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https://github.com/AsahiLinux/u-boot
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7f8c070ff9
In board_init_f() the gd->bd pointer is not valid when dram_init() is called. This only avoids dying because DRAM is at zero on Tegra2. The common ARM routine sets up the banks in the same way anyway, so we can just remove this code. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/*
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* (C) Copyright 2010,2011
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* NVIDIA Corporation <www.nvidia.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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#include <common.h>
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#include <asm/io.h>
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#include "ap20.h"
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/tegra2.h>
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#include <asm/arch/pmc.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Boot ROM initializes the odmdata in APBDEV_PMC_SCRATCH20_0,
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* so we are using this value to identify memory size.
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*/
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unsigned int query_sdram_size(void)
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{
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struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
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u32 reg;
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reg = readl(&pmc->pmc_scratch20);
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debug("pmc->pmc_scratch20 (ODMData) = 0x%08x\n", reg);
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/* bits 31:28 in OdmData are used for RAM size */
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switch ((reg) >> 28) {
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case 1:
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return 0x10000000; /* 256 MB */
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case 2:
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return 0x20000000; /* 512 MB */
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case 3:
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default:
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return 0x40000000; /* 1GB */
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}
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}
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int dram_init(void)
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{
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/* We do not initialise DRAM here. We just query the size */
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gd->ram_size = query_sdram_size();
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return 0;
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}
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#ifdef CONFIG_DISPLAY_BOARDINFO
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int checkboard(void)
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{
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printf("Board: %s\n", sysinfo.board_string);
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return 0;
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}
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#endif /* CONFIG_DISPLAY_BOARDINFO */
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#ifdef CONFIG_ARCH_CPU_INIT
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/*
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* Note this function is executed by the ARM7TDMI AVP. It does not return
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* in this case. It is also called once the A9 starts up, but does nothing in
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* that case.
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*/
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int arch_cpu_init(void)
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{
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/* Fire up the Cortex A9 */
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tegra2_start();
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return 0;
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}
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#endif
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