mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
4a1b975dac
Add reserve memory for OP-TEE in U-Boot and in kernel device tree:
- no more reduce the DDR size in "memory" node:
CONFIG_SYS_MEM_TOP_HIDE is no more used
- U-Boot device-tree defines the needed "reserved-memory" for OP-TEE
and U-Boot should not use this reserved memory: board_get_usable_ram_top
use lmb lib to found the first free region, the not reserved
memory, enough to relocate U-Boot: the needed size of U-Boot
is estimated with gd->mon_len + CONFIG_SYS_MALLOC_LEN.
- the optee node ("optee@...": firmware with compatible "linaro,optee-tz")
and the associated "reserved-memory" are deactivated in kernel device
tree when OP-TEE is not detected by U-Boot to prevent kernel issue
(memory is reserved but not used, optee driver probe failed).
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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/*
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* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
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*/
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#include <common.h>
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#include <dm.h>
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#include <lmb.h>
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#include <ram.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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struct ram_info ram;
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struct udevice *dev;
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int ret;
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ret = uclass_get_device(UCLASS_RAM, 0, &dev);
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if (ret) {
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debug("RAM init failed: %d\n", ret);
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return ret;
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}
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ret = ram_get_info(dev, &ram);
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if (ret) {
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debug("Cannot get RAM size: %d\n", ret);
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return ret;
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}
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debug("RAM init base=%lx, size=%x\n", ram.base, ram.size);
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gd->ram_size = ram.size;
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return 0;
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}
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ulong board_get_usable_ram_top(ulong total_size)
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{
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phys_addr_t reg;
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struct lmb lmb;
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/* found enough not-reserved memory to relocated U-Boot */
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lmb_init(&lmb);
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lmb_add(&lmb, gd->ram_base, gd->ram_size);
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boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob);
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reg = lmb_alloc(&lmb, CONFIG_SYS_MALLOC_LEN + total_size, SZ_4K);
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if (reg)
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return ALIGN(reg + CONFIG_SYS_MALLOC_LEN + total_size, SZ_4K);
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return gd->ram_top;
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}
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