Resguardo inicial

linux-7.2.3/tools/power/acpi/os_specific/service_layers/osunixdir.c

@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: osunixdir - Unix directory access interfaces
+ *
+ * Copyright (C) 2000 - 2026, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <fnmatch.h>
+#include <ctype.h>
+#include <sys/stat.h>
+
+/*
+ * Allocated structure returned from os_open_directory
+ */
+typedef struct external_find_info {
+	char *dir_pathname;
+	DIR *dir_ptr;
+	char temp_buffer[256];
+	char *wildcard_spec;
+	char requested_file_type;
+
+} external_find_info;
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_open_directory
+ *
+ * PARAMETERS:  dir_pathname        - Full pathname to the directory
+ *              wildcard_spec       - string of the form "*.c", etc.
+ *
+ * RETURN:      A directory "handle" to be used in subsequent search operations.
+ *              NULL returned on failure.
+ *
+ * DESCRIPTION: Open a directory in preparation for a wildcard search
+ *
+ ******************************************************************************/
+
+void *acpi_os_open_directory(char *dir_pathname,
+			     char *wildcard_spec, char requested_file_type)
+{
+	struct external_find_info *external_info;
+	DIR *dir;
+
+	/* Allocate the info struct that will be returned to the caller */
+
+	external_info = calloc(1, sizeof(struct external_find_info));
+	if (!external_info) {
+		return (NULL);
+	}
+
+	/* Get the directory stream */
+
+	dir = opendir(dir_pathname);
+	if (!dir) {
+		fprintf(stderr, "Cannot open directory - %s\n", dir_pathname);
+		free(external_info);
+		return (NULL);
+	}
+
+	/* Save the info in the return structure */
+
+	external_info->wildcard_spec = wildcard_spec;
+	external_info->requested_file_type = requested_file_type;
+	external_info->dir_pathname = dir_pathname;
+	external_info->dir_ptr = dir;
+	return (external_info);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_get_next_filename
+ *
+ * PARAMETERS:  dir_handle          - Created via acpi_os_open_directory
+ *
+ * RETURN:      Next filename matched. NULL if no more matches.
+ *
+ * DESCRIPTION: Get the next file in the directory that matches the wildcard
+ *              specification.
+ *
+ ******************************************************************************/
+
+char *acpi_os_get_next_filename(void *dir_handle)
+{
+	struct external_find_info *external_info = dir_handle;
+	struct dirent *dir_entry;
+	char *temp_str;
+	int str_len;
+	struct stat temp_stat;
+	int err;
+
+	while ((dir_entry = readdir(external_info->dir_ptr))) {
+		if (!fnmatch
+		    (external_info->wildcard_spec, dir_entry->d_name, 0)) {
+			if (dir_entry->d_name[0] == '.') {
+				continue;
+			}
+
+			str_len = strlen(dir_entry->d_name) +
+			    strlen(external_info->dir_pathname) + 2;
+
+			temp_str = calloc(str_len, 1);
+			if (!temp_str) {
+				fprintf(stderr,
+					"Could not allocate buffer for temporary string\n");
+				return (NULL);
+			}
+
+			strcpy(temp_str, external_info->dir_pathname);
+			strcat(temp_str, "/");
+			strcat(temp_str, dir_entry->d_name);
+
+			err = stat(temp_str, &temp_stat);
+			if (err == -1) {
+				fprintf(stderr,
+					"Cannot stat file (should not happen) - %s\n",
+					temp_str);
+				free(temp_str);
+				return (NULL);
+			}
+
+			free(temp_str);
+
+			if ((S_ISDIR(temp_stat.st_mode)
+			     && (external_info->requested_file_type ==
+				 REQUEST_DIR_ONLY))
+			    || ((!S_ISDIR(temp_stat.st_mode)
+				 && external_info->requested_file_type ==
+				 REQUEST_FILE_ONLY))) {
+
+				/* copy to a temp buffer because dir_entry struct is on the stack */
+
+				strcpy(external_info->temp_buffer,
+				       dir_entry->d_name);
+				return (external_info->temp_buffer);
+			}
+		}
+	}
+
+	return (NULL);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_close_directory
+ *
+ * PARAMETERS:  dir_handle          - Created via acpi_os_open_directory
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Close the open directory and cleanup.
+ *
+ ******************************************************************************/
+
+void acpi_os_close_directory(void *dir_handle)
+{
+	struct external_find_info *external_info = dir_handle;
+
+	/* Close the directory and free allocations */
+
+	closedir(external_info->dir_ptr);
+	free(dir_handle);
+}

linux-7.2.3/tools/power/acpi/os_specific/service_layers/osunixmap.c

@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: osunixmap - Unix OSL for file mappings
+ *
+ * Copyright (C) 2000 - 2026, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include "acpidump.h"
+#include <unistd.h>
+#include <sys/mman.h>
+#ifdef _free_BSD
+#include <sys/param.h>
+#endif
+
+#define _COMPONENT          ACPI_OS_SERVICES
+ACPI_MODULE_NAME("osunixmap")
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+#if defined(_dragon_fly) || defined(_free_BSD) || defined(_QNX)
+#define MMAP_FLAGS          MAP_SHARED
+#else
+#define MMAP_FLAGS          MAP_PRIVATE
+#endif
+#define SYSTEM_MEMORY       "/dev/mem"
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_get_page_size
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Page size of the platform.
+ *
+ * DESCRIPTION: Obtain page size of the platform.
+ *
+ ******************************************************************************/
+static acpi_size acpi_os_get_page_size(void)
+{
+
+#ifdef PAGE_SIZE
+	return PAGE_SIZE;
+#else
+	return sysconf(_SC_PAGESIZE);
+#endif
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_map_memory
+ *
+ * PARAMETERS:  where               - Physical address of memory to be mapped
+ *              length              - How much memory to map
+ *
+ * RETURN:      Pointer to mapped memory. Null on error.
+ *
+ * DESCRIPTION: Map physical memory into local address space.
+ *
+ *****************************************************************************/
+
+void *acpi_os_map_memory(acpi_physical_address where, acpi_size length)
+{
+	u8 *mapped_memory;
+	acpi_physical_address offset;
+	acpi_size page_size;
+	int fd;
+
+	fd = open(SYSTEM_MEMORY, O_RDONLY | O_BINARY);
+	if (fd < 0) {
+		fprintf(stderr, "Cannot open %s\n", SYSTEM_MEMORY);
+		return (NULL);
+	}
+
+	/* Align the offset to use mmap */
+
+	page_size = acpi_os_get_page_size();
+	offset = where % page_size;
+
+	/* Map the table header to get the length of the full table */
+
+	mapped_memory = mmap(NULL, (length + offset), PROT_READ, MMAP_FLAGS,
+			     fd, (where - offset));
+	if (mapped_memory == MAP_FAILED) {
+		fprintf(stderr, "Cannot map %s\n", SYSTEM_MEMORY);
+		close(fd);
+		return (NULL);
+	}
+
+	close(fd);
+	return (ACPI_CAST8(mapped_memory + offset));
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_unmap_memory
+ *
+ * PARAMETERS:  where               - Logical address of memory to be unmapped
+ *              length              - How much memory to unmap
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Delete a previously created mapping. Where and Length must
+ *              correspond to a previous mapping exactly.
+ *
+ *****************************************************************************/
+
+void acpi_os_unmap_memory(void *where, acpi_size length)
+{
+	acpi_physical_address offset;
+	acpi_size page_size;
+
+	page_size = acpi_os_get_page_size();
+	offset = ACPI_TO_INTEGER(where) % page_size;
+	munmap((u8 *)where - offset, (length + offset));
+}