diff --git a/arch/riscv/lib/andes_plic.c b/arch/riscv/lib/andes_plic.c index 42394b9b6e1e272a643d55c8cf042b36d22311f3..3868569a65a96d1ad4a7ad34901661d7ef87c0d0 100644 --- a/arch/riscv/lib/andes_plic.c +++ b/arch/riscv/lib/andes_plic.c @@ -117,6 +117,17 @@ int riscv_clear_ipi(int hart) return 0; } +int riscv_get_ipi(int hart, int *pending) +{ + PLIC_BASE_GET(); + + *pending = readl((void __iomem *)PENDING_REG(gd->arch.plic, + gd->arch.boot_hart)); + *pending = !!(*pending & SEND_IPI_TO_HART(hart)); + + return 0; +} + static const struct udevice_id andes_plic_ids[] = { { .compatible = "riscv,plic1", .data = RISCV_SYSCON_PLIC }, { } diff --git a/arch/riscv/lib/sbi_ipi.c b/arch/riscv/lib/sbi_ipi.c index 170346da68c23feca6c55506276720a3c386f795..9a698ce74e67127209c46cec82fbee9e2e907f19 100644 --- a/arch/riscv/lib/sbi_ipi.c +++ b/arch/riscv/lib/sbi_ipi.c @@ -23,3 +23,14 @@ int riscv_clear_ipi(int hart) return 0; } + +int riscv_get_ipi(int hart, int *pending) +{ + /* + * The SBI does not support reading the IPI status. We always return 0 + * to indicate that no IPI is pending. + */ + *pending = 0; + + return 0; +} diff --git a/arch/riscv/lib/sifive_clint.c b/arch/riscv/lib/sifive_clint.c index d24e0d585b5380b15102ba3f91cac6fcf89fa058..d7899d16d7a2be5fe988c450afa262d1eb99eb3d 100644 --- a/arch/riscv/lib/sifive_clint.c +++ b/arch/riscv/lib/sifive_clint.c @@ -71,6 +71,15 @@ int riscv_clear_ipi(int hart) return 0; } +int riscv_get_ipi(int hart, int *pending) +{ + CLINT_BASE_GET(); + + *pending = readl((void __iomem *)MSIP_REG(gd->arch.clint, hart)); + + return 0; +} + static const struct udevice_id sifive_clint_ids[] = { { .compatible = "riscv,clint0", .data = RISCV_SYSCON_CLINT }, { } diff --git a/arch/riscv/lib/smp.c b/arch/riscv/lib/smp.c index 705437862a0d1402f13c4cf0f5e62e6ccabb5d06..188a7e34bd071128b1de31041b090dc030880bf8 100644 --- a/arch/riscv/lib/smp.c +++ b/arch/riscv/lib/smp.c @@ -32,6 +32,18 @@ extern int riscv_send_ipi(int hart); */ extern int riscv_clear_ipi(int hart); +/** + * riscv_get_ipi() - Get status of inter-processor interrupt (IPI) + * + * Platform code must provide this function. + * + * @hart: Hart ID of hart to be checked + * @pending: Pointer to variable with result of the check, + * 1 if IPI is pending, 0 otherwise + * @return 0 if OK, -ve on error + */ +extern int riscv_get_ipi(int hart, int *pending); + static int send_ipi_many(struct ipi_data *ipi) { ofnode node, cpus;