Page MenuHomeFreeBSD
Files F160428298

D57806.id180506.diff
No OneTemporary
Actions

D57806.id180506.diff
View Options

diff --git a/stand/efi/include/efilib.h b/stand/efi/include/efilib.h
--- a/stand/efi/include/efilib.h
+++ b/stand/efi/include/efilib.h
@@ -68,6 +68,7 @@
pdinfo_t *efiblk_get_pdinfo(struct devdesc *dev);
pdinfo_t *efiblk_get_pdinfo_by_handle(EFI_HANDLE h);
pdinfo_t *efiblk_get_pdinfo_by_device_path(EFI_DEVICE_PATH *path);
+void efiblk_memdisk_preload(void);
/* libefi.c */
void *efi_get_table(EFI_GUID *tbl);
diff --git a/stand/efi/libefi/efipart.c b/stand/efi/libefi/efipart.c
--- a/stand/efi/libefi/efipart.c
+++ b/stand/efi/libefi/efipart.c
@@ -1250,3 +1250,47 @@
free(blkbuf);
return (rc);
}
+
+/*
+ * Predicate: is this a VirtualDisk as far as UEFI is concerned?
+ */
+static bool
+testmd(pdinfo_t *hd, pdinfo_t *data __unused)
+{
+ EFI_DEVICE_PATH *node;
+
+ node = efi_devpath_last_node(hd->pd_devpath);
+ if (node == NULL)
+ return (false);
+ if (DevicePathType(node) == MEDIA_DEVICE_PATH &&
+ DevicePathSubType(node) == MEDIA_RAM_DISK_DP)
+ return (true);
+
+ return (false);
+}
+
+/*
+ * Passes all the VirtualDisk instances to FreeBSD as a preloaded memory disk.
+ */
+void
+efiblk_memdisk_preload(void)
+{
+ MEDIA_RAM_DISK_DEVICE_PATH *ram;
+ uint64_t start, end;
+ pdinfo_t *md;
+ char key[32], value[32];
+ int i;
+
+ while ((md = efipart_get_pd(&pdinfo, testmd, NULL)) != NULL) {
+ ram = (MEDIA_RAM_DISK_DEVICE_PATH *)efi_devpath_last_node(md->pd_devpath);
+ i = ram->Instance;
+ start = ((uint64_t)ram->StartingAddr[1] << 32) | ram->StartingAddr[0];
+ end = ((uint64_t)ram->EndingAddr[1] << 32) | ram->EndingAddr[0];
+ snprintf(key, sizeof(key), "hint.md.%d.physaddr", i);
+ snprintf(value, sizeof(value), "0x%016x", start);
+ setenv(key, value, 1);
+ snprintf(key, sizeof(key), "hint.md.%d.len", i);
+ snprintf(value, sizeof(value), "0x%016x", end - start);
+ setenv(key, value, 1);
+ }
+}

File Metadata

Mime Type
text/plain
Expires
Thu, Jun 25, 8:13 AM (19 h, 52 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
34316547
Default Alt Text
D57806.id180506.diff (1 KB)

Event Timeline