[U-Boot] [PATCH v3 4/5] ARMv8: Setup PSCI memory and device tree

[macro.wave.z at gmail.com]

From: Hongbo Zhang <hongbo.zhang at nxp.com>

The newly added ARMv8 PSCI needs to be initialized, be copied or reserved in
right place, this patch does all the setup steps.

Signed-off-by: Hongbo Zhang <hongbo.zhang at nxp.com>
---
 arch/arm/cpu/armv8/cpu-dt.c   |  8 ++++++++
 arch/arm/cpu/armv8/cpu.c      | 22 ++++++++++++++++++++++
 arch/arm/include/asm/secure.h |  2 +-
 arch/arm/include/asm/system.h | 11 +++++++++++
 arch/arm/lib/bootm.c          |  3 +++
 arch/arm/lib/psci-dt.c        |  2 +-
 6 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/arch/arm/cpu/armv8/cpu-dt.c b/arch/arm/cpu/armv8/cpu-dt.c
index 9ffb49c..f227a10 100644
--- a/arch/arm/cpu/armv8/cpu-dt.c
+++ b/arch/arm/cpu/armv8/cpu-dt.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <asm/psci.h>
+#include <asm/system.h>
 #ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
 #include <asm/armv8/sec_firmware.h>
 #endif
@@ -25,6 +26,13 @@ int psci_update_dt(void *fdt)
 		return 0;
 #endif
 	fdt_psci(fdt);
+
+#ifndef CONFIG_ARMV8_SECURE_BASE
+	/* secure code lives in RAM, keep it alive */
+	fdt_add_mem_rsv(fdt, (unsigned long)__secure_start,
+			__secure_end - __secure_start);
+#endif
+
 #endif
 #endif
 	return 0;
diff --git a/arch/arm/cpu/armv8/cpu.c b/arch/arm/cpu/armv8/cpu.c
index e06c3cc..5dcb5e2 100644
--- a/arch/arm/cpu/armv8/cpu.c
+++ b/arch/arm/cpu/armv8/cpu.c
@@ -14,6 +14,7 @@
 #include <common.h>
 #include <command.h>
 #include <asm/system.h>
+#include <asm/secure.h>
 #include <linux/compiler.h>
 
 int cleanup_before_linux(void)
@@ -41,3 +42,24 @@ int cleanup_before_linux(void)
 
 	return 0;
 }
+
+#ifdef CONFIG_ARMV8_PSCI
+static void relocate_secure_section(void)
+{
+#ifdef CONFIG_ARMV8_SECURE_BASE
+	size_t sz = __secure_end - __secure_start;
+
+	memcpy((void *)CONFIG_ARMV8_SECURE_BASE, __secure_start, sz);
+	flush_dcache_range(CONFIG_ARMV8_SECURE_BASE,
+			   CONFIG_ARMV8_SECURE_BASE + sz + 1);
+	invalidate_icache_all();
+#endif
+}
+
+void armv8_setup_psci(void)
+{
+	relocate_secure_section();
+	secure_ram_addr(psci_setup_vectors)();
+	secure_ram_addr(psci_arch_init)();
+}
+#endif
diff --git a/arch/arm/include/asm/secure.h b/arch/arm/include/asm/secure.h
index 5a403bc..d23044a 100644
--- a/arch/arm/include/asm/secure.h
+++ b/arch/arm/include/asm/secure.h
@@ -6,7 +6,7 @@
 #define __secure __attribute__ ((section ("._secure.text")))
 #define __secure_data __attribute__ ((section ("._secure.data")))
 
-#ifdef CONFIG_ARMV7_SECURE_BASE
+#if defined(CONFIG_ARMV7_SECURE_BASE) || defined(CONFIG_ARMV8_SECURE_BASE)
 /*
  * Warning, horror ahead.
  *
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index b928bd8..9064e6b 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -118,6 +118,17 @@ void smc_call(struct pt_regs *args);
 void __noreturn psci_system_reset(void);
 void __noreturn psci_system_off(void);
 
+#ifdef CONFIG_ARMV8_PSCI
+extern char __secure_start[];
+extern char __secure_end[];
+extern char __secure_stack_start[];
+extern char __secure_stack_end[];
+
+void armv8_setup_psci(void);
+void psci_setup_vectors(void);
+void psci_arch_init(void);
+#endif
+
 #endif	/* __ASSEMBLY__ */
 
 #else /* CONFIG_ARM64 */
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 53c3141..9fe1a5f 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -291,6 +291,9 @@ static void boot_jump_linux(bootm_headers_t *images, int flag)
 	announce_and_cleanup(fake);
 
 	if (!fake) {
+#ifdef CONFIG_ARMV8_PSCI
+		armv8_setup_psci();
+#endif
 		do_nonsec_virt_switch();
 		kernel_entry(images->ft_addr, NULL, NULL, NULL);
 	}
diff --git a/arch/arm/lib/psci-dt.c b/arch/arm/lib/psci-dt.c
index baf6d70..a70f3d3 100644
--- a/arch/arm/lib/psci-dt.c
+++ b/arch/arm/lib/psci-dt.c
@@ -65,7 +65,7 @@ int fdt_psci(void *fdt)
 init_psci_node:
 #ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
 	psci_ver = sec_firmware_support_psci_version();
-#elif defined(CONFIG_ARMV7_PSCI_1_0)
+#elif defined(CONFIG_ARMV7_PSCI_1_0) || defined(CONFIG_ARMV8_PSCI)
 	psci_ver = ARM_PSCI_VER_1_0;
 #endif
 	switch (psci_ver) {
-- 
2.1.4