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lib: Factor-out SBI base extension

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This patch factor-out SBI base 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 19:25:24 +05:30 • committed by Anup Patel
parent 43ac621ecb
commit 021b9e7c76
4 changed files with 86 additions and 71 deletions
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5
include/sbi/sbi_ecall.h
View file

@ -13,6 +13,10 @@
#include <sbi/sbi_types.h>
#include <sbi/sbi_list.h>
#define SBI_ECALL_VERSION_MAJOR 0
#define SBI_ECALL_VERSION_MINOR 2
#define SBI_OPENSBI_IMPID 1
struct sbi_trap_regs;
struct sbi_trap_info;
struct sbi_scratch;
@ -29,6 +33,7 @@ struct sbi_ecall_extension {
struct sbi_trap_info *out_trap);
};
extern struct sbi_ecall_extension ecall_base;
extern struct sbi_ecall_extension ecall_legacy;
extern struct sbi_ecall_extension ecall_time;
extern struct sbi_ecall_extension ecall_rfence;

1
lib/sbi/objects.mk
View file

@ -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_base.o
libsbi-objs-y += sbi_ecall_legacy.o
libsbi-objs-y += sbi_ecall_replace.o
libsbi-objs-y += sbi_ecall_vendor.o

71
lib/sbi/sbi_ecall.c
View file

@ -11,12 +11,6 @@
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_trap.h>
#include <sbi/sbi_version.h>
#include <sbi/riscv_asm.h>
#define SBI_ECALL_VERSION_MAJOR 0
#define SBI_ECALL_VERSION_MINOR 2
#define SBI_OPENSBI_IMPID 1
u16 sbi_ecall_version_major(void)
{
@ -28,71 +22,6 @@ u16 sbi_ecall_version_minor(void)
return SBI_ECALL_VERSION_MINOR;
}
static int sbi_ecall_base_probe(struct sbi_scratch *scratch,
unsigned long extid,
unsigned long *out_val)
{
struct sbi_ecall_extension *ext;
ext = sbi_ecall_find_extension(extid);
if (!ext) {
*out_val = 0;
return 0;
}
if (ext->probe)
return ext->probe(scratch, extid, out_val);
*out_val = 1;
return 0;
}
static int sbi_ecall_base_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;
switch (funcid) {
case SBI_EXT_BASE_GET_SPEC_VERSION:
*out_val = (SBI_ECALL_VERSION_MAJOR <<
SBI_SPEC_VERSION_MAJOR_OFFSET) &
(SBI_SPEC_VERSION_MAJOR_MASK <<
SBI_SPEC_VERSION_MAJOR_OFFSET);
*out_val = *out_val | SBI_ECALL_VERSION_MINOR;
break;
case SBI_EXT_BASE_GET_IMP_ID:
*out_val = SBI_OPENSBI_IMPID;
break;
case SBI_EXT_BASE_GET_IMP_VERSION:
*out_val = OPENSBI_VERSION;
break;
case SBI_EXT_BASE_GET_MVENDORID:
*out_val = csr_read(CSR_MVENDORID);
break;
case SBI_EXT_BASE_GET_MARCHID:
*out_val = csr_read(CSR_MARCHID);
break;
case SBI_EXT_BASE_GET_MIMPID:
*out_val = csr_read(CSR_MIMPID);
break;
case SBI_EXT_BASE_PROBE_EXT:
ret = sbi_ecall_base_probe(scratch, args[0], out_val);
break;
default:
ret = SBI_ENOTSUPP;
}
return ret;
}
static struct sbi_ecall_extension ecall_base = {
.extid_start = SBI_EXT_BASE,
.extid_end = SBI_EXT_BASE,
.handle = sbi_ecall_base_handler,
};
static SBI_LIST_HEAD(ecall_exts_list);
struct sbi_ecall_extension *sbi_ecall_find_extension(unsigned long extid)

80
lib/sbi/sbi_ecall_base.c Normal file
View file

@ -0,0 +1,80 @@
/*
* 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_ecall.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_version.h>
#include <sbi/riscv_asm.h>
static int sbi_ecall_base_probe(struct sbi_scratch *scratch,
unsigned long extid,
unsigned long *out_val)
{
struct sbi_ecall_extension *ext;
ext = sbi_ecall_find_extension(extid);
if (!ext) {
*out_val = 0;
return 0;
}
if (ext->probe)
return ext->probe(scratch, extid, out_val);
*out_val = 1;
return 0;
}
static int sbi_ecall_base_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;
switch (funcid) {
case SBI_EXT_BASE_GET_SPEC_VERSION:
*out_val = (SBI_ECALL_VERSION_MAJOR <<
SBI_SPEC_VERSION_MAJOR_OFFSET) &
(SBI_SPEC_VERSION_MAJOR_MASK <<
SBI_SPEC_VERSION_MAJOR_OFFSET);
*out_val = *out_val | SBI_ECALL_VERSION_MINOR;
break;
case SBI_EXT_BASE_GET_IMP_ID:
*out_val = SBI_OPENSBI_IMPID;
break;
case SBI_EXT_BASE_GET_IMP_VERSION:
*out_val = OPENSBI_VERSION;
break;
case SBI_EXT_BASE_GET_MVENDORID:
*out_val = csr_read(CSR_MVENDORID);
break;
case SBI_EXT_BASE_GET_MARCHID:
*out_val = csr_read(CSR_MARCHID);
break;
case SBI_EXT_BASE_GET_MIMPID:
*out_val = csr_read(CSR_MIMPID);
break;
case SBI_EXT_BASE_PROBE_EXT:
ret = sbi_ecall_base_probe(scratch, args[0], out_val);
break;
default:
ret = SBI_ENOTSUPP;
}
return ret;
}
struct sbi_ecall_extension ecall_base = {
.extid_start = SBI_EXT_BASE,
.extid_end = SBI_EXT_BASE,
.handle = sbi_ecall_base_handler,
};