/*
* This routine does the bulk of the system initialization.
*/
/*
* COPYRIGHT (c) 1989-2007.
* 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.org/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>, 2003-2009
*/
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <rtems/sysinit.h>
#include <rtems/powerpc/powerpc.h>
#include <libcpu/spr.h> /* registers.h is included here */
#include <bsp.h>
#include <bsp/bootcard.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/VME.h>
#include <bsp/bspException.h>
#include <rtems/bspIo.h>
#include <rtems/counter.h>
/*
#define SHOW_MORE_INIT_SETTINGS
#define SHOW_LCR1_REGISTER
#define SHOW_LCR2_REGISTER
#define SHOW_LCR3_REGISTER
#define CONF_VPD
*/
extern uint32_t probeMemoryEnd(void); /* from shared/startup/probeMemoryEnd.c */
BSP_output_char_function_type BSP_output_char = BSP_output_char_via_serial;
BSP_polling_getchar_function_type BSP_poll_char = NULL;
extern void _return_to_ppcbug(void);
extern unsigned long __rtems_end[];
extern unsigned get_L1CR(void), get_L2CR(void), get_L3CR(void);
extern Triv121PgTbl BSP_pgtbl_setup(unsigned int *);
extern void BSP_pgtbl_activate(Triv121PgTbl);
extern int I2Cread_eeprom(unsigned char I2cBusAddr, uint32_t devA2A1A0, uint32_t AddrBytes, unsigned char *pBuff, uint32_t numBytes);
extern void BSP_vme_config(void);
extern unsigned char ReadConfVPD_buff(int offset);
uint32_t bsp_clicks_per_usec;
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
*/
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;
static unsigned char ConfVPD_buff[200];
#define CMDLINE_BUF_SIZE 2048
static char cmdline_buf[CMDLINE_BUF_SIZE];
char *BSP_commandline_string = cmdline_buf;
/* 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 bsp_predriver_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 bsp_predriver_hook().
* bsp_predriver_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
*/
char *
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;
return cmdline_buf;
}
uint32_t _CPU_Counter_frequency(void)
{
return BSP_bus_frequency / (BSP_time_base_divisor / 1000);
}
static void bsp_early( void )
{
#ifdef CONF_VPD
int i;
#endif
#ifdef SHOW_LCR1_REGISTER
unsigned l1cr;
#endif
#ifdef SHOW_LCR2_REGISTER
unsigned l2cr;
#endif
#ifdef SHOW_LCR3_REGISTER
unsigned l3cr;
#endif
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.
* 2009 : map the entire 256 M space
*
*/
setdbat(3,PCI0_IO_BASE, PCI0_IO_BASE, 0x10000000, 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 later.
*/
get_ppc_cpu_type();
get_ppc_cpu_revision();
#ifdef SHOW_LCR1_REGISTER
l1cr = get_L1CR();
printk("Initial L1CR value = %x\n", l1cr);
#endif
ppc_exc_initialize();
/*
* 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_get_version_string() );
printk("-----------------------------------------\n");
BSP_mem_size = probeMemoryEnd();
/* 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;
/* P94 : 7455 clocks the TB/DECR at 1/4 of the system bus clock frequency */
BSP_time_base_divisor = 4000;
/* 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);
/* P94 : 7455 TB/DECR is clocked by the system bus clock frequency */
bsp_clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000);
/*
* 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);
}
/* 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
}
/*
* 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*/);
#ifdef SHOW_MORE_INIT_SETTINGS
printk("MSR %x \n", _read_MSR());
printk("Exit from bspstart\n");
#endif
}
RTEMS_SYSINIT_ITEM(
bsp_early,
RTEMS_SYSINIT_BSP_EARLY,
RTEMS_SYSINIT_ORDER_MIDDLE
);
void bsp_start( void )
{
/* Initialization was done by bsp_early() */
}
unsigned char ReadConfVPD_buff(int offset)
{
return(ConfVPD_buff[offset]);
}
RTEMS_SYSINIT_ITEM(
BSP_vme_config,
RTEMS_SYSINIT_BSP_PRE_DRIVERS,
RTEMS_SYSINIT_ORDER_MIDDLE
);
