From: Penny Zheng <penny.zheng@arm.com>
To: <xen-devel@lists.xenproject.org>, <sstabellini@kernel.org>,
<julien@xen.org>
Cc: <Bertrand.Marquis@arm.com>, <Penny.Zheng@arm.com>,
<Wei.Chen@arm.com>, <nd@arm.com>
Subject: [PATCH V4 02/10] xen/arm: introduce new helper device_tree_get_meminfo
Date: Wed, 28 Jul 2021 10:27:49 +0000 [thread overview]
Message-ID: <20210728102758.3269446-3-penny.zheng@arm.com> (raw)
In-Reply-To: <20210728102758.3269446-1-penny.zheng@arm.com>
A few functions iterate over the device tree property to get memory info,
like "reg" or "xen,static-mem", so this commit creates a new helper
device_tree_get_meminfo to extract the
common codes.
Signed-off-by: Penny Zheng <penny.zheng@arm.com>
---
xen/arch/arm/bootfdt.c | 104 +++++++++++++++++------------------------
1 file changed, 42 insertions(+), 62 deletions(-)
diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c
index d2714446e1..04210684c9 100644
--- a/xen/arch/arm/bootfdt.c
+++ b/xen/arch/arm/bootfdt.c
@@ -63,6 +63,44 @@ void __init device_tree_get_reg(const __be32 **cell, u32 address_cells,
*size = dt_next_cell(size_cells, cell);
}
+static int __init device_tree_get_meminfo(const void *fdt, int node,
+ const char *prop_name,
+ u32 address_cells, u32 size_cells,
+ void *data)
+{
+ const struct fdt_property *prop;
+ unsigned int i, banks;
+ const __be32 *cell;
+ u32 reg_cells = address_cells + size_cells;
+ paddr_t start, size;
+ struct meminfo *mem = data;
+
+ prop = fdt_get_property(fdt, node, prop_name, NULL);
+ if ( !prop )
+ return -ENOENT;
+
+ cell = (const __be32 *)prop->data;
+ banks = fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32));
+
+ for ( i = 0; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ )
+ {
+ device_tree_get_reg(&cell, address_cells, size_cells, &start, &size);
+ /* Some DT may describe empty bank, ignore them */
+ if ( !size )
+ continue;
+ mem->bank[mem->nr_banks].start = start;
+ mem->bank[mem->nr_banks].size = size;
+ mem->nr_banks++;
+ }
+
+ if ( i < banks )
+ {
+ printk("Warning: Max number of supported memory regions reached.\n");
+ return -ENOSPC;
+ }
+ return 0;
+}
+
u32 __init device_tree_get_u32(const void *fdt, int node,
const char *prop_name, u32 dflt)
{
@@ -139,14 +177,6 @@ static int __init process_memory_node(const void *fdt, int node,
u32 address_cells, u32 size_cells,
void *data)
{
- const struct fdt_property *prop;
- int i;
- int banks;
- const __be32 *cell;
- paddr_t start, size;
- u32 reg_cells = address_cells + size_cells;
- struct meminfo *mem = data;
-
if ( address_cells < 1 || size_cells < 1 )
{
printk("fdt: node `%s': invalid #address-cells or #size-cells",
@@ -154,27 +184,7 @@ static int __init process_memory_node(const void *fdt, int node,
return -EINVAL;
}
- prop = fdt_get_property(fdt, node, "reg", NULL);
- if ( !prop )
- return -ENOENT;
-
- cell = (const __be32 *)prop->data;
- banks = fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32));
-
- for ( i = 0; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ )
- {
- device_tree_get_reg(&cell, address_cells, size_cells, &start, &size);
- /* Some DT may describe empty bank, ignore them */
- if ( !size )
- continue;
- mem->bank[mem->nr_banks].start = start;
- mem->bank[mem->nr_banks].size = size;
- mem->nr_banks++;
- }
-
- if ( i < banks )
- return -ENOSPC;
- return 0;
+ return device_tree_get_meminfo(fdt, node, "reg", address_cells, size_cells, data);
}
static int __init process_reserved_memory_node(const void *fdt, int node,
@@ -195,13 +205,7 @@ static int __init process_reserved_memory_node(const void *fdt, int node,
static int __init process_static_memory(const void *fdt, int node, void *data)
{
- int i = 0, banks;
- const __be32 *cell;
- paddr_t start, size;
- u32 address_cells, size_cells, reg_cells;
- struct meminfo *mem = data;
- const struct fdt_property *prop;
-
+ u32 address_cells, size_cells;
address_cells = device_tree_get_u32(fdt, node,
"#xen,static-mem-address-cells", 0);
@@ -213,33 +217,9 @@ static int __init process_static_memory(const void *fdt, int node, void *data)
"\"#xen,static-mem-address-cell\".\n");
return -EINVAL;
}
- reg_cells = address_cells + size_cells;
-
- prop = fdt_get_property(fdt, node, "xen,static-mem", NULL);
- /*
- * Static memory shall belong to a specific domain, that is,
- * its node `domUx` has compatible string "xen,domain".
- */
- if ( fdt_node_check_compatible(fdt, node, "xen,domain") != 0 )
- {
- printk("xen,static-mem property can only be located under /domUx node.\n");
- return -EINVAL;
- }
-
- cell = (const __be32 *)prop->data;
- banks = fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32));
-
- for ( ; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ )
- {
- device_tree_get_reg(&cell, address_cells, size_cells, &start, &size);
- mem->bank[mem->nr_banks].start = start;
- mem->bank[mem->nr_banks].size = size;
- mem->nr_banks++;
- }
- if ( i < banks )
- return -ENOSPC;
- return 0;
+ return device_tree_get_meminfo(fdt, node, "xen,static-mem", address_cells,
+ size_cells, data);
}
static int __init process_reserved_memory(const void *fdt, int node,
--
2.25.1
next prev parent reply other threads:[~2021-07-28 10:28 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 10:27 [PATCH V4 00/10] Domain on Static Allocation Penny Zheng
2021-07-28 10:27 ` [PATCH V4 01/10] xen/arm: introduce domain " Penny Zheng
2021-08-11 13:32 ` Julien Grall
2021-08-16 5:21 ` Penny Zheng
2021-08-16 17:27 ` Julien Grall
2021-08-17 2:28 ` Penny Zheng
2021-07-28 10:27 ` Penny Zheng [this message]
2021-08-11 13:35 ` [PATCH V4 02/10] xen/arm: introduce new helper device_tree_get_meminfo Julien Grall
2021-08-16 5:27 ` Penny Zheng
2021-07-28 10:27 ` [PATCH V4 03/10] xen/arm: handle static memory in dt_unreserved_regions Penny Zheng
2021-08-11 13:48 ` Julien Grall
2021-08-16 6:00 ` Penny Zheng
2021-08-16 17:33 ` Julien Grall
2021-07-28 10:27 ` [PATCH V4 04/10] xen: introduce mark_page_free Penny Zheng
2021-08-11 14:08 ` Julien Grall
2021-07-28 10:27 ` [PATCH V4 05/10] xen/arm: static memory initialization Penny Zheng
2021-08-04 15:54 ` Jan Beulich
2021-08-13 12:20 ` Julien Grall
2021-08-16 6:12 ` Penny Zheng
2021-08-13 12:38 ` Julien Grall
2021-08-16 7:00 ` Wei Chen
2021-07-28 10:27 ` [PATCH V4 06/10] xen/arm: introduce PGC_reserved Penny Zheng
2021-08-13 12:21 ` Julien Grall
2021-08-16 6:13 ` Penny Zheng
2021-07-28 10:27 ` [PATCH V4 07/10] xen: re-define assign_pages and introduce assign_page Penny Zheng
2021-08-05 6:34 ` Jan Beulich
2021-08-13 12:27 ` Julien Grall
2021-08-13 12:32 ` Jan Beulich
2021-08-17 8:21 ` Penny Zheng
2021-07-28 10:27 ` [PATCH V4 08/10] xen/arm: introduce acquire_staticmem_pages and acquire_domstatic_pages Penny Zheng
2021-08-05 6:52 ` Jan Beulich
2021-08-13 13:00 ` Julien Grall
2021-08-16 6:43 ` Penny Zheng
2021-08-16 17:43 ` Julien Grall
2021-08-17 2:33 ` Penny Zheng
2021-07-28 10:27 ` [PATCH V4 09/10] xen/arm: check "xen,static-mem" property during domain construction Penny Zheng
2021-08-13 13:12 ` Julien Grall
2021-08-16 6:53 ` Penny Zheng
2021-07-28 10:27 ` [PATCH V4 10/10] xen/arm: introduce allocate_static_memory Penny Zheng
2021-08-13 13:36 ` Julien Grall
2021-08-16 7:51 ` Penny Zheng
2021-08-16 17:55 ` Julien Grall
2021-08-17 2:36 ` Penny Zheng
2021-07-28 10:27 ` [PATCH V4 04/10] xen: introduce mark_page_free Penny Zheng
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