linux-kernel - [PATCH 1/5] x86: efi: refactor efi

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Message-Id: <1325610682-24811-2-git-send-email-olof@lixom.net>
Date:	Tue,  3 Jan 2012 09:11:18 -0800
From:	Olof Johansson <olof@...om.net>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Matthew Garrett <mjg@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
	Matt Fleming <matt.fleming@...el.com>,
	Olof Johansson <olof@...om.net>
Subject: [PATCH 1/5] x86: efi: refactor efi_init() a bit

Break out some of the init steps into helper functions.

No code changes at all, identical execution flow.

Signed-off-by: Olof Johansson <olof@...om.net>
---
 arch/x86/platform/efi/efi.c |   89 +++++++++++++++++++++++++++----------------
 1 files changed, 56 insertions(+), 33 deletions(-)

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 4cf9bd0..0c9ba03 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -429,23 +429,8 @@ static void __init efi_free_boot_services(void)
 	}
 }
 
-void __init efi_init(void)
+static void __init efi_systab_init(void *phys)
 {
-	efi_config_table_t *config_tables;
-	efi_runtime_services_t *runtime;
-	efi_char16_t *c16;
-	char vendor[100] = "unknown";
-	int i = 0;
-	void *tmp;
-
-#ifdef CONFIG_X86_32
-	efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
-#else
-	efi_phys.systab = (efi_system_table_t *)
-		(boot_params.efi_info.efi_systab |
-		 ((__u64)boot_params.efi_info.efi_systab_hi<<32));
-#endif
-
 	efi.systab = early_ioremap((unsigned long)efi_phys.systab,
 				   sizeof(efi_system_table_t));
 	if (efi.systab == NULL)
@@ -464,22 +449,12 @@ void __init efi_init(void)
 		       "%d.%02d, expected 1.00 or greater!\n",
 		       efi.systab->hdr.revision >> 16,
 		       efi.systab->hdr.revision & 0xffff);
+}
 
-	/*
-	 * Show what we know for posterity
-	 */
-	c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2);
-	if (c16) {
-		for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i)
-			vendor[i] = *c16++;
-		vendor[i] = '\0';
-	} else
-		printk(KERN_ERR PFX "Could not map the firmware vendor!\n");
-	early_iounmap(tmp, 2);
-
-	printk(KERN_INFO "EFI v%u.%.02u by %s\n",
-	       efi.systab->hdr.revision >> 16,
-	       efi.systab->hdr.revision & 0xffff, vendor);
+static void __init efi_config_init(u64 tables, int nr_tables)
+{
+	efi_config_table_t *config_tables;
+	int i;
 
 	/*
 	 * Let's see what config tables the firmware passed to us.
@@ -526,6 +501,11 @@ void __init efi_init(void)
 	printk("\n");
 	early_iounmap(config_tables,
 			  efi.systab->nr_tables * sizeof(efi_config_table_t));
+}
+
+static void __init efi_runtime_init(void)
+{
+	efi_runtime_services_t *runtime;
 
 	/*
 	 * Check out the runtime services table. We need to map
@@ -554,7 +534,10 @@ void __init efi_init(void)
 		printk(KERN_ERR "Could not map the EFI runtime service "
 		       "table!\n");
 	early_iounmap(runtime, sizeof(efi_runtime_services_t));
+}
 
+static void __init efi_memmap_init(void)
+{
 	/* Map the EFI memory map */
 	memmap.map = early_ioremap((unsigned long)memmap.phys_map,
 				   memmap.nr_map * memmap.desc_size);
@@ -563,11 +546,51 @@ void __init efi_init(void)
 	memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
 
 	if (memmap.desc_size != sizeof(efi_memory_desc_t))
-		printk(KERN_WARNING
-		  "Kernel-defined memdesc doesn't match the one from EFI!\n");
+		printk(KERN_WARNING "Kernel-defined memdesc doesn't match the "
+		       "one from EFI!\n");
 
 	if (add_efi_memmap)
 		do_add_efi_memmap();
+}
+
+void __init efi_init(void)
+{
+	efi_char16_t *c16;
+	char vendor[100] = "unknown";
+	int i = 0;
+	void *tmp;
+
+#ifdef CONFIG_X86_32
+	efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
+#else
+	efi_phys.systab = (efi_system_table_t *)
+		(boot_params.efi_info.efi_systab |
+		 ((__u64)boot_params.efi_info.efi_systab_hi<<32));
+#endif
+
+	efi_systab_init(efi_phys.systab);
+
+	/*
+	 * Show what we know for posterity
+	 */
+	c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2);
+	if (c16) {
+		for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i)
+			vendor[i] = *c16++;
+		vendor[i] = '\0';
+	} else
+		printk(KERN_ERR PFX "Could not map the firmware vendor!\n");
+	early_iounmap(tmp, 2);
+
+	printk(KERN_INFO "EFI v%u.%.02u by %s\n",
+	       efi.systab->hdr.revision >> 16,
+	       efi.systab->hdr.revision & 0xffff, vendor);
+
+	efi_config_init(efi.systab->tables, efi.systab->nr_tables);
+
+	efi_runtime_init();
+
+	efi_memmap_init();
 
 #ifdef CONFIG_X86_32
 	x86_platform.get_wallclock = efi_get_time;
-- 
1.7.8.GIT

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