forked from mirrors/linux
b2473a3597
__pa() is only intended to be used for linear map addresses and using
it for initial_boot_params which is in fixmap for arm64 will give an
incorrect value. Hence save the physical address when it is known at
boot time when calling early_init_dt_scan for arm64 and use it at kexec
time instead of converting the virtual address using __pa().
Note that arm64 doesn't need the FDT region reserved in the DT as the
kernel explicitly reserves the passed in FDT. Therefore, only a debug
warning is fixed with this change.
Reported-by: Breno Leitao <leitao@debian.org>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Usama Arif <usamaarif642@gmail.com>
Fixes: ac10be5cdb ("arm64: Use common of_kexec_alloc_and_setup_fdt()")
Link: https://lore.kernel.org/r/20241023171426.452688-1-usamaarif642@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
98 lines
3.5 KiB
C
98 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Definitions for working with the Flattened Device Tree data format
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*
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* Copyright 2009 Benjamin Herrenschmidt, IBM Corp
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* benh@kernel.crashing.org
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*/
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#ifndef _LINUX_OF_FDT_H
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#define _LINUX_OF_FDT_H
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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/* Definitions used by the flattened device tree */
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#define OF_DT_HEADER 0xd00dfeed /* marker */
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#ifndef __ASSEMBLY__
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#if defined(CONFIG_OF_FLATTREE)
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struct device_node;
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/* For scanning an arbitrary device-tree at any time */
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extern void *of_fdt_unflatten_tree(const unsigned long *blob,
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struct device_node *dad,
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struct device_node **mynodes);
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/* TBD: Temporary export of fdt globals - remove when code fully merged */
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extern int __initdata dt_root_addr_cells;
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extern int __initdata dt_root_size_cells;
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extern void *initial_boot_params;
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extern phys_addr_t initial_boot_params_pa;
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extern char __dtb_start[];
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extern char __dtb_end[];
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/* Other Prototypes */
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extern u64 of_flat_dt_translate_address(unsigned long node);
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extern void of_fdt_limit_memory(int limit);
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#endif /* CONFIG_OF_FLATTREE */
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#ifdef CONFIG_OF_EARLY_FLATTREE
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/* For scanning the flat device-tree at boot time */
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extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
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int depth, void *data),
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void *data);
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extern int of_scan_flat_dt_subnodes(unsigned long node,
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int (*it)(unsigned long node,
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const char *uname,
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void *data),
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void *data);
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extern int of_get_flat_dt_subnode_by_name(unsigned long node,
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const char *uname);
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extern const void *of_get_flat_dt_prop(unsigned long node, const char *name,
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int *size);
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extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
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extern unsigned long of_get_flat_dt_root(void);
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extern uint32_t of_get_flat_dt_phandle(unsigned long node);
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extern int early_init_dt_scan_chosen(char *cmdline);
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extern int early_init_dt_scan_memory(void);
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extern void early_init_dt_check_for_usable_mem_range(void);
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extern int early_init_dt_scan_chosen_stdout(void);
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extern void early_init_fdt_scan_reserved_mem(void);
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extern void early_init_fdt_reserve_self(void);
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extern void early_init_dt_add_memory_arch(u64 base, u64 size);
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extern u64 dt_mem_next_cell(int s, const __be32 **cellp);
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/* Early flat tree scan hooks */
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extern int early_init_dt_scan_root(void);
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extern bool early_init_dt_scan(void *dt_virt, phys_addr_t dt_phys);
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extern bool early_init_dt_verify(void *dt_virt, phys_addr_t dt_phys);
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extern void early_init_dt_scan_nodes(void);
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extern const char *of_flat_dt_get_machine_name(void);
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extern const void *of_flat_dt_match_machine(const void *default_match,
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const void * (*get_next_compat)(const char * const**));
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/* Other Prototypes */
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extern void unflatten_device_tree(void);
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extern void unflatten_and_copy_device_tree(void);
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extern void early_init_devtree(void *);
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extern void early_get_first_memblock_info(void *, phys_addr_t *);
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#else /* CONFIG_OF_EARLY_FLATTREE */
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static inline void early_init_dt_check_for_usable_mem_range(void) {}
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static inline int early_init_dt_scan_chosen_stdout(void) { return -ENODEV; }
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static inline void early_init_fdt_scan_reserved_mem(void) {}
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static inline void early_init_fdt_reserve_self(void) {}
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static inline const char *of_flat_dt_get_machine_name(void) { return NULL; }
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static inline void unflatten_device_tree(void) {}
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static inline void unflatten_and_copy_device_tree(void) {}
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#endif /* CONFIG_OF_EARLY_FLATTREE */
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#endif /* __ASSEMBLY__ */
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#endif /* _LINUX_OF_FDT_H */
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