diff options
Diffstat (limited to 'board/integratorap/lowlevel_init.S')
| -rw-r--r-- | board/integratorap/lowlevel_init.S | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/board/integratorap/lowlevel_init.S b/board/integratorap/lowlevel_init.S deleted file mode 100644 index ab9589c95c..0000000000 --- a/board/integratorap/lowlevel_init.S +++ /dev/null @@ -1,213 +0,0 @@ -/* - * Board specific setup info - * - * (C) Copyright 2004, ARM Ltd. - * Philippe Robin, <philippe.robin@arm.com> - * - * 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> - - /* Reset using CM control register */ -.global reset_cpu -reset_cpu: - mov r0, #CM_BASE - ldr r1,[r0,#OS_CTRL] - orr r1,r1,#CMMASK_RESET - str r1,[r0,#OS_CTRL] - -reset_failed: - b reset_failed - -/* Set up the platform, once the cpu has been initialized */ -.globl lowlevel_init -lowlevel_init: - /* If U-Boot has been run after the ARM boot monitor - * then all the necessary actions have been done - * otherwise we are running from user flash mapped to 0x00000000 - * --- DO NOT REMAP BEFORE THE CODE HAS BEEN RELOCATED -- - * Changes to the (possibly soft) reset defaults of the processor - * itself should be performed in cpu/arm<>/start.S - * This function affects only the core module or board settings - */ - -#ifdef CONFIG_CM_INIT - /* CM has an initialization register - * - bits in it are wired into test-chip pins to force - * reset defaults - * - may need to change its contents for U-Boot - */ - - /* set the desired CM specific value */ - mov r2,#CMMASK_LOWVEC /* Vectors at 0x00000000 for all */ - -#if defined (CONFIG_CM10200E) || defined (CONFIG_CM10220E) - orr r2,r2,#CMMASK_INIT_102 -#else - -#if !defined (CONFIG_CM920T) && !defined (CONFIG_CM920T_ETM) && \ - !defined (CONFIG_CM940T) - -#ifdef CONFIG_CM_MULTIPLE_SSRAM - /* set simple mapping */ - and r2,r2,#CMMASK_MAP_SIMPLE -#endif /* #ifdef CONFIG_CM_MULTIPLE_SSRAM */ - -#ifdef CONFIG_CM_TCRAM - /* disable TCRAM */ - and r2,r2,#CMMASK_TCRAM_DISABLE -#endif /* #ifdef CONFIG_CM_TCRAM */ - -#if defined (CONFIG_CM926EJ_S) || defined (CONFIG_CM1026EJ_S) || \ - defined (CONFIG_CM1136JF_S) - - and r2,r2,#CMMASK_LE - -#endif /* cpu with little endian initialization */ - - orr r2,r2,#CMMASK_CMxx6_COMMON - -#endif /* CMxx6 code */ - -#endif /* ARM102xxE value */ - - /* read CM_INIT */ - mov r0, #CM_BASE - ldr r1, [r0, #OS_INIT] - /* check against desired bit setting */ - and r3,r1,r2 - cmp r3,r2 - beq init_reg_OK - - /* lock for change */ - mov r3, #CMVAL_LOCK1 - add r3,r3,#CMVAL_LOCK2 - str r3, [r0, #OS_LOCK] - /* set desired value */ - orr r1,r1,r2 - /* write & relock CM_INIT */ - str r1, [r0, #OS_INIT] - mov r1, #CMVAL_UNLOCK - str r1, [r0, #OS_LOCK] - - /* soft reset so new values used */ - b reset_cpu - -init_reg_OK: - -#endif /* CONFIG_CM_INIT */ - - mov pc, lr - -#ifdef CONFIG_CM_SPD_DETECT - /* Fast memory is available for the DRAM data - * - ensure it has been transferred, then summarize the data - * into a CM register - */ -.globl dram_query -dram_query: - stmfd r13!,{r4-r6,lr} - /* set up SDRAM info */ - /* - based on example code from the CM User Guide */ - mov r0, #CM_BASE - -readspdbit: - ldr r1, [r0, #OS_SDRAM] /* read the SDRAM register */ - and r1, r1, #0x20 /* mask SPD bit (5) */ - cmp r1, #0x20 /* test if set */ - bne readspdbit - -setupsdram: - add r0, r0, #OS_SPD /* address the copy of the SDP data */ - ldrb r1, [r0, #3] /* number of row address lines */ - ldrb r2, [r0, #4] /* number of column address lines */ - ldrb r3, [r0, #5] /* number of banks */ - ldrb r4, [r0, #31] /* module bank density */ - mul r5, r4, r3 /* size of SDRAM (MB divided by 4) */ - mov r5, r5, ASL#2 /* size in MB */ - mov r0, #CM_BASE /* reload for later code */ - cmp r5, #0x10 /* is it 16MB? */ - bne not16 - mov r6, #0x2 /* store size and CAS latency of 2 */ - b writesize - -not16: - cmp r5, #0x20 /* is it 32MB? */ - bne not32 - mov r6, #0x6 - b writesize - -not32: - cmp r5, #0x40 /* is it 64MB? */ - bne not64 - mov r6, #0xa - b writesize - -not64: - cmp r5, #0x80 /* is it 128MB? */ - bne not128 - mov r6, #0xe - b writesize - -not128: - /* if it is none of these sizes then it is either 256MB, or - * there is no SDRAM fitted so default to 256MB - */ - mov r6, #0x12 - -writesize: - mov r1, r1, ASL#8 /* row addr lines from SDRAM reg */ - orr r2, r1, r2, ASL#12 /* OR in column address lines */ - orr r3, r2, r3, ASL#16 /* OR in number of banks */ - orr r6, r6, r3 /* OR in size and CAS latency */ - str r6, [r0, #OS_SDRAM] /* store SDRAM parameters */ - -#endif /* #ifdef CONFIG_CM_SPD_DETECT */ - - ldmfd r13!,{r4-r6,pc} /* back to caller */ - -#ifdef CONFIG_CM_REMAP - /* CM remap bit is operational - * - use it to map writeable memory at 0x00000000, in place of flash - */ -.globl cm_remap -cm_remap: - stmfd r13!,{r4-r10,lr} - - mov r0, #CM_BASE - ldr r1, [r0, #OS_CTRL] - orr r1, r1, #CMMASK_REMAP /* set remap and led bits */ - str r1, [r0, #OS_CTRL] - - /* Now 0x00000000 is writeable, replace the vectors */ - ldr r0, =_start /* r0 <- start of vectors */ - ldr r2, =_armboot_start /* r2 <- past vectors */ - sub r1,r1,r1 /* destination 0x00000000 */ - -copy_vec: - ldmia r0!, {r3-r10} /* copy from source address [r0] */ - stmia r1!, {r3-r10} /* copy to target address [r1] */ - cmp r0, r2 /* until source end address [r2] */ - ble copy_vec - - ldmfd r13!,{r4-r10,pc} /* back to caller */ - -#endif /* #ifdef CONFIG_CM_REMAP */ |