mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-27 18:25:05 +00:00
8c4421759d
Even when CONFIG_RESTRICTED_CONSOLE_COMMANDS is enabled, there are many commands that can't do anything dangerous. This marks some of those commands as safe to use, even when restrictions are enforced. I'm only marking commands that are used by the Cr50, since that's the only board that has restrictions. BUG=chrome-os-partner:55322 BRANCH=none TEST=make buildall, test on Cr50 hardware Change-Id: I6289d332830175b6adcb6b20cb4c21d01d27a25e Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/376188 Reviewed-by: Randall Spangler <rspangler@chromium.org>
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
/* Shared memory module for Chrome EC */
|
|
|
|
#include "common.h"
|
|
#include "console.h"
|
|
#include "link_defs.h"
|
|
#include "shared_mem.h"
|
|
#include "system.h"
|
|
#include "util.h"
|
|
|
|
static int buf_in_use;
|
|
static int max_used;
|
|
|
|
int shared_mem_size(void)
|
|
{
|
|
/*
|
|
* Use all the RAM we can. The shared memory buffer is the last thing
|
|
* allocated from the start of RAM, so we can use everything up to the
|
|
* jump data at the end of RAM.
|
|
*/
|
|
return system_usable_ram_end() - (uintptr_t)__shared_mem_buf;
|
|
}
|
|
|
|
int shared_mem_acquire(int size, char **dest_ptr)
|
|
{
|
|
if (size > shared_mem_size() || size <= 0)
|
|
return EC_ERROR_INVAL;
|
|
|
|
if (buf_in_use)
|
|
return EC_ERROR_BUSY;
|
|
|
|
/*
|
|
* We could guard buf_in_use with a mutex, but since shared memory is
|
|
* currently only used by debug commands, that's overkill.
|
|
*/
|
|
|
|
buf_in_use = size;
|
|
*dest_ptr = __shared_mem_buf;
|
|
|
|
if (max_used < size)
|
|
max_used = size;
|
|
|
|
return EC_SUCCESS;
|
|
}
|
|
|
|
void shared_mem_release(void *ptr)
|
|
{
|
|
buf_in_use = 0;
|
|
}
|
|
|
|
#ifdef CONFIG_CMD_SHMEM
|
|
static int command_shmem(int argc, char **argv)
|
|
{
|
|
ccprintf("Size:%6d\n", shared_mem_size());
|
|
ccprintf("Used:%6d\n", buf_in_use);
|
|
ccprintf("Max: %6d\n", max_used);
|
|
return EC_SUCCESS;
|
|
}
|
|
DECLARE_SAFE_CONSOLE_COMMAND(shmem, command_shmem,
|
|
NULL,
|
|
"Print shared memory stats");
|
|
#endif
|