diff options
Diffstat (limited to 'cpu/arm920t/at91/lowlevel_init.S')
| -rw-r--r-- | cpu/arm920t/at91/lowlevel_init.S | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/cpu/arm920t/at91/lowlevel_init.S b/cpu/arm920t/at91/lowlevel_init.S deleted file mode 100644 index 22fc86c..0000000 --- a/cpu/arm920t/at91/lowlevel_init.S +++ /dev/null @@ -1,164 +0,0 @@ -/* - * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) and - * Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl) - * - * Modified for the at91rm9200dk board by - * (C) Copyright 2004 - * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <config.h> - -#ifndef CONFIG_SKIP_LOWLEVEL_INIT - -#include <asm/arch/hardware.h> -#include <asm/arch/at91_mc.h> -#include <asm/arch/at91_pmc.h> -#include <asm/arch/at91_pio.h> - -#define ARM920T_CONTROL 0xC0000000 /* @ set bit 31 (iA) and 30 (nF) */ - -_MTEXT_BASE: -#undef START_FROM_MEM -#ifdef START_FROM_MEM - .word TEXT_BASE-PHYS_FLASH_1 -#else - .word TEXT_BASE -#endif - -.globl lowlevel_init -lowlevel_init: - ldr r1, =AT91_ASM_PMC_MOR - /* Main oscillator Enable register */ -#ifdef CONFIG_SYS_USE_MAIN_OSCILLATOR - ldr r0, =0x0000FF01 /* Enable main oscillator */ -#else - ldr r0, =0x0000FF00 /* Disable main oscillator */ -#endif - str r0, [r1] /*AT91C_CKGR_MOR] */ - /* Add loop to compensate Main Oscillator startup time */ - ldr r0, =0x00000010 -LoopOsc: - subs r0, r0, #1 - bhi LoopOsc - - /* memory control configuration */ - /* this isn't very elegant, but what the heck */ - ldr r0, =SMRDATA - ldr r1, _MTEXT_BASE - sub r0, r0, r1 - add r2, r0, #80 -pllloop: - /* the address */ - ldr r1, [r0], #4 - /* the value */ - ldr r3, [r0], #4 - str r3, [r1] - cmp r2, r0 - bne pllloop - /* delay - this is all done by guess */ - ldr r0, =0x00010000 - /* (vs reading PMC_SR for LOCKA, LOCKB ... or MOSCS earlier) */ -lock: - subs r0, r0, #1 - bhi lock - ldr r0, =SMRDATA1 - ldr r1, _MTEXT_BASE - sub r0, r0, r1 - add r2, r0, #176 -sdinit: - /* the address */ - ldr r1, [r0], #4 - /* the value */ - ldr r3, [r0], #4 - str r3, [r1] - cmp r2, r0 - bne sdinit - - /* switch from FastBus to Asynchronous clock mode */ - mrc p15, 0, r0, c1, c0, 0 - orr r0, r0, #ARM920T_CONTROL - mcr p15, 0, r0, c1, c0, 0 - - /* everything is fine now */ - mov pc, lr - - .ltorg - -SMRDATA: - .word AT91_ASM_MC_EBI_CFG - .word CONFIG_SYS_EBI_CFGR_VAL - .word AT91_ASM_MC_SMC_CSR0 - .word CONFIG_SYS_SMC_CSR0_VAL - .word AT91_ASM_PMC_PLLAR - .word CONFIG_SYS_PLLAR_VAL - .word AT91_ASM_PMC_PLLBR - .word CONFIG_SYS_PLLBR_VAL - .word AT91_ASM_PMC_MCKR - .word CONFIG_SYS_MCKR_VAL - /* here there's a delay */ -SMRDATA1: - .word AT91_ASM_PIOC_ASR - .word CONFIG_SYS_PIOC_ASR_VAL - .word AT91_ASM_PIOC_BSR - .word CONFIG_SYS_PIOC_BSR_VAL - .word AT91_ASM_PIOC_PDR - .word CONFIG_SYS_PIOC_PDR_VAL - .word AT91_ASM_MC_EBI_CSA - .word CONFIG_SYS_EBI_CSA_VAL - .word AT91_ASM_MC_SDRAMC_CR - .word CONFIG_SYS_SDRC_CR_VAL - .word AT91_ASM_MC_SDRAMC_MR - .word CONFIG_SYS_SDRC_MR_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word AT91_ASM_MC_SDRAMC_MR - .word CONFIG_SYS_SDRC_MR_VAL1 - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word AT91_ASM_MC_SDRAMC_MR - .word CONFIG_SYS_SDRC_MR_VAL2 - .word CONFIG_SYS_SDRAM1 - .word CONFIG_SYS_SDRAM_VAL - .word AT91_ASM_MC_SDRAMC_TR - .word CONFIG_SYS_SDRC_TR_VAL - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - .word AT91_ASM_MC_SDRAMC_MR - .word CONFIG_SYS_SDRC_MR_VAL3 - .word CONFIG_SYS_SDRAM - .word CONFIG_SYS_SDRAM_VAL - /* SMRDATA1 is 176 bytes long */ -#endif /* CONFIG_SKIP_LOWLEVEL_INIT */ |