fix(risc-v, virt64, plic): use volatile rw for claim and complete

Tang-Haojin · Rbb666 · commit 893ae7d7ba4d · 2025-09-03T09:48:22.000+08:00
diff --git a/bsp/xuantie/virt64/c906/libcpu/plic.c b/bsp/xuantie/virt64/c906/libcpu/plic.c
@@ -93,7 +93,7 @@ void plic_set_threshold(int threshold)
 int plic_claim(void)
 {
     int hart = __raw_hartid();
-    int irq = *(uint32_t *)PLIC_CLAIM(hart);
+    int irq = readl((uint32_t *)PLIC_CLAIM(hart));
     return irq;
 }
 
@@ -110,7 +110,7 @@ int plic_claim(void)
 void plic_complete(int irq)
 {
     int hart = __raw_hartid();
-    *(uint32_t *)PLIC_COMPLETE(hart) = irq;
+    writel(irq, (uint32_t *)PLIC_COMPLETE(hart));
 }
 
 void plic_set_ie(rt_uint32_t word_index, rt_uint32_t val)
diff --git a/libcpu/risc-v/virt64/plic.c b/libcpu/risc-v/virt64/plic.c
@@ -93,7 +93,7 @@ void plic_set_threshold(int threshold)
 int plic_claim(void)
 {
     int hart = __raw_hartid();
-    int irq = *(uint32_t *)PLIC_CLAIM(hart);
+    int irq = readl((uint32_t *)PLIC_CLAIM(hart));
     return irq;
 }
 
@@ -110,7 +110,7 @@ int plic_claim(void)
 void plic_complete(int irq)
 {
     int hart = __raw_hartid();
-    *(uint32_t *)PLIC_COMPLETE(hart) = irq;
+    writel(irq, (uint32_t *)PLIC_COMPLETE(hart));
 }
 
 void plic_set_ie(rt_uint32_t word_index, rt_uint32_t val)

Original file line number	Diff line number	Diff line change
`@@ -93,7 +93,7 @@ void plic_set_threshold(int threshold)`
`93`	`93`	`int plic_claim(void)`
`94`	`94`	`{`
`95`	`95`	`int hart = __raw_hartid();`
`96`		`- int irq = (uint32_t )PLIC_CLAIM(hart);`
	`96`	`+ int irq = readl((uint32_t *)PLIC_CLAIM(hart));`
`97`	`97`	`return irq;`
`98`	`98`	`}`
`99`	`99`
`@@ -110,7 +110,7 @@ int plic_claim(void)`
`110`	`110`	`void plic_complete(int irq)`
`111`	`111`	`{`
`112`	`112`	`int hart = __raw_hartid();`
`113`		`- (uint32_t )PLIC_COMPLETE(hart) = irq;`
	`113`	`+ writel(irq, (uint32_t *)PLIC_COMPLETE(hart));`
`114`	`114`	`}`
`115`	`115`
`116`	`116`	`void plic_set_ie(rt_uint32_t word_index, rt_uint32_t val)`