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lib: sbi: Implement SBI MPXY extension

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Implement the SBI MPXY extension which provides an SBI interface to
the supervisor software for send messages via MPXY framework.

Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com>
Co-developed-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
This commit is contained in:
Anup Patel
2024-08-08 11:04:55 +05:30
committed by Anup Patel
parent 7939bf1329
commit e67d91cdcc
4 changed files with 84 additions and 0 deletions
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10
include/sbi/sbi_ecall_interface.h
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@@ -37,6 +37,7 @@
#define SBI_EXT_DBTR 0x44425452 #define SBI_EXT_DBTR 0x44425452
#define SBI_EXT_SSE 0x535345 #define SBI_EXT_SSE 0x535345
#define SBI_EXT_FWFT 0x46574654 #define SBI_EXT_FWFT 0x46574654
#define SBI_EXT_MPXY 0x4D505859
/* SBI function IDs for BASE extension*/ /* SBI function IDs for BASE extension*/
#define SBI_EXT_BASE_GET_SPEC_VERSION 0x0 #define SBI_EXT_BASE_GET_SPEC_VERSION 0x0
@@ -421,6 +422,15 @@ enum sbi_sse_state {
#define SBI_SSE_EVENT_GLOBAL_BIT (1 << 15) #define SBI_SSE_EVENT_GLOBAL_BIT (1 << 15)
#define SBI_SSE_EVENT_PLATFORM_BIT (1 << 14) #define SBI_SSE_EVENT_PLATFORM_BIT (1 << 14)
/* SBI function IDs for MPXY extension */
#define SBI_EXT_MPXY_SET_SHMEM 0x0
#define SBI_EXT_MPXY_GET_CHANNEL_IDS 0x1
#define SBI_EXT_MPXY_READ_ATTRS 0x2
#define SBI_EXT_MPXY_WRITE_ATTRS 0x3
#define SBI_EXT_MPXY_SEND_MSG_WITH_RESP 0x4
#define SBI_EXT_MPXY_SEND_MSG_NO_RESP 0x5
#define SBI_EXT_MPXY_GET_NOTIFICATION_EVENTS 0x6
/* SBI base specification related macros */ /* SBI base specification related macros */
#define SBI_SPEC_VERSION_MAJOR_OFFSET 24 #define SBI_SPEC_VERSION_MAJOR_OFFSET 24
#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f

3
lib/sbi/Kconfig
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@@ -66,4 +66,7 @@ config SBI_ECALL_SSE
bool "SSE extension" bool "SSE extension"
default y default y
config SBI_ECALL_MPXY
bool "MPXY extension"
default y
endmenu endmenu

3
lib/sbi/objects.mk
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@@ -61,6 +61,9 @@ libsbi-objs-$(CONFIG_SBI_ECALL_DBTR) += sbi_ecall_dbtr.o
carray-sbi_ecall_exts-$(CONFIG_SBI_ECALL_SSE) += ecall_sse carray-sbi_ecall_exts-$(CONFIG_SBI_ECALL_SSE) += ecall_sse
libsbi-objs-$(CONFIG_SBI_ECALL_SSE) += sbi_ecall_sse.o libsbi-objs-$(CONFIG_SBI_ECALL_SSE) += sbi_ecall_sse.o
carray-sbi_ecall_exts-$(CONFIG_SBI_ECALL_MPXY) += ecall_mpxy
libsbi-objs-$(CONFIG_SBI_ECALL_MPXY) += sbi_ecall_mpxy.o
libsbi-objs-y += sbi_bitmap.o libsbi-objs-y += sbi_bitmap.o
libsbi-objs-y += sbi_bitops.o libsbi-objs-y += sbi_bitops.o
libsbi-objs-y += sbi_console.o libsbi-objs-y += sbi_console.o

68
lib/sbi/sbi_ecall_mpxy.c Normal file
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@@ -0,0 +1,68 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2024 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <apatel@ventanamicro.com>
*/
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_trap.h>
#include <sbi/sbi_mpxy.h>
static int sbi_ecall_mpxy_handler(unsigned long extid, unsigned long funcid,
struct sbi_trap_regs *regs,
struct sbi_ecall_return *out)
{
int ret = 0;
switch (funcid) {
case SBI_EXT_MPXY_SET_SHMEM:
ret = sbi_mpxy_set_shmem(regs->a0, regs->a1, regs->a2, regs->a3);
break;
case SBI_EXT_MPXY_GET_CHANNEL_IDS:
ret = sbi_mpxy_get_channel_ids(regs->a0);
break;
case SBI_EXT_MPXY_READ_ATTRS:
ret = sbi_mpxy_read_attrs(regs->a0, regs->a1, regs->a2);
break;
case SBI_EXT_MPXY_WRITE_ATTRS:
ret = sbi_mpxy_write_attrs(regs->a0, regs->a1, regs->a2);
break;
case SBI_EXT_MPXY_SEND_MSG_WITH_RESP:
ret = sbi_mpxy_send_message(regs->a0, regs->a1,
regs->a2, &out->value);
break;
case SBI_EXT_MPXY_SEND_MSG_NO_RESP:
ret = sbi_mpxy_send_message(regs->a0, regs->a1, regs->a2,
NULL);
break;
case SBI_EXT_MPXY_GET_NOTIFICATION_EVENTS:
ret = sbi_mpxy_get_notification_events(regs->a0, &out->value);
break;
default:
ret = SBI_ENOTSUPP;
}
return ret;
}
struct sbi_ecall_extension ecall_mpxy;
static int sbi_ecall_mpxy_register_extensions(void)
{
if (!sbi_mpxy_channel_available())
return 0;
return sbi_ecall_register_extension(&ecall_mpxy);
}
struct sbi_ecall_extension ecall_mpxy = {
.extid_start = SBI_EXT_MPXY,
.extid_end = SBI_EXT_MPXY,
.register_extensions = sbi_ecall_mpxy_register_extensions,
.handle = sbi_ecall_mpxy_handler,
};