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lib: utils: Add simple FDT based MPXY driver framework

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The generic platform can have multiple MPXY drivers so add a simple
FDT based MPXY driver framework.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
This commit is contained in:
Anup Patel
2024-08-08 11:11:10 +05:30
committed by Anup Patel
parent e67d91cdcc
commit 32577ec3a1
8 changed files with 85 additions and 0 deletions
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26
include/sbi_utils/mpxy/fdt_mpxy.h Normal file
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@@ -0,0 +1,26 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2024 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <apatel@ventanamicro.com>
*/
#ifndef __FDT_MPXY_H__
#define __FDT_MPXY_H__
#include <sbi/sbi_types.h>
#include <sbi_utils/fdt/fdt_driver.h>
#ifdef CONFIG_FDT_MPXY
void fdt_mpxy_init(const void *fdt);
#else
static inline void fdt_mpxy_init(const void *fdt) { }
#endif
#endif

2
lib/utils/Kconfig
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@@ -32,4 +32,6 @@ source "$(OPENSBI_SRC_DIR)/lib/utils/sys/Kconfig"
source "$(OPENSBI_SRC_DIR)/lib/utils/timer/Kconfig"
source "$(OPENSBI_SRC_DIR)/lib/utils/mpxy/Kconfig"
endmenu

10
lib/utils/mpxy/Kconfig Normal file
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@@ -0,0 +1,10 @@
# SPDX-License-Identifier: BSD-2-Clause
menu "MPXY Device Support"
config FDT_MPXY
bool "FDT based MPXY drivers"
depends on FDT
default n
endmenu

22
lib/utils/mpxy/fdt_mpxy.c Normal file
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@@ -0,0 +1,22 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2024 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <apatel@ventanamicro.com>
*/
#include <sbi_utils/mpxy/fdt_mpxy.h>
/* List of FDT MPXY drivers generated at compile time */
extern const struct fdt_driver *const fdt_mpxy_drivers[];
void fdt_mpxy_init(const void *fdt)
{
/*
* Platforms might have multiple MPXY devices or might not
* have any MPXY devices so don't fail.
*/
fdt_driver_init_all(fdt, fdt_mpxy_drivers);
}

3
lib/utils/mpxy/fdt_mpxy_drivers.carray Normal file
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@@ -0,0 +1,3 @@
HEADER: sbi_utils/mpxy/fdt_mpxy.h
TYPE: const struct fdt_driver
NAME: fdt_mpxy_drivers

11
lib/utils/mpxy/objects.mk Normal file
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@@ -0,0 +1,11 @@
#
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (c) 2024 Ventana Micro Systems Inc.
#
# Authors:
# Anup Patel <apatel@ventanamicro.com>
#
libsbiutils-objs-$(CONFIG_FDT_MPXY) += mpxy/fdt_mpxy.o
libsbiutils-objs-$(CONFIG_FDT_MPXY) += mpxy/fdt_mpxy_drivers.carray.o

1
platform/generic/configs/defconfig
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@@ -53,3 +53,4 @@ CONFIG_FDT_SUSPEND_RPMI=y
CONFIG_FDT_TIMER=y
CONFIG_FDT_TIMER_MTIMER=y
CONFIG_FDT_TIMER_PLMT=y
CONFIG_FDT_MPXY=y

10
platform/generic/platform.c
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@@ -17,6 +17,7 @@
#include <sbi/sbi_string.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_tlb.h>
#include <sbi_utils/mpxy/fdt_mpxy.h>
#include <sbi_utils/cppc/fdt_cppc.h>
#include <sbi_utils/fdt/fdt_domain.h>
#include <sbi_utils/fdt/fdt_fixup.h>
@@ -415,6 +416,14 @@ static uint64_t generic_pmu_xlate_to_mhpmevent(uint32_t event_idx,
return evt_val;
}
static int generic_mpxy_init(void)
{
const void *fdt = fdt_get_address();
fdt_mpxy_init(fdt);
return 0;
}
const struct sbi_platform_operations platform_ops = {
.cold_boot_allowed = generic_cold_boot_allowed,
.nascent_init = generic_nascent_init,
@@ -431,6 +440,7 @@ const struct sbi_platform_operations platform_ops = {
.get_tlbr_flush_limit = generic_tlbr_flush_limit,
.get_tlb_num_entries = generic_tlb_num_entries,
.timer_init = fdt_timer_init,
.mpxy_init = generic_mpxy_init,
.vendor_ext_check = generic_vendor_ext_check,
.vendor_ext_provider = generic_vendor_ext_provider,
};