common/init/board_init.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * Code shared between SPL and U-Boot proper
22  * Allocate reserved space for use as 'globals' from 'top' address and
35  * - GD is aligned down on a 16-byte boundary
37  *  - the early malloc arena is not aligned, therefore it follows the stack
40  *  - GD is allocated last, so that the return value of this functions is
45 ulong board_init_f_alloc_reserve(ulong top)  in board_init_f_alloc_reserve()  argument
49 	top -= CONFIG_VAL(SYS_MALLOC_F_LEN);  in board_init_f_alloc_reserve()
52 	top = rounddown(top-sizeof(struct global_data), 16);  in board_init_f_alloc_reserve()
54 	return top;  in board_init_f_alloc_reserve()
64  * to base+size-1 (where 'size' is the value returned by the allocation
71  * the caller will set gd to the lowest reserved location. Therefore, in
80  * - through gd_ptr if before the call to arch_setup_gd();
82  * - through gd once arch_setup_gd() has been called.
84  * Do not use 'gd->' until arch_setup_gd() has been called!
104 	 * clear GD entirely and set it up.  in board_init_f_init_reserve()
105 	 * Use gd_ptr, as gd may not be properly set yet.  in board_init_f_init_reserve()
111 	/* set GD unless architecture did it already */  in board_init_f_init_reserve()
115 	/* next alloc will be higher by one GD plus 16-byte alignment */  in board_init_f_init_reserve()
120 	 * Use gd as it is now properly set for all architectures.  in board_init_f_init_reserve()
125 	gd->malloc_base = base;  in board_init_f_init_reserve()
132  * Board-specific Platform code can reimplement show_boot_progress () if needed