diff options
Diffstat (limited to 'roms/u-boot/arch/arm/cpu/arm920t/ep93xx/lowlevel_init.S')
| -rw-r--r-- | roms/u-boot/arch/arm/cpu/arm920t/ep93xx/lowlevel_init.S | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/cpu/arm920t/ep93xx/lowlevel_init.S b/roms/u-boot/arch/arm/cpu/arm920t/ep93xx/lowlevel_init.S new file mode 100644 index 00000000..bf2fa2ac --- /dev/null +++ b/roms/u-boot/arch/arm/cpu/arm920t/ep93xx/lowlevel_init.S @@ -0,0 +1,49 @@ +/* + * Low-level initialization for EP93xx + * + * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net> + * + * Copyright (C) 2006 Dominic Rath <Dominic.Rath@gmx.de> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <version.h> +#include <asm/arch/ep93xx.h> + +.globl lowlevel_init +lowlevel_init: + /* backup return address */ + ldr r1, =SYSCON_SCRATCH0 + str lr, [r1] + + /* Turn on both LEDs */ + bl red_led_on + bl green_led_on + + /* Configure flash wait states before we switch to the PLL */ + bl flash_cfg + + /* Set up PLL */ + bl pll_cfg + + /* Turn off the Green LED and leave the Red LED on */ + bl green_led_off + + /* Setup SDRAM */ + bl sdram_cfg + + /* Turn on Green LED, Turn off the Red LED */ + bl green_led_on + bl red_led_off + + /* FIXME: we use async mode for now */ + mrc p15, 0, r0, c1, c0, 0 + orr r0, r0, #0xc0000000 + mcr p15, 0, r0, c1, c0, 0 + + /* restore return address */ + ldr r1, =SYSCON_SCRATCH0 + ldr lr, [r1] + + mov pc, lr |