ArmRealViewEbPkg/Include/ArmEb/ArmEbTimer.h

   1 /*++
   2
   3 Copyright (c) 2009, Hewlett-Packard Company. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   Timer.h
  15
  16 Abstract:
  17
  18   Driver implementing the EFI 2.0 timer protocol using the ARM SP804 timer.
  19
  20 --*/
  21
  22 #ifndef _TIMER_SP804_H__
  23 #define _TIMER_SP804_H__
  24
  25
  26
  27 // EB board constants
  28 #define EB_SP810_CTRL_BASE            0x10001000
  29 #define EB_SP804_TIMER0_BASE          0x10011000
  30 #define EB_SP804_TIMER1_BASE          0x10011020
  31 #define EB_SP804_TIMER2_BASE          0x10012000
  32 #define EB_SP804_TIMER3_BASE          0x10012020
  33
  34 #define EB_TIMER01_INTERRUPT_NUM      36
  35 #define EB_TIMER23_INTERRUPT_NUM      37
  36
  37 // SP804 Timer constants
  38 #define SP804_TIMER_LOAD_REG          0x00
  39 #define SP804_TIMER_CURRENT_REG       0x04
  40 #define SP804_TIMER_CONTROL_REG       0x08
  41 #define SP804_TIMER_INT_CLR_REG       0x0C
  42 #define SP804_TIMER_RAW_INT_STS_REG   0x10
  43 #define SP804_TIMER_MSK_INT_STS_REG   0x14
  44 #define SP804_TIMER_BG_LOAD_REG       0x18
  45
  46 // Timer control register bit definitions
  47 #define SP804_TIMER_CTRL_ONESHOT        BIT0
  48 #define SP804_TIMER_CTRL_32BIT          BIT1
  49 #define SP804_TIMER_CTRL_PRESCALE_MASK  (BIT3|BIT2)
  50 #define SP804_PRESCALE_DIV_1            0
  51 #define SP804_PRESCALE_DIV_16           BIT2
  52 #define SP804_PRESCALE_DIV_256          BIT3
  53 #define SP804_TIMER_CTRL_INT_ENABLE     BIT5
  54 #define SP804_TIMER_CTRL_PERIODIC       BIT6
  55 #define SP804_TIMER_CTRL_ENABLE         BIT7
  56
  57 // SP810 System Controller constants
  58 #define SP810_SYS_CTRL_REG              0x00
  59 #define SP810_SYS_CTRL_TIMER0_TIMCLK    BIT15 // 0=REFCLK, 1=TIMCLK
  60 #define SP810_SYS_CTRL_TIMER0_EN        BIT16
  61 #define SP810_SYS_CTRL_TIMER1_TIMCLK    BIT17 // 0=REFCLK, 1=TIMCLK
  62 #define SP810_SYS_CTRL_TIMER1_EN        BIT18
  63 #define SP810_SYS_CTRL_TIMER2_TIMCLK    BIT19 // 0=REFCLK, 1=TIMCLK
  64 #define SP810_SYS_CTRL_TIMER2_EN        BIT20
  65 #define SP810_SYS_CTRL_TIMER3_TIMCLK    BIT21 // 0=REFCLK, 1=TIMCLK
  66 #define SP810_SYS_CTRL_TIMER3_EN        BIT22
  67
  68 // default timer tick period - 1ms, or 10000 units of 100ns
  69 //#define TIMER_DEFAULT_PERIOD            10000
  70
  71 // default timer tick period - 50ms, or 500000 units of 100ns
  72 #define TIMER_DEFAULT_PERIOD            500000
  73
  74 // default timer tick period - 500ms, or 5000000 units of 100ns
  75 //#define TIMER_DEFAULT_PERIOD            5000000
  76
  77 #endif
  78