mips/lib/reloc.c

1 // SPDX-License-Identifier: GPL-2.0+
7  * Relocation data, found in the .rel section, is generated by the mips-relocs
8  * tool & contains a record of all locations in the U-Boot binary that need to
15  * integer are found in the first byte - ie. it somewhat resembles little
19  * first integer represents the type of relocation as a standard ELF relocation
20  * type (ie. R_MIPS_*). The second integer represents the offset at which to
34  * read_uint() - Read an unsigned integer from the buffer
37  * Read one whole unsigned integer from the relocation data pointed to by @buf,
38  * advancing @buf past the bytes encoding the integer.
40  * Returns: the integer read from @buf
58  * apply_reloc() - Apply a single relocation
61  * @off: the relocation offset, ie. number of bytes we're moving U-Boot by
65  * relocated U-Boot - in particular, it does not check for overflows.
92 		panic("Unhandled reloc type %u\n", type);  in apply_reloc()
97  * relocate_code() - Relocate U-Boot, generally from flash to DDR
102  * Relocate U-Boot from its current location (generally in flash) to a new one
103  * (generally in DDR). This function will copy the U-Boot binary & apply
105  * U-Boot. As such, this function does not return.
118 	 * space in the U-Boot binary & complexity in handling them.  in relocate_code()
120 	off = relocaddr - (unsigned long)__text_start;  in relocate_code()
122 		panic("Mis-aligned relocation\n");  in relocate_code()
124 	/* Copy U-Boot to RAM */  in relocate_code()
125 	length = __image_copy_end - __text_start;  in relocate_code()
145 	bss_len = (unsigned long)&__bss_end - (unsigned long)__bss_start;  in relocate_code()
148 	/* Jump to the relocated U-Boot */  in relocate_code()
150 		       "move	$29, %0\n"  in relocate_code()
151 		"	move	$4, %1\n"  in relocate_code()
152 		"	move	$5, %2\n"  in relocate_code()
153 		"	move	$31, $0\n"  in relocate_code()
161 	/* Since we jumped to the new U-Boot above, we won't get here */  in relocate_code()