kernel/arch/arm/include/asm/v7m.h

   1 /*
   2  * Common defines for v7m cpus
   3  */
   4 #define V7M_SCS_ICTR                    IOMEM(0xe000e004)
   5 #define V7M_SCS_ICTR_INTLINESNUM_MASK           0x0000000f
   6
   7 #define BASEADDR_V7M_SCB                IOMEM(0xe000ed00)
   8
   9 #define V7M_SCB_CPUID                   0x00
  10
  11 #define V7M_SCB_ICSR                    0x04
  12 #define V7M_SCB_ICSR_PENDSVSET                  (1 << 28)
  13 #define V7M_SCB_ICSR_PENDSVCLR                  (1 << 27)
  14 #define V7M_SCB_ICSR_RETTOBASE                  (1 << 11)
  15
  16 #define V7M_SCB_VTOR                    0x08
  17
  18 #define V7M_SCB_AIRCR                   0x0c
  19 #define V7M_SCB_AIRCR_VECTKEY                   (0x05fa << 16)
  20 #define V7M_SCB_AIRCR_SYSRESETREQ               (1 << 2)
  21
  22 #define V7M_SCB_SCR                     0x10
  23 #define V7M_SCB_SCR_SLEEPDEEP                   (1 << 2)
  24
  25 #define V7M_SCB_CCR                     0x14
  26 #define V7M_SCB_CCR_STKALIGN                    (1 << 9)
  27
  28 #define V7M_SCB_SHPR2                   0x1c
  29 #define V7M_SCB_SHPR3                   0x20
  30
  31 #define V7M_SCB_SHCSR                   0x24
  32 #define V7M_SCB_SHCSR_USGFAULTENA               (1 << 18)
  33 #define V7M_SCB_SHCSR_BUSFAULTENA               (1 << 17)
  34 #define V7M_SCB_SHCSR_MEMFAULTENA               (1 << 16)
  35
  36 #define V7M_xPSR_FRAMEPTRALIGN                  0x00000200
  37 #define V7M_xPSR_EXCEPTIONNO                    0x000001ff
  38
  39 /*
  40  * When branching to an address that has bits [31:28] == 0xf an exception return
  41  * occurs. Bits [27:5] are reserved (SBOP). If the processor implements the FP
  42  * extension Bit [4] defines if the exception frame has space allocated for FP
  43  * state information, SBOP otherwise. Bit [3] defines the mode that is returned
  44  * to (0 -> handler mode; 1 -> thread mode). Bit [2] defines which sp is used
  45  * (0 -> msp; 1 -> psp). Bits [1:0] are fixed to 0b01.
  46  */
  47 #define EXC_RET_STACK_MASK                      0x00000004
  48 #define EXC_RET_THREADMODE_PROCESSSTACK         0xfffffffd
  49
  50 #ifndef __ASSEMBLY__
  51
  52 enum reboot_mode;
  53
  54 void armv7m_restart(enum reboot_mode mode, const char *cmd);
  55
  56 #endif /* __ASSEMBLY__ */