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authorSimon Glass <sjg@chromium.org>2016-03-11 22:07:34 -0700
committerBin Meng <bmeng.cn@gmail.com>2016-03-17 10:27:27 +0800
commit1cb1611fc6e6223b5281e5e0187855eb0b9f719d (patch)
tree68e9990c5b08199d7759bdb1914a990665b5f2e0
parentf21069ff8aea4faee7849b9e821587f95c23434d (diff)
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x86: Add a function to set the IOAPIC ID
Add a function to set the ID in the IOAPIC. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
-rw-r--r--arch/x86/cpu/ioapic.c16
-rw-r--r--arch/x86/include/asm/ioapic.h2
2 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/cpu/ioapic.c b/arch/x86/cpu/ioapic.c
index 112a9c6..d15e86c 100644
--- a/arch/x86/cpu/ioapic.c
+++ b/arch/x86/cpu/ioapic.c
@@ -7,6 +7,7 @@
#include <common.h>
#include <asm/io.h>
#include <asm/ioapic.h>
+#include <asm/lapic.h>
u32 io_apic_read(u32 reg)
{
@@ -19,3 +20,18 @@ void io_apic_write(u32 reg, u32 val)
writel(reg, IO_APIC_INDEX);
writel(val, IO_APIC_DATA);
}
+
+void io_apic_set_id(int ioapic_id)
+{
+ int bsp_lapicid = lapicid();
+
+ debug("IOAPIC: Initialising IOAPIC at %08x\n", IO_APIC_ADDR);
+ debug("IOAPIC: Bootstrap Processor Local APIC = %#02x\n", bsp_lapicid);
+
+ if (ioapic_id) {
+ debug("IOAPIC: ID = 0x%02x\n", ioapic_id);
+ /* Set IOAPIC ID if it has been specified */
+ io_apic_write(0x00, (io_apic_read(0x00) & 0xf0ffffff) |
+ (ioapic_id << 24));
+ }
+}
diff --git a/arch/x86/include/asm/ioapic.h b/arch/x86/include/asm/ioapic.h
index 77c443e..2feed86 100644
--- a/arch/x86/include/asm/ioapic.h
+++ b/arch/x86/include/asm/ioapic.h
@@ -39,4 +39,6 @@ u32 io_apic_read(u32 reg);
*/
void io_apic_write(u32 reg, u32 val);
+void io_apic_set_id(int ioapic_id);
+
#endif