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Commit 0063fded authored by Marcin Nowakowski's avatar Marcin Nowakowski Committed by Ralf Baechle
Browse files

MIPS: platform: Allow for DTB to be moved during kernel relocation 



Add plat_fdt_relocated(void*) API to allow the kernel relocation code to
update platform's information about the DTB location if the DTB had to
be moved due to being placed in a location used by the relocated kernel.

Signed-off-by: default avatarMarcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14611/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 73346081

arch/mips/generic/init.c

+13 −0
Original line number Diff line number Diff line
@@ -88,6 +88,19 @@ void __init *plat_get_fdt(void) 
	return (void *)fdt;

}



void __init plat_fdt_relocated(void *new_location)

{

	/*

	 * reset fdt as the cached value would point to the location

	 * before relocations happened and update the location argument

	 * if it was passed using UHI

	 */

	fdt = NULL;



	if (fw_arg0 == -2)

		fw_arg1 = (unsigned long)new_location;

}



void __init plat_mem_setup(void)

{

	if (mach && mach->fixup_fdt)

arch/mips/include/asm/bootinfo.h

+13 −0
Original line number Diff line number Diff line
@@ -164,6 +164,19 @@ static inline void plat_swiotlb_setup(void) {} 
 * Return: Pointer to the flattened device tree blob.

 */

extern void *plat_get_fdt(void);



#ifdef CONFIG_RELOCATABLE



/**

 * plat_fdt_relocated() - Update platform's information about relocated dtb

 *

 * This function provides a platform-independent API to set platform's

 * information about relocated DTB if it needs to be moved due to kernel

 * relocation occurring at boot.

 */

void plat_fdt_relocated(void *new_location);



#endif /* CONFIG_RELOCATABLE */

#endif /* CONFIG_USE_OF */



#endif /* _ASM_BOOTINFO_H */