1 files changed, 73 insertions, 0 deletions
diff --git a/arch/mips/boards/netgear-wg102/lowlevel.S b/arch/mips/boards/netgear-wg102/lowlevel.S
new file mode 100644
index 0000000000..e48dded269
--- /dev/null
+++ b/arch/mips/boards/netgear-wg102/lowlevel.S
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2013 Antony Pavlov <antonynpavlov@gmail.com>
+ * Copyright (C) 2013 Oleksij Rempel <linux@rempel-privat.de>
+ */
+
+#define BOARD_PBL_START start_netgear_wg102
+
+#include <asm/pbl_macros.h>
+#include <mach/pbl_macros.h>
+#include <mach/ar2312_regs.h>
+
+#include <mach/debug_ll.h>
+
+ENTRY_FUNCTION(BOARD_PBL_START)
+
+	mips_barebox_10h
+
+	mips_disable_interrupts
+
+	pbl_ar2312_pll
+
+	pbl_ar2312_rst_uart0
+	debug_ll_ns16550_init
+
+	debug_ll_outc 'a'
+	debug_ll_ns16550_outnl
+
+	/* check if SDRAM is already configured,
+	 * if yes, we are probably starting
+	 * as second stage loader and can skip configuration */
+	la	t0, KSEG1 | AR2312_MEM_CFG1
+	lw	t1, 0(t0)
+	and	t0, t1, MEM_CFG1_E0
+	beq	zero, t0, 1f
+	 nop
+
+	pbl_probe_mem t0, t1, KSEG1
+	beq t0, t1, sdram_configured
+	 nop
+
+1:
+	/* start SDRAM configuration */
+	pbl_ar2312_x16_sdram
+
+	/* check one more time. if some thing wrong,
+	 * we don't need to continue */
+	pbl_probe_mem t0, t1, KSEG1
+	beq t0, t1, sdram_configured
+	 nop
+	debug_ll_outc '#'
+	debug_ll_ns16550_outnl
+
+1:
+	b	1b /* dead end */
+	 nop
+
+sdram_configured:
+	debug_ll_outc 'b'
+	debug_ll_ns16550_outnl
+
+	copy_to_link_location	BOARD_PBL_START;
+	stack_setup;
+
+	lw	a0, 0;
+	la	v0, pbl_main_entry;
+	jal	v0;
+	 nop;
+
+	/* No return */
+__error:
+	b	__error;
+	 nop;