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Subject[PATCH v4 3/6] efi: move FDT handling to separate object file
Date
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

The EFI specific FDT handling is compiled conditionally, and is
logically independent of the rest of efi.o. So move it to a separate
file before making changes to it in subsequent patches.

Acked-by: Matt Fleming <matt.fleming@intel.com>
Acked-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Message-Id: <1442881288-13962-4-git-send-email-ard.biesheuvel@linaro.org>
[ rric: Ported to v4.5-rc1 ]
Signed-off-by: Robert Richter <rrichter@cavium.com>
---
drivers/firmware/efi/Makefile | 1 +
drivers/firmware/efi/efi-fdt.c | 91 ++++++++++++++++++++++++++++++++++++++++++
drivers/firmware/efi/efi.c | 84 --------------------------------------
3 files changed, 92 insertions(+), 84 deletions(-)
create mode 100644 drivers/firmware/efi/efi-fdt.c

diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index 62e654f255f4..bb7ec2fac25c 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_EFI_RUNTIME_MAP) += runtime-map.o
obj-$(CONFIG_EFI_RUNTIME_WRAPPERS) += runtime-wrappers.o
obj-$(CONFIG_EFI_STUB) += libstub/
obj-$(CONFIG_EFI_FAKE_MEMMAP) += fake_mem.o
+obj-$(CONFIG_EFI_PARAMS_FROM_FDT) += efi-fdt.o

arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o
obj-$(CONFIG_ARM) += $(arm-obj-y)
diff --git a/drivers/firmware/efi/efi-fdt.c b/drivers/firmware/efi/efi-fdt.c
new file mode 100644
index 000000000000..8f3ce66e2b02
--- /dev/null
+++ b/drivers/firmware/efi/efi-fdt.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2013 - 2015 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/efi.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+
+#define UEFI_PARAM(name, prop, field) \
+ { \
+ { name }, \
+ { prop }, \
+ offsetof(struct efi_fdt_params, field), \
+ FIELD_SIZEOF(struct efi_fdt_params, field) \
+ }
+
+static __initdata struct {
+ const char name[32];
+ const char propname[32];
+ int offset;
+ int size;
+} dt_params[] = {
+ UEFI_PARAM("System Table", "linux,uefi-system-table", system_table),
+ UEFI_PARAM("MemMap Address", "linux,uefi-mmap-start", mmap),
+ UEFI_PARAM("MemMap Size", "linux,uefi-mmap-size", mmap_size),
+ UEFI_PARAM("MemMap Desc. Size", "linux,uefi-mmap-desc-size", desc_size),
+ UEFI_PARAM("MemMap Desc. Version", "linux,uefi-mmap-desc-ver", desc_ver)
+};
+
+struct param_info {
+ int found;
+ void *params;
+};
+
+static int __init fdt_find_uefi_params(unsigned long node, const char *uname,
+ int depth, void *data)
+{
+ struct param_info *info = data;
+ const void *prop;
+ void *dest;
+ u64 val;
+ int i, len;
+
+ if (depth != 1 || strcmp(uname, "chosen") != 0)
+ return 0;
+
+ for (i = 0; i < ARRAY_SIZE(dt_params); i++) {
+ prop = of_get_flat_dt_prop(node, dt_params[i].propname, &len);
+ if (!prop)
+ return 0;
+ dest = info->params + dt_params[i].offset;
+ info->found++;
+
+ val = of_read_number(prop, len / sizeof(u32));
+
+ if (dt_params[i].size == sizeof(u32))
+ *(u32 *)dest = val;
+ else
+ *(u64 *)dest = val;
+
+ if (efi_enabled(EFI_DBG))
+ pr_info(" %s: 0x%0*llx\n", dt_params[i].name,
+ dt_params[i].size * 2, val);
+ }
+ return 1;
+}
+
+int __init efi_get_fdt_params(struct efi_fdt_params *params)
+{
+ struct param_info info;
+ int ret;
+
+ pr_info("Getting EFI parameters from FDT:\n");
+
+ info.found = 0;
+ info.params = params;
+
+ ret = of_scan_flat_dt(fdt_find_uefi_params, &info);
+ if (!info.found)
+ pr_info("UEFI not found.\n");
+ else if (!ret)
+ pr_err("Can't find '%s' in device tree!\n",
+ dt_params[info.found].name);
+
+ return ret;
+}
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 2cd37dad67a6..7c41c4284814 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -20,8 +20,6 @@
#include <linux/init.h>
#include <linux/device.h>
#include <linux/efi.h>
-#include <linux/of.h>
-#include <linux/of_fdt.h>
#include <linux/io.h>
#include <linux/platform_device.h>

@@ -490,88 +488,6 @@ static int __init efi_load_efivars(void)
device_initcall(efi_load_efivars);
#endif

-#ifdef CONFIG_EFI_PARAMS_FROM_FDT
-
-#define UEFI_PARAM(name, prop, field) \
- { \
- { name }, \
- { prop }, \
- offsetof(struct efi_fdt_params, field), \
- FIELD_SIZEOF(struct efi_fdt_params, field) \
- }
-
-static __initdata struct {
- const char name[32];
- const char propname[32];
- int offset;
- int size;
-} dt_params[] = {
- UEFI_PARAM("System Table", "linux,uefi-system-table", system_table),
- UEFI_PARAM("MemMap Address", "linux,uefi-mmap-start", mmap),
- UEFI_PARAM("MemMap Size", "linux,uefi-mmap-size", mmap_size),
- UEFI_PARAM("MemMap Desc. Size", "linux,uefi-mmap-desc-size", desc_size),
- UEFI_PARAM("MemMap Desc. Version", "linux,uefi-mmap-desc-ver", desc_ver)
-};
-
-struct param_info {
- int found;
- void *params;
-};
-
-static int __init fdt_find_uefi_params(unsigned long node, const char *uname,
- int depth, void *data)
-{
- struct param_info *info = data;
- const void *prop;
- void *dest;
- u64 val;
- int i, len;
-
- if (depth != 1 || strcmp(uname, "chosen") != 0)
- return 0;
-
- for (i = 0; i < ARRAY_SIZE(dt_params); i++) {
- prop = of_get_flat_dt_prop(node, dt_params[i].propname, &len);
- if (!prop)
- return 0;
- dest = info->params + dt_params[i].offset;
- info->found++;
-
- val = of_read_number(prop, len / sizeof(u32));
-
- if (dt_params[i].size == sizeof(u32))
- *(u32 *)dest = val;
- else
- *(u64 *)dest = val;
-
- if (efi_enabled(EFI_DBG))
- pr_info(" %s: 0x%0*llx\n", dt_params[i].name,
- dt_params[i].size * 2, val);
- }
- return 1;
-}
-
-int __init efi_get_fdt_params(struct efi_fdt_params *params)
-{
- struct param_info info;
- int ret;
-
- pr_info("Getting EFI parameters from FDT:\n");
-
- info.found = 0;
- info.params = params;
-
- ret = of_scan_flat_dt(fdt_find_uefi_params, &info);
- if (!info.found)
- pr_info("UEFI not found.\n");
- else if (!ret)
- pr_err("Can't find '%s' in device tree!\n",
- dt_params[info.found].name);
-
- return ret;
-}
-#endif /* CONFIG_EFI_PARAMS_FROM_FDT */
-
static __initdata char memory_type_name[][20] = {
"Reserved",
"Loader Code",
--
2.7.0.rc3
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