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/* SPDX-License-Identifier: GPL-2.0 */
/*
 * cpu.h: Values of the PRID register used to match up
 *   various LoongArch CPU types.
 *
 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
 */
#ifndef _ASM_CPU_H
#define _ASM_CPU_H

/*
 * As described in LoongArch specs from Loongson Technology, the PRID register
 * (CPUCFG.00) has the following layout:
 *
 * +---------------+----------------+------------+--------------------+
 * | Reserved      | Company ID     | Series ID  |  Product ID        |
 * +---------------+----------------+------------+--------------------+
 *  31   24 23    16 15        12 11       0
 */

/*
 * Assigned Company values for bits 23:16 of the PRID register.
 */

#define PRID_COMP_MASK  0xff0000

#define PRID_COMP_LOONGSON 0x140000

/*
 * Assigned Series ID values for bits 15:12 of the PRID register. In order
 * to detect a certain CPU type exactly eventually additional registers may
 * need to be examined.
 */

#define PRID_SERIES_MASK 0xf000

#define PRID_SERIES_LA132 0x8000  /* Loongson 32bit */
#define PRID_SERIES_LA264 0xa000  /* Loongson 64bit, 2-issue */
#define PRID_SERIES_LA364 0xb000  /* Loongson 64bit, 3-issue */
#define PRID_SERIES_LA464 0xc000  /* Loongson 64bit, 4-issue */
#define PRID_SERIES_LA664 0xd000  /* Loongson 64bit, 6-issue */

/*
 * Particular Product ID values for bits 11:0 of the PRID register.
 */

#define PRID_PRODUCT_MASK 0x0fff

#if !defined(__ASSEMBLER__)

enum cpu_type_enum {
 CPU_UNKNOWN,
 CPU_LOONGSON32,
 CPU_LOONGSON64,
 CPU_LAST
};

#endif /* !__ASSEMBLER__ */

/*
 * ISA Level encodings
 *
 */

#define LOONGARCH_CPU_ISA_LA32R 0x00000001
#define LOONGARCH_CPU_ISA_LA32S 0x00000002
#define LOONGARCH_CPU_ISA_LA64  0x00000004

#define LOONGARCH_CPU_ISA_32BIT (LOONGARCH_CPU_ISA_LA32R | LOONGARCH_CPU_ISA_LA32S)
#define LOONGARCH_CPU_ISA_64BIT LOONGARCH_CPU_ISA_LA64

/*
 * CPU Option encodings
 */
#define CPU_FEATURE_CPUCFG  0 /* CPU has CPUCFG */
#define CPU_FEATURE_LAM   1 /* CPU has Atomic instructions */
#define CPU_FEATURE_UAL   2 /* CPU supports unaligned access */
#define CPU_FEATURE_FPU   3 /* CPU has FPU */
#define CPU_FEATURE_LSX   4 /* CPU has LSX (128-bit SIMD) */
#define CPU_FEATURE_LASX  5 /* CPU has LASX (256-bit SIMD) */
#define CPU_FEATURE_CRC32  6 /* CPU has CRC32 instructions */
#define CPU_FEATURE_COMPLEX  7 /* CPU has Complex instructions */
#define CPU_FEATURE_CRYPTO  8 /* CPU has Crypto instructions */
#define CPU_FEATURE_LVZ   9 /* CPU has Virtualization extension */
#define CPU_FEATURE_LBT_X86  10 /* CPU has X86 Binary Translation */
#define CPU_FEATURE_LBT_ARM  11 /* CPU has ARM Binary Translation */
#define CPU_FEATURE_LBT_MIPS  12 /* CPU has MIPS Binary Translation */
#define CPU_FEATURE_TLB   13 /* CPU has TLB */
#define CPU_FEATURE_CSR   14 /* CPU has CSR */
#define CPU_FEATURE_IOCSR  15 /* CPU has IOCSR */
#define CPU_FEATURE_WATCH  16 /* CPU has watchpoint registers */
#define CPU_FEATURE_VINT  17 /* CPU has vectored interrupts */
#define CPU_FEATURE_CSRIPI  18 /* CPU has CSR-IPI */
#define CPU_FEATURE_EXTIOI  19 /* CPU has EXT-IOI */
#define CPU_FEATURE_PREFETCH  20 /* CPU has prefetch instructions */
#define CPU_FEATURE_PMP   21 /* CPU has perfermance counter */
#define CPU_FEATURE_SCALEFREQ  22 /* CPU supports cpufreq scaling */
#define CPU_FEATURE_FLATMODE  23 /* CPU has flat mode */
#define CPU_FEATURE_EIODECODE  24 /* CPU has EXTIOI interrupt pin decode mode */
#define CPU_FEATURE_GUESTID  25 /* CPU has GuestID feature */
#define CPU_FEATURE_HYPERVISOR  26 /* CPU has hypervisor (running in VM) */
#define CPU_FEATURE_PTW   27 /* CPU has hardware page table walker */
#define CPU_FEATURE_LSPW  28 /* CPU has LSPW (lddir/ldpte instructions) */
#define CPU_FEATURE_AVECINT  29 /* CPU has AVEC interrupt */

#define LOONGARCH_CPU_CPUCFG  BIT_ULL(CPU_FEATURE_CPUCFG)
#define LOONGARCH_CPU_LAM  BIT_ULL(CPU_FEATURE_LAM)
#define LOONGARCH_CPU_UAL  BIT_ULL(CPU_FEATURE_UAL)
#define LOONGARCH_CPU_FPU  BIT_ULL(CPU_FEATURE_FPU)
#define LOONGARCH_CPU_LSX  BIT_ULL(CPU_FEATURE_LSX)
#define LOONGARCH_CPU_LASX  BIT_ULL(CPU_FEATURE_LASX)
#define LOONGARCH_CPU_CRC32  BIT_ULL(CPU_FEATURE_CRC32)
#define LOONGARCH_CPU_COMPLEX  BIT_ULL(CPU_FEATURE_COMPLEX)
#define LOONGARCH_CPU_CRYPTO  BIT_ULL(CPU_FEATURE_CRYPTO)
#define LOONGARCH_CPU_LVZ  BIT_ULL(CPU_FEATURE_LVZ)
#define LOONGARCH_CPU_LBT_X86  BIT_ULL(CPU_FEATURE_LBT_X86)
#define LOONGARCH_CPU_LBT_ARM  BIT_ULL(CPU_FEATURE_LBT_ARM)
#define LOONGARCH_CPU_LBT_MIPS  BIT_ULL(CPU_FEATURE_LBT_MIPS)
#define LOONGARCH_CPU_TLB  BIT_ULL(CPU_FEATURE_TLB)
#define LOONGARCH_CPU_IOCSR  BIT_ULL(CPU_FEATURE_IOCSR)
#define LOONGARCH_CPU_CSR  BIT_ULL(CPU_FEATURE_CSR)
#define LOONGARCH_CPU_WATCH  BIT_ULL(CPU_FEATURE_WATCH)
#define LOONGARCH_CPU_VINT  BIT_ULL(CPU_FEATURE_VINT)
#define LOONGARCH_CPU_CSRIPI  BIT_ULL(CPU_FEATURE_CSRIPI)
#define LOONGARCH_CPU_EXTIOI  BIT_ULL(CPU_FEATURE_EXTIOI)
#define LOONGARCH_CPU_PREFETCH  BIT_ULL(CPU_FEATURE_PREFETCH)
#define LOONGARCH_CPU_PMP  BIT_ULL(CPU_FEATURE_PMP)
#define LOONGARCH_CPU_SCALEFREQ  BIT_ULL(CPU_FEATURE_SCALEFREQ)
#define LOONGARCH_CPU_FLATMODE  BIT_ULL(CPU_FEATURE_FLATMODE)
#define LOONGARCH_CPU_EIODECODE  BIT_ULL(CPU_FEATURE_EIODECODE)
#define LOONGARCH_CPU_GUESTID  BIT_ULL(CPU_FEATURE_GUESTID)
#define LOONGARCH_CPU_HYPERVISOR BIT_ULL(CPU_FEATURE_HYPERVISOR)
#define LOONGARCH_CPU_PTW  BIT_ULL(CPU_FEATURE_PTW)
#define LOONGARCH_CPU_LSPW  BIT_ULL(CPU_FEATURE_LSPW)
#define LOONGARCH_CPU_AVECINT  BIT_ULL(CPU_FEATURE_AVECINT)

#endif /* _ASM_CPU_H */