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https://github.com/AsahiLinux/u-boot
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e0465f80bd
In SMP all harts will register themself in available_hart during start up. Then main hart will send IPI to other harts according to this variables. But this mechanism may not guarantee that all other harts can jump to next stage. When main hart is sending IPI to other hart according to available_harts, but other harts maybe still not finish the registration. Then the SMP booting will miss some harts finally. So let it become an option and it will be enabled by default. Please refer to the discussion: https://www.mail-archive.com/u-boot@lists.denx.de/msg449997.html Signed-off-by: Rick Chen <rick@andestech.com> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Copyright (c) 2017 Microsemi Corporation.
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* Padmarao Begari, Microsemi Corporation <padmarao.begari@microsemi.com>
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*/
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#ifndef __ASM_GBL_DATA_H
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#define __ASM_GBL_DATA_H
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#include <asm/smp.h>
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#include <asm/u-boot.h>
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#include <compiler.h>
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/* Architecture-specific global data */
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struct arch_global_data {
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long boot_hart; /* boot hart id */
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phys_addr_t firmware_fdt_addr;
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#if CONFIG_IS_ENABLED(SIFIVE_CLINT)
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void __iomem *clint; /* clint base address */
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#endif
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#ifdef CONFIG_ANDES_PLIC
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void __iomem *plic; /* plic base address */
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#endif
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#if CONFIG_IS_ENABLED(SMP)
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struct ipi_data ipi[CONFIG_NR_CPUS];
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#endif
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#if !CONFIG_IS_ENABLED(XIP)
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#ifdef CONFIG_AVAILABLE_HARTS
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ulong available_harts;
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#endif
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#endif
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};
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#include <asm-generic/global_data.h>
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#define DECLARE_GLOBAL_DATA_PTR register gd_t *gd asm ("gp")
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static inline void set_gd(volatile gd_t *gd_ptr)
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{
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#ifdef CONFIG_64BIT
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asm volatile("ld gp, %0\n" : : "m"(gd_ptr));
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#else
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asm volatile("lw gp, %0\n" : : "m"(gd_ptr));
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#endif
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}
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#endif /* __ASM_GBL_DATA_H */
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