mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 11:18:28 +00:00
3929fb0a14
Note this is a tree-wide change affecting multiple architectures. At present we use __bss_start, but mostly __bss_end__. This seems inconsistent and in a number of places __bss_end is used instead. Change to use __bss_end for the BSS end symbol throughout U-Boot. This makes it possible to use the asm-generic/sections.h file on all archs. Signed-off-by: Simon Glass <sjg@chromium.org>
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/*
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* Copyright (C) 2012 Stefan Roese <sr@denx.de>
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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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#include <common.h>
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#include <spl.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Needed to align size SPL image to a 4-byte length
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*/
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u32 end_align __attribute__ ((section(".end_align")));
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/*
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* Return selected boot device. On MPC5200 its only NOR flash right now.
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*/
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u32 spl_boot_device(void)
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{
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return BOOT_DEVICE_NOR;
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}
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/*
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* SPL version of board_init_f()
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*/
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void board_init_f(ulong bootflag)
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{
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end_align = (u32)__spl_flash_end;
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/*
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* On MPC5200, the initial RAM (and gd) is located in the internal
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* SRAM. So we can actually call the preloader console init code
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* before calling initdram(). This makes serial output (printf)
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* available very early, even before SDRAM init, which has been
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* an U-Boot priciple from day 1.
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*/
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/*
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* Init global_data pointer. Has to be done before calling
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* get_clocks(), as it stores some clock values into gd needed
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* later on in the serial driver.
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*/
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/* Pointer is writable since we allocated a register for it */
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gd = (gd_t *)(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
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/* Clear initial global data */
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memset((void *)gd, 0, sizeof(gd_t));
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/*
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* get_clocks() needs to be called so that the serial driver
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* works correctly
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*/
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get_clocks();
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/*
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* Do rudimental console / serial setup
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*/
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preloader_console_init();
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/*
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* First we need to initialize the SDRAM, so that the real
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* U-Boot or the OS (Linux) can be loaded
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*/
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initdram(0);
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/* Clear bss */
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memset(__bss_start, '\0', __bss_end - __bss_start);
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/*
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* Call board_init_r() (SPL framework version) to load and boot
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* real U-Boot or OS
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*/
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board_init_r(NULL, 0);
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/* Does not return!!! */
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}
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