mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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2650ff3d70
Add CONFIG_LTO to use GCC Link-Time Optimizations to try to reduce the flash footprint of the firmware. Add additional protection to some functions/data to avoid removal by the linker when their usage is not obvious. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=none TEST=make buildall (with and without LTO enable on all boards) Change-Id: I586b8c1eda4592b416c85383b65153c1d5ab0059 Reviewed-on: https://chromium-review.googlesource.com/271291 Trybot-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org> Reviewed-by: Alec Berg <alecaberg@chromium.org> Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/* Copyright (c) 2013 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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/* common.h - Common includes for Chrome EC */
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#ifndef __CROS_EC_COMMON_H
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#define __CROS_EC_COMMON_H
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#include <stdint.h>
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/*
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* Macros to concatenate 2 - 4 tokens together to form a single token.
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* Multiple levels of nesting are required to convince the preprocessor to
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* expand currently-defined tokens before concatenation.
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*
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* For example, if you have
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* #define FOO 1
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* #define BAR1 42
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* Then
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* #define BAZ CONCAT2(BAR, FOO)
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* Will evaluate to BAR1, which then evaluates to 42.
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*/
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#define CONCAT_STAGE_1(w, x, y, z) w ## x ## y ## z
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#define CONCAT2(w, x) CONCAT_STAGE_1(w, x, , )
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#define CONCAT3(w, x, y) CONCAT_STAGE_1(w, x, y, )
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#define CONCAT4(w, x, y, z) CONCAT_STAGE_1(w, x, y, z)
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/*
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* Macros to turn the argument into a string constant.
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*
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* Compared to directly using the preprocessor # operator, this 2-stage macro
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* is safe with regards to using nested macros and defined arguments.
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*/
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#define STRINGIFY0(name) #name
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#define STRINGIFY(name) STRINGIFY0(name)
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/* Macros to access registers */
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#define REG32_ADDR(addr) ((volatile uint32_t *)(addr))
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#define REG16_ADDR(addr) ((volatile uint16_t *)(addr))
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#define REG8_ADDR(addr) ((volatile uint8_t *)(addr))
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#define REG32(addr) (*REG32_ADDR(addr))
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#define REG16(addr) (*REG16_ADDR(addr))
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#define REG8(addr) (*REG8_ADDR(addr))
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/*
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* Define __aligned(n) and __packed if someone hasn't beat us to it. Linux
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* kernel style checking prefers these over __attribute__((packed)) and
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* __attribute__((aligned(n))).
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*/
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#ifndef __aligned
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#define __aligned(n) __attribute__((aligned(n)))
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#endif
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#ifndef __packed
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#define __packed __attribute__((packed))
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#endif
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/*
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* Force the toolchain to keep a symbol even with Link Time Optimization
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* activated.
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*
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* Useful for C functions called only from assembly or through special sections.
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*/
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#ifndef __keep
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#define __keep __attribute__((used)) __attribute__((externally_visible))
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#endif
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/* There isn't really a better place for this */
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#define C_TO_K(temp_c) ((temp_c) + 273)
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#define K_TO_C(temp_c) ((temp_c) - 273)
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#define CELSIUS_TO_DECI_KELVIN(temp_c) ((temp_c) * 10 + 2731)
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#define DECI_KELVIN_TO_CELSIUS(temp_dk) ((temp_dk - 2731) / 10)
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/* Include top-level configuration file */
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#include "config.h"
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/* Canonical list of module IDs */
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#include "module_id.h"
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/* List of common error codes that can be returned */
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enum ec_error_list {
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/* Success - no error */
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EC_SUCCESS = 0,
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/* Unknown error */
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EC_ERROR_UNKNOWN = 1,
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/* Function not implemented yet */
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EC_ERROR_UNIMPLEMENTED = 2,
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/* Overflow error; too much input provided. */
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EC_ERROR_OVERFLOW = 3,
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/* Timeout */
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EC_ERROR_TIMEOUT = 4,
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/* Invalid argument */
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EC_ERROR_INVAL = 5,
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/* Already in use, or not ready yet */
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EC_ERROR_BUSY = 6,
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/* Access denied */
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EC_ERROR_ACCESS_DENIED = 7,
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/* Failed because component does not have power */
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EC_ERROR_NOT_POWERED = 8,
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/* Failed because component is not calibrated */
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EC_ERROR_NOT_CALIBRATED = 9,
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/* Failed because CRC error */
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EC_ERROR_CRC = 10,
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/* Invalid console command param (PARAMn means parameter n is bad) */
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EC_ERROR_PARAM1 = 11,
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EC_ERROR_PARAM2 = 12,
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EC_ERROR_PARAM3 = 13,
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EC_ERROR_PARAM4 = 14,
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EC_ERROR_PARAM5 = 15,
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EC_ERROR_PARAM6 = 16,
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EC_ERROR_PARAM7 = 17,
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EC_ERROR_PARAM8 = 18,
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EC_ERROR_PARAM9 = 19,
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EC_ERROR_PARAM_COUNT = 20, /* Wrong number of params */
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/* Module-internal error codes may use this range. */
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EC_ERROR_INTERNAL_FIRST = 0x10000,
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EC_ERROR_INTERNAL_LAST = 0x1FFFF
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};
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/*
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* Define test_mockable and test_mockable_static for mocking
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* functions.
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*/
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#ifdef TEST_BUILD
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#define test_mockable __attribute__((weak))
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#define test_mockable_static __attribute__((weak))
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#define test_export_static
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#else
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#define test_mockable
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#define test_mockable_static static
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#define test_export_static static
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#endif
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/*
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* accessor allowing to override some read only data accesses.
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* used to workaround a buggy toolchain (cf http://crosbug.com/p/24378)
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*/
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#ifndef RO
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#define RO(var) var
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#endif
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#endif /* __CROS_EC_COMMON_H */
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