diff options
| -rw-r--r-- | arch/riscv/Kconfig | 7 | ||||
| -rw-r--r-- | arch/riscv/cpu/cpu.c | 2 | ||||
| -rw-r--r-- | arch/riscv/cpu/start.S | 13 | ||||
| -rw-r--r-- | arch/riscv/include/asm/global_data.h | 2 | ||||
| -rw-r--r-- | arch/riscv/lib/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/riscv/lib/smp.c | 2 |
6 files changed, 23 insertions, 5 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index c042506a64..32a90b83b5 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -276,6 +276,13 @@ config SPL_XIP rely on lock variables (for example hart_lottery and available_harts_lock), this affects only SPL, other stages should proceed as non-XIP. +config AVAILABLE_HARTS + bool "Send IPI by available harts" + default y + help + By default, IPI sending mechanism will depend on available_harts. + If disable this, it will send IPI by CPUs node numbers of device tree. + config SHOW_REGS bool "Show registers on unhandled exception" diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c index 0f323b26b3..52ab02519f 100644 --- a/arch/riscv/cpu/cpu.c +++ b/arch/riscv/cpu/cpu.c @@ -22,12 +22,14 @@ #if !CONFIG_IS_ENABLED(XIP) u32 hart_lottery __section(".data") = 0; +#ifdef CONFIG_AVAILABLE_HARTS /* * The main hart running U-Boot has acquired available_harts_lock until it has * finished initialization of global data. */ u32 available_harts_lock = 1; #endif +#endif static inline bool supports_extension(char ext) { diff --git a/arch/riscv/cpu/start.S b/arch/riscv/cpu/start.S index de9d078da1..4687bca3c9 100644 --- a/arch/riscv/cpu/start.S +++ b/arch/riscv/cpu/start.S @@ -153,21 +153,23 @@ call_harts_early_init: SREG tp, GD_BOOT_HART(gp) #if !CONFIG_IS_ENABLED(XIP) +#ifdef CONFIG_AVAILABLE_HARTS la t0, available_harts_lock amoswap.w.rl zero, zero, 0(t0) +#endif wait_for_gd_init: - la t0, available_harts_lock - li t1, 1 -1: amoswap.w.aq t1, t1, 0(t0) - bnez t1, 1b - /* * Set the global data pointer only when gd_t has been initialized. * This was already set by arch_setup_gd on the boot hart, but all other * harts' global data pointers gets set here. */ mv gp, s0 +#ifdef CONFIG_AVAILABLE_HARTS + la t0, available_harts_lock + li t1, 1 +1: amoswap.w.aq t1, t1, 0(t0) + bnez t1, 1b /* register available harts in the available_harts mask */ li t1, 1 @@ -177,6 +179,7 @@ wait_for_gd_init: SREG t2, GD_AVAILABLE_HARTS(gp) amoswap.w.rl zero, zero, 0(t0) +#endif /* * Continue on hart lottery winner, others branch to diff --git a/arch/riscv/include/asm/global_data.h b/arch/riscv/include/asm/global_data.h index b3c79e1760..858594a191 100644 --- a/arch/riscv/include/asm/global_data.h +++ b/arch/riscv/include/asm/global_data.h @@ -28,8 +28,10 @@ struct arch_global_data { struct ipi_data ipi[CONFIG_NR_CPUS]; #endif #if !CONFIG_IS_ENABLED(XIP) +#ifdef CONFIG_AVAILABLE_HARTS ulong available_harts; #endif +#endif }; #include <asm-generic/global_data.h> diff --git a/arch/riscv/lib/asm-offsets.c b/arch/riscv/lib/asm-offsets.c index c4f48c8373..452dfcea97 100644 --- a/arch/riscv/lib/asm-offsets.c +++ b/arch/riscv/lib/asm-offsets.c @@ -17,8 +17,10 @@ int main(void) DEFINE(GD_BOOT_HART, offsetof(gd_t, arch.boot_hart)); DEFINE(GD_FIRMWARE_FDT_ADDR, offsetof(gd_t, arch.firmware_fdt_addr)); #if !CONFIG_IS_ENABLED(XIP) +#ifdef CONFIG_AVAILABLE_HARTS DEFINE(GD_AVAILABLE_HARTS, offsetof(gd_t, arch.available_harts)); #endif +#endif return 0; } diff --git a/arch/riscv/lib/smp.c b/arch/riscv/lib/smp.c index f8b756291f..c0f65af191 100644 --- a/arch/riscv/lib/smp.c +++ b/arch/riscv/lib/smp.c @@ -46,10 +46,12 @@ static int send_ipi_many(struct ipi_data *ipi, int wait) } #if !CONFIG_IS_ENABLED(XIP) +#ifdef CONFIG_AVAILABLE_HARTS /* skip if hart is not available */ if (!(gd->arch.available_harts & (1 << reg))) continue; #endif +#endif gd->arch.ipi[reg].addr = ipi->addr; gd->arch.ipi[reg].arg0 = ipi->arg0; |