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authorMichal Simek <michal.simek@xilinx.com>2020-02-11 12:43:14 +0100
committerMichal Simek <michal.simek@xilinx.com>2020-04-06 12:51:30 +0200
commitc51430133718d5ac9c0983c0f9dd4714f02c6184 (patch)
treed6fcbde16c769143d17375c16cf692b5b142e385
parent74bf17db394d49c7041ee01a277fcf8d99b9a514 (diff)
arm64: zynqmp: Print multiboot register value in EL3
Multi boot register can be used for using different boot images and design better boot strategy. Let EL3 SPL or U-Boot to read it and print it. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
-rw-r--r--arch/arm/mach-zynqmp/include/mach/hardware.h4
-rw-r--r--board/xilinx/zynqmp/zynqmp.c14
2 files changed, 17 insertions, 1 deletions
diff --git a/arch/arm/mach-zynqmp/include/mach/hardware.h b/arch/arm/mach-zynqmp/include/mach/hardware.h
index fd361c5ce8..a0acfa2ff1 100644
--- a/arch/arm/mach-zynqmp/include/mach/hardware.h
+++ b/arch/arm/mach-zynqmp/include/mach/hardware.h
@@ -128,7 +128,9 @@ struct apu_regs {
#define ZYNQMP_SILICON_VER_SHIFT 12
struct csu_regs {
- u32 reserved0[17];
+ u32 reserved0[4];
+ u32 multi_boot;
+ u32 reserved1[12];
u32 version;
};
diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 8bdc67748e..ba1a126fbf 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -328,6 +328,17 @@ int board_early_init_f(void)
return ret;
}
+static int multi_boot(void)
+{
+ u32 multiboot;
+
+ multiboot = readl(&csu_base->multi_boot);
+
+ printf("Multiboot:\t%x\n", multiboot);
+
+ return 0;
+}
+
int board_init(void)
{
struct udevice *dev;
@@ -356,6 +367,9 @@ int board_init(void)
}
#endif
+ if (current_el() == 3)
+ multi_boot();
+
return 0;
}