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a7956113 ZN |
1 | /* |
2 | * arch/ia64/kernel/machine_kexec.c | |
3 | * | |
4 | * Handle transition of Linux booting another kernel | |
5 | * Copyright (C) 2005 Hewlett-Packard Development Comapny, L.P. | |
6 | * Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com> | |
7 | * Copyright (C) 2006 Intel Corp, Zou Nan hai <nanhai.zou@intel.com> | |
8 | * | |
9 | * This source code is licensed under the GNU General Public License, | |
10 | * Version 2. See the file COPYING for more details. | |
11 | */ | |
12 | ||
13 | #include <linux/mm.h> | |
14 | #include <linux/kexec.h> | |
15 | #include <linux/cpu.h> | |
16 | #include <linux/irq.h> | |
abac08db | 17 | #include <linux/efi.h> |
fd59d231 KO |
18 | #include <linux/numa.h> |
19 | #include <linux/mmzone.h> | |
7259888e AM |
20 | |
21 | #include <asm/numa.h> | |
a7956113 ZN |
22 | #include <asm/mmu_context.h> |
23 | #include <asm/setup.h> | |
24 | #include <asm/delay.h> | |
25 | #include <asm/meminit.h> | |
00cab92f | 26 | #include <asm/processor.h> |
07a6a4ae HS |
27 | #include <asm/sal.h> |
28 | #include <asm/mca.h> | |
a7956113 | 29 | |
53da5763 H |
30 | typedef NORET_TYPE void (*relocate_new_kernel_t)( |
31 | unsigned long indirection_page, | |
32 | unsigned long start_address, | |
33 | struct ia64_boot_param *boot_param, | |
34 | unsigned long pal_addr) ATTRIB_NORET; | |
a7956113 ZN |
35 | |
36 | struct kimage *ia64_kimage; | |
37 | ||
38 | struct resource efi_memmap_res = { | |
39 | .name = "EFI Memory Map", | |
40 | .start = 0, | |
41 | .end = 0, | |
42 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
43 | }; | |
44 | ||
45 | struct resource boot_param_res = { | |
46 | .name = "Boot parameter", | |
47 | .start = 0, | |
48 | .end = 0, | |
49 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
50 | }; | |
51 | ||
52 | ||
53 | /* | |
54 | * Do what every setup is needed on image and the | |
55 | * reboot code buffer to allow us to avoid allocations | |
56 | * later. | |
57 | */ | |
58 | int machine_kexec_prepare(struct kimage *image) | |
59 | { | |
60 | void *control_code_buffer; | |
61 | const unsigned long *func; | |
62 | ||
63 | func = (unsigned long *)&relocate_new_kernel; | |
64 | /* Pre-load control code buffer to minimize work in kexec path */ | |
65 | control_code_buffer = page_address(image->control_code_page); | |
66 | memcpy((void *)control_code_buffer, (const void *)func[0], | |
67 | relocate_new_kernel_size); | |
68 | flush_icache_range((unsigned long)control_code_buffer, | |
69 | (unsigned long)control_code_buffer + relocate_new_kernel_size); | |
70 | ia64_kimage = image; | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
75 | void machine_kexec_cleanup(struct kimage *image) | |
76 | { | |
77 | } | |
78 | ||
a7956113 ZN |
79 | /* |
80 | * Do not allocate memory (or fail in any way) in machine_kexec(). | |
81 | * We are past the point of no return, committed to rebooting now. | |
82 | */ | |
a7956113 ZN |
83 | static void ia64_machine_kexec(struct unw_frame_info *info, void *arg) |
84 | { | |
85 | struct kimage *image = arg; | |
86 | relocate_new_kernel_t rnk; | |
87 | void *pal_addr = efi_get_pal_addr(); | |
88 | unsigned long code_addr = (unsigned long)page_address(image->control_code_page); | |
a7956113 | 89 | int ii; |
07a6a4ae HS |
90 | u64 fp, gp; |
91 | ia64_fptr_t *init_handler = (ia64_fptr_t *)ia64_os_init_on_kdump; | |
a7956113 | 92 | |
c2c77fe8 | 93 | BUG_ON(!image); |
a7956113 ZN |
94 | if (image->type == KEXEC_TYPE_CRASH) { |
95 | crash_save_this_cpu(); | |
96 | current->thread.ksp = (__u64)info->sw - 16; | |
07a6a4ae HS |
97 | |
98 | /* Register noop init handler */ | |
99 | fp = ia64_tpa(init_handler->fp); | |
100 | gp = ia64_tpa(ia64_getreg(_IA64_REG_GP)); | |
101 | ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, fp, gp, 0, fp, gp, 0); | |
102 | } else { | |
103 | /* Unregister init handlers of current kernel */ | |
104 | ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, 0, 0, 0, 0, 0, 0); | |
a7956113 ZN |
105 | } |
106 | ||
6cc3efcd HS |
107 | /* Unregister mca handler - No more recovery on current kernel */ |
108 | ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, 0, 0, 0, 0, 0, 0); | |
109 | ||
a7956113 ZN |
110 | /* Interrupts aren't acceptable while we reboot */ |
111 | local_irq_disable(); | |
112 | ||
113 | /* Mask CMC and Performance Monitor interrupts */ | |
114 | ia64_setreg(_IA64_REG_CR_PMV, 1 << 16); | |
115 | ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16); | |
116 | ||
117 | /* Mask ITV and Local Redirect Registers */ | |
118 | ia64_set_itv(1 << 16); | |
119 | ia64_set_lrr0(1 << 16); | |
120 | ia64_set_lrr1(1 << 16); | |
121 | ||
122 | /* terminate possible nested in-service interrupts */ | |
123 | for (ii = 0; ii < 16; ii++) | |
124 | ia64_eoi(); | |
125 | ||
126 | /* unmask TPR and clear any pending interrupts */ | |
127 | ia64_setreg(_IA64_REG_CR_TPR, 0); | |
128 | ia64_srlz_d(); | |
a62c9fe4 | 129 | while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR) |
a7956113 | 130 | ia64_eoi(); |
a7956113 ZN |
131 | platform_kernel_launch_event(); |
132 | rnk = (relocate_new_kernel_t)&code_addr; | |
133 | (*rnk)(image->head, image->start, ia64_boot_param, | |
134 | GRANULEROUNDDOWN((unsigned long) pal_addr)); | |
135 | BUG(); | |
136 | } | |
137 | ||
138 | void machine_kexec(struct kimage *image) | |
139 | { | |
c2c77fe8 | 140 | BUG_ON(!image); |
a7956113 ZN |
141 | unw_init_running(ia64_machine_kexec, image); |
142 | for(;;); | |
143 | } | |
fd59d231 KO |
144 | |
145 | void arch_crash_save_vmcoreinfo(void) | |
146 | { | |
92df5c3e | 147 | #if defined(CONFIG_DISCONTIGMEM) || defined(CONFIG_SPARSEMEM) |
bcbba6c1 KO |
148 | VMCOREINFO_SYMBOL(pgdat_list); |
149 | VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES); | |
92df5c3e KO |
150 | #endif |
151 | #ifdef CONFIG_NUMA | |
bcbba6c1 KO |
152 | VMCOREINFO_SYMBOL(node_memblk); |
153 | VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS); | |
c76f860c | 154 | VMCOREINFO_STRUCT_SIZE(node_memblk_s); |
bcbba6c1 KO |
155 | VMCOREINFO_OFFSET(node_memblk_s, start_paddr); |
156 | VMCOREINFO_OFFSET(node_memblk_s, size); | |
fd59d231 KO |
157 | #endif |
158 | #ifdef CONFIG_PGTABLE_3 | |
bcbba6c1 | 159 | VMCOREINFO_CONFIG(PGTABLE_3); |
fd59d231 | 160 | #elif CONFIG_PGTABLE_4 |
bcbba6c1 | 161 | VMCOREINFO_CONFIG(PGTABLE_4); |
fd59d231 KO |
162 | #endif |
163 | } | |
164 | ||
165 | unsigned long paddr_vmcoreinfo_note(void) | |
166 | { | |
00cab92f | 167 | return ia64_tpa((unsigned long)(char *)&vmcoreinfo_note); |
fd59d231 KO |
168 | } |
169 |