diff options
| author | Lukas Auer <lukas.auer@aisec.fraunhofer.de> | 2019-03-17 19:28:37 +0100 |
|---|---|---|
| committer | Andes <uboot@andestech.com> | 2019-04-08 09:44:26 +0800 |
| commit | 3dea63c8445b25eb3de471410bbafcf54c9f0e9b (patch) | |
| tree | c1f7e822e73d88ff13c04d723fbf7e15a27270a2 /arch/riscv/include/asm | |
| parent | 1446b26f7652124f0e3e98c348cdbc4fc55eb0cb (diff) | |
riscv: add support for multi-hart systems
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>
Diffstat (limited to 'arch/riscv/include/asm')
| -rw-r--r-- | arch/riscv/include/asm/csr.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index 86136f542c..644e6baa15 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -46,6 +46,7 @@ #endif /* Interrupt Enable and Interrupt Pending flags */ +#define MIE_MSIE _AC(0x00000008, UL) /* Software Interrupt Enable */ #define SIE_SSIE _AC(0x00000002, UL) /* Software Interrupt Enable */ #define SIE_STIE _AC(0x00000020, UL) /* Timer Interrupt Enable */ |