From fcbb723d4b1f7ad4687191562621dd0eb25f4d9e Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Mon, 8 May 2017 21:19:59 +0200
Subject: [PATCH 020/198] Add support for device-tree-based drivers.
---
conf/Makefile.common | 4 +-
grub-core/Makefile.am | 10 ++
grub-core/Makefile.core.def | 2 +
grub-core/bus/fdt.c | 255 +++++++++++++++++++++++++++++++++++++
grub-core/kern/arm/coreboot/init.c | 20 +++
grub-core/lib/fdt.c | 142 +++++++++++++++------
include/grub/fdt.h | 23 ++--
include/grub/fdtbus.h | 73 +++++++++++
include/grub/kernel.h | 3 +-
include/grub/util/install.h | 2 +-
util/grub-install-common.c | 2 +-
util/grub-mkimage.c | 11 +-
util/mkimage.c | 24 +++-
13 files changed, 519 insertions(+), 52 deletions(-)
create mode 100644 grub-core/bus/fdt.c
create mode 100644 include/grub/fdtbus.h
diff --git a/conf/Makefile.common b/conf/Makefile.common
index 11296b550..311da61c6 100644
--- a/conf/Makefile.common
+++ b/conf/Makefile.common
@@ -86,9 +86,11 @@ CPPFLAGS_TERMINAL_LIST += '-Dgrub_term_register_output(...)=OUTPUT_TERMINAL_LIST
CPPFLAGS_COMMAND_LIST = '-Dgrub_register_command(...)=COMMAND_LIST_MARKER(__VA_ARGS__)'
CPPFLAGS_COMMAND_LIST += '-Dgrub_register_extcmd(...)=EXTCOMMAND_LIST_MARKER(__VA_ARGS__)'
CPPFLAGS_COMMAND_LIST += '-Dgrub_register_command_p1(...)=P1COMMAND_LIST_MARKER(__VA_ARGS__)'
+CPPFLAGS_FDT_LIST := '-Dgrub_fdtbus_register(...)=FDT_DRIVER_LIST_MARKER(__VA_ARGS__)'
CPPFLAGS_MARKER = $(CPPFLAGS_FS_LIST) $(CPPFLAGS_VIDEO_LIST) \
$(CPPFLAGS_PARTTOOL_LIST) $(CPPFLAGS_PARTMAP_LIST) \
- $(CPPFLAGS_TERMINAL_LIST) $(CPPFLAGS_COMMAND_LIST)
+ $(CPPFLAGS_TERMINAL_LIST) $(CPPFLAGS_COMMAND_LIST) \
+ $(CPPFLAGS_FDT_LIST)
# Define these variables to calm down automake
diff --git a/grub-core/Makefile.am b/grub-core/Makefile.am
index bec058554..fc6ca3051 100644
--- a/grub-core/Makefile.am
+++ b/grub-core/Makefile.am
@@ -368,6 +368,16 @@ terminal.lst: $(MARKER_FILES)
platform_DATA += terminal.lst
CLEANFILES += terminal.lst
+fdt.lst: $(MARKER_FILES)
+ (for pp in $^; do \
+ b=`basename $$pp .marker`; \
+ sed -n \
+ -e "/FDT_DRIVER_LIST_MARKER *( *\"/{s/.*( *\"\([^\"]*\)\".*/i\1: $$b/;p;}" \
+ -e "/FDT_DRIVER_LIST_MARKER *( *\"/{s/.*( *\"\([^\"]*\)\".*/o\1: $$b/;p;}" $$pp; \
+ done) | sort -u > $@
+platform_DATA += fdt.lst
+CLEANFILES += fdt.lst
+
parttool.lst: $(MARKER_FILES)
(for pp in $^; do \
b=`basename $$pp .marker`; \
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 411dca46b..77d0b019e 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -158,6 +158,8 @@ kernel = {
arm_coreboot = kern/arm/coreboot/init.c;
arm_coreboot = kern/arm/coreboot/timer.c;
arm_coreboot = kern/arm/coreboot/coreboot.S;
+ arm_coreboot = lib/fdt.c;
+ arm_coreboot = bus/fdt.c;
terminfoinkernel = term/terminfo.c;
terminfoinkernel = term/tparm.c;
diff --git a/grub-core/bus/fdt.c b/grub-core/bus/fdt.c
new file mode 100644
index 000000000..6fb077000
--- /dev/null
+++ b/grub-core/bus/fdt.c
@@ -0,0 +1,255 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2016 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/fdtbus.h>
+#include <grub/fdt.h>
+#include <grub/term.h>
+
+static const void *dtb;
+static grub_size_t root_address_cells, root_size_cells;
+/* Pointer to this symbol signals invalid mapping. */
+char grub_fdtbus_invalid_mapping[1];
+
+struct grub_fdtbus_dev
+{
+ struct grub_fdtbus_dev *next;
+ struct grub_fdtbus_dev *parent;
+ int node;
+ struct grub_fdtbus_driver *driver;
+};
+
+struct grub_fdtbus_dev *devs;
+struct grub_fdtbus_driver *drivers;
+
+static int
+is_compatible (struct grub_fdtbus_driver *driver,
+ int node)
+{
+ grub_size_t compatible_size;
+ const char *compatible = grub_fdt_get_prop (dtb, node, "compatible",
+ &compatible_size);
+ const char *compatible_end = compatible + compatible_size;
+ while (compatible < compatible_end)
+ {
+ if (grub_strcmp (driver->compatible, compatible) == 0)
+ return 1;
+ compatible += grub_strlen (compatible) + 1;
+ }
+ return 0;
+}
+
+static void
+fdtbus_scan (struct grub_fdtbus_dev *parent)
+{
+ int node;
+ for (node = grub_fdt_first_node (dtb, parent ? parent->node : 0); node >= 0;
+ node = grub_fdt_next_node (dtb, node))
+ {
+ struct grub_fdtbus_dev *dev;
+ struct grub_fdtbus_driver *driver;
+ dev = grub_zalloc (sizeof (*dev));
+ if (!dev)
+ {
+ grub_print_error ();
+ return;
+ }
+ dev->node = node;
+ dev->next = devs;
+ dev->parent = parent;
+ devs = dev;
+ FOR_LIST_ELEMENTS(driver, drivers)
+ if (!dev->driver && is_compatible (driver, node))
+ {
+ if (driver->attach(dev) == GRUB_ERR_NONE)
+ {
+ dev->driver = driver;
+ break;
+ }
+ grub_print_error ();
+ }
+ fdtbus_scan (dev);
+ }
+}
+
+void
+grub_fdtbus_register (struct grub_fdtbus_driver *driver)
+{
+ struct grub_fdtbus_dev *dev;
+ grub_list_push (GRUB_AS_LIST_P (&drivers),
+ GRUB_AS_LIST (driver));
+ for (dev = devs; dev; dev = dev->next)
+ if (!dev->driver && is_compatible (driver, dev->node))
+ {
+ if (driver->attach(dev) == GRUB_ERR_NONE)
+ dev->driver = driver;
+ grub_print_error ();
+ }
+}
+
+void
+grub_fdtbus_unregister (struct grub_fdtbus_driver *driver)
+{
+ grub_list_remove (GRUB_AS_LIST (driver));
+ struct grub_fdtbus_dev *dev;
+ for (dev = devs; dev; dev = dev->next)
+ if (dev->driver == driver)
+ {
+ if (driver->detach)
+ driver->detach(dev);
+ dev->driver = 0;
+ }
+}
+
+void
+grub_fdtbus_init (const void *dtb_in, grub_size_t size)
+{
+ if (!dtb_in || grub_fdt_check_header (dtb_in, size) < 0)
+ grub_fatal ("invalid FDT");
+ dtb = dtb_in;
+ const grub_uint32_t *prop = grub_fdt_get_prop (dtb, 0, "#address-cells", 0);
+ if (prop)
+ root_address_cells = grub_be_to_cpu32 (*prop);
+ else
+ root_address_cells = 1;
+
+ prop = grub_fdt_get_prop (dtb, 0, "#size-cells", 0);
+ if (prop)
+ root_size_cells = grub_be_to_cpu32 (*prop);
+ else
+ root_size_cells = 1;
+
+ fdtbus_scan (0);
+}
+
+static int
+get_address_cells (const struct grub_fdtbus_dev *dev)
+{
+ const grub_uint32_t *prop;
+ if (!dev)
+ return root_address_cells;
+ prop = grub_fdt_get_prop (dtb, dev->node, "#address-cells", 0);
+ if (prop)
+ return grub_be_to_cpu32 (*prop);
+ return 1;
+}
+
+static int
+get_size_cells (const struct grub_fdtbus_dev *dev)
+{
+ const grub_uint32_t *prop;
+ if (!dev)
+ return root_size_cells;
+ prop = grub_fdt_get_prop (dtb, dev->node, "#size-cells", 0);
+ if (prop)
+ return grub_be_to_cpu32 (*prop);
+ return 1;
+}
+
+static grub_uint64_t
+get64 (const grub_uint32_t *reg, grub_size_t cells)
+{
+ grub_uint64_t val = 0;
+ if (cells >= 1)
+ val = grub_be_to_cpu32 (reg[cells - 1]);
+ if (cells >= 2)
+ val |= ((grub_uint64_t) grub_be_to_cpu32 (reg[cells - 2])) << 32;
+ return val;
+}
+
+static volatile void *
+translate (const struct grub_fdtbus_dev *dev, const grub_uint32_t *reg)
+{
+ volatile void *ret;
+ const grub_uint32_t *ranges;
+ grub_size_t ranges_size, cells_per_mapping;
+ grub_size_t parent_address_cells, child_address_cells, child_size_cells;
+ grub_size_t nmappings, i;
+ if (dev == 0)
+ {
+ grub_uint64_t val;
+ val = get64 (reg, root_address_cells);
+ if (sizeof (void *) == 4 && (val >> 32))
+ return grub_fdtbus_invalid_mapping;
+ return (void *) (grub_addr_t) val;
+ }
+ ranges = grub_fdt_get_prop (dtb, dev->node, "ranges", &ranges_size);
+ if (!ranges)
+ return grub_fdtbus_invalid_mapping;
+ if (ranges_size == 0)
+ return translate (dev->parent, reg);
+ parent_address_cells = get_address_cells (dev->parent);
+ child_address_cells = get_address_cells (dev);
+ child_size_cells = get_size_cells (dev);
+ cells_per_mapping = parent_address_cells + child_address_cells + child_size_cells;
+ nmappings = ranges_size / 4 / cells_per_mapping;
+ for (i = 0; i < nmappings; i++)
+ {
+ const grub_uint32_t *child_addr = &ranges[i * cells_per_mapping];
+ const grub_uint32_t *parent_addr = child_addr + child_address_cells;
+ grub_uint64_t child_size = get64 (parent_addr + parent_address_cells, child_size_cells);
+
+ if (child_address_cells > 2 && grub_memcmp (reg, child_addr, (child_address_cells - 2) * 4) != 0)
+ continue;
+ if (get64 (reg, child_address_cells) < get64 (child_addr, child_address_cells))
+ continue;
+
+ grub_uint64_t offset = get64 (reg, child_address_cells) - get64 (child_addr, child_address_cells);
+ if (offset >= child_size)
+ continue;
+
+ ret = translate (dev->parent, parent_addr);
+ if (grub_fdtbus_is_mapping_valid (ret))
+ ret = (volatile char *) ret + offset;
+ return ret;
+ }
+ return grub_fdtbus_invalid_mapping;
+}
+
+volatile void *
+grub_fdtbus_map_reg (const struct grub_fdtbus_dev *dev, int regno, grub_size_t *size)
+{
+ grub_size_t address_cells, size_cells;
+ address_cells = get_address_cells (dev->parent);
+ size_cells = get_size_cells (dev->parent);
+ const grub_uint32_t *reg = grub_fdt_get_prop (dtb, dev->node, "reg", 0);
+ if (size && size_cells)
+ *size = reg[(address_cells + size_cells) * regno + address_cells];
+ if (size && !size_cells)
+ *size = 0;
+ return translate (dev->parent, reg + (address_cells + size_cells) * regno);
+}
+
+const char *
+grub_fdtbus_get_name (const struct grub_fdtbus_dev *dev)
+{
+ return grub_fdt_get_nodename (dtb, dev->node);
+}
+
+const void *
+grub_fdtbus_get_prop (const struct grub_fdtbus_dev *dev,
+ const char *name,
+ grub_uint32_t *len)
+{
+ return grub_fdt_get_prop (dtb, dev->node, name, len);
+}
+
+const void *
+grub_fdtbus_get_fdt (void)
+{
+ return dtb;
+}
diff --git a/grub-core/kern/arm/coreboot/init.c b/grub-core/kern/arm/coreboot/init.c
index 51ecaceb0..aec75c672 100644
--- a/grub-core/kern/arm/coreboot/init.c
+++ b/grub-core/kern/arm/coreboot/init.c
@@ -33,6 +33,7 @@
#include <grub/symbol.h>
#include <grub/video.h>
#include <grub/coreboot/lbio.h>
+#include <grub/fdtbus.h>
extern grub_uint8_t _start[];
extern grub_uint8_t _end[];
@@ -99,6 +100,10 @@ heap_init (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
void
grub_machine_init (void)
{
+ struct grub_module_header *header;
+ void *dtb = 0;
+ grub_size_t dtb_size = 0;
+
modend = grub_modules_get_end ();
grub_video_coreboot_fb_early_init ();
@@ -112,6 +117,21 @@ grub_machine_init (void)
grub_font_init ();
grub_gfxterm_init ();
+ FOR_MODULES (header)
+ if (header->type == OBJ_TYPE_DTB)
+ {
+ char *dtb_orig_addr, *dtb_copy;
+ dtb_orig_addr = (char *) header + sizeof (struct grub_module_header);
+
+ dtb_size = header->size - sizeof (struct grub_module_header);
+ dtb = dtb_copy = grub_malloc (dtb_size);
+ grub_memmove (dtb_copy, dtb_orig_addr, dtb_size);
+ break;
+ }
+ if (!dtb)
+ grub_fatal ("No DTB found");
+ grub_fdtbus_init (dtb, dtb_size);
+
grub_machine_timer_init ();
}
diff --git a/grub-core/lib/fdt.c b/grub-core/lib/fdt.c
index b5d520f20..bdc630244 100644
--- a/grub-core/lib/fdt.c
+++ b/grub-core/lib/fdt.c
@@ -102,13 +102,13 @@ static grub_uint32_t *get_next_node (const void *fdt, char *node_name)
static int get_mem_rsvmap_size (const void *fdt)
{
int size = 0;
- grub_uint64_t *ptr = (void *) ((grub_addr_t) fdt
- + grub_fdt_get_off_mem_rsvmap (fdt));
+ grub_unaligned_uint64_t *ptr = (void *) ((grub_addr_t) fdt
+ + grub_fdt_get_off_mem_rsvmap (fdt));
do
{
size += 2 * sizeof(*ptr);
- if (!*ptr && !*(ptr + 1))
+ if (!ptr[0].val && !ptr[1].val)
return size;
ptr += 2;
} while ((grub_addr_t) ptr <= (grub_addr_t) fdt + grub_fdt_get_totalsize (fdt)
@@ -229,7 +229,7 @@ static int rearrange_blocks (void *fdt, unsigned int clearance)
return 0;
}
-static grub_uint32_t *find_prop (void *fdt, unsigned int nodeoffset,
+static grub_uint32_t *find_prop (const void *fdt, unsigned int nodeoffset,
const char *name)
{
grub_uint32_t *prop = (void *) ((grub_addr_t) fdt
@@ -268,9 +268,9 @@ static grub_uint32_t *find_prop (void *fdt, unsigned int nodeoffset,
the size allocated for the FDT; if this function is called before the other
functions in this file and returns success, the other functions are
guaranteed not to access memory locations outside the allocated memory. */
-int grub_fdt_check_header_nosize (void *fdt)
+int grub_fdt_check_header_nosize (const void *fdt)
{
- if (((grub_addr_t) fdt & 0x7) || (grub_fdt_get_magic (fdt) != FDT_MAGIC)
+ if (((grub_addr_t) fdt & 0x3) || (grub_fdt_get_magic (fdt) != FDT_MAGIC)
|| (grub_fdt_get_version (fdt) < FDT_SUPPORTED_VERSION)
|| (grub_fdt_get_last_comp_version (fdt) > FDT_SUPPORTED_VERSION)
|| (grub_fdt_get_off_dt_struct (fdt) & 0x00000003)
@@ -286,7 +286,7 @@ int grub_fdt_check_header_nosize (void *fdt)
return 0;
}
-int grub_fdt_check_header (void *fdt, unsigned int size)
+int grub_fdt_check_header (const void *fdt, unsigned int size)
{
if (size < sizeof (grub_fdt_header_t)
|| (grub_fdt_get_totalsize (fdt) > size)
@@ -295,41 +295,29 @@ int grub_fdt_check_header (void *fdt, unsigned int size)
return 0;
}
-/* Find a direct sub-node of a given parent node. */
-int grub_fdt_find_subnode (const void *fdt, unsigned int parentoffset,
- const char *name)
+static const grub_uint32_t *
+advance_token (const void *fdt, const grub_uint32_t *token, const grub_uint32_t *end, int skip_current)
{
- grub_uint32_t *token, *end;
- char *node_name;
-
- if (parentoffset & 0x3)
- return -1;
- token = (void *) ((grub_addr_t) fdt + grub_fdt_get_off_dt_struct(fdt)
- + parentoffset);
- end = (void *) struct_end (fdt);
- if ((token >= end) || (grub_be_to_cpu32(*token) != FDT_BEGIN_NODE))
- return -1;
- SKIP_NODE_NAME(node_name, token, end);
- while (token < end)
+ for (; token < end; skip_current = 0)
{
- switch (grub_be_to_cpu32(*token))
+ switch (grub_be_to_cpu32 (*token))
{
case FDT_BEGIN_NODE:
- node_name = (char *) (token + 1);
- if (node_name + grub_strlen (name) >= (char *) end)
- return -1;
- if (!grub_strcmp (node_name, name))
- return (int) ((grub_addr_t) token - (grub_addr_t) fdt
- - grub_fdt_get_off_dt_struct (fdt));
- token = get_next_node (fdt, node_name);
- if (!token)
- return -1;
- break;
+ if (skip_current)
+ {
+ token = get_next_node (fdt, (char *) (token + 1));
+ continue;
+ }
+ char *ptr;
+ for (ptr = (char *) (token + 1); *ptr && ptr < (char *) end; ptr++);
+ if (ptr >= (char *) end)
+ return 0;
+ return token;
case FDT_PROP:
/* Skip property token and following data (len, nameoff and property
value). */
if (token >= end - 1)
- return -1;
+ return 0;
token += prop_entry_size(grub_be_to_cpu32(*(token + 1)))
/ sizeof(*token);
break;
@@ -337,10 +325,74 @@ int grub_fdt_find_subnode (const void *fdt, unsigned int parentoffset,
token++;
break;
default:
- return -1;
+ return 0;
}
}
- return -1;
+ return 0;
+}
+
+int grub_fdt_next_node (const void *fdt, unsigned int currentoffset)
+{
+ const grub_uint32_t *token = (const grub_uint32_t *) fdt + (currentoffset + grub_fdt_get_off_dt_struct (fdt)) / 4;
+ token = advance_token (fdt, token, (const void *) struct_end (fdt), 1);
+ if (!token)
+ return -1;
+ return (int) ((grub_addr_t) token - (grub_addr_t) fdt
+ - grub_fdt_get_off_dt_struct (fdt));
+}
+
+int grub_fdt_first_node (const void *fdt, unsigned int parentoffset)
+{
+ const grub_uint32_t *token, *end;
+ char *node_name;
+
+ if (parentoffset & 0x3)
+ return -1;
+ token = (const void *) ((grub_addr_t) fdt + grub_fdt_get_off_dt_struct(fdt)
+ + parentoffset);
+ end = (const void *) struct_end (fdt);
+ if ((token >= end) || (grub_be_to_cpu32(*token) != FDT_BEGIN_NODE))
+ return -1;
+ SKIP_NODE_NAME(node_name, token, end);
+ token = advance_token (fdt, token, end, 0);
+ if (!token)
+ return -1;
+ return (int) ((grub_addr_t) token - (grub_addr_t) fdt
+ - grub_fdt_get_off_dt_struct (fdt));
+}
+
+/* Find a direct sub-node of a given parent node. */
+int grub_fdt_find_subnode (const void *fdt, unsigned int parentoffset,
+ const char *name)
+{
+ const grub_uint32_t *token, *end;
+ const char *node_name;
+ int skip_current = 0;
+
+ if (parentoffset & 0x3)
+ return -1;
+ token = (const void *) ((grub_addr_t) fdt + grub_fdt_get_off_dt_struct(fdt)
+ + parentoffset);
+ end = (const void *) struct_end (fdt);
+ if ((token >= end) || (grub_be_to_cpu32(*token) != FDT_BEGIN_NODE))
+ return -1;
+ SKIP_NODE_NAME(node_name, token, end);
+ while (1) {
+ token = advance_token (fdt, token, end, skip_current);
+ if (!token)
+ return -1;
+ skip_current = 1;
+ node_name = (const char *) token + 4;
+ if (grub_strcmp (node_name, name) == 0)
+ return (int) ((grub_addr_t) token - (grub_addr_t) fdt
+ - grub_fdt_get_off_dt_struct (fdt));
+ }
+}
+
+const char *
+grub_fdt_get_nodename (const void *fdt, unsigned int nodeoffset)
+{
+ return (const char *) fdt + grub_fdt_get_off_dt_struct(fdt) + nodeoffset + 4;
}
int grub_fdt_add_subnode (void *fdt, unsigned int parentoffset,
@@ -359,6 +411,24 @@ int grub_fdt_add_subnode (void *fdt, unsigned int parentoffset,
return add_subnode (fdt, parentoffset, name);
}
+const void *
+grub_fdt_get_prop (const void *fdt, unsigned int nodeoffset, const char *name,
+ grub_uint32_t *len)
+{
+ grub_uint32_t *prop;
+ if ((nodeoffset >= grub_fdt_get_size_dt_struct (fdt)) || (nodeoffset & 0x3)
+ || (grub_be_to_cpu32(*(grub_uint32_t *) ((grub_addr_t) fdt
+ + grub_fdt_get_off_dt_struct (fdt) + nodeoffset))
+ != FDT_BEGIN_NODE))
+ return 0;
+ prop = find_prop (fdt, nodeoffset, name);
+ if (!prop)
+ return 0;
+ if (len)
+ *len = grub_be_to_cpu32 (*(prop + 1));
+ return prop + 3;
+}
+
int grub_fdt_set_prop (void *fdt, unsigned int nodeoffset, const char *name,
const void *val, grub_uint32_t len)
{
diff --git a/include/grub/fdt.h b/include/grub/fdt.h
index fdfca75bf..75525fa31 100644
--- a/include/grub/fdt.h
+++ b/include/grub/fdt.h
@@ -20,6 +20,7 @@
#define GRUB_FDT_HEADER 1
#include <grub/types.h>
+#include <grub/symbol.h>
#define FDT_MAGIC 0xD00DFEED
@@ -95,16 +96,22 @@ struct grub_fdt_empty_tree {
#define grub_fdt_set_size_dt_struct(fdt, value) \
grub_fdt_set_header(fdt, size_dt_struct, value)
-int grub_fdt_create_empty_tree (void *fdt, unsigned int size);
-int grub_fdt_check_header (void *fdt, unsigned int size);
-int grub_fdt_check_header_nosize (void *fdt);
-int grub_fdt_find_subnode (const void *fdt, unsigned int parentoffset,
- const char *name);
-int grub_fdt_add_subnode (void *fdt, unsigned int parentoffset,
+int EXPORT_FUNC(grub_fdt_create_empty_tree) (void *fdt, unsigned int size);
+int EXPORT_FUNC(grub_fdt_check_header) (const void *fdt, unsigned int size);
+int EXPORT_FUNC(grub_fdt_check_header_nosize) (const void *fdt);
+int EXPORT_FUNC(grub_fdt_find_subnode) (const void *fdt, unsigned int parentoffset,
+ const char *name);
+int EXPORT_FUNC(grub_fdt_first_node) (const void *fdt, unsigned int parentoffset);
+int EXPORT_FUNC(grub_fdt_next_node) (const void *fdt, unsigned int currentoffset);
+int EXPORT_FUNC(grub_fdt_add_subnode) (void *fdt, unsigned int parentoffset,
const char *name);
+const char *
+EXPORT_FUNC(grub_fdt_get_nodename) (const void *fdt, unsigned int nodeoffset);
+const void *EXPORT_FUNC(grub_fdt_get_prop) (const void *fdt, unsigned int nodeoffset, const char *name,
+ grub_uint32_t *len);
-int grub_fdt_set_prop (void *fdt, unsigned int nodeoffset, const char *name,
- const void *val, grub_uint32_t len);
+int EXPORT_FUNC(grub_fdt_set_prop) (void *fdt, unsigned int nodeoffset, const char *name,
+ const void *val, grub_uint32_t len);
#define grub_fdt_set_prop32(fdt, nodeoffset, name, val) \
({ \
grub_uint32_t _val = grub_cpu_to_be32(val); \
diff --git a/include/grub/fdtbus.h b/include/grub/fdtbus.h
new file mode 100644
index 000000000..985837e55
--- /dev/null
+++ b/include/grub/fdtbus.h
@@ -0,0 +1,73 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2016 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_FDTBUS_HEADER
+#define GRUB_FDTBUS_HEADER 1
+
+#include <grub/fdt.h>
+#include <grub/err.h>
+
+struct grub_fdtbus_dev;
+
+struct grub_fdtbus_driver
+{
+ struct grub_fdtbus_driver *next;
+ struct grub_fdtbus_driver **prev;
+
+ const char *compatible;
+
+ grub_err_t (*attach) (const struct grub_fdtbus_dev *dev);
+ void (*detach) (const struct grub_fdtbus_dev *dev);
+};
+
+extern char EXPORT_VAR(grub_fdtbus_invalid_mapping)[1];
+
+static inline int
+grub_fdtbus_is_mapping_valid (volatile void *m)
+{
+ return m != grub_fdtbus_invalid_mapping;
+}
+
+volatile void *
+EXPORT_FUNC(grub_fdtbus_map_reg) (const struct grub_fdtbus_dev *dev, int reg, grub_size_t *size);
+
+const void *
+EXPORT_FUNC(grub_fdtbus_get_fdt) (void);
+
+const char *
+EXPORT_FUNC(grub_fdtbus_get_name) (const struct grub_fdtbus_dev *dev);
+
+const void *
+EXPORT_FUNC(grub_fdtbus_get_prop) (const struct grub_fdtbus_dev *dev,
+ const char *name,
+ grub_uint32_t *len);
+
+void
+EXPORT_FUNC(grub_fdtbus_register) (struct grub_fdtbus_driver *driver);
+
+void
+EXPORT_FUNC(grub_fdtbus_unregister) (struct grub_fdtbus_driver *driver);
+
+/* Must be called before any register(). */
+/* dtb is assumed to be unfreeable and must remain
+ valid for lifetime of GRUB.
+ */
+void
+grub_fdtbus_init (const void *dtb, grub_size_t size);
+
+#endif
diff --git a/include/grub/kernel.h b/include/grub/kernel.h
index 20ddf2da2..ecd88ca72 100644
--- a/include/grub/kernel.h
+++ b/include/grub/kernel.h
@@ -28,7 +28,8 @@ enum
OBJ_TYPE_MEMDISK,
OBJ_TYPE_CONFIG,
OBJ_TYPE_PREFIX,
- OBJ_TYPE_PUBKEY
+ OBJ_TYPE_PUBKEY,
+ OBJ_TYPE_DTB
};
/* The module header. */
diff --git a/include/grub/util/install.h b/include/grub/util/install.h
index 5ca4811cd..6abd288c3 100644
--- a/include/grub/util/install.h
+++ b/include/grub/util/install.h
@@ -176,7 +176,7 @@ grub_install_generate_image (const char *dir, const char *prefix,
char *config_path,
const struct grub_install_image_target_desc *image_target,
int note,
- grub_compression_t comp);
+ grub_compression_t comp, const char *dtb_file);
const struct grub_install_image_target_desc *
grub_install_get_image_target (const char *arg);
diff --git a/util/grub-install-common.c b/util/grub-install-common.c
index 452b230da..8539ff348 100644
--- a/util/grub-install-common.c
+++ b/util/grub-install-common.c
@@ -499,7 +499,7 @@ grub_install_make_image_wrap_file (const char *dir, const char *prefix,
grub_install_generate_image (dir, prefix, fp, outname,
modules.entries, memdisk_path,
pubkeys, npubkeys, config_path, tgt,
- note, compression);
+ note, compression, 0);
while (dc--)
grub_install_pop_module ();
}
diff --git a/util/grub-mkimage.c b/util/grub-mkimage.c
index aba19d21b..98d24cc06 100644
--- a/util/grub-mkimage.c
+++ b/util/grub-mkimage.c
@@ -71,6 +71,7 @@ static struct argp_option options[] = {
N_("embed FILE as a memdisk image\n"
"Implies `-p (memdisk)/boot/grub' and overrides any prefix supplied previously,"
" but the prefix itself can be overridden by later options"), 0},
+ {"dtb", 'D', N_("FILE"), 0, N_("embed FILE as a device tree (DTB)\n"), 0},
/* TRANSLATORS: "embed" is a verb (command description). "*/
{"config", 'c', N_("FILE"), 0, N_("embed FILE as an early config"), 0},
/* TRANSLATORS: "embed" is a verb (command description). "*/
@@ -117,6 +118,7 @@ struct arguments
char *dir;
char *prefix;
char *memdisk;
+ char *dtb;
char **pubkeys;
size_t npubkeys;
char *font;
@@ -176,6 +178,13 @@ argp_parser (int key, char *arg, struct argp_state *state)
arguments->prefix = xstrdup ("(memdisk)/boot/grub");
break;
+ case 'D':
+ if (arguments->dtb)
+ free (arguments->dtb);
+
+ arguments->dtb = xstrdup (arg);
+ break;
+
case 'k':
arguments->pubkeys = xrealloc (arguments->pubkeys,
sizeof (arguments->pubkeys[0])
@@ -300,7 +309,7 @@ main (int argc, char *argv[])
arguments.memdisk, arguments.pubkeys,
arguments.npubkeys, arguments.config,
arguments.image_target, arguments.note,
- arguments.comp);
+ arguments.comp, arguments.dtb);
grub_util_file_sync (fp);
fclose (fp);
diff --git a/util/mkimage.c b/util/mkimage.c
index 6aa77ed73..e22d82afa 100644
--- a/util/mkimage.c
+++ b/util/mkimage.c
@@ -777,13 +777,12 @@ grub_install_generate_image (const char *dir, const char *prefix,
char *memdisk_path, char **pubkey_paths,
size_t npubkeys, char *config_path,
const struct grub_install_image_target_desc *image_target,
- int note,
- grub_compression_t comp)
+ int note, grub_compression_t comp, const char *dtb_path)
{
char *kernel_img, *core_img;
size_t total_module_size, core_size;
size_t memdisk_size = 0, config_size = 0;
- size_t prefix_size = 0;
+ size_t prefix_size = 0, dtb_size = 0;
char *kernel_path;
size_t offset;
struct grub_util_path_list *path_list, *p;
@@ -828,6 +827,12 @@ grub_install_generate_image (const char *dir, const char *prefix,
total_module_size += memdisk_size + sizeof (struct grub_module_header);
}
+ if (dtb_path)
+ {
+ dtb_size = ALIGN_UP(grub_util_get_image_size (dtb_path), 4);
+ total_module_size += dtb_size + sizeof (struct grub_module_header);
+ }
+
if (config_path)
{
config_size = ALIGN_ADDR (grub_util_get_image_size (config_path) + 1);
@@ -950,6 +955,19 @@ grub_install_generate_image (const char *dir, const char *prefix,
offset += memdisk_size;
}
+ if (dtb_path)
+ {
+ struct grub_module_header *header;
+
+ header = (struct grub_module_header *) (kernel_img + offset);
+ header->type = grub_host_to_target32 (OBJ_TYPE_DTB);
+ header->size = grub_host_to_target32 (dtb_size + sizeof (*header));
+ offset += sizeof (*header);
+
+ grub_util_load_image (dtb_path, kernel_img + offset);
+ offset += dtb_size;
+ }
+
if (config_path)
{
struct grub_module_header *header;
--
2.14.3