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163 lines
4.4 KiB
163 lines
4.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* arch/ia64/kernel/machine_kexec.c |
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* |
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* Handle transition of Linux booting another kernel |
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* Copyright (C) 2005 Hewlett-Packard Development Comapny, L.P. |
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* Copyright (C) 2005 Khalid Aziz <[email protected]> |
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* Copyright (C) 2006 Intel Corp, Zou Nan hai <[email protected]> |
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*/ |
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#include <linux/mm.h> |
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#include <linux/kexec.h> |
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#include <linux/cpu.h> |
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#include <linux/irq.h> |
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#include <linux/efi.h> |
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#include <linux/numa.h> |
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#include <linux/mmzone.h> |
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#include <asm/efi.h> |
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#include <asm/numa.h> |
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#include <asm/mmu_context.h> |
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#include <asm/setup.h> |
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#include <asm/delay.h> |
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#include <asm/meminit.h> |
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#include <asm/processor.h> |
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#include <asm/sal.h> |
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#include <asm/mca.h> |
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typedef void (*relocate_new_kernel_t)( |
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unsigned long indirection_page, |
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unsigned long start_address, |
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struct ia64_boot_param *boot_param, |
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unsigned long pal_addr) __noreturn; |
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struct kimage *ia64_kimage; |
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struct resource efi_memmap_res = { |
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.name = "EFI Memory Map", |
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.start = 0, |
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.end = 0, |
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM |
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}; |
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struct resource boot_param_res = { |
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.name = "Boot parameter", |
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.start = 0, |
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.end = 0, |
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM |
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}; |
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/* |
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* Do what every setup is needed on image and the |
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* reboot code buffer to allow us to avoid allocations |
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* later. |
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*/ |
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int machine_kexec_prepare(struct kimage *image) |
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{ |
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void *control_code_buffer; |
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const unsigned long *func; |
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func = (unsigned long *)&relocate_new_kernel; |
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/* Pre-load control code buffer to minimize work in kexec path */ |
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control_code_buffer = page_address(image->control_code_page); |
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memcpy((void *)control_code_buffer, (const void *)func[0], |
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relocate_new_kernel_size); |
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flush_icache_range((unsigned long)control_code_buffer, |
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(unsigned long)control_code_buffer + relocate_new_kernel_size); |
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ia64_kimage = image; |
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return 0; |
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} |
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void machine_kexec_cleanup(struct kimage *image) |
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{ |
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} |
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/* |
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* Do not allocate memory (or fail in any way) in machine_kexec(). |
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* We are past the point of no return, committed to rebooting now. |
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*/ |
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static void ia64_machine_kexec(struct unw_frame_info *info, void *arg) |
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{ |
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struct kimage *image = arg; |
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relocate_new_kernel_t rnk; |
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void *pal_addr = efi_get_pal_addr(); |
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unsigned long code_addr; |
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int ii; |
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u64 fp, gp; |
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ia64_fptr_t *init_handler = (ia64_fptr_t *)ia64_os_init_on_kdump; |
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BUG_ON(!image); |
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code_addr = (unsigned long)page_address(image->control_code_page); |
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if (image->type == KEXEC_TYPE_CRASH) { |
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crash_save_this_cpu(); |
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current->thread.ksp = (__u64)info->sw - 16; |
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/* Register noop init handler */ |
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fp = ia64_tpa(init_handler->fp); |
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gp = ia64_tpa(ia64_getreg(_IA64_REG_GP)); |
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ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, fp, gp, 0, fp, gp, 0); |
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} else { |
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/* Unregister init handlers of current kernel */ |
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ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, 0, 0, 0, 0, 0, 0); |
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} |
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/* Unregister mca handler - No more recovery on current kernel */ |
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ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, 0, 0, 0, 0, 0, 0); |
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/* Interrupts aren't acceptable while we reboot */ |
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local_irq_disable(); |
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/* Mask CMC and Performance Monitor interrupts */ |
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ia64_setreg(_IA64_REG_CR_PMV, 1 << 16); |
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ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16); |
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/* Mask ITV and Local Redirect Registers */ |
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ia64_set_itv(1 << 16); |
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ia64_set_lrr0(1 << 16); |
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ia64_set_lrr1(1 << 16); |
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/* terminate possible nested in-service interrupts */ |
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for (ii = 0; ii < 16; ii++) |
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ia64_eoi(); |
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/* unmask TPR and clear any pending interrupts */ |
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ia64_setreg(_IA64_REG_CR_TPR, 0); |
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ia64_srlz_d(); |
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while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR) |
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ia64_eoi(); |
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rnk = (relocate_new_kernel_t)&code_addr; |
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(*rnk)(image->head, image->start, ia64_boot_param, |
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GRANULEROUNDDOWN((unsigned long) pal_addr)); |
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BUG(); |
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} |
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void machine_kexec(struct kimage *image) |
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{ |
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BUG_ON(!image); |
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unw_init_running(ia64_machine_kexec, image); |
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for(;;); |
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} |
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void arch_crash_save_vmcoreinfo(void) |
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{ |
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#if defined(CONFIG_DISCONTIGMEM) || defined(CONFIG_SPARSEMEM) |
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VMCOREINFO_SYMBOL(pgdat_list); |
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VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES); |
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#endif |
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#ifdef CONFIG_NUMA |
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VMCOREINFO_SYMBOL(node_memblk); |
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VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS); |
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VMCOREINFO_STRUCT_SIZE(node_memblk_s); |
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VMCOREINFO_OFFSET(node_memblk_s, start_paddr); |
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VMCOREINFO_OFFSET(node_memblk_s, size); |
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#endif |
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#if CONFIG_PGTABLE_LEVELS == 3 |
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VMCOREINFO_CONFIG(PGTABLE_3); |
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#elif CONFIG_PGTABLE_LEVELS == 4 |
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VMCOREINFO_CONFIG(PGTABLE_4); |
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#endif |
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} |
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