/*
* 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 for mvme3100 by T. Straumann
*/
#include <string.h>
#include <stdlib.h>
#include <rtems.h>
#include <bsp.h>
#include <rtems/bspIo.h>
#include <rtems/counter.h>
#include <libcpu/spr.h>
#include <libcpu/io.h>
#include <libcpu/e500_mmu.h>
#include <bsp/uart.h>
#include <bsp/irq.h>
#include <bsp/pci.h>
#include <bsp/vpd.h>
#include <libcpu/cpuIdent.h>
#include <bsp/vectors.h>
#include <rtems/powerpc/powerpc.h>
#define SHOW_MORE_INIT_SETTINGS
#undef DEBUG
#define NumberOf(arr) (sizeof(arr)/sizeof(arr[0]))
#ifdef DEBUG
#define STATIC
#else
#define STATIC static
#endif
extern unsigned long __rtems_end[];
extern void BSP_vme_config(void);
extern void BSP_pciConfigDump_early( void );
extern unsigned ppc_exc_lock_std, ppc_exc_gpr3_std;
/*
* Copy Additional boot param passed by boot loader
*/
#define CMDLINE_BUF_SIZE 2048
static char cmdline_buf[CMDLINE_BUF_SIZE] = {0};
char *BSP_commandline_string = cmdline_buf;
/*
* Vital Board data Start using DATA RESIDUAL
*/
uint32_t bsp_clicks_per_usec = 0;
/*
* Total memory using RESIDUAL DATA
*/
unsigned int BSP_mem_size = 0;
/*
* PCI Bus Frequency
*/
unsigned int BSP_pci_bus_frequency = 0xdeadbeef;
/*
* PPC Bus Frequency
*/
unsigned int BSP_bus_frequency = 0;
/*
* processor clock frequency
*/
unsigned int BSP_processor_frequency = 0;
/*
* Time base divisior (how many tick for 1 second).
*/
unsigned int BSP_time_base_divisor = 8000; /* if external RTC clock unused (HID0) */
/* Board identification string */
char BSP_productIdent[20] = {0};
char BSP_serialNumber[20] = {0};
/* VPD appends an extra char -- what for ? */
char BSP_enetAddr0[7] = {0};
char BSP_enetAddr1[7] = {0};
char BSP_enetAddr2[7] = {0};
static void
prether(char *b, int idx)
{
int i;
printk("Ethernet %i %02X", idx, *b++);
for ( i=0; i<5; i++ )
printk(":%02X",*b++);
printk("\n");
}
BSP_output_char_function_type BSP_output_char = BSP_output_char_via_serial;
BSP_polling_getchar_function_type BSP_poll_char = NULL;
void BSP_panic(char *s)
{
printk("\n%s PANIC %s\n",_RTEMS_version, s);
__asm__ __volatile ("sc");
}
void _BSP_Fatal_error(unsigned int v)
{
printk("\n%s PANIC ERROR %x\n",_RTEMS_version, v);
__asm__ __volatile ("sc");
}
char *rtems_progname;
/*
* Use the shared implementations of the following routines
*/
char * save_boot_params(void* r3, void *r4, void* r5, char *additional_boot_options)
{
strncpy(cmdline_buf, additional_boot_options, CMDLINE_BUF_SIZE);
cmdline_buf[CMDLINE_BUF_SIZE - 1] ='\0';
return cmdline_buf;
}
#define CS_CONFIG_CS_EN (1<<31)
#define CS_BNDS_SA(x) ((((uint32_t)(x))>>(31-15)) & 0xff)
#define CS_BNDS_EA(x) ((((uint32_t)(x))>>(31-31)) & 0xff)
static inline uint32_t
_ccsr_rd32(uint32_t off)
{
return in_be32( (volatile unsigned *)(BSP_8540_CCSR_BASE + off) );
}
static inline void
_ccsr_wr32(uint32_t off, uint32_t val)
{
out_be32( (volatile unsigned *)(BSP_8540_CCSR_BASE + off), val );
}
STATIC uint32_t
BSP_get_mem_size( void )
{
int i;
uint32_t cs_bnds, cs_config;
uint32_t memsz=0;
uint32_t v;
for ( cs_bnds = 0x2000, cs_config=0x2080, i=0; i<4; i++, cs_bnds+=8, cs_config+=4 ) {
if ( CS_CONFIG_CS_EN & _ccsr_rd32( cs_config ) ) {
v = _ccsr_rd32( cs_bnds );
memsz += CS_BNDS_EA(v) - CS_BNDS_SA(v) + 1;
}
}
return memsz << 24;
}
STATIC void
BSP_calc_freqs( void )
{
uint32_t porpllsr = _ccsr_rd32( 0xe0000 );
unsigned plat_ratio = (porpllsr >> (31-30)) & 0x1f;
unsigned e500_ratio = (porpllsr >> (31-15)) & 0x3f;
switch ( plat_ratio ) {
case 2: case 3: case 4: case 5: case 6:
case 8: case 9: case 10: case 12: case 16:
/* supported ratios */
BSP_bus_frequency = BSP_pci_bus_frequency * plat_ratio;
break;
default:
BSP_panic("Unknown PLL sys-clock ratio; something's wrong here");
}
switch ( e500_ratio ) {
case 4: case 5: case 6: case 7:
BSP_processor_frequency = (BSP_pci_bus_frequency * e500_ratio) >> 1;
break;
default:
BSP_panic("Unknown PLL e500-clock ratio; something's wrong here");
}
printk("Core Complex Bus (CCB) Clock Freq: %10u Hz\n", BSP_bus_frequency);
printk("CPU Clock Freq: %10u Hz\n", BSP_processor_frequency);
}
void
bsp_predriver_hook(void)
{
/* Some drivers (RTC) may need i2c */
BSP_i2c_initialize();
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
#include <libcpu/spr.h>
SPR_RW(HID1)
void bsp_start( void )
{
unsigned char *stack;
uintptr_t intrStackStart;
uintptr_t intrStackSize;
char *chpt;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
int i;
E500_tlb_va_cache_t *tlb;
VpdBufRec vpdData [] = {
{ key: ProductIdent, instance: 0, buf: BSP_productIdent, buflen: sizeof(BSP_productIdent) - 1 },
{ key: SerialNumber, instance: 0, buf: BSP_serialNumber, buflen: sizeof(BSP_serialNumber) - 1 },
{ key: BusClockHz, instance: 0, buf: &BSP_pci_bus_frequency, buflen: sizeof(BSP_pci_bus_frequency) },
{ key: EthernetAddr, instance: 0, buf: BSP_enetAddr0, buflen: sizeof(BSP_enetAddr0) },
{ key: EthernetAddr, instance: 1, buf: BSP_enetAddr1, buflen: sizeof(BSP_enetAddr1) },
{ key: EthernetAddr, instance: 2, buf: BSP_enetAddr2, buflen: sizeof(BSP_enetAddr2) },
VPD_END
};
/* Intersperse messages with actions to help locate problems */
printk("-----------------------------------------\n");
/*
* 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...
*/
myCpu = get_ppc_cpu_type();
myCpuRevision = get_ppc_cpu_revision();
printk("Welcome to %s\n", _RTEMS_version);
printk("BSP: %s, CVS Release ($Name$)\n", "mvme3100");
/*
* 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.
*/
asm volatile("mr %0, 1":"=r"(stack));
/* tag the bottom */
*((uint32_t*)stack) = 0;
/*
* Initialize the interrupt related settings.
*/
intrStackStart = (uintptr_t) __rtems_end;
intrStackSize = rtems_configuration_get_interrupt_stack_size();
/*
* Initialize default raw exception handlers.
*/
ppc_exc_initialize(
PPC_INTERRUPT_DISABLE_MASK_DEFAULT,
intrStackStart,
intrStackSize
);
printk("CPU 0x%x - rev 0x%x\n", myCpu, myCpuRevision);
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Additionnal boot options are %s\n", BSP_commandline_string);
printk("Initial system stack at %x\n", stack);
printk("Software IRQ stack starts at %x with size %u\n", intrStackStart, intrStackSize);
#endif
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Going to start PCI buses scanning and initialization\n");
#endif
BSP_mem_size = BSP_get_mem_size();
{
/* memory-select errors were disabled in 'start.S';
* motload has all TLBs mapping a possible larger area as
* memory (not-guarded, caching-enabled) than actual physical
* memory is available.
* In case of speculative loads this may cause 'memory-select' errors
* which seem to raise 'core_fault_in' (found no description in
* the manual but I experienced this problem).
* Such errors (if HID1[RFXE] is clear) may *stall* execution
* leading to mysterious 'hangs'.
*
* Here we remove all mappings, re-enable memory-select
* errors and make sure we enable HID1[RFXE] to avoid
* stalls (since we don't implement handling individual
* error-handling interrupts).
*/
/* enable machine check for bad bus errors */
_write_HID1( _read_HID1() | 0x20000 );
rtems_e500_initlb();
for ( i=0, tlb=rtems_e500_tlb_va_cache; i<NumberOf(rtems_e500_tlb_va_cache); i++, tlb++ ) {
/* disable TLBs for caching-enabled, non-guarded areas
* beyond physical memory
*/
if ( tlb->att.v
&& 0xa != (tlb->att.wimge & 0xa)
&& (tlb->va.va_epn<<12) >= BSP_mem_size ) {
rtems_e500_clrtlb( E500_SELTLB_1 | i );
}
}
/* clear all pending memory errors */
_ccsr_wr32(0x2e40, 0xffffffff);
/* enable checking for memory-select errors */
_ccsr_wr32(0x2e44, _ccsr_rd32(0x2e44) & ~1 );
}
BSP_vpdRetrieveFields( vpdData );
printk("Board Type: %s (S/N %s)\n",
BSP_productIdent[0] ? BSP_productIdent : "n/a",
BSP_serialNumber[0] ? BSP_serialNumber : "n/a");
printk("External (=PCI Bus) Clock Freq ");
if ( 0xdeadbeef == BSP_pci_bus_frequency ) {
BSP_pci_bus_frequency = 66666666;
printk(" NOT FOUND in VPD; using %10u Hz\n",
BSP_pci_bus_frequency);
} else {
printk(": %10u Hz\n",
BSP_pci_bus_frequency);
}
/* Calculate CPU and CCB bus freqs */
BSP_calc_freqs();
pci_initialize();
prether(BSP_enetAddr0, 0);
prether(BSP_enetAddr1, 1);
prether(BSP_enetAddr2, 2);
/* need to tweak the motload setup */
BSP_motload_pci_fixup();
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Number of PCI buses found is : %d\n", pci_bus_count());
{
BSP_pciConfigDump_early();
}
#endif
if ( (chpt = strstr(BSP_commandline_string,"MEMSZ=")) ) {
char *endp;
uint32_t sz;
chpt+=6 /* strlen("MEMSZ=") */;
sz = strtoul(chpt, &endp, 0);
if ( endp != chpt )
BSP_mem_size = sz;
}
printk("Memory: %10u bytes\n", BSP_mem_size);
BSP_bus_frequency = 333333333;
BSP_processor_frequency = 833333333;
BSP_time_base_divisor = 8000; /* if external RTC clock unused (HID0) */
/* clear hostbridge errors but leave MCP disabled -
* PCI config space scanning code will trip otherwise :-(
*/
_BSP_clear_hostbridge_errors(0 /* enableMCP */, 0/*quiet*/);
bsp_clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000);
rtems_counter_initialize_converter(
BSP_bus_frequency / (BSP_time_base_divisor / 1000)
);
/*
* Initalize RTEMS IRQ system
*/
BSP_rtems_irq_mng_init(0);
if (1) {
int i;
unsigned msr,tcr;
asm volatile("mfmsr %0":"=r"(msr));
asm volatile("mftcr %0":"=r"(tcr));
printk("MSR is 0x%08x, TCR 0x%08x\n",msr,tcr);
asm volatile("mttcr %0"::"r"(0));
if (0) {
asm volatile("mtmsr %0"::"r"(msr|0x8000));
for (i=0; i<12; i++)
BSP_enable_irq_at_pic(i);
printk("IRQS enabled\n");
}
}
if (0) {
unsigned x;
asm volatile("mfivpr %0":"=r"(x));
printk("IVPR: 0x%08x\n",x);
asm volatile("mfivor8 %0":"=r"(x));
printk("IVOR8: 0x%08x\n",x);
printk("0x%08x\n",*(unsigned *)0xc00);
printk("0x%08x\n",*(unsigned *)0xc04);
printk("0x%08x\n",*(unsigned *)0xc08);
printk("0x%08x\n\n\n",*(unsigned *)0xc0c);
if (0) {
*(unsigned *)0xc08 = 0x4c000064;
asm volatile("dcbf 0, %0; icbi 0, %0; sync; isync"::"r"(0xc00));
}
printk("0x%08x\n", ppc_exc_lock_std);
printk("0x%08x\n", ppc_exc_gpr3_std);
asm volatile("sc");
printk("0x%08x\n", ppc_exc_lock_std);
printk("0x%08x\n", ppc_exc_gpr3_std);
}
printk("-----------------------------------------\n");
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Exit from bspstart\n");
#endif
}
