#include <stddef.h>
#include <stdint.h>
#include <device_tree.h>
#include <list.h>
#include <program_loading.h>

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Data Structures
struct	fit_image_node

struct	fit_config_node

struct	fit_overlay_chain

Functions
void	fit_update_chosen (struct device_tree tree, const char cmd_line)

void	fit_add_compat_string (const char *str)

void	fit_update_memory (struct device_tree *tree)

bool	fit_payload_arch (struct prog payload, struct fit_config_node config, struct region kernel, struct region fdt, struct region *initrd)

struct fit_config_node *	fit_load (void *fit)

void	fit_add_ramdisk (struct device_tree tree, void ramdisk_addr, size_t ramdisk_size)

Function Documentation

◆ fit_add_compat_string()

void fit_add_compat_string ( const char * str )

Definition at line 322 of file fit.c.

References clean_compat_string(), compat_string_entry::compat_string, compat_strings, list_insert_after(), compat_string_entry::list_node, strdup(), and xzalloc.

Referenced by fit_add_default_compat_strings().

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◆ fit_add_ramdisk()

void fit_add_ramdisk	(	struct device_tree *	tree,
		void *	ramdisk_addr,
		size_t	ramdisk_size
	)

Definition at line 222 of file fit.c.

References dt_add_u64_prop(), dt_find_node(), NULL, and device_tree::root.

Referenced by fit_payload().

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◆ fit_load()

struct fit_config_node* fit_load ( void * fit )

Definition at line 455 of file fit.c.

References BIOS_DEBUG, BIOS_ERR, BIOS_INFO, BIOS_WARNING, fit_config_node::compat_rank, fit_config_node::compat_string, compat_string_entry::compat_string, compat_strings, config, config_nodes, fdt_unflatten(), fit_add_default_compat_strings(), fit_unpack(), fit_update_compat(), image_nodes, list_for_each, fit_image_node::name, fit_config_node::name, NULL, fit_overlay_chain::overlay, printk, fit_image_node::size, strcmp(), and strlen().

Referenced by fit_payload().

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◆ fit_payload_arch()

bool fit_payload_arch	(	struct prog *	payload,
		struct fit_config_node *	config,
		struct region *	kernel,
		struct region *	fdt,
		struct region *	initrd
	)

The kernel ARM documentation recommends loading the kernel above 32MiB in order to avoid the need to need to relocate prior to decompression.

The code assumes that bootmem_walk provides a sorted list of memory regions, starting from the lowest address. The order of the calls here doesn't matter, as the placement is enforced in the called functions. For details check code on top.

To ensure the fdt is not overwritten by the kernel decompressor, place the fdt above the 128 MB from the start of RAM, as recommended by the kernel documentation.

The code assumes that bootmem_walk provides a sorted list of memory regions, starting from the lowest address. The order of the calls here doesn't matter, as the placement is enforced in the called functions. For details check code on top.

NOTE: versions prior to v4.6 cannot make use of memory below the physical offset of the Image so it is recommended that the Image be placed as close as possible to the start of system RAM.

For kernel <v4.6 the INITRD and FDT can't be placed below the kernel. In that case set region offset to an address on top of kernel.

Definition at line 30 of file fit_payload.c.

References _dram, arg, BIOS_CRIT, BIOS_DEBUG, BM_MEM_PAYLOAD, bootmem_add_range(), bootmem_dump_ranges(), bootmem_walk(), config, decompress_kernel_header(), fit_place_kernel(), fit_place_mem(), get_kernel_size(), MiB, NULL, region::offset, printk, prog_set_entry(), scratch, and region::size.