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| author | Simon Glass <sjg@chromium.org> | 2016-03-11 22:07:34 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2016-03-17 10:27:27 +0800 |
| commit | 1cb1611fc6e6223b5281e5e0187855eb0b9f719d (patch) | |
| tree | 68e9990c5b08199d7759bdb1914a990665b5f2e0 /arch | |
| parent | f21069ff8aea4faee7849b9e821587f95c23434d (diff) | |
| download | u-boot-imx-1cb1611fc6e6223b5281e5e0187855eb0b9f719d.zip u-boot-imx-1cb1611fc6e6223b5281e5e0187855eb0b9f719d.tar.gz u-boot-imx-1cb1611fc6e6223b5281e5e0187855eb0b9f719d.tar.bz2 | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/cpu/ioapic.c | 16 | ||||
| -rw-r--r-- | arch/x86/include/asm/ioapic.h | 2 |
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 |