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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2011-02-22 21:07:40 +0100
committerThomas Gleixner <tglx@linutronix.de>2011-02-23 22:27:53 +0100
commit3879a6f32948330782889cebc4d74c4f2316c676 (patch)
treea3e8b6904eea8593e72ff9b52e2ce4c5697f60da /arch/x86/include/asm
parent19c4f5f7f7e9c5db89a91627af2a426cfb5568de (diff)
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x86: dtb: Add early parsing of IO_APIC
APIC and IO_APIC have to be added to the system early because native_init_IRQ() requires it. In order to obtain the address of the ioapic the device tree has to be unflattened so of_address_to_resource() works. The device tree is relocated to ensure it is always covered by the kernel mapping. That way the boot loader does not have to make any assumptions about kernel's memory layout. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org Cc: Dirk Brandewie <dirk.brandewie@gmail.com> LKML-Reference: <1298405266-1624-6-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include/asm')
-rw-r--r--arch/x86/include/asm/prom.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/prom.h b/arch/x86/include/asm/prom.h
index 83833ac..35ec32b 100644
--- a/arch/x86/include/asm/prom.h
+++ b/arch/x86/include/asm/prom.h
@@ -23,10 +23,17 @@
#include <asm/irq_controller.h>
#ifdef CONFIG_OF
+extern int of_ioapic;
+extern u64 initial_dtb;
extern void add_dtb(u64 data);
+void x86_dtb_find_config(void);
+void x86_dtb_get_config(unsigned int unused);
void add_interrupt_host(struct irq_domain *ih);
#else
static inline void add_dtb(u64 data) { }
+#define x86_dtb_find_config x86_init_noop
+#define x86_dtb_get_config x86_init_uint_noop
+#define of_ioapic 0
#endif
extern char cmd_line[COMMAND_LINE_SIZE];