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da87d12ec8
Some ECs such as the MEC1322 have a data RAM optimized region as well as a code RAM optimized region. We discovered that we could save quite a bit more space by reusing the a portion of the code RAM region as an additional .bss section. However, this region resides in the code RAM region. If on the same cycle the processor fetches an instruction and does a load or store to this code RAM region, the data access will be delayed by one cycle. Hence, the naming of ``.bss.slow" section. For boards which do not define CONFIG_REUSE_LOADER_WITH_BSS_SLOW, all objects bearing this tag will be simply appended to the existing .bss section. BUG=chrome-os-partner:46056 BUG=chrome-os-partner:46063 BRANCH=None TEST=make -j buildall tests CQ-DEPEND=CL:306173 Change-Id: I126fbeee5255732a6dd6fea1d4557fc2b2c62c96 Signed-off-by: Aseda Aboagye <aaboagye@google.com> Reviewed-on: https://chromium-review.googlesource.com/311209 Commit-Ready: Aseda Aboagye <aaboagye@chromium.org> Tested-by: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org>
151 lines
4.2 KiB
C
151 lines
4.2 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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/*
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* Place the object in the .bss.slow region.
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*
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* On boards with unoptimized RAM there is no penalty and it simply is appended
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* to the .bss section.
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*/
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#ifndef __bss_slow
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#define __bss_slow __attribute__((section(".bss.slow")))
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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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EC_ERROR_NOT_HANDLED = 21, /* Interrupt event not handled */
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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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#endif /* __CROS_EC_COMMON_H */
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