25173f71cd
In many cases suspending or resuming of a device is limited to just a few register writes. Current solution assumes that those operations may be blocking, asynchronous and take a lot of time. Due to this assumption runtime PM API cannot be effectively used from the interrupt context. Zephyr has few driver APIs which can be used from an interrupt context and now use of runtime PM is limited in those cases. Patch introduces a new type of PM device - synchronous PM. If device is specified as capable of synchronous PM operations then device runtime getting and putting is executed in the critical section. In that case, runtime API can be used from an interrupt context. Additionally, this approach reduces RAM needed for PM device (104 -> 20 bytes of RAM on ARM Cortex-M). Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/device.h>
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#include <zephyr/pm/device.h>
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#include "kernel_internal.h"
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#ifndef ZEPHYR_KERNEL_INCLUDE_KERNEL_OFFSETS_H_
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#define ZEPHYR_KERNEL_INCLUDE_KERNEL_OFFSETS_H_
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#include <syscall_list.h>
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/* All of this is build time magic, but LCOV gets confused. Disable coverage
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* for this whole file.
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*
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* LCOV_EXCL_START
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*/
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/*
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* The final link step uses the symbol _OffsetAbsSyms to force the linkage of
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* offsets.o into the ELF image.
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*/
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GEN_ABS_SYM_BEGIN(_OffsetAbsSyms)
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GEN_OFFSET_SYM(_cpu_t, current);
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GEN_OFFSET_SYM(_cpu_t, nested);
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GEN_OFFSET_SYM(_cpu_t, irq_stack);
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GEN_OFFSET_SYM(_cpu_t, arch);
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GEN_OFFSET_SYM(_kernel_t, cpus);
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#if defined(CONFIG_FPU_SHARING)
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GEN_OFFSET_SYM(_cpu_t, fp_ctx);
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#endif
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#ifdef CONFIG_PM
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GEN_OFFSET_SYM(_kernel_t, idle);
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#endif
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#ifndef CONFIG_SCHED_CPU_MASK_PIN_ONLY
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GEN_OFFSET_SYM(_kernel_t, ready_q);
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#endif
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#ifndef CONFIG_SMP
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GEN_OFFSET_SYM(_ready_q_t, cache);
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#endif
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#ifdef CONFIG_FPU_SHARING
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GEN_OFFSET_SYM(_kernel_t, current_fp);
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#endif
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GEN_OFFSET_SYM(_thread_base_t, user_options);
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GEN_OFFSET_SYM(_thread_t, base);
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GEN_OFFSET_SYM(_thread_t, callee_saved);
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GEN_OFFSET_SYM(_thread_t, arch);
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#ifdef CONFIG_USE_SWITCH
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GEN_OFFSET_SYM(_thread_t, switch_handle);
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#endif
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#ifdef CONFIG_THREAD_STACK_INFO
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GEN_OFFSET_SYM(_thread_t, stack_info);
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#endif
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#ifdef CONFIG_THREAD_LOCAL_STORAGE
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GEN_OFFSET_SYM(_thread_t, tls);
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#endif
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GEN_ABSOLUTE_SYM(__z_interrupt_stack_SIZEOF, sizeof(z_interrupt_stacks[0]));
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/* member offsets in the device structure. Used in image post-processing */
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#ifdef CONFIG_DEVICE_DEPS
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GEN_ABSOLUTE_SYM(_DEVICE_STRUCT_HANDLES_OFFSET,
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offsetof(struct device, deps));
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#endif
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#ifdef CONFIG_PM_DEVICE
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GEN_ABSOLUTE_SYM(_DEVICE_STRUCT_PM_OFFSET,
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offsetof(struct device, pm));
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#endif
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/* member offsets in the pm_device structure. Used in image post-processing */
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GEN_ABSOLUTE_SYM(_PM_DEVICE_STRUCT_FLAGS_OFFSET,
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offsetof(struct pm_device_base, flags));
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GEN_ABSOLUTE_SYM(_PM_DEVICE_FLAG_PD, PM_DEVICE_FLAG_PD);
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/* LCOV_EXCL_STOP */
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#endif /* ZEPHYR_KERNEL_INCLUDE_KERNEL_OFFSETS_H_ */
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