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/*
* Copyright (c) 2017 Microsemi Corporation.
* Padmarao Begari, Microsemi Corporation <padmarao.begari@microsemi.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef RISCV_CSR_ENCODING_H
#define RISCV_CSR_ENCODING_H
#define MSTATUS_UIE 0x00000001
#define MSTATUS_SIE 0x00000002
#define MSTATUS_HIE 0x00000004
#define MSTATUS_MIE 0x00000008
#define MSTATUS_UPIE 0x00000010
#define MSTATUS_SPIE 0x00000020
#define MSTATUS_HPIE 0x00000040
#define MSTATUS_MPIE 0x00000080
#define MSTATUS_SPP 0x00000100
#define MSTATUS_HPP 0x00000600
#define MSTATUS_MPP 0x00001800
#define MSTATUS_FS 0x00006000
#define MSTATUS_XS 0x00018000
#define MSTATUS_MPRV 0x00020000
#define MSTATUS_PUM 0x00040000
#define MSTATUS_VM 0x1F000000
#define MSTATUS32_SD 0x80000000
#define MSTATUS64_SD 0x8000000000000000
#define MCAUSE32_CAUSE 0x7FFFFFFF
#define MCAUSE64_CAUSE 0x7FFFFFFFFFFFFFFF
#define MCAUSE32_INT 0x80000000
#define MCAUSE64_INT 0x8000000000000000
#define SSTATUS_UIE 0x00000001
#define SSTATUS_SIE 0x00000002
#define SSTATUS_UPIE 0x00000010
#define SSTATUS_SPIE 0x00000020
#define SSTATUS_SPP 0x00000100
#define SSTATUS_FS 0x00006000
#define SSTATUS_XS 0x00018000
#define SSTATUS_PUM 0x00040000
#define SSTATUS32_SD 0x80000000
#define SSTATUS64_SD 0x8000000000000000
#define MIP_SSIP BIT(IRQ_S_SOFT)
#define MIP_HSIP BIT(IRQ_H_SOFT)
#define MIP_MSIP BIT(IRQ_M_SOFT)
#define MIP_STIP BIT(IRQ_S_TIMER)
#define MIP_HTIP BIT(IRQ_H_TIMER)
#define MIP_MTIP BIT(IRQ_M_TIMER)
#define MIP_SEIP BIT(IRQ_S_EXT)
#define MIP_HEIP BIT(IRQ_H_EXT)
#define MIP_MEIP BIT(IRQ_M_EXT)
#define SIP_SSIP MIP_SSIP
#define SIP_STIP MIP_STIP
#define PRV_U 0
#define PRV_S 1
#define PRV_H 2
#define PRV_M 3
#define VM_MBARE 0
#define VM_MBB 1
#define VM_MBBID 2
#define VM_SV32 8
#define VM_SV39 9
#define VM_SV48 10
#define IRQ_S_SOFT 1
#define IRQ_H_SOFT 2
#define IRQ_M_SOFT 3
#define IRQ_S_TIMER 5
#define IRQ_H_TIMER 6
#define IRQ_M_TIMER 7
#define IRQ_S_EXT 9
#define IRQ_H_EXT 10
#define IRQ_M_EXT 11
#define IRQ_COP 12
#define IRQ_HOST 13
#define DEFAULT_RSTVEC 0x00001000
#define DEFAULT_NMIVEC 0x00001004
#define DEFAULT_MTVEC 0x00001010
#define CONFIG_STRING_ADDR 0x0000100C
#define EXT_IO_BASE 0x40000000
#define DRAM_BASE 0x80000000
// page table entry (PTE) fields
#define PTE_V 0x001 // Valid
#define PTE_TYPE 0x01E // Type
#define PTE_R 0x020 // Referenced
#define PTE_D 0x040 // Dirty
#define PTE_SOFT 0x380 // Reserved for Software
#define PTE_TYPE_TABLE 0x00
#define PTE_TYPE_TABLE_GLOBAL 0x02
#define PTE_TYPE_URX_SR 0x04
#define PTE_TYPE_URWX_SRW 0x06
#define PTE_TYPE_UR_SR 0x08
#define PTE_TYPE_URW_SRW 0x0A
#define PTE_TYPE_URX_SRX 0x0C
#define PTE_TYPE_URWX_SRWX0x0E
#define PTE_TYPE_SR 0x10
#define PTE_TYPE_SRW 0x12
#define PTE_TYPE_SRX 0x14
#define PTE_TYPE_SRWX 0x16
#define PTE_TYPE_SR_GLOBAL 0x18
#define PTE_TYPE_SRW_GLOBAL 0x1A
#define PTE_TYPE_SRX_GLOBAL 0x1C
#define PTE_TYPE_SRWX_GLOBAL 0x1E
#define PTE_PPN_SHIFT 10
#define PTE_TABLE(PTE) ((0x0000000AU >> ((PTE) & 0x1F)) & 1)
#define PTE_UR(PTE) ((0x0000AAA0U >> ((PTE) & 0x1F)) & 1)
#define PTE_UW(PTE) ((0x00008880U >> ((PTE) & 0x1F)) & 1)
#define PTE_UX(PTE) ((0x0000A0A0U >> ((PTE) & 0x1F)) & 1)
#define PTE_SR(PTE) ((0xAAAAAAA0U >> ((PTE) & 0x1F)) & 1)
#define PTE_SW(PTE) ((0x88888880U >> ((PTE) & 0x1F)) & 1)
#define PTE_SX(PTE) ((0xA0A0A000U >> ((PTE) & 0x1F)) & 1)
#define PTE_CHECK_PERM(PTE, SUPERVISOR, STORE, FETCH) \
((STORE) ? ((SUPERVISOR) ? PTE_SW(PTE) : PTE_UW(PTE)) : \
(FETCH) ? ((SUPERVISOR) ? PTE_SX(PTE) : PTE_UX(PTE)) : \
((SUPERVISOR) ? PTE_SR(PTE) : PTE_UR(PTE)))
#ifdef __riscv
#ifdef CONFIG_64BIT
# define MSTATUS_SD MSTATUS64_SD
# define SSTATUS_SD SSTATUS64_SD
# define MCAUSE_INT MCAUSE64_INT
# define MCAUSE_CAUSE MCAUSE64_CAUSE
# define RISCV_PGLEVEL_BITS 9
#else
# define MSTATUS_SD MSTATUS32_SD
# define SSTATUS_SD SSTATUS32_SD
# define RISCV_PGLEVEL_BITS 10
# define MCAUSE_INT MCAUSE32_INT
# define MCAUSE_CAUSE MCAUSE32_CAUSE
#endif
#define RISCV_PGSHIFT 12
#define RISCV_PGSIZE BIT(RISCV_PGSHIFT)
#ifndef __ASSEMBLER__
#ifdef __GNUC__
#define read_csr(reg) ({ unsigned long __tmp; \
asm volatile ("csrr %0, " #reg : "=r"(__tmp)); \
__tmp; })
#define write_csr(reg, val) ({ \
if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \
asm volatile ("csrw " #reg ", %0" :: "i"(val)); \
else \
asm volatile ("csrw " #reg ", %0" :: "r"(val)); })
#define swap_csr(reg, val) ({ unsigned long __tmp; \
if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \
asm volatile ("csrrw %0, " #reg ", %1" : "=r"(__tmp) : "i"(val)); \
else \
asm volatile ("csrrw %0, " #reg ", %1" : "=r"(__tmp) : "r"(val)); \
__tmp; })
#define set_csr(reg, bit) ({ unsigned long __tmp; \
if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \
asm volatile ("csrrs %0, " #reg ", %1" : "=r"(__tmp) : "i"(bit)); \
else \
asm volatile ("csrrs %0, " #reg ", %1" : "=r"(__tmp) : "r"(bit)); \
__tmp; })
#define clear_csr(reg, bit) ({ unsigned long __tmp; \
if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \
asm volatile ("csrrc %0, " #reg ", %1" : "=r"(__tmp) : "i"(bit)); \
else \
asm volatile ("csrrc %0, " #reg ", %1" : "=r"(__tmp) : "r"(bit)); \
__tmp; })
#define rdtime() read_csr(time)
#define rdcycle() read_csr(cycle)
#define rdinstret() read_csr(instret)
#endif
#endif
#endif
#endif
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