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platform: Allow platforms to specify the size of tlb fifo

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For some platforms with a particularly high number of harts, if the
tlb fifo is too small, it case harts to wait. Platforms should be
allowed to specify the size of the tlb fifo.

Signed-off-by: Xiang W <wxjstz@126.com>
Signed-off-by: Xing Xiaoguang <xiaoguang.xing@sophgo.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Xiang W
2023-09-06 21:10:03 +08:00
committed by Anup Patel
parent 901d3d7bff
commit cacfba32cc
5 changed files with 29 additions and 4 deletions
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18
include/sbi/sbi_platform.h
View File

@@ -41,6 +41,7 @@
#define SBI_PLATFORM_HART_INDEX2ID_OFFSET (0x60 + (__SIZEOF_POINTER__ * 2))
#define SBI_PLATFORM_TLB_RANGE_FLUSH_LIMIT_DEFAULT (1UL << 12)
#define SBI_PLATFORM_TLB_FIFO_NUM_ENTRIES 8
#ifndef __ASSEMBLER__
@@ -125,6 +126,9 @@ struct sbi_platform_operations {
/** Get tlb flush limit value **/
u64 (*get_tlbr_flush_limit)(void);
/** Get tlb fifo num entries*/
u32 (*get_tlb_num_entries)(void);
/** Initialize platform timer for current HART */
int (*timer_init)(bool cold_boot);
/** Exit platform timer for current HART */
@@ -325,6 +329,20 @@ static inline u64 sbi_platform_tlbr_flush_limit(const struct sbi_platform *plat)
return SBI_PLATFORM_TLB_RANGE_FLUSH_LIMIT_DEFAULT;
}
/**
* Get platform specific tlb fifo num entries.
*
* @param plat pointer to struct sbi_platform
*
* @return number of tlb fifo entries
*/
static inline u32 sbi_platform_tlb_fifo_num_entries(const struct sbi_platform *plat)
{
if (plat && sbi_platform_ops(plat)->get_tlb_num_entries)
return sbi_platform_ops(plat)->get_tlb_num_entries();
return SBI_PLATFORM_TLB_FIFO_NUM_ENTRIES;
}
/**
* Get total number of HARTs supported by the platform
*

2
include/sbi/sbi_tlb.h
View File

@@ -20,8 +20,6 @@
/* clang-format on */
#define SBI_TLB_FIFO_NUM_ENTRIES 8
struct sbi_scratch;
struct sbi_tlb_info {