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 <init.h>
10 #include <asm/e820.h>
11 #include <asm/arch/sysinfo.h>
12 #include <asm/global_data.h>
13
14 DECLARE_GLOBAL_DATA_PTR;
15
install_e820_map(unsigned int max_entries,struct e820_entry * entries)16 unsigned int install_e820_map(unsigned int max_entries,
17 struct e820_entry *entries)
18 {
19 unsigned int num_entries;
20 int i;
21
22 num_entries = min((unsigned int)lib_sysinfo.n_memranges, max_entries);
23 if (num_entries < lib_sysinfo.n_memranges) {
24 printf("Warning: Limiting e820 map to %d entries.\n",
25 num_entries);
26 }
27 for (i = 0; i < num_entries; i++) {
28 struct memrange *memrange = &lib_sysinfo.memrange[i];
29
30 entries[i].addr = memrange->base;
31 entries[i].size = memrange->size;
32
33 /*
34 * coreboot has some extensions (type 6 & 16) to the E820 types.
35 * When we detect this, mark it as E820_RESERVED.
36 */
37 if (memrange->type == CB_MEM_VENDOR_RSVD ||
38 memrange->type == CB_MEM_TABLE)
39 entries[i].type = E820_RESERVED;
40 else
41 entries[i].type = memrange->type;
42 }
43
44 return num_entries;
45 }
46
47 /*
48 * This function looks for the highest region of memory lower than 4GB which
49 * has enough space for U-Boot where U-Boot is aligned on a page boundary. It
50 * overrides the default implementation found elsewhere which simply picks the
51 * end of ram, wherever that may be. The location of the stack, the relocation
52 * address, and how far U-Boot is moved by relocation are set in the global
53 * data structure.
54 */
board_get_usable_ram_top(ulong total_size)55 ulong board_get_usable_ram_top(ulong total_size)
56 {
57 uintptr_t dest_addr = 0;
58 int i;
59
60 for (i = 0; i < lib_sysinfo.n_memranges; i++) {
61 struct memrange *memrange = &lib_sysinfo.memrange[i];
62 /* Force U-Boot to relocate to a page aligned address. */
63 uint64_t start = roundup(memrange->base, 1 << 12);
64 uint64_t end = memrange->base + memrange->size;
65
66 /* Ignore non-memory regions. */
67 if (memrange->type != CB_MEM_RAM)
68 continue;
69
70 /* Filter memory over 4GB. */
71 if (end > 0xffffffffULL)
72 end = 0x100000000ULL;
73 /* Skip this region if it's too small. */
74 if (end - start < total_size)
75 continue;
76
77 /* Use this address if it's the largest so far. */
78 if (end > dest_addr)
79 dest_addr = end;
80 }
81
82 /* If no suitable area was found, return an error. */
83 if (!dest_addr)
84 panic("No available memory found for relocation");
85
86 return (ulong)dest_addr;
87 }
88
dram_init(void)89 int dram_init(void)
90 {
91 int i;
92 phys_size_t ram_size = 0;
93
94 for (i = 0; i < lib_sysinfo.n_memranges; i++) {
95 struct memrange *memrange = &lib_sysinfo.memrange[i];
96 unsigned long long end = memrange->base + memrange->size;
97
98 if (memrange->type == CB_MEM_RAM && end > ram_size)
99 ram_size += memrange->size;
100 }
101
102 gd->ram_size = ram_size;
103 if (ram_size == 0)
104 return -1;
105
106 return 0;
107 }
108
dram_init_banksize(void)109 int dram_init_banksize(void)
110 {
111 int i, j;
112
113 if (CONFIG_NR_DRAM_BANKS) {
114 for (i = 0, j = 0; i < lib_sysinfo.n_memranges; i++) {
115 struct memrange *memrange = &lib_sysinfo.memrange[i];
116
117 if (memrange->type == CB_MEM_RAM) {
118 gd->bd->bi_dram[j].start = memrange->base;
119 gd->bd->bi_dram[j].size = memrange->size;
120 j++;
121 if (j >= CONFIG_NR_DRAM_BANKS)
122 break;
123 }
124 }
125 }
126
127 return 0;
128 }
129