/*
* 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
*
* Modified to support the Synergy VGM & Motorola PowerPC boards
* (C) by Till Straumann, <strauman@slac.stanford.edu>, 2002, 2004, 2005
*
* Modified to support the MVME5500 board.
* Also, the settings of L1, L2, and L3 caches is not necessary here.
* (C) by Brookhaven National Lab., S. Kate Feng <feng1@bnl.gov>, 2003, 2004, 2005
*
* $Id$
*/
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <rtems/system.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <rtems/powerpc/powerpc.h>
#include <libcpu/spr.h> /* registers.h is included here */
#include <bsp.h>
#include <bsp/uart.h>
#include <bsp/pci.h>
#include <libcpu/bat.h>
#include <libcpu/pte121.h>
#include <libcpu/cpuIdent.h>
#include <bsp/vectors.h>
#include <bsp/bspException.h>
#include <rtems/bspIo.h>
#include <rtems/sptables.h>
#ifdef __RTEMS_APPLICATION__
#undef __RTEMS_APPLICATION__
#endif
/*
#define SHOW_MORE_INIT_SETTINGS
#define SHOW_LCR1_REGISTER
#define SHOW_LCR2_REGISTER
#define SHOW_LCR3_REGISTER
#define CONF_VPD
*/
/* there is no public Workspace_Free() variant :-( */
#include <rtems/score/wkspace.h>
BSP_output_char_function_type BSP_output_char = BSP_output_char_via_serial;
extern void _return_to_ppcbug();
extern unsigned long __rtems_end[];
extern unsigned get_L1CR(), get_L2CR(), get_L3CR();
extern void bsp_cleanup(void);
extern Triv121PgTbl BSP_pgtbl_setup();
extern void BSP_pgtbl_activate();
extern int I2Cread_eeprom();
extern void BSP_vme_config(void);
SPR_RW(SPRG0)
SPR_RW(SPRG1)
typedef struct CmdLineRec_ {
unsigned long size;
char buf[0];
} CmdLineRec, *CmdLine;
#define mtspr(reg, val) \
__asm __volatile("mtspr %0,%1" : : "K"(reg), "r"(val))
#define mfspr(reg) \
( { unsigned val; \
__asm __volatile("mfspr %0,%1" : "=r"(val) : "K"(reg)); \
val; } )
/*
* Copy Additional boot param passed by boot loader
*/
#define MAX_LOADER_ADD_PARM 80
char loaderParam[MAX_LOADER_ADD_PARM];
/*
* Total memory using RESIDUAL DATA
*/
unsigned int BSP_mem_size;
/*
* PCI Bus Frequency
*/
/*
* Start of the heap
*/
unsigned int BSP_heap_start;
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;
unsigned char ConfVPD_buff[200];
#define CMDLINE_BUF_SIZE 2048
static char cmdline_buf[CMDLINE_BUF_SIZE];
char *BSP_commandline_string = cmdline_buf;
/*
* 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
*/
extern void bsp_postdriver_hook(void); /* see c/src/lib/libbsp/shared/bsppost.c */
extern void bsp_libc_init( void *, uint32_t, int );
extern void bsp_pretasking_hook(void);
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));
}
/* NOTE: we cannot simply malloc the commandline string;
* save_boot_params() is called during a very early stage when
* libc/malloc etc. are not yet initialized!
*
* Here's what we do:
*
* initial layout setup by the loader (preload.S):
*
* 0..RTEMS...__rtems_end | cmdline ....... TOP
*
* After the save_boot_params() routine returns, the stack area will be
* set up (start.S):
*
* 0..RTEMS..__rtems_end | INIT_STACK | IRQ_STACK | ..... TOP
*
* initialize_executive_early() [called from boot_card()]
* will initialize the workspace:
*
* 0..RTEMS..__rtems_end | INIT_STACK | IRQ_STACK | ...... | workspace | TOP
*
* and later calls our pretasking_hook() which ends up initializing
* libc which in turn initializes the heap
*
* 0..RTEMS..__rtems_end | INIT_STACK | IRQ_STACK | heap | workspace | TOP
*
* The idea here is to first move the commandline to the future 'heap' area
* from where it will be picked up by our pretasking_hook().
* pretasking_hook() then moves it either to INIT_STACK or the workspace
* area using proper allocation, initializes libc and finally moves
* the data to the environment / malloced areas...
*/
/* this routine is called early at shared/start/start.S
* and must be safe with a not properly aligned stack
*/
void
save_boot_params(void *r3, void *r4, void* r5, char *cmdline_start, char *cmdline_end)
{
int i=cmdline_end-cmdline_start;
if ( i >= CMDLINE_BUF_SIZE )
i = CMDLINE_BUF_SIZE-1;
else if ( i < 0 )
i = 0;
memmove(cmdline_buf, cmdline_start, i);
cmdline_buf[i]=0;
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
#ifdef CONF_VPD
int i;
#endif
unsigned char *stack;
unsigned long *r1sp;
#ifdef SHOW_LCR1_REGISTER
unsigned l1cr;
#endif
#ifdef SHOW_LCR2_REGISTER
unsigned l2cr;
#endif
#ifdef SHOW_LCR3_REGISTER
unsigned l3cr;
#endif
register uint32_t intrStack;
register uint32_t *intrStackPtr;
unsigned char *work_space_start;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
Triv121PgTbl pt=0;
/* Till Straumann: 4/2005
* Need to map the system registers early, so we can printk...
* (otherwise we silently die)
*/
/*
* Kate Feng : PCI 0 domain memory space, want to leave room for the VME window
*/
setdbat(2, PCI0_MEM_BASE, PCI0_MEM_BASE, 0x10000000, IO_PAGE);
/* Till Straumann: 2004
* map the PCI 0, 1 Domain I/O space, GT64260B registers
* and the reserved area so that the size is the power of 2.
*
*/
setdbat(3,PCI0_IO_BASE, PCI0_IO_BASE, 0x2000000, IO_PAGE);
/*
* 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();
#ifdef SHOW_LCR1_REGISTER
l1cr = get_L1CR();
printk("Initial L1CR value = %x\n", l1cr);
#endif
/*
* 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 - PPC_MINIMUM_STACK_FRAME_SIZE;
/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
*((uint32_t *)stack) = 0;
/* fill stack with pattern for debugging */
__asm__ __volatile__("mr %0, %%r1":"=r"(r1sp));
while (--r1sp >= (unsigned long*)__rtems_end)
*r1sp=0xeeeeeeee;
/*
* Initialize the interrupt related settings
* SPRG0 = interrupt nesting level count
* SPRG1 = software managed IRQ stack
*
* This could be done latter (e.g in IRQ_INIT) but it helps to understand
* some settings below...
*/
BSP_heap_start = ((uint32_t) __rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE;
intrStack = BSP_heap_start - PPC_MINIMUM_STACK_FRAME_SIZE;
/* make sure it's properly aligned */
intrStack &= ~(CPU_STACK_ALIGNMENT-1);
/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
intrStackPtr = (uint32_t*) intrStack;
*intrStackPtr = 0;
_write_SPRG1(intrStack);
_write_SPRG0(PPC_BSP_HAS_FIXED_PR288);
/*
* Initialize default raw exception hanlders. See vectors/vectors_init.c
*/
Cpu_table.exceptions_in_RAM = TRUE;
initialize_exceptions();
/*
* Init MMU block address translation to enable hardware
* access
* More PCI1 memory mapping to be done after BSP_pgtbl_activate.
*/
printk("-----------------------------------------\n");
printk("Welcome to %s on MVME5500-0163\n", _RTEMS_version );
printk("-----------------------------------------\n");
#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 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 = _512M;
/* TODO: calculate the BSP_bus_frequency using the REF_CLK bit of System Status register */
/* rtems_bsp_delay_in_bus_cycles are defined in registers.h */
BSP_bus_frequency = 133333333;
BSP_processor_frequency = 1000000000;
BSP_time_base_divisor = 4000;/* P94 : 7455 clocks the TB/DECR at 1/4 of the system bus clock frequency */
/* Maybe not setup yet becuase of the warning message */
/* 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)
printk("WARNING: unable to setup page tables.\n");
printk("Now BSP_mem_size = 0x%x\n",BSP_mem_size);
/*
* 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;
/* P94 : 7455 TB/DECR is clocked by the system bus clock frequency */
Cpu_table.clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000);
Cpu_table.exceptions_in_RAM = TRUE;
_CPU_Table = Cpu_table;/* S. Kate Feng <feng1@bnl.gov>, for rtems_bsp_delay() */
printk("BSP_Configuration.work_space_size = %x\n", BSP_Configuration.work_space_size);
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);
#ifdef SHOW_LCR2_REGISTER
l2cr = get_L2CR();
printk("Initial L2CR value = %x\n", l2cr);
#endif
#ifdef SHOW_LCR3_REGISTER
/* L3CR needs DEC int. handler installed for bsp_delay()*/
l3cr = get_L3CR();
printk("Initial L3CR value = %x\n", l3cr);
#endif
/* 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);
}
/*
* PCI 1 domain memory space
*/
setdbat(1, PCI1_MEM_BASE, PCI1_MEM_BASE, 0x10000000, IO_PAGE);
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Going to start PCI buses scanning and initialization\n");
#endif
pci_initialize();
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Number of PCI buses found is : %d\n", pci_bus_count());
#endif
/* Install our own exception handler (needs PCI) */
globalExceptHdl = BSP_exceptionHandler;
/* clear hostbridge errors. MCP signal is not used on the MVME5500
* PCI config space scanning code will trip otherwise :-(
*/
_BSP_clear_hostbridge_errors(0, 1 /*quiet*/);
/* Read Configuration Vital Product Data (VPD) */
if ( I2Cread_eeprom(0xa8, 4,2, &ConfVPD_buff[0], 150))
printk("I2Cread_eeprom() error \n");
else {
#ifdef CONF_VPD
printk("\n");
for (i=0; i<150; i++) {
printk("%2x ", ConfVPD_buff[i]);
if ((i % 20)==0 ) printk("\n");
}
printk("\n");
#endif
}
#ifdef SHOW_MORE_INIT_SETTINGS
printk("MSR %x \n", _read_MSR());
printk("Exit from bspstart\n");
#endif
}
