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/*
* Copyright (c) 2011 The Chromium OS Authors.
* (C) Copyright 2010,2011
* Graeme Russ, <graeme.russ@gmail.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but without any warranty; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <malloc.h>
#include <asm/e820.h>
#include <asm/u-boot-x86.h>
#include <asm/global_data.h>
#include <asm/processor.h>
#include <asm/arch/sysinfo.h>
#include <asm/arch/tables.h>
DECLARE_GLOBAL_DATA_PTR;
unsigned install_e820_map(unsigned max_entries, struct e820entry *entries)
{
int i;
unsigned num_entries = min(lib_sysinfo.n_memranges, max_entries);
if (num_entries < lib_sysinfo.n_memranges) {
printf("Warning: Limiting e820 map to %d entries.\n",
num_entries);
}
for (i = 0; i < num_entries; i++) {
struct memrange *memrange = &lib_sysinfo.memrange[i];
entries[i].addr = memrange->base;
entries[i].size = memrange->size;
entries[i].type = memrange->type;
}
return num_entries;
}
/*
* This function looks for the highest region of memory lower than 4GB which
* has enough space for U-Boot where U-Boot is aligned on a page boundary. It
* overrides the default implementation found elsewhere which simply picks the
* end of ram, wherever that may be. The location of the stack, the relocation
* address, and how far U-Boot is moved by relocation are set in the global
* data structure.
*/
int calculate_relocation_address(void)
{
const uint64_t uboot_size = (uintptr_t)&__bss_end -
(uintptr_t)&__text_start;
const uint64_t total_size = uboot_size + CONFIG_SYS_MALLOC_LEN +
CONFIG_SYS_STACK_SIZE;
uintptr_t dest_addr = 0;
int i;
for (i = 0; i < lib_sysinfo.n_memranges; i++) {
struct memrange *memrange = &lib_sysinfo.memrange[i];
/* Force U-Boot to relocate to a page aligned address. */
uint64_t start = roundup(memrange->base, 1 << 12);
uint64_t end = memrange->base + memrange->size;
/* Ignore non-memory regions. */
if (memrange->type != CB_MEM_RAM)
continue;
/* Filter memory over 4GB. */
if (end > 0xffffffffULL)
end = 0x100000000ULL;
/* Skip this region if it's too small. */
if (end - start < total_size)
continue;
/* Use this address if it's the largest so far. */
if (end - uboot_size > dest_addr)
dest_addr = end;
}
/* If no suitable area was found, return an error. */
if (!dest_addr)
return 1;
dest_addr -= uboot_size;
dest_addr &= ~((1 << 12) - 1);
gd->relocaddr = dest_addr;
gd->reloc_off = dest_addr - (uintptr_t)&__text_start;
gd->start_addr_sp = dest_addr - CONFIG_SYS_MALLOC_LEN;
return 0;
}
int dram_init_f(void)
{
int i;
phys_size_t ram_size = 0;
for (i = 0; i < lib_sysinfo.n_memranges; i++) {
struct memrange *memrange = &lib_sysinfo.memrange[i];
unsigned long long end = memrange->base + memrange->size;
if (memrange->type == CB_MEM_RAM && end > ram_size)
ram_size = end;
}
gd->ram_size = ram_size;
if (ram_size == 0)
return -1;
return 0;
}
int dram_init(void)
{
int i, j;
if (CONFIG_NR_DRAM_BANKS) {
for (i = 0, j = 0; i < lib_sysinfo.n_memranges; i++) {
struct memrange *memrange = &lib_sysinfo.memrange[i];
if (memrange->type == CB_MEM_RAM) {
gd->bd->bi_dram[j].start = memrange->base;
gd->bd->bi_dram[j].size = memrange->size;
j++;
if (j >= CONFIG_NR_DRAM_BANKS)
break;
}
}
}
return 0;
}
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