mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 02:20:25 +00:00
112a575e49
Because calculate_relocation_address now uses the e820 map, it will be able to avoid addresses over 32 bits and regions that are at high addresses but not big enough for U-Boot. It also means we can remove the hack which limitted U-Boot's idea of the size of memory to less than 4GB. Also take into account the space needed for the heap and stack, so we avoid picking a very small region those areas might overlap with something it shouldn't. Signed-off-by: Gabe Black <gabeblack@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
143 lines
3.9 KiB
C
143 lines
3.9 KiB
C
/*
|
|
* 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;
|
|
}
|