1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm/boards/technexion-pico-hobbit/lowlevel.c b/arch/arm/boards/technexion-pico-hobbit/lowlevel.c
new file mode 100644
index 0000000000..aad55127bf
--- /dev/null
+++ b/arch/arm/boards/technexion-pico-hobbit/lowlevel.c
@@ -0,0 +1,78 @@
+#include <common.h>
+#include <linux/sizes.h>
+#include <mach/generic.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <mach/imx6-regs.h>
+#include <io.h>
+#include <debug_ll.h>
+#include <mach/esdctl.h>
+#include <asm/cache.h>
+#include <asm/sections.h>
+#include <image-metadata.h>
+
+#define MX6_UART6_BASE_ADDR             (MX6_AIPS2_OFF_BASE_ADDR + 0x7C000)
+
+static inline void setup_uart(void)
+{
+	void __iomem *iomuxbase = IOMEM(MX6_IOMUXC_BASE_ADDR);
+	void __iomem *uart = IOMEM(MX6_UART6_BASE_ADDR);
+
+	imx6_ungate_all_peripherals();
+
+	writel(0x8, iomuxbase + 0x1d4);
+	writel(0x1b0b1, iomuxbase + 0x0460);
+	writel(0x8, iomuxbase + 0x1d8);
+	writel(0x1b0b1, iomuxbase + 0x0460);
+
+	imx6_uart_setup(uart);
+	pbl_set_putc(imx_uart_putc, uart);
+
+	putc_ll('>');
+}
+
+static void __noreturn start_imx6_pico_hobbit_common(uint32_t size,
+						bool do_early_uart_config,
+						void *fdt_blob_fixed_offset)
+{
+	void *fdt;
+
+	arm_cpu_lowlevel_init();
+
+	arm_setup_stack(0x00910000 - 8);
+
+	arm_early_mmu_cache_invalidate();
+
+	relocate_to_current_adr();
+	setup_c();
+	barrier();
+
+	if (do_early_uart_config && IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	/* disable all watchdog powerdown counters */
+	writew(0x0, 0x020bc008);
+	writew(0x0, 0x020c0008);
+	writew(0x0, 0x021e4008);
+
+	fdt = fdt_blob_fixed_offset - get_runtime_offset();
+
+	imx6ul_barebox_entry(fdt);
+}
+
+BAREBOX_IMD_TAG_STRING(pico_hobbit_mx6_memsize_SZ_256M, IMD_TYPE_PARAMETER, "memsize=256", 0);
+BAREBOX_IMD_TAG_STRING(pico_hobbit_mx6_memsize_SZ_512M, IMD_TYPE_PARAMETER, "memsize=512", 0);
+
+#define EDM1_ENTRY(name, fdt_name, memory_size, do_early_uart_config)	\
+	ENTRY_FUNCTION(name, r0, r1, r2)				\
+	{								\
+		extern char __dtb_##fdt_name##_start[];			\
+									\
+		IMD_USED(pico_hobbit_mx6_memsize_##memory_size);		\
+									\
+		start_imx6_pico_hobbit_common(memory_size, do_early_uart_config, \
+					 __dtb_##fdt_name##_start);	\
+	}
+
+EDM1_ENTRY(start_imx6ul_pico_hobbit_256mb, imx6ul_pico_hobbit, SZ_256M, true);
+EDM1_ENTRY(start_imx6ul_pico_hobbit_512mb, imx6ul_pico_hobbit, SZ_512M, true);