From bdb238355c37ac175520577fd2355f01db29714b Mon Sep 17 00:00:00 2001
From: Yu Chien Peter Lin <peterlin@andestech.com>
Date: Fri, 14 Oct 2022 15:00:18 +0800
Subject: [PATCH] riscv: andes_plic.c: use modified IPI scheme

The IPI scheme in OpenSBI has been updated to support 8-core AE350
platform, the plicsw configuration needs to be modified accordingly.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>

The patch was imported from the U-boot git server
(https://source.denx.de/u-boot/u-boot.git) as of commit id
bdb238355c37ac175520577fd2355f01db29714b.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
---
 arch/riscv/lib/andes_plic.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/lib/andes_plic.c b/arch/riscv/lib/andes_plic.c
index 68514758a8..1eabcacd09 100644
--- a/arch/riscv/lib/andes_plic.c
+++ b/arch/riscv/lib/andes_plic.c
@@ -27,8 +27,8 @@
 /* claim register */
 #define CLAIM_REG(base, hart)	((ulong)(base) + 0x200004 + (hart) * 0x1000)
 
-#define ENABLE_HART_IPI         (0x80808080)
-#define SEND_IPI_TO_HART(hart)  (0x80 >> (hart))
+#define ENABLE_HART_IPI         (0x01010101)
+#define SEND_IPI_TO_HART(hart)  (0x1 << (hart))
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -36,8 +36,9 @@ static int enable_ipi(int hart)
 {
 	unsigned int en;
 
-	en = ENABLE_HART_IPI >> hart;
+	en = ENABLE_HART_IPI << hart;
 	writel(en, (void __iomem *)ENABLE_REG(gd->arch.plic, hart));
+	writel(en, (void __iomem *)ENABLE_REG(gd->arch.plic + 0x4, hart));
 
 	return 0;
 }
-- 
2.34.1

