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https://gitlab.rtems.org/rtems/rtos/rtems.git
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2a81b3e981
* console/uarts.c, include/bsp.h, start/start.S, startup/bspstart.c, startup/exit.c, startup/linkcmds: Correct license URL and/or fix mistake in copyright notice. Both of these mistakes appear to be from code submitted after these changes were made previously.
207 lines
6.9 KiB
C
207 lines
6.9 KiB
C
/*
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* Cogent CSB337 - AT91RM9200 Startup code
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*
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* Copyright (c) 2004 by Cogent Computer Systems
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* Written by Jay Monkman <jtm@lopingdog.com>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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*
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* http://www.rtems.com/license/LICENSE.
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*
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*
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* $Id$
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*/
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#include <bsp.h>
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#include <rtems/libcsupport.h>
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#include <rtems/libio.h>
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#include <at91rm9200.h>
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#include <at91rm9200_pmc.h>
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#include <at91rm9200_emac.h>
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/* Global Variables */
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extern void *_flash_size;
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extern void *_flash_base;
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extern void *_sdram_size;
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extern void *_sdram_base;
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extern void *_bss_free_start;
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unsigned long free_mem_start;
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unsigned long free_mem_end;
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rtems_configuration_table BSP_Configuration;
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rtems_cpu_table Cpu_table;
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char *rtems_progname = "RTEMS";
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/* Function prototypes */
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extern void rtems_irq_mngt_init(void);
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void bsp_libc_init( void *, uint32_t, int );
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void bsp_postdriver_hook(void);
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static void fix_mac_addr();
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/**************************************************************************/
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/* */
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/* NAME: bsp_pretasking_hook - Function to setup system before startup */
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/* */
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/* DESCRIPTION: */
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/* This function is called before drivers are initialized and used */
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/* to setup libc and BSP extensions. */
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/* */
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/* RESTRICTIONS/LIMITATIONS: */
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/* Since this function is setting up libc, it cannot use and libc */
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/* functions. */
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/* */
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/**************************************************************************/
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void bsp_pretasking_hook(void)
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{
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uint32_t heap_start;
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uint32_t heap_size;
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/*
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* Set up the heap.
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*/
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heap_start = free_mem_start;
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heap_size = free_mem_end - free_mem_start;
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/* call rtems lib init - malloc stuff */
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bsp_libc_init((void *)heap_start, heap_size, 0);
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#ifdef RTEMS_DEBUG
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rtems_debug_enable(RTEMS_DEBUG_ALL_MASK);
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#endif /* RTEMS_DEBUG */
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}
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/**************************************************************************/
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/* */
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/* NAME: bsp_start_default - BSP initialization function */
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/* */
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/* DESCRIPTION: */
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/* This function is called before RTEMS is initialized and used */
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/* adjust the kernel's configuration. */
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/* */
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/* This function also configures the CPU's memory protection unit. */
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/* */
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/* RESTRICTIONS/LIMITATIONS: */
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/* Since RTEMS is not configured, no RTEMS functions can be called. */
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/* */
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/**************************************************************************/
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void bsp_start_default( void )
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{
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/* disable interrupts */
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AIC_CTL_REG(AIC_IDCR) = 0xffffffff;
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/*
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* Some versions of the bootloader have the MAC address
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* reversed. This fixes it, if necessary.
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*/
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fix_mac_addr();
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/* tell RTEMS about the hooks we are using */
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Cpu_table.pretasking_hook = bsp_pretasking_hook;
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Cpu_table.postdriver_hook = bsp_postdriver_hook;
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/* tell RTEMS to clear the workspace */
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Cpu_table.do_zero_of_workspace = TRUE;
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/* Place RTEMS workspace at beginning of free memory. */
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BSP_Configuration.work_space_start = (void *)&_bss_free_start;
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free_mem_start = ((uint32_t)&_bss_free_start +
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BSP_Configuration.work_space_size);
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free_mem_end = ((uint32_t)&_sdram_base + (uint32_t)&_sdram_size);
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/*
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* Init rtems exceptions management
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*/
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rtems_exception_init_mngt();
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/*
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* Init rtems interrupt management
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*/
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rtems_irq_mngt_init();
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/*
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* The following information is very useful when debugging.
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*/
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#if 0
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printk( "work_space_size = 0x%x\n\r",
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BSP_Configuration.work_space_size );
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printk( "maximum_extensions = 0x%x\n\r",
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BSP_Configuration.maximum_extensions );
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printk( "microseconds_per_tick = 0x%x\n\r",
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BSP_Configuration.microseconds_per_tick );
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printk( "ticks_per_timeslice = 0x%x\n\r",
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BSP_Configuration.ticks_per_timeslice );
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printk( "maximum_devices = 0x%x\n\r",
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BSP_Configuration.maximum_devices );
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printk( "number_of_device_drivers = 0x%x\n\r",
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BSP_Configuration.number_of_device_drivers );
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printk( "Device_driver_table = 0x%x\n\r",
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BSP_Configuration.Device_driver_table );
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printk( "work_space_start = 0x%x\n\r",
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BSP_Configuration.work_space_start );
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printk( "work_space_size = 0x%x\n\r",
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BSP_Configuration.work_space_size );
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#endif
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} /* bsp_start */
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/*
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* Some versions of the bootloader shipped with the CSB337
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* reverse the MAC address. This function tests for that,
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* and fixes the MAC address.
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*/
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static void fix_mac_addr()
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{
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uint8_t addr[6];
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/* Read the MAC address */
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addr[0] = (EMAC_REG(EMAC_SA1L) >> 0) & 0xff;
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addr[1] = (EMAC_REG(EMAC_SA1L) >> 8) & 0xff;
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addr[2] = (EMAC_REG(EMAC_SA1L) >> 16) & 0xff;
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addr[3] = (EMAC_REG(EMAC_SA1L) >> 24) & 0xff;
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addr[4] = (EMAC_REG(EMAC_SA1H) >> 0) & 0xff;
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addr[5] = (EMAC_REG(EMAC_SA1H) >> 8) & 0xff;
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/* Check which 3 bytes have Cogent's OUI */
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if ((addr[5] == 0x00) && (addr[4] == 0x23) && (addr[3] == 0x31)) {
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EMAC_REG(EMAC_SA1L) = ((addr[5] << 0) |
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(addr[4] << 8) |
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(addr[3] << 16) |
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(addr[2] << 24));
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EMAC_REG(EMAC_SA1H) = ((addr[1] << 0) |
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(addr[0] << 8));
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}
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}
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/*
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* By making this a weak alias for bsp_start_default, a brave soul
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* can override the actual bsp_start routine used.
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*/
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void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default")));
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/**
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* Reset the system.
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*
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* This functions enables the watchdog and waits for it to
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* fire, thus resetting the system.
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*/
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void bsp_reset(void)
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{
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rtems_interrupt_level level;
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_CPU_ISR_Disable(level);
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/* Enable the watchdog timer, then wait for the world to end. */
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ST_REG(ST_WDMR) = ST_WDMR_RSTEN | 1;
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while(1);
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}
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