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path: root/drivers/firmware/efi/fdt.c
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Diffstat (limited to 'drivers/firmware/efi/fdt.c')
-rw-r--r--drivers/firmware/efi/fdt.c275
1 files changed, 0 insertions, 275 deletions
diff --git a/drivers/firmware/efi/fdt.c b/drivers/firmware/efi/fdt.c
deleted file mode 100644
index 507a3df46a5d..000000000000
--- a/drivers/firmware/efi/fdt.c
+++ /dev/null
@@ -1,275 +0,0 @@
-/*
- * FDT related Helper functions used by the EFI stub on multiple
- * architectures. This should be #included by the EFI stub
- * implementation files.
- *
- * Copyright 2013 Linaro Limited; author Roy Franz
- *
- * This file is part of the Linux kernel, and is made available
- * under the terms of the GNU General Public License version 2.
- *
- */
-
-static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
- unsigned long orig_fdt_size,
- void *fdt, int new_fdt_size, char *cmdline_ptr,
- u64 initrd_addr, u64 initrd_size,
- efi_memory_desc_t *memory_map,
- unsigned long map_size, unsigned long desc_size,
- u32 desc_ver)
-{
- int node, prev;
- int status;
- u32 fdt_val32;
- u64 fdt_val64;
-
- /* Do some checks on provided FDT, if it exists*/
- if (orig_fdt) {
- if (fdt_check_header(orig_fdt)) {
- pr_efi_err(sys_table, "Device Tree header not valid!\n");
- return EFI_LOAD_ERROR;
- }
- /*
- * We don't get the size of the FDT if we get if from a
- * configuration table.
- */
- if (orig_fdt_size && fdt_totalsize(orig_fdt) > orig_fdt_size) {
- pr_efi_err(sys_table, "Truncated device tree! foo!\n");
- return EFI_LOAD_ERROR;
- }
- }
-
- if (orig_fdt)
- status = fdt_open_into(orig_fdt, fdt, new_fdt_size);
- else
- status = fdt_create_empty_tree(fdt, new_fdt_size);
-
- if (status != 0)
- goto fdt_set_fail;
-
- /*
- * Delete any memory nodes present. We must delete nodes which
- * early_init_dt_scan_memory may try to use.
- */
- prev = 0;
- for (;;) {
- const char *type;
- int len;
-
- node = fdt_next_node(fdt, prev, NULL);
- if (node < 0)
- break;
-
- type = fdt_getprop(fdt, node, "device_type", &len);
- if (type && strncmp(type, "memory", len) == 0) {
- fdt_del_node(fdt, node);
- continue;
- }
-
- prev = node;
- }
-
- node = fdt_subnode_offset(fdt, 0, "chosen");
- if (node < 0) {
- node = fdt_add_subnode(fdt, 0, "chosen");
- if (node < 0) {
- status = node; /* node is error code when negative */
- goto fdt_set_fail;
- }
- }
-
- if ((cmdline_ptr != NULL) && (strlen(cmdline_ptr) > 0)) {
- status = fdt_setprop(fdt, node, "bootargs", cmdline_ptr,
- strlen(cmdline_ptr) + 1);
- if (status)
- goto fdt_set_fail;
- }
-
- /* Set initrd address/end in device tree, if present */
- if (initrd_size != 0) {
- u64 initrd_image_end;
- u64 initrd_image_start = cpu_to_fdt64(initrd_addr);
-
- status = fdt_setprop(fdt, node, "linux,initrd-start",
- &initrd_image_start, sizeof(u64));
- if (status)
- goto fdt_set_fail;
- initrd_image_end = cpu_to_fdt64(initrd_addr + initrd_size);
- status = fdt_setprop(fdt, node, "linux,initrd-end",
- &initrd_image_end, sizeof(u64));
- if (status)
- goto fdt_set_fail;
- }
-
- /* Add FDT entries for EFI runtime services in chosen node. */
- node = fdt_subnode_offset(fdt, 0, "chosen");
- fdt_val64 = cpu_to_fdt64((u64)(unsigned long)sys_table);
- status = fdt_setprop(fdt, node, "linux,uefi-system-table",
- &fdt_val64, sizeof(fdt_val64));
- if (status)
- goto fdt_set_fail;
-
- fdt_val64 = cpu_to_fdt64((u64)(unsigned long)memory_map);
- status = fdt_setprop(fdt, node, "linux,uefi-mmap-start",
- &fdt_val64, sizeof(fdt_val64));
- if (status)
- goto fdt_set_fail;
-
- fdt_val32 = cpu_to_fdt32(map_size);
- status = fdt_setprop(fdt, node, "linux,uefi-mmap-size",
- &fdt_val32, sizeof(fdt_val32));
- if (status)
- goto fdt_set_fail;
-
- fdt_val32 = cpu_to_fdt32(desc_size);
- status = fdt_setprop(fdt, node, "linux,uefi-mmap-desc-size",
- &fdt_val32, sizeof(fdt_val32));
- if (status)
- goto fdt_set_fail;
-
- fdt_val32 = cpu_to_fdt32(desc_ver);
- status = fdt_setprop(fdt, node, "linux,uefi-mmap-desc-ver",
- &fdt_val32, sizeof(fdt_val32));
- if (status)
- goto fdt_set_fail;
-
- /*
- * Add kernel version banner so stub/kernel match can be
- * verified.
- */
- status = fdt_setprop_string(fdt, node, "linux,uefi-stub-kern-ver",
- linux_banner);
- if (status)
- goto fdt_set_fail;
-
- return EFI_SUCCESS;
-
-fdt_set_fail:
- if (status == -FDT_ERR_NOSPACE)
- return EFI_BUFFER_TOO_SMALL;
-
- return EFI_LOAD_ERROR;
-}
-
-#ifndef EFI_FDT_ALIGN
-#define EFI_FDT_ALIGN EFI_PAGE_SIZE
-#endif
-
-/*
- * Allocate memory for a new FDT, then add EFI, commandline, and
- * initrd related fields to the FDT. This routine increases the
- * FDT allocation size until the allocated memory is large
- * enough. EFI allocations are in EFI_PAGE_SIZE granules,
- * which are fixed at 4K bytes, so in most cases the first
- * allocation should succeed.
- * EFI boot services are exited at the end of this function.
- * There must be no allocations between the get_memory_map()
- * call and the exit_boot_services() call, so the exiting of
- * boot services is very tightly tied to the creation of the FDT
- * with the final memory map in it.
- */
-
-efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
- void *handle,
- unsigned long *new_fdt_addr,
- unsigned long max_addr,
- u64 initrd_addr, u64 initrd_size,
- char *cmdline_ptr,
- unsigned long fdt_addr,
- unsigned long fdt_size)
-{
- unsigned long map_size, desc_size;
- u32 desc_ver;
- unsigned long mmap_key;
- efi_memory_desc_t *memory_map;
- unsigned long new_fdt_size;
- efi_status_t status;
-
- /*
- * Estimate size of new FDT, and allocate memory for it. We
- * will allocate a bigger buffer if this ends up being too
- * small, so a rough guess is OK here.
- */
- new_fdt_size = fdt_size + EFI_PAGE_SIZE;
- while (1) {
- status = efi_high_alloc(sys_table, new_fdt_size, EFI_FDT_ALIGN,
- new_fdt_addr, max_addr);
- if (status != EFI_SUCCESS) {
- pr_efi_err(sys_table, "Unable to allocate memory for new device tree.\n");
- goto fail;
- }
-
- /*
- * Now that we have done our final memory allocation (and free)
- * we can get the memory map key needed for
- * exit_boot_services().
- */
- status = efi_get_memory_map(sys_table, &memory_map, &map_size,
- &desc_size, &desc_ver, &mmap_key);
- if (status != EFI_SUCCESS)
- goto fail_free_new_fdt;
-
- status = update_fdt(sys_table,
- (void *)fdt_addr, fdt_size,
- (void *)*new_fdt_addr, new_fdt_size,
- cmdline_ptr, initrd_addr, initrd_size,
- memory_map, map_size, desc_size, desc_ver);
-
- /* Succeeding the first time is the expected case. */
- if (status == EFI_SUCCESS)
- break;
-
- if (status == EFI_BUFFER_TOO_SMALL) {
- /*
- * We need to allocate more space for the new
- * device tree, so free existing buffer that is
- * too small. Also free memory map, as we will need
- * to get new one that reflects the free/alloc we do
- * on the device tree buffer.
- */
- efi_free(sys_table, new_fdt_size, *new_fdt_addr);
- sys_table->boottime->free_pool(memory_map);
- new_fdt_size += EFI_PAGE_SIZE;
- } else {
- pr_efi_err(sys_table, "Unable to constuct new device tree.\n");
- goto fail_free_mmap;
- }
- }
-
- /* Now we are ready to exit_boot_services.*/
- status = sys_table->boottime->exit_boot_services(handle, mmap_key);
-
-
- if (status == EFI_SUCCESS)
- return status;
-
- pr_efi_err(sys_table, "Exit boot services failed.\n");
-
-fail_free_mmap:
- sys_table->boottime->free_pool(memory_map);
-
-fail_free_new_fdt:
- efi_free(sys_table, new_fdt_size, *new_fdt_addr);
-
-fail:
- return EFI_LOAD_ERROR;
-}
-
-static void *get_fdt(efi_system_table_t *sys_table)
-{
- efi_guid_t fdt_guid = DEVICE_TREE_GUID;
- efi_config_table_t *tables;
- void *fdt;
- int i;
-
- tables = (efi_config_table_t *) sys_table->tables;
- fdt = NULL;
-
- for (i = 0; i < sys_table->nr_tables; i++)
- if (efi_guidcmp(tables[i].guid, fdt_guid) == 0) {
- fdt = (void *) tables[i].table;
- break;
- }
-
- return fdt;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-24 19:56:38 +0000