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authorTom Warren <twarren.nvidia@gmail.com>2011-01-27 10:58:05 +0000
committerAlbert Aribaud <albert.aribaud@free.fr>2011-02-21 08:30:54 +0100
commit3f82b1d3abf492038e14237f9c89bd55c31770ad (patch)
tree8bbff8ff342edace852b851f10d4e8d835bd8e96 /arch/arm/cpu/armv7/tegra2/board.c
parent9b6442f99c617f147b95d9844a492c429e16e23c (diff)
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arm: Tegra2: Add basic NVIDIA Tegra2 SoC support
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'arch/arm/cpu/armv7/tegra2/board.c')
-rw-r--r--arch/arm/cpu/armv7/tegra2/board.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/tegra2/board.c b/arch/arm/cpu/armv7/tegra2/board.c
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+++ b/arch/arm/cpu/armv7/tegra2/board.c
@@ -0,0 +1,88 @@
+/*
+ * (C) Copyright 2010,2011
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/tegra2.h>
+#include <asm/arch/pmc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Boot ROM initializes the odmdata in APBDEV_PMC_SCRATCH20_0,
+ * so we are using this value to identify memory size.
+ */
+
+unsigned int query_sdram_size(void)
+{
+ struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+ u32 reg;
+
+ reg = readl(&pmc->pmc_scratch20);
+ debug("pmc->pmc_scratch20 (ODMData) = 0x%08lX\n", reg);
+
+ /* bits 31:28 in OdmData are used for RAM size */
+ switch ((reg) >> 28) {
+ case 1:
+ return 0x10000000; /* 256 MB */
+ case 2:
+ return 0x20000000; /* 512 MB */
+ case 3:
+ default:
+ return 0x40000000; /* 1GB */
+ }
+}
+
+void s_init(void)
+{
+#ifndef CONFIG_ICACHE_OFF
+ icache_enable();
+#endif
+ invalidate_dcache();
+}
+
+int dram_init(void)
+{
+ unsigned long rs;
+
+ /* We do not initialise DRAM here. We just query the size */
+ gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+ gd->bd->bi_dram[0].size = gd->ram_size = query_sdram_size();
+
+ /* Now check it dynamically */
+ rs = get_ram_size(CONFIG_SYS_SDRAM_BASE, gd->ram_size);
+ if (rs) {
+ printf("dynamic ram_size = %lu\n", rs);
+ gd->bd->bi_dram[0].size = gd->ram_size = rs;
+ }
+ return 0;
+}
+
+#ifdef CONFIG_DISPLAY_BOARDINFO
+int checkboard(void)
+{
+ printf("Board: %s\n", sysinfo.board_string);
+ return 0;
+}
+#endif /* CONFIG_DISPLAY_BOARDINFO */