diff options
| author | Ralf Corsepius <ralf.corsepius@rtems.org> | 2007-04-25 13:13:54 +0000 |
|---|---|---|
| committer | Ralf Corsepius <ralf.corsepius@rtems.org> | 2007-04-25 13:13:54 +0000 |
| commit | 4f181b36cff3d0a9c350b223dd0cf9fc1301bab6 (patch) | |
| tree | 283ed829b5c85bf8ad2ca8091a26175fec053aec /c/src/lib/libbsp/arm/rtl22xx/startup/bspstart.c | |
| parent | 2007-04-25 Ralf Corsépius <ralf.corsepius@rtems.org> (diff) | |
| download | rtems-4f181b36cff3d0a9c350b223dd0cf9fc1301bab6.tar.bz2 | |
2007-04-25 Ray Xu <xr@trasin.net>
* include/tm27.h, startup/bspstart.c, startup/exit.c,
startup/linkcmds: New (Initial submission).
Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/libbsp/arm/rtl22xx/startup/bspstart.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/rtl22xx/startup/bspstart.c b/c/src/lib/libbsp/arm/rtl22xx/startup/bspstart.c new file mode 100644 index 0000000000..ef5877a604 --- /dev/null +++ b/c/src/lib/libbsp/arm/rtl22xx/startup/bspstart.c @@ -0,0 +1,284 @@ +/*
+ * LPC22XX Startup code
+ *
+ * Copyright (c) 2005 by Ray X <rayx.cn@gmail.com>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ *
+ * http://www.rtems.com/license/LICENSE.
+ *
+ *
+ * $Id$
+*/
+
+#include <bsp.h>
+#include <rtems/libcsupport.h>
+#include <rtems/libio.h>
+#include <lpc22xx.h>
+
+
+/*************************************************************/
+/* Macros */
+/*************************************************************/
+
+/*************************************************************/
+/* Data Structures */
+/*************************************************************/
+
+/*************************************************************/
+/* Global Variables */
+/*************************************************************/
+/*FIX ME:we do not have SDRAM, but can I define mutiple SRAM?*/
+
+extern void *_flash_size;
+extern void *_flash_base;
+extern void *_sdram_size;
+extern void *_sdram_base;
+extern void *_bss_free_start;
+extern void *_bss_start_;
+extern void *_bss_end_;
+
+
+unsigned long free_mem_start;
+unsigned long free_mem_end;
+
+/* The original BSP configuration table from the application and our copy of it
+ with some changes. */
+
+extern rtems_configuration_table Configuration;
+rtems_configuration_table BSP_Configuration;
+
+rtems_cpu_table Cpu_table; /* CPU configuration table. */
+char *rtems_progname; /* Program name - from main(). */
+
+/*************************************************************/
+/* Function prototypes */
+/*************************************************************/
+extern void rtems_irq_mngt_init(void);
+void bsp_libc_init( void *, uint32_t, int );
+void bsp_postdriver_hook(void);
+extern void UART0_Ini(void);
+extern void printi(unsigned long);
+extern void debug_printk(char*);
+/**************************************************************************/
+/* */
+/* NAME: bps_pretasking_hook - Function to setup system before startup */
+/* */
+/* DESCRIPTION: */
+/* This function is called before drivers are initialized and used */
+/* to setup libc and BSP extensions. It configures non cacheable */
+/* SDRAM, SRAM, AIM, and ADM regions and sets up the CPU's memory */
+/* protection unit. */
+/* */
+/* GLOBALS USED: */
+/* free_mem_start */
+/* free_mem_end */
+/* */
+/* RESTRICTIONS/LIMITATIONS: */
+/* Since this function is setting up libc, it cannot use and libc */
+/* functions. */
+/* */
+/**************************************************************************/
+void bsp_pretasking_hook(void)
+{
+ uint32_t heap_start;
+ uint32_t heap_size;
+
+ /*
+ * Set up the heap. It uses all free SDRAM except that reserved
+ * for non-cached uses.
+ */
+ heap_start = free_mem_start;
+
+ /* heap_size = (free_mem_end - heap_start - MEM_NOCACHE_SIZE); */
+ /*the board seems to have only 512K memory, we use 256K as heap*/
+ heap_size = 0x40000;
+
+ bsp_libc_init((void *)heap_start, heap_size, 0);
+
+#ifdef RTEMS_DEBUG
+
+ rtems_debug_enable(RTEMS_DEBUG_ALL_MASK);
+
+#endif /* RTEMS_DEBUG */
+
+} /* bsp_pretasking_hook */
+
+/**************************************************************************/
+/* */
+/* NAME: bsp_start_default - BSP initialization function */
+/* */
+/* DESCRIPTION: */
+/* This function is called before RTEMS is initialized and used */
+/* adjust the kernel's configuration. */
+/* */
+/* This function also configures the CPU's memory protection unit. */
+/* */
+/* GLOBALS USED: */
+/* CPU_table */
+/* BSP_Configuration */
+/* free_mem_start */
+/* free_mem_end */
+/* free_mem_nocache_start */
+/* _bss_free_start */
+/* mpu_region_tbl */
+/* */
+/* */
+/* */
+/* */
+/* RESTRICTIONS/LIMITATIONS: */
+/* Since RTEMS is not configured, no RTEMS functions can be called. */
+/* */
+/**************************************************************************/
+void bsp_start_default( void )
+{
+ uint32_t i;
+ PINSEL2 =0x0f814914;
+ BCFG0 = 0x1000ffef;
+ BCFG1 = 0x1000ffef;
+
+ MEMMAP = 0x2; //debug and excute outside chip
+
+ PLLCON = 1;
+#if (Fpclk / (Fcclk / 4)) == 1
+ VPBDIV = 0;
+#endif
+#if (Fpclk / (Fcclk / 4)) == 2
+ VPBDIV = 2;
+#endif
+#if (Fpclk / (Fcclk / 4)) == 4
+ VPBDIV = 1;
+#endif
+
+#if (Fcco / Fcclk) == 2
+ PLLCFG = ((Fcclk / Fosc) - 1) | (0 << 5);
+#endif
+#if (Fcco / Fcclk) == 4
+ PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5);
+#endif
+#if (Fcco / Fcclk) == 8
+ PLLCFG = ((Fcclk / Fosc) - 1) | (2 << 5);
+#endif
+#if (Fcco / Fcclk) == 16
+ PLLCFG = ((Fcclk / Fosc) - 1) | (3 << 5);
+#endif
+ PLLFEED = 0xaa;
+ PLLFEED = 0x55;
+ while((PLLSTAT & (1 << 10)) == 0);
+ PLLCON = 3;
+ PLLFEED = 0xaa;
+ PLLFEED = 0x55;
+
+ /* memory configure */
+ //MAMCR = 0;
+ // MAMTIM = 3;
+ //MAMCR = 2;
+
+ /* init VIC */
+ VICIntEnClr = 0xffffffff;
+ VICVectAddr = 0;
+ VICIntSelect = 0;
+
+ /* disable interrupts */
+ /* Setup interrupt controller.*/
+ VICProtection = 0;
+
+
+ Cpu_table.pretasking_hook = bsp_pretasking_hook;
+ Cpu_table.postdriver_hook = bsp_postdriver_hook;
+ Cpu_table.do_zero_of_workspace = TRUE;
+ BSP_Configuration.microseconds_per_tick=100000;
+ /* Place RTEMS workspace at beginning of free memory. */
+ BSP_Configuration.work_space_start = (void *)&_bss_free_start;
+
+ free_mem_start = ((uint32_t)&_bss_free_start +
+ BSP_Configuration.work_space_size);
+
+ free_mem_end = ((uint32_t)&_sdram_base + (uint32_t)&_sdram_size);
+
+ UART0_Ini();
+
+ #if 0
+ debug_printk(" bsp_start_defalt");
+
+ debug_printk(" _bss_free_start");
+ printi((int)&_bss_free_start);
+
+ debug_printk(" free_mem_start");
+ printi((int)free_mem_start);
+
+ debug_printk(" _sdram_base");
+ printi((int)&_sdram_base);
+
+ debug_printk(" _sdram_size");
+ printi((int)&_sdram_size);
+
+ debug_printk(" free_mem_end");
+ printi((int)free_mem_end);
+
+
+ printi(free_mem_end);
+ #endif
+
+ /*
+ * Init rtems exceptions management
+ */
+ rtems_exception_init_mngt();
+
+ /*
+ * Init rtems interrupt management
+ */
+ rtems_irq_mngt_init();
+
+ /*
+ * The following information is very useful when debugging.
+ */
+#if 0
+
+ printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size );
+ printk( "maximum_extensions = 0x%x\n", BSP_Configuration.maximum_extensions );
+ printk( "microseconds_per_tick = 0x%x\n",
+ BSP_Configuration.microseconds_per_tick );
+ printk( "ticks_per_timeslice = 0x%x\n",
+ BSP_Configuration.ticks_per_timeslice );
+ printk( "maximum_devices = 0x%x\n", BSP_Configuration.maximum_devices );
+ printk( "number_of_device_drivers = 0x%x\n",
+ BSP_Configuration.number_of_device_drivers );
+ printk( "Device_driver_table = 0x%x\n",
+ BSP_Configuration.Device_driver_table );
+
+ /* printk( "_stack_size = 0x%x\n", _stack_size );*/
+ printk( "work_space_start = 0x%x\n", BSP_Configuration.work_space_start );
+ printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size );
+#endif
+} /* bsp_start */
+
+
+/** + * Reset the system. + * + * This functions enables the watchdog and waits for it to + * fire, thus resetting the system. + */ +/** + * Reset the system. + * + * This functions enables the watchdog and waits for it to + * fire, thus resetting the system. + */ +void bsp_reset(void) +{ + rtems_interrupt_level level; + + _CPU_ISR_Disable(level); + + while(1);
+} +
+/*
+ * By making this a weak alias for bsp_start_default, a brave soul
+ * can override the actual bsp_start routine used.
+ */
+
+void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default")));
|