u-boot/lib_avr32/board.c
Haavard Skinnemoen acac475212 AVR32: Enable interrupts at bootup
The timer code depends on the timer interrupt to keep track of the
upper 32 bits of the cycle counter. This obviously doesn't work when
interrupts are disabled the whole time.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-17 10:43:16 +01:00

354 lines
7.8 KiB
C

/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* 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 <command.h>
#include <malloc.h>
#include <devices.h>
#include <version.h>
#include <net.h>
#include <asm/initcalls.h>
#include <asm/sections.h>
#ifndef CONFIG_IDENT_STRING
#define CONFIG_IDENT_STRING ""
#endif
DECLARE_GLOBAL_DATA_PTR;
const char version_string[] =
U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ") " CONFIG_IDENT_STRING;
unsigned long monitor_flash_len;
/*
* Begin and end of memory area for malloc(), and current "brk"
*/
static unsigned long mem_malloc_start = 0;
static unsigned long mem_malloc_end = 0;
static unsigned long mem_malloc_brk = 0;
/* The malloc area is right below the monitor image in RAM */
static void mem_malloc_init(void)
{
unsigned long monitor_addr;
monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
mem_malloc_end = monitor_addr;
mem_malloc_start = mem_malloc_end - CFG_MALLOC_LEN;
mem_malloc_brk = mem_malloc_start;
printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
mem_malloc_start, mem_malloc_end);
memset ((void *)mem_malloc_start, 0,
mem_malloc_end - mem_malloc_start);
}
void *sbrk(ptrdiff_t increment)
{
unsigned long old = mem_malloc_brk;
unsigned long new = old + increment;
if ((new < mem_malloc_start) || (new > mem_malloc_end))
return NULL;
mem_malloc_brk = new;
return ((void *)old);
}
#ifdef CFG_DMA_ALLOC_LEN
#include <asm/cacheflush.h>
#include <asm/io.h>
static unsigned long dma_alloc_start;
static unsigned long dma_alloc_end;
static unsigned long dma_alloc_brk;
static void dma_alloc_init(void)
{
unsigned long monitor_addr;
monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
dma_alloc_end = monitor_addr - CFG_MALLOC_LEN;
dma_alloc_start = dma_alloc_end - CFG_DMA_ALLOC_LEN;
dma_alloc_brk = dma_alloc_start;
printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
dma_alloc_start, dma_alloc_end);
dcache_invalidate_range(cached(dma_alloc_start),
dma_alloc_end - dma_alloc_start);
}
void *dma_alloc_coherent(size_t len, unsigned long *handle)
{
unsigned long paddr = dma_alloc_brk;
if (dma_alloc_brk + len > dma_alloc_end)
return NULL;
dma_alloc_brk = ((paddr + len + CFG_DCACHE_LINESZ - 1)
& ~(CFG_DCACHE_LINESZ - 1));
*handle = paddr;
return uncached(paddr);
}
#else
static inline void dma_alloc_init(void)
{
}
#endif
static int init_baudrate(void)
{
char tmp[64];
int i;
i = getenv_r("baudrate", tmp, sizeof(tmp));
if (i > 0) {
gd->baudrate = simple_strtoul(tmp, NULL, 10);
} else {
gd->baudrate = CONFIG_BAUDRATE;
}
return 0;
}
static int display_banner (void)
{
printf ("\n\n%s\n\n", version_string);
printf ("U-Boot code: %p -> %p data: %p -> %p\n",
_text, _etext, _data, _end);
return 0;
}
void hang(void)
{
for (;;) ;
}
static int display_dram_config (void)
{
int i;
puts ("DRAM Configuration:\n");
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
print_size (gd->bd->bi_dram[i].size, "\n");
}
return 0;
}
static void display_flash_config (void)
{
puts ("Flash: ");
print_size(gd->bd->bi_flashsize, " ");
printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
}
void board_init_f(ulong board_type)
{
gd_t gd_data;
gd_t *new_gd;
bd_t *bd;
unsigned long *new_sp;
unsigned long monitor_len;
unsigned long monitor_addr;
unsigned long addr;
long sdram_size;
/* Initialize the global data pointer */
memset(&gd_data, 0, sizeof(gd_data));
gd = &gd_data;
/* Perform initialization sequence */
board_early_init_f();
cpu_init();
env_init();
init_baudrate();
serial_init();
console_init_f();
display_banner();
sdram_size = initdram(board_type);
/* If we have no SDRAM, we can't go on */
if (sdram_size <= 0)
panic("No working SDRAM available\n");
/*
* Now that we have DRAM mapped and working, we can
* relocate the code and continue running from DRAM.
*
* Reserve memory at end of RAM for (top down in that order):
* - u-boot image
* - heap for malloc()
* - board info struct
* - global data struct
* - stack
*/
addr = CFG_SDRAM_BASE + sdram_size;
monitor_len = _end - _text;
/*
* Reserve memory for u-boot code, data and bss.
* Round down to next 4 kB limit.
*/
addr -= monitor_len;
addr &= ~(4096UL - 1);
monitor_addr = addr;
/* Reserve memory for malloc() */
addr -= CFG_MALLOC_LEN;
#ifdef CFG_DMA_ALLOC_LEN
/* Reserve DMA memory (must be cache aligned) */
addr &= ~(CFG_DCACHE_LINESZ - 1);
addr -= CFG_DMA_ALLOC_LEN;
#endif
/* Allocate a Board Info struct on a word boundary */
addr -= sizeof(bd_t);
addr &= ~3UL;
gd->bd = bd = (bd_t *)addr;
/* Allocate a new global data copy on a 8-byte boundary. */
addr -= sizeof(gd_t);
addr &= ~7UL;
new_gd = (gd_t *)addr;
/* And finally, a new, bigger stack. */
new_sp = (unsigned long *)addr;
gd->stack_end = addr;
*(--new_sp) = 0;
*(--new_sp) = 0;
/*
* Initialize the board information struct with the
* information we have.
*/
bd->bi_dram[0].start = CFG_SDRAM_BASE;
bd->bi_dram[0].size = sdram_size;
bd->bi_baudrate = gd->baudrate;
memcpy(new_gd, gd, sizeof(gd_t));
relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
}
void board_init_r(gd_t *new_gd, ulong dest_addr)
{
extern void malloc_bin_reloc (void);
#ifndef CFG_ENV_IS_NOWHERE
extern char * env_name_spec;
#endif
cmd_tbl_t *cmdtp;
bd_t *bd;
gd = new_gd;
bd = gd->bd;
gd->flags |= GD_FLG_RELOC;
gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
monitor_flash_len = _edata - _text;
/*
* We have to relocate the command table manually
*/
for (cmdtp = &__u_boot_cmd_start;
cmdtp != &__u_boot_cmd_end; cmdtp++) {
unsigned long addr;
addr = (unsigned long)cmdtp->cmd + gd->reloc_off;
cmdtp->cmd = (typeof(cmdtp->cmd))addr;
addr = (unsigned long)cmdtp->name + gd->reloc_off;
cmdtp->name = (typeof(cmdtp->name))addr;
if (cmdtp->usage) {
addr = (unsigned long)cmdtp->usage + gd->reloc_off;
cmdtp->usage = (typeof(cmdtp->usage))addr;
}
#ifdef CFG_LONGHELP
if (cmdtp->help) {
addr = (unsigned long)cmdtp->help + gd->reloc_off;
cmdtp->help = (typeof(cmdtp->help))addr;
}
#endif
}
/* there are some other pointer constants we must deal with */
#ifndef CFG_ENV_IS_NOWHERE
env_name_spec += gd->reloc_off;
#endif
timer_init();
mem_malloc_init();
malloc_bin_reloc();
dma_alloc_init();
board_init_info();
enable_interrupts();
bd->bi_flashstart = 0;
bd->bi_flashsize = 0;
bd->bi_flashoffset = 0;
#ifndef CFG_NO_FLASH
bd->bi_flashstart = CFG_FLASH_BASE;
bd->bi_flashsize = flash_init();
bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
if (bd->bi_flashsize)
display_flash_config();
#endif
if (bd->bi_dram[0].size)
display_dram_config();
gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
if (!gd->bd->bi_boot_params)
puts("WARNING: Cannot allocate space for boot parameters\n");
/* initialize environment */
env_relocate();
devices_init();
jumptable_init();
console_init_r();
#if defined(CONFIG_CMD_NET)
#if defined(CONFIG_NET_MULTI)
puts("Net: ");
#endif
eth_initialize(gd->bd);
#endif
for (;;) {
main_loop();
}
}