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e42f096f78
The Odroid C2 has two GiB of memory with two reserved regions.
reg = <0x0 0x0 0x0 0x1000000>;
reg = <0x0 0x10000000 0x0 0x200000>;
Patch
bfcef28ae4 (arm: add initial support for Amlogic Meson and
ODROID-C2) provided function dram_init_banksize to reserve the
first 16 MiB of RAM for firmware in function dram_init_banksize
in arch/arm/mach-meson/board.c and defined
CONFIG_NR_DRAM_BANKS = 1.
With this patch dram_init_banksize is changed to additionally
reserve the 2MiB region for the ARM Trusted Firmware (BL31).
CONFIG_NR_DRAM_BANKS is set to 2.
Cc: Andreas Färber <afaerber@suse.de>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*
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* (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <libfdt.h>
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#include <linux/err.h>
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#include <asm/arch/gxbb.h>
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#include <asm/arch/sm.h>
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#include <asm/armv8/mmu.h>
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#include <asm/unaligned.h>
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DECLARE_GLOBAL_DATA_PTR;
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int dram_init(void)
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{
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const fdt64_t *val;
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int offset;
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int len;
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offset = fdt_path_offset(gd->fdt_blob, "/memory");
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if (offset < 0)
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return -EINVAL;
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val = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
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if (len < sizeof(*val) * 2)
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return -EINVAL;
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/* Use unaligned access since cache is still disabled */
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gd->ram_size = get_unaligned_be64(&val[1]);
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return 0;
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}
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int dram_init_banksize(void)
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{
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/* Reserve first 16 MiB of RAM for firmware */
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gd->bd->bi_dram[0].start = 0x1000000;
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gd->bd->bi_dram[0].size = 0xf000000;
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/* Reserve 2 MiB for ARM Trusted Firmware (BL31) */
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gd->bd->bi_dram[1].start = 0x10000000;
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gd->bd->bi_dram[1].size = gd->ram_size - 0x10200000;
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return 0;
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}
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void reset_cpu(ulong addr)
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{
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psci_system_reset();
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}
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static struct mm_region gxbb_mem_map[] = {
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{
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.virt = 0x0UL,
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.phys = 0x0UL,
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.size = 0x80000000UL,
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.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
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PTE_BLOCK_INNER_SHARE
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}, {
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.virt = 0x80000000UL,
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.phys = 0x80000000UL,
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.size = 0x80000000UL,
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.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
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PTE_BLOCK_NON_SHARE |
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PTE_BLOCK_PXN | PTE_BLOCK_UXN
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}, {
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/* List terminator */
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0,
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}
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};
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struct mm_region *mem_map = gxbb_mem_map;
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