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#include <sys/types.h>
#ifndef _SEMIHOSTING_H_
#define _SEMIHOSTING_H_
// ----------------------------------------------------------------------------
// Semihosting operations.
enum Semihost_Sys_Op {
// Regular operations
SEMIHOST_SYS_CLOCK = 0x10,
SEMIHOST_SYS_CLOSE = 0x02,
SEMIHOST_SYS_ELAPSED = 0x30,
SEMIHOST_SYS_ERRNO = 0x13,
SEMIHOST_SYS_EXIT = 0x18,
SEMIHOST_SYS_EXIT_EXTENDED = 0x20,
SEMIHOST_SYS_FLEN = 0x0C,
SEMIHOST_SYS_GET_CMDLINE = 0x15,
SEMIHOST_SYS_HEAPINFO = 0x16,
SEMIHOST_SYS_ISERROR = 0x08,
SEMIHOST_SYS_ISTTY = 0x09,
SEMIHOST_SYS_OPEN = 0x01,
SEMIHOST_SYS_READ = 0x06,
SEMIHOST_SYS_READC = 0x07,
SEMIHOST_SYS_REMOVE = 0x0E,
SEMIHOST_SYS_RENAME = 0x0F,
SEMIHOST_SYS_SEEK = 0x0A,
SEMIHOST_SYS_SYSTEM = 0x12,
SEMIHOST_SYS_TICKFREQ = 0x31,
SEMIHOST_SYS_TIME = 0x11,
SEMIHOST_SYS_TMPNAM = 0x0D,
SEMIHOST_SYS_WRITE = 0x05,
SEMIHOST_SYS_WRITEC = 0x03,
SEMIHOST_SYS_WRITE0 = 0x04,
};
enum ADP_Code {
ADP_Stopped_BranchThroughZero = 0x20000,
ADP_Stopped_UndefinedInstr = 0x20001,
ADP_Stopped_SoftwareInterrupt = 0x20002,
ADP_Stopped_PrefetchAbort = 0x20003,
ADP_Stopped_DataAbort = 0x20004,
ADP_Stopped_AddressException = 0x20005,
ADP_Stopped_IRQ = 0x20006,
ADP_Stopped_FIQ = 0x20007,
ADP_Stopped_BreakPoint = 0x20020,
ADP_Stopped_WatchPoint = 0x20021,
ADP_Stopped_StepComplete = 0x20022,
ADP_Stopped_RunTimeErrorUnknown = 0x20023,
ADP_Stopped_InternalError = 0x20024,
ADP_Stopped_UserInterruption = 0x20025,
ADP_Stopped_ApplicationExit = 0x20026,
ADP_Stopped_StackOverflow = 0x20027,
ADP_Stopped_DivisionByZero = 0x20028,
ADP_Stopped_OSSpecific = 0x20029,
};
typedef struct {
uintptr_t param1;
uintptr_t param2;
uintptr_t param3;
} semihostparam_t;
static inline uintptr_t __attribute__((always_inline))
semihost_call_host(uintptr_t op, uintptr_t arg) {
register uintptr_t r0 asm("a0") = op;
register uintptr_t r1 asm("a1") = arg;
asm volatile(".option push \n"
".option norvc \n"
" slli zero,zero,0x1f \n"
" ebreak \n"
" srai zero,zero,0x7 \n"
".option pop \n"
: "=r"(r0) /* Outputs */
: "r"(r0), "r"(r1) /* Inputs */
: "memory");
return r0;
}
#endif
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