From: Hou Zhiqiang <zhiqiang....@nxp.com>
Set the enable-method in the cpu node to PSCI, and reate device
node for PSCI.
Signed-off-by: Hou Zhiqiang <zhiqiang....@nxp.com>
---
V3:
- new patch
arch/arm/cpu/armv8/Makefile | 1 +
arch/arm/cpu/armv8/cpu-dt.c | 126 ++++++++++++++++++++++++++++++++++++++++++++
arch/arm/lib/bootm-fdt.c | 2 +-
3 files changed, 128 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/cpu/armv8/cpu-dt.c
diff --git a/arch/arm/cpu/armv8/Makefile b/arch/arm/cpu/armv8/Makefile
index 1c85aa9..a295e37 100644
--- a/arch/arm/cpu/armv8/Makefile
+++ b/arch/arm/cpu/armv8/Makefile
@@ -15,6 +15,7 @@ obj-y += cache.o
obj-y += tlb.o
obj-y += transition.o
obj-y += fwcall.o
+obj-y += cpu-dt.o
obj-$(CONFIG_FSL_LAYERSCAPE) += fsl-layerscape/
obj-$(CONFIG_ARCH_ZYNQMP) += zynqmp/
diff --git a/arch/arm/cpu/armv8/cpu-dt.c b/arch/arm/cpu/armv8/cpu-dt.c
new file mode 100644
index 0000000..723277b
--- /dev/null
+++ b/arch/arm/cpu/armv8/cpu-dt.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#include <linux/sizes.h>
+#include <linux/kernel.h>
+#include <asm/armv8/sec_firmware.h>
+
+#ifdef CONFIG_MP
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_ARMV8_PSCI)
+__weak unsigned int sec_firmware_support_psci_version(void)
+{
+ return 0;
+}
+
+static int cpu_update_dt_psci(void *fdt)
+{
+ int nodeoff;
+ unsigned int psci_ver;
+ char *psci_compt;
+ int tmp;
+
+ nodeoff = fdt_path_offset(fdt, "/cpus");
+ if (nodeoff < 0) {
+ printf("couldn't find /cpus\n");
+ return nodeoff;
+ }
+
+ /* add 'enable-method = "psci"' to each cpu node */
+ for (tmp = fdt_first_subnode(fdt, nodeoff);
+ tmp >= 0;
+ tmp = fdt_next_subnode(fdt, tmp)) {
+ const struct fdt_property *prop;
+ int len;
+
+ prop = fdt_get_property(fdt, tmp, "device_type", &len);
+ if (!prop)
+ continue;
+ if (len < 4)
+ continue;
+ if (strcmp(prop->data, "cpu"))
+ continue;
+
+ /*
+ * Not checking rv here, our approach is to skip over errors in
+ * individual cpu nodes, hopefully some of the nodes are
+ * processed correctly and those will boot
+ */
+ fdt_setprop_string(fdt, tmp, "enable-method", "psci");
+ }
+
+ /*
+ * The PSCI node might be called "/psci" or might be called something
+ * else but contain either of the compatible strings
+ * "arm,psci"/"arm,psci-0.2"
+ */
+ nodeoff = fdt_path_offset(fdt, "/psci");
+ if (nodeoff >= 0)
+ goto init_psci_node;
+
+ nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci");
+ if (nodeoff >= 0)
+ goto init_psci_node;
+
+ nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci-0.2");
+ if (nodeoff >= 0)
+ goto init_psci_node;
+
+ nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci-1.0");
+ if (nodeoff >= 0)
+ goto init_psci_node;
+
+ nodeoff = fdt_path_offset(fdt, "/");
+ if (nodeoff < 0)
+ return nodeoff;
+
+ nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
+ if (nodeoff < 0)
+ return nodeoff;
+
+init_psci_node:
+ psci_ver = sec_firmware_support_psci_version();
+ switch (psci_ver) {
+ case 0x0100:
+ psci_compt = "arm,psci-1.0";
+ break;
+ case 0x0002:
+ psci_compt = "arm,psci-0.2";
+ break;
+ case 0x0001:
+ psci_compt = "arm,psci";
+ break;
+ default:
+ psci_compt = "arm,psci-0.2";
+ break;
+ }
+
+ tmp = fdt_setprop_string(fdt, nodeoff, "compatible", psci_compt);
+ if (tmp)
+ return tmp;
+
+ tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
+ if (tmp)
+ return tmp;
+
+ return 0;
+}
+#endif
+#endif
+
+int psci_update_dt(void *fdt)
+{
+#ifdef CONFIG_MP
+#if defined(CONFIG_ARMV8_PSCI)
+ cpu_update_dt_psci(fdt);
+#endif
+#endif
+ return 0;
+}
diff --git a/arch/arm/lib/bootm-fdt.c b/arch/arm/lib/bootm-fdt.c
index 7677358..c642ff8 100644
--- a/arch/arm/lib/bootm-fdt.c
+++ b/arch/arm/lib/bootm-fdt.c
@@ -42,7 +42,7 @@ int arch_fixup_fdt(void *blob)
}
ret = fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
-#ifdef CONFIG_ARMV7_NONSEC
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV8_PSCI)
if (ret)
return ret;
--
2.1.0.27.g96db324
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