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> 17#include <linux/efi.h> 18#include <linux/numa.h> 19#include <linux/mmzone.h> 20 21#include <asm/numa.h> 22#include <asm/mmu_context.h> 23#include <asm/setup.h> 24#include <asm/delay.h> 25#include <asm/meminit.h> 26#include <asm/processor.h> 27#include <asm/sal.h> 28#include <asm/mca.h> 29 30typedef 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; 35 36struct kimage *ia64_kimage; 37 38struct resource efi_memmap_res = { 39 .name = "EFI Memory Map", 40 .start = 0, 41 .end = 0, 42 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 43}; 44 45struct 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 */ 58int 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 75void machine_kexec_cleanup(struct kimage *image) 76{ 77} 78 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 */ 83static 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); 89 int ii; 90 u64 fp, gp; 91 ia64_fptr_t *init_handler = (ia64_fptr_t *)ia64_os_init_on_kdump; 92 93 BUG_ON(!image); 94 if (image->type == KEXEC_TYPE_CRASH) { 95 crash_save_this_cpu(); 96 current->thread.ksp = (__u64)info->sw - 16; 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); 105 } 106 107 /* Unregister mca handler - No more recovery on current kernel */ 108 ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, 0, 0, 0, 0, 0, 0); 109 110 /* 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(); 129 while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR) 130 ia64_eoi(); 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 138void machine_kexec(struct kimage *image) 139{ 140 BUG_ON(!image); 141 unw_init_running(ia64_machine_kexec, image); 142 for(;;); 143} 144 145void arch_crash_save_vmcoreinfo(void) 146{ 147#if defined(CONFIG_DISCONTIGMEM) || defined(CONFIG_SPARSEMEM) 148 VMCOREINFO_SYMBOL(pgdat_list); 149 VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES); 150#endif 151#ifdef CONFIG_NUMA 152 VMCOREINFO_SYMBOL(node_memblk); 153 VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS); 154 VMCOREINFO_STRUCT_SIZE(node_memblk_s); 155 VMCOREINFO_OFFSET(node_memblk_s, start_paddr); 156 VMCOREINFO_OFFSET(node_memblk_s, size); 157#endif 158#ifdef CONFIG_PGTABLE_3 159 VMCOREINFO_CONFIG(PGTABLE_3); 160#elif CONFIG_PGTABLE_4 161 VMCOREINFO_CONFIG(PGTABLE_4); 162#endif 163} 164 165unsigned long paddr_vmcoreinfo_note(void) 166{ 167 return ia64_tpa((unsigned long)(char *)&vmcoreinfo_note); 168} 169