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https://github.com/brain-hackers/u-boot-brain
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![Wolfgang Denk](/assets/img/avatar_default.png)
By now, the majority of architectures have working relocation support, so the few remaining architectures have become exceptions. To make this more obvious, we make working relocation now the default case, and flag the remaining cases with CONFIG_NEEDS_MANUAL_RELOC. Signed-off-by: Wolfgang Denk <wd@denx.de> Tested-by: Heiko Schocher <hs@denx.de> Tested-by: Reinhard Meyer <u-boot@emk-elektronik.de>
348 lines
7.8 KiB
C
348 lines
7.8 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 <stdio_dev.h>
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#include <timestamp.h>
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#include <version.h>
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#include <net.h>
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#ifdef CONFIG_BITBANGMII
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#include <miiphy.h>
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#endif
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#include <asm/initcalls.h>
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#include <asm/sections.h>
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#include <asm/arch/mmu.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 " ("U_BOOT_DATE" - "U_BOOT_TIME") " CONFIG_IDENT_STRING;
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unsigned long monitor_flash_len;
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/* Weak aliases for optional board functions */
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static int __do_nothing(void)
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{
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return 0;
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}
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int board_postclk_init(void) __attribute__((weak, alias("__do_nothing")));
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int board_early_init_r(void) __attribute__((weak, alias("__do_nothing")));
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#ifdef CONFIG_SYS_DMA_ALLOC_LEN
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#include <asm/arch/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 = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
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dma_alloc_end = monitor_addr - CONFIG_SYS_MALLOC_LEN;
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dma_alloc_start = dma_alloc_end - CONFIG_SYS_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 + CONFIG_SYS_DCACHE_LINESZ - 1)
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& ~(CONFIG_SYS_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_f("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: %08lx -> %08lx data: %08lx -> %08lx\n",
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(unsigned long)_text, (unsigned long)_etext,
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(unsigned long)_data, (unsigned long)_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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board_postclk_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 = CONFIG_SYS_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 -= CONFIG_SYS_MALLOC_LEN;
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#ifdef CONFIG_SYS_DMA_ALLOC_LEN
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/* Reserve DMA memory (must be cache aligned) */
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addr &= ~(CONFIG_SYS_DCACHE_LINESZ - 1);
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addr -= CONFIG_SYS_DMA_ALLOC_LEN;
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#endif
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#ifdef CONFIG_LCD
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#ifdef CONFIG_FB_ADDR
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printf("LCD: Frame buffer allocated at preset 0x%08x\n",
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CONFIG_FB_ADDR);
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gd->fb_base = (void *)CONFIG_FB_ADDR;
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#else
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addr = lcd_setmem(addr);
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printf("LCD: Frame buffer allocated at 0x%08lx\n", addr);
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gd->fb_base = (void *)addr;
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#endif /* CONFIG_FB_ADDR */
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#endif /* CONFIG_LCD */
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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 = CONFIG_SYS_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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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 - CONFIG_SYS_MONITOR_BASE;
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/* Enable the MMU so that we can keep u-boot simple */
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mmu_init_r(dest_addr);
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board_early_init_r();
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monitor_flash_len = _edata - _text;
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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/*
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* We have to relocate the command table manually
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*/
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fixup_cmdtable(&__u_boot_cmd_start,
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(ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
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#endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
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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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/* The malloc area is right below the monitor image in RAM */
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mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
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CONFIG_SYS_MALLOC_LEN, CONFIG_SYS_MALLOC_LEN);
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malloc_bin_reloc();
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dma_alloc_init();
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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 CONFIG_SYS_NO_FLASH
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bd->bi_flashstart = CONFIG_SYS_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(CONFIG_SYS_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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stdio_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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#ifdef CONFIG_BITBANGMII
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bb_miiphy_init();
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#endif
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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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