source: rtems/c/src/lib/libbsp/sparc/leon3/clock/ckinit.c @ 29d1fce

4.104.114.84.95
Last change on this file since 29d1fce was 29d1fce, checked in by Joel Sherrill <joel.sherrill@…>, on 11/16/06 at 16:31:36

2006-11-16 Joel Sherrill <joel@…>

  • clock/ckinit.c, startup/bspstart.c: Use common clock driver template and eliminate all fast idle code specific to this BSP. This eliminates a fair amount of code in the BSP clock driver and bsp_startup. The LEON3 has to do a scan of the AMBA bus to find the timer so I added the new hook Clock_driver_support_find_timer to support this. In general, there was some clean up to the file headers of various files.
  • Property mode set to 100644
File size: 2.5 KB
Line 
1/*
2 *  Clock Tick Device Driver
3 *
4 *  This routine initializes LEON timer 1 which used for the clock tick.
5 *
6 *  The tick frequency is directly programmed to the configured number of
7 *  microseconds per tick.
8 *
9 *  COPYRIGHT (c) 1989-2006.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  Modified for LEON3 BSP.
13 *  COPYRIGHT (c) 2004.
14 *  Gaisler Research.
15 *
16 *  The license and distribution terms for this file may be
17 *  found in the file LICENSE in this distribution or at
18 *  http://www.rtems.com/license/LICENSE.
19 *
20 *  $Id$
21 */
22
23#include <bsp.h>
24#include <bspopts.h>
25
26#if SIMSPARC_FAST_IDLE==1
27#define CLOCK_DRIVER_USE_FAST_IDLE
28#endif
29
30/*
31 *  The Real Time Clock Counter Timer uses this trap type.
32 */
33
34extern rtems_configuration_table Configuration;
35
36#define LEON3_CLOCK_INDEX \
37  (Configuration.User_multiprocessing_table ? LEON3_Cpu_Index : 0)
38
39volatile LEON3_Timer_Regs_Map *LEON3_Timer_Regs = 0;
40static int clkirq;
41
42#define CLOCK_VECTOR LEON_TRAP_TYPE( clkirq )
43
44#define Clock_driver_support_at_tick()
45
46#define Clock_driver_support_find_timer() \
47  do {  \
48    int i; \
49    unsigned int iobar, conf; \
50    \
51    /* Find GP Timer */ \
52    i = 0; \
53    while (i < amba_conf.apbslv.devnr) { \
54      conf = amba_get_confword(amba_conf.apbslv, i, 0); \
55      if ((amba_vendor(conf) == VENDOR_GAISLER) && \
56          (amba_device(conf) == GAISLER_GPTIMER)) { \
57        iobar = amba_apb_get_membar(amba_conf.apbslv, i);       \
58        LEON3_Timer_Regs = (volatile LEON3_Timer_Regs_Map *) \
59           amba_iobar_start(amba_conf.apbmst, iobar); \
60        break; \
61      } \
62      i++; \
63    } \
64    \
65    clkirq = (LEON3_Timer_Regs->status & 0xfc) >> 3; \
66    \
67    /* MP */ \
68    if (Configuration.User_multiprocessing_table != NULL) { \
69      clkirq += LEON3_Cpu_Index; \
70    } \
71  } while (0)
72
73#define Clock_driver_support_install_isr( _new, _old ) \
74  do { \
75    _old = set_vector( _new, CLOCK_VECTOR, 1 ); \
76  } while(0)
77
78#define Clock_driver_support_initialize_hardware() \
79  do { \
80    LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].reload = \
81      BSP_Configuration.microseconds_per_tick - 1; \
82    \
83    LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].conf = \
84      LEON3_GPTIMER_EN | LEON3_GPTIMER_RL | \
85        LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN; \
86  } while (0)
87
88#define Clock_driver_support_shutdown_hardware() \
89  do { \
90    LEON_Mask_interrupt(LEON_TRAP_TYPE(clkirq)); \
91    LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].conf = 0; \
92  } while (0)
93
94#include "../../../shared/clockdrv_shell.c"
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