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https://github.com/Telecominfraproject/OpenCellular.git
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c21f07e58e
Instead of using a runtime callback to register the console commands, put them in a special linker section. So we can do a macro to "register" them during the build. It saves 684 bytes and a few microseconds at startup. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BUG=None TEST=run a few commands from the BDS command line. Change-Id: Id33ea210b9035bf76ed720373c74c5dd24ccd1b1
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/* Copyright (c) 2011 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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/* Port 80 module for Chrome EC */
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#include "console.h"
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#include "port80.h"
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#include "uart.h"
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#include "util.h"
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#define HISTORY_LEN 16
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static uint8_t history[HISTORY_LEN];
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static int head = 0; /* Next index to use / oldest previous entry */
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static int last_data = -1; /* Last data written to port 80 */
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void port_80_write(int data)
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{
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/* Ignore duplicate writes, since the linux kernel writes to port 80
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* as a delay mechanism during boot. */
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if (data == last_data)
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return;
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/* TODO: post to SWI and print from there? This currently
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* prints from inside the LPC interrupt itself. */
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uart_printf("[Port 80: 0x%02x]\n", data);
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last_data = data;
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history[head] = data;
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head = (head + 1) & (HISTORY_LEN - 1);
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}
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/*****************************************************************************/
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/* Console commands */
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static int command_port80(int argc, char **argv)
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{
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int h = head;
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int i;
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/* Technically, if a port 80 write comes in while we're
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* printing this, we could print an incorrect history.
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* Probably not worth the complexity to work around that. */
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uart_puts("Last port 80 writes:");
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for (i = 0; i < HISTORY_LEN; i++)
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uart_printf(" %02x", history[(h + i) & (HISTORY_LEN - 1)]);
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uart_puts(" <--newest\n");
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(port80, command_port80);
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/*****************************************************************************/
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/* Initialization */
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int port_80_init(void)
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{
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memset(history, 0, sizeof(history));
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return EC_SUCCESS;
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}
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