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lib: Factor-out SBI legacy extension

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This patch factor-out SBI legacy extension into its own source
for better modularity of SBI implementation.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-01-17 18:09:49 +05:30
committed by Anup Patel
parent 37923c4a66
commit 766850222a
4 changed files with 123 additions and 102 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/sbi/sbi_ecall.h
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@@ -29,6 +29,8 @@ struct sbi_ecall_extension {
struct sbi_trap_info *out_trap);
};
extern struct sbi_ecall_extension ecall_legacy;
u16 sbi_ecall_version_major(void);
u16 sbi_ecall_version_minor(void);

1
lib/sbi/objects.mk
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@@ -14,6 +14,7 @@ libsbi-objs-y += riscv_locks.o
libsbi-objs-y += sbi_console.o
libsbi-objs-y += sbi_ecall.o
libsbi-objs-y += sbi_ecall_legacy.o
libsbi-objs-y += sbi_emulate_csr.o
libsbi-objs-y += sbi_fifo.o
libsbi-objs-y += sbi_hfence.o

103
lib/sbi/sbi_ecall.c
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@@ -7,20 +7,16 @@
* Anup Patel <anup.patel@wdc.com>
*/
#include <sbi/sbi_console.h>
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_timer.h>
#include <sbi/sbi_tlb.h>
#include <sbi/sbi_trap.h>
#include <sbi/sbi_unpriv.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_version.h>
#include <sbi/riscv_asm.h>
#define SBI_ECALL_VERSION_MAJOR 0
#define SBI_ECALL_VERSION_MINOR 2
@@ -36,22 +32,6 @@ u16 sbi_ecall_version_minor(void)
return SBI_ECALL_VERSION_MINOR;
}
static int sbi_load_hart_mask_unpriv(struct sbi_scratch *scratch, ulong *pmask,
ulong *hmask, struct sbi_trap_info *uptrap)
{
ulong mask = 0;
if (pmask) {
mask = sbi_load_ulong(pmask, scratch, uptrap);
if (uptrap->cause)
return SBI_ETRAP;
} else {
mask = sbi_hart_available_mask();
}
*hmask = mask;
return 0;
}
static int sbi_ecall_base_probe(struct sbi_scratch *scratch,
unsigned long extid,
unsigned long *out_val)
@@ -245,87 +225,6 @@ static struct sbi_ecall_extension ecall_rfence = {
.handle = sbi_ecall_rfence_handler,
};
static int sbi_ecall_0_1_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
int ret = 0;
struct sbi_tlb_info tlb_info;
u32 source_hart = sbi_current_hartid();
ulong hmask = 0;
switch (extid) {
case SBI_EXT_0_1_SET_TIMER:
#if __riscv_xlen == 32
sbi_timer_event_start(scratch,
(((u64)args[1] << 32) | (u64)args[0]));
#else
sbi_timer_event_start(scratch, (u64)args[0]);
#endif
break;
case SBI_EXT_0_1_CONSOLE_PUTCHAR:
sbi_putc(args[0]);
break;
case SBI_EXT_0_1_CONSOLE_GETCHAR:
ret = sbi_getc();
break;
case SBI_EXT_0_1_CLEAR_IPI:
sbi_ipi_clear_smode(scratch);
break;
case SBI_EXT_0_1_SEND_IPI:
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_ipi_send_smode(scratch, hmask, 0);
break;
case SBI_EXT_0_1_REMOTE_FENCE_I:
tlb_info.start = 0;
tlb_info.size = 0;
tlb_info.type = SBI_ITLB_FLUSH;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
break;
case SBI_EXT_0_1_REMOTE_SFENCE_VMA:
tlb_info.start = (unsigned long)args[1];
tlb_info.size = (unsigned long)args[2];
tlb_info.type = SBI_TLB_FLUSH_VMA;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
break;
case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID:
tlb_info.start = (unsigned long)args[1];
tlb_info.size = (unsigned long)args[2];
tlb_info.asid = (unsigned long)args[3];
tlb_info.type = SBI_TLB_FLUSH_VMA_ASID;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
break;
case SBI_EXT_0_1_SHUTDOWN:
sbi_system_shutdown(scratch, 0);
break;
default:
ret = SBI_ENOTSUPP;
};
return ret;
}
static struct sbi_ecall_extension ecall_0_1 = {
.extid_start = SBI_EXT_0_1_SET_TIMER,
.extid_end = SBI_EXT_0_1_SHUTDOWN,
.handle = sbi_ecall_0_1_handler,
};
static int sbi_ecall_vendor_probe(struct sbi_scratch *scratch,
unsigned long extid,
unsigned long *out_val)
@@ -468,7 +367,7 @@ int sbi_ecall_init(void)
ret = sbi_ecall_register_extension(&ecall_base);
if (ret)
return ret;
ret = sbi_ecall_register_extension(&ecall_0_1);
ret = sbi_ecall_register_extension(&ecall_legacy);
if (ret)
return ret;
ret = sbi_ecall_register_extension(&ecall_vendor);

119
lib/sbi/sbi_ecall_legacy.c Normal file
View File

@@ -0,0 +1,119 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
* Atish Patra <atish.patra@wdc.com>
*/
#include <sbi/sbi_console.h>
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_timer.h>
#include <sbi/sbi_tlb.h>
#include <sbi/sbi_trap.h>
#include <sbi/sbi_unpriv.h>
#include <sbi/sbi_hart.h>
static int sbi_load_hart_mask_unpriv(struct sbi_scratch *scratch,
ulong *pmask, ulong *hmask,
struct sbi_trap_info *uptrap)
{
ulong mask = 0;
if (pmask) {
mask = sbi_load_ulong(pmask, scratch, uptrap);
if (uptrap->cause)
return SBI_ETRAP;
} else {
mask = sbi_hart_available_mask();
}
*hmask = mask;
return 0;
}
static int sbi_ecall_legacy_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
int ret = 0;
struct sbi_tlb_info tlb_info;
u32 source_hart = sbi_current_hartid();
ulong hmask = 0;
switch (extid) {
case SBI_EXT_0_1_SET_TIMER:
#if __riscv_xlen == 32
sbi_timer_event_start(scratch,
(((u64)args[1] << 32) | (u64)args[0]));
#else
sbi_timer_event_start(scratch, (u64)args[0]);
#endif
break;
case SBI_EXT_0_1_CONSOLE_PUTCHAR:
sbi_putc(args[0]);
break;
case SBI_EXT_0_1_CONSOLE_GETCHAR:
ret = sbi_getc();
break;
case SBI_EXT_0_1_CLEAR_IPI:
sbi_ipi_clear_smode(scratch);
break;
case SBI_EXT_0_1_SEND_IPI:
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_ipi_send_smode(scratch, hmask, 0);
break;
case SBI_EXT_0_1_REMOTE_FENCE_I:
tlb_info.start = 0;
tlb_info.size = 0;
tlb_info.type = SBI_ITLB_FLUSH;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
break;
case SBI_EXT_0_1_REMOTE_SFENCE_VMA:
tlb_info.start = (unsigned long)args[1];
tlb_info.size = (unsigned long)args[2];
tlb_info.type = SBI_TLB_FLUSH_VMA;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
break;
case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID:
tlb_info.start = (unsigned long)args[1];
tlb_info.size = (unsigned long)args[2];
tlb_info.asid = (unsigned long)args[3];
tlb_info.type = SBI_TLB_FLUSH_VMA_ASID;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_load_hart_mask_unpriv(scratch, (ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
break;
case SBI_EXT_0_1_SHUTDOWN:
sbi_system_shutdown(scratch, 0);
break;
default:
ret = SBI_ENOTSUPP;
};
return ret;
}
struct sbi_ecall_extension ecall_legacy = {
.extid_start = SBI_EXT_0_1_SET_TIMER,
.extid_end = SBI_EXT_0_1_SHUTDOWN,
.handle = sbi_ecall_legacy_handler,
};