diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-flash.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-flash.S | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-flash.S b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-flash.S deleted file mode 100644 index 9c87d38a83..0000000000 --- a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-flash.S +++ /dev/null @@ -1,139 +0,0 @@ -/** - * @file - * - * @ingroup mpc55xx_asm - * - * @brief Flash configuration. - */ - -/* - * Copyright (c) 2008-2015 embedded brains GmbH. All rights reserved. - * - * embedded brains GmbH - * Dornierstr. 4 - * 82178 Puchheim - * Germany - * <rtems@embedded-brains.de> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <libcpu/powerpc-utility.h> -#include <mpc55xx/reg-defs.h> - - .section ".bsp_start_text", "ax" - -#if MPC55XX_CHIP_FAMILY == 551 - -/* MPC5510 Microcontroller Family Data Sheet, Rev. 3, Table 16, Num 7 */ -.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 -.equ FLASH_SETTINGS_2, FLASH_BUICR_CPU_PREFTCH | FLASH_BUICR_APC_2 | FLASH_BUICR_RWSC_2 | FLASH_BUICR_WWSC_1 | FLASH_BUICR_DPFEN_1 | FLASH_BUICR_IPFEN_1 | FLASH_BUICR_PFLIM_2 | FLASH_BUICR_BFEN -.equ FLASH_SETTINGS_3, FLASH_SETTINGS_2 - -#else - -/* Optimized flash configurations (Table 13-15 [MPC5567 Microcontroller Reference Manual]) */ -.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 -.equ FLASH_SETTINGS_3, 0x01716B15 - -#endif - -/** - * @fn void mpc55xx_start_flash() - * @brief Optimized flash configuration. - * @warning Code will be copied and executed on the stack. - */ -GLOBAL_FUNCTION mpc55xx_start_flash -#if !defined(MPC55XX_NEEDS_LOW_LEVEL_INIT) \ - || MPC55XX_CHIP_FAMILY == 564 \ - || MPC55XX_CHIP_FAMILY == 566 - blr -#else - .equ stack_size, 20 - .equ lr_offset, 28 - - /* Reserve stack frame */ - stwu r1, -stack_size(r1) - mflr r0 - stw r0, lr_offset(r1) - - /* Flash settings dependent on system clock */ - bl mpc55xx_get_system_clock - LWI r4, FLASH_CLOCK_0 - cmpw r3, r4 - ble clock_0 - LWI r4, FLASH_CLOCK_1 - cmpw r3, r4 - ble clock_1 - LWI r4, FLASH_CLOCK_2 - cmpw r3, r4 - ble clock_2 - LWI r4, FLASH_CLOCK_3 - cmpw r3, r4 - ble clock_3 - - /* - * 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 -clock_1: - LWI r3, FLASH_SETTINGS_1 - b settings_done -clock_2: - LWI r3, FLASH_SETTINGS_2 - b settings_done -clock_3: - LWI r3, FLASH_SETTINGS_3 - b settings_done -settings_done: - - /* Copy store code on the stack */ - LA r4, store_start - lwz r6, 0(r4) - lwz r7, 4(r4) - lwz r8, 8(r4) - stw r6, 8(r1) - stw r7, 12(r1) - stw r8, 16(r1) - - /* Execute store code */ - LA r4, FLASH_BIUCR - addi r5, r1, 8 - mtctr r5 - bctrl - - /* Return */ - lwz r0, lr_offset(r1) - addi r1, r1, stack_size - mtlr r0 - blr - -/* - * Store flash settings - */ - -store_start: - - stw r3, 0(r4) - isync - blr - -#endif |