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Diffstat (limited to 'c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c b/c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c new file mode 100644 index 0000000000..f99526403c --- /dev/null +++ b/c/src/lib/libbsp/powerpc/virtex4/startup/bspstart.c @@ -0,0 +1,255 @@ +/* bsp_start() + * + * 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. + * + * INPUT: NONE + * + * OUTPUT: NONE + * + * 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 <string.h> +#include <fcntl.h> + +#include <bsp.h> +#include <bsp/irq.h> +#include <bsp/vectors.h> +#include <rtems/bspIo.h> +#include <rtems/libio.h> +#include <rtems/libcsupport.h> +#include <rtems/sptables.h> /* for RTEMS_VERSION */ +#include <libcpu/cpuIdent.h> +#include <libcpu/spr.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) + + +/* Expected by clock.c */ +uint32_t bsp_clicks_per_usec; +bool bsp_timer_internal_clock; /* true, when timer runs with CPU clk */ +uint32_t bsp_timer_least_valid; +uint32_t bsp_timer_average_overhead; + + +/* 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); + + +/* + * Provide weak aliases so that RTEMS distribution builds + */ +static void _noopfun(void) {} +static void _bsp_start(void) +{ + rtems_status_code sc = RTEMS_SUCCESSFUL; + uintptr_t intrStackStart = CPU_UP_ALIGN((uint32_t)__bsp_ram_start); + uintptr_t intrStackSize = rtems_configuration_get_interrupt_stack_size(); + + /* + * Initialize default raw exception handlers. + * + * This BSP does not assume anything about firmware possibly loaded in the + * FPGA, so the external interrupt should not be enabled in order to avoid + * spurious interrupts. + */ + sc = ppc_exc_initialize(PPC_INTERRUPT_DISABLE_MASK_DEFAULT & ~MSR_EE, + intrStackStart, + intrStackSize); + if (sc != RTEMS_SUCCESSFUL) BSP_panic("Cannot initialize exceptions"); + + /* Install our own set of exception vectors */ + BSP_rtems_irq_mngt_init(0); +} + + +void app_bsp_start(void) +__attribute__(( weak, alias("_bsp_start") )); + +void app_bsp_pretasking_hook(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(;;); +} + + +void BSP_panic(char *s) +{ + printk("\n%s PANIC %s\n", _RTEMS_version, s); + BSP_ask_for_reset(); +} + + +void _BSP_Fatal_error(unsigned int v) +{ + printk("\n%s FATAL ERROR %x\n", _RTEMS_version, v); + BSP_ask_for_reset(); +} + + +/*===================================================================*/ + +/* + * 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("\nWelcome to RTEMS %s\n", _RTEMS_version ); + + /* + * 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; + bsp_timer_internal_clock = true; + bsp_timer_average_overhead = 2; + bsp_timer_least_valid = 3; + + /* + * Initialize the interrupt related settings. + */ + intrStackStart = CPU_UP_ALIGN((uint32_t)__bsp_ram_start); + intrStackSize = rtems_configuration_get_interrupt_stack_size(); + printk(" Base/Start End Size\n" + "RAM: 0x%08x 0x%x\n" + "RTEMS: 0x%08x\n" + "Interrupt Stack: 0x%08x 0x%x\n" + "Stack: 0x%08x 0x%08x 0x%x\n" + "Workspace: 0x%08x 0x%08x\n" + "MsgArea: 0x%08x 0x%x\n" + "Physical RAM 0x%08x\n", + (uint32_t)RamBase, (uint32_t)RamSize, + (uint32_t)__rtems_end, + intrStackStart, intrStackSize, + (uint32_t)__stack_base, (uint32_t)_stack, (uint32_t)StackSize, + (uint32_t)WorkAreaBase, (uint32_t)__bsp_ram_end, + (uint32_t)MsgAreaBase, (uint32_t)MsgAreaSize, + (uint32_t)__phy_ram_end); + + /* Continue with application-specific initialization */ + app_bsp_start(); +} + + +/* + * BSP pretasking hook. Called just before drivers are initialized. + * Used to setup libc and install any BSP extensions. + * + * Must not use libc (to do io) from here, since drivers are not yet + * initialized. + */ + +void bsp_pretasking_hook(void) +{ + app_bsp_pretasking_hook(); +} + + +/* + * BSP predriver hook. Called by boot_card() just before drivers are + * initialized. Clear out any stale interrupts here. + */ +void bsp_predriver_hook(void) +{ + app_bsp_predriver_hook(); +} |