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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_POWERPC_KEXEC_H #define _ASM_POWERPC_KEXEC_H #ifdef __KERNEL__ #if defined(CONFIG_FSL_BOOKE) || defined(CONFIG_44x) /* * On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory * and therefore we can only deal with memory within this range */ #define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) #define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) #define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) #else /* * Maximum page that is mapped directly into kernel memory. * XXX: Since we copy virt we can use any page we allocate */ #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) /* * Maximum address we can reach in physical address mode. * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR. */ #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) /* Maximum address we can use for the control code buffer */ #ifdef __powerpc64__ #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) #else /* TASK_SIZE, probably left over from use_mm ?? */ #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE #endif #endif #define KEXEC_CONTROL_PAGE_SIZE 4096 /* The native architecture */ #ifdef __powerpc64__ #define KEXEC_ARCH KEXEC_ARCH_PPC64 #else #define KEXEC_ARCH KEXEC_ARCH_PPC #endif #define KEXEC_STATE_NONE 0 #define KEXEC_STATE_IRQS_OFF 1 #define KEXEC_STATE_REAL_MODE 2 #ifndef __ASSEMBLY__ #include <asm/reg.h> typedef void (*crash_shutdown_t)(void); #ifdef CONFIG_KEXEC_CORE /* * This function is responsible for capturing register states if coming * via panic or invoking dump using sysrq-trigger. */ static inline void crash_setup_regs(struct pt_regs *newregs, struct pt_regs *oldregs) { if (oldregs) memcpy(newregs, oldregs, sizeof(*newregs)); else ppc_save_regs(newregs); } extern void kexec_smp_wait(void); /* get and clear naca physid, wait for master to copy new code to 0 */ extern int crashing_cpu; extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); extern void crash_ipi_callback(struct pt_regs *); extern int crash_wake_offline; struct kimage; struct pt_regs; extern void default_machine_kexec(struct kimage *image); extern int default_machine_kexec_prepare(struct kimage *image); extern void default_machine_crash_shutdown(struct pt_regs *regs); extern int crash_shutdown_register(crash_shutdown_t handler); extern int crash_shutdown_unregister(crash_shutdown_t handler); extern void crash_kexec_secondary(struct pt_regs *regs); extern int overlaps_crashkernel(unsigned long start, unsigned long size); extern void reserve_crashkernel(void); extern void machine_kexec_mask_interrupts(void); static inline bool kdump_in_progress(void) { return crashing_cpu >= 0; } void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer, unsigned long start_address) __noreturn; #ifdef CONFIG_KEXEC_FILE extern const struct kexec_file_ops kexec_elf64_ops; #ifdef CONFIG_IMA_KEXEC #define ARCH_HAS_KIMAGE_ARCH struct kimage_arch { phys_addr_t ima_buffer_addr; size_t ima_buffer_size; }; #endif int setup_purgatory(struct kimage *image, const void *slave_code, const void *fdt, unsigned long kernel_load_addr, unsigned long fdt_load_addr); int setup_new_fdt(const struct kimage *image, void *fdt, unsigned long initrd_load_addr, unsigned long initrd_len, const char *cmdline); int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size); #endif /* CONFIG_KEXEC_FILE */ #else /* !CONFIG_KEXEC_CORE */ static inline void crash_kexec_secondary(struct pt_regs *regs) { } static inline int overlaps_crashkernel(unsigned long start, unsigned long size) { return 0; } static inline void reserve_crashkernel(void) { ; } static inline int crash_shutdown_register(crash_shutdown_t handler) { return 0; } static inline int crash_shutdown_unregister(crash_shutdown_t handler) { return 0; } static inline bool kdump_in_progress(void) { return false; } static inline void crash_ipi_callback(struct pt_regs *regs) { } static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)) { } #endif /* CONFIG_KEXEC_CORE */ #endif /* ! __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_KEXEC_H */
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