mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 03:06:16 +09:00
3dea63c844
On RISC-V, all harts boot independently. To be able to run on a multi-hart system, U-Boot must be extended with the functionality to manage all harts in the system. All harts entering U-Boot are registered in the available_harts mask stored in global data. A hart lottery system as used in the Linux kernel selects the hart U-Boot runs on. All other harts are halted. U-Boot can delegate functions to them using smp_call_function(). Every hart has a valid pointer to the global data structure and a 8KiB stack by default. The stack size is set with CONFIG_STACK_SIZE_SHIFT. Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
21 lines
427 B
C
21 lines
427 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
|
|
*
|
|
* From arch/x86/lib/asm-offsets.c
|
|
*
|
|
* This program is used to generate definitions needed by
|
|
* assembly language modules.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <linux/kbuild.h>
|
|
|
|
int main(void)
|
|
{
|
|
DEFINE(GD_BOOT_HART, offsetof(gd_t, arch.boot_hart));
|
|
DEFINE(GD_AVAILABLE_HARTS, offsetof(gd_t, arch.available_harts));
|
|
|
|
return 0;
|
|
}
|