arch/arm/mach-bcmring/include/csp/reg.h

   1 /*****************************************************************************
   2 * Copyright 2003 - 2008 Broadcom Corporation.  All rights reserved.
   3 *
   4 * Unless you and Broadcom execute a separate written software license
   5 * agreement governing use of this software, this software is licensed to you
   6 * under the terms of the GNU General Public License version 2, available at
   7 * http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
   8 *
   9 * Notwithstanding the above, under no circumstances may you combine this
  10 * software in any way with any other Broadcom software provided under a
  11 * license other than the GPL, without Broadcom's express prior written
  12 * consent.
  13 *****************************************************************************/
  14
  15 /****************************************************************************/
  16 /**
  17 *  @file    reg.h
  18 *
  19 *  @brief   Generic register defintions used in CSP
  20 */
  21 /****************************************************************************/
  22
  23 #ifndef CSP_REG_H
  24 #define CSP_REG_H
  25
  26 /* ---- Include Files ---------------------------------------------------- */
  27
  28 #include <csp/stdint.h>
  29
  30 /* ---- Public Constants and Types --------------------------------------- */
  31
  32 #define __REG32(x)      (*((volatile uint32_t *)(x)))
  33 #define __REG16(x)      (*((volatile uint16_t *)(x)))
  34 #define __REG8(x)       (*((volatile uint8_t *) (x)))
  35
  36 /* Macros used to define a sequence of reserved registers. The start / end */
  37 /* are byte offsets in the particular register definition, with the "end" */
  38 /* being the offset of the next un-reserved register. E.g. if offsets */
  39 /* 0x10 through to 0x1f are reserved, then this reserved area could be */
  40 /* specified as follows. */
  41 /*  typedef struct */
  42 /*  { */
  43 /*      uint32_t reg1;           offset 0x00 */
  44 /*      uint32_t reg2;           offset 0x04 */
  45 /*      uint32_t reg3;           offset 0x08 */
  46 /*      uint32_t reg4;           offset 0x0c */
  47 /*      REG32_RSVD(0x10, 0x20); */
  48 /*      uint32_t reg5;           offset 0x20 */
  49 /*      ... */
  50 /*  } EXAMPLE_REG_t; */
  51 #define REG8_RSVD(start, end)   uint8_t rsvd_##start[(end - start) / sizeof(uint8_t)]
  52 #define REG16_RSVD(start, end)  uint16_t rsvd_##start[(end - start) / sizeof(uint16_t)]
  53 #define REG32_RSVD(start, end)  uint32_t rsvd_##start[(end - start) / sizeof(uint32_t)]
  54
  55 /* ---- Public Variable Externs ------------------------------------------ */
  56 /* ---- Public Function Prototypes --------------------------------------- */
  57
  58 /* Note: When protecting multiple statements, the REG_LOCAL_IRQ_SAVE and */
  59 /* REG_LOCAL_IRQ_RESTORE must be enclosed in { } to allow the  */
  60 /* flags variable to be declared locally. */
  61 /* e.g. */
  62 /*    statement1; */
  63 /*    { */
  64 /*       REG_LOCAL_IRQ_SAVE; */
  65 /*       <multiple statements here> */
  66 /*       REG_LOCAL_IRQ_RESTORE; */
  67 /*    } */
  68 /*    statement2; */
  69 /*  */
  70
  71 #if defined(__KERNEL__) && !defined(STANDALONE)
  72 #include <mach/hardware.h>
  73 #include <linux/interrupt.h>
  74
  75 #define REG_LOCAL_IRQ_SAVE      HW_DECLARE_SPINLOCK(reg32) \
  76         unsigned long flags; HW_IRQ_SAVE(reg32, flags)
  77
  78 #define REG_LOCAL_IRQ_RESTORE   HW_IRQ_RESTORE(reg32, flags)
  79
  80 #else
  81
  82 #define REG_LOCAL_IRQ_SAVE
  83 #define REG_LOCAL_IRQ_RESTORE
  84
  85 #endif
  86
  87 static inline void reg32_modify_and(volatile uint32_t *reg, uint32_t value)
  88 {
  89         REG_LOCAL_IRQ_SAVE;
  90         *reg &= value;
  91         REG_LOCAL_IRQ_RESTORE;
  92 }
  93
  94 static inline void reg32_modify_or(volatile uint32_t *reg, uint32_t value)
  95 {
  96         REG_LOCAL_IRQ_SAVE;
  97         *reg |= value;
  98         REG_LOCAL_IRQ_RESTORE;
  99 }
 100
 101 static inline void reg32_modify_mask(volatile uint32_t *reg, uint32_t mask,
 102                                      uint32_t value)
 103 {
 104         REG_LOCAL_IRQ_SAVE;
 105         *reg = (*reg & mask) | value;
 106         REG_LOCAL_IRQ_RESTORE;
 107 }
 108
 109 static inline void reg32_write(volatile uint32_t *reg, uint32_t value)
 110 {
 111         *reg = value;
 112 }
 113
 114 #endif /* CSP_REG_H */