From: Bin Meng <bmeng.cn@gmail.com>
Date: Tue, 15 Jun 2021 05:45:57 +0000 (+0800)
Subject: riscv: andes_plic: Fix riscv_get_ipi() mask
X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=62ce0a02f9e5bda51a05c5f735e5a75f6c4bbb54;p=u-boot.git

riscv: andes_plic: Fix riscv_get_ipi() mask

Current logic in riscv_get_ipi() for Andes PLICSW does not look
correct. The mask to test IPI pending bits for a hart should be
left shifted by (8 * gd->arch.boot_hart), just the same as what
is done in riscv_send_ipi().

Fixes: 8b3e97badf97 ("riscv: add functions for reading the IPI status")
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Tested-by: Rick Chen <rick@andestech.com>
---

diff --git a/arch/riscv/lib/andes_plic.c b/arch/riscv/lib/andes_plic.c
index 221a5fe324..5e113ee8c9 100644
--- a/arch/riscv/lib/andes_plic.c
+++ b/arch/riscv/lib/andes_plic.c
@@ -105,9 +105,11 @@ int riscv_clear_ipi(int hart)
 
 int riscv_get_ipi(int hart, int *pending)
 {
+	unsigned int ipi = (SEND_IPI_TO_HART(hart) << (8 * gd->arch.boot_hart));
+
 	*pending = readl((void __iomem *)PENDING_REG(gd->arch.plic,
 						     gd->arch.boot_hart));
-	*pending = !!(*pending & SEND_IPI_TO_HART(hart));
+	*pending = !!(*pending & ipi);
 
 	return 0;
 }