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 ---
arch/arm/mach-zynqmp/include/mach/hardware.h | 4 +++- board/xilinx/zynqmp/zynqmp.c | 14 ++++++++++++++ 2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-zynqmp/include/mach/hardware.h b/arch/arm/mach-zynqmp/include/mach/hardware.h index fd361c5ce8a5..a0acfa2ff1ed 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 6b0451913db8..8d3613147162 100644 --- a/board/xilinx/zynqmp/zynqmp.c +++ b/board/xilinx/zynqmp/zynqmp.c @@ -329,6 +329,17 @@ 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; @@ -357,6 +368,9 @@ int board_init(void) } #endif
+ if (current_el() == 3) + multi_boot(); + return 0; }