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b74cbd8a74
Preparatory work to use common host command code between ARM and x86. Just rename constants, do not change the binary API. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BUG=chrome-os-partner:9614 TEST=make BOARD=link Change-Id: I534d427c9b50103273835a6f32a0ddb622c762b3
57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Host command module for Chrome EC */
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#ifndef __CROS_EC_HOST_COMMAND_H
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#define __CROS_EC_HOST_COMMAND_H
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#include "common.h"
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#include "ec_commands.h"
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/* Host command */
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struct host_command {
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/* Command code. */
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int command;
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/* Handler for the command; data points to parameters/response.
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* returns negative error code if case of failure (using EC_LPC_STATUS
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* codes). sets <response_size> if it returns a payload to the host. */
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int (*handler)(uint8_t *data, int *response_size);
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};
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/* Called by LPC module when a command is written to one of the
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command slots (0=kernel, 1=user). */
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void host_command_received(int slot, int command);
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/* Send errors or success result code to a host command,
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* without response data.
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* <slot> is 0 for kernel-originated commands,
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* 1 for usermode-originated commands.
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* <result> is the error code. */
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void host_send_result(int slot, int result);
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// success results with response data
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/* Send a successful result code along with response data to a host command.
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* <slot> is 0 for kernel-originated commands,
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* 1 for usermode-originated commands.
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* <data> is the buffer with the response payload.
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* <size> is the size of the response buffer. */
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void host_send_response(int slot, const uint8_t *data, int size);
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/* Return a pointer to the host command data buffer. This buffer must
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* only be accessed between a notification to host_command_received()
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* and a subsequent call to lpc_SendHostResponse(). <slot> is 0 for
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* kernel-originated commands, 1 for usermode-originated commands. */
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uint8_t *host_get_buffer(int slot);
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/* Register a host command handler */
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#define DECLARE_HOST_COMMAND(command, routine) \
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const struct host_command __host_cmd_##command \
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__attribute__((section(".rodata.hcmds"))) \
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= {command, routine}
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#endif /* __CROS_EC_HOST_COMMAND_H */
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