[U-Boot] [PATCHv7 4/6] ARMv8/Layerscape: switch SMP method accordingly

[Zhiqiang Hou]

From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>

If the PSCI and PPA is ready, skip the fixup for spin-table and
waking secondary cores. Otherwise, change SMP method to spin-table,
and the device node of PSCI will be removed.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
---
V7:
 - Removed the redundant "? true : false".

V6:
 - no change

V5:
 - Changed the checking if the PSCI feature is ready to read the psci version.

V4:
 - Reordered this patch.

 arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 16 +++++++++++++---
 arch/arm/cpu/armv8/fsl-layerscape/fdt.c | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index d5bcf67..9cd6232 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -23,6 +23,9 @@
 #ifdef CONFIG_FSL_ESDHC
 #include <fsl_esdhc.h>
 #endif
+#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
+#include <asm/armv8/sec_firmware.h>
+#endif
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -622,6 +625,7 @@ int arch_early_init_r(void)
 {
 #ifdef CONFIG_MP
 	int rv = 1;
+	u32 psci_ver = 0xffffffff;
 #endif
 
 #ifdef CONFIG_SYS_FSL_ERRATUM_A009635
@@ -629,9 +633,15 @@ int arch_early_init_r(void)
 #endif
 
 #ifdef CONFIG_MP
-	rv = fsl_layerscape_wake_seconday_cores();
-	if (rv)
-		printf("Did not wake secondary cores\n");
+#if defined(CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT) && defined(CONFIG_ARMV8_PSCI)
+	/* Check the psci version to determine if the psci is supported */
+	psci_ver = sec_firmware_support_psci_version();
+#endif
+	if (psci_ver == 0xffffffff) {
+		rv = fsl_layerscape_wake_seconday_cores();
+		if (rv)
+			printf("Did not wake secondary cores\n");
+	}
 #endif
 
 #ifdef CONFIG_SYS_HAS_SERDES
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
index d17227a..40d6a76 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
@@ -22,6 +22,9 @@
 #endif
 #include <fsl_sec.h>
 #include <asm/arch-fsl-layerscape/soc.h>
+#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
+#include <asm/armv8/sec_firmware.h>
+#endif
 
 int fdt_fixup_phy_connection(void *blob, int offset, phy_interface_t phyc)
 {
@@ -38,7 +41,37 @@ void ft_fixup_cpu(void *blob)
 	int addr_cells;
 	u64 val, core_id;
 	size_t *boot_code_size = &(__secondary_boot_code_size);
+#if defined(CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT) && defined(CONFIG_ARMV8_PSCI)
+	int node;
+	u32 psci_ver;
+
+	/* Check the psci version to determine if the psci is supported */
+	psci_ver = sec_firmware_support_psci_version();
+	if (psci_ver == 0xffffffff) {
+		/* remove psci DT node */
+		node = fdt_path_offset(blob, "/psci");
+		if (node >= 0)
+			goto remove_psci_node;
+
+		node = fdt_node_offset_by_compatible(blob, -1, "arm,psci");
+		if (node >= 0)
+			goto remove_psci_node;
+
+		node = fdt_node_offset_by_compatible(blob, -1, "arm,psci-0.2");
+		if (node >= 0)
+			goto remove_psci_node;
 
+		node = fdt_node_offset_by_compatible(blob, -1, "arm,psci-1.0");
+		if (node >= 0)
+			goto remove_psci_node;
+
+remove_psci_node:
+		if (node >= 0)
+			fdt_del_node(blob, node);
+	} else {
+		return;
+	}
+#endif
 	off = fdt_path_offset(blob, "/cpus");
 	if (off < 0) {
 		puts("couldn't find /cpus node\n");
-- 
2.1.0.27.g96db324