1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2011 The Chromium OS Authors.
4 * (C) Copyright 2010,2011
5 * Graeme Russ, <graeme.russ@gmail.com>
6 */
7
8 #include <init.h>
9 #include <asm/e820.h>
10 #include <asm/cb_sysinfo.h>
11 #include <asm/global_data.h>
12
13 DECLARE_GLOBAL_DATA_PTR;
14
install_e820_map(unsigned int max_entries,struct e820_entry * entries)15 unsigned int install_e820_map(unsigned int max_entries,
16 struct e820_entry *entries)
17 {
18 return cb_install_e820_map(max_entries, entries);
19 }
20
21 /*
22 * This function looks for the highest region of memory lower than 4GB which
23 * has enough space for U-Boot where U-Boot is aligned on a page boundary. It
24 * overrides the default implementation found elsewhere which simply picks the
25 * end of ram, wherever that may be. The location of the stack, the relocation
26 * address, and how far U-Boot is moved by relocation are set in the global
27 * data structure.
28 */
board_get_usable_ram_top(phys_size_t total_size)29 phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
30 {
31 uintptr_t dest_addr = 0;
32 int i;
33
34 for (i = 0; i < lib_sysinfo.n_memranges; i++) {
35 struct memrange *memrange = &lib_sysinfo.memrange[i];
36 /* Force U-Boot to relocate to a page aligned address. */
37 uint64_t start = roundup(memrange->base, 1 << 12);
38 uint64_t end = memrange->base + memrange->size;
39
40 /* Ignore non-memory regions. */
41 if (memrange->type != CB_MEM_RAM)
42 continue;
43
44 /* Filter memory over 4GB. */
45 if (end > 0xffffffffULL)
46 end = 0x100000000ULL;
47 /* Skip this region if it's too small. */
48 if (end - start < total_size)
49 continue;
50
51 /* Use this address if it's the largest so far. */
52 if (end > dest_addr)
53 dest_addr = end;
54 }
55
56 /* If no suitable area was found, return an error. */
57 if (!dest_addr)
58 panic("No available memory found for relocation");
59
60 return (ulong)dest_addr;
61 }
62
dram_init(void)63 int dram_init(void)
64 {
65 int i;
66 phys_size_t ram_size = 0;
67
68 for (i = 0; i < lib_sysinfo.n_memranges; i++) {
69 struct memrange *memrange = &lib_sysinfo.memrange[i];
70 unsigned long long end = memrange->base + memrange->size;
71
72 if (memrange->type == CB_MEM_RAM && end > ram_size)
73 ram_size += memrange->size;
74 }
75
76 gd->ram_size = ram_size;
77 if (ram_size == 0)
78 return -1;
79
80 return 0;
81 }
82
dram_init_banksize(void)83 int dram_init_banksize(void)
84 {
85 int i, j;
86
87 if (CONFIG_NR_DRAM_BANKS) {
88 for (i = 0, j = 0; i < lib_sysinfo.n_memranges; i++) {
89 struct memrange *memrange = &lib_sysinfo.memrange[i];
90
91 if (memrange->type == CB_MEM_RAM) {
92 gd->bd->bi_dram[j].start = memrange->base;
93 gd->bd->bi_dram[j].size = memrange->size;
94 j++;
95 if (j >= CONFIG_NR_DRAM_BANKS)
96 break;
97 }
98 }
99 }
100
101 return 0;
102 }
103