xref: /openbmc/u-boot/arch/x86/lib/init_helpers.c (revision b5493d17)
1 /*
2  * (C) Copyright 2011
3  * Graeme Russ, <graeme.russ@gmail.com>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 #include <common.h>
8 #include <fdtdec.h>
9 #include <spi.h>
10 #include <asm/mtrr.h>
11 #include <asm/sections.h>
12 
13 DECLARE_GLOBAL_DATA_PTR;
14 
15 /* Get the top of usable RAM */
16 __weak ulong board_get_usable_ram_top(ulong total_size)
17 {
18 	return gd->ram_size;
19 }
20 
21 int calculate_relocation_address(void)
22 {
23 	const ulong uboot_size = (uintptr_t)&__bss_end -
24 			(uintptr_t)&__text_start;
25 	ulong total_size;
26 	ulong dest_addr;
27 	ulong fdt_size = 0;
28 
29 #if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL)
30 	if (gd->fdt_blob)
31 		fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
32 #endif
33 	total_size = ALIGN(uboot_size, 1 << 12) + CONFIG_SYS_MALLOC_LEN +
34 		CONFIG_SYS_STACK_SIZE + fdt_size;
35 
36 	dest_addr = board_get_usable_ram_top(total_size);
37 	/*
38 	 * NOTE: All destination address are rounded down to 16-byte
39 	 *       boundary to satisfy various worst-case alignment
40 	 *       requirements
41 	 */
42 	dest_addr &= ~15;
43 
44 #if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL)
45 	/*
46 	 * If the device tree is sitting immediate above our image then we
47 	 * must relocate it. If it is embedded in the data section, then it
48 	 * will be relocated with other data.
49 	 */
50 	if (gd->fdt_blob) {
51 		dest_addr -= fdt_size;
52 		gd->new_fdt = (void *)dest_addr;
53 		dest_addr &= ~15;
54 	}
55 #endif
56 	/* U-Boot is below the FDT */
57 	dest_addr -= uboot_size;
58 	dest_addr &= ~((1 << 12) - 1);
59 	gd->relocaddr = dest_addr;
60 	gd->reloc_off = dest_addr - (uintptr_t)&__text_start;
61 
62 	/* Stack is at the bottom, so it can grow down */
63 	gd->start_addr_sp = dest_addr - CONFIG_SYS_MALLOC_LEN;
64 
65 	return 0;
66 }
67 
68 int init_cache_f_r(void)
69 {
70 #if defined(CONFIG_X86_RESET_VECTOR) & !defined(CONFIG_HAVE_FSP)
71 	int ret;
72 
73 	ret = mtrr_commit(false);
74 	if (ret)
75 		return ret;
76 #endif
77 	/* Initialise the CPU cache(s) */
78 	return init_cache();
79 }
80 
81 bd_t bd_data;
82 
83 int init_bd_struct_r(void)
84 {
85 	gd->bd = &bd_data;
86 	memset(gd->bd, 0, sizeof(bd_t));
87 
88 	return 0;
89 }
90 
91 int init_func_spi(void)
92 {
93 	puts("SPI:   ");
94 	spi_init();
95 	puts("ready\n");
96 	return 0;
97 }
98