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lib: utils: Add simple FDT based HSM driver framework

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

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
This commit is contained in:
Anup Patel
2024-08-06 10:45:11 +05:30
committed by Anup Patel
parent 9d760b810e
commit ff4769bf08
8 changed files with 77 additions and 0 deletions
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26
include/sbi_utils/hsm/fdt_hsm.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_HSM_H__
#define __FDT_HSM_H__
#include <sbi/sbi_types.h>
#include <sbi_utils/fdt/fdt_driver.h>
#ifdef CONFIG_FDT_HSM
void fdt_hsm_init(const void *fdt);
#else
static inline void fdt_hsm_init(const void *fdt) { }
#endif
#endif

2
lib/utils/Kconfig
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@@ -6,6 +6,8 @@ source "$(OPENSBI_SRC_DIR)/lib/utils/fdt/Kconfig"
source "$(OPENSBI_SRC_DIR)/lib/utils/gpio/Kconfig"
source "$(OPENSBI_SRC_DIR)/lib/utils/hsm/Kconfig"
source "$(OPENSBI_SRC_DIR)/lib/utils/i2c/Kconfig"
source "$(OPENSBI_SRC_DIR)/lib/utils/ipi/Kconfig"

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

22
lib/utils/hsm/fdt_hsm.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/hsm/fdt_hsm.h>
/* List of FDT HSM drivers generated at compile time */
extern const struct fdt_driver *const fdt_hsm_drivers[];
void fdt_hsm_init(const void *fdt)
{
/*
* Platforms might have multiple HSM devices or might
* not have any so probe all and don't fail.
*/
fdt_driver_init_all(fdt, fdt_hsm_drivers);
}

3
lib/utils/hsm/fdt_hsm_drivers.carray Normal file
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@@ -0,0 +1,3 @@
HEADER: sbi_utils/hsm/fdt_hsm.h
TYPE: const struct fdt_driver
NAME: fdt_hsm_drivers

11
lib/utils/hsm/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-$(CONFIG_FDT_HSM) += hsm/fdt_hsm.o
libsbiutils-objs-$(CONFIG_FDT_HSM) += hsm/fdt_hsm_drivers.carray.o

1
platform/generic/configs/defconfig
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@@ -10,6 +10,7 @@ CONFIG_FDT_GPIO=y
CONFIG_FDT_GPIO_DESIGNWARE=y
CONFIG_FDT_GPIO_SIFIVE=y
CONFIG_FDT_GPIO_STARFIVE=y
CONFIG_FDT_HSM=y
CONFIG_FDT_I2C=y
CONFIG_FDT_I2C_SIFIVE=y
CONFIG_FDT_I2C_DW=y

2
platform/generic/platform.c
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@@ -21,6 +21,7 @@
#include <sbi_utils/fdt/fdt_fixup.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/fdt/fdt_pmu.h>
#include <sbi_utils/hsm/fdt_hsm.h>
#include <sbi_utils/irqchip/fdt_irqchip.h>
#include <sbi_utils/irqchip/imsic.h>
#include <sbi_utils/serial/fdt_serial.h>
@@ -249,6 +250,7 @@ static int generic_early_init(bool cold_boot)
if (cold_boot) {
fdt_reset_init(fdt);
fdt_suspend_init(fdt);
fdt_hsm_init(fdt);
if (semihosting_enabled())
rc = semihosting_init();