spr.h

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#ifndef CPU_PPC64_SPR_H
#define CPU_PPC64_SPR_H
 
#include <arch/byteorder.h>     // PPC_BIT()
 
#define SPR_TB                                  0x10C
 
#define SPR_PVR                                 0x11F
#define SPR_PVR_REV_MASK                        (PPC_BITMASK(52, 55) | PPC_BITMASK(60, 63))
#define SPR_PVR_REV(maj, min)                   (PPC_SHIFT((maj), 55) | PPC_SHIFT((min), 63))
 
#define SPR_HSPRG0                              0x130
#define SPR_HSPRG1                              0x131
 
#define SPR_HRMOR                               0x139
 
#define SPR_HMER                                0x150
/* Bits in HMER/HMEER */
#define SPR_HMER_MALFUNCTION_ALERT              PPC_BIT(0)
#define SPR_HMER_PROC_RECV_DONE                 PPC_BIT(2)
#define SPR_HMER_PROC_RECV_ERROR_MASKED         PPC_BIT(3)
#define SPR_HMER_TFAC_ERROR                     PPC_BIT(4)
#define SPR_HMER_TFMR_PARITY_ERROR              PPC_BIT(5)
#define SPR_HMER_XSCOM_FAIL                     PPC_BIT(8)
#define SPR_HMER_XSCOM_DONE                     PPC_BIT(9)
#define SPR_HMER_PROC_RECV_AGAIN                PPC_BIT(11)
#define SPR_HMER_WARN_RISE                      PPC_BIT(14)
#define SPR_HMER_WARN_FALL                      PPC_BIT(15)
#define SPR_HMER_SCOM_FIR_HMI                   PPC_BIT(16)
#define SPR_HMER_TRIG_FIR_HMI                   PPC_BIT(17)
#define SPR_HMER_HYP_RESOURCE_ERR               PPC_BIT(20)
#define SPR_HMER_XSCOM_STATUS                   PPC_BITMASK(21, 23)
#define SPR_HMER_XSCOM_OCCUPIED                 PPC_BIT(23)
 
#ifndef __ASSEMBLER__
#include <types.h>
 
static inline uint64_t read_spr(int spr)
{
        uint64_t val;
        asm volatile("mfspr %0,%1" : "=r"(val) : "i"(spr) : "memory");
        return val;
}
 
static inline void write_spr(int spr, uint64_t val)
{
        asm volatile("mtspr %0, %1" :: "i"(spr), "r"(val) : "memory");
}
 
static inline uint64_t read_hmer(void)
{
        return read_spr(SPR_HMER);
}
 
static inline void clear_hmer(void)
{
        write_spr(SPR_HMER, 0);
}
 
static inline uint64_t read_msr(void)
{
        uint64_t val;
        asm volatile("mfmsr %0" : "=r"(val) :: "memory");
        return val;
}
 
static inline uint64_t pvr_revision(void)
{
        return read_spr(SPR_PVR) & SPR_PVR_REV_MASK;
}
 
#endif /* __ASSEMBLER__ */
#endif /* CPU_PPC64_SPR_H */