[PATCHv2] arm64: zynqmp: Print the secure boot status information

[Jorge Ramirez-Ortiz]

Output the secure boot configuration to the console.

Signed-off-by: Jorge Ramirez-Ortiz <jo...@foundries.io>
---

 v2:
   Michal review 12 Aug 2021
     print information on SPL and UBOOT
     improve the print command
     add macros to mask the status
   
 arch/arm/mach-zynqmp/include/mach/hardware.h |  6 +++++-
 board/xilinx/zynqmp/zynqmp.c                 | 14 ++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-zynqmp/include/mach/hardware.h 
b/arch/arm/mach-zynqmp/include/mach/hardware.h
index eebf38551c..c6b1464a9f 100644
--- a/arch/arm/mach-zynqmp/include/mach/hardware.h
+++ b/arch/arm/mach-zynqmp/include/mach/hardware.h
@@ -141,8 +141,12 @@ struct apu_regs {
 #define ZYNQMP_SILICON_VER_MASK                0xF
 #define ZYNQMP_SILICON_VER_SHIFT       0
 
+#define ZYNQMP_CSU_STATUS_AUTHENTICATED        BIT(0)
+#define ZYNQMP_CSU_STATUS_ENCRYPTED    BIT(1)
+
 struct csu_regs {
-       u32 reserved0[4];
+       u32 status;
+       u32 reserved0[3];
        u32 multi_boot;
        u32 reserved1[11];
        u32 idcode;
diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 000a7cde8d..3e7ca2e9c6 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -358,6 +358,18 @@ static int multi_boot(void)
        return multiboot;
 }
 
+static void print_secure_boot(void)
+{
+       u32 status = 0;
+
+       if (zynqmp_mmio_read((ulong)&csu_base->status, &status))
+               return;
+
+       printf("Secure Boot:\t%sauthenticated, %sencrypted\n",
+              status & ZYNQMP_CSU_STATUS_AUTHENTICATED ? "" : "not ",
+              status & ZYNQMP_CSU_STATUS_ENCRYPTED ? "" : "not ");
+}
+
 #define PS_SYSMON_ANALOG_BUS_VAL       0x3210
 #define PS_SYSMON_ANALOG_BUS_REG       0xFFA50914
 
@@ -394,6 +406,8 @@ int board_init(void)
        fpga_add(fpga_xilinx, &zynqmppl);
 #endif
 
+       /* display secure boot information */
+       print_secure_boot();
        if (current_el() == 3)
                printf("Multiboot:\t%d\n", multi_boot());
 
-- 
2.31.1