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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging] xen/dt: Extract bootinfo-independent functions to bootfdt.c
commit 7fa7cb95dc9950091fbe34663542e40eaa09bf08
Author: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
AuthorDate: Tue Jul 22 02:05:19 2025 +0200
Commit: Stefano Stabellini <stefano.stabellini@xxxxxxx>
CommitDate: Mon Jul 21 17:14:03 2025 -0700
xen/dt: Extract bootinfo-independent functions to bootfdt.c
Move all functions independent of "struct bootinfo" back to bootfdt.c
Not a functional change.
Signed-off-by: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
---
xen/common/device-tree/Makefile | 1 +
xen/common/device-tree/bootfdt.c | 99 +++++++++++++++++++++++++++++++++++
xen/common/device-tree/bootinfo-fdt.c | 94 +--------------------------------
3 files changed, 101 insertions(+), 93 deletions(-)
diff --git a/xen/common/device-tree/Makefile b/xen/common/device-tree/Makefile
index 8a3f2be89e..8abc069c4b 100644
--- a/xen/common/device-tree/Makefile
+++ b/xen/common/device-tree/Makefile
@@ -1,3 +1,4 @@
+obj-y += bootfdt.init.o
obj-y += bootinfo-fdt.init.o
obj-y += bootinfo.init.o
obj-y += device-tree.o
diff --git a/xen/common/device-tree/bootfdt.c b/xen/common/device-tree/bootfdt.c
new file mode 100644
index 0000000000..84520eed30
--- /dev/null
+++ b/xen/common/device-tree/bootfdt.c
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include <xen/bootfdt.h>
+#include <xen/bug.h>
+#include <xen/lib.h>
+#include <xen/libfdt/libfdt.h>
+#include <xen/unaligned.h>
+
+void __init device_tree_get_reg(const __be32 **cell, uint32_t address_cells,
+ uint32_t size_cells, paddr_t *start,
+ paddr_t *size)
+{
+ uint64_t dt_start, dt_size;
+
+ /*
+ * dt_next_cell will return uint64_t whereas paddr_t may not be 64-bit.
+ * Thus, there is an implicit cast from uint64_t to paddr_t.
+ */
+ dt_start = dt_next_cell(address_cells, cell);
+ dt_size = dt_next_cell(size_cells, cell);
+
+ if ( dt_start != (paddr_t)dt_start )
+ {
+ printk("Physical address greater than max width supported\n");
+ WARN();
+ }
+
+ if ( dt_size != (paddr_t)dt_size )
+ {
+ printk("Physical size greater than max width supported\n");
+ WARN();
+ }
+
+ /*
+ * Xen will truncate the address/size if it is greater than the maximum
+ * supported width and it will give an appropriate warning.
+ */
+ *start = dt_start;
+ *size = dt_size;
+}
+
+u32 __init device_tree_get_u32(const void *fdt, int node,
+ const char *prop_name, u32 dflt)
+{
+ const struct fdt_property *prop;
+
+ prop = fdt_get_property(fdt, node, prop_name, NULL);
+ if ( !prop || prop->len < sizeof(u32) )
+ return dflt;
+
+ return fdt32_to_cpu(get_unaligned_t(uint32_t, prop->data));
+}
+
+int __init device_tree_for_each_node(const void *fdt, int node,
+ device_tree_node_func func,
+ void *data)
+{
+ /*
+ * We only care about relative depth increments, assume depth of
+ * node is 0 for simplicity.
+ */
+ int depth = 0;
+ const int first_node = node;
+ u32 address_cells[DEVICE_TREE_MAX_DEPTH];
+ u32 size_cells[DEVICE_TREE_MAX_DEPTH];
+ int ret;
+
+ do {
+ const char *name = fdt_get_name(fdt, node, NULL);
+ u32 as, ss;
+
+ if ( depth >= DEVICE_TREE_MAX_DEPTH )
+ {
+ printk("Warning: device tree node `%s' is nested too deep\n",
+ name);
+ continue;
+ }
+
+ as = depth > 0 ? address_cells[depth-1] :
DT_ROOT_NODE_ADDR_CELLS_DEFAULT;
+ ss = depth > 0 ? size_cells[depth-1] : DT_ROOT_NODE_SIZE_CELLS_DEFAULT;
+
+ address_cells[depth] = device_tree_get_u32(fdt, node,
+ "#address-cells", as);
+ size_cells[depth] = device_tree_get_u32(fdt, node,
+ "#size-cells", ss);
+
+ /* skip the first node */
+ if ( node != first_node )
+ {
+ ret = func(fdt, node, name, depth, as, ss, data);
+ if ( ret != 0 )
+ return ret;
+ }
+
+ node = fdt_next_node(fdt, node, &depth);
+ } while ( node >= 0 && depth > 0 );
+
+ return 0;
+}
+
diff --git a/xen/common/device-tree/bootinfo-fdt.c
b/xen/common/device-tree/bootinfo-fdt.c
index 8ed8e06872..5111fc9436 100644
--- a/xen/common/device-tree/bootinfo-fdt.c
+++ b/xen/common/device-tree/bootinfo-fdt.c
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
- * Early Device Tree
+ * Early Device Tree with bootinfo hooks
*
* Copyright (C) 2012-2014 Citrix Systems, Inc.
*/
@@ -110,39 +110,6 @@ static bool __init device_tree_is_memory_node(const void
*fdt, int node,
return true;
}
-void __init device_tree_get_reg(const __be32 **cell, uint32_t address_cells,
- uint32_t size_cells, paddr_t *start,
- paddr_t *size)
-{
- uint64_t dt_start, dt_size;
-
- /*
- * dt_next_cell will return uint64_t whereas paddr_t may not be 64-bit.
- * Thus, there is an implicit cast from uint64_t to paddr_t.
- */
- dt_start = dt_next_cell(address_cells, cell);
- dt_size = dt_next_cell(size_cells, cell);
-
- if ( dt_start != (paddr_t)dt_start )
- {
- printk("Physical address greater than max width supported\n");
- WARN();
- }
-
- if ( dt_size != (paddr_t)dt_size )
- {
- printk("Physical size greater than max width supported\n");
- WARN();
- }
-
- /*
- * Xen will truncate the address/size if it is greater than the maximum
- * supported width and it will give an appropriate warning.
- */
- *start = dt_start;
- *size = dt_size;
-}
-
static int __init device_tree_get_meminfo(const void *fdt, int node,
const char *prop_name,
u32 address_cells, u32 size_cells,
@@ -203,65 +170,6 @@ static int __init device_tree_get_meminfo(const void *fdt,
int node,
return 0;
}
-u32 __init device_tree_get_u32(const void *fdt, int node,
- const char *prop_name, u32 dflt)
-{
- const struct fdt_property *prop;
-
- prop = fdt_get_property(fdt, node, prop_name, NULL);
- if ( !prop || prop->len < sizeof(u32) )
- return dflt;
-
- return fdt32_to_cpu(get_unaligned_t(uint32_t, prop->data));
-}
-
-int __init device_tree_for_each_node(const void *fdt, int node,
- device_tree_node_func func,
- void *data)
-{
- /*
- * We only care about relative depth increments, assume depth of
- * node is 0 for simplicity.
- */
- int depth = 0;
- const int first_node = node;
- u32 address_cells[DEVICE_TREE_MAX_DEPTH];
- u32 size_cells[DEVICE_TREE_MAX_DEPTH];
- int ret;
-
- do {
- const char *name = fdt_get_name(fdt, node, NULL);
- u32 as, ss;
-
- if ( depth >= DEVICE_TREE_MAX_DEPTH )
- {
- printk("Warning: device tree node `%s' is nested too deep\n",
- name);
- continue;
- }
-
- as = depth > 0 ? address_cells[depth-1] :
DT_ROOT_NODE_ADDR_CELLS_DEFAULT;
- ss = depth > 0 ? size_cells[depth-1] : DT_ROOT_NODE_SIZE_CELLS_DEFAULT;
-
- address_cells[depth] = device_tree_get_u32(fdt, node,
- "#address-cells", as);
- size_cells[depth] = device_tree_get_u32(fdt, node,
- "#size-cells", ss);
-
- /* skip the first node */
- if ( node != first_node )
- {
- ret = func(fdt, node, name, depth, as, ss, data);
- if ( ret != 0 )
- return ret;
- }
-
- node = fdt_next_node(fdt, node, &depth);
- } while ( node >= 0 && depth > 0 );
-
- return 0;
-}
-
static int __init process_memory_node(const void *fdt, int node,
const char *name, int depth,
u32 address_cells, u32 size_cells,
--
generated by git-patchbot for /home/xen/git/xen.git#staging
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