215 lines
6.0 KiB
C
215 lines
6.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_KEXEC_H
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#define _ASM_POWERPC_KEXEC_H
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#ifdef __KERNEL__
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#if defined(CONFIG_PPC_85xx) || defined(CONFIG_44x)
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/*
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* On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory
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* and therefore we can only deal with memory within this range
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*/
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#define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
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#define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
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#define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
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#else
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/*
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* Maximum page that is mapped directly into kernel memory.
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* XXX: Since we copy virt we can use any page we allocate
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*/
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#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
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/*
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* Maximum address we can reach in physical address mode.
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* XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
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*/
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#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
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/* Maximum address we can use for the control code buffer */
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#ifdef __powerpc64__
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#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
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#else
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/* TASK_SIZE, probably left over from use_mm ?? */
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#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
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#endif
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#endif
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#define KEXEC_CONTROL_PAGE_SIZE 4096
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/* The native architecture */
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#ifdef __powerpc64__
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#define KEXEC_ARCH KEXEC_ARCH_PPC64
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#else
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#define KEXEC_ARCH KEXEC_ARCH_PPC
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#endif
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#define KEXEC_STATE_NONE 0
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#define KEXEC_STATE_IRQS_OFF 1
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#define KEXEC_STATE_REAL_MODE 2
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#ifndef __ASSEMBLY__
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#include <asm/reg.h>
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typedef void (*crash_shutdown_t)(void);
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#ifdef CONFIG_KEXEC_CORE
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struct kimage;
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struct pt_regs;
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extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
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master to copy new code to 0 */
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extern void default_machine_kexec(struct kimage *image);
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extern void machine_kexec_mask_interrupts(void);
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void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer,
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unsigned long start_address) __noreturn;
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void kexec_copy_flush(struct kimage *image);
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#ifdef CONFIG_KEXEC_FILE
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extern const struct kexec_file_ops kexec_elf64_ops;
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#define ARCH_HAS_KIMAGE_ARCH
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struct kimage_arch {
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struct crash_mem *exclude_ranges;
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unsigned long backup_start;
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void *backup_buf;
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void *fdt;
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};
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char *setup_kdump_cmdline(struct kimage *image, char *cmdline,
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unsigned long cmdline_len);
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int setup_purgatory(struct kimage *image, const void *slave_code,
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const void *fdt, unsigned long kernel_load_addr,
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unsigned long fdt_load_addr);
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#ifdef CONFIG_PPC64
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struct kexec_buf;
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int arch_kexec_kernel_image_probe(struct kimage *image, void *buf, unsigned long buf_len);
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#define arch_kexec_kernel_image_probe arch_kexec_kernel_image_probe
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int arch_kimage_file_post_load_cleanup(struct kimage *image);
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#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
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int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf);
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#define arch_kexec_locate_mem_hole arch_kexec_locate_mem_hole
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int load_crashdump_segments_ppc64(struct kimage *image,
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struct kexec_buf *kbuf);
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int setup_purgatory_ppc64(struct kimage *image, const void *slave_code,
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const void *fdt, unsigned long kernel_load_addr,
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unsigned long fdt_load_addr);
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unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image, struct crash_mem *rmem);
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int setup_new_fdt_ppc64(const struct kimage *image, void *fdt, struct crash_mem *rmem);
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#endif /* CONFIG_PPC64 */
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#endif /* CONFIG_KEXEC_FILE */
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#endif /* CONFIG_KEXEC_CORE */
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#ifdef CONFIG_CRASH_RESERVE
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int __init overlaps_crashkernel(unsigned long start, unsigned long size);
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extern void reserve_crashkernel(void);
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#else
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static inline void reserve_crashkernel(void) {}
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static inline int overlaps_crashkernel(unsigned long start, unsigned long size) { return 0; }
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#endif
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#if defined(CONFIG_CRASH_DUMP)
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/*
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* This function is responsible for capturing register states if coming
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* via panic or invoking dump using sysrq-trigger.
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*/
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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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{
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if (oldregs)
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memcpy(newregs, oldregs, sizeof(*newregs));
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else
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ppc_save_regs(newregs);
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}
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#ifdef CONFIG_CRASH_HOTPLUG
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void arch_crash_handle_hotplug_event(struct kimage *image, void *arg);
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#define arch_crash_handle_hotplug_event arch_crash_handle_hotplug_event
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int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags);
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#define arch_crash_hotplug_support arch_crash_hotplug_support
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unsigned int arch_crash_get_elfcorehdr_size(void);
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#define crash_get_elfcorehdr_size arch_crash_get_elfcorehdr_size
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#endif /* CONFIG_CRASH_HOTPLUG */
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extern int crashing_cpu;
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extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
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extern void crash_ipi_callback(struct pt_regs *regs);
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extern int crash_wake_offline;
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extern int crash_shutdown_register(crash_shutdown_t handler);
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extern int crash_shutdown_unregister(crash_shutdown_t handler);
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extern void default_machine_crash_shutdown(struct pt_regs *regs);
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extern void crash_kexec_prepare(void);
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extern void crash_kexec_secondary(struct pt_regs *regs);
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static inline bool kdump_in_progress(void)
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{
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return crashing_cpu >= 0;
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}
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bool is_kdump_kernel(void);
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#define is_kdump_kernel is_kdump_kernel
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#if defined(CONFIG_PPC_RTAS)
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void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
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#define crash_free_reserved_phys_range crash_free_reserved_phys_range
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#endif /* CONFIG_PPC_RTAS */
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#else /* !CONFIG_CRASH_DUMP */
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static inline void crash_kexec_secondary(struct pt_regs *regs) { }
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static inline int crash_shutdown_register(crash_shutdown_t handler)
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{
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return 0;
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}
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static inline int crash_shutdown_unregister(crash_shutdown_t handler)
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{
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return 0;
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}
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static inline bool kdump_in_progress(void)
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{
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return false;
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}
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static inline void crash_ipi_callback(struct pt_regs *regs) { }
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static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *))
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{
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}
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#endif /* CONFIG_CRASH_DUMP */
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#if defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP)
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int update_cpus_node(void *fdt);
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#endif
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#ifdef CONFIG_PPC_BOOK3S_64
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#include <asm/book3s/64/kexec.h>
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#endif
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#ifndef reset_sprs
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#define reset_sprs reset_sprs
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static inline void reset_sprs(void)
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{
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}
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#endif
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#endif /* ! __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_KEXEC_H */
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