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181 lines
4.7 KiB
181 lines
4.7 KiB
/* 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_FSL_BOOKE) || 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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/* |
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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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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 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 *); |
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extern int crash_wake_offline; |
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struct kimage; |
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struct pt_regs; |
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extern void default_machine_kexec(struct kimage *image); |
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extern int default_machine_kexec_prepare(struct kimage *image); |
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extern void default_machine_crash_shutdown(struct pt_regs *regs); |
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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 crash_kexec_secondary(struct pt_regs *regs); |
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extern int overlaps_crashkernel(unsigned long start, unsigned long size); |
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extern void reserve_crashkernel(void); |
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extern void machine_kexec_mask_interrupts(void); |
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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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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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#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 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); |
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int setup_new_fdt_ppc64(const struct kimage *image, void *fdt, |
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unsigned long initrd_load_addr, |
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unsigned long initrd_len, const char *cmdline); |
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#endif /* CONFIG_PPC64 */ |
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#endif /* CONFIG_KEXEC_FILE */ |
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#else /* !CONFIG_KEXEC_CORE */ |
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static inline void crash_kexec_secondary(struct pt_regs *regs) { } |
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static inline int overlaps_crashkernel(unsigned long start, unsigned long size) |
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{ |
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return 0; |
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} |
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static inline void reserve_crashkernel(void) { ; } |
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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_KEXEC_CORE */ |
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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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