364 lines
8 KiB
C
364 lines
8 KiB
C
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include <devices.h>
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#include <version.h>
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#include <net.h>
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#include <asm/initcalls.h>
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#include <asm/sections.h>
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#ifndef CONFIG_IDENT_STRING
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#define CONFIG_IDENT_STRING ""
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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const char version_string[] =
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U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ") " CONFIG_IDENT_STRING;
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unsigned long monitor_flash_len;
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/*
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* Begin and end of memory area for malloc(), and current "brk"
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*/
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static unsigned long mem_malloc_start = 0;
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static unsigned long mem_malloc_end = 0;
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static unsigned long mem_malloc_brk = 0;
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/* The malloc area is right below the monitor image in RAM */
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static void mem_malloc_init(void)
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{
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unsigned long monitor_addr;
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monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
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mem_malloc_end = monitor_addr;
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mem_malloc_start = mem_malloc_end - CFG_MALLOC_LEN;
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mem_malloc_brk = mem_malloc_start;
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printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
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mem_malloc_start, mem_malloc_end);
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memset ((void *)mem_malloc_start, 0,
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mem_malloc_end - mem_malloc_start);
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}
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void *sbrk(ptrdiff_t increment)
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{
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unsigned long old = mem_malloc_brk;
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unsigned long new = old + increment;
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if ((new < mem_malloc_start) || (new > mem_malloc_end))
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return NULL;
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mem_malloc_brk = new;
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return ((void *)old);
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}
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#ifdef CFG_DMA_ALLOC_LEN
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#include <asm/cacheflush.h>
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#include <asm/io.h>
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static unsigned long dma_alloc_start;
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static unsigned long dma_alloc_end;
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static unsigned long dma_alloc_brk;
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static void dma_alloc_init(void)
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{
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unsigned long monitor_addr;
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monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
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dma_alloc_end = monitor_addr - CFG_MALLOC_LEN;
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dma_alloc_start = dma_alloc_end - CFG_DMA_ALLOC_LEN;
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dma_alloc_brk = dma_alloc_start;
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printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
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dma_alloc_start, dma_alloc_end);
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dcache_invalidate_range(cached(dma_alloc_start),
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dma_alloc_end - dma_alloc_start);
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}
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void *dma_alloc_coherent(size_t len, unsigned long *handle)
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{
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unsigned long paddr = dma_alloc_brk;
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if (dma_alloc_brk + len > dma_alloc_end)
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return NULL;
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dma_alloc_brk = ((paddr + len + CFG_DCACHE_LINESZ - 1)
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& ~(CFG_DCACHE_LINESZ - 1));
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*handle = paddr;
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return uncached(paddr);
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}
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#else
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static inline void dma_alloc_init(void)
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{
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}
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#endif
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static int init_baudrate(void)
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{
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char tmp[64];
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int i;
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i = getenv_r("baudrate", tmp, sizeof(tmp));
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if (i > 0) {
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gd->baudrate = simple_strtoul(tmp, NULL, 10);
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} else {
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gd->baudrate = CONFIG_BAUDRATE;
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}
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return 0;
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}
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static int display_banner (void)
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{
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printf ("\n\n%s\n\n", version_string);
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printf ("U-Boot code: %p -> %p data: %p -> %p\n",
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_text, _etext, _data, _end);
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return 0;
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}
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void hang(void)
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{
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for (;;) ;
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}
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static int display_dram_config (void)
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{
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int i;
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puts ("DRAM Configuration:\n");
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for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
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printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
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print_size (gd->bd->bi_dram[i].size, "\n");
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}
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return 0;
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}
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static void display_flash_config (void)
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{
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puts ("Flash: ");
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print_size(gd->bd->bi_flashsize, " ");
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printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
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}
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void board_init_f(ulong board_type)
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{
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gd_t gd_data;
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gd_t *new_gd;
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bd_t *bd;
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unsigned long *new_sp;
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unsigned long monitor_len;
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unsigned long monitor_addr;
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unsigned long addr;
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long sdram_size;
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/* Initialize the global data pointer */
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memset(&gd_data, 0, sizeof(gd_data));
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gd = &gd_data;
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/* Perform initialization sequence */
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board_early_init_f();
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cpu_init();
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env_init();
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init_baudrate();
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serial_init();
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console_init_f();
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display_banner();
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sdram_size = initdram(board_type);
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/* If we have no SDRAM, we can't go on */
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if (sdram_size <= 0)
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panic("No working SDRAM available\n");
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/*
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* Now that we have DRAM mapped and working, we can
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* relocate the code and continue running from DRAM.
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*
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* Reserve memory at end of RAM for (top down in that order):
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* - u-boot image
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* - heap for malloc()
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* - board info struct
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* - global data struct
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* - stack
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*/
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addr = CFG_SDRAM_BASE + sdram_size;
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monitor_len = _end - _text;
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/*
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* Reserve memory for u-boot code, data and bss.
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* Round down to next 4 kB limit.
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*/
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addr -= monitor_len;
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addr &= ~(4096UL - 1);
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monitor_addr = addr;
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/* Reserve memory for malloc() */
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addr -= CFG_MALLOC_LEN;
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#ifdef CFG_DMA_ALLOC_LEN
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/* Reserve DMA memory (must be cache aligned) */
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addr &= ~(CFG_DCACHE_LINESZ - 1);
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addr -= CFG_DMA_ALLOC_LEN;
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#endif
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/* Allocate a Board Info struct on a word boundary */
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addr -= sizeof(bd_t);
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addr &= ~3UL;
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gd->bd = bd = (bd_t *)addr;
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/* Allocate a new global data copy on a 8-byte boundary. */
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addr -= sizeof(gd_t);
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addr &= ~7UL;
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new_gd = (gd_t *)addr;
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/* And finally, a new, bigger stack. */
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new_sp = (unsigned long *)addr;
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gd->stack_end = addr;
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*(--new_sp) = 0;
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*(--new_sp) = 0;
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/*
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* Initialize the board information struct with the
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* information we have.
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*/
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bd->bi_dram[0].start = CFG_SDRAM_BASE;
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bd->bi_dram[0].size = sdram_size;
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bd->bi_baudrate = gd->baudrate;
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memcpy(new_gd, gd, sizeof(gd_t));
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relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
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}
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void board_init_r(gd_t *new_gd, ulong dest_addr)
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{
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extern void malloc_bin_reloc (void);
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#ifndef CONFIG_ENV_IS_NOWHERE
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extern char * env_name_spec;
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#endif
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char *s;
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cmd_tbl_t *cmdtp;
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bd_t *bd;
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gd = new_gd;
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bd = gd->bd;
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gd->flags |= GD_FLG_RELOC;
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gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
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monitor_flash_len = _edata - _text;
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/*
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* We have to relocate the command table manually
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*/
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for (cmdtp = &__u_boot_cmd_start;
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cmdtp != &__u_boot_cmd_end; cmdtp++) {
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unsigned long addr;
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addr = (unsigned long)cmdtp->cmd + gd->reloc_off;
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cmdtp->cmd = (typeof(cmdtp->cmd))addr;
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addr = (unsigned long)cmdtp->name + gd->reloc_off;
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cmdtp->name = (typeof(cmdtp->name))addr;
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if (cmdtp->usage) {
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addr = (unsigned long)cmdtp->usage + gd->reloc_off;
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cmdtp->usage = (typeof(cmdtp->usage))addr;
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}
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#ifdef CFG_LONGHELP
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if (cmdtp->help) {
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addr = (unsigned long)cmdtp->help + gd->reloc_off;
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cmdtp->help = (typeof(cmdtp->help))addr;
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}
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#endif
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}
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/* there are some other pointer constants we must deal with */
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#ifndef CONFIG_ENV_IS_NOWHERE
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env_name_spec += gd->reloc_off;
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#endif
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timer_init();
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mem_malloc_init();
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malloc_bin_reloc();
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dma_alloc_init();
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board_init_info();
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enable_interrupts();
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bd->bi_flashstart = 0;
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bd->bi_flashsize = 0;
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bd->bi_flashoffset = 0;
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#ifndef CFG_NO_FLASH
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bd->bi_flashstart = CFG_FLASH_BASE;
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bd->bi_flashsize = flash_init();
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bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
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if (bd->bi_flashsize)
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display_flash_config();
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#endif
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if (bd->bi_dram[0].size)
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display_dram_config();
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gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
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if (!gd->bd->bi_boot_params)
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puts("WARNING: Cannot allocate space for boot parameters\n");
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/* initialize environment */
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env_relocate();
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bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
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devices_init();
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jumptable_init();
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console_init_r();
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s = getenv("loadaddr");
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if (s)
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load_addr = simple_strtoul(s, NULL, 16);
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#if defined(CONFIG_CMD_NET)
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s = getenv("bootfile");
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if (s)
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copy_filename(BootFile, s, sizeof(BootFile));
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#if defined(CONFIG_NET_MULTI)
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puts("Net: ");
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#endif
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eth_initialize(gd->bd);
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#endif
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for (;;) {
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main_loop();
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}
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}
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