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c52cd07407
At the moment, we don't have a common API for working with SM, only the smc_call() function. This approach is not generic and difficult to configure and maintain. This patch adds UCLASS_SM with the generic API: - sm_call() - sm_call_write() - sm_call_read() These functions operate with struct pt_regs, which describes Secure Monitor arguments. Signed-off-by: Alexey Romanov <avromanov@salutedevices.com> Reviewed-by: Simon Glass <sjg@chromium.org> Link: https://lore.kernel.org/r/20230921081346.22157-2-avromanov@salutedevices.com Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2023 SberDevices, Inc.
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*
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* Author: Alexey Romanov <avromanov@salutedevices.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <sm-uclass.h>
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static const struct sm_ops *get_sm_ops(struct udevice *dev)
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{
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return (const struct sm_ops *)dev->driver->ops;
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}
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int sm_call(struct udevice *dev, u32 cmd, s32 *ret, struct pt_regs *args)
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{
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const struct sm_ops *ops = get_sm_ops(dev);
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if (ops->sm_call)
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return ops->sm_call(dev, cmd, ret, args);
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return -ENOSYS;
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}
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int sm_call_read(struct udevice *dev, void *buffer, size_t size,
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u32 cmd, struct pt_regs *args)
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{
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const struct sm_ops *ops = get_sm_ops(dev);
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if (ops->sm_call_read)
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return ops->sm_call_read(dev, buffer, size, cmd,
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args);
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return -ENOSYS;
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}
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int sm_call_write(struct udevice *dev, void *buffer, size_t size,
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u32 cmd, struct pt_regs *args)
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{
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const struct sm_ops *ops = get_sm_ops(dev);
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if (ops->sm_call_write)
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return ops->sm_call_write(dev, buffer, size, cmd,
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args);
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return -ENOSYS;
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}
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UCLASS_DRIVER(sm) = {
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.name = "sm",
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.id = UCLASS_SM,
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};
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