[41c9282] | 1 | /* |
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| 2 | * Clock Tick Device Driver |
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| 3 | * |
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| 4 | * This routine initializes LEON timer 1 which used for the clock tick. |
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| 5 | * |
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| 6 | * The tick frequency is directly programmed to the configured number of |
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| 7 | * microseconds per tick. |
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| 8 | * |
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[29d1fce] | 9 | * COPYRIGHT (c) 1989-2006. |
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[41c9282] | 10 | * On-Line Applications Research Corporation (OAR). |
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| 11 | * |
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| 12 | * Modified for LEON3 BSP. |
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| 13 | * COPYRIGHT (c) 2004. |
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| 14 | * Gaisler Research. |
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| 15 | * |
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| 16 | * The license and distribution terms for this file may be |
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| 17 | * found in the file LICENSE in this distribution or at |
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| 18 | * http://www.rtems.com/license/LICENSE. |
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| 19 | */ |
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| 20 | |
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| 21 | #include <bsp.h> |
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[29d1fce] | 22 | #include <bspopts.h> |
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[1f7cfbe3] | 23 | #include <ambapp.h> |
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[29d1fce] | 24 | |
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| 25 | #if SIMSPARC_FAST_IDLE==1 |
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[d473dc0] | 26 | #define CLOCK_DRIVER_USE_FAST_IDLE 1 |
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[29d1fce] | 27 | #endif |
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[41c9282] | 28 | |
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| 29 | /* |
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| 30 | * The Real Time Clock Counter Timer uses this trap type. |
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| 31 | */ |
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| 32 | |
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[7f3c6ce] | 33 | #if defined(RTEMS_MULTIPROCESSING) |
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| 34 | #define LEON3_CLOCK_INDEX \ |
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| 35 | (rtems_configuration_get_user_multiprocessing_table() ? LEON3_Cpu_Index : 0) |
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| 36 | #else |
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| 37 | #define LEON3_CLOCK_INDEX 0 |
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[44b06ca] | 38 | #endif |
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[7f3c6ce] | 39 | |
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[226d48d8] | 40 | volatile struct gptimer_regs *LEON3_Timer_Regs = 0; |
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[41c9282] | 41 | static int clkirq; |
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| 42 | |
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[29d1fce] | 43 | #define CLOCK_VECTOR LEON_TRAP_TYPE( clkirq ) |
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| 44 | |
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| 45 | #define Clock_driver_support_at_tick() |
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| 46 | |
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[7f3c6ce] | 47 | #if defined(RTEMS_MULTIPROCESSING) |
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| 48 | #define Adjust_clkirq_for_node() \ |
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| 49 | do { \ |
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| 50 | if (rtems_configuration_get_user_multiprocessing_table() != NULL) { \ |
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| 51 | clkirq += LEON3_Cpu_Index; \ |
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| 52 | } \ |
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| 53 | } while(0) |
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| 54 | #else |
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[4fa6be9] | 55 | #define Adjust_clkirq_for_node() do { clkirq += LEON3_CLOCK_INDEX; } while(0) |
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[7f3c6ce] | 56 | #endif |
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| 57 | |
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[7579e25] | 58 | #ifndef LEON3_QEMU |
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[29d1fce] | 59 | #define Clock_driver_support_find_timer() \ |
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[921bb59] | 60 | do { \ |
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[1f7cfbe3] | 61 | struct ambapp_dev *adev; \ |
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[29d1fce] | 62 | \ |
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[1f7cfbe3] | 63 | /* Find first LEON3 GP Timer */ \ |
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| 64 | adev = (void *)ambapp_for_each(&ambapp_plb, (OPTIONS_ALL|OPTIONS_APB_SLVS),\ |
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| 65 | VENDOR_GAISLER, GAISLER_GPTIMER, ambapp_find_by_idx, NULL); \ |
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| 66 | if (adev) { \ |
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[30a8915] | 67 | /* Found APB GPTIMER Timer */ \ |
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[226d48d8] | 68 | LEON3_Timer_Regs = (volatile struct gptimer_regs *) \ |
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[1f7cfbe3] | 69 | DEV_TO_APB(adev)->start; \ |
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[226d48d8] | 70 | clkirq = (LEON3_Timer_Regs->cfg & 0xf8) >> 3; \ |
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[921bb59] | 71 | \ |
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[7f3c6ce] | 72 | Adjust_clkirq_for_node(); \ |
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[29d1fce] | 73 | } \ |
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| 74 | } while (0) |
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[7579e25] | 75 | #else /* LEON3_QEMU */ |
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| 76 | #define Clock_driver_support_find_timer() \ |
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| 77 | do { \ |
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| 78 | LEON3_Timer_Regs = (volatile struct gptimer_regs *) \ |
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| 79 | 0x80000300; \ |
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| 80 | clkirq = 6; \ |
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| 81 | } while (0) |
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| 82 | #endif /* LEON3_QEMU */ |
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[29d1fce] | 83 | |
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| 84 | #define Clock_driver_support_install_isr( _new, _old ) \ |
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| 85 | do { \ |
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| 86 | _old = set_vector( _new, CLOCK_VECTOR, 1 ); \ |
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| 87 | } while(0) |
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| 88 | |
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[7579e25] | 89 | #ifndef LEON3_QEMU |
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[29d1fce] | 90 | #define Clock_driver_support_initialize_hardware() \ |
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| 91 | do { \ |
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| 92 | LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].reload = \ |
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[12bd47e] | 93 | rtems_configuration_get_microseconds_per_tick() - 1; \ |
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[29d1fce] | 94 | \ |
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[226d48d8] | 95 | LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].ctrl = \ |
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[29d1fce] | 96 | LEON3_GPTIMER_EN | LEON3_GPTIMER_RL | \ |
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| 97 | LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN; \ |
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| 98 | } while (0) |
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[7579e25] | 99 | #else |
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| 100 | #define Clock_driver_support_initialize_hardware() \ |
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| 101 | do { \ |
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| 102 | LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].reload = \ |
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| 103 | 40 * (rtems_configuration_get_microseconds_per_tick() - 1); \ |
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| 104 | \ |
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| 105 | LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].ctrl = \ |
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| 106 | LEON3_GPTIMER_EN | LEON3_GPTIMER_RL | \ |
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| 107 | LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN; \ |
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| 108 | } while (0) |
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| 109 | #endif |
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[29d1fce] | 110 | |
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| 111 | #define Clock_driver_support_shutdown_hardware() \ |
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| 112 | do { \ |
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| 113 | LEON_Mask_interrupt(LEON_TRAP_TYPE(clkirq)); \ |
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[226d48d8] | 114 | LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].ctrl = 0; \ |
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[29d1fce] | 115 | } while (0) |
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| 116 | |
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[876af7a] | 117 | static uint32_t bsp_clock_nanoseconds_since_last_tick(void) |
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[0e58c4f] | 118 | { |
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| 119 | uint32_t clicks; |
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[b3559ee9] | 120 | uint32_t usecs; |
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| 121 | |
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[0e58c4f] | 122 | if ( !LEON3_Timer_Regs ) |
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| 123 | return 0; |
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| 124 | |
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[7579e25] | 125 | #ifndef LEON3_QEMU |
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[4fa6be9] | 126 | clicks = LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].value; |
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[7579e25] | 127 | #else |
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| 128 | clicks = LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].value / 40; |
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| 129 | #endif |
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[0e58c4f] | 130 | |
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[b3559ee9] | 131 | if ( LEON_Is_interrupt_pending( clkirq ) ) { |
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[4fa6be9] | 132 | clicks = LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].value; |
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[b3559ee9] | 133 | usecs = (2*rtems_configuration_get_microseconds_per_tick() - clicks); |
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| 134 | } else { |
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| 135 | usecs = (rtems_configuration_get_microseconds_per_tick() - clicks); |
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| 136 | } |
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| 137 | return usecs * 1000; |
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[0e58c4f] | 138 | } |
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| 139 | |
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[b3559ee9] | 140 | #define Clock_driver_nanoseconds_since_last_tick \ |
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| 141 | bsp_clock_nanoseconds_since_last_tick |
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[0e58c4f] | 142 | |
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[8ce272b] | 143 | #include "../../../shared/clockdrv_shell.h" |
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