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Diffstat (limited to 'bsps/powerpc/virtex4/start/bspstart.c')
| -rw-r--r-- | bsps/powerpc/virtex4/start/bspstart.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/bsps/powerpc/virtex4/start/bspstart.c b/bsps/powerpc/virtex4/start/bspstart.c new file mode 100644 index 0000000000..d5c255be6d --- /dev/null +++ b/bsps/powerpc/virtex4/start/bspstart.c @@ -0,0 +1,219 @@ +/* + * This routine starts the application. It includes application, + * board, and monitor specific initialization and configuration. + * The generic CPU dependent initialization has been performed + * before this routine is invoked. + */ + +/* + * Author: Thomas Doerfler <td@imd.m.isar.de> + * IMD Ingenieurbuero fuer Microcomputertechnik + * + * COPYRIGHT (c) 1998 by IMD + * + * Changes from IMD are covered by the original distributions terms. + * This file has been derived from the papyrus BSP: + * + * Author: Andrew Bray <andy@i-cubed.co.uk> + * + * COPYRIGHT (c) 1995 by i-cubed ltd. + * + * To anyone who acknowledges that this file is provided "AS IS" + * without any express or implied warranty: + * permission to use, copy, modify, and distribute this file + * for any purpose is hereby granted without fee, provided that + * the above copyright notice and this notice appears in all + * copies, and that the name of i-cubed limited not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * i-cubed limited makes no representations about the suitability + * of this software for any purpose. + * + * Modifications for spooling console driver and control of memory layout + * with linker command file by + * Thomas Doerfler <td@imd.m.isar.de> + * for these modifications: + * COPYRIGHT (c) 1997 by IMD, Puchheim, Germany. + * + * To anyone who acknowledges that this file is provided "AS IS" + * without any express or implied warranty: + * permission to use, copy, modify, and distribute this file + * for any purpose is hereby granted without fee, provided that + * the above copyright notice and this notice appears in all + * copies. IMD makes no representations about the suitability + * of this software for any purpose. + * + * Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c: + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * + * Modifications for PPC405GP by Dennis Ehlin + * Modifications for Virtex4 by Richard Claus <claus@slac.stanford.edu> + */ +#include <rtems.h> +#include <rtems/config.h> +#include <rtems/bspIo.h> +#include <rtems/counter.h> +#include <rtems/libio.h> +#include <rtems/libcsupport.h> +#include <rtems/sysinit.h> + +#include <libcpu/cpuIdent.h> +#include <libcpu/spr.h> + +#include <bsp.h> +#include <bsp/vectors.h> +#include <bsp/bootcard.h> +#include <bsp/irq.h> + +#include <string.h> +#include <fcntl.h> +#include <inttypes.h> + +#define DO_DOWN_ALIGN(x,a) ((x) & ~((a)-1)) + +#define DO_UP_ALIGN(x,a) DO_DOWN_ALIGN(((x) + (a) - 1 ),a) + +#define CPU_DOWN_ALIGN(x) DO_DOWN_ALIGN(x, CPU_ALIGNMENT) +#define CPU_UP_ALIGN(x) DO_UP_ALIGN(x, CPU_ALIGNMENT) + + +/* Defined in linkcmds linker script */ +LINKER_SYMBOL(RamBase); +LINKER_SYMBOL(RamSize); +LINKER_SYMBOL(__bsp_ram_start); +LINKER_SYMBOL(__bsp_ram_end); +LINKER_SYMBOL(__rtems_end); +LINKER_SYMBOL(_stack); +LINKER_SYMBOL(StackSize); +LINKER_SYMBOL(__stack_base); +LINKER_SYMBOL(WorkAreaBase); +LINKER_SYMBOL(MsgAreaBase); +LINKER_SYMBOL(MsgAreaSize); +LINKER_SYMBOL(__phy_ram_end); +LINKER_SYMBOL(bsp_exc_vector_base); + + +/* Expected by clock.c */ +uint32_t bsp_clicks_per_usec; + + +/* + * Provide weak aliases so that RTEMS distribution builds + */ +static void _noopfun(void) {} + + +void app_bsp_start(void) +__attribute__(( weak, alias("_noopfun") )); + +void app_bsp_predriver_hook(void) +__attribute__(( weak, alias("_noopfun") )); + + +static char* bspMsgBuffer = (char*)MsgAreaBase; + +static void __bsp_outchar_to_memory(char c) +{ + static char* msgBuffer = (char*)MsgAreaBase; + *msgBuffer++ = c; + if (msgBuffer >= &bspMsgBuffer[(int)MsgAreaSize]) msgBuffer = bspMsgBuffer; + *msgBuffer = 0x00; /* Overwrite next location to show EOM */ +} + + +void BSP_ask_for_reset(void) +{ + printk("\nSystem stopped, issue RESET"); + + for(;;); +} + + +/*===================================================================*/ + +/* + * BSP start routine. Called by boot_card(). + * + * This routine does the bulk of the system initialization. + */ +void bsp_start(void) +{ + uintptr_t intrStackStart; + uintptr_t intrStackSize; + + ppc_cpu_id_t myCpu; + ppc_cpu_revision_t myCpuRevision; + + /* Set the character output function; The application may override this */ + BSP_output_char = __bsp_outchar_to_memory; + + printk("RTEMS %s\n", rtems_get_version_string()); + + /* + * Get CPU identification dynamically. Note that the get_ppc_cpu_type() + * function stores the result in global variables so that it can be used later... + */ + myCpu = get_ppc_cpu_type(); + myCpuRevision = get_ppc_cpu_revision(); + printk("CPU: 0x%04x, Revision: 0x%04x = %d, Name: %s\n", + myCpu, myCpuRevision, myCpuRevision, get_ppc_cpu_type_name(myCpu)); + + /* + * Initialize the device driver parameters + */ + + /* Timebase register ticks/microsecond; The application may override these */ + bsp_clicks_per_usec = 350; + rtems_counter_initialize_converter(bsp_clicks_per_usec * 1000000); + + /* + * Initialize the interrupt related settings. + */ + intrStackStart = CPU_UP_ALIGN((uint32_t)__bsp_ram_start); + intrStackSize = rtems_configuration_get_interrupt_stack_size(); + + ppc_exc_initialize(intrStackStart, intrStackSize); + + /* Let the user know what parameters we were compiled with */ + printk(" Base/Start End Size\n" + "RAM: %p %p\n" + "RTEMS: %p\n" + "Interrupt Stack: 0x%08x 0x%x\n" + "Stack: %p %p %p\n" + "Workspace: %p %p\n" + "MsgArea: %p %p\n" + "Physical RAM %p\n", + RamBase, RamSize, + __rtems_end, + intrStackStart, intrStackSize, + __stack_base, _stack, StackSize, + WorkAreaBase, __bsp_ram_end, + MsgAreaBase, MsgAreaSize, + __phy_ram_end); + + /* + * Initialize RTEMS IRQ system + */ + BSP_rtems_irq_mngt_init(0); + + /* Continue with application-specific initialization */ + app_bsp_start(); +} + + +/* + * BSP predriver hook. Called by boot_card() just before drivers are + * initialized. Clear out any stale interrupts here. + */ +static void virtex4_pre_driver_hook(void) +{ + app_bsp_predriver_hook(); +} + +RTEMS_SYSINIT_ITEM( + virtex4_pre_driver_hook, + RTEMS_SYSINIT_BSP_PRE_DRIVERS, + RTEMS_SYSINIT_ORDER_MIDDLE +); |