_kernel 39 .globl relocate_kernel
44relocate_kernel: 40relocate_kernel:
45 /* Save the CPU context, used for jumping back */ 41 /* Save the CPU context, used for jumping back */
@@ -60,117 +56,6 @@ relocate_kernel:
60 movl %cr4, %eax 56 movl %cr4, %eax
61 movl %eax, CR4(%edi) 57 movl %eax, CR4(%edi)
62 58
63#ifdef CONFIG_X86_PAE
64 /* map the control page at its virtual address */
65
66 movl PTR(VA_PGD)(%ebp), %edi
67 movl PTR(VA_CONTROL_PAGE)(%ebp), %eax
68 andl $0xc0000000, %eax
69 shrl $27, %eax
70 addl %edi, %eax
71
72 movl PTR(PA_PMD_0)(%ebp), %edx
73 orl $PAE_PGD_ATTR, %edx
74 movl %edx, (%eax)
75
76 movl PTR(VA_PMD_0)(%ebp), %edi
77 movl PTR(VA_CONTROL_PAGE)(%ebp), %eax
78 andl $0x3fe00000, %eax
79 shrl $18, %eax
80 addl %edi, %eax
81
82 movl PTR(PA_PTE_0)(%ebp), %edx
83 orl $PAGE_ATTR, %edx
84 movl %edx, (%eax)
85
86 movl PTR(VA_PTE_0)(%ebp), %edi
87 movl PTR(VA_CONTROL_PAGE)(%ebp), %eax
88 andl $0x001ff000, %eax
89 shrl $9, %eax
90 addl %edi, %eax
91
92 movl PTR(PA_CONTROL_PAGE)(%ebp), %edx
93 orl $PAGE_ATTR, %edx
94 movl %edx, (%eax)
95
96 /* identity map the control page at its physical address */
97
98 movl PTR(VA_PGD)(%ebp), %edi
99 movl PTR(PA_CONTROL_PAGE)(%ebp), %eax
100 andl $0xc0000000, %eax
101 shrl $27, %eax
102 addl %edi, %eax
103
104 movl PTR(PA_PMD_1)(%ebp), %edx
105 orl $PAE_PGD_ATTR, %edx
106 movl %edx, (%eax)
107
108 movl PTR(VA_PMD_1)(%ebp), %edi
109 movl PTR(PA_CONTROL_PAGE)(%ebp), %eax
110 andl $0x3fe00000, %eax
111 shrl $18, %eax
112 addl %edi, %eax
113
114 movl PTR(PA_PTE_1)(%ebp), %edx
115 orl $PAGE_ATTR, %edx
116 movl %edx, (%eax)
117
118 movl PTR(VA_PTE_1)(%ebp), %edi
119 movl PTR(PA_CONTROL_PAGE)(%ebp), %eax
120 andl $0x001ff000, %eax
121 shrl $9, %eax
122 addl %edi, %eax
123
124 movl PTR(PA_CONTROL_PAGE)(%ebp), %edx
125 orl $PAGE_ATTR, %edx
126 movl %edx, (%eax)
127#else
128 /* map the control page at its virtual address */
129
130 movl PTR(VA_PGD)(%ebp), %edi
131 movl PTR(VA_CONTROL_PAGE)(%ebp), %eax
132 andl $0xffc00000, %eax
133 shrl $20, %eax
134 addl %edi, %eax
135
136 movl PTR(PA_PTE_0)(%ebp), %edx
137 orl $PAGE_ATTR, %edx
138 movl %edx, (%eax)
139
140 movl PTR(VA_PTE_0)(%ebp), %edi
141 movl PTR(VA_CONTROL_PAGE)(%ebp), %eax
142 andl $0x003ff000, %eax
143 shrl $10, %eax
144 addl %edi, %eax
145
146 movl PTR(PA_CONTROL_PAGE)(%ebp), %edx
147 orl $PAGE_ATTR, %edx
148 movl %edx, (%eax)
149
150 /* identity map the control page at its physical address */
151
152 movl PTR(VA_PGD)(%ebp), %edi
153 movl PTR(PA_CONTROL_PAGE)(%ebp), %eax
154 andl $0xffc00000, %eax
155 shrl $20, %eax
156 addl %edi, %eax
157
158 movl PTR(PA_PTE_1)(%ebp), %edx
159 orl $PAGE_ATTR, %edx
160 movl %edx, (%eax)
161
162 movl PTR(VA_PTE_1)(%ebp), %edi
163 movl PTR(PA_CONTROL_PAGE)(%ebp), %eax
164 andl $0x003ff000, %eax
165 shrl $10, %eax
166 addl %edi, %eax
167
168 movl PTR(PA_CONTROL_PAGE)(%ebp), %edx
169 orl $PAGE_ATTR, %edx
170 movl %edx, (%eax)
171#endif
172
173relocate_new_kernel:
174 /* read the arguments and say goodbye to the stack */ 59 /* read the arguments and say goodbye to the stack */
175 movl 20+4(%esp), %ebx /* page_list */ 60 movl 20+4(%esp), %ebx /* page_list */
176 movl 20+8(%esp), %ebp /* list of pages */ 61 movl 20+8(%esp), %ebp /* list of pages */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-23 05:30:50 -0500