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bsp/mpc55xx: Fix flash settings

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This commit is contained in:
Sebastian Huber
2015-03-17 11:28:44 +01:00
parent 8c7eb0039c
commit ac8339ae50
1 changed files with 16 additions and 13 deletions
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29
c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-flash.S
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@@ -7,10 +7,10 @@
*/
/*
* Copyright (c) 2008-2014 embedded brains GmbH. All rights reserved.
* Copyright (c) 2008-2015 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
@@ -25,14 +25,12 @@
.section ".bsp_start_text", "ax"
.equ FLASH_SETTINGS_RESET, 0xff00
#if MPC55XX_CHIP_FAMILY == 551
/* MPC5510 Microcontroller Family Data Sheet, Rev. 3, Table 16, Num 7 */
.equ FLASH_CLOCK_0, 25
.equ FLASH_CLOCK_1, 50
.equ FLASH_CLOCK_2, 80
.equ FLASH_CLOCK_0, 25000000
.equ FLASH_CLOCK_1, 50000000
.equ FLASH_CLOCK_2, 80000000
.equ FLASH_CLOCK_3, FLASH_CLOCK_2
.equ FLASH_SETTINGS_0, FLASH_BUICR_CPU_PREFTCH | FLASH_BUICR_APC_0 | FLASH_BUICR_RWSC_0 | FLASH_BUICR_WWSC_1 | FLASH_BUICR_DPFEN_1 | FLASH_BUICR_IPFEN_1 | FLASH_BUICR_PFLIM_2 | FLASH_BUICR_BFEN
.equ FLASH_SETTINGS_1, FLASH_BUICR_CPU_PREFTCH | FLASH_BUICR_APC_1 | FLASH_BUICR_RWSC_1 | FLASH_BUICR_WWSC_1 | FLASH_BUICR_DPFEN_1 | FLASH_BUICR_IPFEN_1 | FLASH_BUICR_PFLIM_2 | FLASH_BUICR_BFEN
@@ -42,10 +40,10 @@
#else
/* Optimized flash configurations (Table 13-15 [MPC5567 Microcontroller Reference Manual]) */
.equ FLASH_CLOCK_0, 82
.equ FLASH_CLOCK_1, 102
.equ FLASH_CLOCK_2, 132
.equ FLASH_CLOCK_3, 264
.equ FLASH_CLOCK_0, 82000000
.equ FLASH_CLOCK_1, 102000000
.equ FLASH_CLOCK_2, 132000000
.equ FLASH_CLOCK_3, 264000000
.equ FLASH_SETTINGS_0, FLASH_BUICR_CPU_PREFTCH | FLASH_BUICR_APC_1 | FLASH_BUICR_RWSC_1 | FLASH_BUICR_WWSC_1 | FLASH_BUICR_DPFEN_3 | FLASH_BUICR_IPFEN_3 | FLASH_BUICR_PFLIM_6 | FLASH_BUICR_BFEN
.equ FLASH_SETTINGS_1, FLASH_BUICR_CPU_PREFTCH | FLASH_BUICR_APC_1 | FLASH_BUICR_RWSC_2 | FLASH_BUICR_WWSC_1 | FLASH_BUICR_DPFEN_3 | FLASH_BUICR_IPFEN_3 | FLASH_BUICR_PFLIM_6 | FLASH_BUICR_BFEN
.equ FLASH_SETTINGS_2, FLASH_BUICR_CPU_PREFTCH | FLASH_BUICR_APC_2 | FLASH_BUICR_RWSC_3 | FLASH_BUICR_WWSC_1 | FLASH_BUICR_DPFEN_3 | FLASH_BUICR_IPFEN_3 | FLASH_BUICR_PFLIM_6 | FLASH_BUICR_BFEN
@@ -86,8 +84,13 @@ GLOBAL_FUNCTION mpc55xx_start_flash
LWI r4, FLASH_CLOCK_3
cmpw r3, r4
ble clock_3
LWI r3, FLASH_SETTINGS_RESET
b settings_done
/*
* In case we don't have the right flash settings for the system clock
* value, then rely on the BAM settings.
*/
blr
clock_0:
LWI r3, FLASH_SETTINGS_0
b settings_done