arch/arm/include/asm/v7m.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Common defines for v7m cpus
   4  */
   5 #define V7M_SCS_ICTR                    IOMEM(0xe000e004)
   6 #define V7M_SCS_ICTR_INTLINESNUM_MASK           0x0000000f
   7
   8 #define BASEADDR_V7M_SCB                IOMEM(0xe000ed00)
   9
  10 #define V7M_SCB_CPUID                   0x00
  11
  12 #define V7M_SCB_ICSR                    0x04
  13 #define V7M_SCB_ICSR_PENDSVSET                  (1 << 28)
  14 #define V7M_SCB_ICSR_PENDSVCLR                  (1 << 27)
  15 #define V7M_SCB_ICSR_RETTOBASE                  (1 << 11)
  16
  17 #define V7M_SCB_VTOR                    0x08
  18
  19 #define V7M_SCB_AIRCR                   0x0c
  20 #define V7M_SCB_AIRCR_VECTKEY                   (0x05fa << 16)
  21 #define V7M_SCB_AIRCR_SYSRESETREQ               (1 << 2)
  22
  23 #define V7M_SCB_SCR                     0x10
  24 #define V7M_SCB_SCR_SLEEPDEEP                   (1 << 2)
  25
  26 #define V7M_SCB_CCR                     0x14
  27 #define V7M_SCB_CCR_STKALIGN                    (1 << 9)
  28 #define V7M_SCB_CCR_DC                          (1 << 16)
  29 #define V7M_SCB_CCR_IC                          (1 << 17)
  30 #define V7M_SCB_CCR_BP                          (1 << 18)
  31
  32 #define V7M_SCB_SHPR2                   0x1c
  33 #define V7M_SCB_SHPR3                   0x20
  34
  35 #define V7M_SCB_SHCSR                   0x24
  36 #define V7M_SCB_SHCSR_USGFAULTENA               (1 << 18)
  37 #define V7M_SCB_SHCSR_BUSFAULTENA               (1 << 17)
  38 #define V7M_SCB_SHCSR_MEMFAULTENA               (1 << 16)
  39
  40 #define V7M_xPSR_FRAMEPTRALIGN                  0x00000200
  41 #define V7M_xPSR_EXCEPTIONNO                    0x000001ff
  42
  43 /*
  44  * When branching to an address that has bits [31:28] == 0xf an exception return
  45  * occurs. Bits [27:5] are reserved (SBOP). If the processor implements the FP
  46  * extension Bit [4] defines if the exception frame has space allocated for FP
  47  * state information, SBOP otherwise. Bit [3] defines the mode that is returned
  48  * to (0 -> handler mode; 1 -> thread mode). Bit [2] defines which sp is used
  49  * (0 -> msp; 1 -> psp). Bits [1:0] are fixed to 0b01.
  50  */
  51 #define EXC_RET_STACK_MASK                      0x00000004
  52 #define EXC_RET_THREADMODE_PROCESSSTACK         0xfffffffd
  53
  54 /* Cache related definitions */
  55
  56 #define V7M_SCB_CLIDR           0x78    /* Cache Level ID register */
  57 #define V7M_SCB_CTR             0x7c    /* Cache Type register */
  58 #define V7M_SCB_CCSIDR          0x80    /* Cache size ID register */
  59 #define V7M_SCB_CSSELR          0x84    /* Cache size selection register */
  60
  61 /* Memory-mapped MPU registers for M-class */
  62 #define MPU_TYPE                0x90
  63 #define MPU_CTRL                0x94
  64 #define MPU_CTRL_ENABLE         1
  65 #define MPU_CTRL_PRIVDEFENA     (1 << 2)
  66
  67 #define MPU_RNR                 0x98
  68 #define MPU_RBAR                0x9c
  69 #define MPU_RASR                0xa0
  70
  71 /* Cache opeartions */
  72 #define V7M_SCB_ICIALLU         0x250   /* I-cache invalidate all to PoU */
  73 #define V7M_SCB_ICIMVAU         0x258   /* I-cache invalidate by MVA to PoU */
  74 #define V7M_SCB_DCIMVAC         0x25c   /* D-cache invalidate by MVA to PoC */
  75 #define V7M_SCB_DCISW           0x260   /* D-cache invalidate by set-way */
  76 #define V7M_SCB_DCCMVAU         0x264   /* D-cache clean by MVA to PoU */
  77 #define V7M_SCB_DCCMVAC         0x268   /* D-cache clean by MVA to PoC */
  78 #define V7M_SCB_DCCSW           0x26c   /* D-cache clean by set-way */
  79 #define V7M_SCB_DCCIMVAC        0x270   /* D-cache clean and invalidate by MVA to PoC */
  80 #define V7M_SCB_DCCISW          0x274   /* D-cache clean and invalidate by set-way */
  81 #define V7M_SCB_BPIALL          0x278   /* D-cache clean and invalidate by set-way */
  82
  83 #ifndef __ASSEMBLY__
  84
  85 enum reboot_mode;
  86
  87 void armv7m_restart(enum reboot_mode mode, const char *cmd);
  88
  89 #endif /* __ASSEMBLY__ */