On 16.12.2013 14:52, Leif Lindholm wrote:
>
> 0001-fdt-additions-required-for-arm64-Linux-loader.patch
>
>
>>From ac2166a62495381736fa05668035230607d1bb3d Mon Sep 17 00:00:00 2001
> From: Leif Lindholm <leif.lindh...@linaro.org>
> Date: Wed, 4 Dec 2013 13:09:21 +0000
> Subject: [PATCH 1/2] fdt: additions required for arm64 Linux loader
>
> - Add grub_fdt_create_empty_tree() function.
> - Add 64-bit setprop.
> ---
> grub-core/lib/fdt.c | 28 ++++++++++++++++++++++++++++
> include/grub/fdt.h | 20 ++++++++++++++++++++
> 2 files changed, 48 insertions(+)
>
> diff --git a/grub-core/lib/fdt.c b/grub-core/lib/fdt.c
> index 9f34dc7..fb13672 100644
> --- a/grub-core/lib/fdt.c
> +++ b/grub-core/lib/fdt.c
> @@ -423,3 +423,31 @@ int grub_fdt_set_prop (void *fdt, unsigned int
> nodeoffset, const char *name,
> grub_memcpy (prop + 3, val, len);
> return 0;
> }
> +
> +int
> +grub_fdt_create_empty_tree (void *fdt, unsigned int size)
> +{
> + struct grub_fdt_empty_tree *et;
> +
> + if (size < GRUB_FDT_EMPTY_TREE_SZ)
> + return -1;
> +
> + grub_memset (fdt, 0, size);
> + et = fdt;
> +
> + et->empty_node.node_end = grub_cpu_to_be32 (FDT_END);
> + et->empty_node.prop_end = grub_cpu_to_be32 (FDT_END_NODE);
grub_cpu_to_be32_compile_time is better suited.
> + et->empty_node.prop_start = grub_cpu_to_be32 (FDT_BEGIN_NODE);
> + ((struct grub_fdt_empty_tree *) fdt)->header.off_mem_rsvmap =
> + grub_cpu_to_be32 (ALIGN_UP (sizeof (grub_fdt_header_t), 8));
> +
> + grub_fdt_set_off_dt_strings (fdt, sizeof (*et));
> + grub_fdt_set_off_dt_struct (fdt, sizeof (grub_fdt_header_t) + 16);
> + grub_fdt_set_version (fdt, FDT_SUPPORTED_VERSION);
> + grub_fdt_set_last_comp_version (fdt, FDT_SUPPORTED_VERSION);
> + grub_fdt_set_size_dt_struct (fdt, sizeof (et->empty_node));
> + grub_fdt_set_totalsize (fdt, size);
> + grub_fdt_set_magic (fdt, FDT_MAGIC);
> +
> + return 0;
> +}
> diff --git a/include/grub/fdt.h b/include/grub/fdt.h
> index 2ad0536..bbc88ec 100644
> --- a/include/grub/fdt.h
> +++ b/include/grub/fdt.h
> @@ -36,6 +36,19 @@ typedef struct {
> grub_uint32_t size_dt_struct;
> } grub_fdt_header_t;
>
> +struct grub_fdt_empty_tree {
> + grub_fdt_header_t header;
> + grub_uint64_t empty_rsvmap[2];
> + struct {
> + grub_uint32_t prop_start;
> + grub_uint8_t name[1];
> + grub_uint32_t prop_end;
> + grub_uint32_t node_end;
> + } empty_node;
> +};
> +
> +#define GRUB_FDT_EMPTY_TREE_SZ sizeof (struct grub_fdt_empty_tree)
> +
> #define grub_fdt_get_header(fdt, field) \
> grub_be_to_cpu32(((const grub_fdt_header_t *)(fdt))->field)
> #define grub_fdt_set_header(fdt, field, value) \
> @@ -82,6 +95,7 @@ typedef struct {
> #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_find_subnode (const void *fdt, unsigned int parentoffset,
> const char *name);
> @@ -96,4 +110,10 @@ int grub_fdt_set_prop (void *fdt, unsigned int
> nodeoffset, const char *name,
> grub_fdt_set_prop ((fdt), (nodeoffset), (name), &_val, 4); \
> })
>
> +#define grub_fdt_set_prop64(fdt, nodeoffset, name, val) \
> +({ \
> + grub_uint64_t _val = grub_cpu_to_be64(val); \
> + grub_fdt_set_prop ((fdt), (nodeoffset), (name), &_val, 8); \
> +})
> +
Why not make it into inline function?
> #endif /* ! GRUB_FDT_HEADER */
> -- 1.7.10.4
>
>
>
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> https://lists.gnu.org/mailman/listinfo/grub-devel
> 
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