/*
* 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.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
*
* 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.
*
* Modified to support the MCP750.
* Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr
*
* $Id$
*/
#include <string.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <bsp/consoleIo.h>
#include <libcpu/spr.h>
#include <bsp/residual.h>
#include <bsp/pci.h>
#include <bsp/openpic.h>
#include <bsp/irq.h>
#include <bsp/VME.h>
#include <bsp.h>
#include <libcpu/bat.h>
#include <libcpu/pte121.h>
#include <libcpu/cpuIdent.h>
#include <bsp/vectors.h>
#include <bsp/motorola.h>
extern void _return_to_ppcbug();
extern unsigned long __rtems_end[];
extern void L1_caches_enables();
extern unsigned get_L2CR();
extern void set_L2CR(unsigned);
extern void bsp_cleanup(void);
extern Triv121PgTbl BSP_pgtbl_setup();
extern void BSP_pgtbl_activate();
extern void BSP_vme_config();
SPR_RW(SPRG0)
SPR_RW(SPRG1)
/*
* Copy of residuals passed by firmware
*/
RESIDUAL residualCopy;
/*
* Copy Additional boot param passed by boot loader
*/
#define MAX_LOADER_ADD_PARM 80
char loaderParam[MAX_LOADER_ADD_PARM];
/*
* Vital Board data Start using DATA RESIDUAL
*/
/*
* Total memory using RESIDUAL DATA
*/
unsigned int BSP_mem_size;
/*
* PCI Bus Frequency
*/
unsigned int BSP_bus_frequency;
/*
* processor clock frequency
*/
unsigned int BSP_processor_frequency;
/*
* Time base divisior (how many tick for 1 second).
*/
unsigned int BSP_time_base_divisor;
/*
* system init stack and soft ir stack size
*/
#define INIT_STACK_SIZE 0x1000
#define INTR_STACK_SIZE CONFIGURE_INTERRUPT_STACK_MEMORY
void BSP_panic(char *s)
{
printk("%s PANIC %s\n",_RTEMS_version, s);
__asm__ __volatile ("sc");
}
void _BSP_Fatal_error(unsigned int v)
{
printk("%s PANIC ERROR %x\n",_RTEMS_version, v);
__asm__ __volatile ("sc");
}
/*
* The original 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;
char *rtems_progname;
/*
* Use the shared implementations of the following routines
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, uint32_t, int );
/*
* Function: bsp_pretasking_hook
* Created: 95/03/10
*
* Description:
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*
* NOTES:
* Must not use libc (to do io) from here, since drivers are
* not yet initialized.
*
*/
void bsp_pretasking_hook(void)
{
uint32_t heap_start;
uint32_t heap_size;
uint32_t heap_sbrk_spared;
extern uint32_t _bsp_sbrk_init(uint32_t, uint32_t*);
heap_start = ((uint32_t) __rtems_end) +INIT_STACK_SIZE + INTR_STACK_SIZE;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_size = (BSP_mem_size - heap_start) - BSP_Configuration.work_space_size;
heap_sbrk_spared=_bsp_sbrk_init(heap_start, &heap_size);
#ifdef SHOW_MORE_INIT_SETTINGS
printk(" HEAP start %x size %x (%x bytes spared for sbrk)\n", heap_start, heap_size, heap_sbrk_spared);
#endif
bsp_libc_init((void *) 0, heap_size, heap_sbrk_spared);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
void zero_bss()
{
/* prevent these from being accessed in the short data areas */
extern unsigned long __bss_start[], __SBSS_START__[], __SBSS_END__[];
extern unsigned long __SBSS2_START__[], __SBSS2_END__[];
memset(__SBSS_START__, 0, ((unsigned) __SBSS_END__) - ((unsigned)__SBSS_START__));
memset(__SBSS2_START__, 0, ((unsigned) __SBSS2_END__) - ((unsigned)__SBSS2_START__));
memset(__bss_start, 0, ((unsigned) __rtems_end) - ((unsigned)__bss_start));
}
void save_boot_params(RESIDUAL* r3, void *r4, void* r5, char *additional_boot_options)
{
residualCopy = *r3;
strncpy(loaderParam, additional_boot_options, MAX_LOADER_ADD_PARM);
loaderParam[MAX_LOADER_ADD_PARM - 1] ='\0';
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
int err;
unsigned char *stack;
unsigned l2cr;
register unsigned char* intrStack;
unsigned char *work_space_start;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
prep_t boardManufacturer;
motorolaBoard myBoard;
Triv121PgTbl pt=0;
/*
* Get CPU identification dynamically. Note that the get_ppc_cpu_type() function
* store the result in global variables so that it can be used latter...
*/
myCpu = get_ppc_cpu_type();
myCpuRevision = get_ppc_cpu_revision();
/*
* enables L1 Cache. Note that the L1_caches_enables() codes checks for
* relevant CPU type so that the reason why there is no use of myCpu...
*/
L1_caches_enables();
/*
* Enable L2 Cache. Note that the set_L2CR(L2CR) codes checks for
* relevant CPU type (mpc750)...
*/
l2cr = get_L2CR();
#ifdef SHOW_LCR2_REGISTER
printk("Initial L2CR value = %x\n", l2cr);
#endif
if ( (! (l2cr & 0x80000000)) && ((int) l2cr == -1))
set_L2CR(0xb9A14000);
/*
* the initial stack has aready been set to this value in start.S
* so there is no need to set it in r1 again... It is just for info
* so that It can be printed without accessing R1.
*/
stack = ((unsigned char*) __rtems_end) + INIT_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
*((uint32_t*)stack) = 0;
/*
* Initialize the interrupt related settings
* SPRG1 = software managed IRQ stack
*
* This could be done latter (e.g in IRQ_INIT) but it helps to understand
* some settings below...
*/
intrStack = ((unsigned char*) __rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
/* make sure it's properly aligned */
(uint32_t)intrStack &= ~(CPU_STACK_ALIGNMENT-1);
/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
*((uint32_t*)intrStack) = 0;
_write_SPRG1((unsigned int)intrStack);
/* signal them that we have fixed PR288 - eventually, this should go away */
_write_SPRG0(PPC_BSP_HAS_FIXED_PR288);
/*
* Initialize default raw exception hanlders. See vectors/vectors_init.c
*/
initialize_exceptions();
/*
* Init MMU block address translation to enable hardware
* access
*/
/*
* PC legacy IO space used for inb/outb and all PC
* compatible hardware
*/
setdbat(1, _IO_BASE, _IO_BASE, 0x10000000, IO_PAGE);
/*
* PCI devices memory area. Needed to access OPENPIC features
* provided by the RAVEN
*/
/* T. Straumann: give more PCI address space */
setdbat(2, PCI_MEM_BASE, PCI_MEM_BASE, 0x10000000, IO_PAGE);
/*
* Must have acces to open pic PCI ACK registers
* provided by the RAVEN
*
*/
setdbat(3, 0xf0000000, 0xf0000000, 0x10000000, IO_PAGE);
select_console(CONSOLE_LOG);
/* We check that the keyboard is present and immediately
* select the serial console if not.
*/
err = kbdreset();
if (err) select_console(CONSOLE_SERIAL);
boardManufacturer = checkPrepBoardType(&residualCopy);
if (boardManufacturer != PREP_Motorola) {
printk("Unsupported hardware vendor\n");
while (1);
}
myBoard = getMotorolaBoard();
printk("-----------------------------------------\n");
printk("Welcome to %s on %s\n", _RTEMS_version, motorolaBoardToString(myBoard));
printk("-----------------------------------------\n");
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Residuals are located at %x\n", (unsigned) &residualCopy);
printk("Additionnal boot options are %s\n", loaderParam);
printk("Initial system stack at %x\n",stack);
printk("Software IRQ stack at %x\n",intrStack);
printk("-----------------------------------------\n");
#endif
#ifdef TEST_RETURN_TO_PPCBUG
printk("Hit <Enter> to return to PPCBUG monitor\n");
printk("When Finished hit GO. It should print <Back from monitor>\n");
debug_getc();
_return_to_ppcbug();
printk("Back from monitor\n");
_return_to_ppcbug();
#endif /* TEST_RETURN_TO_PPCBUG */
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Going to start PCI buses scanning and initialization\n");
#endif
InitializePCI();
{
const struct _int_map *bspmap = motorolaIntMap(currentBoard);
if( bspmap )
{
printk("pci : Configuring interrupt routing for '%s'\n", motorolaBoardToString(currentBoard));
FixupPCI(bspmap, motorolaIntSwizzle(currentBoard) );
}
else
printk("pci : Interrupt routing not available for this bsp\n");
}
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Number of PCI buses found is : %d\n", BusCountPCI());
#endif
#ifdef TEST_RAW_EXCEPTION_CODE
printk("Testing exception handling Part 1\n");
/*
* Cause a software exception
*/
__asm__ __volatile ("sc");
/*
* Check we can still catch exceptions and returned coorectly.
*/
printk("Testing exception handling Part 2\n");
__asm__ __volatile ("sc");
#endif
BSP_mem_size = residualCopy.TotalMemory;
BSP_bus_frequency = residualCopy.VitalProductData.ProcessorBusHz;
BSP_processor_frequency = residualCopy.VitalProductData.ProcessorHz;
BSP_time_base_divisor = (residualCopy.VitalProductData.TimeBaseDivisor?
residualCopy.VitalProductData.TimeBaseDivisor : 4000);
/* clear hostbridge errors but leave MCP disabled -
* PCI config space scanning code will trip otherwise :-(
*/
_BSP_clear_hostbridge_errors(0 /* enableMCP */, 0/*quiet*/);
/* Allocate and set up the page table mappings
* This is only available on >604 CPUs.
*
* NOTE: This setup routine may modify the available memory
* size. It is essential to call it before
* calculating the workspace etc.
*/
pt = BSP_pgtbl_setup(&BSP_mem_size);
if (!pt ||
TRIV121_MAP_SUCCESS != triv121PgTblMap(
pt,
TRIV121_121_VSID,
0xfeff0000,
1,
TRIV121_ATTR_IO_PAGE,
TRIV121_PP_RW_PAGE
)) {
printk("WARNING: unable to setup page tables VME bridge must share PCI space\n");
}
/*
* Set up our hooks
* Make sure libc_init is done before drivers initialized so that
* they can use atexit()
*/
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.do_zero_of_workspace = TRUE;
Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
Cpu_table.clicks_per_usec = BSP_processor_frequency/(BSP_time_base_divisor * 1000);
Cpu_table.exceptions_in_RAM = TRUE;
#ifdef SHOW_MORE_INIT_SETTINGS
printk("BSP_Configuration.work_space_size = %x\n", BSP_Configuration.work_space_size);
#endif
work_space_start =
(unsigned char *)BSP_mem_size - BSP_Configuration.work_space_size;
if ( work_space_start <= ((unsigned char *)__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE) {
printk( "bspstart: Not enough RAM!!!\n" );
bsp_cleanup();
}
BSP_Configuration.work_space_start = work_space_start;
/*
* Initalize RTEMS IRQ system
*/
BSP_rtems_irq_mng_init(0);
/* Activate the page table mappings only after
* initializing interrupts because the irq_mng_init()
* routine needs to modify the text
*/
if (pt) {
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Page table setup finished; will activate it NOW...\n");
#endif
BSP_pgtbl_activate(pt);
/* finally, switch off DBAT3 */
setdbat(3, 0, 0, 0, 0);
}
/*
* Initialize VME bridge - needs working PCI
* and IRQ subsystems...
*/
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Going to initialize VME bridge\n");
#endif
/* VME initialization is in a separate file so apps which don't use
* VME or want a different configuration may link against a customized
* routine.
*/
BSP_vme_config();
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Exit from bspstart\n");
#endif
}
