ACPI实现枚举总线(platform、SPI、I2C和某些情况下的UART)后面的设备,创建物理设备并将它们绑定到ACPI命名空间中的ACPI句柄。 这意味着当ACPI_HANDLE(dev)返回非null时,设备从ACPI命名空间枚举。此句柄可用于提取其他特定于设备的配置。下面是一个例子。 Platform总线支持 由于我们使用平台设备来表示没有连接到任何物理总...
5.1 首先会判断acpi句柄是否为ACPI的根对象,如果是,则会直接添加id节点到pnp->ids的链表中去。 5.2 接下来,调用acpi_get_object_info函数: acpi_status acpi_get_object_info(acpi_handle handle,struct acpi_device_info **return_buffer) 通过acpi_get_object_info这个函数得到设备的_HID和_CIDs信息,获取之前...
struct acpi_device *device = root->device; int node = acpi_get_node(device->handle); struct pci_bus *bus; struct pci_host_bridge *host_bridge;//caq:一个apci_pci_root产生一个pci的host_bridge info->root = root; info->bridge = device; info->ops = ops; INIT_LIST_HEAD(&info->resou...
staticint__acpi_dev_get_resources(structacpi_device*adev,structlist_head*list,int(*preproc)(structacpi_resource*,void*),void*preproc_data,char*method){structres_proc_contextc;acpi_statusstatus;if(!adev||!adev->handle||!list_empty(list))return-EINVAL;if(!acpi_has_method(adev->handle,m...
acpi_handle handle) { struct acpi_device *device = NULL; int ret; acpi_bus_get_device(handle&device); if (!acpi_device_enumerated(device)) { ret acpibus_scan(handle); if (ret) pr_("erroradding bus, %x\n", -ret); } } /** * dock_remove_acpi_device - remove ...
ACPI_HANDLE hNode, hPackage; ACPI_STATUS Status; // 1.获取硬件节点 Status = acpi_get_handle(ACPI_GET_HANDLE_PHYSICAL_PROCESS, &hNode); if (ACPI_FAILURE(Status)) { printf("Failed to get handle "); return -1; } // 2.创建一个操作 Package Status = acpi_create_package(hNode, "com...
status = acpi_get_handle(NULL, "\\_SB", &handle); if (ACPI_FAILURE(status)) return; if (acpi_has_method(handle, "PCCH")) cpufreq_add_device("pcc-cpufreq"); } #else static void __init acpi_pcc_cpufreq_init(void) {} ...
laptops and mobile devices offer features like instant-on and swift resume from sleep mode, ensuring a seamless and responsive user experience. this technology enhances portability, making your device an efficient companion on the go. how does acpi handle system sleep states, and what are their im...
ret = acpi_get_psd(cpc_ptr, handle); if (ret) return ret; (*parsed_core_num)++; return AE_OK; } int acpi_get_psd_map(struct cppc_cpudata **all_cpu_data) { struct cpc_desc **cpc_pptr, *cpc_ptr; int parsed_core_num = 0; ...
SwContext.SwSmiInputValue = (UINTN) PcdGet8 (PcdAcpiEnableSwSmi);Status = SwDispatch->Register (SwDispatch,EnableAcpiCallback,&SwContext,&SwHandle); 同理,Bios为了支持windows开启ACPI,也会以同样的方式注册SMI处理函数。对于VMware,它注册的值...