This patch adds SPL booting support (NOR flash) for the PPC4xx platforms. This SPL booting (Falcon mode) will be used by the upcoming lcd4_lwmon5 board port (lwmon5 variant). Signed-off-by: Stefan Roese <sr@denx.de>master
Stefan Roese
12 years ago
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d10f68ae47
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/*
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* Copyright (C) 2013 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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* Return selected boot device. On PPC4xx 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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/*
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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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* 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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* 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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@ -0,0 +1,74 @@ |
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/* |
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* Copyright 2012-2013 Stefan Roese <sr@denx.de> |
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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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MEMORY |
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{ |
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sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, |
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LENGTH = CONFIG_SPL_BSS_MAX_SIZE |
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flash : ORIGIN = CONFIG_SPL_TEXT_BASE, |
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LENGTH = CONFIG_SYS_SPL_MAX_LEN |
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} |
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OUTPUT_ARCH(powerpc) |
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ENTRY(_start) |
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SECTIONS |
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{ |
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#ifdef CONFIG_440 |
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.bootpg 0xfffff000 : |
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{ |
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arch/powerpc/cpu/ppc4xx/start.o (.bootpg) |
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/* |
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* PPC440 board need a board specific object with the |
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* TLB definitions. This needs to get included right after |
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* start.o, since the first shadow TLB only covers 4k |
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* of address space. |
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*/ |
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CONFIG_BOARDDIR/init.o (.bootpg) |
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} > flash |
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#endif |
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.resetvec 0xFFFFFFFC : |
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{ |
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KEEP(*(.resetvec)) |
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} > flash |
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.text : |
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{ |
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__start = .; |
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arch/powerpc/cpu/ppc4xx/start.o (.text) |
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CONFIG_BOARDDIR/init.o (.text) |
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*(.text*) |
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} > flash |
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. = ALIGN(4); |
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.data : { *(SORT_BY_ALIGNMENT(.data*)) } > flash |
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. = ALIGN(4); |
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.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } > flash |
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.bss : |
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{ |
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. = ALIGN(4); |
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__bss_start = .; |
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*(.bss*) |
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. = ALIGN(4); |
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__bss_end = .; |
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} > sdram |
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} |
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