forked from Imagelibrary/rtems
20c214e3bc
PR 497/bsps * ChangeLog, bootloader/head.S, startup/bspstart.c: Disable code that returned to the firmware when the loader starts. * startup/sbrk.c: New file.
435 lines
12 KiB
C
435 lines
12 KiB
C
/*
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* This routine starts the application. It includes application,
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* board, and monitor specific initialization and configuration.
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* The generic CPU dependent initialization has been performed
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* before this routine is invoked.
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*
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* COPYRIGHT (c) 1989-1998.
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* On-Line Applications Research Corporation (OAR).
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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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* http://www.rtems.com/license/LICENSE.
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*
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* Modified to support the MCP750.
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* Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr
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*
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* $Id$
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*/
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#include <string.h>
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#include <rtems/libio.h>
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#include <rtems/libcsupport.h>
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#include <bsp/consoleIo.h>
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#include <libcpu/spr.h>
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#include <bsp/residual.h>
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#include <bsp/pci.h>
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#include <bsp/openpic.h>
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#include <bsp/irq.h>
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#include <bsp/VME.h>
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#include <bsp.h>
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#include <libcpu/bat.h>
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#include <libcpu/pte121.h>
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#include <libcpu/cpuIdent.h>
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#include <bsp/vectors.h>
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#include <bsp/motorola.h>
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extern void _return_to_ppcbug();
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extern unsigned long __rtems_end[];
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extern void L1_caches_enables();
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extern unsigned get_L2CR();
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extern void set_L2CR(unsigned);
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extern void bsp_cleanup(void);
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extern Triv121PgTbl BSP_pgtbl_setup();
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extern void BSP_pgtbl_activate();
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extern void BSP_vme_config();
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SPR_RW(SPRG0)
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SPR_RW(SPRG1)
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/*
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* Copy of residuals passed by firmware
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*/
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RESIDUAL residualCopy;
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/*
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* Copy Additional boot param passed by boot loader
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*/
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#define MAX_LOADER_ADD_PARM 80
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char loaderParam[MAX_LOADER_ADD_PARM];
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/*
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* Vital Board data Start using DATA RESIDUAL
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*/
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/*
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* Total memory using RESIDUAL DATA
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*/
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unsigned int BSP_mem_size;
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/*
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* PCI Bus Frequency
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*/
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unsigned int BSP_bus_frequency;
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/*
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* processor clock frequency
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*/
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unsigned int BSP_processor_frequency;
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/*
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* Time base divisior (how many tick for 1 second).
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*/
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unsigned int BSP_time_base_divisor;
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/*
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* system init stack and soft ir stack size
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*/
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#define INIT_STACK_SIZE 0x1000
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#define INTR_STACK_SIZE CONFIGURE_INTERRUPT_STACK_MEMORY
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void BSP_panic(char *s)
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{
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printk("%s PANIC %s\n",_RTEMS_version, s);
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__asm__ __volatile ("sc");
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}
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void _BSP_Fatal_error(unsigned int v)
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{
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printk("%s PANIC ERROR %x\n",_RTEMS_version, v);
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__asm__ __volatile ("sc");
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}
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/*
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* The original table from the application and our copy of it with
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* some changes.
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*/
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extern rtems_configuration_table Configuration;
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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;
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/*
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* Use the shared implementations of the following routines
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*/
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void bsp_postdriver_hook(void);
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void bsp_libc_init( void *, unsigned32, int );
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/*
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* Function: bsp_pretasking_hook
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* Created: 95/03/10
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*
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* Description:
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* BSP pretasking hook. Called just before drivers are initialized.
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* Used to setup libc and install any BSP extensions.
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*
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* NOTES:
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* Must not use libc (to do io) from here, since drivers are
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* not yet initialized.
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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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rtems_unsigned32 heap_start;
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rtems_unsigned32 heap_size;
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rtems_unsigned32 heap_sbrk_spared;
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extern rtems_unsigned32 _bsp_sbrk_init(rtems_unsigned32, rtems_unsigned32*);
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heap_start = ((rtems_unsigned32) __rtems_end) +INIT_STACK_SIZE + INTR_STACK_SIZE;
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if (heap_start & (CPU_ALIGNMENT-1))
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heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
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heap_size = (BSP_mem_size - heap_start) - BSP_Configuration.work_space_size;
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heap_sbrk_spared=_bsp_sbrk_init(heap_start, &heap_size);
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk(" HEAP start %x size %x (%x bytes spared for sbrk)\n", heap_start, heap_size, heap_sbrk_spared);
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#endif
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bsp_libc_init((void *) 0, heap_size, heap_sbrk_spared);
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#ifdef RTEMS_DEBUG
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rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
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#endif
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}
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void zero_bss()
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{
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/* prevent these from being accessed in the short data areas */
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extern unsigned long __bss_start[], __SBSS_START__[], __SBSS_END__[];
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extern unsigned long __SBSS2_START__[], __SBSS2_END__[];
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memset(__SBSS_START__, 0, ((unsigned) __SBSS_END__) - ((unsigned)__SBSS_START__));
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memset(__SBSS2_START__, 0, ((unsigned) __SBSS2_END__) - ((unsigned)__SBSS2_START__));
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memset(__bss_start, 0, ((unsigned) __rtems_end) - ((unsigned)__bss_start));
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}
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void save_boot_params(RESIDUAL* r3, void *r4, void* r5, char *additional_boot_options)
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{
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residualCopy = *r3;
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strncpy(loaderParam, additional_boot_options, MAX_LOADER_ADD_PARM);
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loaderParam[MAX_LOADER_ADD_PARM - 1] ='\0';
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}
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/*
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* bsp_start
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*
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* This routine does the bulk of the system initialization.
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*/
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void bsp_start( void )
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{
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int err;
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unsigned char *stack;
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unsigned l2cr;
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register unsigned char* intrStack;
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unsigned char *work_space_start;
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ppc_cpu_id_t myCpu;
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ppc_cpu_revision_t myCpuRevision;
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prep_t boardManufacturer;
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motorolaBoard myBoard;
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Triv121PgTbl pt=0;
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/*
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* Get CPU identification dynamically. Note that the get_ppc_cpu_type() function
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* store the result in global variables so that it can be used latter...
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*/
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myCpu = get_ppc_cpu_type();
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myCpuRevision = get_ppc_cpu_revision();
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/*
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* enables L1 Cache. Note that the L1_caches_enables() codes checks for
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* relevant CPU type so that the reason why there is no use of myCpu...
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*/
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L1_caches_enables();
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/*
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* Enable L2 Cache. Note that the set_L2CR(L2CR) codes checks for
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* relevant CPU type (mpc750)...
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*/
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l2cr = get_L2CR();
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#ifdef SHOW_LCR2_REGISTER
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printk("Initial L2CR value = %x\n", l2cr);
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#endif
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if ( (! (l2cr & 0x80000000)) && ((int) l2cr == -1))
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set_L2CR(0xb9A14000);
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/*
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* the initial stack has aready been set to this value in start.S
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* so there is no need to set it in r1 again... It is just for info
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* so that It can be printed without accessing R1.
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*/
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stack = ((unsigned char*) __rtems_end) + INIT_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
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/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
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*((unsigned32 *)stack) = 0;
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/*
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* Initialize the interrupt related settings
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* SPRG1 = software managed IRQ stack
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*
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* This could be done latter (e.g in IRQ_INIT) but it helps to understand
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* some settings below...
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*/
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intrStack = ((unsigned char*) __rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
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/* make sure it's properly aligned */
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(unsigned32)intrStack &= ~(CPU_STACK_ALIGNMENT-1);
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/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
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*((unsigned32 *)intrStack) = 0;
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_write_SPRG1((unsigned int)intrStack);
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/* signal them that we have fixed PR288 - eventually, this should go away */
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_write_SPRG0(PPC_BSP_HAS_FIXED_PR288);
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/*
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* Initialize default raw exception hanlders. See vectors/vectors_init.c
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*/
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initialize_exceptions();
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/*
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* Init MMU block address translation to enable hardware
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* access
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*/
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/*
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* PC legacy IO space used for inb/outb and all PC
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* compatible hardware
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*/
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setdbat(1, _IO_BASE, _IO_BASE, 0x10000000, IO_PAGE);
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/*
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* PCI devices memory area. Needed to access OPENPIC features
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* provided by the RAVEN
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*/
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/* T. Straumann: give more PCI address space */
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setdbat(2, PCI_MEM_BASE, PCI_MEM_BASE, 0x10000000, IO_PAGE);
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/*
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* Must have acces to open pic PCI ACK registers
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* provided by the RAVEN
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*
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*/
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setdbat(3, 0xf0000000, 0xf0000000, 0x10000000, IO_PAGE);
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select_console(CONSOLE_LOG);
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/* We check that the keyboard is present and immediately
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* select the serial console if not.
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*/
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err = kbdreset();
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if (err) select_console(CONSOLE_SERIAL);
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boardManufacturer = checkPrepBoardType(&residualCopy);
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if (boardManufacturer != PREP_Motorola) {
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printk("Unsupported hardware vendor\n");
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while (1);
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}
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myBoard = getMotorolaBoard();
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printk("-----------------------------------------\n");
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printk("Welcome to %s on %s\n", _RTEMS_version, motorolaBoardToString(myBoard));
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printk("-----------------------------------------\n");
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk("Residuals are located at %x\n", (unsigned) &residualCopy);
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printk("Additionnal boot options are %s\n", loaderParam);
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printk("Initial system stack at %x\n",stack);
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printk("Software IRQ stack at %x\n",intrStack);
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printk("-----------------------------------------\n");
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#endif
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#ifdef TEST_RETURN_TO_PPCBUG
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printk("Hit <Enter> to return to PPCBUG monitor\n");
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printk("When Finished hit GO. It should print <Back from monitor>\n");
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debug_getc();
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_return_to_ppcbug();
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printk("Back from monitor\n");
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_return_to_ppcbug();
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#endif /* TEST_RETURN_TO_PPCBUG */
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk("Going to start PCI buses scanning and initialization\n");
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#endif
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InitializePCI();
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{
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struct _int_map *bspmap = motorolaIntMap(currentBoard);
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if( bspmap )
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{
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printk("pci : Configuring interrupt routing for '%s'\n", motorolaBoardToString(currentBoard));
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FixupPCI(bspmap, motorolaIntSwizzle(currentBoard) );
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}
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else
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printk("pci : Interrupt routing not available for this bsp\n");
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}
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk("Number of PCI buses found is : %d\n", BusCountPCI());
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#endif
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#ifdef TEST_RAW_EXCEPTION_CODE
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printk("Testing exception handling Part 1\n");
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/*
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* Cause a software exception
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*/
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__asm__ __volatile ("sc");
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/*
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* Check we can still catch exceptions and returned coorectly.
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*/
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printk("Testing exception handling Part 2\n");
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__asm__ __volatile ("sc");
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#endif
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BSP_mem_size = residualCopy.TotalMemory;
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BSP_bus_frequency = residualCopy.VitalProductData.ProcessorBusHz;
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BSP_processor_frequency = residualCopy.VitalProductData.ProcessorHz;
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BSP_time_base_divisor = (residualCopy.VitalProductData.TimeBaseDivisor?
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residualCopy.VitalProductData.TimeBaseDivisor : 4000);
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/* clear hostbridge errors but leave MCP disabled -
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* PCI config space scanning code will trip otherwise :-(
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*/
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_BSP_clear_hostbridge_errors(0 /* enableMCP */, 0/*quiet*/);
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/* Allocate and set up the page table mappings
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* This is only available on >604 CPUs.
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*
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* NOTE: This setup routine may modify the available memory
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* size. It is essential to call it before
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* calculating the workspace etc.
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*/
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pt = BSP_pgtbl_setup(&BSP_mem_size);
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if (!pt ||
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TRIV121_MAP_SUCCESS != triv121PgTblMap(
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pt,
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TRIV121_121_VSID,
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0xfeff0000,
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1,
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TRIV121_ATTR_IO_PAGE,
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TRIV121_PP_RW_PAGE
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)) {
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printk("WARNING: unable to setup page tables VME bridge must share PCI space\n");
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}
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/*
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* Set up our hooks
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* Make sure libc_init is done before drivers initialized so that
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* they can use atexit()
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*/
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Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
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Cpu_table.postdriver_hook = bsp_postdriver_hook;
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Cpu_table.do_zero_of_workspace = TRUE;
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Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
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Cpu_table.clicks_per_usec = BSP_processor_frequency/(BSP_time_base_divisor * 1000);
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Cpu_table.exceptions_in_RAM = TRUE;
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk("BSP_Configuration.work_space_size = %x\n", BSP_Configuration.work_space_size);
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#endif
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work_space_start =
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(unsigned char *)BSP_mem_size - BSP_Configuration.work_space_size;
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if ( work_space_start <= ((unsigned char *)__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE) {
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printk( "bspstart: Not enough RAM!!!\n" );
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bsp_cleanup();
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}
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BSP_Configuration.work_space_start = work_space_start;
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/*
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* Initalize RTEMS IRQ system
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*/
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BSP_rtems_irq_mng_init(0);
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/* Activate the page table mappings only after
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* initializing interrupts because the irq_mng_init()
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* routine needs to modify the text
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*/
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if (pt) {
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk("Page table setup finished; will activate it NOW...\n");
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#endif
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BSP_pgtbl_activate(pt);
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/* finally, switch off DBAT3 */
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setdbat(3, 0, 0, 0, 0);
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}
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/*
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* Initialize VME bridge - needs working PCI
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* and IRQ subsystems...
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*/
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk("Going to initialize VME bridge\n");
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#endif
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/* VME initialization is in a separate file so apps which don't use
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* VME or want a different configuration may link against a customized
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* routine.
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*/
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BSP_vme_config();
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk("Exit from bspstart\n");
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#endif
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}
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