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-rw-r--r--lib/efi_loader/efi_bootmgr.c25
-rw-r--r--lib/efi_loader/efi_helper.c85
-rw-r--r--lib/efi_loader/efi_memory.c37
-rw-r--r--lib/efi_loader/elf_efi.ldsi6
4 files changed, 109 insertions, 44 deletions
diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c
index c6124c590d9..f9534ef85ed 100644
--- a/lib/efi_loader/efi_bootmgr.c
+++ b/lib/efi_loader/efi_bootmgr.c
@@ -18,6 +18,8 @@
#include <efi_loader.h>
#include <efi_variable.h>
#include <asm/unaligned.h>
+#include <linux/kernel.h>
+#include <linux/sizes.h>
static const struct efi_boot_services *bs;
static const struct efi_runtime_services *rs;
@@ -348,6 +350,7 @@ static efi_status_t prepare_loaded_image(u16 *label, ulong addr, ulong size,
struct efi_device_path **dp,
struct udevice **blk)
{
+ u64 pages;
efi_status_t ret;
struct udevice *ramdisk_blk;
@@ -362,13 +365,18 @@ static efi_status_t prepare_loaded_image(u16 *label, ulong addr, ulong size,
}
/*
- * TODO: expose the ramdisk to OS.
- * Need to pass the ramdisk information by the architecture-specific
- * methods such as 'pmem' device-tree node.
+ * Linux supports 'pmem' which allows OS installers to find, reclaim
+ * the mounted images and continue the installation since the contents
+ * of the pmem region are treated as local media.
+ *
+ * The memory regions used for it needs to be carved out of the EFI
+ * memory map.
*/
- ret = efi_add_memory_map(addr, size, EFI_RESERVED_MEMORY_TYPE);
+ pages = efi_size_in_pages(size + (addr & EFI_PAGE_MASK));
+ ret = efi_update_memory_map(addr, pages, EFI_CONVENTIONAL_MEMORY,
+ false, true);
if (ret != EFI_SUCCESS) {
- log_err("Memory reservation failed\n");
+ log_err("Failed to reserve memory\n");
goto err;
}
@@ -490,6 +498,13 @@ static efi_status_t try_load_from_uri_path(struct efi_device_path_uri *uridp,
ret = EFI_INVALID_PARAMETER;
goto err;
}
+ /*
+ * Depending on the kernel configuration, pmem memory areas must be
+ * page aligned or 2MiB aligned. PowerPC is an exception here and
+ * requires 16MiB alignment, but since we don't have EFI support for
+ * it, limit the alignment to 2MiB.
+ */
+ image_size = ALIGN(image_size, SZ_2M);
/*
* If the file extension is ".iso" or ".img", mount it and try to load
diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c
index 04b2efc4a3b..8c32059edda 100644
--- a/lib/efi_loader/efi_helper.c
+++ b/lib/efi_loader/efi_helper.c
@@ -5,6 +5,7 @@
#define LOG_CATEGORY LOGC_EFI
+#include <blkmap.h>
#include <bootm.h>
#include <env.h>
#include <image.h>
@@ -454,22 +455,29 @@ efi_status_t efi_env_set_load_options(efi_handle_t handle,
*/
static efi_status_t copy_fdt(void **fdtp)
{
- unsigned long fdt_ram_start = -1L, fdt_pages;
efi_status_t ret = 0;
void *fdt, *new_fdt;
- u64 new_fdt_addr;
- uint fdt_size;
- int i;
+ static u64 new_fdt_addr;
+ static efi_uintn_t fdt_pages;
+ ulong fdt_size;
- for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
- u64 ram_start = gd->bd->bi_dram[i].start;
- u64 ram_size = gd->bd->bi_dram[i].size;
+ /*
+ * Remove the configuration table that might already be
+ * installed, ignoring EFI_NOT_FOUND if no device-tree
+ * is installed
+ */
+ efi_install_configuration_table(&efi_guid_fdt, NULL);
- if (!ram_size)
- continue;
+ if (new_fdt_addr) {
+ log_debug("%s: Found allocated memory at %#llx, with %#zx pages\n",
+ __func__, new_fdt_addr, fdt_pages);
- if (ram_start < fdt_ram_start)
- fdt_ram_start = ram_start;
+ ret = efi_free_pages(new_fdt_addr, fdt_pages);
+ if (ret != EFI_SUCCESS)
+ log_err("Unable to free up existing FDT memory region\n");
+
+ new_fdt_addr = 0;
+ fdt_pages = 0;
}
/*
@@ -485,15 +493,18 @@ static efi_status_t copy_fdt(void **fdtp)
&new_fdt_addr);
if (ret != EFI_SUCCESS) {
log_err("Failed to reserve space for FDT\n");
- goto done;
+ return ret;
}
+ log_debug("%s: Allocated memory at %#llx, with %#zx pages\n",
+ __func__, new_fdt_addr, fdt_pages);
+
new_fdt = (void *)(uintptr_t)new_fdt_addr;
memcpy(new_fdt, fdt, fdt_totalsize(fdt));
fdt_set_totalsize(new_fdt, fdt_size);
- *fdtp = (void *)(uintptr_t)new_fdt_addr;
-done:
- return ret;
+ *fdtp = new_fdt;
+
+ return EFI_SUCCESS;
}
/**
@@ -546,9 +557,6 @@ efi_status_t efi_install_fdt(void *fdt)
const char *fdt_opt;
uintptr_t fdt_addr;
- /* Look for device tree that is already installed */
- if (efi_get_configuration_table(&efi_guid_fdt))
- return EFI_SUCCESS;
/* Check if there is a hardware device tree */
fdt_opt = env_get("fdt_addr");
/* Use our own device tree as fallback */
@@ -680,3 +688,44 @@ out:
return ret;
}
+
+/**
+ * pmem_node_efi_memmap_setup() - Add pmem node and tweak EFI memmap
+ * @fdt: The devicetree to which pmem node is added
+ * @addr: start address of the pmem node
+ * @size: size of the memory of the pmem node
+ *
+ * The function adds the pmem node to the device-tree along with removing
+ * the corresponding region from the EFI memory map. Used primarily to
+ * pass the information of a RAM based ISO image to the OS.
+ *
+ * Return: 0 on success, -ve value on error
+ */
+static int pmem_node_efi_memmap_setup(void *fdt, u64 addr, u64 size)
+{
+ int ret;
+ u64 pages;
+ efi_status_t status;
+
+ ret = fdt_fixup_pmem_region(fdt, addr, size);
+ if (ret) {
+ log_err("Failed to setup pmem node for addr %#llx, size %#llx, err %d\n",
+ addr, size, ret);
+ return ret;
+ }
+
+ /* Remove the pmem region from the EFI memory map */
+ pages = efi_size_in_pages(size + (addr & EFI_PAGE_MASK));
+ status = efi_update_memory_map(addr, pages, EFI_CONVENTIONAL_MEMORY,
+ false, true);
+ if (status != EFI_SUCCESS)
+ return -1;
+
+ return 0;
+}
+
+int fdt_efi_pmem_setup(void *fdt)
+{
+ return blkmap_get_preserved_pmem_slices(pmem_node_efi_memmap_setup,
+ fdt);
+}
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index 6d00b186250..0abb1f6159a 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -258,7 +258,7 @@ static s64 efi_mem_carve_out(struct efi_mem_list *map,
}
/**
- * efi_add_memory_map_pg() - add pages to the memory map
+ * efi_update_memory_map() - update the memory map by adding/removing pages
*
* @start: start address, must be a multiple of
* EFI_PAGE_SIZE
@@ -266,12 +266,11 @@ static s64 efi_mem_carve_out(struct efi_mem_list *map,
* @memory_type: type of memory added
* @overlap_conventional: region may only overlap free(conventional)
* memory
+ * @remove: remove memory map
* Return: status code
*/
-static
-efi_status_t efi_add_memory_map_pg(u64 start, u64 pages,
- int memory_type,
- bool overlap_conventional)
+efi_status_t efi_update_memory_map(u64 start, u64 pages, int memory_type,
+ bool overlap_conventional, bool remove)
{
struct efi_mem_list *lmem;
struct efi_mem_list *newlist;
@@ -279,9 +278,9 @@ efi_status_t efi_add_memory_map_pg(u64 start, u64 pages,
uint64_t carved_pages = 0;
struct efi_event *evt;
- EFI_PRINT("%s: 0x%llx 0x%llx %d %s\n", __func__,
+ EFI_PRINT("%s: 0x%llx 0x%llx %d %s %s\n", __func__,
start, pages, memory_type, overlap_conventional ?
- "yes" : "no");
+ "yes" : "no", remove ? "remove" : "add");
if (memory_type >= EFI_MAX_MEMORY_TYPE)
return EFI_INVALID_PARAMETER;
@@ -364,7 +363,10 @@ efi_status_t efi_add_memory_map_pg(u64 start, u64 pages,
}
/* Add our new map */
- list_add_tail(&newlist->link, &efi_mem);
+ if (!remove)
+ list_add_tail(&newlist->link, &efi_mem);
+ else
+ free(newlist);
/* And make sure memory is listed in descending order */
efi_mem_sort();
@@ -401,7 +403,7 @@ efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type)
pages = efi_size_in_pages(size + (start & EFI_PAGE_MASK));
start &= ~EFI_PAGE_MASK;
- return efi_add_memory_map_pg(start, pages, memory_type, false);
+ return efi_update_memory_map(start, pages, memory_type, false, false);
}
/**
@@ -491,8 +493,7 @@ efi_status_t efi_allocate_pages(enum efi_allocate_type type,
return EFI_NOT_FOUND;
addr = map_to_sysmem((void *)(uintptr_t)*memory);
- addr = (u64)lmb_alloc_addr(addr, len, flags);
- if (!addr)
+ if (lmb_alloc_addr(addr, len, flags))
return EFI_NOT_FOUND;
break;
default:
@@ -502,7 +503,7 @@ efi_status_t efi_allocate_pages(enum efi_allocate_type type,
efi_addr = (u64)(uintptr_t)map_sysmem(addr, 0);
/* Reserve that map in our memory maps */
- ret = efi_add_memory_map_pg(efi_addr, pages, memory_type, true);
+ ret = efi_update_memory_map(efi_addr, pages, memory_type, true, false);
if (ret != EFI_SUCCESS) {
/* Map would overlap, bail out */
lmb_free_flags(addr, (u64)pages << EFI_PAGE_SHIFT, flags);
@@ -823,8 +824,8 @@ static void add_u_boot_and_runtime(void)
uboot_stack_size) & ~EFI_PAGE_MASK;
uboot_pages = ((uintptr_t)map_sysmem(gd->ram_top - 1, 0) -
uboot_start + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
- efi_add_memory_map_pg(uboot_start, uboot_pages, EFI_BOOT_SERVICES_CODE,
- false);
+ efi_update_memory_map(uboot_start, uboot_pages, EFI_BOOT_SERVICES_CODE,
+ false, false);
#if defined(__aarch64__)
/*
* Runtime Services must be 64KiB aligned according to the
@@ -842,8 +843,8 @@ static void add_u_boot_and_runtime(void)
runtime_end = (uintptr_t)__efi_runtime_stop;
runtime_end = (runtime_end + runtime_mask) & ~runtime_mask;
runtime_pages = (runtime_end - runtime_start) >> EFI_PAGE_SHIFT;
- efi_add_memory_map_pg(runtime_start, runtime_pages,
- EFI_RUNTIME_SERVICES_CODE, false);
+ efi_update_memory_map(runtime_start, runtime_pages,
+ EFI_RUNTIME_SERVICES_CODE, false, false);
}
int efi_memory_init(void)
@@ -878,11 +879,11 @@ int efi_map_update_notify(phys_addr_t addr, phys_size_t size,
pages = efi_size_in_pages(size + (efi_addr & EFI_PAGE_MASK));
efi_addr &= ~EFI_PAGE_MASK;
- status = efi_add_memory_map_pg(efi_addr, pages,
+ status = efi_update_memory_map(efi_addr, pages,
op == LMB_MAP_OP_RESERVE ?
EFI_BOOT_SERVICES_DATA :
EFI_CONVENTIONAL_MEMORY,
- false);
+ false, false);
if (status != EFI_SUCCESS) {
log_err("LMB Map notify failure %lu\n",
status & ~EFI_ERROR_MASK);
diff --git a/lib/efi_loader/elf_efi.ldsi b/lib/efi_loader/elf_efi.ldsi
index 190a88fb69e..4fa5ca43872 100644
--- a/lib/efi_loader/elf_efi.ldsi
+++ b/lib/efi_loader/elf_efi.ldsi
@@ -21,10 +21,10 @@ SECTIONS
*(.gnu.linkonce.t.*)
*(.srodata)
*(.rodata*)
- . = ALIGN(16);
- *(.dynamic);
- . = ALIGN(512);
}
+ . = ALIGN(16);
+ .dynamic : { *(.dynamic) }
+ . = ALIGN(512);
.rela.dyn : { *(.rela.dyn) }
.rela.plt : { *(.rela.plt) }
.rela.got : { *(.rela.got) }
generated by cgit v1.2.3 (git 2.0.4) at 2025-07-24 12:17:53 +0000