From 98f99e9f16462fa07ad0b0cd0c7c0d2623a6da87 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Tue, 2 Apr 2013 10:37:04 +0200 Subject: ppc4xx: Add SPL support 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 --- arch/powerpc/cpu/ppc4xx/spl_boot.c | 72 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 arch/powerpc/cpu/ppc4xx/spl_boot.c (limited to 'arch/powerpc/cpu/ppc4xx/spl_boot.c') diff --git a/arch/powerpc/cpu/ppc4xx/spl_boot.c b/arch/powerpc/cpu/ppc4xx/spl_boot.c new file mode 100644 index 000000000..80869f61b --- /dev/null +++ b/arch/powerpc/cpu/ppc4xx/spl_boot.c @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2013 Stefan Roese + * + * 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. + */ + +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +/* + * Return selected boot device. On PPC4xx its only NOR flash right now. + */ +u32 spl_boot_device(void) +{ + return BOOT_DEVICE_NOR; +} + +/* + * SPL version of board_init_f() + */ +void board_init_f(ulong bootflag) +{ + /* + * First we need to initialize the SDRAM, so that the real + * U-Boot or the OS (Linux) can be loaded + */ + initdram(0); + + /* Clear bss */ + memset(__bss_start, '\0', __bss_end - __bss_start); + + /* + * Init global_data pointer. Has to be done before calling + * get_clocks(), as it stores some clock values into gd needed + * later on in the serial driver. + */ + /* Pointer is writable since we allocated a register for it */ + gd = (gd_t *)(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET); + /* Clear initial global data */ + memset((void *)gd, 0, sizeof(gd_t)); + + /* + * get_clocks() needs to be called so that the serial driver + * works correctly + */ + get_clocks(); + + /* + * Do rudimental console / serial setup + */ + preloader_console_init(); + + /* + * Call board_init_r() (SPL framework version) to load and boot + * real U-Boot or OS + */ + board_init_r(NULL, 0); + /* Does not return!!! */ +} -- cgit v1.2.3-70-g09d2