/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 2005
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*
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* Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
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*
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*/
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#ifndef _S390_KEXEC_H
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#define _S390_KEXEC_H
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#include <asm/processor.h>
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#include <asm/page.h>
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/*
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* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
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* I.e. Maximum page that is mapped directly into kernel memory,
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* and kmap is not required.
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*/
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/* Maximum physical address we can use pages from */
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#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
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/* Maximum address we can reach in physical address mode */
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#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
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/* Maximum address we can use for the control pages */
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/* Not more than 2GB */
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#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
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/* Allocate control page with GFP_DMA */
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#define KEXEC_CONTROL_MEMORY_GFP GFP_DMA
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/* Maximum address we can use for the crash control pages */
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#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
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/* Allocate one page for the pdp and the second for the code */
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#define KEXEC_CONTROL_PAGE_SIZE 4096
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/* Alignment of crashkernel memory */
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#define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
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/* The native architecture */
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#define KEXEC_ARCH KEXEC_ARCH_S390
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/* Provide a dummy definition to avoid build failures. */
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static inline void crash_setup_regs(struct pt_regs *newregs,
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struct pt_regs *oldregs) { }
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struct kimage;
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struct s390_load_data {
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/* Pointer to the kernel buffer. Used to register cmdline etc.. */
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void *kernel_buf;
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/* Total size of loaded segments in memory. Used as an offset. */
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size_t memsz;
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/* Load address of initrd. Used to register INITRD_START in kernel. */
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unsigned long initrd_load_addr;
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};
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int kexec_file_add_purgatory(struct kimage *image,
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struct s390_load_data *data);
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int kexec_file_add_initrd(struct kimage *image,
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struct s390_load_data *data,
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char *initrd, unsigned long initrd_len);
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int *kexec_file_update_kernel(struct kimage *iamge,
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struct s390_load_data *data);
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extern const struct kexec_file_ops s390_kexec_image_ops;
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extern const struct kexec_file_ops s390_kexec_elf_ops;
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#endif /*_S390_KEXEC_H */
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