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| author | Simon Glass <sjg@chromium.org> | 2016-03-06 19:28:25 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2016-03-17 10:27:23 +0800 |
| commit | d116b53f873c2cba861a7a83f4693d65140989b6 (patch) | |
| tree | d548fb1da19a96a628eb42ebfc8824d40a950178 | |
| parent | 2254e34c3fe5b2545dcad06774a426b2f881a090 (diff) | |
| download | u-boot-d116b53f873c2cba861a7a83f4693d65140989b6.tar.gz u-boot-d116b53f873c2cba861a7a83f4693d65140989b6.tar.xz u-boot-d116b53f873c2cba861a7a83f4693d65140989b6.zip | |
x86: Add comments to the SIPI vector
The Intel SIPI (start-up inter-processor interrupt) vector is the entry
point for each secondary CPU (also called an AP - applications processor).
The assembler and C code are linked, so add comments to indicate this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
| -rw-r--r-- | arch/x86/cpu/sipi_vector.S | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/sipi.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/cpu/sipi_vector.S b/arch/x86/cpu/sipi_vector.S index 0c4a157f38..94c0f5a702 100644 --- a/arch/x86/cpu/sipi_vector.S +++ b/arch/x86/cpu/sipi_vector.S @@ -193,6 +193,7 @@ load_msr: mov c_handler, %esi call *%esi + /* This matches struct sipi_param */ .align 4 .globl sipi_params sipi_params: diff --git a/arch/x86/include/asm/sipi.h b/arch/x86/include/asm/sipi.h index 25d7d311d2..da91a485d8 100644 --- a/arch/x86/include/asm/sipi.h +++ b/arch/x86/include/asm/sipi.h @@ -42,6 +42,7 @@ struct __packed sipi_params_16bit { * struct sipi_params - 32-bit SIP entry-point parameters * * These are used by the AP init code and must be set up before the APs start. + * The members must match with the sipi_params layout in sipi_vector.S. * * The stack area extends down from @stack_top, with @stack_size allocated * for each AP. |