* [PATCH v2 2/2] arm64: add EFI Linux loader
2013-12-19 20:58 [PATCH v2 1/2] fdt: additions required for arm64 Linux loader Leif Lindholm
@ 2013-12-19 20:58 ` Leif Lindholm
0 siblings, 0 replies; 2+ messages in thread
From: Leif Lindholm @ 2013-12-19 20:58 UTC (permalink / raw)
To: grub-devel; +Cc: Leif Lindholm, patches
---
grub-core/Makefile.core.def | 3 +-
grub-core/loader/arm64/linux.c | 479 ++++++++++++++++++++++++++++++++++++++++
include/grub/arm64/linux.h | 54 +++++
include/grub/efi/api.h | 4 +
4 files changed, 539 insertions(+), 1 deletion(-)
create mode 100644 grub-core/loader/arm64/linux.c
create mode 100644 include/grub/arm64/linux.h
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index e5e558c..c916246 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -1672,7 +1672,8 @@ module = {
sparc64_ieee1275 = loader/sparc64/ieee1275/linux.c;
ia64_efi = loader/ia64/efi/linux.c;
arm = loader/arm/linux.c;
- arm = lib/fdt.c;
+ arm64 = loader/arm64/linux.c;
+ fdt = lib/fdt.c;
common = loader/linux.c;
common = lib/cmdline.c;
enable = noemu;
diff --git a/grub-core/loader/arm64/linux.c b/grub-core/loader/arm64/linux.c
new file mode 100644
index 0000000..e410179
--- /dev/null
+++ b/grub-core/loader/arm64/linux.c
@@ -0,0 +1,479 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2013 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/command.h>
+#include <grub/err.h>
+#include <grub/file.h>
+#include <grub/fdt.h>
+#include <grub/linux.h>
+#include <grub/loader.h>
+#include <grub/mm.h>
+#include <grub/types.h>
+#include <grub/cpu/linux.h>
+#include <grub/efi/efi.h>
+#include <grub/efi/pe32.h>
+#include <grub/i18n.h>
+#include <grub/lib/cmdline.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#define GRUB_EFI_PAGE_SHIFT 12
+#define BYTES_TO_PAGES(bytes) (((bytes) + 0xfff) >> GRUB_EFI_PAGE_SHIFT)
+#define GRUB_EFI_PE_MAGIC 0x5A4D
+
+static grub_efi_guid_t fdt_guid = GRUB_EFI_DEVICE_TREE_GUID;
+
+typedef void (*kernel_stub) (grub_efi_handle_t, grub_efi_system_table_t *);
+typedef void (*kernel_image) (void *);
+
+static grub_dl_t my_mod;
+static int loaded;
+
+static void *kernel_addr;
+static grub_uint64_t kernel_size;
+
+static char *linux_args;
+static grub_uint32_t cmdline_size;
+
+static grub_addr_t initrd_start;
+static grub_addr_t initrd_end;
+
+static void *loaded_fdt;
+static void *fdt;
+
+static void *
+get_firmware_fdt (void)
+{
+ grub_efi_configuration_table_t *tables;
+ void *firmware_fdt = NULL;
+ unsigned int i;
+
+ /* Look for FDT in UEFI config tables. */
+ tables = grub_efi_system_table->configuration_table;
+
+ for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
+ if (grub_memcmp (&tables[i].vendor_guid, &fdt_guid, sizeof (fdt_guid)) == 0)
+ {
+ firmware_fdt = tables[i].vendor_table;
+ grub_dprintf ("linux", "found registered FDT @ 0x%p\n", firmware_fdt);
+ break;
+ }
+
+ return firmware_fdt;
+}
+
+static void
+get_fdt (void)
+{
+ int size;
+
+ if (fdt)
+ {
+ size = BYTES_TO_PAGES (grub_fdt_get_totalsize (fdt));
+ grub_efi_free_pages ((grub_efi_physical_address_t) fdt, size);
+ }
+
+ if (!loaded_fdt)
+ loaded_fdt = get_firmware_fdt();
+
+ size =
+ loaded_fdt ? grub_fdt_get_totalsize (loaded_fdt) : GRUB_FDT_EMPTY_TREE_SZ;
+ size += 0x400;
+
+ grub_dprintf ("linux", "allocating %d bytes for fdt\n", size);
+ fdt = grub_efi_allocate_pages (0, BYTES_TO_PAGES (size));
+ if (!fdt)
+ return;
+
+ if (loaded_fdt)
+ {
+ grub_memmove (fdt, loaded_fdt, size);
+ grub_fdt_set_totalsize (fdt, size);
+ }
+ else
+ {
+ grub_fdt_create_empty_tree (fdt, size);
+ }
+}
+
+static grub_err_t
+check_kernel (struct linux_kernel_header *lh)
+{
+ if (lh->magic != GRUB_LINUX_MAGIC)
+ return grub_error(GRUB_ERR_BAD_OS, N_("Invalid kernel image"));
+
+ if ((lh->code0 & 0xffff) != GRUB_EFI_PE_MAGIC)
+ return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+ N_("Plain Image kernel not supported - rebuild with CONFIG_UEFI_STUB enabled.\n"));
+
+ grub_dprintf ("linux", "UEFI stub kernel:\n");
+ grub_dprintf ("linux", "text_offset = 0x%012llx\n",
+ (long long unsigned) lh->text_offset);
+ grub_dprintf ("linux", "PE/COFF header @ %08x\n", lh->hdr_offset);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+finalize_params (void)
+{
+ grub_efi_boot_services_t *b;
+ grub_efi_status_t status;
+ int node, retval;
+
+ get_fdt ();
+ if (!fdt)
+ goto failure;
+
+ node = grub_fdt_find_subnode (fdt, 0, "chosen");
+ if (node < 0)
+ node = grub_fdt_add_subnode (fdt, 0, "chosen");
+
+ if (node < 1)
+ goto failure;
+
+ /* Set initrd info */
+ if (initrd_start && initrd_end > initrd_start)
+ {
+ grub_dprintf ("linux", "Initrd @ 0x%012lx-0x%012lx\n",
+ initrd_start, initrd_end);
+
+ retval = grub_fdt_set_prop64 (fdt, node, "linux,initrd-start",
+ initrd_start);
+ if (retval)
+ goto failure;
+ retval = grub_fdt_set_prop64 (fdt, node, "linux,initrd-end",
+ initrd_end);
+ if (retval)
+ goto failure;
+ }
+
+ b = grub_efi_system_table->boot_services;
+ status = b->install_configuration_table (&fdt_guid, fdt);
+ if (status != GRUB_EFI_SUCCESS)
+ goto failure;
+
+ grub_dprintf ("linux", "Installed/updated FDT configuration table @ %p\n",
+ fdt);
+
+ return GRUB_ERR_NONE;
+
+failure:
+ grub_efi_free_pages ((grub_efi_physical_address_t) fdt,
+ BYTES_TO_PAGES (grub_fdt_get_totalsize (fdt)));
+ fdt = NULL;
+ return GRUB_ERR_BAD_OS;
+}
+
+static grub_err_t
+grub_cmd_devicetree (grub_command_t cmd __attribute__ ((unused)),
+ int argc, char *argv[])
+{
+ grub_file_t dtb;
+ void *blob = NULL;
+ int size;
+
+ if (!loaded)
+ {
+ grub_error (GRUB_ERR_BAD_ARGUMENT,
+ N_("you need to load the kernel first"));
+ return GRUB_ERR_BAD_OS;
+ }
+
+ if (argc != 1)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+
+ if (loaded_fdt)
+ grub_free (loaded_fdt);
+ loaded_fdt = NULL;
+
+ dtb = grub_file_open (argv[0]);
+ if (!dtb)
+ goto out;
+
+ size = grub_file_size (dtb);
+ blob = grub_malloc (size);
+ if (!blob)
+ goto out;
+
+ if (grub_file_read (dtb, blob, size) < size)
+ {
+ if (!grub_errno)
+ grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), argv[0]);
+ goto out;
+ }
+
+ if (grub_fdt_check_header (blob, size) != 0)
+ {
+ grub_error (GRUB_ERR_BAD_OS, N_("Invalid FDT"));
+ goto out;
+ }
+
+out:
+ if (dtb)
+ grub_file_close (dtb);
+
+ if (blob)
+ {
+ if (grub_errno == GRUB_ERR_NONE)
+ loaded_fdt = blob;
+ else
+ grub_free (blob);
+ }
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_linux_boot (void)
+{
+ grub_efi_memory_mapped_device_path_t *mempath;
+ grub_efi_handle_t image_handle;
+ grub_efi_boot_services_t *b;
+ grub_efi_status_t status;
+ grub_err_t retval;
+ grub_efi_loaded_image_t *loaded_image;
+ grub_efi_char16_t *p16;
+ char *p8;
+
+ retval = finalize_params();
+ if (retval != GRUB_ERR_NONE)
+ return retval;
+
+ mempath = grub_malloc (2 * sizeof (grub_efi_memory_mapped_device_path_t));
+ if (!mempath)
+ return GRUB_ERR_OUT_OF_MEMORY;
+
+ mempath[0].header.type = GRUB_EFI_HARDWARE_DEVICE_PATH_TYPE;
+ mempath[0].header.subtype = GRUB_EFI_MEMORY_MAPPED_DEVICE_PATH_SUBTYPE;
+ mempath[0].header.length = grub_cpu_to_le16_compile_time (sizeof (*mempath));
+ mempath[0].memory_type = GRUB_EFI_LOADER_DATA;
+ mempath[0].start_address = (grub_addr_t) kernel_addr;
+ mempath[0].end_address = (grub_addr_t) kernel_addr + kernel_size;
+
+ mempath[1].header.type = GRUB_EFI_END_DEVICE_PATH_TYPE;
+ mempath[1].header.subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
+ mempath[1].header.length = 0;
+
+ b = grub_efi_system_table->boot_services;
+ status = b->load_image (0, grub_efi_image_handle,
+ (grub_efi_device_path_t *) mempath,
+ kernel_addr, kernel_size, &image_handle);
+ if (status != GRUB_EFI_SUCCESS)
+ return GRUB_ERR_BAD_OS;
+
+ grub_dprintf ("linux", "linux command line: '%s'\n", linux_args);
+
+ /* Convert command line to UCS-2 */
+ loaded_image = grub_efi_get_loaded_image (image_handle);
+ loaded_image->load_options_size =
+ grub_strlen (linux_args) * sizeof (grub_efi_char16_t);
+ loaded_image->load_options = p16 =
+ grub_efi_allocate_pages (0,
+ BYTES_TO_PAGES (loaded_image->load_options_size));
+ if (!loaded_image->load_options)
+ return GRUB_ERR_OUT_OF_MEMORY;
+
+ p8 = linux_args;
+ do
+ *p16++ = *p8++;
+ while (*p8);
+
+ grub_dprintf("linux", "starting image %p\n", image_handle);
+ status = b->start_image (image_handle, 0, NULL);
+
+ /* When successful, not reached */
+ return grub_errno;
+}
+
+static grub_err_t
+grub_linux_unload (void)
+{
+ grub_dl_unref (my_mod);
+ loaded = 0;
+ if (initrd_start)
+ grub_efi_free_pages ((grub_efi_physical_address_t) initrd_start,
+ BYTES_TO_PAGES (initrd_end - initrd_start));
+ initrd_start = initrd_end = 0;
+ grub_free (linux_args);
+ if (kernel_addr)
+ grub_efi_free_pages ((grub_efi_physical_address_t) kernel_addr,
+ BYTES_TO_PAGES (kernel_size));
+ if (fdt)
+ grub_efi_free_pages ((grub_efi_physical_address_t) fdt,
+ BYTES_TO_PAGES (grub_fdt_get_totalsize (fdt)));
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
+ int argc, char *argv[])
+{
+ struct grub_linux_initrd_context initrd_ctx;
+ int initrd_size, initrd_pages;
+ void *initrd_mem = NULL;
+
+ if (argc == 0)
+ {
+ grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+ goto fail;
+ }
+
+ if (!loaded)
+ {
+ grub_error (GRUB_ERR_BAD_ARGUMENT,
+ N_("you need to load the kernel first"));
+ goto fail;
+ }
+
+ if (grub_initrd_init (argc, argv, &initrd_ctx))
+ goto fail;
+
+ initrd_size = grub_get_initrd_size (&initrd_ctx);
+ grub_dprintf ("linux", "Loading initrd\n");
+
+ initrd_pages = (BYTES_TO_PAGES (initrd_size));
+ initrd_mem = grub_efi_allocate_pages (0, initrd_pages);
+ if (!initrd_mem)
+ {
+ grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate pages");
+ goto fail;
+ }
+
+ if (grub_initrd_load (&initrd_ctx, argv, initrd_mem))
+ goto fail;
+
+ initrd_start = (grub_addr_t) initrd_mem;
+ initrd_end = initrd_start + initrd_size;
+ grub_dprintf ("linux", "[addr=%p, size=0x%x]\n",
+ (void *) initrd_start, initrd_size);
+
+ fail:
+ grub_initrd_close (&initrd_ctx);
+ if (initrd_mem && !initrd_start)
+ grub_efi_free_pages ((grub_efi_physical_address_t) initrd_mem,
+ initrd_pages);
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
+ int argc, char *argv[])
+{
+ grub_file_t file = 0;
+ struct linux_kernel_header lh;
+
+ grub_dl_ref (my_mod);
+
+ if (argc == 0)
+ {
+ grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+ goto fail;
+ }
+
+ file = grub_file_open (argv[0]);
+ if (!file)
+ goto fail;
+
+ kernel_size = grub_file_size (file);
+
+ if (grub_file_read (file, &lh, sizeof (lh)) < (long) sizeof (lh))
+ return GRUB_ERR_FILE_READ_ERROR;
+
+ if (check_kernel (&lh) != GRUB_ERR_NONE)
+ goto fail;
+
+ grub_dprintf ("linux", "kernel file size: %lld\n", (long long) kernel_size);
+ kernel_addr = grub_efi_allocate_pages (0, BYTES_TO_PAGES (kernel_size));
+ grub_dprintf ("linux", "kernel numpages: %lld\n",
+ (long long) BYTES_TO_PAGES (kernel_size));
+ if (!kernel_addr)
+ {
+ grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("can't allocate kernel"));
+ goto fail;
+ }
+
+ grub_file_seek (file, 0);
+ if (grub_file_read (file, kernel_addr, kernel_size)
+ < (grub_int64_t) kernel_size)
+ {
+ if (!grub_errno)
+ grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), argv[0]);
+ goto fail;
+ }
+
+ grub_dprintf ("linux", "kernel @ %p\n", kernel_addr);
+
+ cmdline_size = grub_loader_cmdline_size (argc, argv) + sizeof (LINUX_IMAGE);
+ linux_args = grub_malloc (cmdline_size);
+ if (!linux_args)
+ grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate command line");
+ grub_memcpy (linux_args, LINUX_IMAGE, sizeof (LINUX_IMAGE));
+ grub_create_loader_cmdline (argc, argv,
+ linux_args + sizeof (LINUX_IMAGE) - 1,
+ cmdline_size);
+
+ if (grub_errno == GRUB_ERR_NONE)
+ {
+ grub_loader_set (grub_linux_boot, grub_linux_unload, 0);
+ loaded = 1;
+ }
+
+fail:
+ if (file)
+ grub_file_close (file);
+
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_dl_unref (my_mod);
+ loaded = 0;
+ }
+
+ if (linux_args && !loaded)
+ grub_free (linux_args);
+
+ if (kernel_addr && !loaded)
+ grub_efi_free_pages ((grub_efi_physical_address_t) kernel_addr,
+ BYTES_TO_PAGES (kernel_size));
+
+ return grub_errno;
+}
+
+
+static grub_command_t cmd_linux, cmd_initrd, cmd_devicetree;
+
+GRUB_MOD_INIT (linux)
+{
+ cmd_linux = grub_register_command ("linux", grub_cmd_linux, 0,
+ N_("Load Linux."));
+ cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd, 0,
+ N_("Load initrd."));
+ cmd_devicetree =
+ grub_register_command ("devicetree", grub_cmd_devicetree, 0,
+ N_("Load DTB file."));
+ my_mod = mod;
+}
+
+GRUB_MOD_FINI (linux)
+{
+ grub_unregister_command (cmd_linux);
+ grub_unregister_command (cmd_initrd);
+ grub_unregister_command (cmd_devicetree);
+}
diff --git a/include/grub/arm64/linux.h b/include/grub/arm64/linux.h
new file mode 100644
index 0000000..53e60c6
--- /dev/null
+++ b/include/grub/arm64/linux.h
@@ -0,0 +1,54 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2013 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_LINUX_CPU_HEADER
+#define GRUB_LINUX_CPU_HEADER 1
+
+#include <grub/efi/efi.h>
+
+#define GRUB_EFI_KERNEL_STUB_ENTRY_OFFSET 0
+#define GRUB_LINUX_MAX_LOAD_ADDR 0xffffffffffffULL
+
+#define GRUB_LINUX_MAGIC 0x644d5241 /* 'ARM\x64' */
+
+/* From linux/Documentation/arm64/booting.txt */
+struct linux_kernel_header
+{
+ grub_uint32_t code0; /* Executable code */
+ grub_uint32_t code1; /* Executable code */
+ grub_uint64_t text_offset; /* Image load offset */
+ grub_uint64_t res0; /* reserved */
+ grub_uint64_t res1; /* reserved */
+ grub_uint64_t res2; /* reserved */
+ grub_uint64_t res3; /* reserved */
+ grub_uint64_t res4; /* reserved */
+ grub_uint32_t magic; /* Magic number, little endian, "ARM\x64" */
+ grub_uint32_t hdr_offset; /* Offset of PE/COFF header */
+};
+
+#define grub_linux_get_params() NULL
+extern grub_err_t grub_linux_init_params (void);
+extern grub_err_t grub_linux_finalize_params (void);
+extern grub_err_t grub_linux_register_kernel (struct linux_kernel_header *lh);
+extern grub_err_t grub_linux_register_cmdline (void * addr);
+extern grub_err_t grub_linux_register_initrd (void * addr, grub_size_t size);
+
+extern void grub_efi_linux_arch_register_commands (void);
+extern void grub_efi_linux_arch_unregister_commands (void);
+
+#endif /* ! GRUB_LINUX_CPU_HEADER */
diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
index 5ebdd9f..a0dfec7 100644
--- a/include/grub/efi/api.h
+++ b/include/grub/efi/api.h
@@ -276,6 +276,10 @@
{ 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 } \
}
+#define GRUB_EFI_DEVICE_TREE_GUID \
+ { 0xb1b621d5, 0xf19c, 0x41a5, \
+ { 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0 } \
+ }
struct grub_efi_sal_system_table
{
grub_uint32_t signature;
--
1.7.10.4
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