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riscv: Mark existing SBI as v0.1 SBI

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As per the new SBI specification, current SBI implementation version
is defined as 0.1 and will be removed/replaced in future. Each of the
function call in 0.1 is defined as a separate extension which makes
easier to replace them one at a time.

Rename existing implementation to reflect that. This patch is just
a preparatory patch for SBI v0.2 and doesn't introduce any functional
changes.

This commit is inspired from Linux kernel patch:
https://patchwork.kernel.org/patch/11407355/

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Pragnesh Patel <pragnesh.patel@sifive.com>
This commit is contained in:
Bin Meng 2020-03-09 19:35:27 -07:00 • committed by Andes
parent f295e00c61
commit 215c3a7701
1 changed files with 21 additions and 19 deletions
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40
arch/riscv/include/asm/sbi.h
View file

@ -1,6 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2015 Regents of the University of California
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*
* Taken from Linux arch/riscv/include/asm/sbi.h
*/
@ -10,15 +11,15 @@
#include <linux/types.h>
#define SBI_SET_TIMER 0
#define SBI_CONSOLE_PUTCHAR 1
#define SBI_CONSOLE_GETCHAR 2
#define SBI_CLEAR_IPI 3
#define SBI_SEND_IPI 4
#define SBI_REMOTE_FENCE_I 5
#define SBI_REMOTE_SFENCE_VMA 6
#define SBI_REMOTE_SFENCE_VMA_ASID 7
#define SBI_SHUTDOWN 8
#define SBI_EXT_0_1_SET_TIMER 0x0
#define SBI_EXT_0_1_CONSOLE_PUTCHAR 0x1
#define SBI_EXT_0_1_CONSOLE_GETCHAR 0x2
#define SBI_EXT_0_1_CLEAR_IPI 0x3
#define SBI_EXT_0_1_SEND_IPI 0x4
#define SBI_EXT_0_1_REMOTE_FENCE_I 0x5
#define SBI_EXT_0_1_REMOTE_SFENCE_VMA 0x6
#define SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID 0x7
#define SBI_EXT_0_1_SHUTDOWN 0x8
#define SBI_CALL(which, arg0, arg1, arg2, arg3) ({ \
register uintptr_t a0 asm ("a0") = (uintptr_t)(arg0); \
@ -44,48 +45,48 @@
static inline void sbi_console_putchar(int ch)
{
SBI_CALL_1(SBI_CONSOLE_PUTCHAR, ch);
SBI_CALL_1(SBI_EXT_0_1_CONSOLE_PUTCHAR, ch);
}
static inline int sbi_console_getchar(void)
{
return SBI_CALL_0(SBI_CONSOLE_GETCHAR);
return SBI_CALL_0(SBI_EXT_0_1_CONSOLE_GETCHAR);
}
static inline void sbi_set_timer(uint64_t stime_value)
{
#if __riscv_xlen == 32
SBI_CALL_2(SBI_SET_TIMER, stime_value, stime_value >> 32);
SBI_CALL_2(SBI_EXT_0_1_SET_TIMER, stime_value, stime_value >> 32);
#else
SBI_CALL_1(SBI_SET_TIMER, stime_value);
SBI_CALL_1(SBI_EXT_0_1_SET_TIMER, stime_value);
#endif
}
static inline void sbi_shutdown(void)
{
SBI_CALL_0(SBI_SHUTDOWN);
SBI_CALL_0(SBI_EXT_0_1_SHUTDOWN);
}
static inline void sbi_clear_ipi(void)
{
SBI_CALL_0(SBI_CLEAR_IPI);
SBI_CALL_0(SBI_EXT_0_1_CLEAR_IPI);
}
static inline void sbi_send_ipi(const unsigned long *hart_mask)
{
SBI_CALL_1(SBI_SEND_IPI, hart_mask);
SBI_CALL_1(SBI_EXT_0_1_SEND_IPI, hart_mask);
}
static inline void sbi_remote_fence_i(const unsigned long *hart_mask)
{
SBI_CALL_1(SBI_REMOTE_FENCE_I, hart_mask);
SBI_CALL_1(SBI_EXT_0_1_REMOTE_FENCE_I, hart_mask);
}
static inline void sbi_remote_sfence_vma(const unsigned long *hart_mask,
unsigned long start,
unsigned long size)
{
SBI_CALL_3(SBI_REMOTE_SFENCE_VMA, hart_mask, start, size);
SBI_CALL_3(SBI_EXT_0_1_REMOTE_SFENCE_VMA, hart_mask, start, size);
}
static inline void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
@ -93,7 +94,8 @@ static inline void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
unsigned long size,
unsigned long asid)
{
SBI_CALL_4(SBI_REMOTE_SFENCE_VMA_ASID, hart_mask, start, size, asid);
SBI_CALL_4(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID, hart_mask,
start, size, asid);
}
#endif