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 <common.h>
9 #include <asm/e820.h>
10 #include <asm/arch/sysinfo.h>
11
12 DECLARE_GLOBAL_DATA_PTR;
13
install_e820_map(unsigned int max_entries,struct e820_entry * entries)14 unsigned int install_e820_map(unsigned int max_entries,
15 struct e820_entry *entries)
16 {
17 unsigned int num_entries;
18 int i;
19
20 num_entries = min((unsigned int)lib_sysinfo.n_memranges, max_entries);
21 if (num_entries < lib_sysinfo.n_memranges) {
22 printf("Warning: Limiting e820 map to %d entries.\n",
23 num_entries);
24 }
25 for (i = 0; i < num_entries; i++) {
26 struct memrange *memrange = &lib_sysinfo.memrange[i];
27
28 entries[i].addr = memrange->base;
29 entries[i].size = memrange->size;
30
31 /*
32 * coreboot has some extensions (type 6 & 16) to the E820 types.
33 * When we detect this, mark it as E820_RESERVED.
34 */
35 if (memrange->type == CB_MEM_VENDOR_RSVD ||
36 memrange->type == CB_MEM_TABLE)
37 entries[i].type = E820_RESERVED;
38 else
39 entries[i].type = memrange->type;
40 }
41
42 return num_entries;
43 }
44
45 /*
46 * This function looks for the highest region of memory lower than 4GB which
47 * has enough space for U-Boot where U-Boot is aligned on a page boundary. It
48 * overrides the default implementation found elsewhere which simply picks the
49 * end of ram, wherever that may be. The location of the stack, the relocation
50 * address, and how far U-Boot is moved by relocation are set in the global
51 * data structure.
52 */
board_get_usable_ram_top(ulong total_size)53 ulong board_get_usable_ram_top(ulong total_size)
54 {
55 uintptr_t dest_addr = 0;
56 int i;
57
58 for (i = 0; i < lib_sysinfo.n_memranges; i++) {
59 struct memrange *memrange = &lib_sysinfo.memrange[i];
60 /* Force U-Boot to relocate to a page aligned address. */
61 uint64_t start = roundup(memrange->base, 1 << 12);
62 uint64_t end = memrange->base + memrange->size;
63
64 /* Ignore non-memory regions. */
65 if (memrange->type != CB_MEM_RAM)
66 continue;
67
68 /* Filter memory over 4GB. */
69 if (end > 0xffffffffULL)
70 end = 0x100000000ULL;
71 /* Skip this region if it's too small. */
72 if (end - start < total_size)
73 continue;
74
75 /* Use this address if it's the largest so far. */
76 if (end > dest_addr)
77 dest_addr = end;
78 }
79
80 /* If no suitable area was found, return an error. */
81 if (!dest_addr)
82 panic("No available memory found for relocation");
83
84 return (ulong)dest_addr;
85 }
86
dram_init(void)87 int dram_init(void)
88 {
89 int i;
90 phys_size_t ram_size = 0;
91
92 for (i = 0; i < lib_sysinfo.n_memranges; i++) {
93 struct memrange *memrange = &lib_sysinfo.memrange[i];
94 unsigned long long end = memrange->base + memrange->size;
95
96 if (memrange->type == CB_MEM_RAM && end > ram_size)
97 ram_size += memrange->size;
98 }
99
100 gd->ram_size = ram_size;
101 if (ram_size == 0)
102 return -1;
103
104 return 0;
105 }
106
dram_init_banksize(void)107 int dram_init_banksize(void)
108 {
109 int i, j;
110
111 if (CONFIG_NR_DRAM_BANKS) {
112 for (i = 0, j = 0; i < lib_sysinfo.n_memranges; i++) {
113 struct memrange *memrange = &lib_sysinfo.memrange[i];
114
115 if (memrange->type == CB_MEM_RAM) {
116 gd->bd->bi_dram[j].start = memrange->base;
117 gd->bd->bi_dram[j].size = memrange->size;
118 j++;
119 if (j >= CONFIG_NR_DRAM_BANKS)
120 break;
121 }
122 }
123 }
124
125 return 0;
126 }
127