mpc5200: Add SPL support
This patch adds SPL booting support (NOR flash) for the MPC5200 platforms. Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese
parent
d3aa8b8be2
commit
083f2e08d2
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@ -41,6 +41,10 @@ COBJS-y += speed.o
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COBJS-$(CONFIG_CMD_USB) += usb_ohci.o
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COBJS-$(CONFIG_CMD_USB) += usb.o
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ifdef CONFIG_SPL_BUILD
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COBJS-y += spl_boot.o
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endif
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SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
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OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS-y))
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START := $(addprefix $(obj),$(SSTART) $(CSTART))
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@ -0,0 +1,79 @@
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/*
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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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* 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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@ -50,6 +50,7 @@
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#define MSR_KERNEL (MSR_FP|MSR_ME|MSR_RI)
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#endif
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#ifndef CONFIG_SPL_BUILD
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/*
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* Set up GOT: Global Offset Table
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*
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@ -68,6 +69,7 @@
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GOT_ENTRY(__bss_end__)
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GOT_ENTRY(__bss_start)
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END_GOT
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#endif
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/*
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* Version string
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@ -84,6 +86,18 @@ version_string:
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. = EXC_OFF_SYS_RESET
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.globl _start
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_start:
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#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
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/*
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* This is the entry of the real U-Boot from a board port
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* that supports SPL booting on the MPC5200. We only need
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* to call board_init_f() here. Everything else has already
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* been done in the SPL u-boot version.
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*/
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GET_GOT /* initialize GOT access */
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bl board_init_f /* run 1st part of board init code (in Flash)*/
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/* NOTREACHED - board_init_f() does not return */
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#else
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mfmsr r5 /* save msr contents */
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/* Move CSBoot and adjust instruction pointer */
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@ -152,7 +166,9 @@ lowboot_reentry:
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/* Be careful to keep code relocatable ! */
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/*--------------------------------------------------------------*/
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#ifndef CONFIG_SPL_BUILD
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GET_GOT /* initialize GOT access */
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#endif
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/* r3: IMMR */
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bl cpu_init_f /* run low-level CPU init code (in Flash)*/
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@ -160,7 +176,9 @@ lowboot_reentry:
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bl board_init_f /* run 1st part of board init code (in Flash)*/
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/* NOTREACHED - board_init_f() does not return */
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#endif
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#ifndef CONFIG_SPL_BUILD
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/*
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* Vector Table
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*/
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@ -333,6 +351,7 @@ int_return:
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lwz r1,GPR1(r1)
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SYNC
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rfi
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#endif /* CONFIG_SPL_BUILD */
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/*
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* This code initialises the MPC5xxx processor core
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@ -522,6 +541,7 @@ get_pvr:
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mfspr r3, PVR
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blr
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#ifndef CONFIG_SPL_BUILD
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/*------------------------------------------------------------------------------*/
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/*
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@ -759,3 +779,5 @@ trap_init:
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mtlr r4 /* restore link register */
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blr
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#endif /* CONFIG_SPL_BUILD */
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@ -0,0 +1,57 @@
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/*
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* Copyright 2012 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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.text :
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{
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__start = .;
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arch/powerpc/cpu/mpc5xxx/start.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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. = ALIGN(4);
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.end_align : { *(.end_align*) } > flash
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__spl_flash_end = .;
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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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@ -0,0 +1,31 @@
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/*
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* (C) Copyright 2012
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* Texas Instruments, <www.ti.com>
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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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#ifndef _ASM_SPL_H_
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#define _ASM_SPL_H_
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#define BOOT_DEVICE_NOR 1
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/* Linker symbols */
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extern char __bss_start[], __bss_end__[];
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#endif
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@ -57,7 +57,9 @@ SOBJS-y += ticks.o
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SOBJS-y += reloc.o
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COBJS-$(CONFIG_BAT_RW) += bat_rw.o
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ifndef CONFIG_SPL_BUILD
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COBJS-y += board.o
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endif
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COBJS-y += bootm.o
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COBJS-y += cache.o
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COBJS-y += extable.o
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@ -66,6 +68,11 @@ COBJS-$(CONFIG_CMD_KGDB) += kgdb.o
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COBJS-${CONFIG_CMD_IDE} += ide.o
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COBJS-y += time.o
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# Don't include the MPC5xxx special memcpy into the
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# SPL U-Boot image. memcpy is used in the SPL NOR
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# flash driver. And we need the real, fast memcpy
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# here. We have no problems with unaligned access.
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ifndef CONFIG_SPL_BUILD
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# Workaround for local bus unaligned access problems
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# on MPC512x and MPC5200
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ifdef CONFIG_MPC512X
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@ -76,6 +83,7 @@ ifdef CONFIG_MPC5200
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$(obj)ppcstring.o: AFLAGS += -Dmemcpy=__memcpy
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COBJS-y += memcpy_mpc5200.o
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endif
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endif
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endif # not minimal
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