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 <sr@denx.de>
This commit is contained in:
Stefan Roese
parent
d10f68ae47
commit
98f99e9f16
|
|
@ -68,6 +68,10 @@ COBJS += miiphy.o
|
|||
COBJS += uic.o
|
||||
endif
|
||||
|
||||
ifdef CONFIG_SPL_BUILD
|
||||
COBJS-y += spl_boot.o
|
||||
endif
|
||||
|
||||
SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
|
||||
OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS) $(COBJS-y))
|
||||
START := $(addprefix $(obj),$(START))
|
||||
|
|
|
|||
|
|
@ -0,0 +1,72 @@
|
|||
/*
|
||||
* Copyright (C) 2013 Stefan Roese <sr@denx.de>
|
||||
*
|
||||
* 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 <common.h>
|
||||
#include <spl.h>
|
||||
|
||||
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!!! */
|
||||
}
|
||||
|
|
@ -232,7 +232,7 @@
|
|||
*
|
||||
* Use r12 to access the GOT
|
||||
*/
|
||||
#if !defined(CONFIG_NAND_SPL)
|
||||
#if !defined(CONFIG_NAND_SPL) && !defined(CONFIG_SPL_BUILD)
|
||||
START_GOT
|
||||
GOT_ENTRY(_GOT2_TABLE_)
|
||||
GOT_ENTRY(_FIXUP_TABLE_)
|
||||
|
|
@ -248,7 +248,8 @@
|
|||
END_GOT
|
||||
#endif /* CONFIG_NAND_SPL */
|
||||
|
||||
#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
|
||||
#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL) && \
|
||||
!defined(CONFIG_SPL_BUILD)
|
||||
/*
|
||||
* NAND U-Boot image is started from offset 0
|
||||
*/
|
||||
|
|
@ -270,6 +271,18 @@
|
|||
bl _start_440
|
||||
#endif
|
||||
|
||||
#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
|
||||
/*
|
||||
* This is the entry of the real U-Boot from a board port
|
||||
* that supports SPL booting on the PPC4xx. We only need
|
||||
* to call board_init_f() here. Everything else has already
|
||||
* been done in the SPL u-boot version.
|
||||
*/
|
||||
GET_GOT /* initialize GOT access */
|
||||
bl board_init_f /* run 1st part of board init code (in Flash)*/
|
||||
/* NOTREACHED - board_init_f() does not return */
|
||||
#endif
|
||||
|
||||
/*
|
||||
* 440 Startup -- on reset only the top 4k of the effective
|
||||
* address space is mapped in by an entry in the instruction
|
||||
|
|
@ -539,7 +552,7 @@ tlbnx2: addi r4,r4,1 /* Next TLB */
|
|||
* r3 - 1st arg to board_init(): IMMP pointer
|
||||
* r4 - 2nd arg to board_init(): boot flag
|
||||
*/
|
||||
#ifndef CONFIG_NAND_SPL
|
||||
#if !defined(CONFIG_NAND_SPL) && !defined(CONFIG_SPL_BUILD)
|
||||
.text
|
||||
.long 0x27051956 /* U-Boot Magic Number */
|
||||
.globl version_string
|
||||
|
|
@ -612,6 +625,18 @@ _end_of_vectors:
|
|||
.globl _start
|
||||
_start:
|
||||
|
||||
#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
|
||||
/*
|
||||
* This is the entry of the real U-Boot from a board port
|
||||
* that supports SPL booting on the PPC4xx. We only need
|
||||
* to call board_init_f() here. Everything else has already
|
||||
* been done in the SPL u-boot version.
|
||||
*/
|
||||
GET_GOT /* initialize GOT access */
|
||||
bl board_init_f /* run 1st part of board init code (in Flash)*/
|
||||
/* NOTREACHED - board_init_f() does not return */
|
||||
#endif
|
||||
|
||||
/*****************************************************************************/
|
||||
#if defined(CONFIG_440)
|
||||
|
||||
|
|
@ -796,7 +821,9 @@ _start:
|
|||
#ifdef CONFIG_NAND_SPL
|
||||
bl nand_boot_common /* will not return */
|
||||
#else
|
||||
#ifndef CONFIG_SPL_BUILD
|
||||
GET_GOT
|
||||
#endif
|
||||
|
||||
bl cpu_init_f /* run low-level CPU init code (from Flash) */
|
||||
bl board_init_f
|
||||
|
|
@ -1080,7 +1107,7 @@ _start:
|
|||
/*----------------------------------------------------------------------- */
|
||||
|
||||
|
||||
#ifndef CONFIG_NAND_SPL
|
||||
#if !defined(CONFIG_NAND_SPL) && !defined(CONFIG_SPL_BUILD)
|
||||
/*
|
||||
* This code finishes saving the registers to the exception frame
|
||||
* and jumps to the appropriate handler for the exception.
|
||||
|
|
@ -1262,6 +1289,7 @@ in32r:
|
|||
lwbrx r3,r0,r3
|
||||
blr
|
||||
|
||||
#if !defined(CONFIG_SPL_BUILD)
|
||||
/*
|
||||
* void relocate_code (addr_sp, gd, addr_moni)
|
||||
*
|
||||
|
|
@ -1626,6 +1654,7 @@ __440_msr_continue:
|
|||
|
||||
mtlr r4 /* restore link register */
|
||||
blr
|
||||
#endif /* CONFIG_SPL_BUILD */
|
||||
|
||||
#if defined(CONFIG_440)
|
||||
/*----------------------------------------------------------------------------+
|
||||
|
|
|
|||
|
|
@ -0,0 +1,74 @@
|
|||
/*
|
||||
* Copyright 2012-2013 Stefan Roese <sr@denx.de>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
MEMORY
|
||||
{
|
||||
sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR,
|
||||
LENGTH = CONFIG_SPL_BSS_MAX_SIZE
|
||||
flash : ORIGIN = CONFIG_SPL_TEXT_BASE,
|
||||
LENGTH = CONFIG_SYS_SPL_MAX_LEN
|
||||
}
|
||||
|
||||
OUTPUT_ARCH(powerpc)
|
||||
ENTRY(_start)
|
||||
SECTIONS
|
||||
{
|
||||
#ifdef CONFIG_440
|
||||
.bootpg 0xfffff000 :
|
||||
{
|
||||
arch/powerpc/cpu/ppc4xx/start.o (.bootpg)
|
||||
|
||||
/*
|
||||
* PPC440 board need a board specific object with the
|
||||
* TLB definitions. This needs to get included right after
|
||||
* start.o, since the first shadow TLB only covers 4k
|
||||
* of address space.
|
||||
*/
|
||||
CONFIG_BOARDDIR/init.o (.bootpg)
|
||||
} > flash
|
||||
#endif
|
||||
|
||||
.resetvec 0xFFFFFFFC :
|
||||
{
|
||||
KEEP(*(.resetvec))
|
||||
} > flash
|
||||
|
||||
.text :
|
||||
{
|
||||
__start = .;
|
||||
arch/powerpc/cpu/ppc4xx/start.o (.text)
|
||||
CONFIG_BOARDDIR/init.o (.text)
|
||||
*(.text*)
|
||||
} > flash
|
||||
|
||||
. = ALIGN(4);
|
||||
.data : { *(SORT_BY_ALIGNMENT(.data*)) } > flash
|
||||
|
||||
. = ALIGN(4);
|
||||
.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } > flash
|
||||
|
||||
.bss :
|
||||
{
|
||||
. = ALIGN(4);
|
||||
__bss_start = .;
|
||||
*(.bss*)
|
||||
. = ALIGN(4);
|
||||
__bss_end = .;
|
||||
} > sdram
|
||||
}
|
||||
|
|
@ -96,6 +96,7 @@ SECTIONS
|
|||
. = ALIGN(256);
|
||||
__init_end = .;
|
||||
|
||||
#ifndef CONFIG_SPL
|
||||
#ifdef CONFIG_440
|
||||
.bootpg RESET_VECTOR_ADDRESS - 0xffc :
|
||||
{
|
||||
|
|
@ -132,6 +133,7 @@ SECTIONS
|
|||
#if (RESET_VECTOR_ADDRESS == 0xfffffffc)
|
||||
. |= 0x10;
|
||||
#endif
|
||||
#endif /* CONFIG_SPL */
|
||||
|
||||
__bss_start = .;
|
||||
.bss (NOLOAD) :
|
||||
|
|
|
|||
Loading…
Reference in New Issue