void fdt_cpu_fixup(void *fdt);
/**
+ * Fix up the IMSIC nodes in the device tree
+ *
+ * This routine disables IMSIC nodes which are not accessible to the next
+ * booting stage based on currently assigned domain.
+ *
+ * It is recommended that platform codes call this helper in their final_init()
+ *
+ * @param fdt: device tree blob
+ */
+void fdt_imsic_fixup(void *fdt);
+
+/**
* Fix up the PLIC node in the device tree
*
* This routine updates the "interrupt-extended" property of the PLIC node in
* General device tree fix-up
*
* This routine do all required device tree fix-ups for a typical platform.
- * It fixes up the PLIC node and the reserved memory node in the device tree
- * by calling the corresponding helper routines to accomplish the task.
+ * It fixes up the PLIC node, IMSIC nodes, and the reserved memory node in
+ * the device tree by calling the corresponding helper routines to accomplish
+ * the task.
*
* It is recommended that platform codes call this helper in their final_init()
*
}
}
+static void fdt_domain_based_fixup_one(void *fdt, int nodeoff)
+{
+ int rc;
+ uint64_t reg_addr, reg_size;
+ struct sbi_domain *dom = sbi_domain_thishart_ptr();
+
+ rc = fdt_get_node_addr_size(fdt, nodeoff, 0, ®_addr, ®_size);
+ if (rc < 0 || !reg_addr || !reg_size)
+ return;
+
+ if (!sbi_domain_check_addr(dom, reg_addr, dom->next_mode,
+ SBI_DOMAIN_READ | SBI_DOMAIN_WRITE)) {
+ rc = fdt_open_into(fdt, fdt, fdt_totalsize(fdt) + 32);
+ if (rc < 0)
+ return;
+ fdt_setprop_string(fdt, nodeoff, "status", "disabled");
+ }
+}
+
+void fdt_imsic_fixup(void *fdt)
+{
+ int noff = 0;
+
+ while ((noff = fdt_node_offset_by_compatible(fdt, noff,
+ "riscv,imsics")) >= 0)
+ fdt_domain_based_fixup_one(fdt, noff);
+}
+
void fdt_plic_fixup(void *fdt)
{
u32 *cells;
void fdt_fixups(void *fdt)
{
+ fdt_imsic_fixup(fdt);
+
fdt_plic_fixup(fdt);
fdt_reserved_memory_fixup(fdt);
fdt_pmu_fixup(fdt);
}
-
-