[bsp][sam9260] Optimize code
1. Cleanup unused code in startup.c. 2. Init MMU before init INT contoroller for mapping vector table to visual address 0x0 3. Remove unused section in link scripts.
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ardafu
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49fa5c44d7
commit
dc3bd14c2a
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@ -29,16 +29,6 @@
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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#endif
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extern void rt_hw_interrupt_init(void);
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extern void rt_hw_board_init(void);
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extern void rt_system_timer_init(void);
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extern void rt_system_scheduler_init(void);
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extern void rt_thread_idle_init(void);
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extern void mmu_invalidate_icache();
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extern void rt_hw_cpu_icache_enable(void);
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extern void rt_show_version(void);
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extern void rt_system_heap_init(void*, void*);
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extern void rt_hw_finsh_init(void);
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extern void rt_application_init(void);
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/**
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@ -48,65 +38,38 @@ extern void rt_application_init(void);
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/*@{*/
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#if defined(__CC_ARM)
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extern int Image$$ER_ZI$$ZI$$Limit;
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#define HEAP_START ((void*)&Image$$ER_ZI$$ZI$$Limit)
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#define HEAP_BEGIN (&Image$$ER_ZI$$ZI$$Limit)
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#elif (defined (__GNUC__))
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extern unsigned char __bss_end__;
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#define HEAP_START ((void*)&__bss_end__)
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#define HEAP_BEGIN (&__bss_end__)
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#elif (defined (__ICCARM__))
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#pragma section="HEAP"
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#define HEAP_START (__section_begin("HEAP"))
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#endif
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#define HEAP_END ((void*)0x24000000)
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#ifdef RT_USING_FINSH
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extern void finsh_system_init(void);
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#pragma section=".noinit"
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#define HEAP_BEGIN (__section_end(".noinit"))
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#endif
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#define HEAP_END (0x24000000)
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/**
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* This function will startup RT-Thread RTOS.
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*/
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void rtthread_startup(void)
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static void rtthread_startup(void)
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{
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/* disable interrupt first */
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rt_hw_interrupt_disable();
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/* enable cpu cache */
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rt_hw_cpu_icache_disable();
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mmu_invalidate_icache();
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rt_hw_cpu_icache_enable();
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/* initialize board */
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rt_hw_board_init();
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/* initialize hardware interrupt */
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rt_hw_interrupt_init();
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/* show version */
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rt_show_version();
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/* initialize board */
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rt_hw_board_init();
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/* show version */
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rt_show_version();
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/* initialize tick */
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rt_system_tick_init();
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/* initialize kernel object */
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rt_system_object_init();
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/* initialize timer system */
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rt_system_timer_init();
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/* initialize heap memory system */
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rt_system_heap_init(HEAP_START, HEAP_END);
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#ifdef RT_USING_MODULE
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/* initialize module system*/
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rt_system_module_init();
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#ifdef RT_USING_HEAP
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rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
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#endif
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/* initialize scheduler system */
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rt_system_scheduler_init();
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/* initialize application */
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rt_application_init();
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/* initialize scheduler system */
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rt_system_scheduler_init();
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/* initialize system timer*/
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rt_system_timer_init();
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/* initialize application */
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rt_application_init();
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#ifdef RT_USING_FINSH
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/* initialize finsh */
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@ -115,26 +78,29 @@ void rtthread_startup(void)
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finsh_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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#endif
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/* initialize timer thread */
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rt_system_timer_thread_init();
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/* initialize system timer thread */
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rt_system_timer_thread_init();
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/* initialize idle thread */
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rt_thread_idle_init();
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/* initialize idle thread */
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rt_thread_idle_init();
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/* start scheduler */
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rt_system_scheduler_start();
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/* start scheduler */
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rt_system_scheduler_start();
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/* never reach here */
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return ;
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/* never reach here */
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return ;
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}
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int main(void)
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{
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/* startup RT-Thread RTOS */
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rtthread_startup();
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/* disable interrupt first */
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rt_hw_interrupt_disable();
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return 0;
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/* startup RT-Thread RTOS */
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rtthread_startup();
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return 0;
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}
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/*@}*/
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@ -33,7 +33,7 @@
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*/
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/*@{*/
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extern void rt_hw_interrupt_init(void);
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extern void rt_hw_clock_init(void);
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extern void rt_hw_get_clock(void);
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@ -143,6 +143,10 @@ static void at91sam926x_pit_init(void)
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*/
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void rt_hw_board_init()
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{
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/* initialize mmu */
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rt_hw_mmu_init(at91_mem_desc, sizeof(at91_mem_desc)/sizeof(at91_mem_desc[0]));
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/* initialize hardware interrupt */
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rt_hw_interrupt_init();
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/* initialize the system clock */
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rt_hw_clock_init();
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@ -150,8 +154,7 @@ void rt_hw_board_init()
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rt_hw_uart_init();
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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/* initialize mmu */
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rt_hw_mmu_init(at91_mem_desc, sizeof(at91_mem_desc)/sizeof(at91_mem_desc[0]));
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/* initialize timer0 */
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rt_hw_timer_init();
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@ -1,26 +1,6 @@
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//*****************************************************************************
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//
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// blinky.icf - Linker configuration file for blinky.
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//
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// Copyright (c) 2013-2014 Texas Instruments Incorporated. All rights reserved.
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// Software License Agreement
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//
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// Texas Instruments (TI) is supplying this software for use solely and
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// exclusively on TI's microcontroller products. The software is owned by
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// TI and/or its suppliers, and is protected under applicable copyright
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// laws. You may not combine this software with "viral" open-source
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// software in order to form a larger program.
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//
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// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
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// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
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// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
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// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
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// DAMAGES, FOR ANY REASON WHATSOEVER.
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//
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// This is part of revision 2.1.0.12573 of the DK-TM4C129X Firmware Package.
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//
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//*****************************************************************************
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//------------------------------------------------------------------------------
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// Linker scatter for running in external SDRAM on the AT91SAM9260
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//------------------------------------------------------------------------------
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//
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// Define a memory region that covers the entire 4 GB addressible space of the
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@ -38,12 +18,6 @@ define region FLASH = mem:[from 0x20000000 to 0x207FFFFF];
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//
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define region SRAM = mem:[from 0x20800000 to 0x23FFFFFF];
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//
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// Define a block for the heap. The size should be set to something other
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// than zero if things in the C library that require the heap are used.
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//
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define block HEAP with alignment = 8, size = 0x02000000 { };
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//
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// Indicate that the read/write values should be initialized by copying from
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// flash.
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@ -75,7 +49,7 @@ place at start of SRAM { section VTABLE };
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//
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// Place all read/write items into SRAM.
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//
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place in SRAM { readwrite, block HEAP };
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place in SRAM { readwrite};
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keep { section FSymTab };
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keep { section VSymTab };
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keep { section .rti_fn* };
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@ -1,34 +1,6 @@
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; * ----------------------------------------------------------------------------
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; * ATMEL Microcontroller Software Support
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; * ----------------------------------------------------------------------------
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; * Copyright (c) 2008, Atmel Corporation
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; *
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; * All rights reserved.
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; *
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; * Redistribution and use in source and binary forms, with or without
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; * modification, are permitted provided that the following conditions are met:
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; *
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; * - Redistributions of source code must retain the above copyright notice,
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; * this list of conditions and the disclaimer below.
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; *
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; * Atmel's name may not be used to endorse or promote products derived from
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; * this software without specific prior written permission.
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; *
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; * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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; * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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; * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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; * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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; * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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; * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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; * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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; * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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; * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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; * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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; * ----------------------------------------------------------------------------
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; *------------------------------------------------------------------------------
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; * Linker scatter for running in external SDRAM on the AT91SAM9260
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; *----------------------------------------------------------------------------*/
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;*------------------------------------------------------------------------------
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;* Linker scatter for running in external SDRAM on the AT91SAM9260
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;*----------------------------------------------------------------------------*/
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Load_region 0x20000000 0x00800000
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{
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@ -38,21 +10,31 @@ Load_region 0x20000000 0x00800000
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* (RESET +First)
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.ANY (+RO +RW)
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}
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ARM_LIB_HEAP +0 EMPTY 0x1000
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{
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}
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ARM_LIB_STACK +0 EMPTY 0x1000
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{
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}
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; Application ZI data (.bss)
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ER_ZI +0
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{
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* (+ZI)
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} ; Application ZI data (.bss)
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}
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;Relocate_region 0x200000 0x1000
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;{
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; *.o (VECTOR, +First)
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;}
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ARM_LIB_HEAP 0x21FFE000 EMPTY 0x1000
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{
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}
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ARM_LIB_STACK 0x22000000 EMPTY -0x1000
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{
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}
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;ARM_LIB_HEAP 0x21FFE000 EMPTY 0x1000
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;{
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;}
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;ARM_LIB_STACK 0x22000000 EMPTY -0x1000
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;{
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;}
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}
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