u-boot/board/imgtec/boston/lowlevel_init.S
Paul Burton ad8783cb1c boston: Introduce support for the MIPS Boston development board
This patch introduces support for building U-Boot to run on the MIPS
Boston development board. This is a board built around an FPGA & an
Intel EG20T Platform Controller Hub, used largely as part of the
development of new CPUs and their software support. It is essentially
the successor to the older MIPS Malta board.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2016-09-21 16:24:36 +02:00

56 lines
822 B
ArmAsm

/*
* Copyright (C) 2016 Imagination Technologies
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <config.h>
#include <asm/addrspace.h>
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include "boston-regs.h"
.data
msg_ddr_cal: .ascii "DDR Cal "
msg_ddr_ok: .ascii "DDR OK "
.text
LEAF(lowlevel_init)
move s0, ra
PTR_LA a0, msg_ddr_cal
bal lowlevel_display
PTR_LI t0, BOSTON_PLAT_DDR3STAT
1: lw t1, 0(t0)
andi t1, t1, BOSTON_PLAT_DDR3STAT_CALIB
beqz t1, 1b
PTR_LA a0, msg_ddr_ok
bal lowlevel_display
move v0, zero
jr s0
END(lowlevel_init)
LEAF(lowlevel_display)
.set push
.set noat
PTR_LI AT, BOSTON_LCD_BASE
#ifdef CONFIG_64BIT
ld k1, 0(a0)
sd k1, 0(AT)
#else
lw k1, 0(a0)
sw k1, 0(AT)
lw k1, 4(a0)
sw k1, 4(AT)
#endif
.set pop
1: jr ra
END(lowlevel_display)