source: rtems/bsps/powerpc/beatnik/start/bspstart.c @ 54d87f2

5
Last change on this file since 54d87f2 was 54d87f2, checked in by Sebastian Huber <sebastian.huber@…>, on Sep 4, 2018 at 4:28:57 PM

bsps/powerpc: Simplify ppc_exc_initialize()

Remove parameters from ppc_exc_initialize() since all BSPs passed the
same values.

Update #3459.

  • Property mode set to 100644
File size: 10.2 KB
Line 
1/*
2 *  This routine does the bulk of the system initialization.
3 */
4
5/*
6 *  COPYRIGHT (c) 1989-1998.
7 *  On-Line Applications Research Corporation (OAR).
8 *
9 *  The license and distribution terms for this file may be
10 *  found in the file LICENSE in this distribution or at
11 *  http://www.OARcorp.com/rtems/license.html.
12 *
13 *  Modified to support the MCP750.
14 *  Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr
15 *
16 *  Modified to support the Synergy VGM & Motorola PowerPC boards.
17 *  (C) by Till Straumann, <strauman@slac.stanford.edu>, 2002, 2004, 2005
18 *
19 *  Modified to support the mvme5500 BSP
20 *  (C) by Kate Feng <feng1@bnl.gov>, 2003, 2004
21 *      under the contract DE-AC02-98CH10886 with the Deaprtment of Energy
22 *
23 *  T. Straumann: 2005-2007; stolen again for 'beatnik'...
24 */
25#include <string.h>
26#include <stdlib.h>
27#include <ctype.h>
28
29#include <rtems/system.h>
30#include <rtems/libio.h>
31#include <rtems/libcsupport.h>
32#include <rtems/bspIo.h>
33#include <rtems/counter.h>
34#include <rtems/powerpc/powerpc.h>
35#include <rtems/sysinit.h>
36/*#include <bsp/consoleIo.h>*/
37#include <libcpu/spr.h>   /* registers.h is included here */
38#include <bsp.h>
39#include <bsp/bootcard.h>
40#include <bsp/uart.h>
41#include <bsp/pci.h>
42#include <bsp/gtreg.h>
43#include <bsp/gt_timer.h>
44#include <libcpu/bat.h>
45#include <libcpu/pte121.h>
46#include <libcpu/cpuIdent.h>
47#include <bsp/vectors.h>
48#include <bsp/VME.h>
49#include <bsp/vpd.h>
50
51#define SHOW_MORE_INIT_SETTINGS
52
53BSP_output_char_function_type     BSP_output_char = BSP_output_char_via_serial;
54BSP_polling_getchar_function_type BSP_poll_char = NULL;
55
56extern Triv121PgTbl BSP_pgtbl_setup(unsigned int *);
57extern void BSP_pgtbl_activate(Triv121PgTbl);
58extern void BSP_motload_pci_fixup(void);
59
60extern unsigned long __rtems_end[];
61
62/* We really shouldn't use these since MMUoff also sets IP;
63 * nevertheless, during early init I don't care for now
64 */
65extern void MMUoff(void);
66extern void MMUon(void);
67
68extern uint32_t probeMemoryEnd(void);
69
70SPR_RW(SPRG0)
71SPR_RW(SPRG1)
72SPR_RO(HID1)
73
74/* Table of PLL multipliers for 7455/7457:
7501000   2     00010   7.5       00000   11.5      00001   17
7610000   3     11000   8         10111   12        00101   18
7710100   4     01100   8.5       11111   12.5      00111   20
7810110   5     01111   9         01011   13        01001   21
7910010   5.5   01110   9.5       11100   13.5      01101   24
8011010   6     10101   10        11001   14        11101   28
8101010   6.5   10001   10.5      00011   15        00110   bypass
8200100   7     10011   11        11011   16        11110   off
83*/
84
85/* Sorted according to CFG bits and multiplied by 2 it looks
86 * like this (note that this is in sequential order, not
87 * tabulated as above)
88 */
89signed char mpc7450PllMultByTwo[32] = {
9023,       34,           15,           30,
9114,       36,           2/*bypass*/,  40,
924,        42,           13,           26,
9317,       48,           19,           18,
946,        21,           11,           22,
958,        20,           10,           24,
9616,       28,           12,           32,
9727,       56,           0/*off*/,     25,
98};
99
100uint32_t bsp_clicks_per_usec         = 0;
101
102/*
103 * Total memory using probing.
104 */
105unsigned int BSP_mem_size;
106
107/*
108 * PCI Bus Frequency
109 */
110unsigned int BSP_bus_frequency       = 0xdeadbeef;
111/*
112 * processor clock frequency
113 */
114unsigned int BSP_processor_frequency = 0xdeadbeef;
115
116/*
117 * Time base divisior (bus freq / TB clock)
118 */
119unsigned int BSP_time_base_divisor   = 4000; /* most 604+ CPUs seem to use this */
120
121/* Board identification string */
122char BSP_productIdent[20] = {0};
123char BSP_serialNumber[20] = {0};
124
125/* VPD appends an extra char -- what for ? */
126char BSP_enetAddr0[7] = {0};
127char BSP_enetAddr1[7] = {0};
128
129char *rtems_progname;
130
131#define CMDLINE_BUF_SIZE        2048
132
133static char cmdline_buf[CMDLINE_BUF_SIZE];
134char *BSP_commandline_string = cmdline_buf;
135
136/* this routine is called early and must be safe with a not properly
137 * aligned stack
138 */
139char *save_boot_params(
140  void *r3,
141  void *r4,
142  void *r5,
143  char *cmdline_start,
144  char *cmdline_end
145)
146{
147int             i=cmdline_end-cmdline_start;
148        if ( i >= CMDLINE_BUF_SIZE )
149                i = CMDLINE_BUF_SIZE-1;
150        else if ( i < 0 )
151                i = 0;
152        memmove(cmdline_buf, cmdline_start, i);
153        cmdline_buf[i]=0;
154    return cmdline_buf;
155}
156
157static BSP_BoardType    board_type = Unknown;
158
159BSP_BoardType
160BSP_getBoardType( void )
161{
162        return board_type;
163}
164
165uint32_t _CPU_Counter_frequency(void)
166{
167  return BSP_bus_frequency / (BSP_time_base_divisor / 1000);
168}
169
170/*
171 *  bsp_start
172 *
173 *  This routine does the bulk of the system initialization.
174 */
175
176void bsp_start( void )
177{
178  unsigned char  *stack;
179  char           *chpt;
180
181  Triv121PgTbl  pt=0;
182
183  VpdBufRec vpdData [] = {
184        { key: ProductIdent, instance: 0, buf: BSP_productIdent, buflen: sizeof(BSP_productIdent) - 1 },
185        { key: SerialNumber, instance: 0, buf: BSP_serialNumber, buflen: sizeof(BSP_serialNumber) - 1 },
186        { key: CpuClockHz,   instance: 0, buf: &BSP_processor_frequency, buflen: sizeof(BSP_processor_frequency)  },
187        { key: BusClockHz,   instance: 0, buf: &BSP_bus_frequency, buflen: sizeof(BSP_bus_frequency)  },
188        { key: EthernetAddr, instance: 0, buf: BSP_enetAddr0, buflen: sizeof(BSP_enetAddr0) },
189        { key: EthernetAddr, instance: 1, buf: BSP_enetAddr1, buflen: sizeof(BSP_enetAddr1) },
190        VPD_END
191  };
192
193  /* T. Straumann: 4/2005
194   *
195   * Need to map the system registers early, so we can printk...
196   * (otherwise we silently die)
197   */
198  /* map the PCI 0, 1 Domain I/O space, GT64260B registers
199   * and the reserved area so that the size is the power of 2.
200   */
201  setdbat(7, BSP_DEV_AND_PCI_IO_BASE, BSP_DEV_AND_PCI_IO_BASE, BSP_DEV_AND_PCI_IO_SIZE, IO_PAGE);
202
203  /* Intersperse messages with actions to help locate problems */
204  printk("-----------------------------------------\n");
205
206  /*
207   * Get CPU identification dynamically. Note that the get_ppc_cpu_type() & friends functions
208   * store the result in global variables so that it can be used latter...
209   * This also verifies that we run on a known CPU.
210   */
211  get_ppc_cpu_type();
212  get_ppc_cpu_revision();
213
214  /* Make sure we detect a known host bridge */
215  BSP_getDiscoveryVersion(/* assert detection */ 1);
216
217  printk("Welcome to RTEMS %s\n", _RTEMS_version );
218
219  /* Leave all caches as MotLoad left them. Seems to be fine */
220
221  /*
222   * the initial stack  has aready been set to this value in start.S
223   * so there is no need to set it in r1 again... It is just for info
224   * so that it can be printed without accessing R1.
225   */
226  __asm__ volatile("mr %0, 1":"=r"(stack));
227
228  /* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
229
230  *((uint32_t *)stack) = 0;
231
232  ppc_exc_initialize();
233
234  printk("CPU: %s\n", get_ppc_cpu_type_name(current_ppc_cpu));
235
236  /*
237   * Initialize RTEMS IRQ system
238   */
239   BSP_rtems_irq_mng_init(0);
240
241  BSP_vpdRetrieveFields(vpdData);
242
243  if ( !strncmp(BSP_productIdent,"MVME5500",8) )
244        board_type = MVME5500;
245  else if ( !strncmp(BSP_productIdent,"MVME6100",8) )
246        board_type = MVME6100;
247
248  printk("Board Type: %s (S/N %s)\n",
249                BSP_productIdent[0] ? BSP_productIdent : "n/a",
250                BSP_serialNumber[0] ? BSP_serialNumber : "n/a");
251
252  if ( 0xdeadbeef == BSP_bus_frequency ) {
253        BSP_bus_frequency       = 133333333;
254        printk("Bus Clock Freq NOT FOUND in VPD; using %10u Hz\n",
255                BSP_bus_frequency);
256  } else {
257        printk("Bus Clock Freq:  %10u Hz\n",
258                BSP_bus_frequency);
259  }
260
261  if ( 0xdeadbeef == BSP_processor_frequency ) {
262        BSP_processor_frequency  = BSP_bus_frequency/2;
263        BSP_processor_frequency *= mpc7450PllMultByTwo[ (_read_HID1() >> (31-19)) & 31 ];
264  }
265  printk("CPU Clock Freq:  %10u Hz\n", BSP_processor_frequency);
266       
267  /* probe real memory size; if it's more than 256M we can't currently access it
268   * since at this point only BAT-0 maps 0..256M
269   */
270  BSP_mem_size                          =  probeMemoryEnd();
271
272  if ( (chpt = strstr(BSP_commandline_string,"MEMSZ=")) ) {
273                char            *endp;
274                uint32_t        sz;
275                chpt+=6 /* strlen("MEMSZ=") */;
276                sz = strtoul(chpt, &endp, 0);
277                if ( endp != chpt )
278                        BSP_mem_size = sz;
279  }
280
281  printk("Memory:          %10u bytes\n", BSP_mem_size);
282
283  if ( BSP_mem_size > 0x10000000 ) {
284        uint32_t s;
285        if ( BSP_mem_size > 0x80000000 ) {
286                BSP_mem_size = 0x80000000;
287                printk("Memory clipped to 0x%08x for now, sorry\n", BSP_mem_size);
288        }
289        for ( s = 0x20000000; s < BSP_mem_size ; s<<=1)
290                ;
291        MMUoff();
292        /* since it's currently in use we must first surrender it */
293        setdbat(0, 0, 0, 0, 0);
294        setdbat(0, 0, 0, s, _PAGE_RW);
295        MMUon();
296  }
297
298  printk("-----------------------------------------\n");
299
300  /* Maybe not setup yet because of the warning message */
301
302  /* Allocate and set up the page table mappings
303   * This is only available on >604 CPUs.
304   *
305   * NOTE: This setup routine may modify the available memory
306   *       size. It is essential to call it before
307   *       calculating the workspace etc.
308   */
309  pt = BSP_pgtbl_setup(&BSP_mem_size);
310  if (!pt)
311     printk("WARNING: unable to setup page tables.\n");
312
313#ifdef SHOW_MORE_INIT_SETTINGS
314  printk("Now BSP_mem_size = 0x%x\n",BSP_mem_size); 
315#endif
316
317  /*
318   * Set up our hooks
319   */
320
321  bsp_clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000);
322
323#ifdef SHOW_MORE_INIT_SETTINGS
324  printk(
325    "Configuration.work_space_size = %x\n",
326    rtems_configuration_get_work_space_size()
327  );
328#endif
329
330  /* Activate the page table mappings only after
331   * initializing interrupts because the irq_mng_init()
332   * routine needs to modify the text
333   */           
334  if ( pt ) {
335#ifdef SHOW_MORE_INIT_SETTINGS
336    printk("Page table setup finished; will activate it NOW...\n");
337#endif
338    BSP_pgtbl_activate(pt);
339  }
340
341#ifdef SHOW_MORE_INIT_SETTINGS
342  printk("Going to start PCI buses scanning and initialization\n");
343#endif
344  BSP_pci_initialize();
345
346  /* need to tweak the motload setup */
347  BSP_motload_pci_fixup();
348
349  /* map 512M, 256 for PCI 256 for VME */
350  setdbat(5,BSP_PCI_HOSE0_MEM_BASE, BSP_PCI_HOSE0_MEM_BASE, BSP_PCI_HOSE0_MEM_SIZE, IO_PAGE);
351  setdbat(6,BSP_PCI_HOSE1_MEM_BASE, BSP_PCI_HOSE1_MEM_BASE, 0x10000000, IO_PAGE);
352
353#ifdef SHOW_MORE_INIT_SETTINGS
354  printk("Number of PCI buses found is : %d\n", pci_bus_count());
355#endif
356
357  /*
358   * Initialize hardware timer facility (not used by BSP itself)
359   * Needs PCI to identify discovery version...
360   */
361  BSP_timers_initialize();
362
363#ifdef SHOW_MORE_INIT_SETTINGS
364  printk("MSR 0x%lx \n", _read_MSR());
365  printk("Exit from bspstart\n");
366#endif
367}
368
369RTEMS_SYSINIT_ITEM(
370  BSP_vme_config,
371  RTEMS_SYSINIT_BSP_PRE_DRIVERS,
372  RTEMS_SYSINIT_ORDER_MIDDLE
373);
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