+++ /dev/null
-/*
- * Memory Setup stuff - taken from blob memsetup.S
- *
- * 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 Samsung SMDK2410 by
- * (C) Copyright 2002
- * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
- *
- * (C) Copyright 2008
- * Guennadi Liakhovetki, DENX Software Engineering, <lg@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>
-#include <version.h>
-
-#include <asm/arch/s3c6400.h>
-
-#ifdef CONFIG_SERIAL1
-#define ELFIN_UART_CONSOLE_BASE (ELFIN_UART_BASE + ELFIN_UART0_OFFSET)
-#elif defined(CONFIG_SERIAL2)
-#define ELFIN_UART_CONSOLE_BASE (ELFIN_UART_BASE + ELFIN_UART1_OFFSET)
-#else
-#define ELFIN_UART_CONSOLE_BASE (ELFIN_UART_BASE + ELFIN_UART2_OFFSET)
-#endif
-
-_TEXT_BASE:
- .word CONFIG_SYS_TEXT_BASE
-
- .globl lowlevel_init
-lowlevel_init:
- mov r12, lr
-
- /* LED on only #8 */
- ldr r0, =ELFIN_GPIO_BASE
- ldr r1, =0x55540000
- str r1, [r0, #GPNCON_OFFSET]
-
- ldr r1, =0x55555555
- str r1, [r0, #GPNPUD_OFFSET]
-
- ldr r1, =0xf000
- str r1, [r0, #GPNDAT_OFFSET]
-
- /* Disable Watchdog */
- ldr r0, =0x7e000000 @0x7e004000
- orr r0, r0, #0x4000
- mov r1, #0
- str r1, [r0]
-
- /* External interrupt pending clear */
- ldr r0, =(ELFIN_GPIO_BASE+EINTPEND_OFFSET) /*EINTPEND*/
- ldr r1, [r0]
- str r1, [r0]
-
- ldr r0, =ELFIN_VIC0_BASE_ADDR @0x71200000
- ldr r1, =ELFIN_VIC1_BASE_ADDR @0x71300000
-
- /* Disable all interrupts (VIC0 and VIC1) */
- mvn r3, #0x0
- str r3, [r0, #oINTMSK]
- str r3, [r1, #oINTMSK]
-
- /* Set all interrupts as IRQ */
- mov r3, #0x0
- str r3, [r0, #oINTMOD]
- str r3, [r1, #oINTMOD]
-
- /* Pending Interrupt Clear */
- mov r3, #0x0
- str r3, [r0, #oVECTADDR]
- str r3, [r1, #oVECTADDR]
-
- /* init system clock */
- bl system_clock_init
-
-#ifndef CONFIG_NAND_SPL
- /* for UART */
- bl uart_asm_init
-#endif
-
-#ifdef CONFIG_BOOT_NAND
- /* simple init for NAND */
- bl nand_asm_init
-#endif
-
- /* Memory subsystem address 0x7e00f120 */
- ldr r0, =ELFIN_MEM_SYS_CFG
-
- /* Xm0CSn2 = NFCON CS0, Xm0CSn3 = NFCON CS1 */
- mov r1, #S3C64XX_MEM_SYS_CFG_NAND
- str r1, [r0]
-
- bl mem_ctrl_asm_init
-
-/* Wakeup support. Don't know if it's going to be used, untested. */
- ldr r0, =(ELFIN_CLOCK_POWER_BASE + RST_STAT_OFFSET)
- ldr r1, [r0]
- bic r1, r1, #0xfffffff7
- cmp r1, #0x8
- beq wakeup_reset
-
-1:
- mov lr, r12
- mov pc, lr
-
-wakeup_reset:
-
- /* Clear wakeup status register */
- ldr r0, =(ELFIN_CLOCK_POWER_BASE + WAKEUP_STAT_OFFSET)
- ldr r1, [r0]
- str r1, [r0]
-
- /* LED test */
- ldr r0, =ELFIN_GPIO_BASE
- ldr r1, =0x3000
- str r1, [r0, #GPNDAT_OFFSET]
-
- /* Load return address and jump to kernel */
- ldr r0, =(ELFIN_CLOCK_POWER_BASE + INF_REG0_OFFSET)
- /* r1 = physical address of s3c6400_cpu_resume function */
- ldr r1, [r0]
- /* Jump to kernel (sleep-s3c6400.S) */
- mov pc, r1
- nop
- nop
-/*
- * system_clock_init: Initialize core clock and bus clock.
- * void system_clock_init(void)
- */
-system_clock_init:
- ldr r0, =ELFIN_CLOCK_POWER_BASE /* 0x7e00f000 */
-
-#ifdef CONFIG_SYNC_MODE
- ldr r1, [r0, #OTHERS_OFFSET]
- mov r2, #0x40
- orr r1, r1, r2
- str r1, [r0, #OTHERS_OFFSET]
-
- nop
- nop
- nop
- nop
- nop
-
- ldr r2, =0x80
- orr r1, r1, r2
- str r1, [r0, #OTHERS_OFFSET]
-
-check_syncack:
- ldr r1, [r0, #OTHERS_OFFSET]
- ldr r2, =0xf00
- and r1, r1, r2
- cmp r1, #0xf00
- bne check_syncack
-#else /* ASYNC Mode */
- nop
- nop
- nop
- nop
- nop
-
- /*
- * This was unconditional in original Samsung sources, but it doesn't
- * seem to make much sense on S3C6400.
- */
-#ifndef CONFIG_S3C6400
- ldr r1, [r0, #OTHERS_OFFSET]
- bic r1, r1, #0xC0
- orr r1, r1, #0x40
- str r1, [r0, #OTHERS_OFFSET]
-
-wait_for_async:
- ldr r1, [r0, #OTHERS_OFFSET]
- and r1, r1, #0xf00
- cmp r1, #0x0
- bne wait_for_async
-#endif
-
- ldr r1, [r0, #OTHERS_OFFSET]
- bic r1, r1, #0x40
- str r1, [r0, #OTHERS_OFFSET]
-#endif
-
- mov r1, #0xff00
- orr r1, r1, #0xff
- str r1, [r0, #APLL_LOCK_OFFSET]
- str r1, [r0, #MPLL_LOCK_OFFSET]
-
- /* Set Clock Divider */
- ldr r1, [r0, #CLK_DIV0_OFFSET]
- bic r1, r1, #0x30000
- bic r1, r1, #0xff00
- bic r1, r1, #0xff
- ldr r2, =CLK_DIV_VAL
- orr r1, r1, r2
- str r1, [r0, #CLK_DIV0_OFFSET]
-
- ldr r1, =APLL_VAL
- str r1, [r0, #APLL_CON_OFFSET]
- ldr r1, =MPLL_VAL
- str r1, [r0, #MPLL_CON_OFFSET]
-
- /* FOUT of EPLL is 96MHz */
- ldr r1, =0x200203
- str r1, [r0, #EPLL_CON0_OFFSET]
- ldr r1, =0x0
- str r1, [r0, #EPLL_CON1_OFFSET]
-
- /* APLL, MPLL, EPLL select to Fout */
- ldr r1, [r0, #CLK_SRC_OFFSET]
- orr r1, r1, #0x7
- str r1, [r0, #CLK_SRC_OFFSET]
-
- /* wait at least 200us to stablize all clock */
- mov r1, #0x10000
-1: subs r1, r1, #1
- bne 1b
-
- /* Synchronization for VIC port */
-#if defined(CONFIG_SYNC_MODE)
- ldr r1, [r0, #OTHERS_OFFSET]
- orr r1, r1, #0x20
- str r1, [r0, #OTHERS_OFFSET]
-#elif !defined(CONFIG_S3C6400)
- /* According to 661558um_S3C6400X_rev10.pdf 0x20 is reserved */
- ldr r1, [r0, #OTHERS_OFFSET]
- bic r1, r1, #0x20
- str r1, [r0, #OTHERS_OFFSET]
-#endif
- mov pc, lr
-
-
-#ifndef CONFIG_NAND_SPL
-/*
- * uart_asm_init: Initialize UART's pins
- */
-uart_asm_init:
- /* set GPIO to enable UART */
- ldr r0, =ELFIN_GPIO_BASE
- ldr r1, =0x220022
- str r1, [r0, #GPACON_OFFSET]
- mov pc, lr
-#endif
-
-#ifdef CONFIG_BOOT_NAND
-/*
- * NAND Interface init for SMDK6400
- */
-nand_asm_init:
- ldr r0, =ELFIN_NAND_BASE
- ldr r1, [r0, #NFCONF_OFFSET]
- orr r1, r1, #0x70
- orr r1, r1, #0x7700
- str r1, [r0, #NFCONF_OFFSET]
-
- ldr r1, [r0, #NFCONT_OFFSET]
- orr r1, r1, #0x07
- str r1, [r0, #NFCONT_OFFSET]
-
- mov pc, lr
-#endif
-
-#ifdef CONFIG_ENABLE_MMU
-/*
- * MMU Table for SMDK6400
- */
-
- /* form a first-level section entry */
-.macro FL_SECTION_ENTRY base,ap,d,c,b
- .word (\base << 20) | (\ap << 10) | \
- (\d << 5) | (1<<4) | (\c << 3) | (\b << 2) | (1<<1)
-.endm
-
-.section .mmudata, "a"
- .align 14
- /* the following alignment creates the mmu table at address 0x4000. */
- .globl mmu_table
-mmu_table:
- .set __base, 0
- /* 1:1 mapping for debugging */
- .rept 0xA00
- FL_SECTION_ENTRY __base, 3, 0, 0, 0
- .set __base, __base + 1
- .endr
-
- /* access is not allowed. */
- .rept 0xC00 - 0xA00
- .word 0x00000000
- .endr
-
- /* 128MB for SDRAM 0xC0000000 -> 0x50000000 */
- .set __base, 0x500
- .rept 0xC80 - 0xC00
- FL_SECTION_ENTRY __base, 3, 0, 1, 1
- .set __base, __base + 1
- .endr
-
- /* access is not allowed. */
- .rept 0x1000 - 0xc80
- .word 0x00000000
- .endr
-#endif
projects / karo-tx-uboot.git / blobdiff