mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-04 08:17:46 +00:00
efca139892
We now have SBI v0.2 which is more scalable and extendable to handle future needs for RISC-V supervisor interfaces. Introduce a new config and move all SBI v0.1 code under that config. This allows to implement the new replacement SBI extensions cleanly and remove v0.1 extensions easily in future. Currently, the config is enabled by default. Once all M-mode software, with v0.1, is no longer in use, this config option and all relevant code can be easily removed. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2015 Regents of the University of California
|
|
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
|
|
*/
|
|
|
|
#ifndef _ASM_RISCV_SBI_H
|
|
#define _ASM_RISCV_SBI_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#ifdef CONFIG_RISCV_SBI
|
|
enum sbi_ext_id {
|
|
#ifdef CONFIG_RISCV_SBI_V01
|
|
SBI_EXT_0_1_SET_TIMER = 0x0,
|
|
SBI_EXT_0_1_CONSOLE_PUTCHAR = 0x1,
|
|
SBI_EXT_0_1_CONSOLE_GETCHAR = 0x2,
|
|
SBI_EXT_0_1_CLEAR_IPI = 0x3,
|
|
SBI_EXT_0_1_SEND_IPI = 0x4,
|
|
SBI_EXT_0_1_REMOTE_FENCE_I = 0x5,
|
|
SBI_EXT_0_1_REMOTE_SFENCE_VMA = 0x6,
|
|
SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID = 0x7,
|
|
SBI_EXT_0_1_SHUTDOWN = 0x8,
|
|
#endif
|
|
SBI_EXT_BASE = 0x10,
|
|
SBI_EXT_TIME = 0x54494D45,
|
|
SBI_EXT_IPI = 0x735049,
|
|
SBI_EXT_RFENCE = 0x52464E43,
|
|
};
|
|
|
|
enum sbi_ext_base_fid {
|
|
SBI_EXT_BASE_GET_SPEC_VERSION = 0,
|
|
SBI_EXT_BASE_GET_IMP_ID,
|
|
SBI_EXT_BASE_GET_IMP_VERSION,
|
|
SBI_EXT_BASE_PROBE_EXT,
|
|
SBI_EXT_BASE_GET_MVENDORID,
|
|
SBI_EXT_BASE_GET_MARCHID,
|
|
SBI_EXT_BASE_GET_MIMPID,
|
|
};
|
|
|
|
enum sbi_ext_time_fid {
|
|
SBI_EXT_TIME_SET_TIMER = 0,
|
|
};
|
|
|
|
enum sbi_ext_ipi_fid {
|
|
SBI_EXT_IPI_SEND_IPI = 0,
|
|
};
|
|
|
|
enum sbi_ext_rfence_fid {
|
|
SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
|
|
SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
|
|
SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
|
|
SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
|
|
SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
|
|
SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
|
|
SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
|
|
};
|
|
|
|
#define SBI_SPEC_VERSION_DEFAULT 0x1
|
|
#define SBI_SPEC_VERSION_MAJOR_SHIFT 24
|
|
#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
|
|
#define SBI_SPEC_VERSION_MINOR_MASK 0xffffff
|
|
|
|
/* SBI return error codes */
|
|
#define SBI_SUCCESS 0
|
|
#define SBI_ERR_FAILURE -1
|
|
#define SBI_ERR_NOT_SUPPORTED -2
|
|
#define SBI_ERR_INVALID_PARAM -3
|
|
#define SBI_ERR_DENIED -4
|
|
#define SBI_ERR_INVALID_ADDRESS -5
|
|
|
|
extern unsigned long sbi_spec_version;
|
|
struct sbiret {
|
|
long error;
|
|
long value;
|
|
};
|
|
|
|
int sbi_init(void);
|
|
struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
|
|
unsigned long arg1, unsigned long arg2,
|
|
unsigned long arg3, unsigned long arg4,
|
|
unsigned long arg5);
|
|
|
|
void sbi_console_putchar(int ch);
|
|
int sbi_console_getchar(void);
|
|
void sbi_set_timer(uint64_t stime_value);
|
|
void sbi_shutdown(void);
|
|
void sbi_clear_ipi(void);
|
|
void sbi_send_ipi(const unsigned long *hart_mask);
|
|
void sbi_remote_fence_i(const unsigned long *hart_mask);
|
|
void sbi_remote_sfence_vma(const unsigned long *hart_mask,
|
|
unsigned long start,
|
|
unsigned long size);
|
|
|
|
void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
|
|
unsigned long start,
|
|
unsigned long size,
|
|
unsigned long asid);
|
|
int sbi_probe_extension(int ext);
|
|
|
|
/* Check if current SBI specification version is 0.1 or not */
|
|
static inline int sbi_spec_is_0_1(void)
|
|
{
|
|
return (sbi_spec_version == SBI_SPEC_VERSION_DEFAULT) ? 1 : 0;
|
|
}
|
|
|
|
/* Get the major version of SBI */
|
|
static inline unsigned long sbi_major_version(void)
|
|
{
|
|
return (sbi_spec_version >> SBI_SPEC_VERSION_MAJOR_SHIFT) &
|
|
SBI_SPEC_VERSION_MAJOR_MASK;
|
|
}
|
|
|
|
/* Get the minor version of SBI */
|
|
static inline unsigned long sbi_minor_version(void)
|
|
{
|
|
return sbi_spec_version & SBI_SPEC_VERSION_MINOR_MASK;
|
|
}
|
|
#else /* CONFIG_RISCV_SBI */
|
|
/* stubs for code that is only reachable under IS_ENABLED(CONFIG_RISCV_SBI): */
|
|
void sbi_set_timer(uint64_t stime_value);
|
|
void sbi_clear_ipi(void);
|
|
void sbi_send_ipi(const unsigned long *hart_mask);
|
|
void sbi_remote_fence_i(const unsigned long *hart_mask);
|
|
void sbi_init(void);
|
|
#endif /* CONFIG_RISCV_SBI */
|
|
#endif /* _ASM_RISCV_SBI_H */
|